forked from jgmenu/jgmenu
-
Notifications
You must be signed in to change notification settings - Fork 0
/
xpm-loader.c
569 lines (500 loc) · 14.3 KB
/
xpm-loader.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
/* Based on gdk-pixbuf/io-xpm.c
* Copyright (C) 1999 Mark Crichton
* Copyright (C) 1999 The Free Software Foundation
*
* Authors: Mark Crichton <[email protected]>
* Federico Mena-Quintero <[email protected]>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "xpm-loader.h"
#include <assert.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <errno.h>
#ifndef MIN
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
#ifndef MAX
#define MAX(a, b) ((a) < (b) ? (b) : (a))
#endif
#ifndef G_N_ELEMENTS
#define G_N_ELEMENTS(arr) (sizeof(arr) / sizeof((arr)[0]))
#endif
enum buf_op { op_header, op_cmap, op_body };
struct xpm_color {
char *color_string;
u_int16_t red;
u_int16_t green;
u_int16_t blue;
int transparent;
};
struct file_handle {
FILE *infile;
char *buffer;
uint buffer_size;
};
struct mem_handle {
const char **data;
int offset;
};
/* The following 2 routines (parse_color, find_color) come from Tk, via the Win32
* port of GDK. The licensing terms on these (longer than the functions) is:
*
* This software is copyrighted by the Regents of the University of
* California, Sun Microsystems, Inc., and other parties. The following
* terms apply to all files associated with the software unless explicitly
* disclaimed in individual files.
*
* The authors hereby grant permission to use, copy, modify, distribute,
* and license this software and its documentation for any purpose, provided
* that existing copyright notices are retained in all copies and that this
* notice is included verbatim in any distributions. No written agreement,
* license, or royalty fee is required for any of the authorized uses.
* Modifications to this software may be copyrighted by their authors
* and need not follow the licensing terms described here, provided that
* the new terms are clearly indicated on the first page of each file where
* they apply.
*
* IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY
* FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY
* DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. THIS SOFTWARE
* IS PROVIDED ON AN "AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE
* NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
* MODIFICATIONS.
*
* GOVERNMENT USE: If you are acquiring this software on behalf of the
* U.S. government, the Government shall have only "Restricted Rights"
* in the software and related documentation as defined in the Federal
* Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you
* are acquiring the software on behalf of the Department of Defense, the
* software shall be classified as "Commercial Computer Software" and the
* Government shall have only "Restricted Rights" as defined in Clause
* 252.227-7013 (c) (1) of DFARs. Notwithstanding the foregoing, the
* authors grant the U.S. Government and others acting in its behalf
* permission to use and distribute the software in accordance with the
* terms specified in this license.
*/
#include "xpm-color-table.h"
/*
*----------------------------------------------------------------------
*
* find_color --
*
* This routine finds the color entry that corresponds to the
* specified color.
*
* Results:
* Returns non-zero on success. The RGB values of the XColor
* will be initialized to the proper values on success.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static int compare_xcolor_entries(const void *a, const void *b)
{
return strcasecmp((const char *)a, color_names + ((const struct xpm_color_entry *)b)->name_offset);
}
static int find_color(const char *name, struct xpm_color *color_ptr)
{
struct xpm_color_entry *found;
found = bsearch(name, xcolors, G_N_ELEMENTS(xcolors), sizeof(struct xpm_color_entry), compare_xcolor_entries);
if (!found)
return 0;
color_ptr->red = (found->red * 65535) / 255;
color_ptr->green = (found->green * 65535) / 255;
color_ptr->blue = (found->blue * 65535) / 255;
return 1;
}
/*
*----------------------------------------------------------------------
*
* parse_color --
*
* Partial implementation of X color name parsing interface.
