forked from fgeller/emacs-mac-port
-
Notifications
You must be signed in to change notification settings - Fork 0
/
image.c
10190 lines (8502 loc) · 272 KB
/
image.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* Functions for image support on window system.
Copyright (C) 1989, 1992-2012 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <stdio.h>
#include <unistd.h>
#ifdef HAVE_PNG
#if defined HAVE_LIBPNG_PNG_H
# include <libpng/png.h>
#else
# include <png.h>
#endif
#endif
#include <setjmp.h>
#include <c-ctype.h>
/* This makes the fields of a Display accessible, in Xlib header files. */
#define XLIB_ILLEGAL_ACCESS
#include "lisp.h"
#include "frame.h"
#include "window.h"
#include "dispextern.h"
#include "blockinput.h"
#include "systime.h"
#include <epaths.h>
#include "character.h"
#include "coding.h"
#include "termhooks.h"
#include "font.h"
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif /* HAVE_SYS_STAT_H */
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif /* HAVE_SYS_TYPES_H */
#ifdef HAVE_WINDOW_SYSTEM
#include TERM_HEADER
#endif /* HAVE_WINDOW_SYSTEM */
#ifdef HAVE_X_WINDOWS
#define COLOR_TABLE_SUPPORT 1
typedef struct x_bitmap_record Bitmap_Record;
#define GET_PIXEL(ximg, x, y) XGetPixel (ximg, x, y)
#define NO_PIXMAP None
#define RGB_PIXEL_COLOR unsigned long
#define PIX_MASK_RETAIN 0
#define PIX_MASK_DRAW 1
#endif /* HAVE_X_WINDOWS */
#ifdef HAVE_NTGUI
/* We need (or want) w32.h only when we're _not_ compiling for Cygwin. */
#ifdef WINDOWSNT
# include "w32.h"
#endif
/* W32_TODO : Color tables on W32. */
#undef COLOR_TABLE_SUPPORT
typedef struct w32_bitmap_record Bitmap_Record;
#define GET_PIXEL(ximg, x, y) GetPixel (ximg, x, y)
#define NO_PIXMAP 0
#define RGB_PIXEL_COLOR COLORREF
#define PIX_MASK_RETAIN 0
#define PIX_MASK_DRAW 1
#define x_defined_color w32_defined_color
#define DefaultDepthOfScreen(screen) (one_w32_display_info.n_cbits)
/* Version of libpng that we were compiled with, or -1 if no PNG
support was compiled in. This is tested by w32-win.el to correctly
set up the alist used to search for PNG libraries. */
Lisp_Object Qlibpng_version;
#endif /* HAVE_NTGUI */
#ifdef HAVE_MACGUI
#undef COLOR_TABLE_SUPPORT
#define ZPixmap 0 /* arbitrary */
typedef struct mac_bitmap_record Bitmap_Record;
#define GET_PIXEL(ximg, x, y) XGetPixel(ximg, x, y)
#define NO_PIXMAP 0
#define RGB_PIXEL_COLOR unsigned long
#define PIX_MASK_DRAW 255
#define PIX_MASK_RETAIN 0
#define x_defined_color mac_defined_color
#define DefaultDepthOfScreen(screen) (one_mac_display_info.n_planes)
#endif /* HAVE_MACGUI */
#ifdef HAVE_NS
#undef COLOR_TABLE_SUPPORT
typedef struct ns_bitmap_record Bitmap_Record;
#define GET_PIXEL(ximg, x, y) XGetPixel (ximg, x, y)
#define NO_PIXMAP 0
#define RGB_PIXEL_COLOR unsigned long
#define ZPixmap 0
#define PIX_MASK_RETAIN 0
#define PIX_MASK_DRAW 1
#define x_defined_color(f, name, color_def, alloc) \
ns_defined_color (f, name, color_def, alloc, 0)
#define DefaultDepthOfScreen(screen) x_display_list->n_planes
#endif /* HAVE_NS */
/* The symbol `postscript' identifying images of this type. */
static Lisp_Object Qpostscript;
static void x_disable_image (struct frame *, struct image *);
static void x_edge_detection (struct frame *, struct image *, Lisp_Object,
Lisp_Object);
static void init_color_table (void);
static unsigned long lookup_rgb_color (struct frame *f, int r, int g, int b);
#ifdef COLOR_TABLE_SUPPORT
static void free_color_table (void);
static unsigned long *colors_in_color_table (int *n);
#endif
/* Code to deal with bitmaps. Bitmaps are referenced by their bitmap
id, which is just an int that this section returns. Bitmaps are
reference counted so they can be shared among frames.
