1 /* Functions for image support on window system.
2 Copyright (C) 1989, 1992-2011 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
26 #if defined HAVE_LIBPNG_PNG_H
27 # include <libpng/png.h>
35 /* This makes the fields of a Display accessible, in Xlib header files. */
37 #define XLIB_ILLEGAL_ACCESS
42 #include "dispextern.h"
43 #include "blockinput.h"
46 #include "character.h"
48 #include "termhooks.h"
53 #include <sys/types.h>
56 #define COLOR_TABLE_SUPPORT 1
58 typedef struct x_bitmap_record Bitmap_Record
;
59 #define GET_PIXEL(ximg, x, y) XGetPixel(ximg, x, y)
60 #define NO_PIXMAP None
62 #define RGB_PIXEL_COLOR unsigned long
64 #define PIX_MASK_RETAIN 0
65 #define PIX_MASK_DRAW 1
66 #endif /* HAVE_X_WINDOWS */
73 /* W32_TODO : Color tables on W32. */
74 #undef COLOR_TABLE_SUPPORT
76 typedef struct w32_bitmap_record Bitmap_Record
;
77 #define GET_PIXEL(ximg, x, y) GetPixel(ximg, x, y)
80 #define RGB_PIXEL_COLOR COLORREF
82 #define PIX_MASK_RETAIN 0
83 #define PIX_MASK_DRAW 1
85 #define FRAME_X_VISUAL(f) FRAME_X_DISPLAY_INFO (f)->visual
86 #define x_defined_color w32_defined_color
87 #define DefaultDepthOfScreen(screen) (one_w32_display_info.n_cbits)
89 /* Functions from w32term.c that depend on XColor (so can't go in w32term.h
90 without modifying lots of files). */
91 extern void x_query_colors (struct frame
*f
, XColor
*colors
, int ncolors
);
92 extern void x_query_color (struct frame
*f
, XColor
*color
);
94 /* Version of libpng that we were compiled with, or -1 if no PNG
95 support was compiled in. This is tested by w32-win.el to correctly
96 set up the alist used to search for PNG libraries. */
97 Lisp_Object Qlibpng_version
;
98 #endif /* HAVE_NTGUI */
102 #include <sys/types.h>
103 #include <sys/stat.h>
105 #undef COLOR_TABLE_SUPPORT
107 typedef struct ns_bitmap_record Bitmap_Record
;
109 #define GET_PIXEL(ximg, x, y) XGetPixel(ximg, x, y)
112 #define RGB_PIXEL_COLOR unsigned long
115 #define PIX_MASK_RETAIN 0
116 #define PIX_MASK_DRAW 1
118 #define FRAME_X_VISUAL FRAME_NS_DISPLAY_INFO(f)->visual
119 #define x_defined_color(f, name, color_def, alloc) \
120 ns_defined_color (f, name, color_def, alloc, 0)
121 #define FRAME_X_SCREEN(f) 0
122 #define DefaultDepthOfScreen(screen) x_display_list->n_planes
126 /* The symbol `postscript' identifying images of this type. */
128 static Lisp_Object Qpostscript
;
130 static void x_disable_image (struct frame
*, struct image
*);
131 static void x_edge_detection (struct frame
*, struct image
*, Lisp_Object
,
134 static void init_color_table (void);
135 static unsigned long lookup_rgb_color (struct frame
*f
, int r
, int g
, int b
);
136 #ifdef COLOR_TABLE_SUPPORT
137 static void free_color_table (void);
138 static unsigned long *colors_in_color_table (int *n
);
140 static Lisp_Object
Finit_image_library (Lisp_Object
, Lisp_Object
);
142 /* Code to deal with bitmaps. Bitmaps are referenced by their bitmap
143 id, which is just an int that this section returns. Bitmaps are
144 reference counted so they can be shared among frames.
146 Bitmap indices are guaranteed to be > 0, so a negative number can
147 be used to indicate no bitmap.
149 If you use x_create_bitmap_from_data, then you must keep track of
150 the bitmaps yourself. That is, creating a bitmap from the same
151 data more than once will not be caught. */
155 XGetImage (Display
*display
, Pixmap pixmap
, int x
, int y
,
156 unsigned int width
, unsigned int height
,
157 unsigned long plane_mask
, int format
)
159 /* TODO: not sure what this function is supposed to do.. */
160 ns_retain_object (pixmap
);
164 /* use with imgs created by ns_image_for_XPM */
166 XGetPixel (XImagePtr ximage
, int x
, int y
)
168 return ns_get_pixel (ximage
, x
, y
);
171 /* use with imgs created by ns_image_for_XPM; alpha set to 1;
172 pixel is assumed to be in form RGB */
174 XPutPixel (XImagePtr ximage
, int x
, int y
, unsigned long pixel
)
176 ns_put_pixel (ximage
, x
, y
, pixel
);
181 /* Functions to access the contents of a bitmap, given an id. */
184 x_bitmap_height (FRAME_PTR f
, ptrdiff_t id
)
186 return FRAME_X_DISPLAY_INFO (f
)->bitmaps
[id
- 1].height
;
190 x_bitmap_width (FRAME_PTR f
, ptrdiff_t id
)
192 return FRAME_X_DISPLAY_INFO (f
)->bitmaps
[id
- 1].width
;
195 #if defined (HAVE_X_WINDOWS) || defined (HAVE_NTGUI)
197 x_bitmap_pixmap (FRAME_PTR f
, ptrdiff_t id
)
199 return (int) FRAME_X_DISPLAY_INFO (f
)->bitmaps
[id
- 1].pixmap
;
203 #ifdef HAVE_X_WINDOWS
205 x_bitmap_mask (FRAME_PTR f
, ptrdiff_t id
)
207 return FRAME_X_DISPLAY_INFO (f
)->bitmaps
[id
- 1].mask
;
211 /* Allocate a new bitmap record. Returns index of new record. */
214 x_allocate_bitmap_record (FRAME_PTR f
)
216 Display_Info
*dpyinfo
= FRAME_X_DISPLAY_INFO (f
);
219 if (dpyinfo
->bitmaps
== NULL
)
221 dpyinfo
->bitmaps_size
= 10;
223 = (Bitmap_Record
*) xmalloc (dpyinfo
->bitmaps_size
* sizeof (Bitmap_Record
));
224 dpyinfo
->bitmaps_last
= 1;
228 if (dpyinfo
->bitmaps_last
< dpyinfo
->bitmaps_size
)
229 return ++dpyinfo
->bitmaps_last
;
231 for (i
= 0; i
< dpyinfo
->bitmaps_size
; ++i
)
232 if (dpyinfo
->bitmaps
[i
].refcount
== 0)
235 if (min (PTRDIFF_MAX
, SIZE_MAX
) / sizeof (Bitmap_Record
) / 2
236 < dpyinfo
->bitmaps_size
)
237 memory_full (SIZE_MAX
);
238 dpyinfo
->bitmaps_size
*= 2;
240 = (Bitmap_Record
*) xrealloc (dpyinfo
->bitmaps
,
241 dpyinfo
->bitmaps_size
* sizeof (Bitmap_Record
));
242 return ++dpyinfo
->bitmaps_last
;
245 /* Add one reference to the reference count of the bitmap with id ID. */
248 x_reference_bitmap (FRAME_PTR f
, int id
)
250 ++FRAME_X_DISPLAY_INFO (f
)->bitmaps
[id
- 1].refcount
;
253 /* Create a bitmap for frame F from a HEIGHT x WIDTH array of bits at BITS. */
256 x_create_bitmap_from_data (struct frame
*f
, char *bits
, unsigned int width
, unsigned int height
)
258 Display_Info
*dpyinfo
= FRAME_X_DISPLAY_INFO (f
);
261 #ifdef HAVE_X_WINDOWS
263 bitmap
= XCreateBitmapFromData (FRAME_X_DISPLAY (f
), FRAME_X_WINDOW (f
),
264 bits
, width
, height
);
267 #endif /* HAVE_X_WINDOWS */
271 bitmap
= CreateBitmap (width
, height
,
272 FRAME_X_DISPLAY_INFO (XFRAME (frame
))->n_planes
,
273 FRAME_X_DISPLAY_INFO (XFRAME (frame
))->n_cbits
,
277 #endif /* HAVE_NTGUI */
280 void *bitmap
= ns_image_from_XBM (bits
, width
, height
);
285 id
= x_allocate_bitmap_record (f
);
288 dpyinfo
->bitmaps
[id
- 1].img
= bitmap
;
289 dpyinfo
->bitmaps
[id
- 1].depth
= 1;
292 dpyinfo
->bitmaps
[id
- 1].file
= NULL
;
293 dpyinfo
->bitmaps
[id
- 1].height
= height
;
294 dpyinfo
->bitmaps
[id
- 1].width
= width
;
295 dpyinfo
->bitmaps
[id
- 1].refcount
= 1;
297 #ifdef HAVE_X_WINDOWS
298 dpyinfo
->bitmaps
[id
- 1].pixmap
= bitmap
;
299 dpyinfo
->bitmaps
[id
- 1].have_mask
= 0;
300 dpyinfo
->bitmaps
[id
- 1].depth
= 1;
301 #endif /* HAVE_X_WINDOWS */
304 dpyinfo
->bitmaps
[id
- 1].pixmap
= bitmap
;
305 dpyinfo
->bitmaps
[id
- 1].hinst
= NULL
;
306 dpyinfo
->bitmaps
[id
- 1].depth
= 1;
307 #endif /* HAVE_NTGUI */
312 /* Create bitmap from file FILE for frame F. */
315 x_create_bitmap_from_file (struct frame
*f
, Lisp_Object file
)
317 Display_Info
*dpyinfo
= FRAME_X_DISPLAY_INFO (f
);
320 return -1; /* W32_TODO : bitmap support */
321 #endif /* HAVE_NTGUI */
325 void *bitmap
= ns_image_from_file (file
);
331 id
= x_allocate_bitmap_record (f
);
332 dpyinfo
->bitmaps
[id
- 1].img
= bitmap
;
333 dpyinfo
->bitmaps
[id
- 1].refcount
= 1;
334 dpyinfo
->bitmaps
[id
- 1].file
= (char *) xmalloc (SBYTES (file
) + 1);
335 dpyinfo
->bitmaps
[id
- 1].depth
= 1;
336 dpyinfo
->bitmaps
[id
- 1].height
= ns_image_width (bitmap
);
337 dpyinfo
->bitmaps
[id
- 1].width
= ns_image_height (bitmap
);
338 strcpy (dpyinfo
->bitmaps
[id
- 1].file
, SDATA (file
));
342 #ifdef HAVE_X_WINDOWS
343 unsigned int width
, height
;
345 int xhot
, yhot
, result
;
351 /* Look for an existing bitmap with the same name. */
352 for (id
= 0; id
< dpyinfo
->bitmaps_last
; ++id
)
354 if (dpyinfo
->bitmaps
[id
].refcount
355 && dpyinfo
->bitmaps
[id
].file
356 && !strcmp (dpyinfo
->bitmaps
[id
].file
, SSDATA (file
)))
358 ++dpyinfo
->bitmaps
[id
].refcount
;
363 /* Search bitmap-file-path for the file, if appropriate. */
364 fd
= openp (Vx_bitmap_file_path
, file
, Qnil
, &found
, Qnil
);
369 filename
= SSDATA (found
);
371 result
= XReadBitmapFile (FRAME_X_DISPLAY (f
), FRAME_X_WINDOW (f
),
372 filename
, &width
, &height
, &bitmap
, &xhot
, &yhot
);
373 if (result
!= BitmapSuccess
)
376 id
= x_allocate_bitmap_record (f
);
377 dpyinfo
->bitmaps
[id
- 1].pixmap
= bitmap
;
378 dpyinfo
->bitmaps
[id
- 1].have_mask
= 0;
379 dpyinfo
->bitmaps
[id
- 1].refcount
= 1;
380 dpyinfo
->bitmaps
[id
- 1].file
= (char *) xmalloc (SBYTES (file
) + 1);
381 dpyinfo
->bitmaps
[id
- 1].depth
= 1;
382 dpyinfo
->bitmaps
[id
- 1].height
= height
;
383 dpyinfo
->bitmaps
[id
- 1].width
= width
;
384 strcpy (dpyinfo
->bitmaps
[id
- 1].file
, SSDATA (file
));
387 #endif /* HAVE_X_WINDOWS */
393 free_bitmap_record (Display_Info
*dpyinfo
, Bitmap_Record
*bm
)
395 #ifdef HAVE_X_WINDOWS
396 XFreePixmap (dpyinfo
->display
, bm
->pixmap
);
398 XFreePixmap (dpyinfo
->display
, bm
->mask
);
399 #endif /* HAVE_X_WINDOWS */
402 DeleteObject (bm
->pixmap
);
403 #endif /* HAVE_NTGUI */
406 ns_release_object (bm
->img
);
416 /* Remove reference to bitmap with id number ID. */
419 x_destroy_bitmap (FRAME_PTR f
, ptrdiff_t id
)
421 Display_Info
*dpyinfo
= FRAME_X_DISPLAY_INFO (f
);
425 Bitmap_Record
*bm
= &dpyinfo
->bitmaps
[id
- 1];
427 if (--bm
->refcount
== 0)
430 free_bitmap_record (dpyinfo
, bm
);
436 /* Free all the bitmaps for the display specified by DPYINFO. */
439 x_destroy_all_bitmaps (Display_Info
*dpyinfo
)
442 Bitmap_Record
*bm
= dpyinfo
->bitmaps
;
444 for (i
= 0; i
< dpyinfo
->bitmaps_last
; i
++, bm
++)
445 if (bm
->refcount
> 0)
446 free_bitmap_record (dpyinfo
, bm
);
448 dpyinfo
->bitmaps_last
= 0;
452 #ifdef HAVE_X_WINDOWS
454 /* Useful functions defined in the section
455 `Image type independent image structures' below. */
457 static unsigned long four_corners_best (XImagePtr ximg
,
460 unsigned long height
);
462 static int x_create_x_image_and_pixmap (struct frame
*f
, int width
, int height
,
463 int depth
, XImagePtr
*ximg
,
466 static void x_destroy_x_image (XImagePtr ximg
);
469 /* Create a mask of a bitmap. Note is this not a perfect mask.
470 It's nicer with some borders in this context */
473 x_create_bitmap_mask (struct frame
*f
, ptrdiff_t id
)
476 XImagePtr ximg
, mask_img
;
477 unsigned long width
, height
;
480 unsigned long x
, y
, xp
, xm
, yp
, ym
;
483 Display_Info
*dpyinfo
= FRAME_X_DISPLAY_INFO (f
);
488 pixmap
= x_bitmap_pixmap (f
, id
);
489 width
= x_bitmap_width (f
, id
);
490 height
= x_bitmap_height (f
, id
);
493 ximg
= XGetImage (FRAME_X_DISPLAY (f
), pixmap
, 0, 0, width
, height
,
502 result
= x_create_x_image_and_pixmap (f
, width
, height
, 1, &mask_img
, &mask
);
507 XDestroyImage (ximg
);
511 bg
= four_corners_best (ximg
, NULL
, width
, height
);
513 for (y
= 0; y
< ximg
->height
; ++y
)
515 for (x
= 0; x
< ximg
->width
; ++x
)
517 xp
= x
!= ximg
->width
- 1 ? x
+ 1 : 0;
518 xm
= x
!= 0 ? x
- 1 : ximg
->width
- 1;
519 yp
= y
!= ximg
->height
- 1 ? y
+ 1 : 0;
520 ym
= y
!= 0 ? y
- 1 : ximg
->height
- 1;
521 if (XGetPixel (ximg
, x
, y
) == bg
522 && XGetPixel (ximg
, x
, yp
) == bg
523 && XGetPixel (ximg
, x
, ym
) == bg
524 && XGetPixel (ximg
, xp
, y
) == bg
525 && XGetPixel (ximg
, xp
, yp
) == bg
526 && XGetPixel (ximg
, xp
, ym
) == bg
527 && XGetPixel (ximg
, xm
, y
) == bg
528 && XGetPixel (ximg
, xm
, yp
) == bg
529 && XGetPixel (ximg
, xm
, ym
) == bg
)
530 XPutPixel (mask_img
, x
, y
, 0);
532 XPutPixel (mask_img
, x
, y
, 1);
536 xassert (interrupt_input_blocked
);
537 gc
= XCreateGC (FRAME_X_DISPLAY (f
), mask
, 0, NULL
);
538 XPutImage (FRAME_X_DISPLAY (f
), mask
, gc
, mask_img
, 0, 0, 0, 0,
540 XFreeGC (FRAME_X_DISPLAY (f
), gc
);
542 dpyinfo
->bitmaps
[id
- 1].have_mask
= 1;
543 dpyinfo
->bitmaps
[id
- 1].mask
= mask
;
545 XDestroyImage (ximg
);
546 x_destroy_x_image (mask_img
);
551 #endif /* HAVE_X_WINDOWS */
554 /***********************************************************************
556 ***********************************************************************/
558 /* List of supported image types. Use define_image_type to add new
559 types. Use lookup_image_type to find a type for a given symbol. */
561 static struct image_type
*image_types
;
563 /* The symbol `xbm' which is used as the type symbol for XBM images. */
565 static Lisp_Object Qxbm
;
569 Lisp_Object QCascent
, QCmargin
, QCrelief
;
570 Lisp_Object QCconversion
;
571 static Lisp_Object QCheuristic_mask
;
572 static Lisp_Object QCcolor_symbols
;
573 static Lisp_Object QCindex
, QCmatrix
, QCcolor_adjustment
, QCmask
, QCgeometry
;
574 static Lisp_Object QCcrop
, QCrotation
;
578 static Lisp_Object Qcount
, Qextension_data
, Qdelay
;
579 static Lisp_Object Qlaplace
, Qemboss
, Qedge_detection
, Qheuristic
;
581 /* Function prototypes. */
583 static Lisp_Object
define_image_type (struct image_type
*type
, int loaded
);
584 static struct image_type
*lookup_image_type (Lisp_Object symbol
);
585 static void image_error (const char *format
, Lisp_Object
, Lisp_Object
);
586 static void x_laplace (struct frame
*, struct image
*);
587 static void x_emboss (struct frame
*, struct image
*);
588 static int x_build_heuristic_mask (struct frame
*, struct image
*,
591 #define CACHE_IMAGE_TYPE(type, status) \
592 do { Vlibrary_cache = Fcons (Fcons (type, status), Vlibrary_cache); } while (0)
594 #define CACHE_IMAGE_TYPE(type, status)
597 #define ADD_IMAGE_TYPE(type) \
598 do { Vimage_types = Fcons (type, Vimage_types); } while (0)
600 /* Define a new image type from TYPE. This adds a copy of TYPE to
601 image_types and caches the loading status of TYPE. */
604 define_image_type (struct image_type
*type
, int loaded
)
612 /* Make a copy of TYPE to avoid a bus error in a dumped Emacs.
613 The initialized data segment is read-only. */
614 struct image_type
*p
= (struct image_type
*) xmalloc (sizeof *p
);
615 memcpy (p
, type
, sizeof *p
);
616 p
->next
= image_types
;
621 CACHE_IMAGE_TYPE (*type
->type
, success
);
626 /* Look up image type SYMBOL, and return a pointer to its image_type
627 structure. Value is null if SYMBOL is not a known image type. */
629 static inline struct image_type
*
630 lookup_image_type (Lisp_Object symbol
)
632 struct image_type
*type
;
634 /* We must initialize the image-type if it hasn't been already. */
635 if (NILP (Finit_image_library (symbol
, Vdynamic_library_alist
)))
636 return 0; /* unimplemented */
638 for (type
= image_types
; type
; type
= type
->next
)
639 if (EQ (symbol
, *type
->type
))
646 /* Value is non-zero if OBJECT is a valid Lisp image specification. A
647 valid image specification is a list whose car is the symbol
648 `image', and whose rest is a property list. The property list must
649 contain a value for key `:type'. That value must be the name of a
650 supported image type. The rest of the property list depends on the
654 valid_image_p (Lisp_Object object
)
662 for (tem
= XCDR (object
); CONSP (tem
); tem
= XCDR (tem
))
663 if (EQ (XCAR (tem
), QCtype
))
666 if (CONSP (tem
) && SYMBOLP (XCAR (tem
)))
668 struct image_type
*type
;
669 type
= lookup_image_type (XCAR (tem
));
671 valid_p
= type
->valid_p (object
);
682 /* Log error message with format string FORMAT and argument ARG.
683 Signaling an error, e.g. when an image cannot be loaded, is not a
684 good idea because this would interrupt redisplay, and the error
685 message display would lead to another redisplay. This function
686 therefore simply displays a message. */
689 image_error (const char *format
, Lisp_Object arg1
, Lisp_Object arg2
)
691 add_to_log (format
, arg1
, arg2
);
696 /***********************************************************************
698 ***********************************************************************/
700 enum image_value_type
702 IMAGE_DONT_CHECK_VALUE_TYPE
,
704 IMAGE_STRING_OR_NIL_VALUE
,
706 IMAGE_POSITIVE_INTEGER_VALUE
,
707 IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR
,
708 IMAGE_NON_NEGATIVE_INTEGER_VALUE
,
711 IMAGE_FUNCTION_VALUE
,
716 /* Structure used when parsing image specifications. */
720 /* Name of keyword. */
723 /* The type of value allowed. */
724 enum image_value_type type
;
726 /* Non-zero means key must be present. */
729 /* Used to recognize duplicate keywords in a property list. */
732 /* The value that was found. */
737 static int parse_image_spec (Lisp_Object
, struct image_keyword
*,
739 static Lisp_Object
image_spec_value (Lisp_Object
, Lisp_Object
, int *);
742 /* Parse image spec SPEC according to KEYWORDS. A valid image spec
743 has the format (image KEYWORD VALUE ...). One of the keyword/
744 value pairs must be `:type TYPE'. KEYWORDS is a vector of
745 image_keywords structures of size NKEYWORDS describing other
746 allowed keyword/value pairs. Value is non-zero if SPEC is valid. */
749 parse_image_spec (Lisp_Object spec
, struct image_keyword
*keywords
,
750 int nkeywords
, Lisp_Object type
)
759 while (CONSP (plist
))
761 Lisp_Object key
, value
;
763 /* First element of a pair must be a symbol. */
765 plist
= XCDR (plist
);
769 /* There must follow a value. */
772 value
= XCAR (plist
);
773 plist
= XCDR (plist
);
775 /* Find key in KEYWORDS. Error if not found. */
776 for (i
= 0; i
< nkeywords
; ++i
)
777 if (strcmp (keywords
[i
].name
, SSDATA (SYMBOL_NAME (key
))) == 0)
783 /* Record that we recognized the keyword. If a keywords
784 was found more than once, it's an error. */
785 keywords
[i
].value
= value
;
788 if (keywords
[i
].count
> 1)
791 /* Check type of value against allowed type. */
792 switch (keywords
[i
].type
)
794 case IMAGE_STRING_VALUE
:
795 if (!STRINGP (value
))
799 case IMAGE_STRING_OR_NIL_VALUE
:
800 if (!STRINGP (value
) && !NILP (value
))
804 case IMAGE_SYMBOL_VALUE
:
805 if (!SYMBOLP (value
))
809 case IMAGE_POSITIVE_INTEGER_VALUE
:
810 if (!INTEGERP (value
) || XINT (value
) <= 0)
814 case IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR
:
815 if (INTEGERP (value
) && XINT (value
) >= 0)
818 && INTEGERP (XCAR (value
)) && INTEGERP (XCDR (value
))
819 && XINT (XCAR (value
)) >= 0 && XINT (XCDR (value
)) >= 0)
823 case IMAGE_ASCENT_VALUE
:
824 if (SYMBOLP (value
) && EQ (value
, Qcenter
))
826 else if (INTEGERP (value
)
828 && XINT (value
) <= 100)
832 case IMAGE_NON_NEGATIVE_INTEGER_VALUE
:
833 if (!INTEGERP (value
) || XINT (value
) < 0)
837 case IMAGE_DONT_CHECK_VALUE_TYPE
:
840 case IMAGE_FUNCTION_VALUE
:
841 value
= indirect_function (value
);
842 if (!NILP (Ffunctionp (value
)))
846 case IMAGE_NUMBER_VALUE
:
847 if (!INTEGERP (value
) && !FLOATP (value
))
851 case IMAGE_INTEGER_VALUE
:
852 if (!INTEGERP (value
))
856 case IMAGE_BOOL_VALUE
:
857 if (!NILP (value
) && !EQ (value
, Qt
))
866 if (EQ (key
, QCtype
) && !EQ (type
, value
))
870 /* Check that all mandatory fields are present. */
871 for (i
= 0; i
< nkeywords
; ++i
)
872 if (keywords
[i
].mandatory_p
&& keywords
[i
].count
== 0)
879 /* Return the value of KEY in image specification SPEC. Value is nil
880 if KEY is not present in SPEC. if FOUND is not null, set *FOUND
881 to 1 if KEY was found in SPEC, set it to 0 otherwise. */
884 image_spec_value (Lisp_Object spec
, Lisp_Object key
, int *found
)
888 xassert (valid_image_p (spec
));
890 for (tail
= XCDR (spec
);
891 CONSP (tail
) && CONSP (XCDR (tail
));
892 tail
= XCDR (XCDR (tail
)))
894 if (EQ (XCAR (tail
), key
))
898 return XCAR (XCDR (tail
));
908 DEFUN ("image-size", Fimage_size
, Simage_size
, 1, 3, 0,
909 doc
: /* Return the size of image SPEC as pair (WIDTH . HEIGHT).
910 PIXELS non-nil means return the size in pixels, otherwise return the
911 size in canonical character units.
912 FRAME is the frame on which the image will be displayed. FRAME nil
913 or omitted means use the selected frame. */)
914 (Lisp_Object spec
, Lisp_Object pixels
, Lisp_Object frame
)
919 if (valid_image_p (spec
))
921 struct frame
*f
= check_x_frame (frame
);
922 int id
= lookup_image (f
, spec
);
923 struct image
*img
= IMAGE_FROM_ID (f
, id
);
924 int width
= img
->width
+ 2 * img
->hmargin
;
925 int height
= img
->height
+ 2 * img
->vmargin
;
928 size
= Fcons (make_float ((double) width
/ FRAME_COLUMN_WIDTH (f
)),
929 make_float ((double) height
/ FRAME_LINE_HEIGHT (f
)));
931 size
= Fcons (make_number (width
), make_number (height
));
934 error ("Invalid image specification");
940 DEFUN ("image-mask-p", Fimage_mask_p
, Simage_mask_p
, 1, 2, 0,
941 doc
: /* Return t if image SPEC has a mask bitmap.
942 FRAME is the frame on which the image will be displayed. FRAME nil
943 or omitted means use the selected frame. */)
944 (Lisp_Object spec
, Lisp_Object frame
)
949 if (valid_image_p (spec
))
951 struct frame
*f
= check_x_frame (frame
);
952 int id
= lookup_image (f
, spec
);
953 struct image
*img
= IMAGE_FROM_ID (f
, id
);
958 error ("Invalid image specification");
963 DEFUN ("image-metadata", Fimage_metadata
, Simage_metadata
, 1, 2, 0,
964 doc
: /* Return metadata for image SPEC.
965 FRAME is the frame on which the image will be displayed. FRAME nil
966 or omitted means use the selected frame. */)
967 (Lisp_Object spec
, Lisp_Object frame
)
972 if (valid_image_p (spec
))
974 struct frame
*f
= check_x_frame (frame
);
975 int id
= lookup_image (f
, spec
);
976 struct image
*img
= IMAGE_FROM_ID (f
, id
);
977 ext
= img
->lisp_data
;
984 /***********************************************************************
985 Image type independent image structures
986 ***********************************************************************/
988 static void free_image (struct frame
*f
, struct image
*img
);
990 #define MAX_IMAGE_SIZE 6.0
991 /* Allocate and return a new image structure for image specification
992 SPEC. SPEC has a hash value of HASH. */
994 static struct image
*
995 make_image (Lisp_Object spec
, EMACS_UINT hash
)
997 struct image
*img
= (struct image
*) xmalloc (sizeof *img
);
998 Lisp_Object file
= image_spec_value (spec
, QCfile
, NULL
);
1000 xassert (valid_image_p (spec
));
1001 memset (img
, 0, sizeof *img
);
1002 img
->dependencies
= NILP (file
) ? Qnil
: list1 (file
);
1003 img
->type
= lookup_image_type (image_spec_value (spec
, QCtype
, NULL
));
1004 xassert (img
->type
!= NULL
);
1006 img
->lisp_data
= Qnil
;
1007 img
->ascent
= DEFAULT_IMAGE_ASCENT
;
1009 img
->corners
[BOT_CORNER
] = -1; /* Full image */
1014 /* Free image IMG which was used on frame F, including its resources. */
1017 free_image (struct frame
*f
, struct image
*img
)
1021 struct image_cache
*c
= FRAME_IMAGE_CACHE (f
);
1023 /* Remove IMG from the hash table of its cache. */
1025 img
->prev
->next
= img
->next
;
1027 c
->buckets
[img
->hash
% IMAGE_CACHE_BUCKETS_SIZE
] = img
->next
;
1030 img
->next
->prev
= img
->prev
;
1032 c
->images
[img
->id
] = NULL
;
1034 /* Free resources, then free IMG. */
1035 img
->type
->free (f
, img
);
1040 /* Return 1 if the given widths and heights are valid for display;
1041 otherwise, return 0. */
1044 check_image_size (struct frame
*f
, int width
, int height
)
1048 if (width
<= 0 || height
<= 0)
1051 if (INTEGERP (Vmax_image_size
))
1052 return (width
<= XINT (Vmax_image_size
)
1053 && height
<= XINT (Vmax_image_size
));
1054 else if (FLOATP (Vmax_image_size
))
1057 w
= FRAME_PIXEL_WIDTH (f
);
1058 h
= FRAME_PIXEL_HEIGHT (f
);
1059 return (width
<= XFLOAT_DATA (Vmax_image_size
) * w
1060 && height
<= XFLOAT_DATA (Vmax_image_size
) * h
);
1066 /* Prepare image IMG for display on frame F. Must be called before
1067 drawing an image. */
1070 prepare_image_for_display (struct frame
*f
, struct image
*img
)
1074 /* We're about to display IMG, so set its timestamp to `now'. */
1076 img
->timestamp
= EMACS_SECS (t
);
1078 /* If IMG doesn't have a pixmap yet, load it now, using the image
1079 type dependent loader function. */
1080 if (img
->pixmap
== NO_PIXMAP
&& !img
->load_failed_p
)
1081 img
->load_failed_p
= img
->type
->load (f
, img
) == 0;
1086 /* Value is the number of pixels for the ascent of image IMG when
1087 drawn in face FACE. */
1090 image_ascent (struct image
*img
, struct face
*face
, struct glyph_slice
*slice
)
1095 if (slice
->height
== img
->height
)
1096 height
= img
->height
+ img
->vmargin
;
1097 else if (slice
->y
== 0)
1098 height
= slice
->height
+ img
->vmargin
;
1100 height
= slice
->height
;
1102 if (img
->ascent
== CENTERED_IMAGE_ASCENT
)
1107 /* W32 specific version. Why?. ++kfs */
1108 ascent
= height
/ 2 - (FONT_DESCENT (face
->font
)
1109 - FONT_BASE (face
->font
)) / 2;
1111 /* This expression is arranged so that if the image can't be
1112 exactly centered, it will be moved slightly up. This is
1113 because a typical font is `top-heavy' (due to the presence
1114 uppercase letters), so the image placement should err towards
1115 being top-heavy too. It also just generally looks better. */
1116 ascent
= (height
+ FONT_BASE(face
->font
)
1117 - FONT_DESCENT(face
->font
) + 1) / 2;
1118 #endif /* HAVE_NTGUI */
1121 ascent
= height
/ 2;
1124 ascent
= (int) (height
* img
->ascent
/ 100.0);
1130 /* Image background colors. */
1132 /* Find the "best" corner color of a bitmap.
