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 #include <assert.h>
  31
  32 #include "pixman-private.h"
  33 #include "pixman-combine32.h"
  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->common.class = SOURCE_IMAGE_CLASS_UNKNOWN;
  52
  53     return TRUE;
  54 }
  55
  56 /*
  57  * By default, just evaluate the image at 32bpp and expand.  Individual image
  58  * types can plug in a better scanline getter if they want to. For example
  59  * we  could produce smoother gradients by evaluating them at higher color
  60  * depth, but that's a project for the future.
  61  */
  62 void
  63 _pixman_image_get_scanline_generic_64 (pixman_image_t * image,
  64                                        int              x,
  65                                        int              y,
  66                                        int              width,
  67                                        uint32_t *       buffer,
  68                                        const uint32_t * mask,
  69                                        uint32_t         mask_bits)
  70 {
  71     uint32_t *mask8 = NULL;
  72
  73     /* Contract the mask image, if one exists, so that the 32-bit fetch
  74      * function can use it.
  75      */
  76     if (mask)
  77     {
  78         mask8 = pixman_malloc_ab (width, sizeof(uint32_t));
  79         if (!mask8)
  80             return;
  81
  82         pixman_contract (mask8, (uint64_t *)mask, width);
  83     }
  84
  85     /* Fetch the source image into the first half of buffer. */
  86     _pixman_image_get_scanline_32 (image, x, y, width, (uint32_t*)buffer, mask8,
  87                                    mask_bits);
  88
  89     /* Expand from 32bpp to 64bpp in place. */
  90     pixman_expand ((uint64_t *)buffer, buffer, PIXMAN_a8r8g8b8, width);
  91
  92     free (mask8);
  93 }
  94
  95 pixman_image_t *
  96 _pixman_image_allocate (void)
  97 {
  98     pixman_image_t *image = malloc (sizeof (pixman_image_t));
  99
 100     if (image)
 101     {
 102         image_common_t *common = &image->common;
 103
 104         pixman_region32_init (&common->clip_region);
 105
 106         common->have_clip_region = FALSE;
 107         common->clip_sources = FALSE;
 108         common->transform = NULL;
 109         common->repeat = PIXMAN_REPEAT_NONE;
 110         common->filter = PIXMAN_FILTER_NEAREST;
 111         common->filter_params = NULL;
 112         common->n_filter_params = 0;
 113         common->alpha_map = NULL;
 114         common->component_alpha = FALSE;
 115         common->ref_count = 1;
 116         common->classify = NULL;
 117         common->client_clip = FALSE;
 118         common->destroy_func = NULL;
 119         common->destroy_data = NULL;
 120         common->dirty = TRUE;
 121     }
 122
 123     return image;
 124 }
 125
 126 source_image_class_t
 127 _pixman_image_classify (pixman_image_t *image,
 128                         int             x,
 129                         int             y,
 130                         int             width,
 131                         int             height)
 132 {
 133     if (image->common.classify)
 134         return image->common.classify (image, x, y, width, height);
 135     else
 136         return SOURCE_IMAGE_CLASS_UNKNOWN;
 137 }
 138
 139 void
 140 _pixman_image_get_scanline_32 (pixman_image_t *image,
 141                                int             x,
 142                                int             y,
 143                                int             width,
 144                                uint32_t *      buffer,
 145                                const uint32_t *mask,
 146                                uint32_t        mask_bits)
 147 {
 148     image->common.get_scanline_32 (image, x, y, width, buffer, mask, mask_bits);
 149 }
 150
 151 /* Even thought the type of buffer is uint32_t *, the function actually expects
 152  * a uint64_t *buffer.
