File: | image/xcb_image.c |
Location: | line 591, column 16 |
Description: | The left operand of '&' is a garbage value |
1 | /* Copyright © 2007 Bart Massey | |||
2 | * | |||
3 | * Permission is hereby granted, free of charge, to any person obtaining a | |||
4 | * copy of this software and associated documentation files (the "Software"), | |||
5 | * to deal in the Software without restriction, including without limitation | |||
6 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |||
7 | * and/or sell copies of the Software, and to permit persons to whom the | |||
8 | * Software is furnished to do so, subject to the following conditions: | |||
9 | * | |||
10 | * The above copyright notice and this permission notice shall be included in | |||
11 | * all copies or substantial portions of the Software. | |||
12 | * | |||
13 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |||
14 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |||
15 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |||
16 | * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |||
17 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |||
18 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |||
19 | * | |||
20 | * Except as contained in this notice, the names of the authors or their | |||
21 | * institutions shall not be used in advertising or otherwise to promote the | |||
22 | * sale, use or other dealings in this Software without prior written | |||
23 | * authorization from the authors. | |||
24 | */ | |||
25 | ||||
26 | #ifdef HAVE_CONFIG_H1 | |||
27 | #include "config.h" | |||
28 | #endif | |||
29 | ||||
30 | #include <stdlib.h> | |||
31 | #include <stdio.h> | |||
32 | #include <string.h> | |||
33 | ||||
34 | #include <xcb/xcb.h> | |||
35 | #include <xcb/shm.h> | |||
36 | #include <xcb/xcb_aux.h> | |||
37 | #include "xcb_bitops.h" | |||
38 | #include "xcb_image.h" | |||
39 | #define BUILD | |||
40 | #include "xcb_pixel.h" | |||
41 | ||||
42 | ||||
43 | static xcb_format_t * | |||
44 | find_format_by_depth (const xcb_setup_t *setup, uint8_t depth) | |||
45 | { | |||
46 | xcb_format_t *fmt = xcb_setup_pixmap_formats(setup); | |||
47 | xcb_format_t *fmtend = fmt + xcb_setup_pixmap_formats_length(setup); | |||
48 | for(; fmt != fmtend; ++fmt) | |||
49 | if(fmt->depth == depth) | |||
50 | return fmt; | |||
51 | return 0; | |||
52 | } | |||
53 | ||||
54 | ||||
55 | static xcb_image_format_t | |||
56 | effective_format(xcb_image_format_t format, uint8_t bpp) | |||
57 | { | |||
58 | if (format == XCB_IMAGE_FORMAT_Z_PIXMAP && bpp != 1) | |||
59 | return format; | |||
60 | return XCB_IMAGE_FORMAT_XY_PIXMAP; | |||
61 | } | |||
62 | ||||
63 | ||||
64 | static int | |||
65 | format_valid (uint8_t depth, uint8_t bpp, uint8_t unit, | |||
66 | xcb_image_format_t format, uint8_t xpad) | |||
67 | { | |||
68 | xcb_image_format_t ef = effective_format(format, bpp); | |||
69 | if (depth > bpp) | |||
70 | return 0; | |||
71 | switch(ef) { | |||
72 | case XCB_IMAGE_FORMAT_XY_PIXMAP: | |||
73 | switch(unit) { | |||
74 | case 8: | |||
75 | case 16: | |||
76 | case 32: | |||
77 | break; | |||
78 | default: | |||
79 | return 0; | |||
80 | } | |||
81 | if (xpad < bpp) | |||
82 | return 0; | |||
83 | switch (xpad) { | |||
84 | case 8: | |||
85 | case 16: | |||
86 | case 32: | |||
87 | break; | |||
88 | default: | |||
89 | return 0; | |||
90 | } | |||
91 | break; | |||
92 | case XCB_IMAGE_FORMAT_Z_PIXMAP: | |||
93 | switch (bpp) { | |||
94 | case 4: | |||
95 | if (unit != 8) | |||
96 | return 0; | |||
97 | break; | |||
98 | case 8: | |||
99 | case 16: | |||
100 | case 24: | |||
101 | case 32: | |||
102 | if (unit != bpp) | |||
103 | return 0; | |||
104 | break; | |||
105 | default: | |||
106 | return 0; | |||
107 | } | |||
108 | break; | |||
109 | default: | |||
110 | return 0; | |||
111 | } | |||
112 | return 1; | |||
113 | } | |||
114 | ||||
115 | ||||
116 | static int | |||
117 | image_format_valid (xcb_image_t *image) { | |||
118 | return format_valid(image->depth, | |||
119 | image->bpp, | |||
120 | image->unit, | |||
121 | image->format, | |||
122 | image->scanline_pad); | |||
123 | } | |||
124 | ||||
125 | ||||
126 | void | |||
127 | xcb_image_annotate (xcb_image_t *image) | |||
128 | { | |||
129 | xcb_image_format_t ef = effective_format(image->format, image->bpp); | |||
130 | switch (ef) { | |||
131 | case XCB_IMAGE_FORMAT_XY_PIXMAP: | |||