1133 On W32, XIMG is assumed to a device context with the bitmap selected. */
1135 static RGB_PIXEL_COLOR
1136 four_corners_best (XImagePtr_or_DC ximg
, int *corners
,
1137 unsigned long width
, unsigned long height
)
1139 RGB_PIXEL_COLOR corner_pixels
[4], best
IF_LINT (= 0);
1142 if (corners
&& corners
[BOT_CORNER
] >= 0)
1144 /* Get the colors at the corner_pixels of ximg. */
1145 corner_pixels
[0] = GET_PIXEL (ximg
, corners
[LEFT_CORNER
], corners
[TOP_CORNER
]);
1146 corner_pixels
[1] = GET_PIXEL (ximg
, corners
[RIGHT_CORNER
] - 1, corners
[TOP_CORNER
]);
1147 corner_pixels
[2] = GET_PIXEL (ximg
, corners
[RIGHT_CORNER
] - 1, corners
[BOT_CORNER
] - 1);
1148 corner_pixels
[3] = GET_PIXEL (ximg
, corners
[LEFT_CORNER
], corners
[BOT_CORNER
] - 1);
1152 /* Get the colors at the corner_pixels of ximg. */
1153 corner_pixels
[0] = GET_PIXEL (ximg
, 0, 0);
1154 corner_pixels
[1] = GET_PIXEL (ximg
, width
- 1, 0);
1155 corner_pixels
[2] = GET_PIXEL (ximg
, width
- 1, height
- 1);
1156 corner_pixels
[3] = GET_PIXEL (ximg
, 0, height
- 1);
1158 /* Choose the most frequently found color as background. */
1159 for (i
= best_count
= 0; i
< 4; ++i
)
1163 for (j
= n
= 0; j
< 4; ++j
)
1164 if (corner_pixels
[i
] == corner_pixels
[j
])
1168 best
= corner_pixels
[i
], best_count
= n
;
1174 /* Portability macros */
1178 #define Destroy_Image(img_dc, prev) \
1179 do { SelectObject (img_dc, prev); DeleteDC (img_dc); } while (0)
1181 #define Free_Pixmap(display, pixmap) \
1182 DeleteObject (pixmap)
1184 #elif defined (HAVE_NS)
1186 #define Destroy_Image(ximg, dummy) \
1187 ns_release_object (ximg)
1189 #define Free_Pixmap(display, pixmap) \
1190 ns_release_object (pixmap)
1194 #define Destroy_Image(ximg, dummy) \
1195 XDestroyImage (ximg)
1197 #define Free_Pixmap(display, pixmap) \
1198 XFreePixmap (display, pixmap)
1200 #endif /* !HAVE_NTGUI && !HAVE_NS */
1203 /* Return the `background' field of IMG. If IMG doesn't have one yet,
1204 it is guessed heuristically. If non-zero, XIMG is an existing
1205 XImage object (or device context with the image selected on W32) to
1206 use for the heuristic. */
1209 image_background (struct image
*img
, struct frame
*f
, XImagePtr_or_DC ximg
)
1211 if (! img
->background_valid
)
1212 /* IMG doesn't have a background yet, try to guess a reasonable value. */
1214 int free_ximg
= !ximg
;
1217 #endif /* HAVE_NTGUI */
1222 ximg
= XGetImage (FRAME_X_DISPLAY (f
), img
->pixmap
,
1223 0, 0, img
->width
, img
->height
, ~0, ZPixmap
);
1225 HDC frame_dc
= get_frame_dc (f
);
1226 ximg
= CreateCompatibleDC (frame_dc
);
1227 release_frame_dc (f
, frame_dc
);
1228 prev
= SelectObject (ximg
, img
->pixmap
);
1229 #endif /* !HAVE_NTGUI */
1232 img
->background
= four_corners_best (ximg
, img
->corners
, img
->width
, img
->height
);
1235 Destroy_Image (ximg
, prev
);
1237 img
->background_valid
= 1;
1240 return img
->background
;
1243 /* Return the `background_transparent' field of IMG. If IMG doesn't
1244 have one yet, it is guessed heuristically. If non-zero, MASK is an
1245 existing XImage object to use for the heuristic. */
1248 image_background_transparent (struct image
*img
, struct frame
*f
, XImagePtr_or_DC mask
)
1250 if (! img
->background_transparent_valid
)
1251 /* IMG doesn't have a background yet, try to guess a reasonable value. */
1255 int free_mask
= !mask
;
1258 #endif /* HAVE_NTGUI */
1263 mask
= XGetImage (FRAME_X_DISPLAY (f
), img
->mask
,
1264 0, 0, img
->width
, img
->height
, ~0, ZPixmap
);
1266 HDC frame_dc
= get_frame_dc (f
);
1267 mask
= CreateCompatibleDC (frame_dc
);
1268 release_frame_dc (f
, frame_dc
);
1269 prev
= SelectObject (mask
, img
->mask
);
1270 #endif /* HAVE_NTGUI */
1273 img
->background_transparent
1274 = (four_corners_best (mask
, img
->corners
, img
->width
, img
->height
) == PIX_MASK_RETAIN
);
1277 Destroy_Image (mask
, prev
);
1280 img
->background_transparent
= 0;
1282 img
->background_transparent_valid
= 1;
1285 return img
->background_transparent
;
1289 /***********************************************************************
1290 Helper functions for X image types
1291 ***********************************************************************/
1293 static void x_clear_image_1 (struct frame
*, struct image
*, int,
1295 static void x_clear_image (struct frame
*f
, struct image
*img
);
1296 static unsigned long x_alloc_image_color (struct frame
*f
,
1298 Lisp_Object color_name
,
1299 unsigned long dflt
);
1302 /* Clear X resources of image IMG on frame F. PIXMAP_P non-zero means
1303 free the pixmap if any. MASK_P non-zero means clear the mask
1304 pixmap if any. COLORS_P non-zero means free colors allocated for
1305 the image, if any. */
1308 x_clear_image_1 (struct frame
*f
, struct image
*img
, int pixmap_p
, int mask_p
,
1311 if (pixmap_p
&& img
->pixmap
)
1313 Free_Pixmap (FRAME_X_DISPLAY (f
), img
->pixmap
);
1314 img
->pixmap
= NO_PIXMAP
;
1315 /* NOTE (HAVE_NS): background color is NOT an indexed color! */
1316 img
->background_valid
= 0;
1319 if (mask_p
&& img
->mask
)
1321 Free_Pixmap (FRAME_X_DISPLAY (f
), img
->mask
);
1322 img
->mask
= NO_PIXMAP
;
1323 img
->background_transparent_valid
= 0;
1326 if (colors_p
&& img
->ncolors
)
1328 /* W32_TODO: color table support. */
1329 #ifdef HAVE_X_WINDOWS
1330 x_free_colors (f
, img
->colors
, img
->ncolors
);
1331 #endif /* HAVE_X_WINDOWS */
1332 xfree (img
->colors
);
1339 /* Free X resources of image IMG which is used on frame F. */
1342 x_clear_image (struct frame
*f
, struct image
*img
)
1345 x_clear_image_1 (f
, img
, 1, 1, 1);
1350 /* Allocate color COLOR_NAME for image IMG on frame F. If color
1351 cannot be allocated, use DFLT. Add a newly allocated color to
1352 IMG->colors, so that it can be freed again. Value is the pixel
1355 static unsigned long
1356 x_alloc_image_color (struct frame
*f
, struct image
*img
, Lisp_Object color_name
,
1360 unsigned long result
;
1362 xassert (STRINGP (color_name
));
1364 if (x_defined_color (f
, SSDATA (color_name
), &color
, 1)
1365 && img
->ncolors
< min (min (PTRDIFF_MAX
, SIZE_MAX
) / sizeof *img
->colors
,
1368 /* This isn't called frequently so we get away with simply
1369 reallocating the color vector to the needed size, here. */
1372 (unsigned long *) xrealloc (img
->colors
,
1373 img
->ncolors
* sizeof *img
->colors
);
1374 img
->colors
[img
->ncolors
- 1] = color
.pixel
;
1375 result
= color
.pixel
;
1385 /***********************************************************************
1387 ***********************************************************************/
1389 static void cache_image (struct frame
*f
, struct image
*img
);
1390 static void postprocess_image (struct frame
*, struct image
*);
1392 /* Return a new, initialized image cache that is allocated from the
1393 heap. Call free_image_cache to free an image cache. */
1395 struct image_cache
*
1396 make_image_cache (void)
1398 struct image_cache
*c
= (struct image_cache
*) xmalloc (sizeof *c
);
1401 memset (c
, 0, sizeof *c
);
1403 c
->images
= (struct image
**) xmalloc (c
->size
* sizeof *c
->images
);
1404 size
= IMAGE_CACHE_BUCKETS_SIZE
* sizeof *c
->buckets
;
1405 c
->buckets
= (struct image
**) xmalloc (size
);
1406 memset (c
->buckets
, 0, size
);
1411 /* Find an image matching SPEC in the cache, and return it. If no
1412 image is found, return NULL. */
1413 static struct image
*
1414 search_image_cache (struct frame
*f
, Lisp_Object spec
, EMACS_UINT hash
)
1417 struct image_cache
*c
= FRAME_IMAGE_CACHE (f
);
1418 int i
= hash
% IMAGE_CACHE_BUCKETS_SIZE
;
1420 if (!c
) return NULL
;
1422 /* If the image spec does not specify a background color, the cached
1423 image must have the same background color as the current frame.
1424 The foreground color must also match, for the sake of monochrome
1427 In fact, we could ignore the foreground color matching condition
1428 for color images, or if the image spec specifies :foreground;
1429 similarly we could ignore the background color matching condition
1430 for formats that don't use transparency (such as jpeg), or if the
1431 image spec specifies :background. However, the extra memory
1432 usage is probably negligible in practice, so we don't bother. */
1434 for (img
= c
->buckets
[i
]; img
; img
= img
->next
)
1435 if (img
->hash
== hash
1436 && !NILP (Fequal (img
->spec
, spec
))
1437 && img
->frame_foreground
== FRAME_FOREGROUND_PIXEL (f
)
1438 && img
->frame_background
== FRAME_BACKGROUND_PIXEL (f
))
1444 /* Search frame F for an image with spec SPEC, and free it. */
1447 uncache_image (struct frame
*f
, Lisp_Object spec
)
1449 struct image
*img
= search_image_cache (f
, spec
, sxhash (spec
, 0));
1452 free_image (f
, img
);
1453 /* As display glyphs may still be referring to the image ID, we
1454 must garbage the frame (Bug#6426). */
1455 SET_FRAME_GARBAGED (f
);
1460 /* Free image cache of frame F. Be aware that X frames share images
1464 free_image_cache (struct frame
*f
)
1466 struct image_cache
*c
= FRAME_IMAGE_CACHE (f
);
1471 /* Cache should not be referenced by any frame when freed. */
1472 xassert (c
->refcount
== 0);
1474 for (i
= 0; i
< c
->used
; ++i
)
1475 free_image (f
, c
->images
[i
]);
1479 FRAME_IMAGE_CACHE (f
) = NULL
;
1484 /* Clear image cache of frame F. FILTER=t means free all images.
1485 FILTER=nil means clear only images that haven't been
1486 displayed for some time.
1487 Else, only free the images which have FILTER in their `dependencies'.
1488 Should be called from time to time to reduce the number of loaded images.
1489 If image-cache-eviction-delay is non-nil, this frees images in the cache
1490 which weren't displayed for at least that many seconds. */
1493 clear_image_cache (struct frame
*f
, Lisp_Object filter
)
1495 struct image_cache
*c
= FRAME_IMAGE_CACHE (f
);
1501 /* Block input so that we won't be interrupted by a SIGIO
1502 while being in an inconsistent state. */
1507 /* Filter image cache. */
1508 for (i
= 0; i
< c
->used
; ++i
)
1510 struct image
*img
= c
->images
[i
];
1511 if (img
&& (EQ (Qt
, filter
)
1512 || !NILP (Fmember (filter
, img
->dependencies
))))
1514 free_image (f
, img
);
1519 else if (INTEGERP (Vimage_cache_eviction_delay
))
1521 /* Free cache based on timestamp. */
1524 int delay
, nimages
= 0;
1526 for (i
= 0; i
< c
->used
; ++i
)
1530 /* If the number of cached images has grown unusually large,
1531 decrease the cache eviction delay (Bug#6230). */
1532 delay
= XFASTINT (Vimage_cache_eviction_delay
);
1534 delay
= max (1, 1600 * delay
/ (nimages
*nimages
));
1537 old
= EMACS_SECS (t
) - delay
;
1539 for (i
= 0; i
< c
->used
; ++i
)
1541 struct image
*img
= c
->images
[i
];
1542 if (img
&& img
->timestamp
< old
)
1544 free_image (f
, img
);
1550 /* We may be clearing the image cache because, for example,
1551 Emacs was iconified for a longer period of time. In that
1552 case, current matrices may still contain references to
1553 images freed above. So, clear these matrices. */
1556 Lisp_Object tail
, frame
;
1558 FOR_EACH_FRAME (tail
, frame
)
1560 struct frame
*fr
= XFRAME (frame
);
1561 if (FRAME_IMAGE_CACHE (fr
) == c
)
1562 clear_current_matrices (fr
);
1565 ++windows_or_buffers_changed
;
1573 clear_image_caches (Lisp_Object filter
)
1575 /* FIXME: We want to do
1576 * struct terminal *t;
1577 * for (t = terminal_list; t; t = t->next_terminal)
1578 * clear_image_cache (t, filter); */
1579 Lisp_Object tail
, frame
;
1580 FOR_EACH_FRAME (tail
, frame
)
1581 if (FRAME_WINDOW_P (XFRAME (frame
)))
1582 clear_image_cache (XFRAME (frame
), filter
);
1585 DEFUN ("clear-image-cache", Fclear_image_cache
, Sclear_image_cache
,
1587 doc
: /* Clear the image cache.
1588 FILTER nil or a frame means clear all images in the selected frame.
1589 FILTER t means clear the image caches of all frames.
1590 Anything else, means only clear those images which refer to FILTER,
1591 which is then usually a filename. */)
1592 (Lisp_Object filter
)
1594 if (!(EQ (filter
, Qnil
) || FRAMEP (filter
)))
1595 clear_image_caches (filter
);
1597 clear_image_cache (check_x_frame (filter
), Qt
);
1603 DEFUN ("image-flush", Fimage_flush
, Simage_flush
,
1605 doc
: /* Fush the image with specification SPEC on frame FRAME.
1606 This removes the image from the Emacs image cache. If SPEC specifies
1607 an image file, the next redisplay of this image will read from the
1608 current contents of that file.
1610 FRAME nil or omitted means use the selected frame.
1611 FRAME t means refresh the image on all frames. */)
1612 (Lisp_Object spec
, Lisp_Object frame
)
1614 if (!valid_image_p (spec
))
1615 error ("Invalid image specification");
1620 FOR_EACH_FRAME (tail
, frame
)
1622 struct frame
*f
= XFRAME (frame
);
1623 if (FRAME_WINDOW_P (f
))
1624 uncache_image (f
, spec
);
1628 uncache_image (check_x_frame (frame
), spec
);
1634 /* Compute masks and transform image IMG on frame F, as specified
1635 by the image's specification, */
1638 postprocess_image (struct frame
*f
, struct image
*img
)
1640 /* Manipulation of the image's mask. */
1643 Lisp_Object conversion
, spec
;
1648 /* `:heuristic-mask t'
1650 means build a mask heuristically.
1651 `:heuristic-mask (R G B)'
1652 `:mask (heuristic (R G B))'
1653 means build a mask from color (R G B) in the
1656 means remove a mask, if any. */
1658 mask
= image_spec_value (spec
, QCheuristic_mask
, NULL
);
1660 x_build_heuristic_mask (f
, img
, mask
);
1665 mask
= image_spec_value (spec
, QCmask
, &found_p
);
1667 if (EQ (mask
, Qheuristic
))
1668 x_build_heuristic_mask (f
, img
, Qt
);
1669 else if (CONSP (mask
)
1670 && EQ (XCAR (mask
), Qheuristic
))
1672 if (CONSP (XCDR (mask
)))
1673 x_build_heuristic_mask (f
, img
, XCAR (XCDR (mask
)));
1675 x_build_heuristic_mask (f
, img
, XCDR (mask
));
1677 else if (NILP (mask
) && found_p
&& img
->mask
)
1679 Free_Pixmap (FRAME_X_DISPLAY (f
), img
->mask
);
1680 img
->mask
= NO_PIXMAP
;
1685 /* Should we apply an image transformation algorithm? */
1686 conversion
= image_spec_value (spec
, QCconversion
, NULL
);
1687 if (EQ (conversion
, Qdisabled
))
1688 x_disable_image (f
, img
);
1689 else if (EQ (conversion
, Qlaplace
))
1691 else if (EQ (conversion
, Qemboss
))
1693 else if (CONSP (conversion
)
1694 && EQ (XCAR (conversion
), Qedge_detection
))
1697 tem
= XCDR (conversion
);
1699 x_edge_detection (f
, img
,
1700 Fplist_get (tem
, QCmatrix
),
1701 Fplist_get (tem
, QCcolor_adjustment
));
1707 /* Return the id of image with Lisp specification SPEC on frame F.
1708 SPEC must be a valid Lisp image specification (see valid_image_p). */
1711 lookup_image (struct frame
*f
, Lisp_Object spec
)
1717 /* F must be a window-system frame, and SPEC must be a valid image
1719 xassert (FRAME_WINDOW_P (f
));
1720 xassert (valid_image_p (spec
));
1722 /* Look up SPEC in the hash table of the image cache. */
1723 hash
= sxhash (spec
, 0);
1724 img
= search_image_cache (f
, spec
, hash
);
1725 if (img
&& img
->load_failed_p
)
1727 free_image (f
, img
);
1731 /* If not found, create a new image and cache it. */
1735 img
= make_image (spec
, hash
);
1736 cache_image (f
, img
);
1737 img
->load_failed_p
= img
->type
->load (f
, img
) == 0;
1738 img
->frame_foreground
= FRAME_FOREGROUND_PIXEL (f
);
1739 img
->frame_background
= FRAME_BACKGROUND_PIXEL (f
);
1741 /* If we can't load the image, and we don't have a width and
1742 height, use some arbitrary width and height so that we can
1743 draw a rectangle for it. */
1744 if (img
->load_failed_p
)
1748 value
= image_spec_value (spec
, QCwidth
, NULL
);
1749 img
->width
= (INTEGERP (value
)
1750 ? XFASTINT (value
) : DEFAULT_IMAGE_WIDTH
);
1751 value
= image_spec_value (spec
, QCheight
, NULL
);
1752 img
->height
= (INTEGERP (value
)
1753 ? XFASTINT (value
) : DEFAULT_IMAGE_HEIGHT
);
1757 /* Handle image type independent image attributes
1758 `:ascent ASCENT', `:margin MARGIN', `:relief RELIEF',
1759 `:background COLOR'. */
1760 Lisp_Object ascent
, margin
, relief
, bg
;
1762 ascent
= image_spec_value (spec
, QCascent
, NULL
);
1763 if (INTEGERP (ascent
))
1764 img
->ascent
= XFASTINT (ascent
);
1765 else if (EQ (ascent
, Qcenter
))
1766 img
->ascent
= CENTERED_IMAGE_ASCENT
;
1768 margin
= image_spec_value (spec
, QCmargin
, NULL
);
1769 if (INTEGERP (margin
) && XINT (margin
) >= 0)
1770 img
->vmargin
= img
->hmargin
= XFASTINT (margin
);
1771 else if (CONSP (margin
) && INTEGERP (XCAR (margin
))
1772 && INTEGERP (XCDR (margin
)))
1774 if (XINT (XCAR (margin
)) > 0)
1775 img
->hmargin
= XFASTINT (XCAR (margin
));
1776 if (XINT (XCDR (margin
)) > 0)
1777 img
->vmargin
= XFASTINT (XCDR (margin
));
1780 relief
= image_spec_value (spec
, QCrelief
, NULL
);
1781 if (INTEGERP (relief
))
1783 img
->relief
= XINT (relief
);
1784 img
->hmargin
+= eabs (img
->relief
);
1785 img
->vmargin
+= eabs (img
->relief
);
1788 if (! img
->background_valid
)
1790 bg
= image_spec_value (img
->spec
, QCbackground
, NULL
);
1794 = x_alloc_image_color (f
, img
, bg
,
1795 FRAME_BACKGROUND_PIXEL (f
));
1796 img
->background_valid
= 1;
1800 /* Do image transformations and compute masks, unless we
1801 don't have the image yet. */
1802 if (!EQ (*img
->type
->type
, Qpostscript
))
1803 postprocess_image (f
, img
);
1809 /* We're using IMG, so set its timestamp to `now'. */
1810 EMACS_GET_TIME (now
);
1811 img
->timestamp
= EMACS_SECS (now
);
1813 /* Value is the image id. */
1818 /* Cache image IMG in the image cache of frame F. */
1821 cache_image (struct frame
*f
, struct image
*img
)
1823 struct image_cache
*c
= FRAME_IMAGE_CACHE (f
);
1826 /* Find a free slot in c->images. */
1827 for (i
= 0; i
< c
->used
; ++i
)
1828 if (c
->images
[i
] == NULL
)
1831 /* If no free slot found, maybe enlarge c->images. */
1832 if (i
== c
->used
&& c
->used
== c
->size
)
1834 if (min (PTRDIFF_MAX
, SIZE_MAX
) / sizeof *c
->images
/ 2 < c
->size
)
1835 memory_full (SIZE_MAX
);
1837 c
->images
= (struct image
**) xrealloc (c
->images
,
1838 c
->size
* sizeof *c
->images
);
1841 /* Add IMG to c->images, and assign IMG an id. */
1847 /* Add IMG to the cache's hash table. */
1848 i
= img
->hash
% IMAGE_CACHE_BUCKETS_SIZE
;
1849 img
->next
= c
->buckets
[i
];
1851 img
->next
->prev
= img
;
1853 c
->buckets
[i
] = img
;
1857 /* Call FN on every image in the image cache of frame F. Used to mark
1858 Lisp Objects in the image cache. */
1860 /* Mark Lisp objects in image IMG. */
1863 mark_image (struct image
*img
)
1865 mark_object (img
->spec
);
1866 mark_object (img
->dependencies
);
1868 if (!NILP (img
->lisp_data
))
1869 mark_object (img
->lisp_data
);
1874 mark_image_cache (struct image_cache
*c
)
1879 for (i
= 0; i
< c
->used
; ++i
)
1881 mark_image (c
->images
[i
]);
1887 /***********************************************************************
1888 X / NS / W32 support code
1889 ***********************************************************************/
1893 /* Macro for defining functions that will be loaded from image DLLs. */
1894 #define DEF_IMGLIB_FN(rettype,func,args) static rettype (FAR CDECL *fn_##func)args
1896 /* Macro for loading those image functions from the library. */
1897 #define LOAD_IMGLIB_FN(lib,func) { \
1898 fn_##func = (void *) GetProcAddress (lib, #func); \
1899 if (!fn_##func) return 0; \
1902 #endif /* HAVE_NTGUI */
1904 static int x_create_x_image_and_pixmap (struct frame
*, int, int, int,
1905 XImagePtr
*, Pixmap
*);
1906 static void x_destroy_x_image (XImagePtr
);
1907 static void x_put_x_image (struct frame
*, XImagePtr
, Pixmap
, int, int);
1909 /* Return nonzero if XIMG's size WIDTH x HEIGHT doesn't break X.
1910 WIDTH and HEIGHT must both be positive.
1911 If XIMG is null, assume it is a bitmap. */
1913 x_check_image_size (XImagePtr ximg
, int width
, int height
)
1915 /* Respect Xlib's limits: it cannot deal with images that have more
1916 than INT_MAX (and/or UINT_MAX) bytes. And respect Emacs's limits
1917 of PTRDIFF_MAX (and/or SIZE_MAX) bytes for any object. For now,
1918 assume all windowing systems have the same limits that X does. */
1921 XLIB_BYTES_MAX
= min (INT_MAX
, UINT_MAX
),
1922 X_IMAGE_BYTES_MAX
= min (XLIB_BYTES_MAX
, min (PTRDIFF_MAX
, SIZE_MAX
))
1925 int bitmap_pad
, depth
, bytes_per_line
;
1928 bitmap_pad
= ximg
->bitmap_pad
;
1929 depth
= ximg
->depth
;
1930 bytes_per_line
= ximg
->bytes_per_line
;
1936 bytes_per_line
= (width
>> 3) + ((width
& 7) != 0);
1938 return (width
<= (INT_MAX
- (bitmap_pad
- 1)) / depth
1939 && height
<= X_IMAGE_BYTES_MAX
/ bytes_per_line
);
1942 /* Create an XImage and a pixmap of size WIDTH x HEIGHT for use on
1943 frame F. Set *XIMG and *PIXMAP to the XImage and Pixmap created.
1944 Set (*XIMG)->data to a raster of WIDTH x HEIGHT pixels allocated
1945 via xmalloc. Print error messages via image_error if an error
1946 occurs. Value is non-zero if successful.
1948 On W32, a DEPTH of zero signifies a 24 bit image, otherwise DEPTH
1949 should indicate the bit depth of the image. */
1952 x_create_x_image_and_pixmap (struct frame
*f
, int width
, int height
, int depth
,
1953 XImagePtr
*ximg
, Pixmap
*pixmap
)
1955 #ifdef HAVE_X_WINDOWS
1956 Display
*display
= FRAME_X_DISPLAY (f
);
1957 Window window
= FRAME_X_WINDOW (f
);
1958 Screen
*screen
= FRAME_X_SCREEN (f
);
1960 xassert (interrupt_input_blocked
);
1963 depth
= DefaultDepthOfScreen (screen
);
1964 *ximg
= XCreateImage (display
, DefaultVisualOfScreen (screen
),
1965 depth
, ZPixmap
, 0, NULL
, width
, height
,
1966 depth
> 16 ? 32 : depth
> 8 ? 16 : 8, 0);
1969 image_error ("Unable to allocate X image", Qnil
, Qnil
);
1973 if (! x_check_image_size (*ximg
, width
, height
))
1975 x_destroy_x_image (*ximg
);
1977 image_error ("Image too large (%dx%d)",
1978 make_number (width
), make_number (height
));
1982 /* Allocate image raster. */
1983 (*ximg
)->data
= (char *) xmalloc ((*ximg
)->bytes_per_line
* height
);
1985 /* Allocate a pixmap of the same size. */
1986 *pixmap
= XCreatePixmap (display
, window
, width
, height
, depth
);
1987 if (*pixmap
== NO_PIXMAP
)
1989 x_destroy_x_image (*ximg
);
1991 image_error ("Unable to create X pixmap", Qnil
, Qnil
);
1996 #endif /* HAVE_X_WINDOWS */
2000 BITMAPINFOHEADER
*header
;
2002 int scanline_width_bits
;
2004 int palette_colors
= 0;
2009 if (depth
!= 1 && depth
!= 4 && depth
!= 8
2010 && depth
!= 16 && depth
!= 24 && depth
!= 32)
2012 image_error ("Invalid image bit depth specified", Qnil
, Qnil
);
2016 scanline_width_bits
= width
* depth
;
2017 remainder
= scanline_width_bits
% 32;
2020 scanline_width_bits
+= 32 - remainder
;
2022 /* Bitmaps with a depth less than 16 need a palette. */
2023 /* BITMAPINFO structure already contains the first RGBQUAD. */
2025 palette_colors
= 1 << depth
- 1;
2027 *ximg
= xmalloc (sizeof (XImage
) + palette_colors
* sizeof (RGBQUAD
));
2029 header
= &(*ximg
)->info
.bmiHeader
;
2030 memset (&(*ximg
)->info
, 0, sizeof (BITMAPINFO
));
2031 header
->biSize
= sizeof (*header
);
2032 header
->biWidth
= width
;
2033 header
->biHeight
= -height
; /* negative indicates a top-down bitmap. */
2034 header
->biPlanes
= 1;
2035 header
->biBitCount
= depth
;
2036 header
->biCompression
= BI_RGB
;
2037 header
->biClrUsed
= palette_colors
;
2039 /* TODO: fill in palette. */
2042 (*ximg
)->info
.bmiColors
[0].rgbBlue
= 0;
2043 (*ximg
)->info
.bmiColors
[0].rgbGreen
= 0;
2044 (*ximg
)->info
.bmiColors
[0].rgbRed
= 0;
2045 (*ximg
)->info
.bmiColors
[0].rgbReserved
= 0;
2046 (*ximg
)->info
.bmiColors
[1].rgbBlue
= 255;
2047 (*ximg
)->info
.bmiColors
[1].rgbGreen
= 255;
2048 (*ximg
)->info
.bmiColors
[1].rgbRed
= 255;
2049 (*ximg
)->info
.bmiColors
[1].rgbReserved
= 0;
2052 hdc
= get_frame_dc (f
);
2054 /* Create a DIBSection and raster array for the bitmap,
2055 and store its handle in *pixmap. */
2056 *pixmap
= CreateDIBSection (hdc
, &((*ximg
)->info
),
2057 (depth
< 16) ? DIB_PAL_COLORS
: DIB_RGB_COLORS
,
2058 /* casting avoids a GCC warning */
2059 (void **)&((*ximg
)->data
), NULL
, 0);
2061 /* Realize display palette and garbage all frames. */
2062 release_frame_dc (f
, hdc
);
2064 if (*pixmap
== NULL
)
2066 DWORD err
= GetLastError ();
2067 Lisp_Object errcode
;
2068 /* All system errors are < 10000, so the following is safe. */
2069 XSETINT (errcode
, (int) err
);
2070 image_error ("Unable to create bitmap, error code %d", errcode
, Qnil
);
2071 x_destroy_x_image (*ximg
);
2077 #endif /* HAVE_NTGUI */
2080 *pixmap
= ns_image_for_XPM (width
, height
, depth
);
2084 image_error ("Unable to allocate NSImage for XPM pixmap", Qnil
, Qnil
);
2093 /* Destroy XImage XIMG. Free XIMG->data. */
2096 x_destroy_x_image (XImagePtr ximg
)
2098 xassert (interrupt_input_blocked
);
2101 #ifdef HAVE_X_WINDOWS
2104 XDestroyImage (ximg
);
2105 #endif /* HAVE_X_WINDOWS */
2107 /* Data will be freed by DestroyObject. */
2110 #endif /* HAVE_NTGUI */
2112 ns_release_object (ximg
);
2113 #endif /* HAVE_NS */
2118 /* Put XImage XIMG into pixmap PIXMAP on frame F. WIDTH and HEIGHT
2119 are width and height of both the image and pixmap. */
2122 x_put_x_image (struct frame
*f
, XImagePtr ximg
, Pixmap pixmap
, int width
, int height
)
2124 #ifdef HAVE_X_WINDOWS
2127 xassert (interrupt_input_blocked
);
2128 gc
= XCreateGC (FRAME_X_DISPLAY (f
), pixmap
, 0, NULL
);
2129 XPutImage (FRAME_X_DISPLAY (f
), pixmap
, gc
, ximg
, 0, 0, 0, 0, width
, height
);
2130 XFreeGC (FRAME_X_DISPLAY (f
), gc
);
2131 #endif /* HAVE_X_WINDOWS */
2134 #if 0 /* I don't think this is necessary looking at where it is used. */
2135 HDC hdc
= get_frame_dc (f
);
2136 SetDIBits (hdc
, pixmap
, 0, height
, ximg
->data
, &(ximg
->info
), DIB_RGB_COLORS
);
2137 release_frame_dc (f
, hdc
);
2139 #endif /* HAVE_NTGUI */
2142 xassert (ximg
== pixmap
);
2143 ns_retain_object (ximg
);
2148 /***********************************************************************
2150 ***********************************************************************/
2152 /* Find image file FILE. Look in data-directory/images, then
2153 x-bitmap-file-path. Value is the encoded full name of the file
2154 found, or nil if not found. */
2157 x_find_image_file (Lisp_Object file
)
2159 Lisp_Object file_found
, search_path
;
2162 /* TODO I think this should use something like image-load-path
2163 instead. Unfortunately, that can contain non-string elements. */
2164 search_path
= Fcons (Fexpand_file_name (build_string ("images"),
2166 Vx_bitmap_file_path
);
2168 /* Try to find FILE in data-directory/images, then x-bitmap-file-path. */
2169 fd
= openp (search_path
, file
, Qnil
, &file_found
, Qnil
);
2175 file_found
= ENCODE_FILE (file_found
);
2183 /* Read FILE into memory. Value is a pointer to a buffer allocated
2184 with xmalloc holding FILE's contents. Value is null if an error
2185 occurred. *SIZE is set to the size of the file. */
2187 static unsigned char *
2188 slurp_file (char *file
, ptrdiff_t *size
)
2191 unsigned char *buf
= NULL
;
2194 if (stat (file
, &st
) == 0
2195 && (fp
= fopen (file
, "rb")) != NULL
2196 && 0 <= st
.st_size
&& st
.st_size
<= min (PTRDIFF_MAX
, SIZE_MAX
)
2197 && (buf
= (unsigned char *) xmalloc (st
.st_size
),
2198 fread (buf
, 1, st
.st_size
, fp
) == st
.st_size
))
2219 /***********************************************************************
2221 ***********************************************************************/
2223 static int xbm_scan (unsigned char **, unsigned char *, char *, int *);
2224 static int xbm_load (struct frame
*f
, struct image
*img
);
2225 static int xbm_load_image (struct frame
*f
, struct image
*img
,
2226 unsigned char *, unsigned char *);
2227 static int xbm_image_p (Lisp_Object object
);
2228 static int xbm_read_bitmap_data (struct frame
*f
,
2229 unsigned char *, unsigned char *,
2230 int *, int *, char **, int);
2231 static int xbm_file_p (Lisp_Object
);
2234 /* Indices of image specification fields in xbm_format, below. */
2236 enum xbm_keyword_index
2254 /* Vector of image_keyword structures describing the format
2255 of valid XBM image specifications. */
2257 static const struct image_keyword xbm_format
[XBM_LAST
] =
2259 {":type", IMAGE_SYMBOL_VALUE
, 1},
2260 {":file", IMAGE_STRING_VALUE
, 0},
2261 {":width", IMAGE_POSITIVE_INTEGER_VALUE
, 0},
2262 {":height", IMAGE_POSITIVE_INTEGER_VALUE
, 0},
2263 {":data", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
2264 {":foreground", IMAGE_STRING_OR_NIL_VALUE
, 0},
2265 {":background", IMAGE_STRING_OR_NIL_VALUE
, 0},
2266 {":ascent", IMAGE_ASCENT_VALUE
, 0},
2267 {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR
, 0},
2268 {":relief", IMAGE_INTEGER_VALUE
, 0},
2269 {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
2270 {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
2271 {":mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0}
2274 /* Structure describing the image type XBM. */
2276 static struct image_type xbm_type
=
2285 /* Tokens returned from xbm_scan. */
2294 /* Return non-zero if OBJECT is a valid XBM-type image specification.
2295 A valid specification is a list starting with the symbol `image'
2296 The rest of the list is a property list which must contain an
2299 If the specification specifies a file to load, it must contain
2300 an entry `:file FILENAME' where FILENAME is a string.
