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edfda783 | 1 | /* Image support for the NeXT/Open/GNUstep and MacOSX window system. |
114f9c96 | 2 | Copyright (C) 1989, 1992, 1993, 1994, 2005, 2006, 2008, 2009, 2010 |
32d235f8 | 3 | Free Software Foundation, Inc. |
edfda783 AR |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
32d235f8 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
edfda783 | 8 | it under the terms of the GNU General Public License as published by |
32d235f8 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
edfda783 AR |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
32d235f8 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
edfda783 | 19 | |
32d235f8 | 20 | /* |
edfda783 AR |
21 | Originally by Carl Edman |
22 | Updated by Christian Limpach (chris@nice.ch) | |
23 | OpenStep/Rhapsody port by Scott Bender (sbender@harmony-ds.com) | |
24 | MacOSX/Aqua port by Christophe de Dinechin (descubes@earthlink.net) | |
25 | GNUstep port and post-20 update by Adrian Robert (arobert@cogsci.ucsd.edu) | |
edfda783 AR |
26 | */ |
27 | ||
5a06864f AR |
28 | /* This should be the first include, as it may set up #defines affecting |
29 | interpretation of even the system includes. */ | |
08a494a3 | 30 | #include <config.h> |
b024548b | 31 | #include <setjmp.h> |
5a06864f | 32 | |
edfda783 AR |
33 | #include "lisp.h" |
34 | #include "dispextern.h" | |
35 | #include "nsterm.h" | |
36 | #include "frame.h" | |
37 | ||
38 | extern Lisp_Object QCfile, QCdata; | |
39 | ||
40 | /* call tracing */ | |
41 | #if 0 | |
42 | int image_trace_num = 0; | |
43 | #define NSTRACE(x) fprintf (stderr, "%s:%d: [%d] " #x "\n", \ | |
44 | __FILE__, __LINE__, ++image_trace_num) | |
45 | #else | |
46 | #define NSTRACE(x) | |
47 | #endif | |
48 | ||
49 | ||
50 | /* ========================================================================== | |
51 | ||
52 | C interface. This allows easy calling from C files. We could just | |
53 | compile everything as Objective-C, but that might mean slower | |
54 | compilation and possible difficulties on some platforms.. | |
55 | ||
56 | ========================================================================== */ | |
57 | ||
58 | void * | |
59 | ns_image_from_XBM (unsigned char *bits, int width, int height) | |
60 | { | |
61 | NSTRACE (ns_image_from_XBM); | |
62 | return [[EmacsImage alloc] initFromXBM: bits | |
63 | width: width height: height | |
64 | flip: YES]; | |
65 | } | |
66 | ||
67 | void * | |
68 | ns_image_for_XPM (int width, int height, int depth) | |
69 | { | |
70 | NSTRACE (ns_image_for_XPM); | |
71 | return [[EmacsImage alloc] initForXPMWithDepth: depth | |
72 | width: width height: height]; | |
73 | } | |
74 | ||
75 | void * | |
76 | ns_image_from_file (Lisp_Object file) | |
77 | { | |
78 | NSTRACE (ns_image_from_bitmap_file); | |
79 | return [EmacsImage allocInitFromFile: file]; | |
80 | } | |
81 | ||
82 | int | |
83 | ns_load_image (struct frame *f, struct image *img, | |
84 | Lisp_Object spec_file, Lisp_Object spec_data) | |
85 | { | |
86 | NSTRACE (ns_load_image); | |
87 | ||
88 | EmacsImage *eImg; | |
89 | NSSize size; | |
90 | ||
91 | if (NILP (spec_data)) | |