 153  */
 154 void
 155 _pixman_image_get_scanline_64 (pixman_image_t *image,
 156                                int             x,
 157                                int             y,
 158                                int             width,
 159                                uint32_t *      buffer,
 160                                const uint32_t *unused,
 161                                uint32_t        unused2)
 162 {
 163     image->common.get_scanline_64 (image, x, y, width, buffer, unused, unused2);
 164 }
 165
 166 static void
 167 image_property_changed (pixman_image_t *image)
 168 {
 169     image->common.dirty = TRUE;
 170 }
 171
 172 /* Ref Counting */
 173 PIXMAN_EXPORT pixman_image_t *
 174 pixman_image_ref (pixman_image_t *image)
 175 {
 176     image->common.ref_count++;
 177
 178     return image;
 179 }
 180
 181 /* returns TRUE when the image is freed */
 182 PIXMAN_EXPORT pixman_bool_t
 183 pixman_image_unref (pixman_image_t *image)
 184 {
 185     image_common_t *common = (image_common_t *)image;
 186
 187     common->ref_count--;
 188
 189     if (common->ref_count == 0)
 190     {
 191         if (image->common.destroy_func)
 192             image->common.destroy_func (image, image->common.destroy_data);
 193
 194         pixman_region32_fini (&common->clip_region);
 195
 196         if (common->transform)
 197             free (common->transform);
 198
 199         if (common->filter_params)
 200             free (common->filter_params);
 201
 202         if (common->alpha_map)
 203             pixman_image_unref ((pixman_image_t *)common->alpha_map);
 204
 205         if (image->type == LINEAR ||
 206             image->type == RADIAL ||
 207             image->type == CONICAL)
 208         {
 209             if (image->gradient.stops)
 210                 free (image->gradient.stops);
 211         }
 212
 213         if (image->type == BITS && image->bits.free_me)
 214             free (image->bits.free_me);
 215
 216         free (image);
 217
 218         return TRUE;
 219     }
 220
 221     return FALSE;
 222 }
 223
 224 PIXMAN_EXPORT void
 225 pixman_image_set_destroy_function (pixman_image_t *            image,
 226                                    pixman_image_destroy_func_t func,
 227                                    void *                      data)
 228 {
 229     image->common.destroy_func = func;
 230     image->common.destroy_data = data;
 231 }
 232
 233 PIXMAN_EXPORT void *
 234 pixman_image_get_destroy_data (pixman_image_t *image)
 235 {
 236   return image->common.destroy_data;
 237 }
 238
 239 void
 240 _pixman_image_reset_clip_region (pixman_image_t *image)
 241 {
 242     image->common.have_clip_region = FALSE;
 243 }
 244
 245 static pixman_bool_t out_of_bounds_workaround = TRUE;
 246
 247 /* Old X servers rely on out-of-bounds accesses when they are asked
 248  * to composite with a window as the source. They create a pixman image
 249  * pointing to some bogus position in memory, but then they set a clip
 250  * region to the position where the actual bits are.
 251  *
 252  * Due to a bug in old versions of pixman, where it would not clip
 253  * against the image bounds when a clip region was set, this would
 254  * actually work. So by default we allow certain out-of-bound access
 255  * to happen unless explicitly disabled.
 256  *
 257  * Fixed X servers should call this function to disable the workaround.
 258  */
 259 PIXMAN_EXPORT void
 260 pixman_disable_out_of_bounds_workaround (void)
 261 {
 262     out_of_bounds_workaround = FALSE;
 263 }
 264
 265 static pixman_bool_t
 266 source_image_needs_out_of_bounds_workaround (bits_image_t *image)
 267 {
 268     if (image->common.clip_sources                      &&
 269         image->common.repeat == PIXMAN_REPEAT_NONE      &&
 270         image->common.have_clip_region                  &&
 271         out_of_bounds_workaround)
 272     {
 273         if (!image->common.client_clip)
 274         {
 275             /* There is no client clip, so if the clip region extends beyond the
 276              * drawable geometry, it must be because the X server generated the
 277              * bogus clip region.