2302 If the specification is for a bitmap loaded from memory it must
2303 contain `:width WIDTH', `:height HEIGHT', and `:data DATA', where
2304 WIDTH and HEIGHT are integers > 0. DATA may be:
2306 1. a string large enough to hold the bitmap data, i.e. it must
2307 have a size >= (WIDTH + 7) / 8 * HEIGHT
2309 2. a bool-vector of size >= WIDTH * HEIGHT
2311 3. a vector of strings or bool-vectors, one for each line of the
2314 4. a string containing an in-memory XBM file. WIDTH and HEIGHT
2315 may not be specified in this case because they are defined in the
2318 Both the file and data forms may contain the additional entries
2319 `:background COLOR' and `:foreground COLOR'. If not present,
2320 foreground and background of the frame on which the image is
2321 displayed is used. */
2324 xbm_image_p (Lisp_Object object
)
2326 struct image_keyword kw
[XBM_LAST
];
2328 memcpy (kw
, xbm_format
, sizeof kw
);
2329 if (!parse_image_spec (object
, kw
, XBM_LAST
, Qxbm
))
2332 xassert (EQ (kw
[XBM_TYPE
].value
, Qxbm
));
2334 if (kw
[XBM_FILE
].count
)
2336 if (kw
[XBM_WIDTH
].count
|| kw
[XBM_HEIGHT
].count
|| kw
[XBM_DATA
].count
)
2339 else if (kw
[XBM_DATA
].count
&& xbm_file_p (kw
[XBM_DATA
].value
))
2341 /* In-memory XBM file. */
2342 if (kw
[XBM_WIDTH
].count
|| kw
[XBM_HEIGHT
].count
|| kw
[XBM_FILE
].count
)
2348 EMACS_INT width
, height
;
2350 /* Entries for `:width', `:height' and `:data' must be present. */
2351 if (!kw
[XBM_WIDTH
].count
2352 || !kw
[XBM_HEIGHT
].count
2353 || !kw
[XBM_DATA
].count
)
2356 data
= kw
[XBM_DATA
].value
;
2357 width
= XFASTINT (kw
[XBM_WIDTH
].value
);
2358 height
= XFASTINT (kw
[XBM_HEIGHT
].value
);
2360 /* Check type of data, and width and height against contents of
2366 /* Number of elements of the vector must be >= height. */
2367 if (ASIZE (data
) < height
)
2370 /* Each string or bool-vector in data must be large enough
2371 for one line of the image. */
2372 for (i
= 0; i
< height
; ++i
)
2374 Lisp_Object elt
= XVECTOR (data
)->contents
[i
];
2379 < (width
+ BITS_PER_CHAR
- 1) / BITS_PER_CHAR
)
2382 else if (BOOL_VECTOR_P (elt
))
2384 if (XBOOL_VECTOR (elt
)->size
< width
)
2391 else if (STRINGP (data
))
2394 < (width
+ BITS_PER_CHAR
- 1) / BITS_PER_CHAR
* height
)
2397 else if (BOOL_VECTOR_P (data
))
2399 if (XBOOL_VECTOR (data
)->size
/ height
< width
)
2410 /* Scan a bitmap file. FP is the stream to read from. Value is
2411 either an enumerator from enum xbm_token, or a character for a
2412 single-character token, or 0 at end of file. If scanning an
2413 identifier, store the lexeme of the identifier in SVAL. If
2414 scanning a number, store its value in *IVAL. */
2417 xbm_scan (unsigned char **s
, unsigned char *end
, char *sval
, int *ival
)
2423 /* Skip white space. */
2424 while (*s
< end
&& (c
= *(*s
)++, isspace (c
)))
2429 else if (isdigit (c
))
2431 int value
= 0, digit
;
2433 if (c
== '0' && *s
< end
)
2436 if (c
== 'x' || c
== 'X')
2443 else if (c
>= 'a' && c
<= 'f')
2444 digit
= c
- 'a' + 10;
2445 else if (c
>= 'A' && c
<= 'F')
2446 digit
= c
- 'A' + 10;
2449 value
= 16 * value
+ digit
;
2452 else if (isdigit (c
))
2456 && (c
= *(*s
)++, isdigit (c
)))
2457 value
= 8 * value
+ c
- '0';
2464 && (c
= *(*s
)++, isdigit (c
)))
2465 value
= 10 * value
+ c
- '0';
2473 else if (isalpha (c
) || c
== '_')
2477 && (c
= *(*s
)++, (isalnum (c
) || c
== '_')))
2484 else if (c
== '/' && **s
== '*')
2486 /* C-style comment. */
2488 while (**s
&& (**s
!= '*' || *(*s
+ 1) != '/'))
2502 /* Create a Windows bitmap from X bitmap data. */
2504 w32_create_pixmap_from_bitmap_data (int width
, int height
, char *data
)
2506 static unsigned char swap_nibble
[16]
2507 = { 0x0, 0x8, 0x4, 0xc, /* 0000 1000 0100 1100 */
2508 0x2, 0xa, 0x6, 0xe, /* 0010 1010 0110 1110 */
2509 0x1, 0x9, 0x5, 0xd, /* 0001 1001 0101 1101 */
2510 0x3, 0xb, 0x7, 0xf }; /* 0011 1011 0111 1111 */
2512 unsigned char *bits
, *p
;
2515 w1
= (width
+ 7) / 8; /* nb of 8bits elt in X bitmap */
2516 w2
= ((width
+ 15) / 16) * 2; /* nb of 16bits elt in W32 bitmap */
2517 bits
= (unsigned char *) alloca (height
* w2
);
2518 memset (bits
, 0, height
* w2
);
2519 for (i
= 0; i
< height
; i
++)
2522 for (j
= 0; j
< w1
; j
++)
2524 /* Bitswap XBM bytes to match how Windows does things. */
2525 unsigned char c
= *data
++;
2526 *p
++ = (unsigned char)((swap_nibble
[c
& 0xf] << 4)
2527 | (swap_nibble
[(c
>>4) & 0xf]));
2530 bmp
= CreateBitmap (width
, height
, 1, 1, (char *) bits
);
2536 convert_mono_to_color_image (struct frame
*f
, struct image
*img
,
2537 COLORREF foreground
, COLORREF background
)
2539 HDC hdc
, old_img_dc
, new_img_dc
;
2540 HGDIOBJ old_prev
, new_prev
;
2543 hdc
= get_frame_dc (f
);
2544 old_img_dc
= CreateCompatibleDC (hdc
);
2545 new_img_dc
= CreateCompatibleDC (hdc
);
2546 new_pixmap
= CreateCompatibleBitmap (hdc
, img
->width
, img
->height
);
2547 release_frame_dc (f
, hdc
);
2548 old_prev
= SelectObject (old_img_dc
, img
->pixmap
);
2549 new_prev
= SelectObject (new_img_dc
, new_pixmap
);
2550 /* Windows convention for mono bitmaps is black = background,
2551 white = foreground. */
2552 SetTextColor (new_img_dc
, background
);
2553 SetBkColor (new_img_dc
, foreground
);
2555 BitBlt (new_img_dc
, 0, 0, img
->width
, img
->height
, old_img_dc
,
2558 SelectObject (old_img_dc
, old_prev
);
2559 SelectObject (new_img_dc
, new_prev
);
2560 DeleteDC (old_img_dc
);
2561 DeleteDC (new_img_dc
);
2562 DeleteObject (img
->pixmap
);
2563 if (new_pixmap
== 0)
2564 fprintf (stderr
, "Failed to convert image to color.\n");
2566 img
->pixmap
= new_pixmap
;
2569 #define XBM_BIT_SHUFFLE(b) (~(b))
2573 #define XBM_BIT_SHUFFLE(b) (b)
2575 #endif /* HAVE_NTGUI */
2579 Create_Pixmap_From_Bitmap_Data (struct frame
*f
, struct image
*img
, char *data
,
2580 RGB_PIXEL_COLOR fg
, RGB_PIXEL_COLOR bg
,
2581 int non_default_colors
)
2585 = w32_create_pixmap_from_bitmap_data (img
->width
, img
->height
, data
);
2587 /* If colors were specified, transfer the bitmap to a color one. */
2588 if (non_default_colors
)
2589 convert_mono_to_color_image (f
, img
, fg
, bg
);
2591 #elif defined (HAVE_NS)
2592 img
->pixmap
= ns_image_from_XBM (data
, img
->width
, img
->height
);
2596 (x_check_image_size (0, img
->width
, img
->height
)
2597 ? XCreatePixmapFromBitmapData (FRAME_X_DISPLAY (f
),
2600 img
->width
, img
->height
,
2602 DefaultDepthOfScreen (FRAME_X_SCREEN (f
)))
2604 #endif /* !HAVE_NTGUI && !HAVE_NS */
2609 /* Replacement for XReadBitmapFileData which isn't available under old
2610 X versions. CONTENTS is a pointer to a buffer to parse; END is the
2611 buffer's end. Set *WIDTH and *HEIGHT to the width and height of
2612 the image. Return in *DATA the bitmap data allocated with xmalloc.
2613 Value is non-zero if successful. DATA null means just test if
2614 CONTENTS looks like an in-memory XBM file. If INHIBIT_IMAGE_ERROR
2615 is non-zero, inhibit the call to image_error when the image size is
2616 invalid (the bitmap remains unread). */
2619 xbm_read_bitmap_data (struct frame
*f
, unsigned char *contents
, unsigned char *end
,
2620 int *width
, int *height
, char **data
,
2621 int inhibit_image_error
)
2623 unsigned char *s
= contents
;
2624 char buffer
[BUFSIZ
];
2627 int bytes_per_line
, i
, nbytes
;
2633 LA1 = xbm_scan (&s, end, buffer, &value)
2635 #define expect(TOKEN) \
2636 if (LA1 != (TOKEN)) \
2641 #define expect_ident(IDENT) \
2642 if (LA1 == XBM_TK_IDENT && strcmp (buffer, (IDENT)) == 0) \
2647 *width
= *height
= -1;
2650 LA1
= xbm_scan (&s
, end
, buffer
, &value
);
2652 /* Parse defines for width, height and hot-spots. */
2656 expect_ident ("define");
2657 expect (XBM_TK_IDENT
);
2659 if (LA1
== XBM_TK_NUMBER
)
2661 char *q
= strrchr (buffer
, '_');
2662 q
= q
? q
+ 1 : buffer
;
2663 if (strcmp (q
, "width") == 0)
2665 else if (strcmp (q
, "height") == 0)
2668 expect (XBM_TK_NUMBER
);
2671 if (!check_image_size (f
, *width
, *height
))
2673 if (!inhibit_image_error
)
2674 image_error ("Invalid image size (see `max-image-size')", Qnil
, Qnil
);
2677 else if (data
== NULL
)
2680 /* Parse bits. Must start with `static'. */
2681 expect_ident ("static");
2682 if (LA1
== XBM_TK_IDENT
)
2684 if (strcmp (buffer
, "unsigned") == 0)
2687 expect_ident ("char");
2689 else if (strcmp (buffer
, "short") == 0)
2693 if (*width
% 16 && *width
% 16 < 9)
2696 else if (strcmp (buffer
, "char") == 0)
2704 expect (XBM_TK_IDENT
);
2710 if (! x_check_image_size (0, *width
, *height
))
2712 if (!inhibit_image_error
)
2713 image_error ("Image too large (%dx%d)",
2714 make_number (*width
), make_number (*height
));
2717 bytes_per_line
= (*width
+ 7) / 8 + padding_p
;
2718 nbytes
= bytes_per_line
* *height
;
2719 p
= *data
= (char *) xmalloc (nbytes
);
2723 for (i
= 0; i
< nbytes
; i
+= 2)
2726 expect (XBM_TK_NUMBER
);
2728 *p
++ = XBM_BIT_SHUFFLE (val
);
2729 if (!padding_p
|| ((i
+ 2) % bytes_per_line
))
2730 *p
++ = XBM_BIT_SHUFFLE (value
>> 8);
2732 if (LA1
== ',' || LA1
== '}')
2740 for (i
= 0; i
< nbytes
; ++i
)
2743 expect (XBM_TK_NUMBER
);
2745 *p
++ = XBM_BIT_SHUFFLE (val
);
2747 if (LA1
== ',' || LA1
== '}')
2772 /* Load XBM image IMG which will be displayed on frame F from buffer
2773 CONTENTS. END is the end of the buffer. Value is non-zero if
2777 xbm_load_image (struct frame
*f
, struct image
*img
, unsigned char *contents
,
2784 rc
= xbm_read_bitmap_data (f
, contents
, end
, &img
->width
, &img
->height
,
2788 unsigned long foreground
= FRAME_FOREGROUND_PIXEL (f
);
2789 unsigned long background
= FRAME_BACKGROUND_PIXEL (f
);
2790 int non_default_colors
= 0;
2793 xassert (img
->width
> 0 && img
->height
> 0);
2795 /* Get foreground and background colors, maybe allocate colors. */
2796 value
= image_spec_value (img
->spec
, QCforeground
, NULL
);
2799 foreground
= x_alloc_image_color (f
, img
, value
, foreground
);
2800 non_default_colors
= 1;
2802 value
= image_spec_value (img
->spec
, QCbackground
, NULL
);
2805 background
= x_alloc_image_color (f
, img
, value
, background
);
2806 img
->background
= background
;
2807 img
->background_valid
= 1;
2808 non_default_colors
= 1;
2811 Create_Pixmap_From_Bitmap_Data (f
, img
, data
,
2812 foreground
, background
,
2813 non_default_colors
);
2816 if (img
->pixmap
== NO_PIXMAP
)
2818 x_clear_image (f
, img
);
2819 image_error ("Unable to create X pixmap for `%s'", img
->spec
, Qnil
);
2825 image_error ("Error loading XBM image `%s'", img
->spec
, Qnil
);
2831 /* Value is non-zero if DATA looks like an in-memory XBM file. */
2834 xbm_file_p (Lisp_Object data
)
2837 return (STRINGP (data
)
2838 && xbm_read_bitmap_data (NULL
, SDATA (data
),
2839 (SDATA (data
) + SBYTES (data
)),
2844 /* Fill image IMG which is used on frame F with pixmap data. Value is
2845 non-zero if successful. */
2848 xbm_load (struct frame
*f
, struct image
*img
)
2851 Lisp_Object file_name
;
2853 xassert (xbm_image_p (img
->spec
));
2855 /* If IMG->spec specifies a file name, create a non-file spec from it. */
2856 file_name
= image_spec_value (img
->spec
, QCfile
, NULL
);
2857 if (STRINGP (file_name
))
2860 unsigned char *contents
;
2863 file
= x_find_image_file (file_name
);
2864 if (!STRINGP (file
))
2866 image_error ("Cannot find image file `%s'", file_name
, Qnil
);
2870 contents
= slurp_file (SSDATA (file
), &size
);
2871 if (contents
== NULL
)
2873 image_error ("Error loading XBM image `%s'", img
->spec
, Qnil
);
2877 success_p
= xbm_load_image (f
, img
, contents
, contents
+ size
);
2882 struct image_keyword fmt
[XBM_LAST
];
2884 unsigned long foreground
= FRAME_FOREGROUND_PIXEL (f
);
2885 unsigned long background
= FRAME_BACKGROUND_PIXEL (f
);
2886 int non_default_colors
= 0;
2889 int in_memory_file_p
= 0;
2891 /* See if data looks like an in-memory XBM file. */
2892 data
= image_spec_value (img
->spec
, QCdata
, NULL
);
2893 in_memory_file_p
= xbm_file_p (data
);
2895 /* Parse the image specification. */
2896 memcpy (fmt
, xbm_format
, sizeof fmt
);
2897 parsed_p
= parse_image_spec (img
->spec
, fmt
, XBM_LAST
, Qxbm
);
2901 /* Get specified width, and height. */
2902 if (!in_memory_file_p
)
2904 img
->width
= XFASTINT (fmt
[XBM_WIDTH
].value
);
2905 img
->height
= XFASTINT (fmt
[XBM_HEIGHT
].value
);
2906 xassert (img
->width
> 0 && img
->height
> 0);
2907 if (!check_image_size (f
, img
->width
, img
->height
))
2909 image_error ("Invalid image size (see `max-image-size')",
2915 /* Get foreground and background colors, maybe allocate colors. */
2916 if (fmt
[XBM_FOREGROUND
].count
2917 && STRINGP (fmt
[XBM_FOREGROUND
].value
))
2919 foreground
= x_alloc_image_color (f
, img
, fmt
[XBM_FOREGROUND
].value
,
2921 non_default_colors
= 1;
2924 if (fmt
[XBM_BACKGROUND
].count
2925 && STRINGP (fmt
[XBM_BACKGROUND
].value
))
2927 background
= x_alloc_image_color (f
, img
, fmt
[XBM_BACKGROUND
].value
,
2929 non_default_colors
= 1;
2932 if (in_memory_file_p
)
2933 success_p
= xbm_load_image (f
, img
, SDATA (data
),
2942 int nbytes
= (img
->width
+ BITS_PER_CHAR
- 1) / BITS_PER_CHAR
;
2944 p
= bits
= (char *) alloca (nbytes
* img
->height
);
2945 for (i
= 0; i
< img
->height
; ++i
, p
+= nbytes
)
2947 Lisp_Object line
= XVECTOR (data
)->contents
[i
];
2949 memcpy (p
, SDATA (line
), nbytes
);
2951 memcpy (p
, XBOOL_VECTOR (line
)->data
, nbytes
);
2954 else if (STRINGP (data
))
2955 bits
= SSDATA (data
);
2957 bits
= (char *) XBOOL_VECTOR (data
)->data
;
2963 /* Windows mono bitmaps are reversed compared with X. */
2964 invertedBits
= bits
;
2965 nbytes
= (img
->width
+ BITS_PER_CHAR
- 1) / BITS_PER_CHAR
2967 bits
= (char *) alloca (nbytes
);
2968 for (i
= 0; i
< nbytes
; i
++)
2969 bits
[i
] = XBM_BIT_SHUFFLE (invertedBits
[i
]);
2972 /* Create the pixmap. */
2974 if (x_check_image_size (0, img
->width
, img
->height
))
2975 Create_Pixmap_From_Bitmap_Data (f
, img
, bits
,
2976 foreground
, background
,
2977 non_default_colors
);
2979 img
->pixmap
= NO_PIXMAP
;
2985 image_error ("Unable to create pixmap for XBM image `%s'",
2987 x_clear_image (f
, img
);
2997 /***********************************************************************
2999 ***********************************************************************/
3001 #if defined (HAVE_XPM) || defined (HAVE_NS)
3003 static int xpm_image_p (Lisp_Object object
);
3004 static int xpm_load (struct frame
*f
, struct image
*img
);
3005 static int xpm_valid_color_symbols_p (Lisp_Object
);
3007 #endif /* HAVE_XPM || HAVE_NS */
3011 /* Indicate to xpm.h that we don't have Xlib. */
3013 /* simx.h in xpm defines XColor and XImage differently than Emacs. */
3014 /* It also defines Display the same way as Emacs, but gcc 3.3 still barfs. */
3015 #define XColor xpm_XColor
3016 #define XImage xpm_XImage
3017 #define Display xpm_Display
3018 #define PIXEL_ALREADY_TYPEDEFED
3019 #include "X11/xpm.h"
3024 #undef PIXEL_ALREADY_TYPEDEFED
3026 #include "X11/xpm.h"
3027 #endif /* HAVE_NTGUI */
3028 #endif /* HAVE_XPM */
3030 #if defined (HAVE_XPM) || defined (HAVE_NS)
3031 /* The symbol `xpm' identifying XPM-format images. */
3033 static Lisp_Object Qxpm
;
3035 /* Indices of image specification fields in xpm_format, below. */
3037 enum xpm_keyword_index
3053 /* Vector of image_keyword structures describing the format
3054 of valid XPM image specifications. */
3056 static const struct image_keyword xpm_format
[XPM_LAST
] =
3058 {":type", IMAGE_SYMBOL_VALUE
, 1},
3059 {":file", IMAGE_STRING_VALUE
, 0},
3060 {":data", IMAGE_STRING_VALUE
, 0},
3061 {":ascent", IMAGE_ASCENT_VALUE
, 0},
3062 {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR
, 0},
3063 {":relief", IMAGE_INTEGER_VALUE
, 0},
3064 {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
3065 {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
3066 {":mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
3067 {":color-symbols", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
3068 {":background", IMAGE_STRING_OR_NIL_VALUE
, 0}
3071 /* Structure describing the image type XPM. */
3073 static struct image_type xpm_type
=
3082 #ifdef HAVE_X_WINDOWS
3084 /* Define ALLOC_XPM_COLORS if we can use Emacs' own color allocation
3085 functions for allocating image colors. Our own functions handle
3086 color allocation failures more gracefully than the ones on the XPM
3089 #if defined XpmAllocColor && defined XpmFreeColors && defined XpmColorClosure
3090 #define ALLOC_XPM_COLORS
3092 #endif /* HAVE_X_WINDOWS */
3094 #ifdef ALLOC_XPM_COLORS
3096 static void xpm_init_color_cache (struct frame
*, XpmAttributes
*);
3097 static void xpm_free_color_cache (void);
3098 static int xpm_lookup_color (struct frame
*, char *, XColor
*);
3099 static int xpm_color_bucket (char *);
3100 static struct xpm_cached_color
*xpm_cache_color (struct frame
*, char *,
3103 /* An entry in a hash table used to cache color definitions of named
3104 colors. This cache is necessary to speed up XPM image loading in
3105 case we do color allocations ourselves. Without it, we would need
3106 a call to XParseColor per pixel in the image. */
3108 struct xpm_cached_color
3110 /* Next in collision chain. */
3111 struct xpm_cached_color
*next
;
3113 /* Color definition (RGB and pixel color). */
3120 /* The hash table used for the color cache, and its bucket vector
3123 #define XPM_COLOR_CACHE_BUCKETS 1001
3124 static struct xpm_cached_color
**xpm_color_cache
;
3126 /* Initialize the color cache. */
3129 xpm_init_color_cache (struct frame
*f
, XpmAttributes
*attrs
)
3131 size_t nbytes
= XPM_COLOR_CACHE_BUCKETS
* sizeof *xpm_color_cache
;
3132 xpm_color_cache
= (struct xpm_cached_color
**) xmalloc (nbytes
);
3133 memset (xpm_color_cache
, 0, nbytes
);
3134 init_color_table ();
3136 if (attrs
->valuemask
& XpmColorSymbols
)
3141 for (i
= 0; i
< attrs
->numsymbols
; ++i
)
3142 if (XParseColor (FRAME_X_DISPLAY (f
), FRAME_X_COLORMAP (f
),
3143 attrs
->colorsymbols
[i
].value
, &color
))
3145 color
.pixel
= lookup_rgb_color (f
, color
.red
, color
.green
,
3147 xpm_cache_color (f
, attrs
->colorsymbols
[i
].name
, &color
, -1);
3152 /* Free the color cache. */
3155 xpm_free_color_cache (void)
3157 struct xpm_cached_color
*p
, *next
;
3160 for (i
= 0; i
< XPM_COLOR_CACHE_BUCKETS
; ++i
)
3161 for (p
= xpm_color_cache
[i
]; p
; p
= next
)
3167 xfree (xpm_color_cache
);
3168 xpm_color_cache
= NULL
;
3169 free_color_table ();
3172 /* Return the bucket index for color named COLOR_NAME in the color
3176 xpm_color_bucket (char *color_name
)
3178 EMACS_UINT hash
= hash_string (color_name
, strlen (color_name
));
3179 return hash
% XPM_COLOR_CACHE_BUCKETS
;
3183 /* On frame F, cache values COLOR for color with name COLOR_NAME.
3184 BUCKET, if >= 0, is a precomputed bucket index. Value is the cache
3187 static struct xpm_cached_color
*
3188 xpm_cache_color (struct frame
*f
, char *color_name
, XColor
*color
, int bucket
)
3191 struct xpm_cached_color
*p
;
3194 bucket
= xpm_color_bucket (color_name
);
3196 nbytes
= offsetof (struct xpm_cached_color
, name
) + strlen (color_name
) + 1;
3197 p
= (struct xpm_cached_color
*) xmalloc (nbytes
);
3198 strcpy (p
->name
, color_name
);
3200 p
->next
= xpm_color_cache
[bucket
];
3201 xpm_color_cache
[bucket
] = p
;
3205 /* Look up color COLOR_NAME for frame F in the color cache. If found,
3206 return the cached definition in *COLOR. Otherwise, make a new
3207 entry in the cache and allocate the color. Value is zero if color
3208 allocation failed. */
3211 xpm_lookup_color (struct frame
*f
, char *color_name
, XColor
*color
)
3213 struct xpm_cached_color
*p
;
3214 int h
= xpm_color_bucket (color_name
);
3216 for (p
= xpm_color_cache
[h
]; p
; p
= p
->next
)
3217 if (strcmp (p
->name
, color_name
) == 0)
3222 else if (XParseColor (FRAME_X_DISPLAY (f
), FRAME_X_COLORMAP (f
),
3225 color
->pixel
= lookup_rgb_color (f
, color
->red
, color
->green
,
3227 p
= xpm_cache_color (f
, color_name
, color
, h
);
3229 /* You get `opaque' at least from ImageMagick converting pbm to xpm
3230 with transparency, and it's useful. */
3231 else if (strcmp ("opaque", color_name
) == 0)
3233 memset (color
, 0, sizeof (XColor
)); /* Is this necessary/correct? */
3234 color
->pixel
= FRAME_FOREGROUND_PIXEL (f
);
3235 p
= xpm_cache_color (f
, color_name
, color
, h
);
3242 /* Callback for allocating color COLOR_NAME. Called from the XPM lib.
3243 CLOSURE is a pointer to the frame on which we allocate the
3244 color. Return in *COLOR the allocated color. Value is non-zero
3248 xpm_alloc_color (Display
*dpy
, Colormap cmap
, char *color_name
, XColor
*color
,
3251 return xpm_lookup_color ((struct frame
*) closure
, color_name
, color
);
3255 /* Callback for freeing NPIXELS colors contained in PIXELS. CLOSURE
3256 is a pointer to the frame on which we allocate the color. Value is
3257 non-zero if successful. */
3260 xpm_free_colors (Display
*dpy
, Colormap cmap
, Pixel
*pixels
, int npixels
, void *closure
)
3265 #endif /* ALLOC_XPM_COLORS */
3270 /* XPM library details. */
3272 DEF_IMGLIB_FN (void, XpmFreeAttributes
, (XpmAttributes
*));
3273 DEF_IMGLIB_FN (int, XpmCreateImageFromBuffer
, (Display
*, char *, xpm_XImage
**,
3274 xpm_XImage
**, XpmAttributes
*));
3275 DEF_IMGLIB_FN (int, XpmReadFileToImage
, (Display
*, char *, xpm_XImage
**,
3276 xpm_XImage
**, XpmAttributes
*));
3277 DEF_IMGLIB_FN (void, XImageFree
, (xpm_XImage
*));
3280 init_xpm_functions (Lisp_Object libraries
)
3284 if (!(library
= w32_delayed_load (libraries
, Qxpm
)))
3287 LOAD_IMGLIB_FN (library
, XpmFreeAttributes
);
3288 LOAD_IMGLIB_FN (library
, XpmCreateImageFromBuffer
);
3289 LOAD_IMGLIB_FN (library
, XpmReadFileToImage
);
3290 LOAD_IMGLIB_FN (library
, XImageFree
);
3294 #endif /* HAVE_NTGUI */
3297 /* Value is non-zero if COLOR_SYMBOLS is a valid color symbols list
3298 for XPM images. Such a list must consist of conses whose car and
3302 xpm_valid_color_symbols_p (Lisp_Object color_symbols
)
3304 while (CONSP (color_symbols
))
3306 Lisp_Object sym
= XCAR (color_symbols
);
3308 || !STRINGP (XCAR (sym
))
3309 || !STRINGP (XCDR (sym
)))
3311 color_symbols
= XCDR (color_symbols
);
3314 return NILP (color_symbols
);
3318 /* Value is non-zero if OBJECT is a valid XPM image specification. */
3321 xpm_image_p (Lisp_Object object
)
3323 struct image_keyword fmt
[XPM_LAST
];
3324 memcpy (fmt
, xpm_format
, sizeof fmt
);
3325 return (parse_image_spec (object
, fmt
, XPM_LAST
, Qxpm
)
3326 /* Either `:file' or `:data' must be present. */
3327 && fmt
[XPM_FILE
].count
+ fmt
[XPM_DATA
].count
== 1
3328 /* Either no `:color-symbols' or it's a list of conses
3329 whose car and cdr are strings. */
3330 && (fmt
[XPM_COLOR_SYMBOLS
].count
== 0
3331 || xpm_valid_color_symbols_p (fmt
[XPM_COLOR_SYMBOLS
].value
)));
3334 #endif /* HAVE_XPM || HAVE_NS */
3336 #if defined HAVE_XPM && defined HAVE_X_WINDOWS && !defined USE_GTK
3338 x_create_bitmap_from_xpm_data (struct frame
*f
, const char **bits
)
3340 Display_Info
*dpyinfo
= FRAME_X_DISPLAY_INFO (f
);
3343 XpmAttributes attrs
;
3344 Pixmap bitmap
, mask
;
3346 memset (&attrs
, 0, sizeof attrs
);
3348 attrs
.visual
= FRAME_X_VISUAL (f
);
3349 attrs
.colormap
= FRAME_X_COLORMAP (f
);
3350 attrs
.valuemask
|= XpmVisual
;
3351 attrs
.valuemask
|= XpmColormap
;
3353 rc
= XpmCreatePixmapFromData (FRAME_X_DISPLAY (f
), FRAME_X_WINDOW (f
),
3354 (char **) bits
, &bitmap
, &mask
, &attrs
);
3355 if (rc
!= XpmSuccess
)
3357 XpmFreeAttributes (&attrs
);
3361 id
= x_allocate_bitmap_record (f
);
3362 dpyinfo
->bitmaps
[id
- 1].pixmap
= bitmap
;
3363 dpyinfo
->bitmaps
[id
- 1].have_mask
= 1;
3364 dpyinfo
->bitmaps
[id
- 1].mask
= mask
;
3365 dpyinfo
->bitmaps
[id
- 1].file
= NULL
;
3366 dpyinfo
->bitmaps
[id
- 1].height
= attrs
.height
;
3367 dpyinfo
->bitmaps
[id
- 1].width
= attrs
.width
;
3368 dpyinfo
->bitmaps
[id
- 1].depth
= attrs
.depth
;
3369 dpyinfo
->bitmaps
[id
- 1].refcount
= 1;
3371 XpmFreeAttributes (&attrs
);
3374 #endif /* defined (HAVE_XPM) && defined (HAVE_X_WINDOWS) */
3376 /* Load image IMG which will be displayed on frame F. Value is
3377 non-zero if successful. */
3382 xpm_load (struct frame
*f
, struct image
*img
)
3385 XpmAttributes attrs
;
3386 Lisp_Object specified_file
, color_symbols
;
3389 xpm_XImage
* xpm_image
= NULL
, * xpm_mask
= NULL
;
3390 #endif /* HAVE_NTGUI */
3392 /* Configure the XPM lib. Use the visual of frame F. Allocate
3393 close colors. Return colors allocated. */
3394 memset (&attrs
, 0, sizeof attrs
);
3397 attrs
.visual
= FRAME_X_VISUAL (f
);
3398 attrs
.colormap
= FRAME_X_COLORMAP (f
);
3399 attrs
.valuemask
|= XpmVisual
;
3400 attrs
.valuemask
|= XpmColormap
;
3401 #endif /* HAVE_NTGUI */
3403 #ifdef ALLOC_XPM_COLORS
3404 /* Allocate colors with our own functions which handle
3405 failing color allocation more gracefully. */
3406 attrs
.color_closure
= f
;
3407 attrs
.alloc_color
= xpm_alloc_color
;
3408 attrs
.free_colors
= xpm_free_colors
;
3409 attrs
.valuemask
|= XpmAllocColor
| XpmFreeColors
| XpmColorClosure
;
3410 #else /* not ALLOC_XPM_COLORS */
3411 /* Let the XPM lib allocate colors. */
3412 attrs
.valuemask
|= XpmReturnAllocPixels
;
3413 #ifdef XpmAllocCloseColors
3414 attrs
.alloc_close_colors
= 1;
3415 attrs
.valuemask
|= XpmAllocCloseColors
;
3416 #else /* not XpmAllocCloseColors */
3417 attrs
.closeness
= 600;
3418 attrs
.valuemask
|= XpmCloseness
;
3419 #endif /* not XpmAllocCloseColors */
3420 #endif /* ALLOC_XPM_COLORS */
3422 /* If image specification contains symbolic color definitions, add
3423 these to `attrs'. */
3424 color_symbols
= image_spec_value (img
->spec
, QCcolor_symbols
, NULL
);
3425 if (CONSP (color_symbols
))
3428 XpmColorSymbol
*xpm_syms
;
3431 attrs
.valuemask
|= XpmColorSymbols
;
3433 /* Count number of symbols. */
3434 attrs
.numsymbols
= 0;
3435 for (tail
= color_symbols
; CONSP (tail
); tail
= XCDR (tail
))
3438 /* Allocate an XpmColorSymbol array. */
3439 size
= attrs
.numsymbols
* sizeof *xpm_syms
;
3440 xpm_syms
= (XpmColorSymbol
*) alloca (size
);
3441 memset (xpm_syms
, 0, size
);
3442 attrs
.colorsymbols
= xpm_syms
;
3444 /* Fill the color symbol array. */
3445 for (tail
= color_symbols
, i
= 0;
3447 ++i
, tail
= XCDR (tail
))
3451 char *empty_string
= (char *) "";
3453 if (!CONSP (XCAR (tail
)))
3455 xpm_syms
[i
].name
= empty_string
;
3456 xpm_syms
[i
].value
= empty_string
;
3459 name
= XCAR (XCAR (tail
));
3460 color
= XCDR (XCAR (tail
));
3463 xpm_syms
[i
].name
= (char *) alloca (SCHARS (name
) + 1);
3464 strcpy (xpm_syms
[i
].name
, SSDATA (name
));
3467 xpm_syms
[i
].name
= empty_string
;
3468 if (STRINGP (color
))
3470 xpm_syms
[i
].value
= (char *) alloca (SCHARS (color
) + 1);
3471 strcpy (xpm_syms
[i
].value
, SSDATA (color
));
3474 xpm_syms
[i
].value
= empty_string
;
3478 /* Create a pixmap for the image, either from a file, or from a
3479 string buffer containing data in the same format as an XPM file. */
3480 #ifdef ALLOC_XPM_COLORS
3481 xpm_init_color_cache (f
, &attrs
);
3484 specified_file
= image_spec_value (img
->spec
, QCfile
, NULL
);
3488 HDC frame_dc
= get_frame_dc (f
);
3489 hdc
= CreateCompatibleDC (frame_dc
);
3490 release_frame_dc (f
, frame_dc
);
3492 #endif /* HAVE_NTGUI */
3494 if (STRINGP (specified_file
))
3496 Lisp_Object file
= x_find_image_file (specified_file
);
3497 if (!STRINGP (file
))
3499 image_error ("Cannot find image file `%s'", specified_file
, Qnil
);
3500 #ifdef ALLOC_XPM_COLORS
3501 xpm_free_color_cache ();
3507 /* XpmReadFileToPixmap is not available in the Windows port of
3508 libxpm. But XpmReadFileToImage almost does what we want. */
3509 rc
= fn_XpmReadFileToImage (&hdc
, SDATA (file
),
3510 &xpm_image
, &xpm_mask
,
3513 rc
= XpmReadFileToPixmap (FRAME_X_DISPLAY (f
), FRAME_X_WINDOW (f
),
3514 SSDATA (file
), &img
->pixmap
, &img
->mask
,
3516 #endif /* HAVE_NTGUI */
3520 Lisp_Object buffer
= image_spec_value (img
->spec
, QCdata
, NULL
);
3521 if (!STRINGP (buffer
))
3523 image_error ("Invalid image data `%s'", buffer
, Qnil
);
3524 #ifdef ALLOC_XPM_COLORS
3525 xpm_free_color_cache ();
3530 /* XpmCreatePixmapFromBuffer is not available in the Windows port
3531 of libxpm. But XpmCreateImageFromBuffer almost does what we want. */
3532 rc
= fn_XpmCreateImageFromBuffer (&hdc
, SDATA (buffer
),
3533 &xpm_image
, &xpm_mask
,
3536 rc
= XpmCreatePixmapFromBuffer (FRAME_X_DISPLAY (f
), FRAME_X_WINDOW (f
),
3538 &img
->pixmap
, &img
->mask
,
3540 #endif /* HAVE_NTGUI */
3543 if (rc
== XpmSuccess
)
3545 #if defined (COLOR_TABLE_SUPPORT) && defined (ALLOC_XPM_COLORS)
3546 img
->colors
= colors_in_color_table (&img
->ncolors
);
3547 #else /* not ALLOC_XPM_COLORS */
3551 /* W32 XPM uses XImage to wrap what W32 Emacs calls a Pixmap,
3552 plus some duplicate attributes. */
3553 if (xpm_image
&& xpm_image
->bitmap
)
3555 img
->pixmap
= xpm_image
->bitmap
;
3556 /* XImageFree in libXpm frees XImage struct without destroying
3557 the bitmap, which is what we want. */
3558 fn_XImageFree (xpm_image
);
3560 if (xpm_mask
&& xpm_mask
->bitmap
)
3562 /* The mask appears to be inverted compared with what we expect.
