pixman/pixman-image.c

   1 /*
   2  * Copyright © 2000 SuSE, Inc.
   3  * Copyright © 2007 Red Hat, Inc.
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and its
   6  * documentation for any purpose is hereby granted without fee, provided that
   7  * the above copyright notice appear in all copies and that both that
   8  * copyright notice and this permission notice appear in supporting
   9  * documentation, and that the name of SuSE not be used in advertising or
  10  * publicity pertaining to distribution of the software without specific,
  11  * written prior permission.  SuSE makes no representations about the
  12  * suitability of this software for any purpose.  It is provided "as is"
  13  * without express or implied warranty.
  14  *
  15  * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
  17  * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  18  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  19  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  20  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stdlib.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30
  31 #include "pixman-private.h"
  32
  33 #define Alpha(x) ((x) >> 24)
  34
  35 pixman_bool_t
  36 _pixman_init_gradient (gradient_t     *gradient,
  37                        const pixman_gradient_stop_t *stops,
  38                        int             n_stops)
  39 {
  40     return_val_if_fail (n_stops > 0, FALSE);
  41
  42     gradient->stops = pixman_malloc_ab (n_stops, sizeof (pixman_gradient_stop_t));
  43     if (!gradient->stops)
  44         return FALSE;
  45
  46     memcpy (gradient->stops, stops, n_stops * sizeof (pixman_gradient_stop_t));
  47
  48     gradient->n_stops = n_stops;
  49
  50     gradient->stop_range = 0xffff;
  51     gradient->color_table = NULL;
  52     gradient->color_table_size = 0;
  53     gradient->common.class = SOURCE_IMAGE_CLASS_UNKNOWN;
  54
  55     return TRUE;
  56 }
  57
  58 pixman_image_t *
  59 _pixman_image_allocate (void)
  60 {
  61     pixman_image_t *image = malloc (sizeof (pixman_image_t));
  62
  63     if (image)
  64     {
  65         image_common_t *common = &image->common;
  66
  67         pixman_region32_init (&common->full_region);
  68         pixman_region32_init (&common->clip_region);
  69         common->src_clip = &common->full_region;
  70         common->has_client_clip = FALSE;
  71         common->transform = NULL;
  72         common->repeat = PIXMAN_REPEAT_NONE;
  73         common->filter = PIXMAN_FILTER_NEAREST;
  74         common->filter_params = NULL;
  75         common->n_filter_params = 0;
  76         common->alpha_map = NULL;
  77         common->component_alpha = FALSE;
  78         common->ref_count = 1;
  79         common->read_func = NULL;
  80         common->write_func = NULL;
  81         common->classify = NULL;
  82     }
  83
  84     return image;
  85 }
  86
  87 source_pict_class_t
  88 _pixman_image_classify (pixman_image_t *image,
  89                         int             x,
  90                         int             y,
  91                         int             width,
  92                         int             height)
  93 {
  94     if (image->common.classify)
  95         return image->common.classify (image, x, y, width, height);
  96     else
  97         return SOURCE_IMAGE_CLASS_UNKNOWN;
  98 }
  99
 100 #define READ_ACCESS(f) ((image->common.read_func)? f##_accessors : f)
 101
 102 static void fbFetchSolid(bits_image_t * image, int x, int y, int width, uint32_t *buffer, uint32_t *mask, uint32_t maskBits)
 103 {
 104     uint32_t color;
 105     uint32_t *end;
 106     fetchPixelProc32 fetch = READ_ACCESS(pixman_fetchPixelProcForPicture32)(image);
 107
 108     color = fetch(image, 0, 0);
 109
 110     end = buffer + width;
 111     while (buffer < end)
 112         *(buffer++) = color;
 113 }
 114
 115 static void fbFetchSolid64(bits_image_t * image, int x, int y, int width, uint64_t *buffer, void *unused, uint32_t unused2)