Bitmap indices are guaranteed to be > 0, so a negative number can
be used to indicate no bitmap.
If you use x_create_bitmap_from_data, then you must keep track of
the bitmaps yourself. That is, creating a bitmap from the same
data more than once will not be caught. */
/* For Mac OS X high resolution versions of images, the actual bitmap
width/height (in pixels) is not necessarily the same as the logical
image width/height (in points). We should use the former for
bitmap or pixel-level operations especially on postprocessing.
The width and height arguments to x_create_x_image_and_pixmap
should be specified in pixels, but we don't care about the
arguments to XGetImage and x_put_x_image, because the Mac port
doesn't use these arguments. For four_corners_best, we set
img->corners using pixel coordinates rather than passing pixel
width and height as its arguments. */
#ifdef HAVE_MACGUI
#define IMAGE_BITMAP_WIDTH(img) ((img)->pixmap->width)
#define IMAGE_BITMAP_HEIGHT(img) ((img)->pixmap->height)
#else
#define IMAGE_BITMAP_WIDTH(img) ((img)->width)
#define IMAGE_BITMAP_HEIGHT(img) ((img)->height)
#endif
#ifdef HAVE_MACGUI
static XImagePtr
XGetImage (Display *display, Pixmap pixmap, int x, int y, unsigned int width,
unsigned int height, unsigned long plane_mask, int format)
{
return pixmap;
}
static void
XPutPixel (XImagePtr ximage, int x, int y, unsigned long pixel)
{
if (ximage->bits_per_pixel == 32)
((unsigned int *)(ximage->data + y * ximage->bytes_per_line))[x] = pixel;
else
((unsigned char *)(ximage->data + y * ximage->bytes_per_line))[x] = pixel;
}
static unsigned long
XGetPixel (XImagePtr ximage, int x, int y)
{
if (ximage->bits_per_pixel == 32)
return ((unsigned int *)(ximage->data + y * ximage->bytes_per_line))[x];
else
return ((unsigned char *)(ximage->data + y * ximage->bytes_per_line))[x];
}
static void
XDestroyImage (XImagePtr ximg)
{
}
static void
mac_data_provider_release_data (void *info, const void *data, size_t size)
{
xfree ((void *)data);
}
static CGImageRef
mac_create_cg_image_from_image (struct frame *f, struct image *img)
{
XImagePtr ximg = img->pixmap;
CGDataProviderRef provider;
CGImageRef result;
if (img->mask)
{
int x, y;
for (y = 0; y < ximg->height; y++)
for (x = 0; x < ximg->width; x++)
{
unsigned long color, alpha;
int dest_alpha, r, g, b;
color = XGetPixel (ximg, x, y);
alpha = XGetPixel (img->mask, x, y);
dest_alpha = 0xff - alpha;
r = RED_FROM_ULONG (color);
r = (r < dest_alpha) ? 0 : r - dest_alpha;
g = GREEN_FROM_ULONG (color);
g = (g < dest_alpha) ? 0 : g - dest_alpha;
b = BLUE_FROM_ULONG (color);
b = (b < dest_alpha) ? 0 : b - dest_alpha;
XPutPixel (ximg, x, y, ARGB_TO_ULONG (alpha, r, g, b));
}
xfree (img->mask->data);
img->mask->data = NULL;
}
block_input ();
provider = CGDataProviderCreateWithData (NULL, ximg->data,
ximg->bytes_per_line * ximg->height,
mac_data_provider_release_data);
ximg->data = NULL;
result = CGImageCreate (ximg->width, ximg->height, 8, 32,
ximg->bytes_per_line, mac_cg_color_space_rgb,
((img->mask ? kCGImageAlphaPremultipliedFirst
: kCGImageAlphaNoneSkipFirst)
| kCGBitmapByteOrder32Host),
