Commit | Line | Data |
---|---|---|
edfda783 AR |
1 | /* Image support for the NeXT/Open/GNUstep and MacOSX window system. |
2 | Copyright (C) 1989, 1992, 1993, 1994, 2005, 2006, 2008, | |
3 | Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3, or (at your option) | |
10 | any later version. | |
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 | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
20 | Boston, MA 02110-1301, USA. | |
21 | ||
22 | Originally by Carl Edman | |
23 | Updated by Christian Limpach (chris@nice.ch) | |
24 | OpenStep/Rhapsody port by Scott Bender (sbender@harmony-ds.com) | |
25 | MacOSX/Aqua port by Christophe de Dinechin (descubes@earthlink.net) | |
26 | GNUstep port and post-20 update by Adrian Robert (arobert@cogsci.ucsd.edu) | |
27 | ||
28 | */ | |
29 | ||
30 | #include "config.h" | |
31 | #include "lisp.h" | |
32 | #include "dispextern.h" | |
33 | #include "nsterm.h" | |
34 | #include "frame.h" | |
35 | ||
36 | extern Lisp_Object QCfile, QCdata; | |
37 | ||
38 | /* call tracing */ | |
39 | #if 0 | |
40 | int image_trace_num = 0; | |
41 | #define NSTRACE(x) fprintf (stderr, "%s:%d: [%d] " #x "\n", \ | |
42 | __FILE__, __LINE__, ++image_trace_num) | |
43 | #else | |
44 | #define NSTRACE(x) | |
45 | #endif | |
46 | ||
47 | ||
48 | /* ========================================================================== | |
49 | ||
50 | C interface. This allows easy calling from C files. We could just | |
51 | compile everything as Objective-C, but that might mean slower | |
52 | compilation and possible difficulties on some platforms.. | |
53 | ||
54 | ========================================================================== */ | |
55 | ||
56 | void * | |
57 | ns_image_from_XBM (unsigned char *bits, int width, int height) | |
58 | { | |
59 | NSTRACE (ns_image_from_XBM); | |
60 | return [[EmacsImage alloc] initFromXBM: bits | |
61 | width: width height: height | |
62 | flip: YES]; | |
63 | } | |
64 | ||
65 | void * | |
66 | ns_image_for_XPM (int width, int height, int depth) | |
67 | { | |
68 | NSTRACE (ns_image_for_XPM); | |
69 | return [[EmacsImage alloc] initForXPMWithDepth: depth | |
70 | width: width height: height]; | |
71 | } | |
72 | ||
73 | void * | |
74 | ns_image_from_file (Lisp_Object file) | |
75 | { | |
76 | NSTRACE (ns_image_from_bitmap_file); | |
77 | return [EmacsImage allocInitFromFile: file]; | |
78 | } | |
79 | ||
80 | int | |
81 | ns_load_image (struct frame *f, struct image *img, | |
82 | Lisp_Object spec_file, Lisp_Object spec_data) | |
83 | { | |
84 | NSTRACE (ns_load_image); | |
85 | ||
86 | EmacsImage *eImg; | |
87 | NSSize size; | |
88 | ||
89 | if (NILP (spec_data)) | |
90 | { | |
91 | eImg = [EmacsImage allocInitFromFile: spec_file]; | |
92 | } | |
93 | else | |
94 | { | |
95 | NSData *data = [NSData dataWithBytes: XSTRING (spec_data)->data | |
96 | length: SBYTES (spec_data)]; | |
97 | eImg = [[EmacsImage alloc] initWithData: data]; | |
98 | [eImg setPixmapData]; | |
99 | } | |
100 | ||
101 | if (eImg == nil) | |
102 | { | |
103 | add_to_log ("Unable to load image %s", img->spec, Qnil); | |
104 | return 0; | |
105 | } | |
106 | ||
107 | size = [eImg size]; | |
108 | img->width = size.width; | |
109 | img->height = size.height; | |
110 | ||
111 | /* 4) set img->pixmap = emacsimage */ | |
112 | img->pixmap = eImg; | |
113 | return 1; | |
114 | } | |
115 | ||
116 | ||
117 | int | |
118 | ns_image_width (void *img) | |
119 | { | |
120 | return [(id)img size].width; | |
121 | } | |
122 | ||
123 | int | |
124 | ns_image_height (void *img) | |
125 | { | |
