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 static source_pict_class_t
  36 SourcePictureClassify (pixman_image_t *image,
  37                        int             x,
  38                        int             y,
  39                        int             width,
  40                        int             height)
  41 {
  42     source_image_t *pict = &image->source;
  43
  44     if (pict->class != SOURCE_IMAGE_CLASS_UNKNOWN)
  45         return pict->class;
  46
  47     pict->class = SOURCE_IMAGE_CLASS_NEITHER;
  48
  49     if (pict->common.type == SOLID)
  50     {
  51         pict->class = SOURCE_IMAGE_CLASS_HORIZONTAL;
  52     }
  53     else if (pict->common.type == LINEAR)
  54     {
  55         linear_gradient_t *linear = (linear_gradient_t *)pict;
  56         pixman_vector_t   v;
  57         pixman_fixed_32_32_t l;
  58         pixman_fixed_48_16_t dx, dy, a, b, off;
  59         pixman_fixed_48_16_t factors[4];
  60         int          i;
  61
  62         dx = linear->p2.x - linear->p1.x;
  63         dy = linear->p2.y - linear->p1.y;
  64         l = dx * dx + dy * dy;
  65         if (l)
  66         {
  67             a = (dx << 32) / l;
  68             b = (dy << 32) / l;
  69         }
  70         else
  71         {
  72             a = b = 0;
  73         }
  74
  75         off = (-a * linear->p1.x
  76                -b * linear->p1.y) >> 16;
  77
  78         for (i = 0; i < 3; i++)
  79         {
  80             v.vector[0] = pixman_int_to_fixed ((i % 2) * (width  - 1) + x);
  81             v.vector[1] = pixman_int_to_fixed ((i / 2) * (height - 1) + y);
  82             v.vector[2] = pixman_fixed_1;
  83
  84             if (pict->common.transform)
  85             {
  86                 if (!pixman_transform_point_3d (pict->common.transform, &v))
  87                     return SOURCE_IMAGE_CLASS_UNKNOWN;
  88             }
  89
  90             factors[i] = ((a * v.vector[0] + b * v.vector[1]) >> 16) + off;
  91         }
  92
  93         if (factors[2] == factors[0])
  94             pict->class = SOURCE_IMAGE_CLASS_HORIZONTAL;
  95         else if (factors[1] == factors[0])
  96             pict->class = SOURCE_IMAGE_CLASS_VERTICAL;
  97     }
  98
  99     return pict->class;
 100 }
 101
 102 static void
 103 init_source_image (source_image_t *image)
 104 {
 105     image->class = SOURCE_IMAGE_CLASS_UNKNOWN;
 106     image->common.classify = SourcePictureClassify;
 107 }
 108
 109 static pixman_bool_t
 110 init_gradient (gradient_t     *gradient,
 111                const pixman_gradient_stop_t *stops,
 112                int             n_stops)
 113 {
 114     return_val_if_fail (n_stops > 0, FALSE);
 115
 116     init_source_image (&gradient->common);
 117
 118     gradient->stops = pixman_malloc_ab (n_stops, sizeof (pixman_gradient_stop_t));
 119     if (!gradient->stops)
 120         return FALSE;
 121
 122     memcpy (gradient->stops, stops, n_stops * sizeof (pixman_gradient_stop_t));
 123
 124     gradient->n_stops = n_stops;
 125
 126     gradient->stop_range = 0xffff;
 127     gradient->color_table = NULL;
 128     gradient->color_table_size = 0;
 129
 130     return TRUE;
 131 }
 132
 133 static uint32_t
 134 color_to_uint32 (const pixman_color_t *color)
 135 {
 136     return
 137         (color->alpha >> 8 << 24) |
 138         (color->red >> 8 << 16) |
 139         (color->green & 0xff00) |
 140         (color->blue >> 8);
 141 }
 142
 143 static pixman_image_t *
 144 allocate_image (void)
 145 {
 146     pixman_image_t *image = malloc (sizeof (pixman_image_t));
 147
 148     if (image)
 149     {
 150         image_common_t *common = &image->common;
 151
 152         pixman_region32_init (&common->full_region);
 153         pixman_region32_init (&common->clip_region);
 154         common->src_clip = &common->full_region;
 155         common->has_client_clip = FALSE;
 156         common->transform = NULL;
 157         common->repeat = PIXMAN_REPEAT_NONE;
 158         common->filter = PIXMAN_FILTER_NEAREST;
 159         common->filter_params = NULL;
 160         common->n_filter_params = 0;
 161         common->alpha_map = NULL;
 162         common->component_alpha = FALSE;
 163         common->ref_count = 1;
 164         common->read_func = NULL;
 165         common->write_func = NULL;
 166     }
 167
 168     return image;
 169 }
 170
 171 source_pict_class_t
 172 _pixman_image_classify (pixman_image_t *image,
 173                         int             x,
 174                         int             y,
 175                         int             width,
 176                         int             height)
 177 {
 178     if (image->common.classify)
 179         return image->common.classify (image, x, y, width, height);
 180     else
 181         return SOURCE_IMAGE_CLASS_NEITHER;
 182 }
 183
 184 /* Ref Counting */
 185 PIXMAN_EXPORT pixman_image_t *