132 | image->stride = xcb_roundup(image->width, image->scanline_pad) >> 3; | |||
133 | image->size = image->height * image->stride * image->depth; | |||
134 | break; | |||
135 | case XCB_IMAGE_FORMAT_Z_PIXMAP: | |||
136 | image->stride = xcb_roundup((uint32_t)image->width * | |||
137 | (uint32_t)image->bpp, | |||
138 | image->scanline_pad) >> 3; | |||
139 | image->size = image->height * image->stride; | |||
140 | break; | |||
141 | default: | |||
142 | assert(0)(__builtin_expect(!(0), 0) ? __assert_rtn(__func__, "xcb_image.c" , 142, "0") : (void)0); | |||
143 | } | |||
144 | } | |||
145 | ||||
146 | ||||
147 | xcb_image_t * | |||
148 | xcb_image_create_native (xcb_connection_t * c, | |||
149 | uint16_t width, | |||
150 | uint16_t height, | |||
151 | xcb_image_format_t format, | |||
152 | uint8_t depth, | |||
153 | void * base, | |||
154 | uint32_t bytes, | |||
155 | uint8_t * data) | |||
156 | { | |||
157 | const xcb_setup_t * setup = xcb_get_setup(c); | |||
158 | xcb_format_t * fmt; | |||
159 | xcb_image_format_t ef = format; | |||
160 | ||||
161 | if (ef == XCB_IMAGE_FORMAT_Z_PIXMAP && depth == 1) | |||
162 | ef = XCB_IMAGE_FORMAT_XY_PIXMAP; | |||
163 | switch (ef) { | |||
164 | case XCB_IMAGE_FORMAT_XY_BITMAP: | |||
165 | if (depth != 1) | |||
166 | return 0; | |||
167 | /* fall through */ | |||
168 | case XCB_IMAGE_FORMAT_XY_PIXMAP: | |||
169 | if (depth > 1) { | |||
170 | fmt = find_format_by_depth(setup, depth); | |||
171 | if (!fmt) | |||
172 | return 0; | |||
173 | } | |||
174 | return xcb_image_create(width, height, format, | |||
175 | setup->bitmap_format_scanline_pad, | |||
176 | depth, depth, setup->bitmap_format_scanline_unit, | |||
177 | setup->image_byte_order, | |||
178 | setup->bitmap_format_bit_order, | |||
179 | base, bytes, data); | |||
180 | case XCB_IMAGE_FORMAT_Z_PIXMAP: | |||
181 | fmt = find_format_by_depth(setup, depth); | |||
182 | if (!fmt) | |||
183 | return 0; | |||
184 | return xcb_image_create(width, height, format, | |||
185 | fmt->scanline_pad, | |||
186 | fmt->depth, fmt->bits_per_pixel, 0, | |||
187 | setup->image_byte_order, | |||
188 | XCB_IMAGE_ORDER_MSB_FIRST, | |||
189 | base, bytes, data); | |||
190 | default: | |||
191 | assert(0)(__builtin_expect(!(0), 0) ? __assert_rtn(__func__, "xcb_image.c" , 191, "0") : (void)0); | |||
192 | } | |||
193 | assert(0)(__builtin_expect(!(0), 0) ? __assert_rtn(__func__, "xcb_image.c" , 193, "0") : (void)0); | |||
194 | return NULL((void *)0); | |||
195 | } | |||
196 | ||||
197 | ||||
198 | xcb_image_t * | |||
199 | xcb_image_create (uint16_t width, | |||
200 | uint16_t height, | |||
201 | xcb_image_format_t format, | |||
202 | uint8_t xpad, | |||
203 | uint8_t depth, | |||
204 | uint8_t bpp, | |||
205 | uint8_t unit, | |||
206 | xcb_image_order_t byte_order, | |||
207 | xcb_image_order_t bit_order, | |||
208 | void * base, | |||
209 | uint32_t bytes, | |||
210 | uint8_t * data) | |||
211 | { | |||
212 | xcb_image_t * image; | |||
213 | ||||
214 | if (unit == 0) { | |||
215 | switch (format) { | |||
216 | case XCB_IMAGE_FORMAT_XY_BITMAP: | |||
217 | case XCB_IMAGE_FORMAT_XY_PIXMAP: | |||
218 | unit = 32; | |||
219 | break; | |||
220 | case XCB_IMAGE_FORMAT_Z_PIXMAP: | |||
221 | if (bpp == 1) { | |||
222 | unit = 32; | |||
223 | break; | |||
224 | } | |||
225 | if (bpp < 8) { | |||
226 | unit = 8; | |||
227 | break; | |||
228 | } | |||
229 | unit = bpp; | |||
230 | break; | |||
231 | } | |||
232 | } | |||
233 | if (!format_valid(depth, bpp, unit, format, xpad)) | |||
234 | return 0; | |||
235 | image = malloc(sizeof(*image)); | |||
236 | if (image == 0) | |||
237 | return 0; | |||
238 | image->width = width; | |||
239 | image->height = height; | |||
240 | image->format = format; | |||
241 | image->scanline_pad = xpad; | |||
242 | image->depth = depth; | |||
243 | image->bpp = bpp; | |||
244 | image->unit = unit; | |||
245 | image->plane_mask = xcb_mask(depth); | |||
246 | image->byte_order = byte_order; | |||
247 | image->bit_order = bit_order; | |||
248 | xcb_image_annotate(image); | |||
249 | ||||
250 | /* | |||
251 | * Ways this function can be called: | |||
252 | * * with data: we fail if bytes isn't | |||
253 | * large enough, else leave well enough alone. | |||
254 | * * with base and !data: if bytes is zero, we | |||
255 | * default; otherwise we fail if bytes isn't | |||