provider, NULL, 0, kCGRenderingIntentDefault);
CGDataProviderRelease (provider);
unblock_input ();
return result;
}
#endif /* HAVE_MACGUI */
#ifdef HAVE_NS
XImagePtr
XGetImage (Display *display, Pixmap pixmap, int x, int y,
unsigned int width, unsigned int height,
unsigned long plane_mask, int format)
{
/* TODO: not sure what this function is supposed to do.. */
ns_retain_object (pixmap);
return pixmap;
}
/* use with imgs created by ns_image_for_XPM */
unsigned long
XGetPixel (XImagePtr ximage, int x, int y)
{
return ns_get_pixel (ximage, x, y);
}
/* use with imgs created by ns_image_for_XPM; alpha set to 1;
pixel is assumed to be in form RGB */
void
XPutPixel (XImagePtr ximage, int x, int y, unsigned long pixel)
{
ns_put_pixel (ximage, x, y, pixel);
}
#endif /* HAVE_NS */
/* Functions to access the contents of a bitmap, given an id. */
int
x_bitmap_height (FRAME_PTR f, ptrdiff_t id)
{
return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].height;
}
int
x_bitmap_width (FRAME_PTR f, ptrdiff_t id)
{
return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].width;
}
#if defined (HAVE_X_WINDOWS) || defined (HAVE_NTGUI)
ptrdiff_t
x_bitmap_pixmap (FRAME_PTR f, ptrdiff_t id)
{
/* HAVE_NTGUI needs the explicit cast here. */
return (ptrdiff_t) FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].pixmap;
}
#endif
#ifdef HAVE_X_WINDOWS
int
x_bitmap_mask (FRAME_PTR f, ptrdiff_t id)
{
return FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].mask;
}
#endif
/* Allocate a new bitmap record. Returns index of new record. */
static ptrdiff_t
x_allocate_bitmap_record (FRAME_PTR f)
{
Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
ptrdiff_t i;
if (dpyinfo->bitmaps_last < dpyinfo->bitmaps_size)
return ++dpyinfo->bitmaps_last;
for (i = 0; i < dpyinfo->bitmaps_size; ++i)
if (dpyinfo->bitmaps[i].refcount == 0)
return i + 1;
dpyinfo->bitmaps =
xpalloc (dpyinfo->bitmaps, &dpyinfo->bitmaps_size,
10, -1, sizeof *dpyinfo->bitmaps);
return ++dpyinfo->bitmaps_last;
}
/* Add one reference to the reference count of the bitmap with id ID. */
void
x_reference_bitmap (FRAME_PTR f, ptrdiff_t id)
{
++FRAME_X_DISPLAY_INFO (f)->bitmaps[id - 1].refcount;
}
/* Create a bitmap for frame F from a HEIGHT x WIDTH array of bits at BITS. */
ptrdiff_t
x_create_bitmap_from_data (struct frame *f, char *bits, unsigned int width, unsigned int height)
{
Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
ptrdiff_t id;
#ifdef HAVE_X_WINDOWS
Pixmap bitmap;
bitmap = XCreateBitmapFromData (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
bits, width, height);
if (! bitmap)
return -1;
#endif /* HAVE_X_WINDOWS */
#ifdef HAVE_NTGUI
Pixmap bitmap;
bitmap = CreateBitmap (width, height,
FRAME_X_DISPLAY_INFO (XFRAME (frame))->n_planes,
FRAME_X_DISPLAY_INFO (XFRAME (frame))->n_cbits,
bits);
if (! bitmap)
return -1;
#endif /* HAVE_NTGUI */
#ifdef HAVE_MACGUI
/* MAC_TODO: for now fail if width is not mod 16 (toolbox requires it) */
if (width % 16 != 0)
return -1;
#endif
#ifdef HAVE_NS
void *bitmap = ns_image_from_XBM (bits, width, height);
if (!bitmap)
return -1;
#endif
id = x_allocate_bitmap_record (f);
#ifdef HAVE_MACGUI
