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