 116 {
 117     uint64_t color;
 118     uint64_t *end;
 119     fetchPixelProc64 fetch = READ_ACCESS(pixman_fetchPixelProcForPicture64)(image);
 120
 121     color = fetch(image, 0, 0);
 122
 123     end = buffer + width;
 124     while (buffer < end)
 125         *(buffer++) = color;
 126 }
 127
 128 static void fbFetch(bits_image_t * image, int x, int y, int width, uint32_t *buffer, uint32_t *mask, uint32_t maskBits)
 129 {
 130     fetchProc32 fetch = READ_ACCESS(pixman_fetchProcForPicture32)(image);
 131
 132     fetch(image, x, y, width, buffer);
 133 }
 134
 135 static void fbFetch64(bits_image_t * image, int x, int y, int width, uint64_t *buffer, void *unused, uint32_t unused2)
 136 {
 137     fetchProc64 fetch = READ_ACCESS(pixman_fetchProcForPicture64)(image);
 138
 139     fetch(image, x, y, width, buffer);
 140 }
 141
 142 scanFetchProc
 143 _pixman_image_get_fetcher (pixman_image_t *image,
 144                            int             wide)
 145 {
 146     if (IS_SOURCE_IMAGE (image))
 147     {
 148         if (wide)
 149             return (scanFetchProc)pixmanFetchSourcePict64;
 150         else
 151             return (scanFetchProc)pixmanFetchSourcePict;
 152     }
 153     else
 154     {
 155         bits_image_t *bits = (bits_image_t *)image;
 156
 157         if (bits->common.alpha_map)
 158         {
 159             if (wide)
 160                 return (scanFetchProc)READ_ACCESS(fbFetchExternalAlpha64);
 161             else
 162                 return (scanFetchProc)READ_ACCESS(fbFetchExternalAlpha);
 163         }
 164         else if ((bits->common.repeat != PIXMAN_REPEAT_NONE) &&
 165                  bits->width == 1 &&
 166                  bits->height == 1)
 167         {
 168             if (wide)
 169                 return (scanFetchProc)fbFetchSolid64;
 170             else
 171                 return (scanFetchProc)fbFetchSolid;
 172         }
 173         else if (!bits->common.transform && bits->common.filter != PIXMAN_FILTER_CONVOLUTION
 174                 && bits->common.repeat != PIXMAN_REPEAT_PAD && bits->common.repeat != PIXMAN_REPEAT_REFLECT)
 175         {
 176             if (wide)
 177                 return (scanFetchProc)fbFetch64;
 178             else
 179                 return (scanFetchProc)fbFetch;
 180         }
 181         else
 182         {
 183             if (wide)
 184                 return (scanFetchProc)READ_ACCESS(fbFetchTransformed64);
 185             else
 186                 return (scanFetchProc)READ_ACCESS(fbFetchTransformed);
 187         }
 188     }
 189 }
 190
 191
 192
 193 #define WRITE_ACCESS(f) ((image->common.write_func)? f##_accessors : f)
 194
 195 static void
 196 fbStore(bits_image_t * image, int x, int y, int width, uint32_t *buffer)
 197 {
 198     uint32_t *bits;
 199     int32_t stride;
 200     storeProc32 store = WRITE_ACCESS(pixman_storeProcForPicture32)(image);
 201     const pixman_indexed_t * indexed = image->indexed;
 202
 203     bits = image->bits;
 204     stride = image->rowstride;
 205     bits += y*stride;
 206     store((pixman_image_t *)image, bits, buffer, x, width, indexed);
 207 }
 208
 209 static void
 210 fbStore64(bits_image_t * image, int x, int y, int width, uint64_t *buffer)
 211 {
 212     uint32_t *bits;
 213     int32_t stride;
 214     storeProc64 store = WRITE_ACCESS(pixman_storeProcForPicture64)(image);
 215     const pixman_indexed_t * indexed = image->indexed;
 216
 217     bits = image->bits;
 218     stride = image->rowstride;
 219     bits += y*stride;
 220     store((pixman_image_t *)image, bits, buffer, x, width, indexed);
 221 }
 222
 223 scanStoreProc
 224 _pixman_image_get_storer (pixman_image_t *image,
 225                           int             wide)
 226 {
 227     if (image->common.alpha_map)
 228     {
 229         if (wide)
 230             return (scanStoreProc)WRITE_ACCESS(fbStoreExternalAlpha64);