dpyinfo->bitmaps[id - 1].bitmap_data = xmalloc (height * width);
memcpy (dpyinfo->bitmaps[id - 1].bitmap_data, bits, height * width);
#endif /* HAVE_MACGUI */
#ifdef HAVE_NS
dpyinfo->bitmaps[id - 1].img = bitmap;
dpyinfo->bitmaps[id - 1].depth = 1;
#endif
dpyinfo->bitmaps[id - 1].file = NULL;
dpyinfo->bitmaps[id - 1].height = height;
dpyinfo->bitmaps[id - 1].width = width;
dpyinfo->bitmaps[id - 1].refcount = 1;
#ifdef HAVE_X_WINDOWS
dpyinfo->bitmaps[id - 1].pixmap = bitmap;
dpyinfo->bitmaps[id - 1].have_mask = 0;
dpyinfo->bitmaps[id - 1].depth = 1;
#endif /* HAVE_X_WINDOWS */
#ifdef HAVE_NTGUI
dpyinfo->bitmaps[id - 1].pixmap = bitmap;
dpyinfo->bitmaps[id - 1].hinst = NULL;
dpyinfo->bitmaps[id - 1].depth = 1;
#endif /* HAVE_NTGUI */
return id;
}
/* Create bitmap from file FILE for frame F. */
ptrdiff_t
x_create_bitmap_from_file (struct frame *f, Lisp_Object file)
{
Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
#ifdef HAVE_MACGUI
return -1; /* MAC_TODO : bitmap support */
#endif /* HAVE_MACGUI */
#ifdef HAVE_NTGUI
return -1; /* W32_TODO : bitmap support */
#endif /* HAVE_NTGUI */
#ifdef HAVE_NS
ptrdiff_t id;
void *bitmap = ns_image_from_file (file);
if (!bitmap)
return -1;
id = x_allocate_bitmap_record (f);
dpyinfo->bitmaps[id - 1].img = bitmap;
dpyinfo->bitmaps[id - 1].refcount = 1;
dpyinfo->bitmaps[id - 1].file = xmalloc (SBYTES (file) + 1);
dpyinfo->bitmaps[id - 1].depth = 1;
dpyinfo->bitmaps[id - 1].height = ns_image_width (bitmap);
dpyinfo->bitmaps[id - 1].width = ns_image_height (bitmap);
strcpy (dpyinfo->bitmaps[id - 1].file, SSDATA (file));
return id;
#endif
#ifdef HAVE_X_WINDOWS
unsigned int width, height;
Pixmap bitmap;
int xhot, yhot, result;
ptrdiff_t id;
Lisp_Object found;
int fd;
char *filename;
/* Look for an existing bitmap with the same name. */
for (id = 0; id < dpyinfo->bitmaps_last; ++id)
{
if (dpyinfo->bitmaps[id].refcount
&& dpyinfo->bitmaps[id].file
&& !strcmp (dpyinfo->bitmaps[id].file, SSDATA (file)))
{
++dpyinfo->bitmaps[id].refcount;
return id + 1;
}
}
/* Search bitmap-file-path for the file, if appropriate. */
fd = openp (Vx_bitmap_file_path, file, Qnil, &found, Qnil);
if (fd < 0)
return -1;
emacs_close (fd);
filename = SSDATA (found);
result = XReadBitmapFile (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
filename, &width, &height, &bitmap, &xhot, &yhot);
if (result != BitmapSuccess)
return -1;
id = x_allocate_bitmap_record (f);
dpyinfo->bitmaps[id - 1].pixmap = bitmap;
dpyinfo->bitmaps[id - 1].have_mask = 0;
dpyinfo->bitmaps[id - 1].refcount = 1;
dpyinfo->bitmaps[id - 1].file = xmalloc (SBYTES (file) + 1);
dpyinfo->bitmaps[id - 1].depth = 1;
dpyinfo->bitmaps[id - 1].height = height;
dpyinfo->bitmaps[id - 1].width = width;
strcpy (dpyinfo->bitmaps[id - 1].file, SSDATA (file));
return id;
#endif /* HAVE_X_WINDOWS */
}
/* Free bitmap B. */
static void
free_bitmap_record (Display_Info *dpyinfo, Bitmap_Record *bm)
{
#ifdef HAVE_X_WINDOWS
XFreePixmap (dpyinfo->display, bm->pixmap);
if (bm->have_mask)
XFreePixmap (dpyinfo->display, bm->mask);
#endif /* HAVE_X_WINDOWS */
#ifdef HAVE_NTGUI
DeleteObject (bm->pixmap);