256 | * large enough, else fill in data | |||
257 | * * with !base and !data: we malloc storage | |||
258 | * for the data, save that address as the base, | |||
259 | * and fail if malloc does. | |||
260 | * | |||
261 | * When successful, we establish the invariant that data | |||
262 | * points at sufficient storage that may have been | |||
263 | * supplied, and base is set iff it should be | |||
264 | * auto-freed when the image is destroyed. | |||
265 | * | |||
266 | * Except as a special case when base = 0 && data == 0 && | |||
267 | * bytes == ~0 we just return the image structure and let | |||
268 | * the caller deal with getting the allocation right. | |||
269 | */ | |||
270 | if (!base && !data && bytes == ~0) { | |||
271 | image->base = 0; | |||
272 | image->data = 0; | |||
273 | return image; | |||
274 | } | |||
275 | if (!base && data && bytes == 0) | |||
276 | bytes = image->size; | |||
277 | image->base = base; | |||
278 | image->data = data; | |||
279 | if (!image->data) { | |||
280 | if (image->base) { | |||
281 | image->data = image->base; | |||
282 | } else { | |||
283 | bytes = image->size; | |||
284 | image->base = malloc(bytes); | |||
285 | image->data = image->base; | |||
286 | } | |||
287 | } | |||
288 | if (!image->data || bytes < image->size) { | |||
289 | free(image); | |||
290 | return 0; | |||
291 | } | |||
292 | return image; | |||
293 | } | |||
294 | ||||
295 | ||||
296 | void | |||
297 | xcb_image_destroy (xcb_image_t *image) | |||
298 | { | |||
299 | if (image->base) | |||
300 | free (image->base); | |||
301 | free (image); | |||
302 | } | |||
303 | ||||
304 | ||||
305 | xcb_image_t * | |||
306 | xcb_image_get (xcb_connection_t * conn, | |||
307 | xcb_drawable_t draw, | |||
308 | int16_t x, | |||
309 | int16_t y, | |||
310 | uint16_t width, | |||
311 | uint16_t height, | |||
312 | uint32_t plane_mask, | |||
313 | xcb_image_format_t format) | |||
314 | { | |||
315 | xcb_get_image_cookie_t image_cookie; | |||
316 | xcb_get_image_reply_t * imrep; | |||
317 | xcb_image_t * image = 0; | |||
318 | uint32_t bytes; | |||
319 | uint8_t * data; | |||
320 | ||||
321 | image_cookie = xcb_get_image(conn, format, draw, x, y, | |||
322 | width, height, plane_mask); | |||
323 | imrep = xcb_get_image_reply(conn, image_cookie, 0); | |||
324 | if (!imrep) | |||
325 | return 0; | |||
326 | bytes = xcb_get_image_data_length(imrep); | |||
327 | data = xcb_get_image_data(imrep); | |||
328 | switch (format) { | |||
329 | case XCB_IMAGE_FORMAT_XY_PIXMAP: | |||
330 | plane_mask &= xcb_mask(imrep->depth); | |||
331 | if (plane_mask != xcb_mask(imrep->depth)) { | |||
332 | int i; | |||
333 | uint32_t rpm = plane_mask; | |||
334 | uint32_t size; | |||
335 | uint8_t *src_plane = data; | |||
336 | uint8_t *dst_plane; | |||
337 | ||||
338 | image = xcb_image_create_native(conn, width, height, format, | |||
339 | imrep->depth, 0, 0, 0); | |||
340 | if (!image) { | |||
341 | free(imrep); | |||
342 | return 0; | |||
343 | } | |||
344 | image->plane_mask = plane_mask; | |||
345 | size = image->height * image->stride; | |||
346 | dst_plane = image->data; | |||
347 | for (i = imrep->depth - 1; i >= 0; --i) { | |||
348 | if (rpm & (1 << i)) { | |||
349 | memcpy(dst_plane, src_plane, size)__builtin___memcpy_chk (dst_plane, src_plane, size, __builtin_object_size (dst_plane, 0)); | |||
350 | src_plane += size; | |||
351 | } else { | |||
352 | memset(dst_plane, 0, size)__builtin___memset_chk (dst_plane, 0, size, __builtin_object_size (dst_plane, 0)); | |||
353 | } | |||
354 | dst_plane += size; | |||
355 | } | |||
356 | free(imrep); | |||
357 | break; | |||
358 | } | |||
359 | /* fall through */ | |||
360 | case XCB_IMAGE_FORMAT_Z_PIXMAP: | |||
361 | image = xcb_image_create_native(conn, width, height, format, | |||
362 | imrep->depth, imrep, bytes, data); | |||
363 | if (!image) { | |||
364 | free(imrep); | |||
365 | return 0; | |||
366 | } | |||
367 | assert(bytes == image->size)(__builtin_expect(!(bytes == image->size), 0) ? __assert_rtn (__func__, "xcb_image.c", 367, "bytes == image->size") : ( void)0); | |||
368 | break; | |||
369 | default: | |||
370 | assert(0)(__builtin_expect(!(0), 0) ? __assert_rtn(__func__, "xcb_image.c" , 370, "0") : (void)0); | |||
371 | } | |||
372 | return image; | |||
373 | } | |||
374 | ||||
375 | ||||
376 | xcb_image_t * | |||
377 | xcb_image_native (xcb_connection_t * c, | |||