92 | { | |
93 | eImg = [EmacsImage allocInitFromFile: spec_file]; | |
94 | } | |
95 | else | |
96 | { | |
86fa089e | 97 | NSData *data = [NSData dataWithBytes: SDATA (spec_data) |
edfda783 AR |
98 | length: SBYTES (spec_data)]; |
99 | eImg = [[EmacsImage alloc] initWithData: data]; | |
100 | [eImg setPixmapData]; | |
101 | } | |
102 | ||
103 | if (eImg == nil) | |
104 | { | |
105 | add_to_log ("Unable to load image %s", img->spec, Qnil); | |
106 | return 0; | |
107 | } | |
108 | ||
109 | size = [eImg size]; | |
110 | img->width = size.width; | |
111 | img->height = size.height; | |
112 | ||
113 | /* 4) set img->pixmap = emacsimage */ | |
114 | img->pixmap = eImg; | |
115 | return 1; | |
116 | } | |
117 | ||
118 | ||
119 | int | |
120 | ns_image_width (void *img) | |
121 | { | |
122 | return [(id)img size].width; | |
123 | } | |
124 | ||
125 | int | |
126 | ns_image_height (void *img) | |
127 | { | |
128 | return [(id)img size].height; | |
129 | } | |
130 | ||
131 | unsigned long | |
132 | ns_get_pixel (void *img, int x, int y) | |
133 | { | |
134 | return [(EmacsImage *)img getPixelAtX: x Y: y]; | |
135 | } | |
136 | ||
137 | void | |
138 | ns_put_pixel (void *img, int x, int y, unsigned long argb) | |
139 | { | |
140 | unsigned char alpha = (argb >> 24) & 0xFF; | |
141 | if (alpha == 0) | |
142 | alpha = 0xFF; | |
143 | [(EmacsImage *)img setPixelAtX: x Y: y toRed: (argb >> 16) & 0xFF | |
144 | green: (argb >> 8) & 0xFF blue: (argb & 0xFF) alpha: alpha]; | |
145 | } | |
146 | ||
147 | void | |
148 | ns_set_alpha (void *img, int x, int y, unsigned char a) | |
149 | { | |
150 | [(EmacsImage *)img setAlphaAtX: x Y: y to: a]; | |
151 | } | |
152 | ||
153 | ||
154 | /* ========================================================================== | |
155 | ||
156 | Class supporting bitmaps and images of various sorts. | |
157 | ||
158 | ========================================================================== */ | |
159 | ||
160 | @implementation EmacsImage | |
161 | ||
162 | static EmacsImage *ImageList = nil; | |
163 | ||
164 | + allocInitFromFile: (Lisp_Object)file | |
165 | { | |
166 | EmacsImage *image = ImageList; | |
4c7077c3 | 167 | NSImageRep *imgRep; |
edfda783 AR |
168 | Lisp_Object found; |
169 | ||
170 | /* look for an existing image of the same name */ | |
171 | while (image != nil && | |
172 | [[image name] compare: [NSString stringWithUTF8String: SDATA (file)]] | |
173 | != NSOrderedSame) | |
174 | image = [image imageListNext]; | |
175 | ||
176 | if (image != nil) | |
177 | { | |
178 | [image reference]; | |
179 | return image; | |
180 | } | |
181 | ||
182 | /* Search bitmap-file-path for the file, if appropriate. */ | |
183 | found = x_find_image_file (file); | |
184 | if (!STRINGP (found)) | |
185 | return nil; | |
186 | ||
187 | image = [[EmacsImage alloc] initByReferencingFile: | |
188 | [NSString stringWithUTF8String: SDATA (found)]]; | |
189 | ||
4c7077c3 AR |
190 | imgRep = [image bestRepresentationForDevice: nil]; |
191 | if (imgRep == nil) | |
edfda783 AR |
192 | { |
193 | [image release]; | |
194 | return nil; | |
195 | } | |
196 | ||
4c7077c3 AR |