#endif /* HAVE_NTGUI */
#ifdef HAVE_MACGUI
xfree (bm->bitmap_data); /* Added ++kfs */
bm->bitmap_data = NULL;
#endif /* HAVE_MACGUI */
#ifdef HAVE_NS
ns_release_object (bm->img);
#endif
if (bm->file)
{
xfree (bm->file);
bm->file = NULL;
}
}
/* Remove reference to bitmap with id number ID. */
void
x_destroy_bitmap (FRAME_PTR f, ptrdiff_t id)
{
Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
if (id > 0)
{
Bitmap_Record *bm = &dpyinfo->bitmaps[id - 1];
if (--bm->refcount == 0)
{
block_input ();
free_bitmap_record (dpyinfo, bm);
unblock_input ();
}
}
}
/* Free all the bitmaps for the display specified by DPYINFO. */
void
x_destroy_all_bitmaps (Display_Info *dpyinfo)
{
ptrdiff_t i;
Bitmap_Record *bm = dpyinfo->bitmaps;
for (i = 0; i < dpyinfo->bitmaps_last; i++, bm++)
if (bm->refcount > 0)
free_bitmap_record (dpyinfo, bm);
dpyinfo->bitmaps_last = 0;
}
static bool x_create_x_image_and_pixmap (struct frame *, int, int, int,
XImagePtr *, Pixmap *);
static void x_destroy_x_image (XImagePtr ximg);
#ifdef HAVE_X_WINDOWS
/* Useful functions defined in the section
`Image type independent image structures' below. */
static unsigned long four_corners_best (XImagePtr ximg,
int *corners,
unsigned long width,
unsigned long height);
/* Create a mask of a bitmap. Note is this not a perfect mask.
It's nicer with some borders in this context */
void
x_create_bitmap_mask (struct frame *f, ptrdiff_t id)
{
Pixmap pixmap, mask;
XImagePtr ximg, mask_img;
unsigned long width, height;
bool result;
unsigned long bg;
unsigned long x, y, xp, xm, yp, ym;
GC gc;
Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
if (!(id > 0))
return;
pixmap = x_bitmap_pixmap (f, id);
width = x_bitmap_width (f, id);
height = x_bitmap_height (f, id);
block_input ();
ximg = XGetImage (FRAME_X_DISPLAY (f), pixmap, 0, 0, width, height,
~0, ZPixmap);
if (!ximg)
{
unblock_input ();
return;
}
result = x_create_x_image_and_pixmap (f, width, height, 1, &mask_img, &mask);
unblock_input ();
if (!result)
{
XDestroyImage (ximg);
return;
}
bg = four_corners_best (ximg, NULL, width, height);
for (y = 0; y < ximg->height; ++y)
{
for (x = 0; x < ximg->width; ++x)
{
xp = x != ximg->width - 1 ? x + 1 : 0;
xm = x != 0 ? x - 1 : ximg->width - 1;
yp = y != ximg->height - 1 ? y + 1 : 0;
ym = y != 0 ? y - 1 : ximg->height - 1;
if (XGetPixel (ximg, x, y) == bg
&& XGetPixel (ximg, x, yp) == bg
&& XGetPixel (ximg, x, ym) == bg
&& XGetPixel (ximg, xp, y) == bg
&& XGetPixel (ximg, xp, yp) == bg
&& XGetPixel (ximg, xp, ym) == bg
&& XGetPixel (ximg, xm, y) == bg
&& XGetPixel (ximg, xm, yp) == bg
&& XGetPixel (ximg, xm, ym) == bg)
XPutPixel (mask_img, x, y, 0);
else
XPutPixel (mask_img, x, y, 1);
}
}
eassert (input_blocked_p ());
gc = XCreateGC (FRAME_X_DISPLAY (f), mask, 0, NULL);
XPutImage (FRAME_X_DISPLAY (f), mask, gc, mask_img, 0, 0, 0, 0,
width, height);
XFreeGC (FRAME_X_DISPLAY (f), gc);
dpyinfo->bitmaps[id - 1].have_mask = 1;
dpyinfo->bitmaps[id - 1].mask = mask;
XDestroyImage (ximg);
x_destroy_x_image (mask_img);
}
#endif /* HAVE_X_WINDOWS */
/***********************************************************************
Image types