378 | xcb_image_t * image, | |||
379 | int convert) | |||
380 | { | |||
381 | xcb_image_t * tmp_image = 0; | |||
382 | const xcb_setup_t * setup = xcb_get_setup(c); | |||
383 | xcb_format_t * fmt = 0; | |||
384 | xcb_image_format_t ef = effective_format(image->format, image->bpp); | |||
385 | uint8_t bpp = 1; | |||
386 | ||||
387 | if (image->depth > 1 || ef == XCB_IMAGE_FORMAT_Z_PIXMAP) { | |||
388 | fmt = find_format_by_depth(setup, image->depth); | |||
389 | /* XXX For now, we don't do depth conversions, even | |||
390 | for xy-pixmaps */ | |||
391 | if (!fmt) | |||
392 | return 0; | |||
393 | bpp = fmt->bits_per_pixel; | |||
394 | } | |||
395 | switch (ef) { | |||
396 | case XCB_IMAGE_FORMAT_XY_PIXMAP: | |||
397 | if (setup->bitmap_format_scanline_unit != image->unit || | |||
398 | setup->bitmap_format_scanline_pad != image->scanline_pad || | |||
399 | setup->image_byte_order != image->byte_order || | |||
400 | setup->bitmap_format_bit_order != image->bit_order || | |||
401 | bpp != image->bpp) { | |||
402 | if (!convert) | |||
403 | return 0; | |||
404 | tmp_image = | |||
405 | xcb_image_create(image->width, image->height, image->format, | |||
406 | setup->bitmap_format_scanline_pad, | |||
407 | image->depth, bpp, | |||
408 | setup->bitmap_format_scanline_unit, | |||
409 | setup->image_byte_order, | |||
410 | setup->bitmap_format_bit_order, | |||
411 | 0, 0, 0); | |||
412 | if (!tmp_image) | |||
413 | return 0; | |||
414 | } | |||
415 | break; | |||
416 | case XCB_IMAGE_FORMAT_Z_PIXMAP: | |||
417 | if (fmt->scanline_pad != image->scanline_pad || | |||
418 | setup->image_byte_order != image->byte_order || | |||
419 | bpp != image->bpp) { | |||
420 | if (!convert) | |||
421 | return 0; | |||
422 | tmp_image = | |||
423 | xcb_image_create(image->width, image->height, image->format, | |||
424 | fmt->scanline_pad, | |||
425 | image->depth, bpp, 0, | |||
426 | setup->image_byte_order, | |||
427 | XCB_IMAGE_ORDER_MSB_FIRST, | |||
428 | 0, 0, 0); | |||
429 | if (!tmp_image) | |||
430 | return 0; | |||
431 | } | |||
432 | break; | |||
433 | default: | |||
434 | assert(0)(__builtin_expect(!(0), 0) ? __assert_rtn(__func__, "xcb_image.c" , 434, "0") : (void)0); | |||
435 | } | |||
436 | if (tmp_image) { | |||
437 | if (!xcb_image_convert(image, tmp_image)) { | |||
438 | xcb_image_destroy(tmp_image); | |||
439 | return 0; | |||
440 | } | |||
441 | image = tmp_image; | |||
442 | } | |||
443 | return image; | |||
444 | } | |||
445 | ||||
446 | ||||
447 | xcb_void_cookie_t | |||
448 | xcb_image_put (xcb_connection_t * conn, | |||
449 | xcb_drawable_t draw, | |||
450 | xcb_gcontext_t gc, | |||
451 | xcb_image_t * image, | |||
452 | int16_t x, | |||
453 | int16_t y, | |||
454 | uint8_t left_pad) | |||
455 | { | |||
456 | return xcb_put_image(conn, image->format, draw, gc, | |||
457 | image->width, image->height, | |||
458 | x, y, left_pad, | |||
459 | image->depth, | |||
460 | image->size, | |||
461 | image->data); | |||
462 | } | |||
463 | ||||
464 | ||||
465 | ||||
466 | /* | |||
467 | * Shm stuff | |||
468 | */ | |||
469 | ||||
470 | xcb_image_t * | |||
471 | xcb_image_shm_put (xcb_connection_t * conn, | |||
472 | xcb_drawable_t draw, | |||
473 | xcb_gcontext_t gc, | |||
474 | xcb_image_t * image, | |||
475 | xcb_shm_segment_info_t shminfo, | |||
476 | int16_t src_x, | |||
477 | int16_t src_y, | |||
478 | int16_t dest_x, | |||
479 | int16_t dest_y, | |||
480 | uint16_t src_width, | |||
481 | uint16_t src_height, | |||
482 | uint8_t send_event) | |||
483 | { | |||
484 | if (!xcb_image_native(conn, image, 0)) | |||
485 | return 0; | |||
486 | if (!shminfo.shmaddr) | |||
487 | return 0; | |||
488 | xcb_shm_put_image(conn, draw, gc, | |||
489 | image->width, image->height, | |||
490 | src_x, src_y, src_width, src_height, | |||
491 | dest_x, dest_y, | |||
492 | image->depth, image->format, | |||
493 | send_event, | |||
494 | shminfo.shmseg, | |||
495 | image->data - shminfo.shmaddr); | |||
496 | return image; | |||
497 | } | |||
498 | ||||
499 | ||||
500 | int | |||
501 | xcb_image_shm_get (xcb_connection_t * conn, | |||
502 | xcb_drawable_t draw, | |||
503 | xcb_image_t * image, | |||
504 | xcb_shm_segment_info_t shminfo, | |||
505 | int16_t x, | |||
506 | int16_t y, | |||
507 | uint32_t plane_mask) | |||
508 | { | |||
509 | xcb_shm_get_image_reply_t * setup; | |||
510 | xcb_shm_get_image_cookie_t cookie; | |||