126 | return [(id)img size].height; | |
127 | } | |
128 | ||
129 | unsigned long | |
130 | ns_get_pixel (void *img, int x, int y) | |
131 | { | |
132 | return [(EmacsImage *)img getPixelAtX: x Y: y]; | |
133 | } | |
134 | ||
135 | void | |
136 | ns_put_pixel (void *img, int x, int y, unsigned long argb) | |
137 | { | |
138 | unsigned char alpha = (argb >> 24) & 0xFF; | |
139 | if (alpha == 0) | |
140 | alpha = 0xFF; | |
141 | [(EmacsImage *)img setPixelAtX: x Y: y toRed: (argb >> 16) & 0xFF | |
142 | green: (argb >> 8) & 0xFF blue: (argb & 0xFF) alpha: alpha]; | |
143 | } | |
144 | ||
145 | void | |
146 | ns_set_alpha (void *img, int x, int y, unsigned char a) | |
147 | { | |
148 | [(EmacsImage *)img setAlphaAtX: x Y: y to: a]; | |
149 | } | |
150 | ||
151 | ||
152 | /* ========================================================================== | |
153 | ||
154 | Class supporting bitmaps and images of various sorts. | |
155 | ||
156 | ========================================================================== */ | |
157 | ||
158 | @implementation EmacsImage | |
159 | ||
160 | static EmacsImage *ImageList = nil; | |
161 | ||
162 | + allocInitFromFile: (Lisp_Object)file | |
163 | { | |
164 | EmacsImage *image = ImageList; | |
165 | Lisp_Object found; | |
166 | ||
167 | /* look for an existing image of the same name */ | |
168 | while (image != nil && | |
169 | [[image name] compare: [NSString stringWithUTF8String: SDATA (file)]] | |
170 | != NSOrderedSame) | |
171 | image = [image imageListNext]; | |
172 | ||
173 | if (image != nil) | |
174 | { | |
175 | [image reference]; | |
176 | return image; | |
177 | } | |
178 | ||
179 | /* Search bitmap-file-path for the file, if appropriate. */ | |
180 | found = x_find_image_file (file); | |
181 | if (!STRINGP (found)) | |
182 | return nil; | |
183 | ||
184 | image = [[EmacsImage alloc] initByReferencingFile: | |
185 | [NSString stringWithUTF8String: SDATA (found)]]; | |
186 | ||
187 | if ([image bestRepresentationForDevice: nil] == nil) | |
188 | { | |
189 | [image release]; | |
190 | return nil; | |
191 | } | |
192 | ||
193 | [image setName: [NSString stringWithUTF8String: SDATA (file)]]; | |
194 | [image reference]; | |
195 | ImageList = [image imageListSetNext: ImageList]; | |
196 | ||
197 | return image; | |
198 | } | |
199 | ||
200 | ||
201 | - reference | |
202 | { | |
203 | refCount++; | |
204 | return self; | |
205 | } | |
206 | ||
207 | ||
208 | - imageListSetNext: (id)arg | |
209 | { | |
210 | imageListNext = arg; | |
211 | return self; | |
212 | } | |
213 | ||
214 | ||
215 | - imageListNext | |
216 | { | |
217 | return imageListNext; | |
218 | } | |
219 | ||
220 | ||
221 | - (void)dealloc | |
222 | { | |
223 | id list = ImageList; | |
224 | ||
225 | if (refCount > 1) | |
226 | { | |
227 | refCount--; | |
228 | return; | |
229 | } | |
230 | ||
231 | [stippleMask release]; | |
232 | ||
233 | if (list == self) | |
234 | ImageList = imageListNext; | |
235 | else | |
236 | { | |
237 | while (list != nil && [list imageListNext] != self) | |
238 | list = [list imageListNext]; | |
239 | [list imageListSetNext: imageListNext]; | |
240 | } | |
241 | ||
242 | [super dealloc]; | |
243 | } | |
244 | ||
245 | ||
246 | - initFromXBM: (unsigned char *)bits width: (int)w height: (int)h | |
247 | flip: (BOOL)flip | |
248 | { | |
249 | return [self initFromSkipXBM: bits width: w height: h flip: flip length: 0]; | |
250 | } | |
251 | ||
252 | ||
253 | - initFromSkipXBM: (unsigned char *)bits width: (int)w height: (int)h | |
254 | flip: (BOOL)flip length: (int)length; | |
255 | { | |
256 | int bpr = (w + 7) / 8; | |