 278              */
 279             const pixman_box32_t *extents =
 280                 pixman_region32_extents (&image->common.clip_region);
 281
 282             if (extents->x1 >= 0 && extents->x2 <= image->width &&
 283                 extents->y1 >= 0 && extents->y2 <= image->height)
 284             {
 285                 return FALSE;
 286             }
 287         }
 288
 289         return TRUE;
 290     }
 291
 292     return FALSE;
 293 }
 294
 295 static void
 296 compute_image_info (pixman_image_t *image)
 297 {
 298     pixman_format_code_t code;
 299     uint32_t flags = 0;
 300
 301     /* Transform */
 302     if (!image->common.transform)
 303     {
 304         flags |= (FAST_PATH_ID_TRANSFORM | FAST_PATH_X_UNIT_POSITIVE);
 305     }
 306     else
 307     {
 308         if (image->common.transform->matrix[0][1] == 0 &&
 309             image->common.transform->matrix[1][0] == 0 &&
 310             image->common.transform->matrix[2][0] == 0 &&
 311             image->common.transform->matrix[2][1] == 0 &&
 312             image->common.transform->matrix[2][2] == pixman_fixed_1)
 313         {
 314             flags |= FAST_PATH_SCALE_TRANSFORM;
 315         }
 316
 317         if (image->common.transform->matrix[0][0] > 0)
 318             flags |= FAST_PATH_X_UNIT_POSITIVE;
 319     }
 320
 321     /* Alpha map */
 322     if (!image->common.alpha_map)
 323         flags |= FAST_PATH_NO_ALPHA_MAP;
 324
 325     /* Filter */
 326     switch (image->common.filter)
 327     {
 328     case PIXMAN_FILTER_NEAREST:
 329     case PIXMAN_FILTER_FAST:
 330         flags |= (FAST_PATH_NEAREST_FILTER | FAST_PATH_NO_CONVOLUTION_FILTER);
 331         break;
 332
 333     case PIXMAN_FILTER_CONVOLUTION:
 334         break;
 335
 336     default:
 337         flags |= FAST_PATH_NO_CONVOLUTION_FILTER;
 338         break;
 339     }
 340
 341     /* Repeat mode */
 342     switch (image->common.repeat)
 343     {
 344     case PIXMAN_REPEAT_NONE:
 345         flags |= FAST_PATH_NO_REFLECT_REPEAT | FAST_PATH_NO_PAD_REPEAT;
 346         break;
 347
 348     case PIXMAN_REPEAT_REFLECT:
 349         flags |= FAST_PATH_NO_PAD_REPEAT | FAST_PATH_NO_NONE_REPEAT;
 350         break;
 351
 352     case PIXMAN_REPEAT_PAD:
 353         flags |= FAST_PATH_NO_REFLECT_REPEAT | FAST_PATH_NO_NONE_REPEAT;
 354         break;
 355
 356     default:
 357         flags |= FAST_PATH_NO_REFLECT_REPEAT | FAST_PATH_NO_PAD_REPEAT | FAST_PATH_NO_NONE_REPEAT;
 358         break;
 359     }
 360
 361     /* Component alpha */
 362     if (image->common.component_alpha)
 363         flags |= FAST_PATH_COMPONENT_ALPHA;
 364     else
 365         flags |= FAST_PATH_UNIFIED_ALPHA;
 366
 367     flags |= (FAST_PATH_NO_ACCESSORS | FAST_PATH_NO_WIDE_FORMAT);
 368
 369     /* Type specific checks */
 370     switch (image->type)
 371     {
 372     case SOLID:
 373         code = PIXMAN_solid;
 374
 375         if (image->solid.color.alpha == 0xffff)
 376             flags |= FAST_PATH_IS_OPAQUE;
 377         break;
 378
 379     case BITS:
 380         if (image->bits.width == 1      &&
 381             image->bits.height == 1     &&
 382             image->common.repeat != PIXMAN_REPEAT_NONE)
 383         {
 384             code = PIXMAN_solid;
 385         }
 386         else
 387         {
 388             code = image->bits.format;
 389
 390             if (!image->common.transform &&
 391                 image->common.repeat == PIXMAN_REPEAT_NORMAL)
 392             {
 393                 flags |= FAST_PATH_SIMPLE_REPEAT;
 394             }
 395         }
 396
 397         if (image->common.repeat != PIXMAN_REPEAT_NONE                          &&