 186 pixman_image_ref (pixman_image_t *image)
 187 {
 188     image->common.ref_count++;
 189
 190     return image;
 191 }
 192
 193 /* returns TRUE when the image is freed */
 194 PIXMAN_EXPORT pixman_bool_t
 195 pixman_image_unref (pixman_image_t *image)
 196 {
 197     image_common_t *common = (image_common_t *)image;
 198
 199     common->ref_count--;
 200
 201     if (common->ref_count == 0)
 202     {
 203         pixman_region32_fini (&common->clip_region);
 204         pixman_region32_fini (&common->full_region);
 205
 206         if (common->transform)
 207             free (common->transform);
 208
 209         if (common->filter_params)
 210             free (common->filter_params);
 211
 212         if (common->alpha_map)
 213             pixman_image_unref ((pixman_image_t *)common->alpha_map);
 214
 215 #if 0
 216         if (image->type == BITS && image->bits.indexed)
 217             free (image->bits.indexed);
 218 #endif
 219
 220 #if 0
 221         memset (image, 0xaa, sizeof (pixman_image_t));
 222 #endif
 223         if (image->type == LINEAR || image->type == RADIAL || image->type == CONICAL)
 224         {
 225             if (image->gradient.stops)
 226                 free (image->gradient.stops);
 227         }
 228
 229
 230         if (image->type == BITS && image->bits.free_me)
 231             free (image->bits.free_me);
 232
 233         free (image);
 234
 235         return TRUE;
 236     }
 237
 238     return FALSE;
 239 }
 240
 241 /* Constructors */
 242 PIXMAN_EXPORT pixman_image_t *
 243 pixman_image_create_solid_fill (pixman_color_t *color)
 244 {
 245     pixman_image_t *img = allocate_image();
 246     if (!img)
 247         return NULL;
 248
 249     init_source_image (&img->solid.common);
 250
 251     img->type = SOLID;
 252     img->solid.color = color_to_uint32 (color);
 253
 254     return img;
 255 }
 256
 257 PIXMAN_EXPORT pixman_image_t *
 258 pixman_image_create_linear_gradient (pixman_point_fixed_t         *p1,
 259                                      pixman_point_fixed_t         *p2,
 260                                      const pixman_gradient_stop_t *stops,
 261                                      int                           n_stops)
 262 {
 263     pixman_image_t *image;
 264     linear_gradient_t *linear;
 265
 266     return_val_if_fail (n_stops >= 2, NULL);
 267
 268     image = allocate_image();
 269
 270     if (!image)
 271         return NULL;
 272
 273     linear = &image->linear;
 274
 275     if (!init_gradient (&linear->common, stops, n_stops))
 276     {
 277         free (image);
 278         return NULL;
 279     }
 280
 281     linear->p1 = *p1;
 282     linear->p2 = *p2;
 283
 284     image->type = LINEAR;
 285
 286     return image;
 287 }
 288
 289
 290 PIXMAN_EXPORT pixman_image_t *
 291 pixman_image_create_radial_gradient (pixman_point_fixed_t         *inner,
 292                                      pixman_point_fixed_t         *outer,
 293                                      pixman_fixed_t                inner_radius,
 294                                      pixman_fixed_t                outer_radius,
 295                                      const pixman_gradient_stop_t *stops,
 296                                      int                           n_stops)
 297 {
 298     pixman_image_t *image;
 299     radial_gradient_t *radial;
 300
 301     return_val_if_fail (n_stops >= 2, NULL);
 302
 303     image = allocate_image();
 304
 305     if (!image)
 306         return NULL;
 307
 308     radial = &image->radial;
 309
 310     if (!init_gradient (&radial->common, stops, n_stops))
 311     {
 312         free (image);
 313         return NULL;
 314     }
 315
 316     image->type = RADIAL;
 317
 318     radial->c1.x = inner->x;
 319     radial->c1.y = inner->y;
 320     radial->c1.radius = inner_radius;
 321     radial->c2.x = outer->x;
 322     radial->c2.y = outer->y;
 323     radial->c2.radius = outer_radius;
 324     radial->cdx = pixman_fixed_to_double (radial->c2.x - radial->c1.x);
 325     radial->cdy = pixman_fixed_to_double (radial->c2.y - radial->c1.y);
 326     radial->dr = pixman_fixed_to_double (radial->c2.radius - radial->c1.radius);
 327     radial->A = (radial->cdx * radial->cdx
 328                  + radial->cdy * radial->cdy
 329                  - radial->dr  * radial->dr);
 330
 331     return image;
 332 }
 333
 334 PIXMAN_EXPORT pixman_image_t *
 335 pixman_image_create_conical_gradient (pixman_point_fixed_t *center,
 336                                       pixman_fixed_t angle,
 337                                       const pixman_gradient_stop_t *stops,
 338                                       int n_stops)
 339 {
 340     pixman_image_t *image = allocate_image();
 341     conical_gradient_t *conical;
 342
 343     if (!image)
 344         return NULL;
 345
 346     conical = &image->conical;
 347