257 | unsigned char *planes[5]; | |
258 | ||
259 | [self initWithSize: NSMakeSize (w, h)]; | |
260 | ||
261 | bmRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes: NULL | |
262 | pixelsWide: w pixelsHigh: h | |
263 | bitsPerSample: 8 samplesPerPixel: 4 | |
264 | hasAlpha: YES isPlanar: YES | |
265 | colorSpaceName: NSCalibratedRGBColorSpace | |
266 | bytesPerRow: w bitsPerPixel: 0]; | |
267 | ||
268 | [bmRep getBitmapDataPlanes: planes]; | |
269 | { | |
270 | /* pull bits out to set the (bytewise) alpha mask */ | |
271 | int i, j, k; | |
272 | unsigned char *s = bits; | |
273 | unsigned char *alpha = planes[3]; | |
274 | unsigned char swt[16] = {0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, | |
275 | 3, 11, 7, 15}; | |
276 | unsigned char c, bitPat; | |
277 | ||
278 | for (j = 0; j < h; j++) | |
279 | for (i = 0; i < bpr; i++) | |
280 | { | |
281 | if (length) | |
282 | { | |
283 | unsigned char s1, s2; | |
284 | while (*s++ != 'x' && s < bits + length); | |
285 | if (s >= bits + length) | |
286 | { | |
287 | [bmRep release]; | |
288 | return nil; | |
289 | } | |
290 | #define hexchar(x) (isdigit (x) ? x - '0' : x - 'a' + 10) | |
291 | s1 = *s++; | |
292 | s2 = *s++; | |
293 | c = hexchar (s1) * 0x10 + hexchar (s2); | |
294 | } | |
295 | else | |
296 | c = *s++; | |
297 | ||
298 | bitPat = flip ? swt[c >> 4] | (swt[c & 0xf] << 4) : c ^ 255; | |
299 | for (k =0; k<8; k++) | |
300 | { | |
301 | *alpha++ = (bitPat & 0x80) ? 0xff : 0; | |
302 | bitPat <<= 1; | |
303 | } | |
304 | } | |
305 | } | |
306 | ||
307 | [self addRepresentation: bmRep]; | |
308 | ||
309 | bzero (planes[0], w*h); | |
310 | bzero (planes[1], w*h); | |
311 | bzero (planes[2], w*h); | |
312 | [self setXBMColor: [NSColor blackColor]]; | |
313 | return self; | |
314 | } | |
315 | ||
316 | ||
317 | /* Set color for a bitmap image (see initFromSkipXBM). Note that the alpha | |
318 | is used as a mask, so we just memset the entire array. */ | |
319 | - setXBMColor: (NSColor *)color | |
320 | { | |
321 | NSSize s = [self size]; | |
322 | int len = (int) s.width * s.height; | |
323 | unsigned char *planes[5]; | |
324 | float r, g, b, a; | |
325 | NSColor *rgbColor; | |
326 | ||
327 | if (bmRep == nil || color == nil) | |
328 | return; | |
329 | ||
330 | if ([color colorSpaceName] != NSCalibratedRGBColorSpace) | |
331 | rgbColor = [color colorUsingColorSpaceName: NSCalibratedRGBColorSpace]; | |
332 | else | |
333 | rgbColor = color; | |
334 | ||
335 | [rgbColor getRed: &r green: &g blue: &b alpha: &a]; | |
336 | ||
337 | [bmRep getBitmapDataPlanes: planes]; | |
338 | ||
339 | /* we used to just do this, but Cocoa seems to have a bug when rendering | |
340 | an alpha-masked image onto a dark background where it bloats the mask */ | |
341 | /* memset (planes[0..2], r, g, b*0xff, len); */ | |
342 | { | |
343 | int i, len = s.width*s.height; | |
344 | int rr = r * 0xff, gg = g * 0xff, bb = b * 0xff; | |
345 | for (i =0; i<len; i++) | |
346 | if (planes[3][i] != 0) | |
347 | { | |
348 | planes[0][i] = rr; | |
349 | planes[1][i] = gg; | |
350 | planes[2][i] = bb; | |
351 | } | |
352 | } | |
353 | } | |
354 | ||
355 | ||
356 | - initForXPMWithDepth: (int)depth width: (int)width height: (int)height | |
357 | { | |
358 | NSSize s = {width, height}; | |
359 | int i; | |
360 | ||
361 | [self initWithSize: s]; | |
362 | ||
363 | bmRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes: NULL | |
364 | pixelsWide: width pixelsHigh: height | |
365 | /* keep things simple for now */ | |
366 | bitsPerSample: 8 samplesPerPixel: 4 /*RGB+A*/ | |