3563 TODO: invert our expectations. See other places where we
3564 have to invert bits because our idea of masks is backwards. */
3566 old_obj
= SelectObject (hdc
, xpm_mask
->bitmap
);
3568 PatBlt (hdc
, 0, 0, xpm_mask
->width
, xpm_mask
->height
, DSTINVERT
);
3569 SelectObject (hdc
, old_obj
);
3571 img
->mask
= xpm_mask
->bitmap
;
3572 fn_XImageFree (xpm_mask
);
3577 #endif /* HAVE_NTGUI */
3579 /* Remember allocated colors. */
3580 img
->ncolors
= attrs
.nalloc_pixels
;
3581 img
->colors
= (unsigned long *) xmalloc (img
->ncolors
3582 * sizeof *img
->colors
);
3583 for (i
= 0; i
< attrs
.nalloc_pixels
; ++i
)
3585 img
->colors
[i
] = attrs
.alloc_pixels
[i
];
3586 #ifdef DEBUG_X_COLORS
3587 register_color (img
->colors
[i
]);
3590 #endif /* not ALLOC_XPM_COLORS */
3592 img
->width
= attrs
.width
;
3593 img
->height
= attrs
.height
;
3594 xassert (img
->width
> 0 && img
->height
> 0);
3596 /* The call to XpmFreeAttributes below frees attrs.alloc_pixels. */
3598 fn_XpmFreeAttributes (&attrs
);
3600 XpmFreeAttributes (&attrs
);
3601 #endif /* HAVE_NTGUI */
3607 #endif /* HAVE_NTGUI */
3612 image_error ("Error opening XPM file (%s)", img
->spec
, Qnil
);
3615 case XpmFileInvalid
:
3616 image_error ("Invalid XPM file (%s)", img
->spec
, Qnil
);
3620 image_error ("Out of memory (%s)", img
->spec
, Qnil
);
3623 case XpmColorFailed
:
3624 image_error ("Color allocation error (%s)", img
->spec
, Qnil
);
3628 image_error ("Unknown error (%s)", img
->spec
, Qnil
);
3633 #ifdef ALLOC_XPM_COLORS
3634 xpm_free_color_cache ();
3636 return rc
== XpmSuccess
;
3639 #endif /* HAVE_XPM */
3641 #if defined (HAVE_NS) && !defined (HAVE_XPM)
3643 /* XPM support functions for NS where libxpm is not available.
3644 Only XPM version 3 (without any extensions) is supported. */
3646 static void xpm_put_color_table_v (Lisp_Object
, const unsigned char *,
3648 static Lisp_Object
xpm_get_color_table_v (Lisp_Object
,
3649 const unsigned char *, int);
3650 static void xpm_put_color_table_h (Lisp_Object
, const unsigned char *,
3652 static Lisp_Object
xpm_get_color_table_h (Lisp_Object
,
3653 const unsigned char *, int);
3655 /* Tokens returned from xpm_scan. */
3664 /* Scan an XPM data and return a character (< 256) or a token defined
3665 by enum xpm_token above. *S and END are the start (inclusive) and
3666 the end (exclusive) addresses of the data, respectively. Advance
3667 *S while scanning. If token is either XPM_TK_IDENT or
3668 XPM_TK_STRING, *BEG and *LEN are set to the start address and the
3669 length of the corresponding token, respectively. */
3672 xpm_scan (const unsigned char **s
,
3673 const unsigned char *end
,
3674 const unsigned char **beg
,
3681 /* Skip white-space. */
3682 while (*s
< end
&& (c
= *(*s
)++, isspace (c
)))
3685 /* gnus-pointer.xpm uses '-' in its identifier.
3686 sb-dir-plus.xpm uses '+' in its identifier. */
3687 if (isalpha (c
) || c
== '_' || c
== '-' || c
== '+')
3691 && (c
= **s
, isalnum (c
) || c
== '_' || c
== '-' || c
== '+'))
3694 return XPM_TK_IDENT
;
3699 while (*s
< end
&& **s
!= '"')
3704 return XPM_TK_STRING
;
3708 if (*s
< end
&& **s
== '*')
3710 /* C-style comment. */
3714 while (*s
< end
&& *(*s
)++ != '*')
3717 while (*s
< end
&& **s
!= '/');
3731 /* Functions for color table lookup in XPM data. A key is a string
3732 specifying the color of each pixel in XPM data. A value is either
3733 an integer that specifies a pixel color, Qt that specifies
3734 transparency, or Qnil for the unspecified color. If the length of
3735 the key string is one, a vector is used as a table. Otherwise, a
3736 hash table is used. */
3739 xpm_make_color_table_v (void (**put_func
) (Lisp_Object
,
3740 const unsigned char *,
3743 Lisp_Object (**get_func
) (Lisp_Object
,
3744 const unsigned char *,
3747 *put_func
= xpm_put_color_table_v
;
3748 *get_func
= xpm_get_color_table_v
;
3749 return Fmake_vector (make_number (256), Qnil
);
3753 xpm_put_color_table_v (Lisp_Object color_table
,
3754 const unsigned char *chars_start
,
3758 XVECTOR (color_table
)->contents
[*chars_start
] = color
;
3762 xpm_get_color_table_v (Lisp_Object color_table
,
3763 const unsigned char *chars_start
,
3766 return XVECTOR (color_table
)->contents
[*chars_start
];
3770 xpm_make_color_table_h (void (**put_func
) (Lisp_Object
,
3771 const unsigned char *,
3774 Lisp_Object (**get_func
) (Lisp_Object
,
3775 const unsigned char *,
3778 *put_func
= xpm_put_color_table_h
;
3779 *get_func
= xpm_get_color_table_h
;
3780 return make_hash_table (Qequal
, make_number (DEFAULT_HASH_SIZE
),
3781 make_float (DEFAULT_REHASH_SIZE
),
3782 make_float (DEFAULT_REHASH_THRESHOLD
),
3787 xpm_put_color_table_h (Lisp_Object color_table
,
3788 const unsigned char *chars_start
,
3792 struct Lisp_Hash_Table
*table
= XHASH_TABLE (color_table
);
3793 EMACS_UINT hash_code
;
3794 Lisp_Object chars
= make_unibyte_string (chars_start
, chars_len
);
3796 hash_lookup (table
, chars
, &hash_code
);
3797 hash_put (table
, chars
, color
, hash_code
);
3801 xpm_get_color_table_h (Lisp_Object color_table
,
3802 const unsigned char *chars_start
,
3805 struct Lisp_Hash_Table
*table
= XHASH_TABLE (color_table
);
3806 int i
= hash_lookup (table
, make_unibyte_string (chars_start
, chars_len
),
3809 return i
>= 0 ? HASH_VALUE (table
, i
) : Qnil
;
3812 enum xpm_color_key
{
3820 static const char xpm_color_key_strings
[][4] = {"s", "m", "g4", "g", "c"};
3823 xpm_str_to_color_key (const char *s
)
3828 i
< sizeof xpm_color_key_strings
/ sizeof xpm_color_key_strings
[0];
3830 if (strcmp (xpm_color_key_strings
[i
], s
) == 0)
3836 xpm_load_image (struct frame
*f
,
3838 const unsigned char *contents
,
3839 const unsigned char *end
)
3841 const unsigned char *s
= contents
, *beg
, *str
;
3842 unsigned char buffer
[BUFSIZ
];
3843 int width
, height
, x
, y
;
3844 int num_colors
, chars_per_pixel
;
3847 void (*put_color_table
) (Lisp_Object
, const unsigned char *, int, Lisp_Object
);
3848 Lisp_Object (*get_color_table
) (Lisp_Object
, const unsigned char *, int);
3849 Lisp_Object frame
, color_symbols
, color_table
;
3850 int best_key
, have_mask
= 0;
3851 XImagePtr ximg
= NULL
, mask_img
= NULL
;
3854 LA1 = xpm_scan (&s, end, &beg, &len)
3856 #define expect(TOKEN) \
3857 if (LA1 != (TOKEN)) \
3862 #define expect_ident(IDENT) \
3863 if (LA1 == XPM_TK_IDENT \
3864 && strlen ((IDENT)) == len && memcmp ((IDENT), beg, len) == 0) \
3869 if (!(end
- s
>= 9 && memcmp (s
, "/* XPM */", 9) == 0))
3873 expect_ident ("static");
3874 expect_ident ("char");
3876 expect (XPM_TK_IDENT
);
3881 expect (XPM_TK_STRING
);
3884 memcpy (buffer
, beg
, len
);
3886 if (sscanf (buffer
, "%d %d %d %d", &width
, &height
,
3887 &num_colors
, &chars_per_pixel
) != 4
3888 || width
<= 0 || height
<= 0
3889 || num_colors
<= 0 || chars_per_pixel
<= 0)
3892 if (!check_image_size (f
, width
, height
))
3894 image_error ("Invalid image size (see `max-image-size')", Qnil
, Qnil
);
3898 if (!x_create_x_image_and_pixmap (f
, width
, height
, 0,
3899 &ximg
, &img
->pixmap
)
3901 || !x_create_x_image_and_pixmap (f
, width
, height
, 1,
3902 &mask_img
, &img
->mask
)
3906 image_error ("Image too large", Qnil
, Qnil
);
3912 XSETFRAME (frame
, f
);
3913 if (!NILP (Fxw_display_color_p (frame
)))
3914 best_key
= XPM_COLOR_KEY_C
;
3915 else if (!NILP (Fx_display_grayscale_p (frame
)))
3916 best_key
= (XFASTINT (Fx_display_planes (frame
)) > 2
3917 ? XPM_COLOR_KEY_G
: XPM_COLOR_KEY_G4
);
3919 best_key
= XPM_COLOR_KEY_M
;
3921 color_symbols
= image_spec_value (img
->spec
, QCcolor_symbols
, NULL
);
3922 if (chars_per_pixel
== 1)
3923 color_table
= xpm_make_color_table_v (&put_color_table
,
3926 color_table
= xpm_make_color_table_h (&put_color_table
,
3929 while (num_colors
-- > 0)
3931 char *color
, *max_color
;
3932 int key
, next_key
, max_key
= 0;
3933 Lisp_Object symbol_color
= Qnil
, color_val
;
3936 expect (XPM_TK_STRING
);
3937 if (len
<= chars_per_pixel
|| len
>= BUFSIZ
+ chars_per_pixel
)
3939 memcpy (buffer
, beg
+ chars_per_pixel
, len
- chars_per_pixel
);
3940 buffer
[len
- chars_per_pixel
] = '\0';
3942 str
= strtok (buffer
, " \t");
3945 key
= xpm_str_to_color_key (str
);
3950 color
= strtok (NULL
, " \t");
3954 while ((str
= strtok (NULL
, " \t")) != NULL
)
3956 next_key
= xpm_str_to_color_key (str
);
3959 color
[strlen (color
)] = ' ';
3962 if (key
== XPM_COLOR_KEY_S
)
3964 if (NILP (symbol_color
))
3965 symbol_color
= build_string (color
);
3967 else if (max_key
< key
&& key
<= best_key
)
3977 if (!NILP (color_symbols
) && !NILP (symbol_color
))
3979 Lisp_Object specified_color
= Fassoc (symbol_color
, color_symbols
);
3981 if (CONSP (specified_color
) && STRINGP (XCDR (specified_color
)))
3983 if (xstrcasecmp (SSDATA (XCDR (specified_color
)), "None") == 0)
3985 else if (x_defined_color (f
, SDATA (XCDR (specified_color
)),
3987 color_val
= make_number (cdef
.pixel
);
3990 if (NILP (color_val
) && max_key
> 0)
3992 if (xstrcasecmp (max_color
, "None") == 0)
3994 else if (x_defined_color (f
, max_color
, &cdef
, 0))
3995 color_val
= make_number (cdef
.pixel
);
3997 if (!NILP (color_val
))
3998 (*put_color_table
) (color_table
, beg
, chars_per_pixel
, color_val
);
4003 for (y
= 0; y
< height
; y
++)
4005 expect (XPM_TK_STRING
);
4007 if (len
< width
* chars_per_pixel
)
4009 for (x
= 0; x
< width
; x
++, str
+= chars_per_pixel
)
4011 Lisp_Object color_val
=
4012 (*get_color_table
) (color_table
, str
, chars_per_pixel
);
4014 XPutPixel (ximg
, x
, y
,
4015 (INTEGERP (color_val
) ? XINT (color_val
)
4016 : FRAME_FOREGROUND_PIXEL (f
)));
4018 XPutPixel (mask_img
, x
, y
,
4019 (!EQ (color_val
, Qt
) ? PIX_MASK_DRAW
4020 : (have_mask
= 1, PIX_MASK_RETAIN
)));
4022 if (EQ (color_val
, Qt
))
4023 ns_set_alpha (ximg
, x
, y
, 0);
4031 img
->height
= height
;
4033 /* Maybe fill in the background field while we have ximg handy. */
4034 if (NILP (image_spec_value (img
->spec
, QCbackground
, NULL
)))
4035 IMAGE_BACKGROUND (img
, f
, ximg
);
4037 x_put_x_image (f
, ximg
, img
->pixmap
, width
, height
);
4038 x_destroy_x_image (ximg
);
4042 /* Fill in the background_transparent field while we have the
4044 image_background_transparent (img
, f
, mask_img
);
4046 x_put_x_image (f
, mask_img
, img
->mask
, width
, height
);
4047 x_destroy_x_image (mask_img
);
4051 x_destroy_x_image (mask_img
);
4052 Free_Pixmap (FRAME_X_DISPLAY (f
), img
->mask
);
4053 img
->mask
= NO_PIXMAP
;
4059 image_error ("Invalid XPM file (%s)", img
->spec
, Qnil
);
4061 x_destroy_x_image (ximg
);
4062 x_destroy_x_image (mask_img
);
4063 x_clear_image (f
, img
);
4072 xpm_load (struct frame
*f
,
4076 Lisp_Object file_name
;
4078 /* If IMG->spec specifies a file name, create a non-file spec from it. */
4079 file_name
= image_spec_value (img
->spec
, QCfile
, NULL
);
4080 if (STRINGP (file_name
))
4083 unsigned char *contents
;
4086 file
= x_find_image_file (file_name
);
4087 if (!STRINGP (file
))
4089 image_error ("Cannot find image file `%s'", file_name
, Qnil
);
4093 contents
= slurp_file (SDATA (file
), &size
);
4094 if (contents
== NULL
)
4096 image_error ("Error loading XPM image `%s'", img
->spec
, Qnil
);
4100 success_p
= xpm_load_image (f
, img
, contents
, contents
+ size
);
4107 data
= image_spec_value (img
->spec
, QCdata
, NULL
);
4108 if (!STRINGP (data
))
4110 image_error ("Invalid image data `%s'", data
, Qnil
);
4113 success_p
= xpm_load_image (f
, img
, SDATA (data
),
4114 SDATA (data
) + SBYTES (data
));
4120 #endif /* HAVE_NS && !HAVE_XPM */
4124 /***********************************************************************
4126 ***********************************************************************/
4128 #ifdef COLOR_TABLE_SUPPORT
4130 /* An entry in the color table mapping an RGB color to a pixel color. */
4135 unsigned long pixel
;
4137 /* Next in color table collision list. */
4138 struct ct_color
*next
;
4141 /* The bucket vector size to use. Must be prime. */
4145 /* Value is a hash of the RGB color given by R, G, and B. */
4147 #define CT_HASH_RGB(R, G, B) (((R) << 16) ^ ((G) << 8) ^ (B))
4149 /* The color hash table. */
4151 static struct ct_color
**ct_table
;
4153 /* Number of entries in the color table. */
4155 static int ct_colors_allocated
;
4157 /* Initialize the color table. */
4160 init_color_table (void)
4162 int size
= CT_SIZE
* sizeof (*ct_table
);
4163 ct_table
= (struct ct_color
**) xmalloc (size
);
4164 memset (ct_table
, 0, size
);
4165 ct_colors_allocated
= 0;
4169 /* Free memory associated with the color table. */
4172 free_color_table (void)
4175 struct ct_color
*p
, *next
;
4177 for (i
= 0; i
< CT_SIZE
; ++i
)
4178 for (p
= ct_table
[i
]; p
; p
= next
)
4189 /* Value is a pixel color for RGB color R, G, B on frame F. If an
4190 entry for that color already is in the color table, return the
4191 pixel color of that entry. Otherwise, allocate a new color for R,
4192 G, B, and make an entry in the color table. */
4194 static unsigned long
4195 lookup_rgb_color (struct frame
*f
, int r
, int g
, int b
)
4197 unsigned hash
= CT_HASH_RGB (r
, g
, b
);
4198 int i
= hash
% CT_SIZE
;
4200 Display_Info
*dpyinfo
;
4202 /* Handle TrueColor visuals specially, which improves performance by
4203 two orders of magnitude. Freeing colors on TrueColor visuals is
4204 a nop, and pixel colors specify RGB values directly. See also
4205 the Xlib spec, chapter 3.1. */
4206 dpyinfo
= FRAME_X_DISPLAY_INFO (f
);
4207 if (dpyinfo
->red_bits
> 0)
4209 unsigned long pr
, pg
, pb
;
4211 /* Apply gamma-correction like normal color allocation does. */
4215 color
.red
= r
, color
.green
= g
, color
.blue
= b
;
4216 gamma_correct (f
, &color
);
4217 r
= color
.red
, g
= color
.green
, b
= color
.blue
;
4220 /* Scale down RGB values to the visual's bits per RGB, and shift
4221 them to the right position in the pixel color. Note that the
4222 original RGB values are 16-bit values, as usual in X. */
4223 pr
= (r
>> (16 - dpyinfo
->red_bits
)) << dpyinfo
->red_offset
;
4224 pg
= (g
>> (16 - dpyinfo
->green_bits
)) << dpyinfo
->green_offset
;
4225 pb
= (b
>> (16 - dpyinfo
->blue_bits
)) << dpyinfo
->blue_offset
;
4227 /* Assemble the pixel color. */
4228 return pr
| pg
| pb
;
4231 for (p
= ct_table
[i
]; p
; p
= p
->next
)
4232 if (p
->r
== r
&& p
->g
== g
&& p
->b
== b
)
4238 #ifdef HAVE_X_WINDOWS
4247 cmap
= FRAME_X_COLORMAP (f
);
4248 rc
= x_alloc_nearest_color (f
, cmap
, &color
);
4251 ++ct_colors_allocated
;
4252 p
= (struct ct_color
*) xmalloc (sizeof *p
);
4256 p
->pixel
= color
.pixel
;
4257 p
->next
= ct_table
[i
];
4261 return FRAME_FOREGROUND_PIXEL (f
);
4266 color
= PALETTERGB (r
, g
, b
);
4268 color
= RGB_TO_ULONG (r
, g
, b
);
4269 #endif /* HAVE_NTGUI */
4270 ++ct_colors_allocated
;
4271 p
= (struct ct_color
*) xmalloc (sizeof *p
);
4276 p
->next
= ct_table
[i
];
4278 #endif /* HAVE_X_WINDOWS */
4286 /* Look up pixel color PIXEL which is used on frame F in the color
4287 table. If not already present, allocate it. Value is PIXEL. */
4289 static unsigned long
4290 lookup_pixel_color (struct frame
*f
, unsigned long pixel
)
4292 int i
= pixel
% CT_SIZE
;
4295 for (p
= ct_table
[i
]; p
; p
= p
->next
)
4296 if (p
->pixel
== pixel
)
4305 #ifdef HAVE_X_WINDOWS
4306 cmap
= FRAME_X_COLORMAP (f
);
4307 color
.pixel
= pixel
;
4308 x_query_color (f
, &color
);
4309 rc
= x_alloc_nearest_color (f
, cmap
, &color
);
4312 cmap
= DefaultColormapOfScreen (FRAME_X_SCREEN (f
));
4313 color
.pixel
= pixel
;
4314 XQueryColor (NULL
, cmap
, &color
);
4315 rc
= x_alloc_nearest_color (f
, cmap
, &color
);
4317 #endif /* HAVE_X_WINDOWS */
4321 ++ct_colors_allocated
;
4323 p
= (struct ct_color
*) xmalloc (sizeof *p
);
4328 p
->next
= ct_table
[i
];
4332 return FRAME_FOREGROUND_PIXEL (f
);
4338 /* Value is a vector of all pixel colors contained in the color table,
4339 allocated via xmalloc. Set *N to the number of colors. */
4341 static unsigned long *
4342 colors_in_color_table (int *n
)
4346 unsigned long *colors
;
4348 if (ct_colors_allocated
== 0)
4355 colors
= (unsigned long *) xmalloc (ct_colors_allocated
4357 *n
= ct_colors_allocated
;
4359 for (i
= j
= 0; i
< CT_SIZE
; ++i
)
4360 for (p
= ct_table
[i
]; p
; p
= p
->next
)
4361 colors
[j
++] = p
->pixel
;
4367 #else /* COLOR_TABLE_SUPPORT */
4369 static unsigned long
4370 lookup_rgb_color (struct frame
*f
, int r
, int g
, int b
)
4372 unsigned long pixel
;
4375 pixel
= PALETTERGB (r
>> 8, g
>> 8, b
>> 8);
4376 #endif /* HAVE_NTGUI */
4379 pixel
= RGB_TO_ULONG (r
>> 8, g
>> 8, b
>> 8);
4380 #endif /* HAVE_NS */
4385 init_color_table (void)
4388 #endif /* COLOR_TABLE_SUPPORT */
4391 /***********************************************************************
4393 ***********************************************************************/
4395 static XColor
*x_to_xcolors (struct frame
*, struct image
*, int);
4396 static void x_from_xcolors (struct frame
*, struct image
*, XColor
*);
4397 static void x_detect_edges (struct frame
*, struct image
*, int[9], int);
4400 static void XPutPixel (XImagePtr
, int, int, COLORREF
);
4401 #endif /* HAVE_NTGUI */
4403 /* Edge detection matrices for different edge-detection
4406 static int emboss_matrix
[9] = {
4408 2, -1, 0, /* y - 1 */
4410 0, 1, -2 /* y + 1 */
4413 static int laplace_matrix
[9] = {
4415 1, 0, 0, /* y - 1 */
4417 0, 0, -1 /* y + 1 */
4420 /* Value is the intensity of the color whose red/green/blue values
4423 #define COLOR_INTENSITY(R, G, B) ((2 * (R) + 3 * (G) + (B)) / 6)
4426 /* On frame F, return an array of XColor structures describing image
4427 IMG->pixmap. Each XColor structure has its pixel color set. RGB_P
4428 non-zero means also fill the red/green/blue members of the XColor
4429 structures. Value is a pointer to the array of XColors structures,
4430 allocated with xmalloc; it must be freed by the caller. */
4433 x_to_xcolors (struct frame
*f
, struct image
*img
, int rgb_p
)
4437 XImagePtr_or_DC ximg
;
4441 #endif /* HAVE_NTGUI */
4443 colors
= (XColor
*) xmalloc (img
->width
* img
->height
* sizeof *colors
);
4446 /* Get the X image IMG->pixmap. */
4447 ximg
= XGetImage (FRAME_X_DISPLAY (f
), img
->pixmap
,
4448 0, 0, img
->width
, img
->height
, ~0, ZPixmap
);
4450 /* Load the image into a memory device context. */
4451 hdc
= get_frame_dc (f
);
4452 ximg
= CreateCompatibleDC (hdc
);
4453 release_frame_dc (f
, hdc
);
4454 prev
= SelectObject (ximg
, img
->pixmap
);
4455 #endif /* HAVE_NTGUI */
4457 /* Fill the `pixel' members of the XColor array. I wished there
4458 were an easy and portable way to circumvent XGetPixel. */
4460 for (y
= 0; y
< img
->height
; ++y
)
4464 #if defined (HAVE_X_WINDOWS) || defined (HAVE_NTGUI)
4465 for (x
= 0; x
< img
->width
; ++x
, ++p
)
4466 p
->pixel
= GET_PIXEL (ximg
, x
, y
);
4468 x_query_colors (f
, row
, img
->width
);
4472 for (x
= 0; x
< img
->width
; ++x
, ++p
)
4474 /* W32_TODO: palette support needed here? */
4475 p
->pixel
= GET_PIXEL (ximg
, x
, y
);
4478 p
->red
= RED16_FROM_ULONG (p
->pixel
);
4479 p
->green
= GREEN16_FROM_ULONG (p
->pixel
);
4480 p
->blue
= BLUE16_FROM_ULONG (p
->pixel
);
4483 #endif /* HAVE_X_WINDOWS */
4486 Destroy_Image (ximg
, prev
);
4493 /* Put a pixel of COLOR at position X, Y in XIMG. XIMG must have been
4494 created with CreateDIBSection, with the pointer to the bit values
4495 stored in ximg->data. */
4498 XPutPixel (XImagePtr ximg
, int x
, int y
, COLORREF color
)
4500 int width
= ximg
->info
.bmiHeader
.biWidth
;
4501 unsigned char * pixel
;
4503 /* True color images. */
4504 if (ximg
->info
.bmiHeader
.biBitCount
== 24)
4506 int rowbytes
= width
* 3;
4507 /* Ensure scanlines are aligned on 4 byte boundaries. */
4509 rowbytes
+= 4 - (rowbytes
% 4);
4511 pixel
= ximg
->data
+ y
* rowbytes
+ x
* 3;
4512 /* Windows bitmaps are in BGR order. */
4513 *pixel
= GetBValue (color
);
4514 *(pixel
+ 1) = GetGValue (color
);
4515 *(pixel
+ 2) = GetRValue (color
);
4517 /* Monochrome images. */
4518 else if (ximg
->info
.bmiHeader
.biBitCount
== 1)
4520 int rowbytes
= width
/ 8;
4521 /* Ensure scanlines are aligned on 4 byte boundaries. */
4523 rowbytes
+= 4 - (rowbytes
% 4);
4524 pixel
= ximg
->data
+ y
* rowbytes
+ x
/ 8;
4525 /* Filter out palette info. */
4526 if (color
& 0x00ffffff)
4527 *pixel
= *pixel
| (1 << x
% 8);
4529 *pixel
= *pixel
& ~(1 << x
% 8);
4532 image_error ("XPutPixel: palette image not supported", Qnil
, Qnil
);
4535 #endif /* HAVE_NTGUI */
4537 /* Create IMG->pixmap from an array COLORS of XColor structures, whose
4538 RGB members are set. F is the frame on which this all happens.
4539 COLORS will be freed; an existing IMG->pixmap will be freed, too. */
4542 x_from_xcolors (struct frame
*f
, struct image
*img
, XColor
*colors
)
4545 XImagePtr oimg
= NULL
;
4549 init_color_table ();
4551 x_create_x_image_and_pixmap (f
, img
->width
, img
->height
, 0,
4554 for (y
= 0; y
< img
->height
; ++y
)
4555 for (x
= 0; x
< img
->width
; ++x
, ++p
)
4557 unsigned long pixel
;
4558 pixel
= lookup_rgb_color (f
, p
->red
, p
->green
, p
->blue
);
4559 XPutPixel (oimg
, x
, y
, pixel
);
4563 x_clear_image_1 (f
, img
, 1, 0, 1);
4565 x_put_x_image (f
, oimg
, pixmap
, img
->width
, img
->height
);
4566 x_destroy_x_image (oimg
);
4567 img
->pixmap
= pixmap
;
4568 #ifdef COLOR_TABLE_SUPPORT
4569 img
->colors
= colors_in_color_table (&img
->ncolors
);
4570 free_color_table ();
4571 #endif /* COLOR_TABLE_SUPPORT */
4575 /* On frame F, perform edge-detection on image IMG.
4577 MATRIX is a nine-element array specifying the transformation
4578 matrix. See emboss_matrix for an example.
4580 COLOR_ADJUST is a color adjustment added to each pixel of the
4584 x_detect_edges (struct frame
*f
, struct image
*img
, int *matrix
, int color_adjust
)
4586 XColor
*colors
= x_to_xcolors (f
, img
, 1);
4590 for (i
= sum
= 0; i
< 9; ++i
)
4591 sum
+= eabs (matrix
[i
]);
4593 #define COLOR(A, X, Y) ((A) + (Y) * img->width + (X))
4595 new = (XColor
*) xmalloc (img
->width
* img
->height
* sizeof *new);
4597 for (y
= 0; y
< img
->height
; ++y
)
4599 p
= COLOR (new, 0, y
);
4600 p
->red
= p
->green
= p
->blue
= 0xffff/2;
4601 p
= COLOR (new, img
->width
- 1, y
);
4602 p
->red
= p
->green
= p
->blue
= 0xffff/2;
4605 for (x
= 1; x
< img
->width
- 1; ++x
)
4607 p
= COLOR (new, x
, 0);
4608 p
->red
= p
->green
= p
->blue
= 0xffff/2;
4609 p
= COLOR (new, x
, img
->height
- 1);
4610 p
->red
= p
->green
= p
->blue
= 0xffff/2;
4613 for (y
= 1; y
< img
->height
- 1; ++y
)
4615 p
= COLOR (new, 1, y
);
4617 for (x
= 1; x
< img
->width
- 1; ++x
, ++p
)
4619 int r
, g
, b
, yy
, xx
;
4622 for (yy
= y
- 1; yy
< y
+ 2; ++yy
)
4623 for (xx
= x
- 1; xx
< x
+ 2; ++xx
, ++i
)
4626 XColor
*t
= COLOR (colors
, xx
, yy
);
4627 r
+= matrix
[i
] * t
->red
;
4628 g
+= matrix
[i
] * t
->green
;
4629 b
+= matrix
[i
] * t
->blue
;
4632 r
= (r
/ sum
+ color_adjust
) & 0xffff;
4633 g
= (g
/ sum
+ color_adjust
) & 0xffff;
4634 b
= (b
/ sum
+ color_adjust
) & 0xffff;
4635 p
->red
= p
->green
= p
->blue
= COLOR_INTENSITY (r
, g
, b
);
4640 x_from_xcolors (f
, img
, new);
4646 /* Perform the pre-defined `emboss' edge-detection on image IMG
4650 x_emboss (struct frame
*f
, struct image
*img
)
4652 x_detect_edges (f
, img
, emboss_matrix
, 0xffff / 2);
4656 /* Transform image IMG which is used on frame F with a Laplace
4657 edge-detection algorithm. The result is an image that can be used
4658 to draw disabled buttons, for example. */
4661 x_laplace (struct frame
*f
, struct image
*img
)
4663 x_detect_edges (f
, img
, laplace_matrix
, 45000);
4667 /* Perform edge-detection on image IMG on frame F, with specified
4668 transformation matrix MATRIX and color-adjustment COLOR_ADJUST.