511 | xcb_generic_error_t * err = 0; | |||
512 | ||||
513 | if (!shminfo.shmaddr) | |||
514 | return 0; | |||
515 | cookie = xcb_shm_get_image(conn, draw, | |||
516 | x, y, | |||
517 | image->width, image->height, | |||
518 | plane_mask, | |||
519 | image->format, | |||
520 | shminfo.shmseg, | |||
521 | image->data - shminfo.shmaddr); | |||
522 | setup = xcb_shm_get_image_reply(conn, cookie, &err); | |||
523 | if (err) { | |||
524 | fprintf(stderr__stderrp, "ShmGetImageReply error %d\n", (int)err->error_code); | |||
525 | free(err); | |||
526 | return 0; | |||
527 | } else { | |||
528 | free (setup); | |||
529 | return 1; | |||
530 | } | |||
531 | } | |||
532 | ||||
533 | ||||
534 | static uint32_t | |||
535 | xy_image_byte (xcb_image_t *image, uint32_t x) | |||
536 | { | |||
537 | x >>= 3; | |||
538 | if (image->byte_order == image->bit_order) | |||
539 | return x; | |||
540 | switch (image->unit) { | |||
541 | default: | |||
542 | case 8: | |||
543 | return x; | |||
544 | case 16: | |||
545 | return x ^ 1; | |||
546 | case 32: | |||
547 | return x ^ 3; | |||
548 | } | |||
549 | } | |||
550 | ||||
551 | static uint32_t | |||
552 | xy_image_bit (xcb_image_t *image, uint32_t x) | |||
553 | { | |||
554 | x &= 7; | |||
555 | if (image->bit_order == XCB_IMAGE_ORDER_MSB_FIRST) | |||
556 | x = 7 - x; | |||
557 | return x; | |||
558 | } | |||
559 | ||||
560 | /* GetPixel/PutPixel */ | |||
561 | ||||
562 | /* XXX this is the most hideously done cut-and-paste | |||
563 | to below. Any bugs fixed there should be fixed here | |||
564 | and vice versa. */ | |||
565 | void | |||
566 | xcb_image_put_pixel (xcb_image_t *image, | |||
567 | uint32_t x, | |||
568 | uint32_t y, | |||
569 | uint32_t pixel) | |||
570 | { | |||
571 | uint8_t *row; | |||
572 | ||||
573 | if (x > image->width || y > image->height) | |||
574 | return; | |||
575 | row = image->data + (y * image->stride); | |||
576 | switch (effective_format(image->format, image->bpp)) { | |||
577 | case XCB_IMAGE_FORMAT_XY_BITMAP: | |||
578 | case XCB_IMAGE_FORMAT_XY_PIXMAP: | |||
579 | /* block */ { | |||
580 | int p; | |||
581 | uint32_t plane_mask = image->plane_mask; | |||
582 | uint8_t * plane = row; | |||
583 | uint32_t byte = xy_image_byte(image, x); | |||
584 | uint32_t bit = xy_image_bit(image,x); | |||
585 | uint8_t mask = 1 << bit; | |||
586 | ||||
587 | for (p = image->bpp - 1; p >= 0; p--) { | |||
588 | if ((plane_mask >> p) & 1) { | |||
589 | uint8_t * bp = plane + byte; | |||
590 | uint8_t this_bit = ((pixel >> p) & 1) << bit; | |||
591 | *bp = (*bp & ~mask) | this_bit; | |||
| ||||
592 | } | |||
593 | plane += image->stride * image->height; | |||
594 | } | |||
595 | } | |||
596 | break; | |||
597 | case XCB_IMAGE_FORMAT_Z_PIXMAP: | |||
598 | switch (image->bpp) { | |||
599 | uint32_t mask; | |||
600 | case 4: | |||
601 | mask = 0xf; | |||
602 | pixel &= 0xf; | |||
603 | if ((x & 1) == | |||
604 | (image->byte_order == XCB_IMAGE_ORDER_MSB_FIRST)) { | |||
605 | pixel <<= 4; | |||
606 | mask <<= 4; | |||
607 | } | |||
608 | row[x >> 1] = (row[x >> 1] & ~mask) | pixel; | |||
609 | break; | |||
610 | case 8: | |||
611 | row[x] = pixel; | |||
612 | break; | |||
613 | case 16: | |||
614 | switch (image->byte_order) { | |||
615 | case XCB_IMAGE_ORDER_LSB_FIRST: | |||
616 | row[x << 1] = pixel; | |||
617 | row[(x << 1) + 1] = pixel >> 8; | |||
618 | break; | |||
619 | case XCB_IMAGE_ORDER_MSB_FIRST: | |||
620 | row[x << 1] = pixel >> 8; | |||
621 | row[(x << 1) + 1] = pixel; | |||
622 | break; | |||
623 | } | |||
624 | break; | |||
625 | case 24: | |||
626 | switch (image->byte_order) { | |||
627 | case XCB_IMAGE_ORDER_LSB_FIRST: | |||
628 | row[x * 3] = pixel; | |||
629 | row[x * 3 + 1] = pixel >> 8; | |||
630 | row[x * 3 + 2] = pixel >> 16; | |||
631 | break; | |||
632 | case XCB_IMAGE_ORDER_MSB_FIRST: | |||
633 | row[x * 3] = pixel >> 16; | |||
634 | row[x * 3 + 1] = pixel >> 8; | |||
635 | row[x * 3 + 2] = pixel; | |||
636 | break; | |||
637 | } | |||
638 | break; | |||
639 | case 32: | |||
640 | switch (image->byte_order) { | |||
641 | case XCB_IMAGE_ORDER_LSB_FIRST: | |||
642 | row[x << 2] = pixel; | |||
643 | row[(x << 2) + 1] = pixel >> 8; | |||
644 | row[(x << 2) + 2] = pixel >> 16; | |||
645 | row[(x << 2) + 3] = pixel >> 24; | |||
646 | break; | |||
647 | case XCB_IMAGE_ORDER_MSB_FIRST: | |||
648 | row[x << 2] = pixel >> 24; | |||