197 | /* The next two lines cause the DPI of the image to be ignored. |
198 | This seems to be the behavior users expect. */ | |
199 | [image setScalesWhenResized: YES]; | |
200 | [image setSize: NSMakeSize([imgRep pixelsWide], [imgRep pixelsHigh])]; | |
201 | ||
edfda783 AR |
202 | [image setName: [NSString stringWithUTF8String: SDATA (file)]]; |
203 | [image reference]; | |
204 | ImageList = [image imageListSetNext: ImageList]; | |
205 | ||
206 | return image; | |
207 | } | |
208 | ||
209 | ||
210 | - reference | |
211 | { | |
212 | refCount++; | |
213 | return self; | |
214 | } | |
215 | ||
216 | ||
217 | - imageListSetNext: (id)arg | |
218 | { | |
219 | imageListNext = arg; | |
220 | return self; | |
221 | } | |
222 | ||
223 | ||
224 | - imageListNext | |
225 | { | |
226 | return imageListNext; | |
227 | } | |
228 | ||
229 | ||
230 | - (void)dealloc | |
231 | { | |
232 | id list = ImageList; | |
233 | ||
234 | if (refCount > 1) | |
235 | { | |
236 | refCount--; | |
237 | return; | |
238 | } | |
239 | ||
240 | [stippleMask release]; | |
241 | ||
242 | if (list == self) | |
243 | ImageList = imageListNext; | |
244 | else | |
245 | { | |
246 | while (list != nil && [list imageListNext] != self) | |
247 | list = [list imageListNext]; | |
248 | [list imageListSetNext: imageListNext]; | |
249 | } | |
250 | ||
251 | [super dealloc]; | |
252 | } | |
253 | ||
254 | ||
255 | - initFromXBM: (unsigned char *)bits width: (int)w height: (int)h | |
256 | flip: (BOOL)flip | |
257 | { | |
258 | return [self initFromSkipXBM: bits width: w height: h flip: flip length: 0]; | |
259 | } | |
260 | ||
261 | ||
262 | - initFromSkipXBM: (unsigned char *)bits width: (int)w height: (int)h | |
263 | flip: (BOOL)flip length: (int)length; | |
264 | { | |
265 | int bpr = (w + 7) / 8; | |
266 | unsigned char *planes[5]; | |
267 | ||
268 | [self initWithSize: NSMakeSize (w, h)]; | |
269 | ||
270 | bmRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes: NULL | |
271 | pixelsWide: w pixelsHigh: h | |
272 | bitsPerSample: 8 samplesPerPixel: 4 | |
273 | hasAlpha: YES isPlanar: YES | |
274 | colorSpaceName: NSCalibratedRGBColorSpace | |
275 | bytesPerRow: w bitsPerPixel: 0]; | |
276 | ||
277 | [bmRep getBitmapDataPlanes: planes]; | |
278 | { | |
279 | /* pull bits out to set the (bytewise) alpha mask */ | |
280 | int i, j, k; | |
281 | unsigned char *s = bits; | |
282 | unsigned char *alpha = planes[3]; | |
283 | unsigned char swt[16] = {0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, | |
284 | 3, 11, 7, 15}; | |
285 | unsigned char c, bitPat; | |
286 | ||
287 | for (j = 0; j < h; j++) | |
288 | for (i = 0; i < bpr; i++) | |
289 | { | |
290 | if (length) | |
291 | { | |
292 | unsigned char s1, s2; | |
293 | while (*s++ != 'x' && s < bits + length); | |
294 | if (s >= bits + length) | |
295 | { | |
296 | [bmRep release]; | |
297 | return nil; | |
298 | } | |
299 | #define hexchar(x) (isdigit (x) ? x - '0' : x - 'a' + 10) | |
300 | s1 = *s++; | |
301 | s2 = *s++; | |
302 | c = hexchar (s1) * 0x10 + hexchar (s2); | |
303 | } | |
304 | else | |
305 | c = *s++; | |
306 | ||
307 | bitPat = flip ? swt[c >> 4] | (swt[c & 0xf] << 4) : c ^ 255; | |