4670 MATRIX must be either
4672 - a list of at least 9 numbers in row-major form
4673 - a vector of at least 9 numbers
4675 COLOR_ADJUST nil means use a default; otherwise it must be a
4679 x_edge_detection (struct frame
*f
, struct image
*img
, Lisp_Object matrix
,
4680 Lisp_Object color_adjust
)
4688 i
< 9 && CONSP (matrix
) && NUMBERP (XCAR (matrix
));
4689 ++i
, matrix
= XCDR (matrix
))
4690 trans
[i
] = XFLOATINT (XCAR (matrix
));
4692 else if (VECTORP (matrix
) && ASIZE (matrix
) >= 9)
4694 for (i
= 0; i
< 9 && NUMBERP (AREF (matrix
, i
)); ++i
)
4695 trans
[i
] = XFLOATINT (AREF (matrix
, i
));
4698 if (NILP (color_adjust
))
4699 color_adjust
= make_number (0xffff / 2);
4701 if (i
== 9 && NUMBERP (color_adjust
))
4702 x_detect_edges (f
, img
, trans
, XFLOATINT (color_adjust
));
4706 /* Transform image IMG on frame F so that it looks disabled. */
4709 x_disable_image (struct frame
*f
, struct image
*img
)
4711 Display_Info
*dpyinfo
= FRAME_X_DISPLAY_INFO (f
);
4713 int n_planes
= dpyinfo
->n_planes
* dpyinfo
->n_cbits
;
4715 int n_planes
= dpyinfo
->n_planes
;
4716 #endif /* HAVE_NTGUI */
4720 /* Color (or grayscale). Convert to gray, and equalize. Just
4721 drawing such images with a stipple can look very odd, so
4722 we're using this method instead. */
4723 XColor
*colors
= x_to_xcolors (f
, img
, 1);
4725 const int h
= 15000;
4726 const int l
= 30000;
4728 for (p
= colors
, end
= colors
+ img
->width
* img
->height
;
4732 int i
= COLOR_INTENSITY (p
->red
, p
->green
, p
->blue
);
4733 int i2
= (0xffff - h
- l
) * i
/ 0xffff + l
;
4734 p
->red
= p
->green
= p
->blue
= i2
;
4737 x_from_xcolors (f
, img
, colors
);
4740 /* Draw a cross over the disabled image, if we must or if we
4742 if (n_planes
< 2 || cross_disabled_images
)
4745 Display
*dpy
= FRAME_X_DISPLAY (f
);
4748 #ifndef HAVE_NS /* TODO: NS support, however this not needed for toolbars */
4750 #define MaskForeground(f) WHITE_PIX_DEFAULT (f)
4752 gc
= XCreateGC (dpy
, img
->pixmap
, 0, NULL
);
4753 XSetForeground (dpy
, gc
, BLACK_PIX_DEFAULT (f
));
4754 XDrawLine (dpy
, img
->pixmap
, gc
, 0, 0,
4755 img
->width
- 1, img
->height
- 1);
4756 XDrawLine (dpy
, img
->pixmap
, gc
, 0, img
->height
- 1,
4762 gc
= XCreateGC (dpy
, img
->mask
, 0, NULL
);
4763 XSetForeground (dpy
, gc
, MaskForeground (f
));
4764 XDrawLine (dpy
, img
->mask
, gc
, 0, 0,
4765 img
->width
- 1, img
->height
- 1);
4766 XDrawLine (dpy
, img
->mask
, gc
, 0, img
->height
- 1,
4770 #endif /* !HAVE_NS */
4775 hdc
= get_frame_dc (f
);
4776 bmpdc
= CreateCompatibleDC (hdc
);
4777 release_frame_dc (f
, hdc
);
4779 prev
= SelectObject (bmpdc
, img
->pixmap
);
4781 SetTextColor (bmpdc
, BLACK_PIX_DEFAULT (f
));
4782 MoveToEx (bmpdc
, 0, 0, NULL
);
4783 LineTo (bmpdc
, img
->width
- 1, img
->height
- 1);
4784 MoveToEx (bmpdc
, 0, img
->height
- 1, NULL
);
4785 LineTo (bmpdc
, img
->width
- 1, 0);
4789 SelectObject (bmpdc
, img
->mask
);
4790 SetTextColor (bmpdc
, WHITE_PIX_DEFAULT (f
));
4791 MoveToEx (bmpdc
, 0, 0, NULL
);
4792 LineTo (bmpdc
, img
->width
- 1, img
->height
- 1);
4793 MoveToEx (bmpdc
, 0, img
->height
- 1, NULL
);
4794 LineTo (bmpdc
, img
->width
- 1, 0);
4796 SelectObject (bmpdc
, prev
);
4798 #endif /* HAVE_NTGUI */
4803 /* Build a mask for image IMG which is used on frame F. FILE is the
4804 name of an image file, for error messages. HOW determines how to
4805 determine the background color of IMG. If it is a list '(R G B)',
4806 with R, G, and B being integers >= 0, take that as the color of the
4807 background. Otherwise, determine the background color of IMG
4808 heuristically. Value is non-zero if successful. */
4811 x_build_heuristic_mask (struct frame
*f
, struct image
*img
, Lisp_Object how
)
4813 XImagePtr_or_DC ximg
;
4821 #endif /* HAVE_NTGUI */
4822 int x
, y
, rc
, use_img_background
;
4823 unsigned long bg
= 0;
4827 Free_Pixmap (FRAME_X_DISPLAY (f
), img
->mask
);
4828 img
->mask
= NO_PIXMAP
;
4829 img
->background_transparent_valid
= 0;
4834 /* Create an image and pixmap serving as mask. */
4835 rc
= x_create_x_image_and_pixmap (f
, img
->width
, img
->height
, 1,
4836 &mask_img
, &img
->mask
);
4839 #endif /* !HAVE_NS */
4841 /* Get the X image of IMG->pixmap. */
4842 ximg
= XGetImage (FRAME_X_DISPLAY (f
), img
->pixmap
, 0, 0,
4843 img
->width
, img
->height
,
4846 /* Create the bit array serving as mask. */
4847 row_width
= (img
->width
+ 7) / 8;
4848 mask_img
= xmalloc (row_width
* img
->height
);
4849 memset (mask_img
, 0, row_width
* img
->height
);
4851 /* Create a memory device context for IMG->pixmap. */
4852 frame_dc
= get_frame_dc (f
);
4853 ximg
= CreateCompatibleDC (frame_dc
);
4854 release_frame_dc (f
, frame_dc
);
4855 prev
= SelectObject (ximg
, img
->pixmap
);
4856 #endif /* HAVE_NTGUI */
4858 /* Determine the background color of ximg. If HOW is `(R G B)'
4859 take that as color. Otherwise, use the image's background color. */
4860 use_img_background
= 1;
4866 for (i
= 0; i
< 3 && CONSP (how
) && NATNUMP (XCAR (how
)); ++i
)
4868 rgb
[i
] = XFASTINT (XCAR (how
)) & 0xffff;
4872 if (i
== 3 && NILP (how
))
4874 char color_name
[30];
4875 sprintf (color_name
, "#%04x%04x%04x", rgb
[0], rgb
[1], rgb
[2]);
4878 0x00ffffff & /* Filter out palette info. */
4879 #endif /* HAVE_NTGUI */
4880 x_alloc_image_color (f
, img
, build_string (color_name
), 0));
4881 use_img_background
= 0;
4885 if (use_img_background
)
4886 bg
= four_corners_best (ximg
, img
->corners
, img
->width
, img
->height
);
4888 /* Set all bits in mask_img to 1 whose color in ximg is different
4889 from the background color bg. */
4891 for (y
= 0; y
< img
->height
; ++y
)
4892 for (x
= 0; x
< img
->width
; ++x
)
4894 XPutPixel (mask_img
, x
, y
, (XGetPixel (ximg
, x
, y
) != bg
4895 ? PIX_MASK_DRAW
: PIX_MASK_RETAIN
));
4897 if (XGetPixel (ximg
, x
, y
) == bg
)
4898 ns_set_alpha (ximg
, x
, y
, 0);
4899 #endif /* HAVE_NS */
4901 /* Fill in the background_transparent field while we have the mask handy. */
4902 image_background_transparent (img
, f
, mask_img
);
4904 /* Put mask_img into img->mask. */
4905 x_put_x_image (f
, mask_img
, img
->mask
, img
->width
, img
->height
);
4906 x_destroy_x_image (mask_img
);
4907 #endif /* !HAVE_NS */
4909 for (y
= 0; y
< img
->height
; ++y
)
4910 for (x
= 0; x
< img
->width
; ++x
)
4912 COLORREF p
= GetPixel (ximg
, x
, y
);
4914 mask_img
[y
* row_width
+ x
/ 8] |= 1 << (x
% 8);
4917 /* Create the mask image. */
4918 img
->mask
= w32_create_pixmap_from_bitmap_data (img
->width
, img
->height
,
4920 /* Fill in the background_transparent field while we have the mask handy. */
4921 SelectObject (ximg
, img
->mask
);
4922 image_background_transparent (img
, f
, ximg
);
4924 /* Was: x_destroy_x_image ((XImagePtr )mask_img); which seems bogus ++kfs */
4926 #endif /* HAVE_NTGUI */
4928 Destroy_Image (ximg
, prev
);
4934 /***********************************************************************
4935 PBM (mono, gray, color)
4936 ***********************************************************************/
4938 static int pbm_image_p (Lisp_Object object
);
4939 static int pbm_load (struct frame
*f
, struct image
*img
);
4940 static int pbm_scan_number (unsigned char **, unsigned char *);
4942 /* The symbol `pbm' identifying images of this type. */
4944 static Lisp_Object Qpbm
;
4946 /* Indices of image specification fields in gs_format, below. */
4948 enum pbm_keyword_index
4964 /* Vector of image_keyword structures describing the format
4965 of valid user-defined image specifications. */
4967 static const struct image_keyword pbm_format
[PBM_LAST
] =
4969 {":type", IMAGE_SYMBOL_VALUE
, 1},
4970 {":file", IMAGE_STRING_VALUE
, 0},
4971 {":data", IMAGE_STRING_VALUE
, 0},
4972 {":ascent", IMAGE_ASCENT_VALUE
, 0},
4973 {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR
, 0},
4974 {":relief", IMAGE_INTEGER_VALUE
, 0},
4975 {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
4976 {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
4977 {":mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
4978 {":foreground", IMAGE_STRING_OR_NIL_VALUE
, 0},
4979 {":background", IMAGE_STRING_OR_NIL_VALUE
, 0}
4982 /* Structure describing the image type `pbm'. */
4984 static struct image_type pbm_type
=
4994 /* Return non-zero if OBJECT is a valid PBM image specification. */
4997 pbm_image_p (Lisp_Object object
)
4999 struct image_keyword fmt
[PBM_LAST
];
5001 memcpy (fmt
, pbm_format
, sizeof fmt
);
5003 if (!parse_image_spec (object
, fmt
, PBM_LAST
, Qpbm
))
5006 /* Must specify either :data or :file. */
5007 return fmt
[PBM_DATA
].count
+ fmt
[PBM_FILE
].count
== 1;
5011 /* Scan a decimal number from *S and return it. Advance *S while
5012 reading the number. END is the end of the string. Value is -1 at
5016 pbm_scan_number (unsigned char **s
, unsigned char *end
)
5018 int c
= 0, val
= -1;
5022 /* Skip white-space. */
5023 while (*s
< end
&& (c
= *(*s
)++, isspace (c
)))
5028 /* Skip comment to end of line. */
5029 while (*s
< end
&& (c
= *(*s
)++, c
!= '\n'))
5032 else if (isdigit (c
))
5034 /* Read decimal number. */
5036 while (*s
< end
&& (c
= *(*s
)++, isdigit (c
)))
5037 val
= 10 * val
+ c
- '0';
5049 #if 0 /* Unused. ++kfs */
5051 /* Read FILE into memory. Value is a pointer to a buffer allocated
5052 with xmalloc holding FILE's contents. Value is null if an error
5053 occurred. *SIZE is set to the size of the file. */
5056 pbm_read_file (Lisp_Object file
, int *size
)
5062 if (stat (SDATA (file
), &st
) == 0
5063 && (fp
= fopen (SDATA (file
), "rb")) != NULL
5064 && 0 <= st
.st_size
&& st
.st_size
<= min (PTRDIFF_MAX
, SIZE_MAX
)
5065 && (buf
= (char *) xmalloc (st
.st_size
),
5066 fread (buf
, 1, st
.st_size
, fp
) == st
.st_size
))
5085 #endif /* HAVE_NTGUI */
5087 /* Load PBM image IMG for use on frame F. */
5090 pbm_load (struct frame
*f
, struct image
*img
)
5093 int width
, height
, max_color_idx
= 0;
5095 Lisp_Object file
, specified_file
;
5096 enum {PBM_MONO
, PBM_GRAY
, PBM_COLOR
} type
;
5097 unsigned char *contents
= NULL
;
5098 unsigned char *end
, *p
;
5101 specified_file
= image_spec_value (img
->spec
, QCfile
, NULL
);
5103 if (STRINGP (specified_file
))
5105 file
= x_find_image_file (specified_file
);
5106 if (!STRINGP (file
))
5108 image_error ("Cannot find image file `%s'", specified_file
, Qnil
);
5112 contents
= slurp_file (SSDATA (file
), &size
);
5113 if (contents
== NULL
)
5115 image_error ("Error reading `%s'", file
, Qnil
);
5120 end
= contents
+ size
;
5125 data
= image_spec_value (img
->spec
, QCdata
, NULL
);
5126 if (!STRINGP (data
))
5128 image_error ("Invalid image data `%s'", data
, Qnil
);
5132 end
= p
+ SBYTES (data
);
5135 /* Check magic number. */
5136 if (end
- p
< 2 || *p
++ != 'P')
5138 image_error ("Not a PBM image: `%s'", img
->spec
, Qnil
);
5147 raw_p
= 0, type
= PBM_MONO
;
5151 raw_p
= 0, type
= PBM_GRAY
;
5155 raw_p
= 0, type
= PBM_COLOR
;
5159 raw_p
= 1, type
= PBM_MONO
;
5163 raw_p
= 1, type
= PBM_GRAY
;
5167 raw_p
= 1, type
= PBM_COLOR
;
5171 image_error ("Not a PBM image: `%s'", img
->spec
, Qnil
);
5175 /* Read width, height, maximum color-component. Characters
5176 starting with `#' up to the end of a line are ignored. */
5177 width
= pbm_scan_number (&p
, end
);
5178 height
= pbm_scan_number (&p
, end
);
5180 if (type
!= PBM_MONO
)
5182 max_color_idx
= pbm_scan_number (&p
, end
);
5183 if (max_color_idx
> 65535 || max_color_idx
< 0)
5185 image_error ("Unsupported maximum PBM color value", Qnil
, Qnil
);
5190 if (!check_image_size (f
, width
, height
))
5192 image_error ("Invalid image size (see `max-image-size')", Qnil
, Qnil
);
5196 if (!x_create_x_image_and_pixmap (f
, width
, height
, 0,
5197 &ximg
, &img
->pixmap
))
5200 /* Initialize the color hash table. */
5201 init_color_table ();
5203 if (type
== PBM_MONO
)
5206 struct image_keyword fmt
[PBM_LAST
];
5207 unsigned long fg
= FRAME_FOREGROUND_PIXEL (f
);
5208 unsigned long bg
= FRAME_BACKGROUND_PIXEL (f
);
5210 /* Parse the image specification. */
5211 memcpy (fmt
, pbm_format
, sizeof fmt
);
5212 parse_image_spec (img
->spec
, fmt
, PBM_LAST
, Qpbm
);
5214 /* Get foreground and background colors, maybe allocate colors. */
5215 if (fmt
[PBM_FOREGROUND
].count
5216 && STRINGP (fmt
[PBM_FOREGROUND
].value
))
5217 fg
= x_alloc_image_color (f
, img
, fmt
[PBM_FOREGROUND
].value
, fg
);
5218 if (fmt
[PBM_BACKGROUND
].count
5219 && STRINGP (fmt
[PBM_BACKGROUND
].value
))
5221 bg
= x_alloc_image_color (f
, img
, fmt
[PBM_BACKGROUND
].value
, bg
);
5222 img
->background
= bg
;
5223 img
->background_valid
= 1;
5226 for (y
= 0; y
< height
; ++y
)
5227 for (x
= 0; x
< width
; ++x
)
5235 x_destroy_x_image (ximg
);
5236 x_clear_image (f
, img
);
5237 image_error ("Invalid image size in image `%s'",
5247 g
= pbm_scan_number (&p
, end
);
5249 XPutPixel (ximg
, x
, y
, g
? fg
: bg
);
5254 int expected_size
= height
* width
;
5255 if (max_color_idx
> 255)
5257 if (type
== PBM_COLOR
)
5260 if (raw_p
&& p
+ expected_size
> end
)
5262 x_destroy_x_image (ximg
);
5263 x_clear_image (f
, img
);
5264 image_error ("Invalid image size in image `%s'",
5269 for (y
= 0; y
< height
; ++y
)
5270 for (x
= 0; x
< width
; ++x
)
5274 if (type
== PBM_GRAY
&& raw_p
)
5277 if (max_color_idx
> 255)
5278 r
= g
= b
= r
* 256 + *p
++;
5280 else if (type
== PBM_GRAY
)
5281 r
= g
= b
= pbm_scan_number (&p
, end
);
5285 if (max_color_idx
> 255)
5288 if (max_color_idx
> 255)
5291 if (max_color_idx
> 255)
5296 r
= pbm_scan_number (&p
, end
);
5297 g
= pbm_scan_number (&p
, end
);
5298 b
= pbm_scan_number (&p
, end
);
5301 if (r
< 0 || g
< 0 || b
< 0)
5303 x_destroy_x_image (ximg
);
5304 image_error ("Invalid pixel value in image `%s'",
5309 /* RGB values are now in the range 0..max_color_idx.
5310 Scale this to the range 0..0xffff supported by X. */
5311 r
= (double) r
* 65535 / max_color_idx
;
5312 g
= (double) g
* 65535 / max_color_idx
;
5313 b
= (double) b
* 65535 / max_color_idx
;
5314 XPutPixel (ximg
, x
, y
, lookup_rgb_color (f
, r
, g
, b
));
5318 #ifdef COLOR_TABLE_SUPPORT
5319 /* Store in IMG->colors the colors allocated for the image, and
5320 free the color table. */
5321 img
->colors
= colors_in_color_table (&img
->ncolors
);
5322 free_color_table ();
5323 #endif /* COLOR_TABLE_SUPPORT */
5326 img
->height
= height
;
5328 /* Maybe fill in the background field while we have ximg handy. */
5330 if (NILP (image_spec_value (img
->spec
, QCbackground
, NULL
)))
5331 /* Casting avoids a GCC warning. */
5332 IMAGE_BACKGROUND (img
, f
, (XImagePtr_or_DC
)ximg
);
5334 /* Put the image into a pixmap. */
5335 x_put_x_image (f
, ximg
, img
->pixmap
, width
, height
);
5336 x_destroy_x_image (ximg
);
5338 /* X and W32 versions did it here, MAC version above. ++kfs
5340 img->height = height; */
5347 /***********************************************************************
5349 ***********************************************************************/
5351 #if defined (HAVE_PNG) || defined (HAVE_NS)
5353 /* Function prototypes. */
5355 static int png_image_p (Lisp_Object object
);
5356 static int png_load (struct frame
*f
, struct image
*img
);
5358 /* The symbol `png' identifying images of this type. */
5360 static Lisp_Object Qpng
;
5362 /* Indices of image specification fields in png_format, below. */
5364 enum png_keyword_index
5379 /* Vector of image_keyword structures describing the format
5380 of valid user-defined image specifications. */
5382 static const struct image_keyword png_format
[PNG_LAST
] =
5384 {":type", IMAGE_SYMBOL_VALUE
, 1},
5385 {":data", IMAGE_STRING_VALUE
, 0},
5386 {":file", IMAGE_STRING_VALUE
, 0},
5387 {":ascent", IMAGE_ASCENT_VALUE
, 0},
5388 {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR
, 0},
5389 {":relief", IMAGE_INTEGER_VALUE
, 0},
5390 {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
5391 {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
5392 {":mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
5393 {":background", IMAGE_STRING_OR_NIL_VALUE
, 0}
5396 /* Structure describing the image type `png'. */
5398 static struct image_type png_type
=
5407 /* Return non-zero if OBJECT is a valid PNG image specification. */
5410 png_image_p (Lisp_Object object
)
5412 struct image_keyword fmt
[PNG_LAST
];
5413 memcpy (fmt
, png_format
, sizeof fmt
);
5415 if (!parse_image_spec (object
, fmt
, PNG_LAST
, Qpng
))
5418 /* Must specify either the :data or :file keyword. */
5419 return fmt
[PNG_FILE
].count
+ fmt
[PNG_DATA
].count
== 1;
5422 #endif /* HAVE_PNG || HAVE_NS */
5428 /* PNG library details. */
5430 DEF_IMGLIB_FN (png_voidp
, png_get_io_ptr
, (png_structp
));
5431 DEF_IMGLIB_FN (int, png_sig_cmp
, (png_bytep
, png_size_t
, png_size_t
));
5432 DEF_IMGLIB_FN (png_structp
, png_create_read_struct
, (png_const_charp
, png_voidp
,
5433 png_error_ptr
, png_error_ptr
));
5434 DEF_IMGLIB_FN (png_infop
, png_create_info_struct
, (png_structp
));
5435 DEF_IMGLIB_FN (void, png_destroy_read_struct
, (png_structpp
, png_infopp
, png_infopp
));
5436 DEF_IMGLIB_FN (void, png_set_read_fn
, (png_structp
, png_voidp
, png_rw_ptr
));
5437 DEF_IMGLIB_FN (void, png_set_sig_bytes
, (png_structp
, int));
5438 DEF_IMGLIB_FN (void, png_read_info
, (png_structp
, png_infop
));
5439 DEF_IMGLIB_FN (png_uint_32
, png_get_IHDR
, (png_structp
, png_infop
,
5440 png_uint_32
*, png_uint_32
*,
5441 int *, int *, int *, int *, int *));
5442 DEF_IMGLIB_FN (png_uint_32
, png_get_valid
, (png_structp
, png_infop
, png_uint_32
));
5443 DEF_IMGLIB_FN (void, png_set_strip_16
, (png_structp
));
5444 DEF_IMGLIB_FN (void, png_set_expand
, (png_structp
));
5445 DEF_IMGLIB_FN (void, png_set_gray_to_rgb
, (png_structp
));
5446 DEF_IMGLIB_FN (void, png_set_background
, (png_structp
, png_color_16p
,
5448 DEF_IMGLIB_FN (png_uint_32
, png_get_bKGD
, (png_structp
, png_infop
, png_color_16p
*));
5449 DEF_IMGLIB_FN (void, png_read_update_info
, (png_structp
, png_infop
));
5450 DEF_IMGLIB_FN (png_byte
, png_get_channels
, (png_structp
, png_infop
));
5451 DEF_IMGLIB_FN (png_size_t
, png_get_rowbytes
, (png_structp
, png_infop
));
5452 DEF_IMGLIB_FN (void, png_read_image
, (png_structp
, png_bytepp
));
5453 DEF_IMGLIB_FN (void, png_read_end
, (png_structp
, png_infop
));
5454 DEF_IMGLIB_FN (void, png_error
, (png_structp
, png_const_charp
));
5456 #if (PNG_LIBPNG_VER >= 10500)
5457 DEF_IMGLIB_FN (void, png_longjmp
, (png_structp
, int));
5458 DEF_IMGLIB_FN (jmp_buf *, png_set_longjmp_fn
, (png_structp
, png_longjmp_ptr
, size_t));
5459 #endif /* libpng version >= 1.5 */
5462 init_png_functions (Lisp_Object libraries
)
5466 if (!(library
= w32_delayed_load (libraries
, Qpng
)))
5469 LOAD_IMGLIB_FN (library
, png_get_io_ptr
);
5470 LOAD_IMGLIB_FN (library
, png_sig_cmp
);
5471 LOAD_IMGLIB_FN (library
, png_create_read_struct
);
5472 LOAD_IMGLIB_FN (library
, png_create_info_struct
);
5473 LOAD_IMGLIB_FN (library
, png_destroy_read_struct
);
5474 LOAD_IMGLIB_FN (library
, png_set_read_fn
);
5475 LOAD_IMGLIB_FN (library
, png_set_sig_bytes
);
5476 LOAD_IMGLIB_FN (library
, png_read_info
);
5477 LOAD_IMGLIB_FN (library
, png_get_IHDR
);
5478 LOAD_IMGLIB_FN (library
, png_get_valid
);
5479 LOAD_IMGLIB_FN (library
, png_set_strip_16
);
5480 LOAD_IMGLIB_FN (library
, png_set_expand
);
5481 LOAD_IMGLIB_FN (library
, png_set_gray_to_rgb
);
5482 LOAD_IMGLIB_FN (library
, png_set_background
);
5483 LOAD_IMGLIB_FN (library
, png_get_bKGD
);
5484 LOAD_IMGLIB_FN (library
, png_read_update_info
);
5485 LOAD_IMGLIB_FN (library
, png_get_channels
);
5486 LOAD_IMGLIB_FN (library
, png_get_rowbytes
);
5487 LOAD_IMGLIB_FN (library
, png_read_image
);
5488 LOAD_IMGLIB_FN (library
, png_read_end
);
5489 LOAD_IMGLIB_FN (library
, png_error
);
5491 #if (PNG_LIBPNG_VER >= 10500)
5492 LOAD_IMGLIB_FN (library
, png_longjmp
);
5493 LOAD_IMGLIB_FN (library
, png_set_longjmp_fn
);
5494 #endif /* libpng version >= 1.5 */
5500 #define fn_png_get_io_ptr png_get_io_ptr
5501 #define fn_png_sig_cmp png_sig_cmp
5502 #define fn_png_create_read_struct png_create_read_struct
5503 #define fn_png_create_info_struct png_create_info_struct
5504 #define fn_png_destroy_read_struct png_destroy_read_struct
5505 #define fn_png_set_read_fn png_set_read_fn
5506 #define fn_png_set_sig_bytes png_set_sig_bytes
5507 #define fn_png_read_info png_read_info
5508 #define fn_png_get_IHDR png_get_IHDR
5509 #define fn_png_get_valid png_get_valid
5510 #define fn_png_set_strip_16 png_set_strip_16
5511 #define fn_png_set_expand png_set_expand
5512 #define fn_png_set_gray_to_rgb png_set_gray_to_rgb
5513 #define fn_png_set_background png_set_background
5514 #define fn_png_get_bKGD png_get_bKGD
5515 #define fn_png_read_update_info png_read_update_info
5516 #define fn_png_get_channels png_get_channels
5517 #define fn_png_get_rowbytes png_get_rowbytes
5518 #define fn_png_read_image png_read_image
5519 #define fn_png_read_end png_read_end
5520 #define fn_png_error png_error
5522 #if (PNG_LIBPNG_VER >= 10500)
5523 #define fn_png_longjmp png_longjmp
5524 #define fn_png_set_longjmp_fn png_set_longjmp_fn
5525 #endif /* libpng version >= 1.5 */
5527 #endif /* HAVE_NTGUI */
5530 #if (PNG_LIBPNG_VER < 10500)
5531 #define PNG_LONGJMP(ptr) (longjmp ((ptr)->jmpbuf, 1))
5532 #define PNG_JMPBUF(ptr) ((ptr)->jmpbuf)
5534 /* In libpng version 1.5, the jmpbuf member is hidden. (Bug#7908) */
5535 #define PNG_LONGJMP(ptr) (fn_png_longjmp ((ptr), 1))
5536 #define PNG_JMPBUF(ptr) \
5537 (*fn_png_set_longjmp_fn((ptr), longjmp, sizeof (jmp_buf)))
5540 /* Error and warning handlers installed when the PNG library
5543 static void my_png_error (png_struct
*, const char *) NO_RETURN
;
5545 my_png_error (png_struct
*png_ptr
, const char *msg
)
5547 xassert (png_ptr
!= NULL
);
5548 /* Avoid compiler warning about deprecated direct access to
5549 png_ptr's fields in libpng versions 1.4.x. */
5550 image_error ("PNG error: %s", build_string (msg
), Qnil
);
5551 PNG_LONGJMP (png_ptr
);
5556 my_png_warning (png_struct
*png_ptr
, const char *msg
)
5558 xassert (png_ptr
!= NULL
);
5559 image_error ("PNG warning: %s", build_string (msg
), Qnil
);
5562 /* Memory source for PNG decoding. */
5564 struct png_memory_storage
5566 unsigned char *bytes
; /* The data */
5567 ptrdiff_t len
; /* How big is it? */
5568 ptrdiff_t index
; /* Where are we? */
5572 /* Function set as reader function when reading PNG image from memory.
5573 PNG_PTR is a pointer to the PNG control structure. Copy LENGTH
5574 bytes from the input to DATA. */
5577 png_read_from_memory (png_structp png_ptr
, png_bytep data
, png_size_t length
)
5579 struct png_memory_storage
*tbr
5580 = (struct png_memory_storage
*) fn_png_get_io_ptr (png_ptr
);
5582 if (length
> tbr
->len
- tbr
->index
)
5583 fn_png_error (png_ptr
, "Read error");
5585 memcpy (data
, tbr
->bytes
+ tbr
->index
, length
);
5586 tbr
->index
= tbr
->index
+ length
;
5590 /* Function set as reader function when reading PNG image from a file.
5591 PNG_PTR is a pointer to the PNG control structure. Copy LENGTH
5592 bytes from the input to DATA. */
5595 png_read_from_file (png_structp png_ptr
, png_bytep data
, png_size_t length
)
5597 FILE *fp
= (FILE *) fn_png_get_io_ptr (png_ptr
);
5599 if (fread (data
, 1, length
, fp
) < length
)
5600 fn_png_error (png_ptr
, "Read error");
5604 /* Load PNG image IMG for use on frame F. Value is non-zero if
5608 png_load (struct frame
*f
, struct image
*img
)
5610 Lisp_Object file
, specified_file
;
5611 Lisp_Object specified_data
;
5614 XImagePtr ximg
, mask_img
= NULL
;
5615 png_struct
*png_ptr
= NULL
;
5616 png_info
*info_ptr
= NULL
, *end_info
= NULL
;
5617 FILE *volatile fp
= NULL
;
5619 png_byte
* volatile pixels
= NULL
;
5620 png_byte
** volatile rows
= NULL
;
5621 png_uint_32 width
, height
;
5622 int bit_depth
, color_type
, interlace_type
;
5624 png_uint_32 row_bytes
;
5626 struct png_memory_storage tbr
; /* Data to be read */
5628 /* Find out what file to load. */
5629 specified_file
= image_spec_value (img
->spec
, QCfile
, NULL
);
5630 specified_data
= image_spec_value (img
->spec
, QCdata
, NULL
);
5632 if (NILP (specified_data
))
5634 file
= x_find_image_file (specified_file
);
5635 if (!STRINGP (file
))
5637 image_error ("Cannot find image file `%s'", specified_file
, Qnil
);
5641 /* Open the image file. */
5642 fp
= fopen (SSDATA (file
), "rb");
5645 image_error ("Cannot open image file `%s'", file
, Qnil
);
5649 /* Check PNG signature. */
5650 if (fread (sig
, 1, sizeof sig
, fp
) != sizeof sig
5651 || fn_png_sig_cmp (sig
, 0, sizeof sig
))
5653 image_error ("Not a PNG file: `%s'", file
, Qnil
);
5660 if (!STRINGP (specified_data
))
5662 image_error ("Invalid image data `%s'", specified_data
, Qnil
);
5666 /* Read from memory. */
5667 tbr
.bytes
= SDATA (specified_data
);
5668 tbr
.len
= SBYTES (specified_data
);
5671 /* Check PNG signature. */
5672 if (tbr
.len
< sizeof sig
5673 || fn_png_sig_cmp (tbr
.bytes
, 0, sizeof sig
))
5675 image_error ("Not a PNG image: `%s'", img
->spec
, Qnil
);
5679 /* Need to skip past the signature. */
5680 tbr
.bytes
+= sizeof (sig
);
5683 /* Initialize read and info structs for PNG lib. */
5684 png_ptr
= fn_png_create_read_struct (PNG_LIBPNG_VER_STRING
,
5689 if (fp
) fclose (fp
);
5693 info_ptr
= fn_png_create_info_struct (png_ptr
);
5696 fn_png_destroy_read_struct (&png_ptr
, NULL
, NULL
);
5697 if (fp
) fclose (fp
);
5701 end_info
= fn_png_create_info_struct (png_ptr
);
5704 fn_png_destroy_read_struct (&png_ptr
, &info_ptr
, NULL
);
5705 if (fp
) fclose (fp
);
5709 /* Set error jump-back. We come back here when the PNG library
5710 detects an error. */
5711 if (setjmp (PNG_JMPBUF (png_ptr
)))
5715 fn_png_destroy_read_struct (&png_ptr
, &info_ptr
, &end_info
);
5718 if (fp
) fclose (fp
);
5722 /* Read image info. */
5723 if (!NILP (specified_data
))
5724 fn_png_set_read_fn (png_ptr
, (void *) &tbr
, png_read_from_memory
);
5726 fn_png_set_read_fn (png_ptr
, (void *) fp
, png_read_from_file
);
5728 fn_png_set_sig_bytes (png_ptr
, sizeof sig
);
5729 fn_png_read_info (png_ptr
, info_ptr
);
5730 fn_png_get_IHDR (png_ptr
, info_ptr
, &width
, &height
, &bit_depth
, &color_type
,
5731 &interlace_type
, NULL
, NULL
);
5733 if (! (width
<= INT_MAX
&& height
<= INT_MAX
5734 && check_image_size (f
, width
, height
)))
5736 image_error ("Invalid image size (see `max-image-size')", Qnil
, Qnil
);
5740 /* Create the X image and pixmap now, so that the work below can be
5741 omitted if the image is too large for X. */
5742 if (!x_create_x_image_and_pixmap (f
, width
, height
, 0, &ximg
,
5746 /* If image contains simply transparency data, we prefer to
5747 construct a clipping mask. */
5748 if (fn_png_get_valid (png_ptr
, info_ptr
, PNG_INFO_tRNS
))
5753 /* This function is easier to write if we only have to handle
5754 one data format: RGB or RGBA with 8 bits per channel. Let's
5755 transform other formats into that format. */
5757 /* Strip more than 8 bits per channel. */
5758 if (bit_depth
== 16)
5759 fn_png_set_strip_16 (png_ptr
);
5761 /* Expand data to 24 bit RGB, or 8 bit grayscale, with alpha channel
5763 fn_png_set_expand (png_ptr
);
5765 /* Convert grayscale images to RGB. */
5766 if (color_type
== PNG_COLOR_TYPE_GRAY
5767 || color_type
== PNG_COLOR_TYPE_GRAY_ALPHA
)
5768 fn_png_set_gray_to_rgb (png_ptr
);
5770 /* Handle alpha channel by combining the image with a background
5771 color. Do this only if a real alpha channel is supplied. For
5772 simple transparency, we prefer a clipping mask. */
5775 /* png_color_16 *image_bg; */
5776 Lisp_Object specified_bg
5777 = image_spec_value (img
->spec
, QCbackground
, NULL
);
5778 int shift
= (bit_depth
== 16) ? 0 : 8;
5780 if (STRINGP (specified_bg
))
5781 /* The user specified `:background', use that. */
5784 if (x_defined_color (f
, SSDATA (specified_bg
), &color
, 0))
5786 png_color_16 user_bg
;
5788 memset (&user_bg
, 0, sizeof user_bg
);
5789 user_bg
.red
= color
.red
>> shift
;
5790 user_bg
.green
= color
.green
>> shift
;
5791 user_bg
.blue
= color
.blue
>> shift
;
5793 fn_png_set_background (png_ptr
, &user_bg
,
5794 PNG_BACKGROUND_GAMMA_SCREEN
, 0, 1.0);
5799 /* We use the current frame background, ignoring any default
5800 background color set by the image. */
5801 #if defined (HAVE_X_WINDOWS) || defined (HAVE_NTGUI)
5803 png_color_16 frame_background
;
5805 color
.pixel
= FRAME_BACKGROUND_PIXEL (f
);
5806 x_query_color (f
, &color
);
5808 memset (&frame_background
, 0, sizeof frame_background
);
5809 frame_background
.red
= color
.red
>> shift
;
5810 frame_background
.green
= color
.green
>> shift
;
5811 frame_background
.blue
= color
.blue
>> shift
;
5812 #endif /* HAVE_X_WINDOWS */
5814 fn_png_set_background (png_ptr
, &frame_background
,
5815 PNG_BACKGROUND_GAMMA_SCREEN
, 0, 1.0);
5819 /* Update info structure. */
5820 fn_png_read_update_info (png_ptr
, info_ptr
);
5822 /* Get number of channels. Valid values are 1 for grayscale images
5823 and images with a palette, 2 for grayscale images with transparency
5824 information (alpha channel), 3 for RGB images, and 4 for RGB
5825 images with alpha channel, i.e. RGBA. If conversions above were
5826 sufficient we should only have 3 or 4 channels here. */
5827 channels
= fn_png_get_channels (png_ptr
, info_ptr
);
5828 xassert (channels
== 3 || channels
== 4);
5830 /* Number of bytes needed for one row of the image. */
5831 row_bytes
= fn_png_get_rowbytes (png_ptr
, info_ptr
);
5833 /* Allocate memory for the image. */
5834 if (min (PTRDIFF_MAX
, SIZE_MAX
) / sizeof *rows
< height
5835 || min (PTRDIFF_MAX
, SIZE_MAX
) / sizeof *pixels
/ height
< row_bytes
)
5836 memory_full (SIZE_MAX
);
5837 pixels
= (png_byte
*) xmalloc (sizeof *pixels
* row_bytes
* height
);
5838 rows
= (png_byte
**) xmalloc (height
* sizeof *rows
);
5839 for (i
= 0; i
< height
; ++i
)
5840 rows
[i
] = pixels
+ i
* row_bytes
;
5842 /* Read the entire image. */
5843 fn_png_read_image (png_ptr
, rows
);
5844 fn_png_read_end (png_ptr
, info_ptr
);
5851 /* Create an image and pixmap serving as mask if the PNG image
5852 contains an alpha channel. */
5855 && !x_create_x_image_and_pixmap (f
, width
, height
, 1,
5856 &mask_img
, &img
->mask
))
5858 x_destroy_x_image (ximg
);
5859 Free_Pixmap (FRAME_X_DISPLAY (f
), img
->pixmap
);
5860 img
->pixmap
= NO_PIXMAP
;
5864 /* Fill the X image and mask from PNG data. */
5865 init_color_table ();
5867 for (y
= 0; y
< height
; ++y
)
5869 png_byte
*p
= rows
[y
];
5871 for (x
= 0; x
< width
; ++x
)
5878 XPutPixel (ximg
, x
, y
, lookup_rgb_color (f
, r
, g
, b
));
5879 /* An alpha channel, aka mask channel, associates variable
5880 transparency with an image. Where other image formats
5881 support binary transparency---fully transparent or fully
5882 opaque---PNG allows up to 254 levels of partial transparency.