367 | hasAlpha: YES isPlanar: YES | |
368 | colorSpaceName: NSCalibratedRGBColorSpace | |
369 | bytesPerRow: width bitsPerPixel: 0]; | |
370 | ||
371 | [bmRep getBitmapDataPlanes: pixmapData]; | |
372 | for (i =0; i<4; i++) | |
373 | bzero (pixmapData[i], width*height); | |
374 | [self addRepresentation: bmRep]; | |
375 | return self; | |
376 | } | |
377 | ||
378 | ||
379 | /* attempt to pull out pixmap data from a BitmapImageRep; returns NO if fails */ | |
380 | - (void) setPixmapData | |
381 | { | |
382 | NSEnumerator *reps; | |
383 | NSImageRep *rep; | |
384 | ||
385 | reps = [[self representations] objectEnumerator]; | |
386 | while (rep = (NSImageRep *) [reps nextObject]) | |
387 | { | |
388 | if ([rep respondsToSelector: @selector (getBitmapDataPlanes:)]) | |
389 | { | |
390 | bmRep = (NSBitmapImageRep *) rep; | |
391 | onTiger = [bmRep respondsToSelector: @selector (colorAtX:y:)]; | |
392 | ||
393 | if ([bmRep numberOfPlanes] >= 3) | |
394 | [bmRep getBitmapDataPlanes: pixmapData]; | |
395 | break; | |
396 | } | |
397 | } | |
398 | } | |
399 | ||
400 | ||
401 | /* note; this and next work only for image created with initForXPMWithDepth, | |
402 | initFromSkipXBM, or where setPixmapData was called successfully */ | |
403 | /* return ARGB */ | |
404 | - (unsigned long) getPixelAtX: (int)x Y: (int)y | |
405 | { | |
406 | if (bmRep == nil) | |
407 | return 0; | |
408 | ||
409 | /* this method is faster but won't work for bitmaps */ | |
410 | if (pixmapData[0] != NULL) | |
411 | { | |
412 | int loc = x + y * [self size].width; | |
413 | return (pixmapData[3][loc] << 24) /* alpha */ | |
414 | | (pixmapData[0][loc] << 16) | (pixmapData[1][loc] << 8) | |
415 | | (pixmapData[2][loc]); | |
416 | } | |
417 | else if (onTiger) | |
418 | { | |
419 | NSColor *color = [bmRep colorAtX: x y: y]; | |
420 | float r, g, b, a; | |
421 | [color getRed: &r green: &g blue: &b alpha: &a]; | |
422 | return ((int)(a * 255.0) << 24) | |
423 | | ((int)(r * 255.0) << 16) | ((int)(g * 255.0) << 8) | |
424 | | ((int)(b * 255.0)); | |
425 | ||
426 | } | |
427 | return 0; | |
428 | } | |
429 | ||
430 | - (void) setPixelAtX: (int)x Y: (int)y toRed: (unsigned char)r | |
431 | green: (unsigned char)g blue: (unsigned char)b | |
432 | alpha:(unsigned char)a; | |
433 | { | |
434 | if (bmRep == nil) | |
435 | return; | |
436 | ||
437 | if (pixmapData[0] != NULL) | |
438 | { | |
439 | int loc = x + y * [self size].width; | |
440 | pixmapData[0][loc] = r; | |
441 | pixmapData[1][loc] = g; | |
442 | pixmapData[2][loc] = b; | |
443 | pixmapData[3][loc] = a; | |
444 | } | |
445 | else if (onTiger) | |
446 | { | |
447 | [bmRep setColor: | |
448 | [NSColor colorWithCalibratedRed: r green: g blue: b alpha: a] | |
449 | atX: x y: y]; | |
450 | } | |
451 | } | |
452 | ||
453 | - (void) setAlphaAtX: (int) x Y: (int) y to: (unsigned char) a | |
454 | { | |
455 | if (bmRep == nil) | |
456 | return; | |
457 | ||
458 | if (pixmapData[0] != NULL) | |
459 | { | |
460 | int loc = x + y * [self size].width; | |
461 | ||
462 | pixmapData[3][loc] = a; | |
463 | } | |
464 | else if (onTiger) | |
465 | { | |
466 | NSColor *color = [bmRep colorAtX: x y: y]; | |
467 | color = [color colorWithAlphaComponent: (a / 255.0)]; | |
468 | [bmRep setColor: color atX: x y: y]; | |
469 | } | |
470 | } | |
471 | ||
472 | /* returns a pattern color, which is cached here */ | |
473 | - (NSColor *)stippleMask | |
474 | { | |
475 | if (stippleMask == nil) | |
476 | stippleMask = [[NSColor colorWithPatternImage: self] retain]; | |
477 | return stippleMask; | |
478 | } | |
479 | ||
480 | @end |