*
* Results:
* Returns 1 on success.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static int parse_color(const char *spec, struct xpm_color *color_ptr)
{
if (spec[0] == '#') {
int i, red, green, blue;
i = strlen(spec + 1);
if (i % 3)
return 0;
i /= 3;
if (i == 4) {
if (sscanf(spec + 1, "%4x%4x%4x", &red, &green, &blue) != 3)
return 0;
color_ptr->red = red;
color_ptr->green = green;
color_ptr->blue = blue;
} else if (i == 1) {
if (sscanf(spec + 1, "%1x%1x%1x", &red, &green, &blue) != 3)
return 0;
color_ptr->red = (red * 65535) / 15;
color_ptr->green = (green * 65535) / 15;
color_ptr->blue = (blue * 65535) / 15;
} else if (i == 2) {
if (sscanf(spec + 1, "%2x%2x%2x", &red, &green, &blue) != 3)
return 0;
color_ptr->red = (red * 65535) / 255;
color_ptr->green = (green * 65535) / 255;
color_ptr->blue = (blue * 65535) / 255;
} else /* if (i == 3) */ {
if (sscanf(spec + 1, "%3x%3x%3x", &red, &green, &blue) != 3)
return 0;
color_ptr->red = (red * 65535) / 4095;
color_ptr->green = (green * 65535) / 4095;
color_ptr->blue = (blue * 65535) / 4095;
}
} else {
if (!find_color(spec, color_ptr))
return 0;
}
return 1;
}
static int xpm_seek_string(FILE *infile, const char *str)
{
char instr[1024];
while (!feof(infile)) {
if (fscanf(infile, "%1023s", instr) < 0)
return 0;
if (strcmp(instr, str) == 0)
return 1;
}
return 0;
}
static int xpm_seek_char(FILE *infile, char c)
{
int b, oldb;
while ((b = getc(infile)) != EOF) {
if (c != b && b == '/') {
b = getc(infile);
if (b == EOF) {
return 0;
} else if (b == '*') {
/* we have a comment */
b = -1;
do {
oldb = b;
b = getc(infile);
if (b == EOF)
return 0;
} while (!(oldb == '*' && b == '/'));
}
} else if (c == b) {
return 1;
}
}
return 0;
}
static int xpm_read_string(FILE *infile, char **buffer, uint *buffer_size)
{
int c;
uint cnt = 0, bufsiz, ret = 0;
char *buf;
buf = *buffer;
bufsiz = *buffer_size;
if (!buf) {
bufsiz = 10 * sizeof(char);
buf = (char *)calloc(bufsiz, sizeof(char));
}
do {
c = getc(infile);
} while (c != EOF && c != '"');
if (c != '"')
goto out;
while ((c = getc(infile)) != EOF) {
if (cnt == bufsiz) {
uint new_size = bufsiz * 2;
if (new_size > bufsiz)
bufsiz = new_size;
else
goto out;
buf = (char *)realloc(buf, bufsiz);
buf[bufsiz - 1] = '\0';
}
if (c != '"') {
buf[cnt++] = c;
} else {
buf[cnt] = 0;
ret = 1;
break;
}
}
out:
buf[bufsiz - 1] = '\0'; /* ensure null termination for errors */
*buffer = buf;
*buffer_size = bufsiz;
return ret;
}
/* Unlike the standard C library isspace() function, this only recognizes standard ASCII white-space
* and ignores the locale, returning FALSE for all non-ASCII characters.
* Also, unlike the standard library function, this takes a char, not an int,
* so don't call it on EOF, but no need to cast to unsigned char before passing a possibly non-ASCII character in.
* Similar to g_ascii_isspace.
*/
static int xpm_isspace(char c)
{
return c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v';
}
static char *xpm_extract_color(const char *buffer)
{
const char *p = &buffer[0];
int new_key = 0;
int key = 0;
int current_key = 1;
int space = 128;
char word[129], color[129], current_color[129];
char *r;
word[0] = '\0';
color[0] = '\0';
current_color[0] = '\0';
while (1) {
/* skip whitespace */
for (; *p != '\0' && xpm_isspace(*p); p++)
; /* nothing to do */
/* copy word */
for (r = word; *p != '\0' && !xpm_isspace(*p) && r - word < (int)sizeof(word) - 1; p++, r++)
*r = *p;
*r = '\0';
if (*word == '\0') {
if (color[0] == '\0') /* incomplete colormap entry */
return NULL;
/* end of entry, still store the last color */
new_key = 1;
} else if (key > 0 && color[0] == '\0') {
/* next word must be a color name part */
new_key = 0;
} else {
if (strcmp(word, "c") == 0)
new_key = 5;
else if (strcmp(word, "g") == 0)
new_key = 4;
else if (strcmp(word, "g4") == 0)
new_key = 3;
else if (strcmp(word, "m") == 0)
new_key = 2;
else if (strcmp(word, "s") == 0)
new_key = 1;
else
new_key = 0;
}
if (new_key == 0) { /* word is a color name part */
if (key == 0) /* key expected */
return NULL;
/* accumulate color name */
if (color[0] != '\0') {
strncat(color, " ", space);
space -= MIN(space, 1);
}
strncat(color, word, space);
space -= MIN(space, (int)strlen(word));
} else { /* word is a key */
if (key > current_key) {
current_key = key;