5883 The PNG library implements partial transparency by combining
5884 the image with a specified background color.
5886 I'm not sure how to handle this here nicely: because the
5887 background on which the image is displayed may change, for
5888 real alpha channel support, it would be necessary to create
5889 a new image for each possible background.
5891 What I'm doing now is that a mask is created if we have
5892 boolean transparency information. Otherwise I'm using
5893 the frame's background color to combine the image with. */
5898 XPutPixel (mask_img
, x
, y
, *p
> 0 ? PIX_MASK_DRAW
: PIX_MASK_RETAIN
);
5904 if (NILP (image_spec_value (img
->spec
, QCbackground
, NULL
)))
5905 /* Set IMG's background color from the PNG image, unless the user
5909 if (fn_png_get_bKGD (png_ptr
, info_ptr
, &bg
))
5911 img
->background
= lookup_rgb_color (f
, bg
->red
, bg
->green
, bg
->blue
);
5912 img
->background_valid
= 1;
5916 #ifdef COLOR_TABLE_SUPPORT
5917 /* Remember colors allocated for this image. */
5918 img
->colors
= colors_in_color_table (&img
->ncolors
);
5919 free_color_table ();
5920 #endif /* COLOR_TABLE_SUPPORT */
5923 fn_png_destroy_read_struct (&png_ptr
, &info_ptr
, &end_info
);
5928 img
->height
= height
;
5930 /* Maybe fill in the background field while we have ximg handy.
5931 Casting avoids a GCC warning. */
5932 IMAGE_BACKGROUND (img
, f
, (XImagePtr_or_DC
)ximg
);
5934 /* Put the image into the pixmap, then free the X image and its buffer. */
5935 x_put_x_image (f
, ximg
, img
->pixmap
, width
, height
);
5936 x_destroy_x_image (ximg
);
5938 /* Same for the mask. */
5941 /* Fill in the background_transparent field while we have the
5942 mask handy. Casting avoids a GCC warning. */
5943 image_background_transparent (img
, f
, (XImagePtr_or_DC
)mask_img
);
5945 x_put_x_image (f
, mask_img
, img
->mask
, img
->width
, img
->height
);
5946 x_destroy_x_image (mask_img
);
5952 #else /* HAVE_PNG */
5956 png_load (struct frame
*f
, struct image
*img
)
5958 return ns_load_image(f
, img
,
5959 image_spec_value (img
->spec
, QCfile
, NULL
),
5960 image_spec_value (img
->spec
, QCdata
, NULL
));
5962 #endif /* HAVE_NS */
5965 #endif /* !HAVE_PNG */
5969 /***********************************************************************
5971 ***********************************************************************/
5973 #if defined (HAVE_JPEG) || defined (HAVE_NS)
5975 static int jpeg_image_p (Lisp_Object object
);
5976 static int jpeg_load (struct frame
*f
, struct image
*img
);
5978 /* The symbol `jpeg' identifying images of this type. */
5980 static Lisp_Object Qjpeg
;
5982 /* Indices of image specification fields in gs_format, below. */
5984 enum jpeg_keyword_index
5993 JPEG_HEURISTIC_MASK
,
5999 /* Vector of image_keyword structures describing the format
6000 of valid user-defined image specifications. */
6002 static const struct image_keyword jpeg_format
[JPEG_LAST
] =
6004 {":type", IMAGE_SYMBOL_VALUE
, 1},
6005 {":data", IMAGE_STRING_VALUE
, 0},
6006 {":file", IMAGE_STRING_VALUE
, 0},
6007 {":ascent", IMAGE_ASCENT_VALUE
, 0},
6008 {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR
, 0},
6009 {":relief", IMAGE_INTEGER_VALUE
, 0},
6010 {":conversions", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
6011 {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
6012 {":mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
6013 {":background", IMAGE_STRING_OR_NIL_VALUE
, 0}
6016 /* Structure describing the image type `jpeg'. */
6018 static struct image_type jpeg_type
=
6027 /* Return non-zero if OBJECT is a valid JPEG image specification. */
6030 jpeg_image_p (Lisp_Object object
)
6032 struct image_keyword fmt
[JPEG_LAST
];
6034 memcpy (fmt
, jpeg_format
, sizeof fmt
);
6036 if (!parse_image_spec (object
, fmt
, JPEG_LAST
, Qjpeg
))
6039 /* Must specify either the :data or :file keyword. */
6040 return fmt
[JPEG_FILE
].count
+ fmt
[JPEG_DATA
].count
== 1;
6043 #endif /* HAVE_JPEG || HAVE_NS */
6047 /* Work around a warning about HAVE_STDLIB_H being redefined in
6049 #ifdef HAVE_STDLIB_H
6050 #undef HAVE_STDLIB_H
6051 #endif /* HAVE_STLIB_H */
6053 #if defined (HAVE_NTGUI) && !defined (__WIN32__)
6054 /* In older releases of the jpeg library, jpeglib.h will define boolean
6055 differently depending on __WIN32__, so make sure it is defined. */
6059 #include <jpeglib.h>
6062 #ifdef HAVE_STLIB_H_1
6063 #define HAVE_STDLIB_H 1
6068 /* JPEG library details. */
6069 DEF_IMGLIB_FN (void, jpeg_CreateDecompress
, (j_decompress_ptr
, int, size_t));
6070 DEF_IMGLIB_FN (boolean
, jpeg_start_decompress
, (j_decompress_ptr
));
6071 DEF_IMGLIB_FN (boolean
, jpeg_finish_decompress
, (j_decompress_ptr
));
6072 DEF_IMGLIB_FN (void, jpeg_destroy_decompress
, (j_decompress_ptr
));
6073 DEF_IMGLIB_FN (int, jpeg_read_header
, (j_decompress_ptr
, boolean
));
6074 DEF_IMGLIB_FN (JDIMENSION
, jpeg_read_scanlines
, (j_decompress_ptr
, JSAMPARRAY
, JDIMENSION
));
6075 DEF_IMGLIB_FN (struct jpeg_error_mgr
*, jpeg_std_error
, (struct jpeg_error_mgr
*));
6076 DEF_IMGLIB_FN (boolean
, jpeg_resync_to_restart
, (j_decompress_ptr
, int));
6079 init_jpeg_functions (Lisp_Object libraries
)
6083 if (!(library
= w32_delayed_load (libraries
, Qjpeg
)))
6086 LOAD_IMGLIB_FN (library
, jpeg_finish_decompress
);
6087 LOAD_IMGLIB_FN (library
, jpeg_read_scanlines
);
6088 LOAD_IMGLIB_FN (library
, jpeg_start_decompress
);
6089 LOAD_IMGLIB_FN (library
, jpeg_read_header
);
6090 LOAD_IMGLIB_FN (library
, jpeg_CreateDecompress
);
6091 LOAD_IMGLIB_FN (library
, jpeg_destroy_decompress
);
6092 LOAD_IMGLIB_FN (library
, jpeg_std_error
);
6093 LOAD_IMGLIB_FN (library
, jpeg_resync_to_restart
);
6097 /* Wrapper since we can't directly assign the function pointer
6098 to another function pointer that was declared more completely easily. */
6100 jpeg_resync_to_restart_wrapper (j_decompress_ptr cinfo
, int desired
)
6102 return fn_jpeg_resync_to_restart (cinfo
, desired
);
6107 #define fn_jpeg_CreateDecompress(a,b,c) jpeg_create_decompress(a)
6108 #define fn_jpeg_start_decompress jpeg_start_decompress
6109 #define fn_jpeg_finish_decompress jpeg_finish_decompress
6110 #define fn_jpeg_destroy_decompress jpeg_destroy_decompress
6111 #define fn_jpeg_read_header jpeg_read_header
6112 #define fn_jpeg_read_scanlines jpeg_read_scanlines
6113 #define fn_jpeg_std_error jpeg_std_error
6114 #define jpeg_resync_to_restart_wrapper jpeg_resync_to_restart
6116 #endif /* HAVE_NTGUI */
6118 struct my_jpeg_error_mgr
6120 struct jpeg_error_mgr pub
;
6121 jmp_buf setjmp_buffer
;
6125 static void my_error_exit (j_common_ptr
) NO_RETURN
;
6127 my_error_exit (j_common_ptr cinfo
)
6129 struct my_jpeg_error_mgr
*mgr
= (struct my_jpeg_error_mgr
*) cinfo
->err
;
6130 longjmp (mgr
->setjmp_buffer
, 1);
6134 /* Init source method for JPEG data source manager. Called by
6135 jpeg_read_header() before any data is actually read. See
6136 libjpeg.doc from the JPEG lib distribution. */
6139 our_common_init_source (j_decompress_ptr cinfo
)
6144 /* Method to terminate data source. Called by
6145 jpeg_finish_decompress() after all data has been processed. */
6148 our_common_term_source (j_decompress_ptr cinfo
)
6153 /* Fill input buffer method for JPEG data source manager. Called
6154 whenever more data is needed. We read the whole image in one step,
6155 so this only adds a fake end of input marker at the end. */
6157 static JOCTET our_memory_buffer
[2];
6160 our_memory_fill_input_buffer (j_decompress_ptr cinfo
)
6162 /* Insert a fake EOI marker. */
6163 struct jpeg_source_mgr
*src
= cinfo
->src
;
6165 our_memory_buffer
[0] = (JOCTET
) 0xFF;
6166 our_memory_buffer
[1] = (JOCTET
) JPEG_EOI
;
6168 src
->next_input_byte
= our_memory_buffer
;
6169 src
->bytes_in_buffer
= 2;
6174 /* Method to skip over NUM_BYTES bytes in the image data. CINFO->src
6175 is the JPEG data source manager. */
6178 our_memory_skip_input_data (j_decompress_ptr cinfo
, long int num_bytes
)
6180 struct jpeg_source_mgr
*src
= (struct jpeg_source_mgr
*) cinfo
->src
;
6184 if (num_bytes
> src
->bytes_in_buffer
)
6185 ERREXIT (cinfo
, JERR_INPUT_EOF
);
6187 src
->bytes_in_buffer
-= num_bytes
;
6188 src
->next_input_byte
+= num_bytes
;
6193 /* Set up the JPEG lib for reading an image from DATA which contains
6194 LEN bytes. CINFO is the decompression info structure created for
6195 reading the image. */
6198 jpeg_memory_src (j_decompress_ptr cinfo
, JOCTET
*data
, unsigned int len
)
6200 struct jpeg_source_mgr
*src
;
6202 if (cinfo
->src
== NULL
)
6204 /* First time for this JPEG object? */
6205 cinfo
->src
= (struct jpeg_source_mgr
*)
6206 (*cinfo
->mem
->alloc_small
) ((j_common_ptr
) cinfo
, JPOOL_PERMANENT
,
6207 sizeof (struct jpeg_source_mgr
));
6208 src
= (struct jpeg_source_mgr
*) cinfo
->src
;
6209 src
->next_input_byte
= data
;
6212 src
= (struct jpeg_source_mgr
*) cinfo
->src
;
6213 src
->init_source
= our_common_init_source
;
6214 src
->fill_input_buffer
= our_memory_fill_input_buffer
;
6215 src
->skip_input_data
= our_memory_skip_input_data
;
6216 src
->resync_to_restart
= jpeg_resync_to_restart_wrapper
; /* Use default method. */
6217 src
->term_source
= our_common_term_source
;
6218 src
->bytes_in_buffer
= len
;
6219 src
->next_input_byte
= data
;
6223 struct jpeg_stdio_mgr
6225 struct jpeg_source_mgr mgr
;
6232 /* Size of buffer to read JPEG from file.
6233 Not too big, as we want to use alloc_small. */
6234 #define JPEG_STDIO_BUFFER_SIZE 8192
6237 /* Fill input buffer method for JPEG data source manager. Called
6238 whenever more data is needed. The data is read from a FILE *. */
6241 our_stdio_fill_input_buffer (j_decompress_ptr cinfo
)
6243 struct jpeg_stdio_mgr
*src
;
6245 src
= (struct jpeg_stdio_mgr
*) cinfo
->src
;
6250 bytes
= fread (src
->buffer
, 1, JPEG_STDIO_BUFFER_SIZE
, src
->file
);
6252 src
->mgr
.bytes_in_buffer
= bytes
;
6255 WARNMS (cinfo
, JWRN_JPEG_EOF
);
6257 src
->buffer
[0] = (JOCTET
) 0xFF;
6258 src
->buffer
[1] = (JOCTET
) JPEG_EOI
;
6259 src
->mgr
.bytes_in_buffer
= 2;
6261 src
->mgr
.next_input_byte
= src
->buffer
;
6268 /* Method to skip over NUM_BYTES bytes in the image data. CINFO->src
6269 is the JPEG data source manager. */
6272 our_stdio_skip_input_data (j_decompress_ptr cinfo
, long int num_bytes
)
6274 struct jpeg_stdio_mgr
*src
;
6275 src
= (struct jpeg_stdio_mgr
*) cinfo
->src
;
6277 while (num_bytes
> 0 && !src
->finished
)
6279 if (num_bytes
<= src
->mgr
.bytes_in_buffer
)
6281 src
->mgr
.bytes_in_buffer
-= num_bytes
;
6282 src
->mgr
.next_input_byte
+= num_bytes
;
6287 num_bytes
-= src
->mgr
.bytes_in_buffer
;
6288 src
->mgr
.bytes_in_buffer
= 0;
6289 src
->mgr
.next_input_byte
= NULL
;
6291 our_stdio_fill_input_buffer (cinfo
);
6297 /* Set up the JPEG lib for reading an image from a FILE *.
6298 CINFO is the decompression info structure created for
6299 reading the image. */
6302 jpeg_file_src (j_decompress_ptr cinfo
, FILE *fp
)
6304 struct jpeg_stdio_mgr
*src
;
6306 if (cinfo
->src
!= NULL
)
6307 src
= (struct jpeg_stdio_mgr
*) cinfo
->src
;
6310 /* First time for this JPEG object? */
6311 cinfo
->src
= (struct jpeg_source_mgr
*)
6312 (*cinfo
->mem
->alloc_small
) ((j_common_ptr
) cinfo
, JPOOL_PERMANENT
,
6313 sizeof (struct jpeg_stdio_mgr
));
6314 src
= (struct jpeg_stdio_mgr
*) cinfo
->src
;
6315 src
->buffer
= (JOCTET
*)
6316 (*cinfo
->mem
->alloc_small
) ((j_common_ptr
) cinfo
, JPOOL_PERMANENT
,
6317 JPEG_STDIO_BUFFER_SIZE
);
6322 src
->mgr
.init_source
= our_common_init_source
;
6323 src
->mgr
.fill_input_buffer
= our_stdio_fill_input_buffer
;
6324 src
->mgr
.skip_input_data
= our_stdio_skip_input_data
;
6325 src
->mgr
.resync_to_restart
= jpeg_resync_to_restart_wrapper
; /* Use default method. */
6326 src
->mgr
.term_source
= our_common_term_source
;
6327 src
->mgr
.bytes_in_buffer
= 0;
6328 src
->mgr
.next_input_byte
= NULL
;
6332 /* Load image IMG for use on frame F. Patterned after example.c
6333 from the JPEG lib. */
6336 jpeg_load (struct frame
*f
, struct image
*img
)
6338 struct jpeg_decompress_struct cinfo
;
6339 struct my_jpeg_error_mgr mgr
;
6340 Lisp_Object file
, specified_file
;
6341 Lisp_Object specified_data
;
6342 FILE * volatile fp
= NULL
;
6344 int row_stride
, x
, y
;
6345 XImagePtr ximg
= NULL
;
6347 unsigned long *colors
;
6350 /* Open the JPEG file. */
6351 specified_file
= image_spec_value (img
->spec
, QCfile
, NULL
);
6352 specified_data
= image_spec_value (img
->spec
, QCdata
, NULL
);
6354 if (NILP (specified_data
))
6356 file
= x_find_image_file (specified_file
);
6357 if (!STRINGP (file
))
6359 image_error ("Cannot find image file `%s'", specified_file
, Qnil
);
6363 fp
= fopen (SSDATA (file
), "rb");
6366 image_error ("Cannot open `%s'", file
, Qnil
);
6370 else if (!STRINGP (specified_data
))
6372 image_error ("Invalid image data `%s'", specified_data
, Qnil
);
6376 /* Customize libjpeg's error handling to call my_error_exit when an
6377 error is detected. This function will perform a longjmp. */
6378 cinfo
.err
= fn_jpeg_std_error (&mgr
.pub
);
6379 mgr
.pub
.error_exit
= my_error_exit
;
6381 if ((rc
= setjmp (mgr
.setjmp_buffer
)) != 0)
6385 /* Called from my_error_exit. Display a JPEG error. */
6386 char buf
[JMSG_LENGTH_MAX
];
6387 cinfo
.err
->format_message ((j_common_ptr
) &cinfo
, buf
);
6388 image_error ("Error reading JPEG image `%s': %s", img
->spec
,
6389 build_string (buf
));
6392 /* Close the input file and destroy the JPEG object. */
6394 fclose ((FILE *) fp
);
6395 fn_jpeg_destroy_decompress (&cinfo
);
6397 /* If we already have an XImage, free that. */
6398 x_destroy_x_image (ximg
);
6400 /* Free pixmap and colors. */
6401 x_clear_image (f
, img
);
6405 /* Create the JPEG decompression object. Let it read from fp.
6406 Read the JPEG image header. */
6407 fn_jpeg_CreateDecompress (&cinfo
, JPEG_LIB_VERSION
, sizeof (cinfo
));
6409 if (NILP (specified_data
))
6410 jpeg_file_src (&cinfo
, (FILE *) fp
);
6412 jpeg_memory_src (&cinfo
, SDATA (specified_data
),
6413 SBYTES (specified_data
));
6415 fn_jpeg_read_header (&cinfo
, 1);
6417 /* Customize decompression so that color quantization will be used.
6418 Start decompression. */
6419 cinfo
.quantize_colors
= 1;
6420 fn_jpeg_start_decompress (&cinfo
);
6421 width
= img
->width
= cinfo
.output_width
;
6422 height
= img
->height
= cinfo
.output_height
;
6424 if (!check_image_size (f
, width
, height
))
6426 image_error ("Invalid image size (see `max-image-size')", Qnil
, Qnil
);
6427 longjmp (mgr
.setjmp_buffer
, 2);
6430 /* Create X image and pixmap. */
6431 if (!x_create_x_image_and_pixmap (f
, width
, height
, 0, &ximg
, &img
->pixmap
))
6432 longjmp (mgr
.setjmp_buffer
, 2);
6434 /* Allocate colors. When color quantization is used,
6435 cinfo.actual_number_of_colors has been set with the number of
6436 colors generated, and cinfo.colormap is a two-dimensional array
6437 of color indices in the range 0..cinfo.actual_number_of_colors.
6438 No more than 255 colors will be generated. */
6442 if (cinfo
.out_color_components
> 2)
6443 ir
= 0, ig
= 1, ib
= 2;
6444 else if (cinfo
.out_color_components
> 1)
6445 ir
= 0, ig
= 1, ib
= 0;
6447 ir
= 0, ig
= 0, ib
= 0;
6449 /* Use the color table mechanism because it handles colors that
6450 cannot be allocated nicely. Such colors will be replaced with
6451 a default color, and we don't have to care about which colors
6452 can be freed safely, and which can't. */
6453 init_color_table ();
6454 colors
= (unsigned long *) alloca (cinfo
.actual_number_of_colors
6457 for (i
= 0; i
< cinfo
.actual_number_of_colors
; ++i
)
6459 /* Multiply RGB values with 255 because X expects RGB values
6460 in the range 0..0xffff. */
6461 int r
= cinfo
.colormap
[ir
][i
] << 8;
6462 int g
= cinfo
.colormap
[ig
][i
] << 8;
6463 int b
= cinfo
.colormap
[ib
][i
] << 8;
6464 colors
[i
] = lookup_rgb_color (f
, r
, g
, b
);
6467 #ifdef COLOR_TABLE_SUPPORT
6468 /* Remember those colors actually allocated. */
6469 img
->colors
= colors_in_color_table (&img
->ncolors
);
6470 free_color_table ();
6471 #endif /* COLOR_TABLE_SUPPORT */
6475 row_stride
= width
* cinfo
.output_components
;
6476 buffer
= cinfo
.mem
->alloc_sarray ((j_common_ptr
) &cinfo
, JPOOL_IMAGE
,
6478 for (y
= 0; y
< height
; ++y
)
6480 fn_jpeg_read_scanlines (&cinfo
, buffer
, 1);
6481 for (x
= 0; x
< cinfo
.output_width
; ++x
)
6482 XPutPixel (ximg
, x
, y
, colors
[buffer
[0][x
]]);
6486 fn_jpeg_finish_decompress (&cinfo
);
6487 fn_jpeg_destroy_decompress (&cinfo
);
6489 fclose ((FILE *) fp
);
6491 /* Maybe fill in the background field while we have ximg handy. */
6492 if (NILP (image_spec_value (img
->spec
, QCbackground
, NULL
)))
6493 /* Casting avoids a GCC warning. */
6494 IMAGE_BACKGROUND (img
, f
, (XImagePtr_or_DC
)ximg
);
6496 /* Put the image into the pixmap. */
6497 x_put_x_image (f
, ximg
, img
->pixmap
, width
, height
);
6498 x_destroy_x_image (ximg
);
6502 #else /* HAVE_JPEG */
6506 jpeg_load (struct frame
*f
, struct image
*img
)
6508 return ns_load_image (f
, img
,
6509 image_spec_value (img
->spec
, QCfile
, NULL
),
6510 image_spec_value (img
->spec
, QCdata
, NULL
));
6512 #endif /* HAVE_NS */
6514 #endif /* !HAVE_JPEG */
6518 /***********************************************************************
6520 ***********************************************************************/
6522 #if defined (HAVE_TIFF) || defined (HAVE_NS)
6524 static int tiff_image_p (Lisp_Object object
);
6525 static int tiff_load (struct frame
*f
, struct image
*img
);
6527 /* The symbol `tiff' identifying images of this type. */
6529 static Lisp_Object Qtiff
;
6531 /* Indices of image specification fields in tiff_format, below. */
6533 enum tiff_keyword_index
6542 TIFF_HEURISTIC_MASK
,
6549 /* Vector of image_keyword structures describing the format
6550 of valid user-defined image specifications. */
6552 static const struct image_keyword tiff_format
[TIFF_LAST
] =
6554 {":type", IMAGE_SYMBOL_VALUE
, 1},
6555 {":data", IMAGE_STRING_VALUE
, 0},
6556 {":file", IMAGE_STRING_VALUE
, 0},
6557 {":ascent", IMAGE_ASCENT_VALUE
, 0},
6558 {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR
, 0},
6559 {":relief", IMAGE_INTEGER_VALUE
, 0},
6560 {":conversions", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
6561 {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
6562 {":mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
6563 {":background", IMAGE_STRING_OR_NIL_VALUE
, 0},
6564 {":index", IMAGE_NON_NEGATIVE_INTEGER_VALUE
, 0}
6567 /* Structure describing the image type `tiff'. */
6569 static struct image_type tiff_type
=
6578 /* Return non-zero if OBJECT is a valid TIFF image specification. */
6581 tiff_image_p (Lisp_Object object
)
6583 struct image_keyword fmt
[TIFF_LAST
];
6584 memcpy (fmt
, tiff_format
, sizeof fmt
);
6586 if (!parse_image_spec (object
, fmt
, TIFF_LAST
, Qtiff
))
6589 /* Must specify either the :data or :file keyword. */
6590 return fmt
[TIFF_FILE
].count
+ fmt
[TIFF_DATA
].count
== 1;
6593 #endif /* HAVE_TIFF || HAVE_NS */
6601 /* TIFF library details. */
6602 DEF_IMGLIB_FN (TIFFErrorHandler
, TIFFSetErrorHandler
, (TIFFErrorHandler
));
6603 DEF_IMGLIB_FN (TIFFErrorHandler
, TIFFSetWarningHandler
, (TIFFErrorHandler
));
6604 DEF_IMGLIB_FN (TIFF
*, TIFFOpen
, (const char *, const char *));
6605 DEF_IMGLIB_FN (TIFF
*, TIFFClientOpen
, (const char *, const char *, thandle_t
,
6606 TIFFReadWriteProc
, TIFFReadWriteProc
,
6607 TIFFSeekProc
, TIFFCloseProc
, TIFFSizeProc
,
6608 TIFFMapFileProc
, TIFFUnmapFileProc
));
6609 DEF_IMGLIB_FN (int, TIFFGetField
, (TIFF
*, ttag_t
, ...));
6610 DEF_IMGLIB_FN (int, TIFFReadRGBAImage
, (TIFF
*, uint32
, uint32
, uint32
*, int));
6611 DEF_IMGLIB_FN (void, TIFFClose
, (TIFF
*));
6612 DEF_IMGLIB_FN (int, TIFFSetDirectory
, (TIFF
*, tdir_t
));
6615 init_tiff_functions (Lisp_Object libraries
)
6619 if (!(library
= w32_delayed_load (libraries
, Qtiff
)))
6622 LOAD_IMGLIB_FN (library
, TIFFSetErrorHandler
);
6623 LOAD_IMGLIB_FN (library
, TIFFSetWarningHandler
);
6624 LOAD_IMGLIB_FN (library
, TIFFOpen
);
6625 LOAD_IMGLIB_FN (library
, TIFFClientOpen
);
6626 LOAD_IMGLIB_FN (library
, TIFFGetField
);
6627 LOAD_IMGLIB_FN (library
, TIFFReadRGBAImage
);
6628 LOAD_IMGLIB_FN (library
, TIFFClose
);
6629 LOAD_IMGLIB_FN (library
, TIFFSetDirectory
);
6635 #define fn_TIFFSetErrorHandler TIFFSetErrorHandler
6636 #define fn_TIFFSetWarningHandler TIFFSetWarningHandler
6637 #define fn_TIFFOpen TIFFOpen
6638 #define fn_TIFFClientOpen TIFFClientOpen
6639 #define fn_TIFFGetField TIFFGetField
6640 #define fn_TIFFReadRGBAImage TIFFReadRGBAImage
6641 #define fn_TIFFClose TIFFClose
6642 #define fn_TIFFSetDirectory TIFFSetDirectory
6643 #endif /* HAVE_NTGUI */
6646 /* Reading from a memory buffer for TIFF images Based on the PNG
6647 memory source, but we have to provide a lot of extra functions.
6650 We really only need to implement read and seek, but I am not
6651 convinced that the TIFF library is smart enough not to destroy
6652 itself if we only hand it the function pointers we need to
6657 unsigned char *bytes
;
6664 tiff_read_from_memory (thandle_t data
, tdata_t buf
, tsize_t size
)
6666 tiff_memory_source
*src
= (tiff_memory_source
*) data
;
6668 size
= min (size
, src
->len
- src
->index
);
6669 memcpy (buf
, src
->bytes
+ src
->index
, size
);
6675 tiff_write_from_memory (thandle_t data
, tdata_t buf
, tsize_t size
)
6681 tiff_seek_in_memory (thandle_t data
, toff_t off
, int whence
)
6683 tiff_memory_source
*src
= (tiff_memory_source
*) data
;
6688 case SEEK_SET
: /* Go from beginning of source. */
6692 case SEEK_END
: /* Go from end of source. */
6693 idx
= src
->len
+ off
;
6696 case SEEK_CUR
: /* Go from current position. */
6697 idx
= src
->index
+ off
;
6700 default: /* Invalid `whence'. */
6704 if (idx
> src
->len
|| idx
< 0)
6712 tiff_close_memory (thandle_t data
)
6719 tiff_mmap_memory (thandle_t data
, tdata_t
*pbase
, toff_t
*psize
)
6721 /* It is already _IN_ memory. */
6726 tiff_unmap_memory (thandle_t data
, tdata_t base
, toff_t size
)
6728 /* We don't need to do this. */
6732 tiff_size_of_memory (thandle_t data
)
6734 return ((tiff_memory_source
*) data
)->len
;
6738 static void tiff_error_handler (const char *, const char *, va_list)
6739 ATTRIBUTE_FORMAT_PRINTF (2, 0);
6741 tiff_error_handler (const char *title
, const char *format
, va_list ap
)
6746 len
= sprintf (buf
, "TIFF error: %s ", title
);
6747 vsprintf (buf
+ len
, format
, ap
);
6748 add_to_log (buf
, Qnil
, Qnil
);
6752 static void tiff_warning_handler (const char *, const char *, va_list)
6753 ATTRIBUTE_FORMAT_PRINTF (2, 0);
6755 tiff_warning_handler (const char *title
, const char *format
, va_list ap
)
6760 len
= sprintf (buf
, "TIFF warning: %s ", title
);
6761 vsprintf (buf
+ len
, format
, ap
);
6762 add_to_log (buf
, Qnil
, Qnil
);
6766 /* Load TIFF image IMG for use on frame F. Value is non-zero if
6770 tiff_load (struct frame
*f
, struct image
*img
)
6772 Lisp_Object file
, specified_file
;
6773 Lisp_Object specified_data
;
6775 int width
, height
, x
, y
, count
;
6779 tiff_memory_source memsrc
;
6782 specified_file
= image_spec_value (img
->spec
, QCfile
, NULL
);
6783 specified_data
= image_spec_value (img
->spec
, QCdata
, NULL
);
6785 fn_TIFFSetErrorHandler ((TIFFErrorHandler
) tiff_error_handler
);
6786 fn_TIFFSetWarningHandler ((TIFFErrorHandler
) tiff_warning_handler
);
6788 if (NILP (specified_data
))
6790 /* Read from a file */
6791 file
= x_find_image_file (specified_file
);
6792 if (!STRINGP (file
))
6794 image_error ("Cannot find image file `%s'", specified_file
, Qnil
);
6798 /* Try to open the image file. */
6799 tiff
= fn_TIFFOpen (SSDATA (file
), "r");
6802 image_error ("Cannot open `%s'", file
, Qnil
);
6808 if (!STRINGP (specified_data
))
6810 image_error ("Invalid image data `%s'", specified_data
, Qnil
);
6814 /* Memory source! */
6815 memsrc
.bytes
= SDATA (specified_data
);
6816 memsrc
.len
= SBYTES (specified_data
);
6819 tiff
= fn_TIFFClientOpen ("memory_source", "r", (thandle_t
)&memsrc
,
6820 tiff_read_from_memory
,
6821 tiff_write_from_memory
,
6822 tiff_seek_in_memory
,
6824 tiff_size_of_memory
,
6830 image_error ("Cannot open memory source for `%s'", img
->spec
, Qnil
);
6835 image
= image_spec_value (img
->spec
, QCindex
, NULL
);
6836 if (INTEGERP (image
))
6838 int ino
= XFASTINT (image
);
6839 if (!fn_TIFFSetDirectory (tiff
, ino
))
6841 image_error ("Invalid image number `%s' in image `%s'",
6843 fn_TIFFClose (tiff
);
6848 /* Get width and height of the image, and allocate a raster buffer
6849 of width x height 32-bit values. */
6850 fn_TIFFGetField (tiff
, TIFFTAG_IMAGEWIDTH
, &width
);
6851 fn_TIFFGetField (tiff
, TIFFTAG_IMAGELENGTH
, &height
);
6853 if (!check_image_size (f
, width
, height
))
6855 image_error ("Invalid image size (see `max-image-size')", Qnil
, Qnil
);
6856 fn_TIFFClose (tiff
);
6860 /* Create the X image and pixmap. */
6861 if (! (height
<= min (PTRDIFF_MAX
, SIZE_MAX
) / sizeof *buf
/ width
6862 && x_create_x_image_and_pixmap (f
, width
, height
, 0,
6863 &ximg
, &img
->pixmap
)))
6865 fn_TIFFClose (tiff
);
6869 buf
= (uint32
*) xmalloc (sizeof *buf
* width
* height
);
6871 rc
= fn_TIFFReadRGBAImage (tiff
, width
, height
, buf
, 0);
6873 /* Count the number of images in the file. */
6874 for (count
= 1; fn_TIFFSetDirectory (tiff
, count
); count
++)
6878 img
->lisp_data
= Fcons (Qcount
,
6879 Fcons (make_number (count
),
6882 fn_TIFFClose (tiff
);
6885 image_error ("Error reading TIFF image `%s'", img
->spec
, Qnil
);
6890 /* Initialize the color table. */
6891 init_color_table ();
6893 /* Process the pixel raster. Origin is in the lower-left corner. */
6894 for (y
= 0; y
< height
; ++y
)
6896 uint32
*row
= buf
+ y
* width
;
6898 for (x
= 0; x
< width
; ++x
)
6900 uint32 abgr
= row
[x
];
6901 int r
= TIFFGetR (abgr
) << 8;
6902 int g
= TIFFGetG (abgr
) << 8;
6903 int b
= TIFFGetB (abgr
) << 8;
6904 XPutPixel (ximg
, x
, height
- 1 - y
, lookup_rgb_color (f
, r
, g
, b
));
6908 #ifdef COLOR_TABLE_SUPPORT
6909 /* Remember the colors allocated for the image. Free the color table. */
6910 img
->colors
= colors_in_color_table (&img
->ncolors
);
6911 free_color_table ();
6912 #endif /* COLOR_TABLE_SUPPORT */
6915 img
->height
= height
;
6917 /* Maybe fill in the background field while we have ximg handy. */
6918 if (NILP (image_spec_value (img
->spec
, QCbackground
, NULL
)))
6919 /* Casting avoids a GCC warning on W32. */
6920 IMAGE_BACKGROUND (img
, f
, (XImagePtr_or_DC
)ximg
);
6922 /* Put the image into the pixmap, then free the X image and its buffer. */
6923 x_put_x_image (f
, ximg
, img
->pixmap
, width
, height
);
6924 x_destroy_x_image (ximg
);
6930 #else /* HAVE_TIFF */
6934 tiff_load (struct frame
*f
, struct image
*img
)
6936 return ns_load_image (f
, img
,
6937 image_spec_value (img
->spec
, QCfile
, NULL
),
6938 image_spec_value (img
->spec
, QCdata
, NULL
));
6940 #endif /* HAVE_NS */
6942 #endif /* !HAVE_TIFF */
6946 /***********************************************************************
6948 ***********************************************************************/
6950 #if defined (HAVE_GIF) || defined (HAVE_NS)
6952 static int gif_image_p (Lisp_Object object
);
6953 static int gif_load (struct frame
*f
, struct image
*img
);
6954 static void gif_clear_image (struct frame
*f
, struct image
*img
);
6956 /* The symbol `gif' identifying images of this type. */
6958 static Lisp_Object Qgif
;
6960 /* Indices of image specification fields in gif_format, below. */
6962 enum gif_keyword_index
6978 /* Vector of image_keyword structures describing the format
6979 of valid user-defined image specifications. */
6981 static const struct image_keyword gif_format
[GIF_LAST
] =
6983 {":type", IMAGE_SYMBOL_VALUE
, 1},
6984 {":data", IMAGE_STRING_VALUE
, 0},
6985 {":file", IMAGE_STRING_VALUE
, 0},
6986 {":ascent", IMAGE_ASCENT_VALUE
, 0},
6987 {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR
, 0},
6988 {":relief", IMAGE_INTEGER_VALUE
, 0},
6989 {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
6990 {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
6991 {":mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
6992 {":index", IMAGE_NON_NEGATIVE_INTEGER_VALUE
, 0},
6993 {":background", IMAGE_STRING_OR_NIL_VALUE
, 0}
6996 /* Structure describing the image type `gif'. */
6998 static struct image_type gif_type
=
7007 /* Free X resources of GIF image IMG which is used on frame F. */
7010 gif_clear_image (struct frame
*f
, struct image
*img
)
7012 img
->lisp_data
= Qnil
;
7013 x_clear_image (f
, img
);
7016 /* Return non-zero if OBJECT is a valid GIF image specification. */
7019 gif_image_p (Lisp_Object object
)
7021 struct image_keyword fmt
[GIF_LAST
];
7022 memcpy (fmt
, gif_format
, sizeof fmt
);
7024 if (!parse_image_spec (object
, fmt
, GIF_LAST
, Qgif
))
7027 /* Must specify either the :data or :file keyword. */
7028 return fmt
[GIF_FILE
].count
+ fmt
[GIF_DATA
].count
== 1;
7031 #endif /* HAVE_GIF */
7035 #if defined (HAVE_NTGUI)
7036 /* winuser.h might define DrawText to DrawTextA or DrawTextW.