 231         else
 232             return (scanStoreProc)WRITE_ACCESS(fbStoreExternalAlpha);
 233     }
 234     else
 235     {
 236         if (wide)
 237             return (scanStoreProc)fbStore64;
 238         else
 239             return (scanStoreProc)fbStore;
 240     }
 241 }
 242
 243 /* Ref Counting */
 244 PIXMAN_EXPORT pixman_image_t *
 245 pixman_image_ref (pixman_image_t *image)
 246 {
 247     image->common.ref_count++;
 248
 249     return image;
 250 }
 251
 252 /* returns TRUE when the image is freed */
 253 PIXMAN_EXPORT pixman_bool_t
 254 pixman_image_unref (pixman_image_t *image)
 255 {
 256     image_common_t *common = (image_common_t *)image;
 257
 258     common->ref_count--;
 259
 260     if (common->ref_count == 0)
 261     {
 262         pixman_region32_fini (&common->clip_region);
 263         pixman_region32_fini (&common->full_region);
 264
 265         if (common->transform)
 266             free (common->transform);
 267
 268         if (common->filter_params)
 269             free (common->filter_params);
 270
 271         if (common->alpha_map)
 272             pixman_image_unref ((pixman_image_t *)common->alpha_map);
 273
 274 #if 0
 275         if (image->type == BITS && image->bits.indexed)
 276             free (image->bits.indexed);
 277 #endif
 278
 279 #if 0
 280         memset (image, 0xaa, sizeof (pixman_image_t));
 281 #endif
 282         if (image->type == LINEAR || image->type == RADIAL || image->type == CONICAL)
 283         {
 284             if (image->gradient.stops)
 285                 free (image->gradient.stops);
 286         }
 287
 288
 289         if (image->type == BITS && image->bits.free_me)
 290             free (image->bits.free_me);
 291
 292         free (image);
 293
 294         return TRUE;
 295     }
 296
 297     return FALSE;
 298 }
 299
 300 /* Constructors */
 301
 302 PIXMAN_EXPORT pixman_image_t *
 303 pixman_image_create_radial_gradient (pixman_point_fixed_t         *inner,
 304                                      pixman_point_fixed_t         *outer,
 305                                      pixman_fixed_t                inner_radius,
 306                                      pixman_fixed_t                outer_radius,
 307                                      const pixman_gradient_stop_t *stops,
 308                                      int                           n_stops)
 309 {
 310     pixman_image_t *image;
 311     radial_gradient_t *radial;
 312
 313     return_val_if_fail (n_stops >= 2, NULL);
 314
 315     image = _pixman_image_allocate();
 316
 317     if (!image)
 318         return NULL;
 319
 320     radial = &image->radial;
 321
 322     if (!_pixman_init_gradient (&radial->common, stops, n_stops))
 323     {
 324         free (image);
 325         return NULL;
 326     }
 327
 328     image->type = RADIAL;
 329
 330     radial->c1.x = inner->x;
 331     radial->c1.y = inner->y;
 332     radial->c1.radius = inner_radius;
 333     radial->c2.x = outer->x;
 334     radial->c2.y = outer->y;
 335     radial->c2.radius = outer_radius;
 336     radial->cdx = pixman_fixed_to_double (radial->c2.x - radial->c1.x);
 337     radial->cdy = pixman_fixed_to_double (radial->c2.y - radial->c1.y);
 338     radial->dr = pixman_fixed_to_double (radial->c2.radius - radial->c1.radius);
 339     radial->A = (radial->cdx * radial->cdx
 340                  + radial->cdy * radial->cdy
 341                  - radial->dr  * radial->dr);
 342
 343     return image;
 344 }
 345
 346 PIXMAN_EXPORT pixman_image_t *
 347 pixman_image_create_conical_gradient (pixman_point_fixed_t *center,
 348                                       pixman_fixed_t angle,
 349                                       const pixman_gradient_stop_t *stops,
 350                                       int n_stops)
 351 {
 352     pixman_image_t *image = _pixman_image_allocate();
 353     conical_gradient_t *conical;
 354
 355     if (!image)
 356         return NULL;
 357