strcpy(current_color, color);
}
space = 128;
color[0] = '\0';
key = new_key;
if (*p == '\0')
break;
}
}
if (current_key > 1)
return strdup(current_color);
else
return NULL;
}
/* (almost) direct copy from gdkpixmap.c... loads an XPM from a file */
static const char *file_buffer(enum buf_op op, void *handle)
{
struct file_handle *h = (struct file_handle *)handle;
if (op == op_header) {
if (xpm_seek_string(h->infile, "XPM") != 1)
goto out;
if (xpm_seek_char(h->infile, '{') != 1)
goto out;
}
if (op == op_cmap || op == op_header) {
xpm_seek_char(h->infile, '"');
fseek(h->infile, -1, SEEK_CUR);
}
if (xpm_read_string(h->infile, &h->buffer, &h->buffer_size))
return h->buffer;
out:
return NULL;
}
static struct xpm_color *lookup_color(struct xpm_color *colors, int n_colors, const char *name)
{
int i;
for (i = 0; i < n_colors; i++) {
struct xpm_color *color = &colors[i];
if (strcmp(name, color->color_string) == 0)
return color;
}
return NULL;
}
/* This function does all the work. */
static u_int32_t *pixbuf_create_from_xpm(const char *(*get_buf)(enum buf_op op, void *handle),
void *handle,
int *width,
int *height)
{
int w, h, n_col, cpp, x_hot, y_hot, items;
int cnt, xcnt, ycnt, wbytes, n;
int is_trans = 0;
const char *buffer;
char *name_buf;
char pixel_str[32];
struct xpm_color *colors, *color, *fallbackcolor;
u_int32_t *data = NULL;
fallbackcolor = NULL;
buffer = (*get_buf)(op_header, handle);
if (!buffer)
return NULL;
items = sscanf(buffer, "%d %d %d %d %d %d", &w, &h, &n_col, &cpp, &x_hot, &y_hot);
if (items != 4 && items != 6)
return NULL;
if (w <= 0)
return NULL;
if (h <= 0)
return NULL;
if (cpp <= 0 || cpp >= 32)
return NULL;
if (n_col <= 0 || n_col >= INT_MAX / (cpp + 1) || n_col >= INT_MAX / (int)sizeof(struct xpm_color))
return NULL;
name_buf = (char *)calloc(n_col, cpp + 1);
if (!name_buf)
return NULL;
colors = (struct xpm_color *)calloc(n_col, sizeof(struct xpm_color));
if (!colors) {
free(name_buf);
return NULL;
}
for (cnt = 0; cnt < n_col; cnt++) {
char *color_name;
buffer = (*get_buf)(op_cmap, handle);
if (!buffer) {
free(colors);
free(name_buf);
return NULL;
}
color = &colors[cnt];
color->color_string = &name_buf[cnt * (cpp + 1)];
strncpy(color->color_string, buffer, cpp);
color->color_string[cpp] = 0;
buffer += strlen(color->color_string);
color->transparent = 0;
color_name = xpm_extract_color(buffer);
if (!color_name || (strcasecmp(color_name, "None") == 0) ||
(parse_color(color_name, color) == 0)) {
color->transparent = 1;
color->red = 0;
color->green = 0;
color->blue = 0;
is_trans = 1;
}
free(color_name);
if (cnt == 0)
fallbackcolor = color;
}
data = (u_int32_t *)calloc(w * h, sizeof(u_int32_t));
if (!data) {
free(colors);
free(name_buf);
return NULL;
}
wbytes = w * cpp;
for (ycnt = 0; ycnt < h; ycnt++) {
buffer = (*get_buf)(op_body, handle);
if ((!buffer) || ((int)strlen(buffer) < wbytes))
continue;
for (n = 0, xcnt = 0; n < wbytes; n += cpp, xcnt++) {
uint a, r, g, b;
strncpy(pixel_str, &buffer[n], cpp);
pixel_str[cpp] = 0;
color = lookup_color(colors, n_col, pixel_str);
/* Bad XPM...punt */
if (!color)
color = fallbackcolor;
a = 0xFF;
if (is_trans && color->transparent)
a = 0;
r = color->red >> 8;
g = color->green >> 8;
b = color->blue >> 8;
data[ycnt * w + xcnt] = (a << 24) | (r << 16) | (g << 8) | b;
}
}
free(colors);
free(name_buf);
*width = w;
*height = h;
return data;
}
cairo_surface_t *get_xpm_icon(const char *filename)
{
struct file_handle handle;
int w, h;
u_int32_t *data;
cairo_surface_t *surface;
unsigned char *surface_data;
memset(&h, 0, sizeof(h));
handle.infile = fopen(filename, "r");
if (!handle.infile) {
fprintf(stderr, "Failed to load XPM file: %s\n", filename);
return NULL;
}
handle.buffer_size = 4096;
handle.buffer = calloc(4096, 1);
data = pixbuf_create_from_xpm(file_buffer, &handle, &w, &h);
free(handle.buffer);
fclose(handle.infile);
if (!data) {
fprintf(stderr, "Failed to load XPM file: %s\n", filename);
return NULL;
}
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
if (!surface) {
fprintf(stderr, "Failed to load XPM file: %s\n", filename);
free(data);
return NULL;
}
surface_data = cairo_image_surface_get_data(surface);
cairo_surface_flush(surface);
memcpy(surface_data, data, w * h * 4);
free(data);
cairo_surface_mark_dirty(surface);
return surface;
}