7037 Undefine before redefining to avoid a preprocessor warning. */
7041 /* avoid conflict with QuickdrawText.h */
7042 #define DrawText gif_DrawText
7043 #include <gif_lib.h>
7046 #else /* HAVE_NTGUI */
7048 #include <gif_lib.h>
7050 #endif /* HAVE_NTGUI */
7055 /* GIF library details. */
7056 DEF_IMGLIB_FN (int, DGifCloseFile
, (GifFileType
*));
7057 DEF_IMGLIB_FN (int, DGifSlurp
, (GifFileType
*));
7058 DEF_IMGLIB_FN (GifFileType
*, DGifOpen
, (void *, InputFunc
));
7059 DEF_IMGLIB_FN (GifFileType
*, DGifOpenFileName
, (const char *));
7062 init_gif_functions (Lisp_Object libraries
)
7066 if (!(library
= w32_delayed_load (libraries
, Qgif
)))
7069 LOAD_IMGLIB_FN (library
, DGifCloseFile
);
7070 LOAD_IMGLIB_FN (library
, DGifSlurp
);
7071 LOAD_IMGLIB_FN (library
, DGifOpen
);
7072 LOAD_IMGLIB_FN (library
, DGifOpenFileName
);
7078 #define fn_DGifCloseFile DGifCloseFile
7079 #define fn_DGifSlurp DGifSlurp
7080 #define fn_DGifOpen DGifOpen
7081 #define fn_DGifOpenFileName DGifOpenFileName
7083 #endif /* HAVE_NTGUI */
7085 /* Reading a GIF image from memory
7086 Based on the PNG memory stuff to a certain extent. */
7090 unsigned char *bytes
;
7096 /* Make the current memory source available to gif_read_from_memory.
7097 It's done this way because not all versions of libungif support
7098 a UserData field in the GifFileType structure. */
7099 static gif_memory_source
*current_gif_memory_src
;
7102 gif_read_from_memory (GifFileType
*file
, GifByteType
*buf
, int len
)
7104 gif_memory_source
*src
= current_gif_memory_src
;
7106 if (len
> src
->len
- src
->index
)
7109 memcpy (buf
, src
->bytes
+ src
->index
, len
);
7115 /* Load GIF image IMG for use on frame F. Value is non-zero if
7118 static const int interlace_start
[] = {0, 4, 2, 1};
7119 static const int interlace_increment
[] = {8, 8, 4, 2};
7121 #define GIF_LOCAL_DESCRIPTOR_EXTENSION 249
7124 gif_load (struct frame
*f
, struct image
*img
)
7127 int rc
, width
, height
, x
, y
, i
, j
;
7129 ColorMapObject
*gif_color_map
;
7130 unsigned long pixel_colors
[256];
7132 int image_height
, image_width
;
7133 gif_memory_source memsrc
;
7134 Lisp_Object specified_bg
= image_spec_value (img
->spec
, QCbackground
, NULL
);
7135 Lisp_Object specified_file
= image_spec_value (img
->spec
, QCfile
, NULL
);
7136 Lisp_Object specified_data
= image_spec_value (img
->spec
, QCdata
, NULL
);
7137 unsigned long bgcolor
= 0;
7140 if (NILP (specified_data
))
7142 file
= x_find_image_file (specified_file
);
7143 if (!STRINGP (file
))
7145 image_error ("Cannot find image file `%s'", specified_file
, Qnil
);
7149 /* Open the GIF file. */
7150 gif
= fn_DGifOpenFileName (SSDATA (file
));
7153 image_error ("Cannot open `%s'", file
, Qnil
);
7159 if (!STRINGP (specified_data
))
7161 image_error ("Invalid image data `%s'", specified_data
, Qnil
);
7165 /* Read from memory! */
7166 current_gif_memory_src
= &memsrc
;
7167 memsrc
.bytes
= SDATA (specified_data
);
7168 memsrc
.len
= SBYTES (specified_data
);
7171 gif
= fn_DGifOpen (&memsrc
, gif_read_from_memory
);
7174 image_error ("Cannot open memory source `%s'", img
->spec
, Qnil
);
7179 /* Before reading entire contents, check the declared image size. */
7180 if (!check_image_size (f
, gif
->SWidth
, gif
->SHeight
))
7182 image_error ("Invalid image size (see `max-image-size')", Qnil
, Qnil
);
7183 fn_DGifCloseFile (gif
);
7187 /* Read entire contents. */
7188 rc
= fn_DGifSlurp (gif
);
7189 if (rc
== GIF_ERROR
|| gif
->ImageCount
<= 0)
7191 image_error ("Error reading `%s'", img
->spec
, Qnil
);
7192 fn_DGifCloseFile (gif
);
7196 /* Which sub-image are we to display? */
7198 Lisp_Object image_number
= image_spec_value (img
->spec
, QCindex
, NULL
);
7199 idx
= INTEGERP (image_number
) ? XFASTINT (image_number
) : 0;
7200 if (idx
< 0 || idx
>= gif
->ImageCount
)
7202 image_error ("Invalid image number `%s' in image `%s'",
7203 image_number
, img
->spec
);
7204 fn_DGifCloseFile (gif
);
7209 img
->corners
[TOP_CORNER
] = gif
->SavedImages
[idx
].ImageDesc
.Top
;
7210 img
->corners
[LEFT_CORNER
] = gif
->SavedImages
[idx
].ImageDesc
.Left
;
7211 image_height
= gif
->SavedImages
[idx
].ImageDesc
.Height
;
7212 img
->corners
[BOT_CORNER
] = img
->corners
[TOP_CORNER
] + image_height
;
7213 image_width
= gif
->SavedImages
[idx
].ImageDesc
.Width
;
7214 img
->corners
[RIGHT_CORNER
] = img
->corners
[LEFT_CORNER
] + image_width
;
7216 width
= img
->width
= max (gif
->SWidth
,
7217 max (gif
->Image
.Left
+ gif
->Image
.Width
,
7218 img
->corners
[RIGHT_CORNER
]));
7219 height
= img
->height
= max (gif
->SHeight
,
7220 max (gif
->Image
.Top
+ gif
->Image
.Height
,
7221 img
->corners
[BOT_CORNER
]));
7223 if (!check_image_size (f
, width
, height
))
7225 image_error ("Invalid image size (see `max-image-size')", Qnil
, Qnil
);
7226 fn_DGifCloseFile (gif
);
7230 /* Create the X image and pixmap. */
7231 if (!x_create_x_image_and_pixmap (f
, width
, height
, 0, &ximg
, &img
->pixmap
))
7233 fn_DGifCloseFile (gif
);
7237 /* Clear the part of the screen image not covered by the image.
7238 Full animated GIF support requires more here (see the gif89 spec,
7239 disposal methods). Let's simply assume that the part not covered
7240 by a sub-image is in the frame's background color. */
7241 for (y
= 0; y
< img
->corners
[TOP_CORNER
]; ++y
)
7242 for (x
= 0; x
< width
; ++x
)
7243 XPutPixel (ximg
, x
, y
, FRAME_BACKGROUND_PIXEL (f
));
7245 for (y
= img
->corners
[BOT_CORNER
]; y
< height
; ++y
)
7246 for (x
= 0; x
< width
; ++x
)
7247 XPutPixel (ximg
, x
, y
, FRAME_BACKGROUND_PIXEL (f
));
7249 for (y
= img
->corners
[TOP_CORNER
]; y
< img
->corners
[BOT_CORNER
]; ++y
)
7251 for (x
= 0; x
< img
->corners
[LEFT_CORNER
]; ++x
)
7252 XPutPixel (ximg
, x
, y
, FRAME_BACKGROUND_PIXEL (f
));
7253 for (x
= img
->corners
[RIGHT_CORNER
]; x
< width
; ++x
)
7254 XPutPixel (ximg
, x
, y
, FRAME_BACKGROUND_PIXEL (f
));
7257 /* Read the GIF image into the X image. */
7259 /* FIXME: With the current implementation, loading an animated gif
7260 is quadratic in the number of animation frames, since each frame
7261 is a separate struct image. We must provide a way for a single
7262 gif_load call to construct and save all animation frames. */
7264 init_color_table ();
7265 if (STRINGP (specified_bg
))
7266 bgcolor
= x_alloc_image_color (f
, img
, specified_bg
,
7267 FRAME_BACKGROUND_PIXEL (f
));
7268 for (j
= 0; j
<= idx
; ++j
)
7270 /* We use a local variable `raster' here because RasterBits is a
7271 char *, which invites problems with bytes >= 0x80. */
7272 struct SavedImage
*subimage
= gif
->SavedImages
+ j
;
7273 unsigned char *raster
= (unsigned char *) subimage
->RasterBits
;
7274 int transparency_color_index
= -1;
7277 /* Find the Graphic Control Extension block for this sub-image.
7278 Extract the disposal method and transparency color. */
7279 for (i
= 0; i
< subimage
->ExtensionBlockCount
; i
++)
7281 ExtensionBlock
*extblock
= subimage
->ExtensionBlocks
+ i
;
7283 if ((extblock
->Function
== GIF_LOCAL_DESCRIPTOR_EXTENSION
)
7284 && extblock
->ByteCount
== 4
7285 && extblock
->Bytes
[0] & 1)
7287 /* From gif89a spec: 1 = "keep in place", 2 = "restore
7288 to background". Treat any other value like 2. */
7289 disposal
= (extblock
->Bytes
[0] >> 2) & 7;
7290 transparency_color_index
= (unsigned char) extblock
->Bytes
[3];
7295 /* We can't "keep in place" the first subimage. */
7299 /* Allocate subimage colors. */
7300 memset (pixel_colors
, 0, sizeof pixel_colors
);
7301 gif_color_map
= subimage
->ImageDesc
.ColorMap
;
7303 gif_color_map
= gif
->SColorMap
;
7306 for (i
= 0; i
< gif_color_map
->ColorCount
; ++i
)
7308 if (transparency_color_index
== i
)
7309 pixel_colors
[i
] = STRINGP (specified_bg
)
7310 ? bgcolor
: FRAME_BACKGROUND_PIXEL (f
);
7313 int r
= gif_color_map
->Colors
[i
].Red
<< 8;
7314 int g
= gif_color_map
->Colors
[i
].Green
<< 8;
7315 int b
= gif_color_map
->Colors
[i
].Blue
<< 8;
7316 pixel_colors
[i
] = lookup_rgb_color (f
, r
, g
, b
);
7320 /* Apply the pixel values. */
7321 if (gif
->SavedImages
[j
].ImageDesc
.Interlace
)
7325 for (y
= 0, row
= interlace_start
[0], pass
= 0;
7327 y
++, row
+= interlace_increment
[pass
])
7329 if (row
>= image_height
)
7331 row
= interlace_start
[++pass
];
7332 while (row
>= image_height
)
7333 row
= interlace_start
[++pass
];
7336 for (x
= 0; x
< image_width
; x
++)
7338 int c
= raster
[y
* image_width
+ x
];
7339 if (transparency_color_index
!= c
|| disposal
!= 1)
7340 XPutPixel (ximg
, x
+ img
->corners
[LEFT_CORNER
],
7341 row
+ img
->corners
[TOP_CORNER
], pixel_colors
[c
]);
7347 for (y
= 0; y
< image_height
; ++y
)
7348 for (x
= 0; x
< image_width
; ++x
)
7350 int c
= raster
[y
* image_width
+ x
];
7351 if (transparency_color_index
!= c
|| disposal
!= 1)
7352 XPutPixel (ximg
, x
+ img
->corners
[LEFT_CORNER
],
7353 y
+ img
->corners
[TOP_CORNER
], pixel_colors
[c
]);
7358 #ifdef COLOR_TABLE_SUPPORT
7359 img
->colors
= colors_in_color_table (&img
->ncolors
);
7360 free_color_table ();
7361 #endif /* COLOR_TABLE_SUPPORT */
7363 /* Save GIF image extension data for `image-metadata'.
7364 Format is (count IMAGES extension-data (FUNCTION "BYTES" ...)). */
7365 img
->lisp_data
= Qnil
;
7366 if (gif
->SavedImages
[idx
].ExtensionBlockCount
> 0)
7368 unsigned int delay
= 0;
7369 ExtensionBlock
*ext
= gif
->SavedImages
[idx
].ExtensionBlocks
;
7370 for (i
= 0; i
< gif
->SavedImages
[idx
].ExtensionBlockCount
; i
++, ext
++)
7371 /* Append (... FUNCTION "BYTES") */
7374 = Fcons (make_number (ext
->Function
),
7375 Fcons (make_unibyte_string (ext
->Bytes
, ext
->ByteCount
),
7377 if (ext
->Function
== GIF_LOCAL_DESCRIPTOR_EXTENSION
7378 && ext
->ByteCount
== 4)
7380 delay
= ext
->Bytes
[2] << CHAR_BIT
;
7381 delay
|= ext
->Bytes
[1];
7384 img
->lisp_data
= Fcons (Qextension_data
,
7385 Fcons (img
->lisp_data
, Qnil
));
7389 Fcons (make_float (((double) delay
) * 0.01),
7393 if (gif
->ImageCount
> 1)
7394 img
->lisp_data
= Fcons (Qcount
,
7395 Fcons (make_number (gif
->ImageCount
),
7398 fn_DGifCloseFile (gif
);
7400 /* Maybe fill in the background field while we have ximg handy. */
7401 if (NILP (image_spec_value (img
->spec
, QCbackground
, NULL
)))
7402 /* Casting avoids a GCC warning. */
7403 IMAGE_BACKGROUND (img
, f
, (XImagePtr_or_DC
)ximg
);
7405 /* Put the image into the pixmap, then free the X image and its buffer. */
7406 x_put_x_image (f
, ximg
, img
->pixmap
, width
, height
);
7407 x_destroy_x_image (ximg
);
7412 #else /* !HAVE_GIF */
7416 gif_load (struct frame
*f
, struct image
*img
)
7418 return ns_load_image (f
, img
,
7419 image_spec_value (img
->spec
, QCfile
, NULL
),
7420 image_spec_value (img
->spec
, QCdata
, NULL
));
7422 #endif /* HAVE_NS */
7424 #endif /* HAVE_GIF */
7427 /***********************************************************************
7429 ***********************************************************************/
7430 #if defined (HAVE_IMAGEMAGICK)
7432 static Lisp_Object Qimagemagick
;
7434 static int imagemagick_image_p (Lisp_Object
);
7435 static int imagemagick_load (struct frame
*, struct image
*);
7436 static void imagemagick_clear_image (struct frame
*, struct image
*);
7438 /* Indices of image specification fields in imagemagick_format. */
7440 enum imagemagick_keyword_index
7448 IMAGEMAGICK_ALGORITHM
,
7449 IMAGEMAGICK_HEURISTIC_MASK
,
7451 IMAGEMAGICK_BACKGROUND
,
7454 IMAGEMAGICK_ROTATION
,
7459 /* Vector of image_keyword structures describing the format
7460 of valid user-defined image specifications. */
7462 static struct image_keyword imagemagick_format
[IMAGEMAGICK_LAST
] =
7464 {":type", IMAGE_SYMBOL_VALUE
, 1},
7465 {":data", IMAGE_STRING_VALUE
, 0},
7466 {":file", IMAGE_STRING_VALUE
, 0},
7467 {":ascent", IMAGE_ASCENT_VALUE
, 0},
7468 {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR
, 0},
7469 {":relief", IMAGE_INTEGER_VALUE
, 0},
7470 {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
7471 {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
7472 {":mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
7473 {":background", IMAGE_STRING_OR_NIL_VALUE
, 0},
7474 {":height", IMAGE_INTEGER_VALUE
, 0},
7475 {":width", IMAGE_INTEGER_VALUE
, 0},
7476 {":rotation", IMAGE_NUMBER_VALUE
, 0},
7477 {":crop", IMAGE_DONT_CHECK_VALUE_TYPE
, 0}
7480 /* Structure describing the image type for any image handled via
7483 static struct image_type imagemagick_type
=
7486 imagemagick_image_p
,
7488 imagemagick_clear_image
,
7492 /* Free X resources of imagemagick image IMG which is used on frame F. */
7495 imagemagick_clear_image (struct frame
*f
,
7498 x_clear_image (f
, img
);
7501 /* Return non-zero if OBJECT is a valid IMAGEMAGICK image specification. Do
7502 this by calling parse_image_spec and supplying the keywords that
7503 identify the IMAGEMAGICK format. */
7506 imagemagick_image_p (Lisp_Object object
)
7508 struct image_keyword fmt
[IMAGEMAGICK_LAST
];
7509 memcpy (fmt
, imagemagick_format
, sizeof fmt
);
7511 if (!parse_image_spec (object
, fmt
, IMAGEMAGICK_LAST
, Qimagemagick
))
7514 /* Must specify either the :data or :file keyword. */
7515 return fmt
[IMAGEMAGICK_FILE
].count
+ fmt
[IMAGEMAGICK_DATA
].count
== 1;
7518 /* The GIF library also defines DrawRectangle, but its never used in Emacs.
7519 Therefore rename the function so it doesnt collide with ImageMagick. */
7520 #define DrawRectangle DrawRectangleGif
7521 #include <wand/MagickWand.h>
7523 /* ImageMagick 6.5.3 through 6.6.5 hid PixelGetMagickColor for some reason.
7524 Emacs seems to work fine with the hidden version, so unhide it. */
7525 #include <magick/version.h>
7526 #if 0x653 <= MagickLibVersion && MagickLibVersion <= 0x665
7527 extern WandExport
void PixelGetMagickColor (const PixelWand
*,
7528 MagickPixelPacket
*);
7531 /* Helper function for imagemagick_load, which does the actual loading
7532 given contents and size, apart from frame and image structures,
7533 passed from imagemagick_load. Uses librimagemagick to do most of
7534 the image processing.
7536 F is a pointer to the Emacs frame; IMG to the image structure to
7537 prepare; CONTENTS is the string containing the IMAGEMAGICK data to
7538 be parsed; SIZE is the number of bytes of data; and FILENAME is
7539 either the file name or the image data.
7541 Return non-zero if successful. */
7544 imagemagick_load_image (struct frame
*f
, struct image
*img
,
7545 unsigned char *contents
, unsigned int size
,
7551 MagickBooleanType status
;
7557 MagickWand
*image_wand
;
7558 MagickWand
*ping_wand
;
7559 PixelIterator
*iterator
;
7561 MagickPixelPacket pixel
;
7566 int desired_width
, desired_height
;
7568 int imagemagick_rendermethod
;
7570 ImageInfo
*image_info
;
7571 ExceptionInfo
*exception
;
7575 /* Handle image index for image types who can contain more than one image.
7576 Interface :index is same as for GIF. First we "ping" the image to see how
7577 many sub-images it contains. Pinging is faster than loading the image to
7578 find out things about it. */
7580 /* Initialize the imagemagick environment. */
7581 MagickWandGenesis ();
7582 image
= image_spec_value (img
->spec
, QCindex
, NULL
);
7583 ino
= INTEGERP (image
) ? XFASTINT (image
) : 0;
7584 ping_wand
= NewMagickWand ();
7585 MagickSetResolution (ping_wand
, 2, 2);
7586 if (filename
!= NULL
)
7588 status
= MagickPingImage (ping_wand
, filename
);
7592 status
= MagickPingImageBlob (ping_wand
, contents
, size
);
7595 if (ino
>= MagickGetNumberImages (ping_wand
))
7597 image_error ("Invalid image number `%s' in image `%s'",
7599 DestroyMagickWand (ping_wand
);
7603 if (MagickGetNumberImages(ping_wand
) > 1)
7606 Fcons (make_number (MagickGetNumberImages (ping_wand
)),
7609 DestroyMagickWand (ping_wand
);
7611 /* Now we know how many images are inside the file. If it's not a
7612 bundle, the number is one. */
7614 if (filename
!= NULL
)
7616 image_info
= CloneImageInfo ((ImageInfo
*) NULL
);
7617 (void) strcpy (image_info
->filename
, filename
);
7618 image_info
->number_scenes
= 1;
7619 image_info
->scene
= ino
;
7620 exception
= AcquireExceptionInfo ();
7622 im_image
= ReadImage (image_info
, exception
);
7623 DestroyExceptionInfo (exception
);
7625 if (im_image
== NULL
)
7626 goto imagemagick_no_wand
;
7627 image_wand
= NewMagickWandFromImage (im_image
);
7628 DestroyImage(im_image
);
7632 image_wand
= NewMagickWand ();
7633 if (MagickReadImageBlob (image_wand
, contents
, size
) == MagickFalse
)
7634 goto imagemagick_error
;
7637 /* If width and/or height is set in the display spec assume we want
7638 to scale to those values. If either h or w is unspecified, the
7639 unspecified should be calculated from the specified to preserve
7642 value
= image_spec_value (img
->spec
, QCwidth
, NULL
);
7643 desired_width
= (INTEGERP (value
) ? XFASTINT (value
) : -1);
7644 value
= image_spec_value (img
->spec
, QCheight
, NULL
);
7645 desired_height
= (INTEGERP (value
) ? XFASTINT (value
) : -1);
7647 height
= MagickGetImageHeight (image_wand
);
7648 width
= MagickGetImageWidth (image_wand
);
7650 if (desired_width
!= -1 && desired_height
== -1)
7651 /* w known, calculate h. */
7652 desired_height
= (double) desired_width
/ width
* height
;
7653 if (desired_width
== -1 && desired_height
!= -1)
7654 /* h known, calculate w. */
7655 desired_width
= (double) desired_height
/ height
* width
;
7656 if (desired_width
!= -1 && desired_height
!= -1)
7658 status
= MagickScaleImage (image_wand
, desired_width
, desired_height
);
7659 if (status
== MagickFalse
)
7661 image_error ("Imagemagick scale failed", Qnil
, Qnil
);
7662 goto imagemagick_error
;
7666 /* crop behaves similar to image slicing in Emacs but is more memory
7668 crop
= image_spec_value (img
->spec
, QCcrop
, NULL
);
7670 if (CONSP (crop
) && INTEGERP (XCAR (crop
)))
7672 /* After some testing, it seems MagickCropImage is the fastest crop
7673 function in ImageMagick. This crop function seems to do less copying
7674 than the alternatives, but it still reads the entire image into memory
7675 before croping, which is aparently difficult to avoid when using
7678 w
= XFASTINT (XCAR (crop
));
7680 if (CONSP (crop
) && INTEGERP (XCAR (crop
)))
7682 h
= XFASTINT (XCAR (crop
));
7684 if (CONSP (crop
) && INTEGERP (XCAR (crop
)))
7686 x
= XFASTINT (XCAR (crop
));
7688 if (CONSP (crop
) && INTEGERP (XCAR (crop
)))
7690 y
= XFASTINT (XCAR (crop
));
7691 MagickCropImage (image_wand
, w
, h
, x
, y
);
7697 /* Furthermore :rotation. we need background color and angle for
7700 TODO background handling for rotation specified_bg =
7701 image_spec_value (img->spec, QCbackground, NULL); if (!STRINGP
7703 value
= image_spec_value (img
->spec
, QCrotation
, NULL
);
7706 PixelWand
* background
= NewPixelWand ();
7707 PixelSetColor (background
, "#ffffff");/*TODO remove hardcode*/
7709 rotation
= extract_float (value
);
7711 status
= MagickRotateImage (image_wand
, background
, rotation
);
7712 DestroyPixelWand (background
);
7713 if (status
== MagickFalse
)
7715 image_error ("Imagemagick image rotate failed", Qnil
, Qnil
);
7716 goto imagemagick_error
;
7720 /* Finally we are done manipulating the image. Figure out the
7721 resulting width/height and transfer ownerwship to Emacs. */
7722 height
= MagickGetImageHeight (image_wand
);
7723 width
= MagickGetImageWidth (image_wand
);
7725 if (! (width
<= INT_MAX
&& height
<= INT_MAX
7726 && check_image_size (f
, width
, height
)))
7728 image_error ("Invalid image size (see `max-image-size')", Qnil
, Qnil
);
7729 goto imagemagick_error
;
7732 /* We can now get a valid pixel buffer from the imagemagick file, if all
7735 init_color_table ();
7736 imagemagick_rendermethod
= (INTEGERP (Vimagemagick_render_type
)
7737 ? XFASTINT (Vimagemagick_render_type
) : 0);
7738 if (imagemagick_rendermethod
== 0)
7740 /* Try to create a x pixmap to hold the imagemagick pixmap. */
7741 if (!x_create_x_image_and_pixmap (f
, width
, height
, 0,
7742 &ximg
, &img
->pixmap
))
7744 #ifdef COLOR_TABLE_SUPPORT
7745 free_color_table ();
7747 image_error("Imagemagick X bitmap allocation failure", Qnil
, Qnil
);
7748 goto imagemagick_error
;
7751 /* Copy imagegmagick image to x with primitive yet robust pixel
7752 pusher loop. This has been tested a lot with many different
7755 /* Copy pixels from the imagemagick image structure to the x image map. */
7756 iterator
= NewPixelIterator (image_wand
);
7757 if (iterator
== (PixelIterator
*) NULL
)
7759 #ifdef COLOR_TABLE_SUPPORT
7760 free_color_table ();
7762 x_destroy_x_image (ximg
);
7763 image_error ("Imagemagick pixel iterator creation failed",
7765 goto imagemagick_error
;
7768 for (y
= 0; y
< (long) MagickGetImageHeight (image_wand
); y
++)
7770 pixels
= PixelGetNextIteratorRow (iterator
, &width
);
7771 if (pixels
== (PixelWand
**) NULL
)
7773 for (x
= 0; x
< (long) width
; x
++)
7775 PixelGetMagickColor (pixels
[x
], &pixel
);
7776 XPutPixel (ximg
, x
, y
,
7777 lookup_rgb_color (f
,
7783 DestroyPixelIterator (iterator
);
7786 if (imagemagick_rendermethod
== 1)
7788 /* Magicexportimage is normaly faster than pixelpushing. This
7789 method is also well tested. Some aspects of this method are
7790 ad-hoc and needs to be more researched. */
7791 int imagedepth
= 24;/*MagickGetImageDepth(image_wand);*/
7792 const char *exportdepth
= imagedepth
<= 8 ? "I" : "BGRP";/*"RGBP";*/
7793 /* Try to create a x pixmap to hold the imagemagick pixmap. */
7794 if (!x_create_x_image_and_pixmap (f
, width
, height
, imagedepth
,
7795 &ximg
, &img
->pixmap
))
7797 #ifdef COLOR_TABLE_SUPPORT
7798 free_color_table ();
7800 image_error("Imagemagick X bitmap allocation failure", Qnil
, Qnil
);
7801 goto imagemagick_error
;
7805 /* Oddly, the below code doesnt seem to work:*/
7806 /* switch(ximg->bitmap_unit){ */
7808 /* pixelwidth=CharPixel; */
7811 /* pixelwidth=ShortPixel; */
7814 /* pixelwidth=LongPixel; */
7818 Here im just guessing the format of the bitmap.
7819 happens to work fine for:
7822 seems about 3 times as fast as pixel pushing(not carefully measured)
7824 pixelwidth
= CharPixel
;/*??? TODO figure out*/
7825 #ifdef HAVE_MAGICKEXPORTIMAGEPIXELS
7826 MagickExportImagePixels (image_wand
,
7831 /*&(img->pixmap));*/
7834 image_error ("You dont have MagickExportImagePixels, upgrade ImageMagick!",
7840 #ifdef COLOR_TABLE_SUPPORT
7841 /* Remember colors allocated for this image. */
7842 img
->colors
= colors_in_color_table (&img
->ncolors
);
7843 free_color_table ();
7844 #endif /* COLOR_TABLE_SUPPORT */
7848 img
->height
= height
;
7850 /* Put the image into the pixmap, then free the X image and its
7852 x_put_x_image (f
, ximg
, img
->pixmap
, width
, height
);
7853 x_destroy_x_image (ximg
);
7856 /* Final cleanup. image_wand should be the only resource left. */
7857 DestroyMagickWand (image_wand
);
7858 /* `MagickWandTerminus' terminates the imagemagick environment. */
7859 MagickWandTerminus ();
7864 DestroyMagickWand (image_wand
);
7865 imagemagick_no_wand
:
7866 MagickWandTerminus ();
7867 /* TODO more cleanup. */
7868 image_error ("Error parsing IMAGEMAGICK image `%s'", img
->spec
, Qnil
);
7873 /* Load IMAGEMAGICK image IMG for use on frame F. Value is non-zero if
7874 successful. this function will go into the imagemagick_type structure, and
7875 the prototype thus needs to be compatible with that structure. */
7878 imagemagick_load (struct frame
*f
, struct image
*img
)
7881 Lisp_Object file_name
;
7883 /* If IMG->spec specifies a file name, create a non-file spec from it. */
7884 file_name
= image_spec_value (img
->spec
, QCfile
, NULL
);
7885 if (STRINGP (file_name
))
7889 file
= x_find_image_file (file_name
);
7890 if (!STRINGP (file
))
7892 image_error ("Cannot find image file `%s'", file_name
, Qnil
);
7895 success_p
= imagemagick_load_image (f
, img
, 0, 0, SSDATA (file
));
7897 /* Else its not a file, its a lisp object. Load the image from a
7898 lisp object rather than a file. */
7903 data
= image_spec_value (img
->spec
, QCdata
, NULL
);
7904 if (!STRINGP (data
))
7906 image_error ("Invalid image data `%s'", data
, Qnil
);
7909 success_p
= imagemagick_load_image (f
, img
, SDATA (data
),
7910 SBYTES (data
), NULL
);
7916 DEFUN ("imagemagick-types", Fimagemagick_types
, Simagemagick_types
, 0, 0, 0,
7917 doc
: /* Return a list of image types supported by ImageMagick.
7918 Each entry in this list is a symbol named after an ImageMagick format
7919 tag. See the ImageMagick manual for a list of ImageMagick formats and
7920 their descriptions (http://www.imagemagick.org/script/formats.php).