 358     conical = &image->conical;
 359
 360     if (!_pixman_init_gradient (&conical->common, stops, n_stops))
 361     {
 362         free (image);
 363         return NULL;
 364     }
 365
 366     image->type = CONICAL;
 367     conical->center = *center;
 368     conical->angle = angle;
 369
 370     return image;
 371 }
 372
 373 static uint32_t *
 374 create_bits (pixman_format_code_t format,
 375              int                  width,
 376              int                  height,
 377              int                 *rowstride_bytes)
 378 {
 379     int stride;
 380     int buf_size;
 381     int bpp;
 382
 383     /* what follows is a long-winded way, avoiding any possibility of integer
 384      * overflows, of saying:
 385      * stride = ((width * bpp + FB_MASK) >> FB_SHIFT) * sizeof (uint32_t);
 386      */
 387
 388     bpp = PIXMAN_FORMAT_BPP (format);
 389     if (pixman_multiply_overflows_int (width, bpp))
 390         return NULL;
 391
 392     stride = width * bpp;
 393     if (pixman_addition_overflows_int (stride, FB_MASK))
 394         return NULL;
 395
 396     stride += FB_MASK;
 397     stride >>= FB_SHIFT;
 398
 399 #if FB_SHIFT < 2
 400     if (pixman_multiply_overflows_int (stride, sizeof (uint32_t)))
 401         return NULL;
 402 #endif
 403     stride *= sizeof (uint32_t);
 404
 405     if (pixman_multiply_overflows_int (height, stride))
 406         return NULL;
 407
 408     buf_size = height * stride;
 409
 410     if (rowstride_bytes)
 411         *rowstride_bytes = stride;
 412
 413     return calloc (buf_size, 1);
 414 }
 415
 416 static void
 417 reset_clip_region (pixman_image_t *image)
 418 {
 419     pixman_region32_fini (&image->common.clip_region);
 420
 421     if (image->type == BITS)
 422     {
 423         pixman_region32_init_rect (&image->common.clip_region, 0, 0,
 424                                    image->bits.width, image->bits.height);
 425     }
 426     else
 427     {
 428         pixman_region32_init (&image->common.clip_region);
 429     }
 430 }
 431
 432 PIXMAN_EXPORT pixman_image_t *
 433 pixman_image_create_bits (pixman_format_code_t  format,
 434                           int                   width,
 435                           int                   height,
 436                           uint32_t             *bits,
 437                           int                   rowstride_bytes)
 438 {
 439     pixman_image_t *image;
 440     uint32_t *free_me = NULL;
 441
 442     /* must be a whole number of uint32_t's
 443      */
 444     return_val_if_fail (bits == NULL ||
 445                         (rowstride_bytes % sizeof (uint32_t)) == 0, NULL);
 446
 447     if (!bits && width && height)
 448     {
 449         free_me = bits = create_bits (format, width, height, &rowstride_bytes);
 450         if (!bits)
 451             return NULL;
 452     }
 453
 454     image = _pixman_image_allocate();
 455
 456     if (!image) {
 457         if (free_me)
 458             free (free_me);
 459         return NULL;
 460     }
 461
 462     image->type = BITS;
 463     image->bits.format = format;
 464     image->bits.width = width;
 465     image->bits.height = height;
 466     image->bits.bits = bits;
 467     image->bits.free_me = free_me;
 468
 469     image->bits.rowstride = rowstride_bytes / (int) sizeof (uint32_t); /* we store it in number
 470                                                                   * of uint32_t's
 471                                                                   */
 472     image->bits.indexed = NULL;
 473
 474     pixman_region32_fini (&image->common.full_region);
 475     pixman_region32_init_rect (&image->common.full_region, 0, 0,
 476                                image->bits.width, image->bits.height);
 477
 478     reset_clip_region (image);
 479     return image;
 480 }
 481
 482 PIXMAN_EXPORT pixman_bool_t
 483 pixman_image_set_clip_region32 (pixman_image_t *image,