***********************************************************************/
/* List of supported image types. Use define_image_type to add new
types. Use lookup_image_type to find a type for a given symbol. */
static struct image_type *image_types;
/* The symbol `xbm' which is used as the type symbol for XBM images. */
static Lisp_Object Qxbm;
/* Keywords. */
Lisp_Object QCascent, QCmargin, QCrelief;
Lisp_Object QCconversion;
static Lisp_Object QCheuristic_mask;
static Lisp_Object QCcolor_symbols;
static Lisp_Object QCindex, QCmatrix, QCcolor_adjustment, QCmask, QCgeometry;
static Lisp_Object QCcrop, QCrotation;
/* Other symbols. */
static Lisp_Object Qcount, Qextension_data, Qdelay;
static Lisp_Object Qlaplace, Qemboss, Qedge_detection, Qheuristic;
/* Forward function prototypes. */
static struct image_type *lookup_image_type (Lisp_Object);
static void x_laplace (struct frame *, struct image *);
static void x_emboss (struct frame *, struct image *);
static void x_build_heuristic_mask (struct frame *, struct image *,
Lisp_Object);
#ifdef WINDOWSNT
extern Lisp_Object Vlibrary_cache;
#define CACHE_IMAGE_TYPE(type, status) \
do { Vlibrary_cache = Fcons (Fcons (type, status), Vlibrary_cache); } while (0)
#else
#define CACHE_IMAGE_TYPE(type, status)
#endif
#define ADD_IMAGE_TYPE(type) \
do { Vimage_types = Fcons (type, Vimage_types); } while (0)
/* Define a new image type from TYPE. This adds a copy of TYPE to
image_types and caches the loading status of TYPE. */
static struct image_type *
define_image_type (struct image_type *type)
{
struct image_type *p = NULL;
Lisp_Object target_type = *type->type;
bool type_valid = 1;
block_input ();
for (p = image_types; p; p = p->next)
if (EQ (*p->type, target_type))
goto done;
if (type->init)
{
#if defined HAVE_NTGUI && defined WINDOWSNT
/* If we failed to load the library before, don't try again. */
Lisp_Object tested = Fassq (target_type, Vlibrary_cache);
if (CONSP (tested) && NILP (XCDR (tested)))
type_valid = 0;
else
#endif
{
type_valid = type->init ();
CACHE_IMAGE_TYPE (target_type, type_valid ? Qt : Qnil);
}
}
if (type_valid)
{
/* Make a copy of TYPE to avoid a bus error in a dumped Emacs.
The initialized data segment is read-only. */
p = xmalloc (sizeof *p);
*p = *type;
p->next = image_types;
image_types = p;
}
done:
unblock_input ();
return p;
}
/* Value is true if OBJECT is a valid Lisp image specification. A
valid image specification is a list whose car is the symbol
`image', and whose rest is a property list. The property list must
contain a value for key `:type'. That value must be the name of a
supported image type. The rest of the property list depends on the
image type. */
bool
valid_image_p (Lisp_Object object)
{
bool valid_p = 0;
if (IMAGEP (object))
{
Lisp_Object tem;
for (tem = XCDR (object); CONSP (tem); tem = XCDR (tem))
if (EQ (XCAR (tem), QCtype))
{
tem = XCDR (tem);
if (CONSP (tem) && SYMBOLP (XCAR (tem)))
{
struct image_type *type;
type = lookup_image_type (XCAR (tem));
if (type)
valid_p = type->valid_p (object);
}
break;
}
}
return valid_p;
}
/* Log error message with format string FORMAT and argument ARG.