 398             !PIXMAN_FORMAT_A (image->bits.format)                               &&
 399             PIXMAN_FORMAT_TYPE (image->bits.format) != PIXMAN_TYPE_GRAY         &&
 400             PIXMAN_FORMAT_TYPE (image->bits.format) != PIXMAN_TYPE_COLOR)
 401         {
 402             flags |= FAST_PATH_IS_OPAQUE;
 403         }
 404
 405         if (source_image_needs_out_of_bounds_workaround (&image->bits))
 406             flags |= FAST_PATH_NEEDS_WORKAROUND;
 407
 408         if (image->bits.read_func || image->bits.write_func)
 409             flags &= ~FAST_PATH_NO_ACCESSORS;
 410
 411         if (PIXMAN_FORMAT_IS_WIDE (image->bits.format))
 412             flags &= ~FAST_PATH_NO_WIDE_FORMAT;
 413         break;
 414
 415     case LINEAR:
 416     case RADIAL:
 417         code = PIXMAN_unknown;
 418
 419         if (image->common.repeat != PIXMAN_REPEAT_NONE)
 420         {
 421             int i;
 422
 423             flags |= FAST_PATH_IS_OPAQUE;
 424             for (i = 0; i < image->gradient.n_stops; ++i)
 425             {
 426                 if (image->gradient.stops[i].color.alpha != 0xffff)
 427                 {
 428                     flags &= ~FAST_PATH_IS_OPAQUE;
 429                     break;
 430                 }
 431             }
 432         }
 433         break;
 434
 435     default:
 436         code = PIXMAN_unknown;
 437         break;
 438     }
 439
 440     /* Both alpha maps and convolution filters can introduce
 441      * non-opaqueness in otherwise opaque images. Also
 442      * an image with component alpha turned on is only opaque
 443      * if all channels are opaque, so we simply turn it off
 444      * unconditionally for those images.
 445      */
 446     if (image->common.alpha_map                                 ||
 447         image->common.filter == PIXMAN_FILTER_CONVOLUTION       ||
 448         image->common.component_alpha)
 449     {
 450         flags &= ~FAST_PATH_IS_OPAQUE;
 451     }
 452
 453     image->common.flags = flags;
 454     image->common.extended_format_code = code;
 455 }
 456
 457 void
 458 _pixman_image_validate (pixman_image_t *image)
 459 {
 460     if (image->common.dirty)
 461     {
 462         compute_image_info (image);
 463
 464         /* It is important that property_changed is
 465          * called *after* compute_image_info() because
 466          * property_changed() can make use of the flags
 467          * to set up accessors etc.
 468          */
 469         image->common.property_changed (image);
 470
 471         image->common.dirty = FALSE;
 472     }
 473
 474     if (image->common.alpha_map)
 475         _pixman_image_validate ((pixman_image_t *)image->common.alpha_map);
 476 }
 477
 478 PIXMAN_EXPORT pixman_bool_t
 479 pixman_image_set_clip_region32 (pixman_image_t *   image,
 480                                 pixman_region32_t *region)
 481 {
 482     image_common_t *common = (image_common_t *)image;
 483     pixman_bool_t result;
 484
 485     if (region)
 486     {
 487         if ((result = pixman_region32_copy (&common->clip_region, region)))
 488             image->common.have_clip_region = TRUE;
 489     }
 490     else
 491     {
 492         _pixman_image_reset_clip_region (image);
 493
 494         result = TRUE;
 495     }
 496
 497     image_property_changed (image);
 498
 499     return result;
 500 }
 501
 502 PIXMAN_EXPORT pixman_bool_t
 503 pixman_image_set_clip_region (pixman_image_t *   image,
 504                               pixman_region16_t *region)
 505 {
 506     image_common_t *common = (image_common_t *)image;