 484                                 pixman_region32_t *region)
 485 {
 486     image_common_t *common = (image_common_t *)image;
 487
 488     if (region)
 489     {
 490         return pixman_region32_copy (&common->clip_region, region);
 491     }
 492     else
 493     {
 494         reset_clip_region (image);
 495
 496         return TRUE;
 497     }
 498 }
 499
 500
 501 PIXMAN_EXPORT pixman_bool_t
 502 pixman_image_set_clip_region (pixman_image_t    *image,
 503                               pixman_region16_t *region)
 504 {
 505     image_common_t *common = (image_common_t *)image;
 506
 507     if (region)
 508     {
 509         return pixman_region32_copy_from_region16 (&common->clip_region, region);
 510     }
 511     else
 512     {
 513         reset_clip_region (image);
 514
 515         return TRUE;
 516     }
 517 }
 518
 519 /* Sets whether the clip region includes a clip region set by the client
 520  */
 521 PIXMAN_EXPORT void
 522 pixman_image_set_has_client_clip (pixman_image_t *image,
 523                                   pixman_bool_t   client_clip)
 524 {
 525     image->common.has_client_clip = client_clip;
 526 }
 527
 528 PIXMAN_EXPORT pixman_bool_t
 529 pixman_image_set_transform (pixman_image_t           *image,
 530                             const pixman_transform_t *transform)
 531 {
 532     static const pixman_transform_t id =
 533     {
 534         { { pixman_fixed_1, 0, 0 },
 535           { 0, pixman_fixed_1, 0 },
 536           { 0, 0, pixman_fixed_1 }
 537         }
 538     };
 539
 540     image_common_t *common = (image_common_t *)image;
 541
 542     if (common->transform == transform)
 543         return TRUE;
 544
 545     if (memcmp (&id, transform, sizeof (pixman_transform_t)) == 0)
 546     {
 547         free(common->transform);
 548         common->transform = NULL;
 549         return TRUE;
 550     }
 551
 552     if (common->transform == NULL)
 553         common->transform = malloc (sizeof (pixman_transform_t));
 554     if (common->transform == NULL)
 555         return FALSE;
 556
 557     memcpy(common->transform, transform, sizeof(pixman_transform_t));
 558
 559     return TRUE;
 560 }
 561
 562 PIXMAN_EXPORT void
 563 pixman_image_set_repeat (pixman_image_t  *image,
 564                          pixman_repeat_t  repeat)
 565 {
 566     image->common.repeat = repeat;
 567 }
 568
 569 PIXMAN_EXPORT pixman_bool_t
 570 pixman_image_set_filter (pixman_image_t       *image,
 571                          pixman_filter_t       filter,
 572                          const pixman_fixed_t *params,
 573                          int                   n_params)
 574 {
 575     image_common_t *common = (image_common_t *)image;
 576     pixman_fixed_t *new_params;
 577
 578     if (params == common->filter_params && filter == common->filter)
 579         return TRUE;
 580
 581     new_params = NULL;
 582     if (params)
 583     {
 584         new_params = pixman_malloc_ab (n_params, sizeof (pixman_fixed_t));
 585         if (!new_params)
 586             return FALSE;
 587
 588         memcpy (new_params,
 589                 params, n_params * sizeof (pixman_fixed_t));
 590     }
 591
 592     common->filter = filter;
 593
 594     if (common->filter_params)
 595         free (common->filter_params);
 596
 597     common->filter_params = new_params;
 598     common->n_filter_params = n_params;
 599     return TRUE;
 600 }
 601
 602 PIXMAN_EXPORT void
 603 pixman_image_set_source_clipping (pixman_image_t  *image,
 604                                   pixman_bool_t    source_clipping)
 605 {
 606     image_common_t *common = &image->common;
 607
 608     if (source_clipping)
 609         common->src_clip = &common->clip_region;
 610     else
 611         common->src_clip = &common->full_region;
 612 }
 613
 614 /* Unlike all the other property setters, this function does not
 615  * copy the content of indexed. Doing this copying is simply
 616  * way, way too expensive.