308 | for (k =0; k<8; k++) | |
309 | { | |
310 | *alpha++ = (bitPat & 0x80) ? 0xff : 0; | |
311 | bitPat <<= 1; | |
312 | } | |
313 | } | |
314 | } | |
315 | ||
316 | [self addRepresentation: bmRep]; | |
317 | ||
72af86bd AS |
318 | memset (planes[0], 0, w*h); |
319 | memset (planes[1], 0, w*h); | |
320 | memset (planes[2], 0, w*h); | |
edfda783 AR |
321 | [self setXBMColor: [NSColor blackColor]]; |
322 | return self; | |
323 | } | |
324 | ||
325 | ||
326 | /* Set color for a bitmap image (see initFromSkipXBM). Note that the alpha | |
327 | is used as a mask, so we just memset the entire array. */ | |
328 | - setXBMColor: (NSColor *)color | |
329 | { | |
330 | NSSize s = [self size]; | |
331 | int len = (int) s.width * s.height; | |
332 | unsigned char *planes[5]; | |
31e88bd8 | 333 | CGFloat r, g, b, a; |
edfda783 AR |
334 | NSColor *rgbColor; |
335 | ||
336 | if (bmRep == nil || color == nil) | |
337 | return; | |
338 | ||
339 | if ([color colorSpaceName] != NSCalibratedRGBColorSpace) | |
340 | rgbColor = [color colorUsingColorSpaceName: NSCalibratedRGBColorSpace]; | |
341 | else | |
342 | rgbColor = color; | |
343 | ||
344 | [rgbColor getRed: &r green: &g blue: &b alpha: &a]; | |
345 | ||
346 | [bmRep getBitmapDataPlanes: planes]; | |
347 | ||
348 | /* we used to just do this, but Cocoa seems to have a bug when rendering | |
349 | an alpha-masked image onto a dark background where it bloats the mask */ | |
350 | /* memset (planes[0..2], r, g, b*0xff, len); */ | |
351 | { | |
352 | int i, len = s.width*s.height; | |
353 | int rr = r * 0xff, gg = g * 0xff, bb = b * 0xff; | |
354 | for (i =0; i<len; i++) | |
355 | if (planes[3][i] != 0) | |
356 | { | |
357 | planes[0][i] = rr; | |
358 | planes[1][i] = gg; | |
359 | planes[2][i] = bb; | |
360 | } | |
361 | } | |
362 | } | |
363 | ||
364 | ||
365 | - initForXPMWithDepth: (int)depth width: (int)width height: (int)height | |
366 | { | |
367 | NSSize s = {width, height}; | |
368 | int i; | |
369 | ||
370 | [self initWithSize: s]; | |
371 | ||
372 | bmRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes: NULL | |
373 | pixelsWide: width pixelsHigh: height | |
374 | /* keep things simple for now */ | |
375 | bitsPerSample: 8 samplesPerPixel: 4 /*RGB+A*/ | |
376 | hasAlpha: YES isPlanar: YES | |
377 | colorSpaceName: NSCalibratedRGBColorSpace | |
378 | bytesPerRow: width bitsPerPixel: 0]; | |
379 | ||
380 | [bmRep getBitmapDataPlanes: pixmapData]; | |
381 | for (i =0; i<4; i++) | |
72af86bd | 382 | memset (pixmapData[i], 0, width*height); |
edfda783 AR |
383 | [self addRepresentation: bmRep]; |
384 | return self; | |
385 | } | |
386 | ||
387 | ||
388 | /* attempt to pull out pixmap data from a BitmapImageRep; returns NO if fails */ | |
389 | - (void) setPixmapData | |
390 | { | |
391 | NSEnumerator *reps; | |
392 | NSImageRep *rep; | |
393 | ||
394 | reps = [[self representations] objectEnumerator]; | |
395 | while (rep = (NSImageRep *) [reps nextObject]) | |
396 | { | |
397 | if ([rep respondsToSelector: @selector (getBitmapDataPlanes:)]) | |
398 | { | |
399 | bmRep = (NSBitmapImageRep *) rep; | |
400 | onTiger = [bmRep respondsToSelector: @selector (colorAtX:y:)]; | |