649 | row[(x << 2) + 1] = pixel >> 16; | |||
650 | row[(x << 2) + 2] = pixel >> 8; | |||
651 | row[(x << 2) + 3] = pixel; | |||
652 | break; | |||
653 | } | |||
654 | break; | |||
655 | default: | |||
656 | assert(0)(__builtin_expect(!(0), 0) ? __assert_rtn(__func__, "xcb_image.c" , 656, "0") : (void)0); | |||
657 | } | |||
658 | break; | |||
659 | default: | |||
660 | assert(0)(__builtin_expect(!(0), 0) ? __assert_rtn(__func__, "xcb_image.c" , 660, "0") : (void)0); | |||
661 | } | |||
662 | } | |||
663 | ||||
664 | ||||
665 | /* XXX this is the most hideously done cut-and-paste | |||
666 | from above. Any bugs fixed there should be fixed here | |||
667 | and vice versa. */ | |||
668 | uint32_t | |||
669 | xcb_image_get_pixel (xcb_image_t *image, | |||
670 | uint32_t x, | |||
671 | uint32_t y) | |||
672 | { | |||
673 | uint32_t pixel = 0; | |||
674 | uint8_t *row; | |||
675 | ||||
676 | assert(x < image->width && y < image->height)(__builtin_expect(!(x < image->width && y < image ->height), 0) ? __assert_rtn(__func__, "xcb_image.c", 676, "x < image->width && y < image->height") : (void)0); | |||
677 | row = image->data + (y * image->stride); | |||
678 | switch (effective_format(image->format, image->bpp)) { | |||
679 | case XCB_IMAGE_FORMAT_XY_BITMAP: | |||
680 | case XCB_IMAGE_FORMAT_XY_PIXMAP: | |||
681 | /* block */ { | |||
682 | int p; | |||
683 | uint32_t plane_mask = image->plane_mask; | |||
684 | uint8_t * plane = row; | |||
685 | uint32_t byte = xy_image_byte(image, x); | |||
686 | uint32_t bit = xy_image_bit(image,x); | |||
687 | ||||
688 | for (p = image->bpp - 1; p >= 0; p--) { | |||
689 | pixel <<= 1; | |||
690 | if ((plane_mask >> p) & 1) { | |||
691 | uint8_t * bp = plane + byte; | |||
692 | pixel |= (*bp >> bit) & 1; | |||
693 | } | |||
694 | plane += image->stride * image->height; | |||
695 | } | |||
696 | } | |||
697 | return pixel; | |||
698 | case XCB_IMAGE_FORMAT_Z_PIXMAP: | |||
699 | switch (image->bpp) { | |||
700 | case 4: | |||
701 | if ((x & 1) == (image->byte_order == XCB_IMAGE_ORDER_MSB_FIRST)) | |||
702 | return row[x >> 1] >> 4; | |||
703 | return row[x >> 1] & 0xf; | |||
704 | case 8: | |||
705 | return row[x]; | |||
706 | case 16: | |||
707 | switch (image->byte_order) { | |||
708 | case XCB_IMAGE_ORDER_LSB_FIRST: | |||
709 | pixel = row[x << 1]; | |||
710 | pixel |= row[(x << 1) + 1] << 8; | |||
711 | break; | |||
712 | case XCB_IMAGE_ORDER_MSB_FIRST: | |||
713 | pixel = row[x << 1] << 8; | |||
714 | pixel |= row[(x << 1) + 1]; | |||
715 | break; | |||
716 | } | |||
717 | break; | |||
718 | case 24: | |||
719 | switch (image->byte_order) { | |||
720 | case XCB_IMAGE_ORDER_LSB_FIRST: | |||
721 | pixel = row[x * 3]; | |||
722 | pixel |= row[x * 3 + 1] << 8; | |||
723 | pixel |= row[x * 3 + 2] << 16; | |||
724 | break; | |||
725 | case XCB_IMAGE_ORDER_MSB_FIRST: | |||
726 | pixel = row[x * 3] << 16; | |||
727 | pixel |= row[x * 3 + 1] << 8; | |||
728 | pixel |= row[x * 3 + 2]; | |||
729 | break; | |||
730 | } | |||
731 | break; | |||
732 | case 32: | |||
733 | switch (image->byte_order) { | |||
734 | case XCB_IMAGE_ORDER_LSB_FIRST: | |||
735 | pixel = row[x << 2]; | |||
736 | pixel |= row[(x << 2) + 1] << 8; | |||
737 | pixel |= row[(x << 2) + 2] << 16; | |||
738 | pixel |= row[(x << 2) + 3] << 24; | |||
739 | break; | |||
740 | case XCB_IMAGE_ORDER_MSB_FIRST: | |||
741 | pixel = row[x << 2] << 24; | |||
742 | pixel |= row[(x << 2) + 1] << 16; | |||
743 | pixel |= row[(x << 2) + 2] << 8; | |||
744 | pixel |= row[(x << 2) + 3]; | |||
745 | break; | |||
746 | } | |||
747 | break; | |||
748 | default: | |||
749 | assert(0)(__builtin_expect(!(0), 0) ? __assert_rtn(__func__, "xcb_image.c" , 749, "0") : (void)0); | |||
750 | } | |||
751 | return pixel; | |||
752 | default: | |||
753 | assert(0)(__builtin_expect(!(0), 0) ? __assert_rtn(__func__, "xcb_image.c" , 753, "0") : (void)0); | |||
754 | } | |||
755 | return 0; | |||
756 | } | |||
757 | ||||
758 | ||||
759 | xcb_image_t * | |||
760 | xcb_image_create_from_bitmap_data (uint8_t * data, | |||
761 | uint32_t width, | |||
762 | uint32_t height) | |||
763 | { | |||
764 | return xcb_image_create(width, height, XCB_IMAGE_FORMAT_XY_PIXMAP, | |||
765 | 8, 1, 1, 8, | |||
766 | XCB_IMAGE_ORDER_LSB_FIRST, | |||
767 | XCB_IMAGE_ORDER_LSB_FIRST, | |||
768 | 0, 0, data); | |||
769 | } | |||
770 | ||||
771 | ||||
772 | /* | |||