 617  */
 618 PIXMAN_EXPORT void
 619 pixman_image_set_indexed (pixman_image_t         *image,
 620                           const pixman_indexed_t *indexed)
 621 {
 622     bits_image_t *bits = (bits_image_t *)image;
 623
 624     bits->indexed = indexed;
 625 }
 626
 627 PIXMAN_EXPORT void
 628 pixman_image_set_alpha_map (pixman_image_t *image,
 629                             pixman_image_t *alpha_map,
 630                             int16_t         x,
 631                             int16_t         y)
 632 {
 633     image_common_t *common = (image_common_t *)image;
 634
 635     return_if_fail (!alpha_map || alpha_map->type == BITS);
 636
 637     if (common->alpha_map != (bits_image_t *)alpha_map)
 638     {
 639         if (common->alpha_map)
 640             pixman_image_unref ((pixman_image_t *)common->alpha_map);
 641
 642         if (alpha_map)
 643             common->alpha_map = (bits_image_t *)pixman_image_ref (alpha_map);
 644         else
 645             common->alpha_map = NULL;
 646     }
 647
 648     common->alpha_origin.x = x;
 649     common->alpha_origin.y = y;
 650 }
 651
 652 PIXMAN_EXPORT void
 653 pixman_image_set_component_alpha   (pixman_image_t       *image,
 654                                     pixman_bool_t         component_alpha)
 655 {
 656     image->common.component_alpha = component_alpha;
 657 }
 658
 659
 660 PIXMAN_EXPORT void
 661 pixman_image_set_accessors (pixman_image_t             *image,
 662                             pixman_read_memory_func_t   read_func,
 663                             pixman_write_memory_func_t  write_func)
 664 {
 665     return_if_fail (image != NULL);
 666
 667     image->common.read_func = read_func;
 668     image->common.write_func = write_func;
 669 }
 670
 671 PIXMAN_EXPORT uint32_t *
 672 pixman_image_get_data (pixman_image_t *image)
 673 {
 674     if (image->type == BITS)
 675         return image->bits.bits;
 676
 677     return NULL;
 678 }
 679
 680 PIXMAN_EXPORT int
 681 pixman_image_get_width (pixman_image_t *image)
 682 {
 683     if (image->type == BITS)
 684         return image->bits.width;
 685
 686     return 0;
 687 }
 688
 689 PIXMAN_EXPORT int
 690 pixman_image_get_height (pixman_image_t *image)
 691 {
 692     if (image->type == BITS)
 693         return image->bits.height;
 694
 695     return 0;
 696 }
 697
 698 PIXMAN_EXPORT int
 699 pixman_image_get_stride (pixman_image_t *image)
 700 {
 701     if (image->type == BITS)
 702         return image->bits.rowstride * (int) sizeof (uint32_t);
 703
 704     return 0;
 705 }
 706
 707 PIXMAN_EXPORT int
 708 pixman_image_get_depth (pixman_image_t *image)
 709 {
 710     if (image->type == BITS)
 711         return PIXMAN_FORMAT_DEPTH (image->bits.format);
 712
 713     return 0;
 714 }
 715
 716 static uint32_t
 717 color_to_uint32 (const pixman_color_t *color)
 718 {
 719     return
 720         (color->alpha >> 8 << 24) |
 721         (color->red >> 8 << 16) |
 722         (color->green & 0xff00) |
 723         (color->blue >> 8);
 724 }
 725
 726 static pixman_bool_t
 727 color_to_pixel (pixman_color_t *color,
 728                 uint32_t       *pixel,
 729                 pixman_format_code_t format)
 730 {
 731     uint32_t c = color_to_uint32 (color);
 732
 733     if (!(format == PIXMAN_a8r8g8b8     ||