401 | ||
402 | if ([bmRep numberOfPlanes] >= 3) | |
403 | [bmRep getBitmapDataPlanes: pixmapData]; | |
e0d2e69a AR |
404 | |
405 | /* The next two lines cause the DPI of the image to be ignored. | |
406 | This seems to be the behavior users expect. */ | |
407 | [self setScalesWhenResized: YES]; | |
408 | [self setSize: NSMakeSize([bmRep pixelsWide], [bmRep pixelsHigh])]; | |
409 | ||
edfda783 AR |
410 | break; |
411 | } | |
412 | } | |
413 | } | |
414 | ||
415 | ||
416 | /* note; this and next work only for image created with initForXPMWithDepth, | |
417 | initFromSkipXBM, or where setPixmapData was called successfully */ | |
418 | /* return ARGB */ | |
419 | - (unsigned long) getPixelAtX: (int)x Y: (int)y | |
420 | { | |
421 | if (bmRep == nil) | |
422 | return 0; | |
423 | ||
424 | /* this method is faster but won't work for bitmaps */ | |
425 | if (pixmapData[0] != NULL) | |
426 | { | |
427 | int loc = x + y * [self size].width; | |
428 | return (pixmapData[3][loc] << 24) /* alpha */ | |
429 | | (pixmapData[0][loc] << 16) | (pixmapData[1][loc] << 8) | |
430 | | (pixmapData[2][loc]); | |
431 | } | |
432 | else if (onTiger) | |
433 | { | |
434 | NSColor *color = [bmRep colorAtX: x y: y]; | |
31e88bd8 | 435 | CGFloat r, g, b, a; |
edfda783 AR |
436 | [color getRed: &r green: &g blue: &b alpha: &a]; |
437 | return ((int)(a * 255.0) << 24) | |
438 | | ((int)(r * 255.0) << 16) | ((int)(g * 255.0) << 8) | |
439 | | ((int)(b * 255.0)); | |
440 | ||
441 | } | |
442 | return 0; | |
443 | } | |
444 | ||
445 | - (void) setPixelAtX: (int)x Y: (int)y toRed: (unsigned char)r | |
446 | green: (unsigned char)g blue: (unsigned char)b | |
447 | alpha:(unsigned char)a; | |
448 | { | |
449 | if (bmRep == nil) | |
450 | return; | |
451 | ||
452 | if (pixmapData[0] != NULL) | |
453 | { | |
454 | int loc = x + y * [self size].width; | |
455 | pixmapData[0][loc] = r; | |
456 | pixmapData[1][loc] = g; | |
457 | pixmapData[2][loc] = b; | |
458 | pixmapData[3][loc] = a; | |
459 | } | |
460 | else if (onTiger) | |
461 | { | |
462 | [bmRep setColor: | |
d3810c21 AR |
463 | [NSColor colorWithCalibratedRed: (r/255.0) green: (g/255.0) |
464 | blue: (b/255.0) alpha: (a/255.0)] | |
edfda783 AR |
465 | atX: x y: y]; |
466 | } | |
467 | } | |
468 | ||
469 | - (void) setAlphaAtX: (int) x Y: (int) y to: (unsigned char) a | |
470 | { | |
471 | if (bmRep == nil) | |
472 | return; | |
473 | ||
474 | if (pixmapData[0] != NULL) | |
475 | { | |
476 | int loc = x + y * [self size].width; | |
477 | ||
478 | pixmapData[3][loc] = a; | |
479 | } | |
480 | else if (onTiger) | |
481 | { | |
482 | NSColor *color = [bmRep colorAtX: x y: y]; | |
483 | color = [color colorWithAlphaComponent: (a / 255.0)]; | |
484 | [bmRep setColor: color atX: x y: y]; | |
485 | } | |
486 | } | |
487 | ||
488 | /* returns a pattern color, which is cached here */ | |
489 | - (NSColor *)stippleMask | |
490 | { | |
491 | if (stippleMask == nil) | |
492 | stippleMask = [[NSColor colorWithPatternImage: self] retain]; | |
493 | return stippleMask; | |
494 | } | |
495 | ||
496 | @end | |
0ae1e5e5 | 497 | |
2f8e74bb | 498 | // arch-tag: 6b310280-6892-4e5e-8f34-41c4d384874f |