 507     pixman_bool_t result;
 508
 509     if (region)
 510     {
 511         if ((result = pixman_region32_copy_from_region16 (&common->clip_region, region)))
 512             image->common.have_clip_region = TRUE;
 513     }
 514     else
 515     {
 516         _pixman_image_reset_clip_region (image);
 517
 518         result = TRUE;
 519     }
 520
 521     image_property_changed (image);
 522
 523     return result;
 524 }
 525
 526 PIXMAN_EXPORT void
 527 pixman_image_set_has_client_clip (pixman_image_t *image,
 528                                   pixman_bool_t   client_clip)
 529 {
 530     image->common.client_clip = client_clip;
 531 }
 532
 533 PIXMAN_EXPORT pixman_bool_t
 534 pixman_image_set_transform (pixman_image_t *          image,
 535                             const pixman_transform_t *transform)
 536 {
 537     static const pixman_transform_t id =
 538     {
 539         { { pixman_fixed_1, 0, 0 },
 540           { 0, pixman_fixed_1, 0 },
 541           { 0, 0, pixman_fixed_1 } }
 542     };
 543
 544     image_common_t *common = (image_common_t *)image;
 545     pixman_bool_t result;
 546
 547     if (common->transform == transform)
 548         return TRUE;
 549
 550     if (memcmp (&id, transform, sizeof (pixman_transform_t)) == 0)
 551     {
 552         free (common->transform);
 553         common->transform = NULL;
 554         result = TRUE;
 555
 556         goto out;
 557     }
 558
 559     if (common->transform == NULL)
 560         common->transform = malloc (sizeof (pixman_transform_t));
 561
 562     if (common->transform == NULL)
 563     {
 564         result = FALSE;
 565
 566         goto out;
 567     }
 568
 569     memcpy (common->transform, transform, sizeof(pixman_transform_t));
 570
 571     result = TRUE;
 572
 573 out:
 574     image_property_changed (image);
 575
 576     return result;
 577 }
 578
 579 PIXMAN_EXPORT void
 580 pixman_image_set_repeat (pixman_image_t *image,
 581                          pixman_repeat_t repeat)
 582 {
 583     image->common.repeat = repeat;
 584
 585     image_property_changed (image);
 586 }
 587
 588 PIXMAN_EXPORT pixman_bool_t
 589 pixman_image_set_filter (pixman_image_t *      image,
 590                          pixman_filter_t       filter,
 591                          const pixman_fixed_t *params,
 592                          int                   n_params)
 593 {
 594     image_common_t *common = (image_common_t *)image;
 595     pixman_fixed_t *new_params;
 596
 597     if (params == common->filter_params && filter == common->filter)
 598         return TRUE;
 599
 600     new_params = NULL;
 601     if (params)
 602     {
 603         new_params = pixman_malloc_ab (n_params, sizeof (pixman_fixed_t));
 604         if (!new_params)
 605             return FALSE;
 606
 607         memcpy (new_params,
 608                 params, n_params * sizeof (pixman_fixed_t));
 609     }
 610
 611     common->filter = filter;
 612
 613     if (common->filter_params)
 614         free (common->filter_params);
 615
 616     common->filter_params = new_params;
 617     common->n_filter_params = n_params;
 618
 619     image_property_changed (image);
 620     return TRUE;
 621 }
 622
 623 PIXMAN_EXPORT void
 624 pixman_image_set_source_clipping (pixman_image_t *image,
 625                                   pixman_bool_t   clip_sources)
 626 {
 627     image->common.clip_sources = clip_sources;
 628
 629     image_property_changed (image);
 630 }
 631
 632 /* Unlike all the other property setters, this function does not
 633  * copy the content of indexed. Doing this copying is simply
 634  * way, way too expensive.