 734           format == PIXMAN_x8r8g8b8     ||
 735           format == PIXMAN_a8b8g8r8     ||
 736           format == PIXMAN_x8b8g8r8     ||
 737           format == PIXMAN_b8g8r8a8     ||
 738           format == PIXMAN_b8g8r8x8     ||
 739           format == PIXMAN_r5g6b5       ||
 740           format == PIXMAN_b5g6r5       ||
 741           format == PIXMAN_a8))
 742     {
 743         return FALSE;
 744     }
 745
 746     if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_ABGR)
 747     {
 748         c = ((c & 0xff000000) >>  0) |
 749             ((c & 0x00ff0000) >> 16) |
 750             ((c & 0x0000ff00) >>  0) |
 751             ((c & 0x000000ff) << 16);
 752     }
 753     if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_BGRA)
 754     {
 755         c = ((c & 0xff000000) >> 24) |
 756             ((c & 0x00ff0000) >>  8) |
 757             ((c & 0x0000ff00) <<  8) |
 758             ((c & 0x000000ff) << 24);
 759     }
 760
 761     if (format == PIXMAN_a8)
 762         c = c >> 24;
 763     else if (format == PIXMAN_r5g6b5 ||
 764              format == PIXMAN_b5g6r5)
 765         c = cvt8888to0565 (c);
 766
 767 #if 0
 768     printf ("color: %x %x %x %x\n", color->alpha, color->red, color->green, color->blue);
 769     printf ("pixel: %x\n", c);
 770 #endif
 771
 772     *pixel = c;
 773     return TRUE;
 774 }
 775
 776 PIXMAN_EXPORT pixman_bool_t
 777 pixman_image_fill_rectangles (pixman_op_t                   op,
 778                               pixman_image_t               *dest,
 779                               pixman_color_t               *color,
 780                               int                           n_rects,
 781                               const pixman_rectangle16_t   *rects)
 782 {
 783     pixman_image_t *solid;
 784     pixman_color_t c;
 785     int i;
 786
 787     if (color->alpha == 0xffff)
 788     {
 789         if (op == PIXMAN_OP_OVER)
 790             op = PIXMAN_OP_SRC;
 791     }
 792
 793     if (op == PIXMAN_OP_CLEAR)
 794     {
 795         c.red = 0;
 796         c.green = 0;
 797         c.blue = 0;
 798         c.alpha = 0;
 799
 800         color = &c;
 801
 802         op = PIXMAN_OP_SRC;
 803     }
 804
 805     if (op == PIXMAN_OP_SRC)
 806     {
 807         uint32_t pixel;
 808
 809         if (color_to_pixel (color, &pixel, dest->bits.format))
 810         {
 811             for (i = 0; i < n_rects; ++i)
 812             {
 813                 pixman_region32_t fill_region;
 814                 int n_boxes, j;
 815                 pixman_box32_t *boxes;
 816
 817                 pixman_region32_init_rect (&fill_region, rects[i].x, rects[i].y, rects[i].width, rects[i].height);
 818                 if (!pixman_region32_intersect (&fill_region,
 819                                                 &fill_region,
 820                                                 &dest->common.clip_region))
 821                     return FALSE;
 822
 823
 824                 boxes = pixman_region32_rectangles (&fill_region, &n_boxes);
 825                 for (j = 0; j < n_boxes; ++j)
 826                 {
 827                     const pixman_box32_t *box = &(boxes[j]);
 828                     pixman_fill (dest->bits.bits, dest->bits.rowstride, PIXMAN_FORMAT_BPP (dest->bits.format),