7922 Note that ImageMagick recognizes many file-types that Emacs does not
7923 recognize as images, such as C. See `imagemagick-types-inhibit'. */)
7926 Lisp_Object typelist
= Qnil
;
7929 char **imtypes
= GetMagickList ("*", &numf
, &ex
);
7931 Lisp_Object Qimagemagicktype
;
7932 for (i
= 0; i
< numf
; i
++)
7934 Qimagemagicktype
= intern (imtypes
[i
]);
7935 typelist
= Fcons (Qimagemagicktype
, typelist
);
7940 #endif /* defined (HAVE_IMAGEMAGICK) */
7944 /***********************************************************************
7946 ***********************************************************************/
7948 #if defined (HAVE_RSVG)
7950 /* Function prototypes. */
7952 static int svg_image_p (Lisp_Object object
);
7953 static int svg_load (struct frame
*f
, struct image
*img
);
7955 static int svg_load_image (struct frame
*, struct image
*,
7956 unsigned char *, ptrdiff_t);
7958 /* The symbol `svg' identifying images of this type. */
7960 static Lisp_Object Qsvg
;
7962 /* Indices of image specification fields in svg_format, below. */
7964 enum svg_keyword_index
7979 /* Vector of image_keyword structures describing the format
7980 of valid user-defined image specifications. */
7982 static const struct image_keyword svg_format
[SVG_LAST
] =
7984 {":type", IMAGE_SYMBOL_VALUE
, 1},
7985 {":data", IMAGE_STRING_VALUE
, 0},
7986 {":file", IMAGE_STRING_VALUE
, 0},
7987 {":ascent", IMAGE_ASCENT_VALUE
, 0},
7988 {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR
, 0},
7989 {":relief", IMAGE_INTEGER_VALUE
, 0},
7990 {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
7991 {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
7992 {":mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
7993 {":background", IMAGE_STRING_OR_NIL_VALUE
, 0}
7996 /* Structure describing the image type `svg'. Its the same type of
7997 structure defined for all image formats, handled by emacs image
7998 functions. See struct image_type in dispextern.h. */
8000 static struct image_type svg_type
=
8002 /* An identifier showing that this is an image structure for the SVG format. */
8004 /* Handle to a function that can be used to identify a SVG file. */
8006 /* Handle to function used to load a SVG file. */
8008 /* Handle to function to free sresources for SVG. */
8010 /* An internal field to link to the next image type in a list of
8011 image types, will be filled in when registering the format. */
8016 /* Return non-zero if OBJECT is a valid SVG image specification. Do
8017 this by calling parse_image_spec and supplying the keywords that
8018 identify the SVG format. */
8021 svg_image_p (Lisp_Object object
)
8023 struct image_keyword fmt
[SVG_LAST
];
8024 memcpy (fmt
, svg_format
, sizeof fmt
);
8026 if (!parse_image_spec (object
, fmt
, SVG_LAST
, Qsvg
))
8029 /* Must specify either the :data or :file keyword. */
8030 return fmt
[SVG_FILE
].count
+ fmt
[SVG_DATA
].count
== 1;
8033 #include <librsvg/rsvg.h>
8037 /* SVG library functions. */
8038 DEF_IMGLIB_FN (RsvgHandle
*, rsvg_handle_new
);
8039 DEF_IMGLIB_FN (void, rsvg_handle_get_dimensions
);
8040 DEF_IMGLIB_FN (gboolean
, rsvg_handle_write
);
8041 DEF_IMGLIB_FN (gboolean
, rsvg_handle_close
);
8042 DEF_IMGLIB_FN (GdkPixbuf
*, rsvg_handle_get_pixbuf
);
8044 DEF_IMGLIB_FN (int, gdk_pixbuf_get_width
);
8045 DEF_IMGLIB_FN (int, gdk_pixbuf_get_height
);
8046 DEF_IMGLIB_FN (guchar
*, gdk_pixbuf_get_pixels
);
8047 DEF_IMGLIB_FN (int, gdk_pixbuf_get_rowstride
);
8048 DEF_IMGLIB_FN (GdkColorspace
, gdk_pixbuf_get_colorspace
);
8049 DEF_IMGLIB_FN (int, gdk_pixbuf_get_n_channels
);
8050 DEF_IMGLIB_FN (gboolean
, gdk_pixbuf_get_has_alpha
);
8051 DEF_IMGLIB_FN (int, gdk_pixbuf_get_bits_per_sample
);
8053 DEF_IMGLIB_FN (void, g_type_init
);
8054 DEF_IMGLIB_FN (void, g_object_unref
);
8055 DEF_IMGLIB_FN (void, g_error_free
);
8057 Lisp_Object Qgdk_pixbuf
, Qglib
, Qgobject
;
8060 init_svg_functions (Lisp_Object libraries
)
8062 HMODULE library
, gdklib
, glib
, gobject
;
8064 if (!(glib
= w32_delayed_load (libraries
, Qglib
))
8065 || !(gobject
= w32_delayed_load (libraries
, Qgobject
))
8066 || !(gdklib
= w32_delayed_load (libraries
, Qgdk_pixbuf
))
8067 || !(library
= w32_delayed_load (libraries
, Qsvg
)))
8070 LOAD_IMGLIB_FN (library
, rsvg_handle_new
);
8071 LOAD_IMGLIB_FN (library
, rsvg_handle_get_dimensions
);
8072 LOAD_IMGLIB_FN (library
, rsvg_handle_write
);
8073 LOAD_IMGLIB_FN (library
, rsvg_handle_close
);
8074 LOAD_IMGLIB_FN (library
, rsvg_handle_get_pixbuf
);
8076 LOAD_IMGLIB_FN (gdklib
, gdk_pixbuf_get_width
);
8077 LOAD_IMGLIB_FN (gdklib
, gdk_pixbuf_get_height
);
8078 LOAD_IMGLIB_FN (gdklib
, gdk_pixbuf_get_pixels
);
8079 LOAD_IMGLIB_FN (gdklib
, gdk_pixbuf_get_rowstride
);
8080 LOAD_IMGLIB_FN (gdklib
, gdk_pixbuf_get_colorspace
);
8081 LOAD_IMGLIB_FN (gdklib
, gdk_pixbuf_get_n_channels
);
8082 LOAD_IMGLIB_FN (gdklib
, gdk_pixbuf_get_has_alpha
);
8083 LOAD_IMGLIB_FN (gdklib
, gdk_pixbuf_get_bits_per_sample
);
8085 LOAD_IMGLIB_FN (gobject
, g_type_init
);
8086 LOAD_IMGLIB_FN (gobject
, g_object_unref
);
8087 LOAD_IMGLIB_FN (glib
, g_error_free
);
8093 /* The following aliases for library functions allow dynamic loading
8094 to be used on some platforms. */
8095 #define fn_rsvg_handle_new rsvg_handle_new
8096 #define fn_rsvg_handle_get_dimensions rsvg_handle_get_dimensions
8097 #define fn_rsvg_handle_write rsvg_handle_write
8098 #define fn_rsvg_handle_close rsvg_handle_close
8099 #define fn_rsvg_handle_get_pixbuf rsvg_handle_get_pixbuf
8101 #define fn_gdk_pixbuf_get_width gdk_pixbuf_get_width
8102 #define fn_gdk_pixbuf_get_height gdk_pixbuf_get_height
8103 #define fn_gdk_pixbuf_get_pixels gdk_pixbuf_get_pixels
8104 #define fn_gdk_pixbuf_get_rowstride gdk_pixbuf_get_rowstride
8105 #define fn_gdk_pixbuf_get_colorspace gdk_pixbuf_get_colorspace
8106 #define fn_gdk_pixbuf_get_n_channels gdk_pixbuf_get_n_channels
8107 #define fn_gdk_pixbuf_get_has_alpha gdk_pixbuf_get_has_alpha
8108 #define fn_gdk_pixbuf_get_bits_per_sample gdk_pixbuf_get_bits_per_sample
8110 #define fn_g_type_init g_type_init
8111 #define fn_g_object_unref g_object_unref
8112 #define fn_g_error_free g_error_free
8113 #endif /* !HAVE_NTGUI */
8115 /* Load SVG image IMG for use on frame F. Value is non-zero if
8116 successful. this function will go into the svg_type structure, and
8117 the prototype thus needs to be compatible with that structure. */
8120 svg_load (struct frame
*f
, struct image
*img
)
8123 Lisp_Object file_name
;
8125 /* If IMG->spec specifies a file name, create a non-file spec from it. */
8126 file_name
= image_spec_value (img
->spec
, QCfile
, NULL
);
8127 if (STRINGP (file_name
))
8130 unsigned char *contents
;
8133 file
= x_find_image_file (file_name
);
8134 if (!STRINGP (file
))
8136 image_error ("Cannot find image file `%s'", file_name
, Qnil
);
8140 /* Read the entire file into memory. */
8141 contents
= slurp_file (SSDATA (file
), &size
);
8142 if (contents
== NULL
)
8144 image_error ("Error loading SVG image `%s'", img
->spec
, Qnil
);
8147 /* If the file was slurped into memory properly, parse it. */
8148 success_p
= svg_load_image (f
, img
, contents
, size
);
8151 /* Else its not a file, its a lisp object. Load the image from a
8152 lisp object rather than a file. */
8157 data
= image_spec_value (img
->spec
, QCdata
, NULL
);
8158 if (!STRINGP (data
))
8160 image_error ("Invalid image data `%s'", data
, Qnil
);
8163 success_p
= svg_load_image (f
, img
, SDATA (data
), SBYTES (data
));
8169 /* svg_load_image is a helper function for svg_load, which does the
8170 actual loading given contents and size, apart from frame and image
8171 structures, passed from svg_load.
8173 Uses librsvg to do most of the image processing.
8175 Returns non-zero when successful. */
8177 svg_load_image (struct frame
*f
, /* Pointer to emacs frame structure. */
8178 struct image
*img
, /* Pointer to emacs image structure. */
8179 unsigned char *contents
, /* String containing the SVG XML data to be parsed. */
8180 ptrdiff_t size
) /* Size of data in bytes. */
8182 RsvgHandle
*rsvg_handle
;
8183 RsvgDimensionData dimension_data
;
8188 const guint8
*pixels
;
8191 Lisp_Object specified_bg
;
8196 /* g_type_init is a glib function that must be called prior to using
8197 gnome type library functions. */
8199 /* Make a handle to a new rsvg object. */
8200 rsvg_handle
= fn_rsvg_handle_new ();
8202 /* Parse the contents argument and fill in the rsvg_handle. */
8203 fn_rsvg_handle_write (rsvg_handle
, contents
, size
, &err
);
8204 if (err
) goto rsvg_error
;
8206 /* The parsing is complete, rsvg_handle is ready to used, close it
8207 for further writes. */
8208 fn_rsvg_handle_close (rsvg_handle
, &err
);
8209 if (err
) goto rsvg_error
;
8211 fn_rsvg_handle_get_dimensions (rsvg_handle
, &dimension_data
);
8212 if (! check_image_size (f
, dimension_data
.width
, dimension_data
.height
))
8214 image_error ("Invalid image size (see `max-image-size')", Qnil
, Qnil
);
8218 /* We can now get a valid pixel buffer from the svg file, if all
8220 pixbuf
= fn_rsvg_handle_get_pixbuf (rsvg_handle
);
8221 if (!pixbuf
) goto rsvg_error
;
8222 fn_g_object_unref (rsvg_handle
);
8224 /* Extract some meta data from the svg handle. */
8225 width
= fn_gdk_pixbuf_get_width (pixbuf
);
8226 height
= fn_gdk_pixbuf_get_height (pixbuf
);
8227 pixels
= fn_gdk_pixbuf_get_pixels (pixbuf
);
8228 rowstride
= fn_gdk_pixbuf_get_rowstride (pixbuf
);
8230 /* Validate the svg meta data. */
8231 eassert (fn_gdk_pixbuf_get_colorspace (pixbuf
) == GDK_COLORSPACE_RGB
);
8232 eassert (fn_gdk_pixbuf_get_n_channels (pixbuf
) == 4);
8233 eassert (fn_gdk_pixbuf_get_has_alpha (pixbuf
));
8234 eassert (fn_gdk_pixbuf_get_bits_per_sample (pixbuf
) == 8);
8236 /* Try to create a x pixmap to hold the svg pixmap. */
8237 if (!x_create_x_image_and_pixmap (f
, width
, height
, 0, &ximg
, &img
->pixmap
))
8239 fn_g_object_unref (pixbuf
);
8243 init_color_table ();
8245 /* Handle alpha channel by combining the image with a background
8247 specified_bg
= image_spec_value (img
->spec
, QCbackground
, NULL
);
8248 if (!STRINGP (specified_bg
)
8249 || !x_defined_color (f
, SSDATA (specified_bg
), &background
, 0))
8252 background
.pixel
= FRAME_BACKGROUND_PIXEL (f
);
8253 x_query_color (f
, &background
);
8255 ns_query_color (FRAME_BACKGROUND_COLOR (f
), &background
, 1);
8259 /* SVG pixmaps specify transparency in the last byte, so right
8260 shift 8 bits to get rid of it, since emacs doesn't support
8262 background
.red
>>= 8;
8263 background
.green
>>= 8;
8264 background
.blue
>>= 8;
8266 /* This loop handles opacity values, since Emacs assumes
8267 non-transparent images. Each pixel must be "flattened" by
8268 calculating the resulting color, given the transparency of the
8269 pixel, and the image background color. */
8270 for (y
= 0; y
< height
; ++y
)
8272 for (x
= 0; x
< width
; ++x
)
8282 opacity
= *pixels
++;
8284 red
= ((red
* opacity
)
8285 + (background
.red
* ((1 << 8) - opacity
)));
8286 green
= ((green
* opacity
)
8287 + (background
.green
* ((1 << 8) - opacity
)));
8288 blue
= ((blue
* opacity
)
8289 + (background
.blue
* ((1 << 8) - opacity
)));
8291 XPutPixel (ximg
, x
, y
, lookup_rgb_color (f
, red
, green
, blue
));
8294 pixels
+= rowstride
- 4 * width
;
8297 #ifdef COLOR_TABLE_SUPPORT
8298 /* Remember colors allocated for this image. */
8299 img
->colors
= colors_in_color_table (&img
->ncolors
);
8300 free_color_table ();
8301 #endif /* COLOR_TABLE_SUPPORT */
8303 fn_g_object_unref (pixbuf
);
8306 img
->height
= height
;
8308 /* Maybe fill in the background field while we have ximg handy.
8309 Casting avoids a GCC warning. */
8310 IMAGE_BACKGROUND (img
, f
, (XImagePtr_or_DC
)ximg
);
8312 /* Put the image into the pixmap, then free the X image and its
8314 x_put_x_image (f
, ximg
, img
->pixmap
, width
, height
);
8315 x_destroy_x_image (ximg
);
8320 fn_g_object_unref (rsvg_handle
);
8321 /* FIXME: Use error->message so the user knows what is the actual
8322 problem with the image. */
8323 image_error ("Error parsing SVG image `%s'", img
->spec
, Qnil
);
8324 fn_g_error_free (err
);
8328 #endif /* defined (HAVE_RSVG) */
8333 /***********************************************************************
8335 ***********************************************************************/
8337 #ifdef HAVE_X_WINDOWS
8338 #define HAVE_GHOSTSCRIPT 1
8339 #endif /* HAVE_X_WINDOWS */
8341 #ifdef HAVE_GHOSTSCRIPT
8343 static int gs_image_p (Lisp_Object object
);
8344 static int gs_load (struct frame
*f
, struct image
*img
);
8345 static void gs_clear_image (struct frame
*f
, struct image
*img
);
8347 /* Keyword symbols. */
8349 static Lisp_Object QCloader
, QCbounding_box
, QCpt_width
, QCpt_height
;
8351 /* Indices of image specification fields in gs_format, below. */
8353 enum gs_keyword_index
8371 /* Vector of image_keyword structures describing the format
8372 of valid user-defined image specifications. */
8374 static const struct image_keyword gs_format
[GS_LAST
] =
8376 {":type", IMAGE_SYMBOL_VALUE
, 1},
8377 {":pt-width", IMAGE_POSITIVE_INTEGER_VALUE
, 1},
8378 {":pt-height", IMAGE_POSITIVE_INTEGER_VALUE
, 1},
8379 {":file", IMAGE_STRING_VALUE
, 1},
8380 {":loader", IMAGE_FUNCTION_VALUE
, 0},
8381 {":bounding-box", IMAGE_DONT_CHECK_VALUE_TYPE
, 1},
8382 {":ascent", IMAGE_ASCENT_VALUE
, 0},
8383 {":margin", IMAGE_POSITIVE_INTEGER_VALUE_OR_PAIR
, 0},
8384 {":relief", IMAGE_INTEGER_VALUE
, 0},
8385 {":conversion", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
8386 {":heuristic-mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
8387 {":mask", IMAGE_DONT_CHECK_VALUE_TYPE
, 0},
8388 {":background", IMAGE_STRING_OR_NIL_VALUE
, 0}
8391 /* Structure describing the image type `ghostscript'. */
8393 static struct image_type gs_type
=
8403 /* Free X resources of Ghostscript image IMG which is used on frame F. */
8406 gs_clear_image (struct frame
*f
, struct image
*img
)
8408 x_clear_image (f
, img
);
8412 /* Return non-zero if OBJECT is a valid Ghostscript image
8416 gs_image_p (Lisp_Object object
)
8418 struct image_keyword fmt
[GS_LAST
];
8422 memcpy (fmt
, gs_format
, sizeof fmt
);
8424 if (!parse_image_spec (object
, fmt
, GS_LAST
, Qpostscript
))
8427 /* Bounding box must be a list or vector containing 4 integers. */
8428 tem
= fmt
[GS_BOUNDING_BOX
].value
;
8431 for (i
= 0; i
< 4; ++i
, tem
= XCDR (tem
))
8432 if (!CONSP (tem
) || !INTEGERP (XCAR (tem
)))
8437 else if (VECTORP (tem
))
8439 if (ASIZE (tem
) != 4)
8441 for (i
= 0; i
< 4; ++i
)
8442 if (!INTEGERP (XVECTOR (tem
)->contents
[i
]))
8452 /* Load Ghostscript image IMG for use on frame F. Value is non-zero
8456 gs_load (struct frame
*f
, struct image
*img
)
8459 Lisp_Object window_and_pixmap_id
= Qnil
, loader
, pt_height
, pt_width
;
8461 double in_width
, in_height
;
8462 Lisp_Object pixel_colors
= Qnil
;
8464 /* Compute pixel size of pixmap needed from the given size in the
8465 image specification. Sizes in the specification are in pt. 1 pt
8466 = 1/72 in, xdpi and ydpi are stored in the frame's X display
8468 pt_width
= image_spec_value (img
->spec
, QCpt_width
, NULL
);
8469 in_width
= INTEGERP (pt_width
) ? XFASTINT (pt_width
) / 72.0 : 0;
8470 img
->width
= in_width
* FRAME_X_DISPLAY_INFO (f
)->resx
;
8471 pt_height
= image_spec_value (img
->spec
, QCpt_height
, NULL
);
8472 in_height
= INTEGERP (pt_height
) ? XFASTINT (pt_height
) / 72.0 : 0;
8473 img
->height
= in_height
* FRAME_X_DISPLAY_INFO (f
)->resy
;
8475 if (!check_image_size (f
, img
->width
, img
->height
))
8477 image_error ("Invalid image size (see `max-image-size')", Qnil
, Qnil
);
8481 /* Create the pixmap. */
8482 xassert (img
->pixmap
== NO_PIXMAP
);
8484 if (x_check_image_size (0, img
->width
, img
->height
))
8486 /* Only W32 version did BLOCK_INPUT here. ++kfs */
8488 img
->pixmap
= XCreatePixmap (FRAME_X_DISPLAY (f
), FRAME_X_WINDOW (f
),
8489 img
->width
, img
->height
,
8490 DefaultDepthOfScreen (FRAME_X_SCREEN (f
)));
8496 image_error ("Unable to create pixmap for `%s'", img
->spec
, Qnil
);
8500 /* Call the loader to fill the pixmap. It returns a process object
8501 if successful. We do not record_unwind_protect here because
8502 other places in redisplay like calling window scroll functions
8503 don't either. Let the Lisp loader use `unwind-protect' instead. */
8504 sprintf (buffer
, "%lu %lu",
8505 (unsigned long) FRAME_X_WINDOW (f
),
8506 (unsigned long) img
->pixmap
);
8507 window_and_pixmap_id
= build_string (buffer
);
8509 sprintf (buffer
, "%lu %lu",
8510 FRAME_FOREGROUND_PIXEL (f
),
8511 FRAME_BACKGROUND_PIXEL (f
));
8512 pixel_colors
= build_string (buffer
);
8514 XSETFRAME (frame
, f
);
8515 loader
= image_spec_value (img
->spec
, QCloader
, NULL
);
8517 loader
= intern ("gs-load-image");
8519 img
->lisp_data
= call6 (loader
, frame
, img
->spec
,
8520 make_number (img
->width
),
8521 make_number (img
->height
),
8522 window_and_pixmap_id
,
8524 return PROCESSP (img
->lisp_data
);
8528 /* Kill the Ghostscript process that was started to fill PIXMAP on
8529 frame F. Called from XTread_socket when receiving an event
8530 telling Emacs that Ghostscript has finished drawing. */
8533 x_kill_gs_process (Pixmap pixmap
, struct frame
*f
)
8535 struct image_cache
*c
= FRAME_IMAGE_CACHE (f
);
8539 /* Find the image containing PIXMAP. */
8540 for (i
= 0; i
< c
->used
; ++i
)
8541 if (c
->images
[i
]->pixmap
== pixmap
)
8544 /* Should someone in between have cleared the image cache, for
8545 instance, give up. */
8549 /* Kill the GS process. We should have found PIXMAP in the image
8550 cache and its image should contain a process object. */
8552 xassert (PROCESSP (img
->lisp_data
));
8553 Fkill_process (img
->lisp_data
, Qnil
);
8554 img
->lisp_data
= Qnil
;
8556 #if defined (HAVE_X_WINDOWS)
8558 /* On displays with a mutable colormap, figure out the colors
8559 allocated for the image by looking at the pixels of an XImage for
8561 class = FRAME_X_VISUAL (f
)->class;
8562 if (class != StaticColor
&& class != StaticGray
&& class != TrueColor
)
8568 /* Try to get an XImage for img->pixmep. */
8569 ximg
= XGetImage (FRAME_X_DISPLAY (f
), img
->pixmap
,
8570 0, 0, img
->width
, img
->height
, ~0, ZPixmap
);
8575 /* Initialize the color table. */
8576 init_color_table ();
8578 /* For each pixel of the image, look its color up in the
8579 color table. After having done so, the color table will
8580 contain an entry for each color used by the image. */
8581 for (y
= 0; y
< img
->height
; ++y
)
8582 for (x
= 0; x
< img
->width
; ++x
)
8584 unsigned long pixel
= XGetPixel (ximg
, x
, y
);
8585 lookup_pixel_color (f
, pixel
);
8588 /* Record colors in the image. Free color table and XImage. */
8589 #ifdef COLOR_TABLE_SUPPORT
8590 img
->colors
= colors_in_color_table (&img
->ncolors
);
8591 free_color_table ();
8593 XDestroyImage (ximg
);
8595 #if 0 /* This doesn't seem to be the case. If we free the colors
8596 here, we get a BadAccess later in x_clear_image when
8597 freeing the colors. */
8598 /* We have allocated colors once, but Ghostscript has also
8599 allocated colors on behalf of us. So, to get the
8600 reference counts right, free them once. */
8602 x_free_colors (f
, img
->colors
, img
->ncolors
);
8606 image_error ("Cannot get X image of `%s'; colors will not be freed",
8611 #endif /* HAVE_X_WINDOWS */
8613 /* Now that we have the pixmap, compute mask and transform the
8614 image if requested. */
8616 postprocess_image (f
, img
);
8620 #endif /* HAVE_GHOSTSCRIPT */
8623 /***********************************************************************
8625 ***********************************************************************/
8629 DEFUN ("imagep", Fimagep
, Simagep
, 1, 1, 0,
8630 doc
: /* Value is non-nil if SPEC is a valid image specification. */)
8633 return valid_image_p (spec
) ? Qt
: Qnil
;
8637 DEFUN ("lookup-image", Flookup_image
, Slookup_image
, 1, 1, 0, "")
8642 if (valid_image_p (spec
))
8643 id
= lookup_image (SELECTED_FRAME (), spec
);
8646 return make_number (id
);
8649 #endif /* GLYPH_DEBUG != 0 */
8652 /***********************************************************************
8654 ***********************************************************************/
8657 /* Image types that rely on external libraries are loaded dynamically
8658 if the library is available. */
8659 #define CHECK_LIB_AVAILABLE(image_type, init_lib_fn, libraries) \
8660 define_image_type (image_type, init_lib_fn (libraries))
8662 #define CHECK_LIB_AVAILABLE(image_type, init_lib_fn, libraries) \
8663 define_image_type (image_type, 1)
8664 #endif /* HAVE_NTGUI */
8666 DEFUN ("init-image-library", Finit_image_library
, Sinit_image_library
, 2, 2, 0,
8667 doc
: /* Initialize image library implementing image type TYPE.
8668 Return non-nil if TYPE is a supported image type.
8670 Image types pbm and xbm are prebuilt; other types are loaded here.
8671 Libraries to load are specified in alist LIBRARIES (usually, the value
8672 of `dynamic-library-alist', which see). */)
8673 (Lisp_Object type
, Lisp_Object libraries
)
8676 /* Don't try to reload the library. */
8677 Lisp_Object tested
= Fassq (type
, Vlibrary_cache
);
8679 return XCDR (tested
);
8682 /* Types pbm and xbm are built-in and always available. */
8683 if (EQ (type
, Qpbm
) || EQ (type
, Qxbm
))
8686 #if defined (HAVE_XPM) || defined (HAVE_NS)
8687 if (EQ (type
, Qxpm
))
8688 return CHECK_LIB_AVAILABLE (&xpm_type
, init_xpm_functions
, libraries
);
8691 #if defined (HAVE_JPEG) || defined (HAVE_NS)
8692 if (EQ (type
, Qjpeg
))
8693 return CHECK_LIB_AVAILABLE (&jpeg_type
, init_jpeg_functions
, libraries
);
8696 #if defined (HAVE_TIFF) || defined (HAVE_NS)
8697 if (EQ (type
, Qtiff
))
8698 return CHECK_LIB_AVAILABLE (&tiff_type
, init_tiff_functions
, libraries
);
8701 #if defined (HAVE_GIF) || defined (HAVE_NS)
8702 if (EQ (type
, Qgif
))
8703 return CHECK_LIB_AVAILABLE (&gif_type
, init_gif_functions
, libraries
);
8706 #if defined (HAVE_PNG) || defined (HAVE_NS)
8707 if (EQ (type
, Qpng
))
8708 return CHECK_LIB_AVAILABLE (&png_type
, init_png_functions
, libraries
);
8711 #if defined (HAVE_RSVG)
8712 if (EQ (type
, Qsvg
))
8713 return CHECK_LIB_AVAILABLE (&svg_type
, init_svg_functions
, libraries
);
8716 #if defined (HAVE_IMAGEMAGICK)
8717 if (EQ (type
, Qimagemagick
))
8718 return CHECK_LIB_AVAILABLE (&imagemagick_type
, init_imagemagick_functions
,
8722 #ifdef HAVE_GHOSTSCRIPT
8723 if (EQ (type
, Qpostscript
))
8724 return CHECK_LIB_AVAILABLE (&gs_type
, init_gs_functions
, libraries
);
8727 /* If the type is not recognized, avoid testing it ever again. */
8728 CACHE_IMAGE_TYPE (type
, Qnil
);
8733 syms_of_image (void)
8735 /* Initialize this only once, since that's what we do with Vimage_types
8736 and they are supposed to be in sync. Initializing here gives correct
8737 operation on GNU/Linux of calling dump-emacs after loading some images. */
8740 /* Must be defined now becase we're going to update it below, while
8741 defining the supported image types. */
8742 DEFVAR_LISP ("image-types", Vimage_types
,
8743 doc
: /* List of potentially supported image types.
8744 Each element of the list is a symbol for an image type, like 'jpeg or 'png.
8745 To check whether it is really supported, use `image-type-available-p'. */);
8746 Vimage_types
= Qnil
;
8748 DEFVAR_LISP ("max-image-size", Vmax_image_size
,
8749 doc
: /* Maximum size of images.
8750 Emacs will not load an image into memory if its pixel width or
8751 pixel height exceeds this limit.
8753 If the value is an integer, it directly specifies the maximum
8754 image height and width, measured in pixels. If it is a floating
8755 point number, it specifies the maximum image height and width
8756 as a ratio to the frame height and width. If the value is
8757 non-numeric, there is no explicit limit on the size of images. */);
8758 Vmax_image_size
= make_float (MAX_IMAGE_SIZE
);
8760 DEFSYM (Qpbm
, "pbm");
8761 ADD_IMAGE_TYPE (Qpbm
);
8763 DEFSYM (Qxbm
, "xbm");
8764 ADD_IMAGE_TYPE (Qxbm
);
8766 define_image_type (&xbm_type
, 1);
8767 define_image_type (&pbm_type
, 1);
8769 DEFSYM (Qcount
, "count");
8770 DEFSYM (Qextension_data
, "extension-data");
8771 DEFSYM (Qdelay
, "delay");
8773 DEFSYM (QCascent
, ":ascent");
8774 DEFSYM (QCmargin
, ":margin");
8775 DEFSYM (QCrelief
, ":relief");
8776 DEFSYM (QCconversion
, ":conversion");
8777 DEFSYM (QCcolor_symbols
, ":color-symbols");
8778 DEFSYM (QCheuristic_mask
, ":heuristic-mask");
8779 DEFSYM (QCindex
, ":index");
8780 DEFSYM (QCgeometry
, ":geometry");
8781 DEFSYM (QCcrop
, ":crop");
8782 DEFSYM (QCrotation
, ":rotation");
8783 DEFSYM (QCmatrix
, ":matrix");
8784 DEFSYM (QCcolor_adjustment
, ":color-adjustment");
8785 DEFSYM (QCmask
, ":mask");
8787 DEFSYM (Qlaplace
, "laplace");
8788 DEFSYM (Qemboss
, "emboss");
8789 DEFSYM (Qedge_detection
, "edge-detection");
8790 DEFSYM (Qheuristic
, "heuristic");
8792 DEFSYM (Qpostscript
, "postscript");
8793 #ifdef HAVE_GHOSTSCRIPT
8794 ADD_IMAGE_TYPE (Qpostscript
);
8795 DEFSYM (QCloader
, ":loader");
8796 DEFSYM (QCbounding_box
, ":bounding-box");
8797 DEFSYM (QCpt_width
, ":pt-width");
8798 DEFSYM (QCpt_height
, ":pt-height");
8799 #endif /* HAVE_GHOSTSCRIPT */
8802 DEFSYM (Qlibpng_version
, "libpng-version");
8803 Fset (Qlibpng_version
,
8805 make_number (PNG_LIBPNG_VER
)
8812 #if defined (HAVE_XPM) || defined (HAVE_NS)
8813 DEFSYM (Qxpm
, "xpm");
8814 ADD_IMAGE_TYPE (Qxpm
);
8817 #if defined (HAVE_JPEG) || defined (HAVE_NS)
8818 DEFSYM (Qjpeg
, "jpeg");
8819 ADD_IMAGE_TYPE (Qjpeg
);
8822 #if defined (HAVE_TIFF) || defined (HAVE_NS)
8823 DEFSYM (Qtiff
, "tiff");
8824 ADD_IMAGE_TYPE (Qtiff
);
8827 #if defined (HAVE_GIF) || defined (HAVE_NS)
8828 DEFSYM (Qgif
, "gif");
8829 ADD_IMAGE_TYPE (Qgif
);
8832 #if defined (HAVE_PNG) || defined (HAVE_NS)
8833 DEFSYM (Qpng
, "png");
8834 ADD_IMAGE_TYPE (Qpng
);
8837 #if defined (HAVE_IMAGEMAGICK)
8838 DEFSYM (Qimagemagick
, "imagemagick");
8839 ADD_IMAGE_TYPE (Qimagemagick
);
8842 #if defined (HAVE_RSVG)
8843 DEFSYM (Qsvg
, "svg");
8844 ADD_IMAGE_TYPE (Qsvg
);
8846 /* Other libraries used directly by svg code. */
8847 DEFSYM (Qgdk_pixbuf
, "gdk-pixbuf");
8848 DEFSYM (Qglib
, "glib");
8849 DEFSYM (Qgobject
, "gobject");
8850 #endif /* HAVE_NTGUI */
8851 #endif /* HAVE_RSVG */
8853 defsubr (&Sinit_image_library
);
8854 #ifdef HAVE_IMAGEMAGICK
8855 defsubr (&Simagemagick_types
);
8857 defsubr (&Sclear_image_cache
);
8858 defsubr (&Simage_flush
);
8859 defsubr (&Simage_size
);
8860 defsubr (&Simage_mask_p
);
8861 defsubr (&Simage_metadata
);
8865 defsubr (&Slookup_image
);
8868 DEFVAR_BOOL ("cross-disabled-images", cross_disabled_images
,
8869 doc
: /* Non-nil means always draw a cross over disabled images.
8870 Disabled images are those having a `:conversion disabled' property.
8871 A cross is always drawn on black & white displays. */);
8872 cross_disabled_images
= 0;
8874 DEFVAR_LISP ("x-bitmap-file-path", Vx_bitmap_file_path
,
8875 doc
: /* List of directories to search for window system bitmap files. */);
8876 Vx_bitmap_file_path
= decode_env_path ((char *) 0, PATH_BITMAPS
);
8878 DEFVAR_LISP ("image-cache-eviction-delay", Vimage_cache_eviction_delay
,
8879 doc
: /* Maximum time after which images are removed from the cache.
8880 When an image has not been displayed this many seconds, Emacs
8881 automatically removes it from the image cache. If the cache contains
8882 a large number of images, the actual eviction time may be shorter.
8883 The value can also be nil, meaning the cache is never cleared.
8885 The function `clear-image-cache' disregards this variable. */);
8886 Vimage_cache_eviction_delay
= make_number (300);
8887 #ifdef HAVE_IMAGEMAGICK
8888 DEFVAR_LISP ("imagemagick-render-type", Vimagemagick_render_type
,
8889 doc
: /* Choose between ImageMagick render methods. */);