 635  */
 636 PIXMAN_EXPORT void
 637 pixman_image_set_indexed (pixman_image_t *        image,
 638                           const pixman_indexed_t *indexed)
 639 {
 640     bits_image_t *bits = (bits_image_t *)image;
 641
 642     bits->indexed = indexed;
 643
 644     image_property_changed (image);
 645 }
 646
 647 PIXMAN_EXPORT void
 648 pixman_image_set_alpha_map (pixman_image_t *image,
 649                             pixman_image_t *alpha_map,
 650                             int16_t         x,
 651                             int16_t         y)
 652 {
 653     image_common_t *common = (image_common_t *)image;
 654
 655     return_if_fail (!alpha_map || alpha_map->type == BITS);
 656
 657     if (common->alpha_map != (bits_image_t *)alpha_map)
 658     {
 659         if (common->alpha_map)
 660             pixman_image_unref ((pixman_image_t *)common->alpha_map);
 661
 662         if (alpha_map)
 663             common->alpha_map = (bits_image_t *)pixman_image_ref (alpha_map);
 664         else
 665             common->alpha_map = NULL;
 666     }
 667
 668     common->alpha_origin_x = x;
 669     common->alpha_origin_y = y;
 670
 671     image_property_changed (image);
 672 }
 673
 674 PIXMAN_EXPORT void
 675 pixman_image_set_component_alpha   (pixman_image_t *image,
 676                                     pixman_bool_t   component_alpha)
 677 {
 678     image->common.component_alpha = component_alpha;
 679
 680     image_property_changed (image);
 681 }
 682
 683 PIXMAN_EXPORT pixman_bool_t
 684 pixman_image_get_component_alpha   (pixman_image_t       *image)
 685 {
 686     return image->common.component_alpha;
 687 }
 688
 689 PIXMAN_EXPORT void
 690 pixman_image_set_accessors (pixman_image_t *           image,
 691                             pixman_read_memory_func_t  read_func,
 692                             pixman_write_memory_func_t write_func)
 693 {
 694     return_if_fail (image != NULL);
 695
 696     if (image->type == BITS)
 697     {
 698         image->bits.read_func = read_func;
 699         image->bits.write_func = write_func;
 700
 701         image_property_changed (image);
 702     }
 703 }
 704
 705 PIXMAN_EXPORT uint32_t *
 706 pixman_image_get_data (pixman_image_t *image)
 707 {
 708     if (image->type == BITS)
 709         return image->bits.bits;
 710
 711     return NULL;
 712 }
 713
 714 PIXMAN_EXPORT int
 715 pixman_image_get_width (pixman_image_t *image)
 716 {
 717     if (image->type == BITS)
 718         return image->bits.width;
 719
 720     return 0;
 721 }
 722
 723 PIXMAN_EXPORT int
 724 pixman_image_get_height (pixman_image_t *image)
 725 {
 726     if (image->type == BITS)
 727         return image->bits.height;
 728
 729     return 0;
 730 }
 731
 732 PIXMAN_EXPORT int
 733 pixman_image_get_stride (pixman_image_t *image)
 734 {
 735     if (image->type == BITS)
 736         return image->bits.rowstride * (int) sizeof (uint32_t);
 737
 738     return 0;
 739 }
 740
 741 PIXMAN_EXPORT int
 742 pixman_image_get_depth (pixman_image_t *image)
 743 {
 744     if (image->type == BITS)
 745         return PIXMAN_FORMAT_DEPTH (image->bits.format);
 746
 747     return 0;
 748 }
 749
 750 PIXMAN_EXPORT pixman_format_code_t
 751 pixman_image_get_format (pixman_image_t *image)
 752 {
 753     if (image->type == BITS)
 754         return image->bits.format;
 755
 756     return 0;
 757 }
 758
 759 uint32_t
 760 _pixman_image_get_solid (pixman_image_t *     image,
 761                          pixman_format_code_t format)
 762 {
 763     uint32_t result;
 764
 765     _pixman_image_get_scanline_32 (image, 0, 0, 1, &result, NULL, 0);
 766
 767     /* If necessary, convert RGB <--> BGR. */
 768     if (PIXMAN_FORMAT_TYPE (format) != PIXMAN_TYPE_ARGB)
 769     {
 770         result = (((result & 0xff000000) >>  0) |
 771                   ((result & 0x00ff0000) >> 16) |
 772                   ((result & 0x0000ff00) >>  0) |
 773                   ((result & 0x000000ff) << 16));
 774     }
 775
 776     return result;
 777 }