 829                                  box->x1, box->y1, box->x2 - box->x1, box->y2 - box->y1,
 830                                  pixel);
 831                 }
 832
 833                 pixman_region32_fini (&fill_region);
 834             }
 835             return TRUE;
 836         }
 837     }
 838
 839     solid = pixman_image_create_solid_fill (color);
 840     if (!solid)
 841         return FALSE;
 842
 843     for (i = 0; i < n_rects; ++i)
 844     {
 845         const pixman_rectangle16_t *rect = &(rects[i]);
 846
 847         pixman_image_composite (op, solid, NULL, dest,
 848                                 0, 0, 0, 0,
 849                                 rect->x, rect->y,
 850                                 rect->width, rect->height);
 851     }
 852
 853     pixman_image_unref (solid);
 854
 855     return TRUE;
 856 }
 857
 858 pixman_bool_t
 859 pixman_image_can_get_solid (pixman_image_t *image)
 860 {
 861     if (image->type == SOLID)
 862         return TRUE;
 863
 864     if (image->type != BITS     ||
 865         image->bits.width != 1  ||
 866         image->bits.height != 1)
 867     {
 868         return FALSE;
 869     }
 870
 871     if (image->common.repeat != PIXMAN_REPEAT_NORMAL)
 872         return FALSE;
 873
 874     switch (image->bits.format)
 875     {
 876     case PIXMAN_a8r8g8b8:
 877     case PIXMAN_x8r8g8b8:
 878     case PIXMAN_a8b8g8r8:
 879     case PIXMAN_x8b8g8r8:
 880     case PIXMAN_b8g8r8a8:
 881     case PIXMAN_b8g8r8x8:
 882     case PIXMAN_r8g8b8:
 883     case PIXMAN_b8g8r8:
 884     case PIXMAN_r5g6b5:
 885     case PIXMAN_b5g6r5:
 886         return TRUE;
 887     default:
 888         return FALSE;
 889     }
 890 }
 891
 892 pixman_bool_t
 893 pixman_image_is_opaque(pixman_image_t *image)
 894 {
 895     int i = 0;
 896     int gradientNumberOfColors = 0;
 897
 898     if(image->common.alpha_map)
 899         return FALSE;
 900
 901     switch(image->type)
 902     {
 903     case BITS:
 904         if(PIXMAN_FORMAT_A(image->bits.format))
 905             return FALSE;
 906         break;
 907
 908     case LINEAR:
 909     case CONICAL:
 910     case RADIAL:
 911         gradientNumberOfColors = image->gradient.n_stops;
 912         i=0;
 913         while(i<gradientNumberOfColors)
 914         {
 915             if(image->gradient.stops[i].color.alpha != 0xffff)
 916                 return FALSE;
 917             i++;
 918         }
 919         break;
 920
 921     case SOLID:
 922          if(Alpha(image->solid.color) != 0xff)
 923             return FALSE;
 924         break;
 925     }
 926
 927     /* Convolution filters can introduce translucency if the sum of the weights
 928        is lower than 1. */
 929     if (image->common.filter == PIXMAN_FILTER_CONVOLUTION)
 930          return FALSE;
 931
 932     if (image->common.repeat == PIXMAN_REPEAT_NONE)
 933     {
 934         if (image->common.filter != PIXMAN_FILTER_NEAREST)
 935             return FALSE;
 936
 937         if (image->common.transform)
 938             return FALSE;
 939
 940         /* Gradients do not necessarily cover the entire compositing area */
 941         if (image->type == LINEAR || image->type == CONICAL || image->type == RADIAL)
 942             return FALSE;
 943     }
 944
 945      return TRUE;
 946 }