Signaling an error, e.g. when an image cannot be loaded, is not a
good idea because this would interrupt redisplay, and the error
message display would lead to another redisplay. This function
therefore simply displays a message. */
static void
image_error (const char *format, Lisp_Object arg1, Lisp_Object arg2)
{
add_to_log (format, arg1, arg2);
}
/***********************************************************************
Image specifications
***********************************************************************/
enum image_value_type
{
IMAGE_DONT_CHECK_VALUE_TYPE,
IMAGE_STRING_VALUE,
IMAGE_STRING_OR_NIL_VALUE,
IMAGE_SYMBOL_VALUE,
IMAGE_POSITIVE_INTEGER_VALUE,
IMAGE_NON_NEGATIVE_INTEGER_VALUE_OR_PAIR,
IMAGE_NON_NEGATIVE_INTEGER_VALUE,
IMAGE_ASCENT_VALUE,
IMAGE_INTEGER_VALUE,
IMAGE_FUNCTION_VALUE,
IMAGE_NUMBER_VALUE,
IMAGE_BOOL_VALUE
};
/* Structure used when parsing image specifications. */
struct image_keyword
{
/* Name of keyword. */
const char *name;
/* The type of value allowed. */
enum image_value_type type;
/* True means key must be present. */
bool mandatory_p;
/* Used to recognize duplicate keywords in a property list. */
int count;
/* The value that was found. */
Lisp_Object value;
};
/* Parse image spec SPEC according to KEYWORDS. A valid image spec
has the format (image KEYWORD VALUE ...). One of the keyword/
value pairs must be `:type TYPE'. KEYWORDS is a vector of
image_keywords structures of size NKEYWORDS describing other
allowed keyword/value pairs. Value is true if SPEC is valid. */
static bool
parse_image_spec (Lisp_Object spec, struct image_keyword *keywords,
int nkeywords, Lisp_Object type)
{
int i;
Lisp_Object plist;
if (!IMAGEP (spec))
return 0;
plist = XCDR (spec);
while (CONSP (plist))
{
Lisp_Object key, value;
/* First element of a pair must be a symbol. */
key = XCAR (plist);
plist = XCDR (plist);
if (!SYMBOLP (key))
return 0;
/* There must follow a value. */
if (!CONSP (plist))
return 0;
value = XCAR (plist);
plist = XCDR (plist);
/* Find key in KEYWORDS. Error if not found. */
for (i = 0; i < nkeywords; ++i)
if (strcmp (keywords[i].name, SSDATA (SYMBOL_NAME (key))) == 0)
break;
if (i == nkeywords)
continue;
/* Record that we recognized the keyword. If a keywords
was found more than once, it's an error. */
keywords[i].value = value;
if (keywords[i].count > 1)
return 0;
++keywords[i].count;
/* Check type of value against allowed type. */
switch (keywords[i].type)
{
case IMAGE_STRING_VALUE:
if (!STRINGP (value))
return 0;
break;
case IMAGE_STRING_OR_NIL_VALUE:
if (!STRINGP (value) && !NILP (value))
return 0;
break;
case IMAGE_SYMBOL_VALUE:
if (!SYMBOLP (value))
return 0;
break;
case IMAGE_POSITIVE_INTEGER_VALUE:
if (! RANGED_INTEGERP (1, value, INT_MAX))
return 0;
break;
case IMAGE_NON_NEGATIVE_INTEGER_VALUE_OR_PAIR:
if (RANGED_INTEGERP (0, value, INT_MAX))
break;
if (CONSP (value)
&& RANGED_INTEGERP (0, XCAR (value), INT_MAX)
&& RANGED_INTEGERP (0, XCDR (value), INT_MAX))
break;
return 0;
case IMAGE_ASCENT_VALUE:
if (SYMBOLP (value) && EQ (value, Qcenter))
break;
else if (RANGED_INTEGERP (0, value, 100))
break;
return 0;
case IMAGE_NON_NEGATIVE_INTEGER_VALUE:
/* Unlike the other integer-related cases, this one does not
verify that VALUE fits in 'int'. This is because callers
want EMACS_INT. */
if (!INTEGERP (value) || XINT (value) < 0)
return 0;
break;
case IMAGE_DONT_CHECK_VALUE_TYPE:
break;
case IMAGE_FUNCTION_VALUE:
value = indirect_function (value);
if (!NILP (Ffunctionp (value)))
break;
return 0;
case IMAGE_NUMBER_VALUE:
if (!INTEGERP (value) && !FLOATP (value))
return 0;
break;
case IMAGE_INTEGER_VALUE:
if (! TYPE_RANGED_INTEGERP (int, value))
return 0;
break;
case IMAGE_BOOL_VALUE:
if (!NILP (value) && !EQ (value, Qt))
return 0;
break;
default:
emacs_abort ();
break;
}
if (EQ (key, QCtype) && !EQ (type, value))
return 0;
}
/* Check that all mandatory fields are present. */
for (i = 0; i < nkeywords; ++i)
if (keywords[i].mandatory_p && keywords[i].count == 0)
return 0;
return NILP (plist);
}
/* Return the value of KEY in image specification SPEC. Value is nil