773 | * (Adapted from libX11.) | |||
774 | * | |||
775 | * xcb_create_pixmap_from_bitmap_data: Routine to make a pixmap of | |||
776 | * given depth from user supplied bitmap data. | |||
777 | * D is any drawable on the same screen that the pixmap will be used in. | |||
778 | * Data is a pointer to the bit data, and | |||
779 | * width & height give the size in bits of the pixmap. | |||
780 | * | |||
781 | * The following format is assumed for data: | |||
782 | * | |||
783 | * format=XY (will use XYPixmap for depth 1 and XYBitmap for larger) | |||
784 | * bit_order=LSBFirst | |||
785 | * padding=8 | |||
786 | * bitmap_unit=8 | |||
787 | */ | |||
788 | xcb_pixmap_t | |||
789 | xcb_create_pixmap_from_bitmap_data (xcb_connection_t * display, | |||
790 | xcb_drawable_t d, | |||
791 | uint8_t * data, | |||
792 | uint32_t width, | |||
793 | uint32_t height, | |||
794 | uint32_t depth, | |||
795 | uint32_t fg, | |||
796 | uint32_t bg, | |||
797 | xcb_gcontext_t * gcp) | |||
798 | { | |||
799 | xcb_pixmap_t pix; | |||
800 | xcb_image_t * image; | |||
801 | xcb_image_t * final_image; | |||
802 | xcb_gcontext_t gc; | |||
803 | uint32_t mask = 0; | |||
804 | xcb_params_gc_t gcv; | |||
805 | ||||
806 | image = xcb_image_create_from_bitmap_data(data, width, height); | |||
807 | if (!image) | |||
808 | return 0; | |||
809 | if (depth > 1) | |||
810 | image->format = XCB_IMAGE_FORMAT_XY_BITMAP; | |||
811 | final_image = xcb_image_native(display, image, 1); | |||
812 | if (!final_image) { | |||
813 | xcb_image_destroy(image); | |||
814 | return 0; | |||
815 | } | |||
816 | pix = xcb_generate_id(display); | |||
817 | xcb_create_pixmap(display, depth, pix, d, width, height); | |||
818 | gc = xcb_generate_id(display); | |||
819 | XCB_AUX_ADD_PARAM(&mask, &gcv, foreground, fg)((*(&mask)|=1<<((uint32_t const*)(&(((&gcv) )->foreground))-(uint32_t const*)((&gcv)))), ((&gcv )->foreground=(fg))); | |||
820 | XCB_AUX_ADD_PARAM(&mask, &gcv, background, bg)((*(&mask)|=1<<((uint32_t const*)(&(((&gcv) )->background))-(uint32_t const*)((&gcv)))), ((&gcv )->background=(bg))); | |||
821 | xcb_aux_create_gc(display, gc, pix, mask, &gcv); | |||
822 | xcb_image_put(display, pix, gc, final_image, 0, 0, 0); | |||
823 | if (final_image != image) | |||
824 | xcb_image_destroy(final_image); | |||
825 | xcb_image_destroy(image); | |||
826 | if (gcp) | |||
827 | *gcp = gc; | |||
828 | else | |||
829 | xcb_free_gc(display, gc); | |||
830 | return pix; | |||
831 | } | |||
832 | ||||
833 | ||||
834 | /* Thanks to Keith Packard <keithp@keithp.com> for this code */ | |||
835 | static void | |||
836 | swap_image(uint8_t * src, | |||
837 | uint32_t src_stride, | |||
838 | uint8_t * dst, | |||
839 | uint32_t dst_stride, | |||
840 | uint32_t height, | |||
841 | uint32_t byteswap, | |||
842 | int bitswap, | |||
843 | int nibbleswap) | |||
844 | { | |||
845 | while (height--) { | |||
846 | uint32_t s; | |||
847 | ||||
848 | for (s = 0; s < src_stride; s++) { | |||
849 | uint8_t b; | |||
850 | uint32_t d = s ^ byteswap; | |||
851 | ||||
852 | if (d > dst_stride) | |||
853 | continue; | |||
854 | ||||
855 | b = src[s]; | |||
856 | if (bitswap) | |||
857 | b = xcb_bit_reverse(b, 8); | |||
858 | if (nibbleswap) | |||
859 | b = (b << 4) | (b >> 4); | |||
860 | dst[d] = b; | |||
861 | } | |||
862 | src += src_stride; | |||
863 | dst += dst_stride; | |||
864 | } | |||
865 | } | |||
866 | ||||
867 | /* Which order are bytes in (low two bits), given | |||
868 | * code which accesses an image one byte at a time | |||
869 | */ | |||
870 | static uint32_t | |||
871 | byte_order(xcb_image_t *i) | |||
872 | { | |||
873 | uint32_t flip = i->byte_order == XCB_IMAGE_ORDER_MSB_FIRST; | |||
874 | ||||
875 | switch (i->bpp) { | |||
876 | default: | |||
877 | case 8: | |||
878 | return 0; | |||
879 | case 16: | |||
880 | return flip; | |||
881 | case 32: | |||
882 | return flip | (flip << 1); | |||
883 | } | |||
884 | } | |||
885 | ||||
886 | static uint32_t | |||
887 | bit_order(xcb_image_t *i) | |||
888 | { | |||
889 | uint32_t flip = i->byte_order != i->bit_order; | |||
890 | ||||
891 | switch (i->unit) { | |||
892 | default: | |||
893 | case 8: | |||
894 | return 0; | |||
895 | case 16: | |||
896 | return flip; | |||
897 | case 32: | |||
898 | return flip | (flip << 1); | |||
899 | } | |||
900 | } | |||
901 | ||||
902 | /* Convert from one byte order to another by flipping the | |||
