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.
5 This file is part of GNU Emacs.
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 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
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)
30 #include "dispextern.h"
34 extern Lisp_Object QCfile, QCdata;
38 int image_trace_num = 0;
39 #define NSTRACE(x) fprintf (stderr, "%s:%d: [%d] " #x "\n", \
40 __FILE__, __LINE__, ++image_trace_num)
46 /* ==========================================================================
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..
52 ========================================================================== */
55 ns_image_from_XBM (unsigned char *bits, int width, int height)
57 NSTRACE (ns_image_from_XBM);
58 return [[EmacsImage alloc] initFromXBM: bits
59 width: width height: height
64 ns_image_for_XPM (int width, int height, int depth)
66 NSTRACE (ns_image_for_XPM);
67 return [[EmacsImage alloc] initForXPMWithDepth: depth
68 width: width height: height];
72 ns_image_from_file (Lisp_Object file)
74 NSTRACE (ns_image_from_bitmap_file);
75 return [EmacsImage allocInitFromFile: file];
79 ns_load_image (struct frame *f, struct image *img,
80 Lisp_Object spec_file, Lisp_Object spec_data)
82 NSTRACE (ns_load_image);
89 eImg = [EmacsImage allocInitFromFile: spec_file];
93 NSData *data = [NSData dataWithBytes: XSTRING (spec_data)->data
94 length: SBYTES (spec_data)];
95 eImg = [[EmacsImage alloc] initWithData: data];
101 add_to_log ("Unable to load image %s", img->spec, Qnil);
106 img->width = size.width;
107 img->height = size.height;
109 /* 4) set img->pixmap = emacsimage */
116 ns_image_width (void *img)
118 return [(id)img size].width;
122 ns_image_height (void *img)
124 return [(id)img size].height;
128 ns_get_pixel (void *img, int x, int y)
130 return [(EmacsImage *)img getPixelAtX: x Y: y];
134 ns_put_pixel (void *img, int x, int y, unsigned long argb)
136 unsigned char alpha = (argb >> 24) & 0xFF;
139 [(EmacsImage *)img setPixelAtX: x Y: y toRed: (argb >> 16) & 0xFF
140 green: (argb >> 8) & 0xFF blue: (argb & 0xFF) alpha: alpha];
144 ns_set_alpha (void *img, int x, int y, unsigned char a)
146 [(EmacsImage *)img setAlphaAtX: x Y: y to: a];
150 /* ==========================================================================
152 Class supporting bitmaps and images of various sorts.
154 ========================================================================== */
156 @implementation EmacsImage
158 static EmacsImage *ImageList = nil;
160 + allocInitFromFile: (Lisp_Object)file
162 EmacsImage *image = ImageList;
165 /* look for an existing image of the same name */
166 while (image != nil &&
167 [[image name] compare: [NSString stringWithUTF8String: SDATA (file)]]
169 image = [image imageListNext];
177 /* Search bitmap-file-path for the file, if appropriate. */
178 found = x_find_image_file (file);
179 if (!STRINGP (found))
182 image = [[EmacsImage alloc] initByReferencingFile:
183 [NSString stringWithUTF8String: SDATA (found)]];
185 if ([image bestRepresentationForDevice: nil] == nil)
191 [image setName: [NSString stringWithUTF8String: SDATA (file)]];
193 ImageList = [image imageListSetNext: ImageList];
206 - imageListSetNext: (id)arg
215 return imageListNext;
229 [stippleMask release];
232 ImageList = imageListNext;
235 while (list != nil && [list imageListNext] != self)
236 list = [list imageListNext];
237 [list imageListSetNext: imageListNext];
244 - initFromXBM: (unsigned char *)bits width: (int)w height: (int)h
247 return [self initFromSkipXBM: bits width: w height: h flip: flip length: 0];
251 - initFromSkipXBM: (unsigned char *)bits width: (int)w height: (int)h
252 flip: (BOOL)flip length: (int)length;
254 int bpr = (w + 7) / 8;
255 unsigned char *planes[5];
257 [self initWithSize: NSMakeSize (w, h)];
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];
266 [bmRep getBitmapDataPlanes: planes];
268 /* pull bits out to set the (bytewise) alpha mask */
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,
274 unsigned char c, bitPat;
276 for (j = 0; j < h; j++)
277 for (i = 0; i < bpr; i++)
281 unsigned char s1, s2;
282 while (*s++ != 'x' && s < bits + length);
283 if (s >= bits + length)
288 #define hexchar(x) (isdigit (x) ? x - '0' : x - 'a' + 10)
291 c = hexchar (s1) * 0x10 + hexchar (s2);
296 bitPat = flip ? swt[c >> 4] | (swt[c & 0xf] << 4) : c ^ 255;
299 *alpha++ = (bitPat & 0x80) ? 0xff : 0;
305 [self addRepresentation: bmRep];
307 bzero (planes[0], w*h);
308 bzero (planes[1], w*h);
309 bzero (planes[2], w*h);
310 [self setXBMColor: [NSColor blackColor]];
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
319 NSSize s = [self size];
320 int len = (int) s.width * s.height;
321 unsigned char *planes[5];
325 if (bmRep == nil || color == nil)
328 if ([color colorSpaceName] != NSCalibratedRGBColorSpace)
329 rgbColor = [color colorUsingColorSpaceName: NSCalibratedRGBColorSpace];
333 [rgbColor getRed: &r green: &g blue: &b alpha: &a];
335 [bmRep getBitmapDataPlanes: planes];
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); */
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)
354 - initForXPMWithDepth: (int)depth width: (int)width height: (int)height
356 NSSize s = {width, height};
359 [self initWithSize: s];
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];
369 [bmRep getBitmapDataPlanes: pixmapData];
371 bzero (pixmapData[i], width*height);
372 [self addRepresentation: bmRep];
377 /* attempt to pull out pixmap data from a BitmapImageRep; returns NO if fails */
378 - (void) setPixmapData
383 reps = [[self representations] objectEnumerator];
384 while (rep = (NSImageRep *) [reps nextObject])
386 if ([rep respondsToSelector: @selector (getBitmapDataPlanes:)])
388 bmRep = (NSBitmapImageRep *) rep;
389 onTiger = [bmRep respondsToSelector: @selector (colorAtX:y:)];
391 if ([bmRep numberOfPlanes] >= 3)
392 [bmRep getBitmapDataPlanes: pixmapData];
399 /* note; this and next work only for image created with initForXPMWithDepth,
400 initFromSkipXBM, or where setPixmapData was called successfully */
402 - (unsigned long) getPixelAtX: (int)x Y: (int)y
407 /* this method is faster but won't work for bitmaps */
408 if (pixmapData[0] != NULL)
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]);
417 NSColor *color = [bmRep colorAtX: x y: y];
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));
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;
435 if (pixmapData[0] != NULL)
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;
446 [NSColor colorWithCalibratedRed: r green: g blue: b alpha: a]
451 - (void) setAlphaAtX: (int) x Y: (int) y to: (unsigned char) a
456 if (pixmapData[0] != NULL)
458 int loc = x + y * [self size].width;
460 pixmapData[3][loc] = a;
464 NSColor *color = [bmRep colorAtX: x y: y];
465 color = [color colorWithAlphaComponent: (a / 255.0)];
466 [bmRep setColor: color atX: x y: y];
470 /* returns a pattern color, which is cached here */
471 - (NSColor *)stippleMask
473 if (stippleMask == nil)
474 stippleMask = [[NSColor colorWithPatternImage: self] retain];
480 // arch-tag: 6b310280-6892-4e5e-8f34-41c4d384874f