903 | * low two bits of the byte index along a scanline | |||
904 | */ | |||
905 | static uint32_t | |||
906 | conversion_byte_swap(xcb_image_t *src, xcb_image_t *dst) | |||
907 | { | |||
908 | xcb_image_format_t ef = effective_format(src->format, src->bpp); | |||
909 | ||||
910 | /* src_ef == dst_ef in all callers of this function */ | |||
911 | if (ef == XCB_IMAGE_FORMAT_XY_PIXMAP) { | |||
912 | return bit_order(src) ^ bit_order(dst); | |||
913 | } else { | |||
914 | /* src_bpp == dst_bpp in all callers of this function */ | |||
915 | return byte_order(src) ^ byte_order(dst); | |||
916 | } | |||
917 | } | |||
918 | ||||
919 | xcb_image_t * | |||
920 | xcb_image_convert (xcb_image_t * src, | |||
921 | xcb_image_t * dst) | |||
922 | { | |||
923 | xcb_image_format_t ef = effective_format(src->format, src->bpp); | |||
924 | ||||
925 | /* Things will go horribly wrong here if a bad | |||
926 | image is passed in, so we check some things | |||
927 | up front just to be nice. */ | |||
928 | assert(image_format_valid(src))(__builtin_expect(!(image_format_valid(src)), 0) ? __assert_rtn (__func__, "xcb_image.c", 928, "image_format_valid(src)") : ( void)0); | |||
929 | assert(image_format_valid(dst))(__builtin_expect(!(image_format_valid(dst)), 0) ? __assert_rtn (__func__, "xcb_image.c", 929, "image_format_valid(dst)") : ( void)0); | |||
930 | ||||
931 | /* images must be the same size | |||
932 | * (yes, we could copy a sub-set) | |||
933 | */ | |||
934 | if (src->width != dst->width || | |||
935 | src->height != dst->height) | |||
936 | return 0; | |||
937 | ||||
938 | if (ef == effective_format(dst->format, dst->bpp) && | |||
939 | src->bpp == dst->bpp) | |||
940 | { | |||
941 | if (src->unit == dst->unit && | |||
942 | src->scanline_pad == dst->scanline_pad && | |||
943 | src->byte_order == dst->byte_order && | |||
944 | (ef == XCB_IMAGE_FORMAT_Z_PIXMAP || | |||
945 | src->bit_order == dst->bit_order)) { | |||
946 | memcpy(dst->data, src->data, src->size)__builtin___memcpy_chk (dst->data, src->data, src->size , __builtin_object_size (dst->data, 0)); | |||
947 | } else { | |||
948 | int bitswap = 0; | |||
949 | int nibbleswap = 0; | |||
950 | uint32_t byteswap = conversion_byte_swap(src, dst); | |||
951 | uint32_t height = src->height;; | |||
952 | ||||
953 | if (ef == XCB_IMAGE_FORMAT_Z_PIXMAP) { | |||
954 | if (src->bpp == 4 && src->byte_order != dst->byte_order) | |||
955 | nibbleswap = 1; | |||
956 | } else { | |||
957 | if (src->bit_order != dst->bit_order) | |||
958 | bitswap = 1; | |||
959 | height *= src->depth; | |||
960 | } | |||
961 | swap_image (src->data, src->stride, dst->data, dst->stride, | |||
962 | height, byteswap, bitswap, nibbleswap); | |||
963 | } | |||
964 | } | |||
965 | else | |||
966 | { | |||
967 | uint32_t x; | |||
968 | uint32_t y; | |||
969 | /* General case: Slow pixel copy. Should we optimize | |||
970 | Z24<->Z32 copies of either endianness? */ | |||
971 | for (y = 0; y < src->height; y++) { | |||
972 | for (x = 0; x < src->width; x++) { | |||
973 | uint32_t pixel = xcb_image_get_pixel(src, x, y); | |||
974 | xcb_image_put_pixel(dst, x, y, pixel); | |||
975 | } | |||
976 | } | |||
977 | } | |||
978 | return dst; | |||
979 | } | |||
980 | ||||
981 | xcb_image_t * | |||
982 | xcb_image_subimage(xcb_image_t * image, | |||
983 | uint32_t x, | |||
984 | uint32_t y, | |||
985 | uint32_t width, | |||
986 | uint32_t height, | |||
987 | void * base, | |||
988 | uint32_t bytes, | |||
989 | uint8_t * data) | |||
990 | { | |||
991 | int i, j; | |||
992 | xcb_image_t * result; | |||
993 | ||||
994 | if (x + width > image->width) | |||
| ||||
995 | return 0; | |||
996 | if (y + height > image->height) | |||
997 | return 0; | |||
998 | result = xcb_image_create(width, height, image->format, | |||
999 | image->scanline_pad, image->depth, | |||
1000 | image->bpp, image->unit, image->byte_order, | |||
1001 | image->bit_order, | |||
1002 | base, bytes, data); | |||
1003 | if (!result) | |||
1004 | return 0; | |||
1005 | /* XXX FIXME For now, lose on performance. Sorry. */ | |||
1006 | for (j = 0; j < height; j++) { | |||
1007 | for (i = 0; i < width; i++) { | |||
1008 | uint32_t pixel = xcb_image_get_pixel(image, x + i, y + j); | |||
1009 | xcb_image_put_pixel(result, i, j, pixel); | |||
1010 | } | |||
1011 | } | |||
1012 | return result; | |||
1013 | } |