 348     if (!init_gradient (&conical->common, stops, n_stops))
 349     {
 350         free (image);
 351         return NULL;
 352     }
 353
 354     image->type = CONICAL;
 355     conical->center = *center;
 356     conical->angle = angle;
 357
 358     return image;
 359 }
 360
 361 static uint32_t *
 362 create_bits (pixman_format_code_t format,
 363              int                  width,
 364              int                  height,
 365              int                 *rowstride_bytes)
 366 {
 367     int stride;
 368     int buf_size;
 369     int bpp;
 370
 371     /* what follows is a long-winded way, avoiding any possibility of integer
 372      * overflows, of saying:
 373      * stride = ((width * bpp + FB_MASK) >> FB_SHIFT) * sizeof (uint32_t);
 374      */
 375
 376     bpp = PIXMAN_FORMAT_BPP (format);
 377     if (pixman_multiply_overflows_int (width, bpp))
 378         return NULL;
 379
 380     stride = width * bpp;
 381     if (pixman_addition_overflows_int (stride, FB_MASK))
 382         return NULL;
 383
 384     stride += FB_MASK;
 385     stride >>= FB_SHIFT;
 386
 387 #if FB_SHIFT < 2
 388     if (pixman_multiply_overflows_int (stride, sizeof (uint32_t)))
 389         return NULL;
 390 #endif
 391     stride *= sizeof (uint32_t);
 392
 393     if (pixman_multiply_overflows_int (height, stride))
 394         return NULL;
 395
 396     buf_size = height * stride;
 397
 398     if (rowstride_bytes)
 399         *rowstride_bytes = stride;
 400
 401     return calloc (buf_size, 1);
 402 }
 403
 404 static void
 405 reset_clip_region (pixman_image_t *image)
 406 {
 407     pixman_region32_fini (&image->common.clip_region);
 408
 409     if (image->type == BITS)
 410     {
 411         pixman_region32_init_rect (&image->common.clip_region, 0, 0,
 412                                    image->bits.width, image->bits.height);
 413     }
 414     else
 415     {
 416         pixman_region32_init (&image->common.clip_region);
 417     }
 418 }
 419
 420 PIXMAN_EXPORT pixman_image_t *
 421 pixman_image_create_bits (pixman_format_code_t  format,
 422                           int                   width,
 423                           int                   height,
 424                           uint32_t             *bits,
 425                           int                   rowstride_bytes)
 426 {
 427     pixman_image_t *image;
 428     uint32_t *free_me = NULL;
 429
 430     /* must be a whole number of uint32_t's
 431      */
 432     return_val_if_fail (bits == NULL ||
 433                         (rowstride_bytes % sizeof (uint32_t)) == 0, NULL);
 434
 435     if (!bits && width && height)
 436     {
 437         free_me = bits = create_bits (format, width, height, &rowstride_bytes);
 438         if (!bits)
 439             return NULL;
 440     }
 441
 442     image = allocate_image();
 443
 444     if (!image) {
 445         if (free_me)
 446             free (free_me);
 447         return NULL;
 448     }
 449
 450     image->type = BITS;
 451     image->bits.format = format;
 452     image->bits.width = width;
 453     image->bits.height = height;
 454     image->bits.bits = bits;
 455     image->bits.free_me = free_me;
 456
 457     image->bits.rowstride = rowstride_bytes / (int) sizeof (uint32_t); /* we store it in number
 458                                                                   * of uint32_t's
 459                                                                   */
 460     image->bits.indexed = NULL;
 461
 462     pixman_region32_fini (&image->common.full_region);
 463     pixman_region32_init_rect (&image->common.full_region, 0, 0,
 464                                image->bits.width, image->bits.height);
 465
 466     reset_clip_region (image);
 467     return image;
 468 }
 469
 470 PIXMAN_EXPORT pixman_bool_t
 471 pixman_image_set_clip_region32 (pixman_image_t *image,
 472                                 pixman_region32_t *region)
 473 {
 474     image_common_t *common = (image_common_t *)image;
 475
 476     if (region)
 477     {
 478         return pixman_region32_copy (&common->clip_region, region);
 479     }
 480     else
 481     {
 482         reset_clip_region (image);
 483
 484         return TRUE;
 485     }
 486 }
 487
 488
 489 PIXMAN_EXPORT pixman_bool_t
 490 pixman_image_set_clip_region (pixman_image_t    *image,
 491                               pixman_region16_t *region)
 492 {
 493     image_common_t *common = (image_common_t *)image;
 494
 495     if (region)
 496     {
 497         return pixman_region32_copy_from_region16 (&common->clip_region, region);
 498     }
 499     else
 500     {
 501         reset_clip_region (image);
 502
 503         return TRUE;
 504     }
 505 }
 506
 507 /* Sets whether the clip region includes a clip region set by the client
 508  */
 509 PIXMAN_EXPORT void
 510 pixman_image_set_has_client_clip (pixman_image_t *image,
 511                                   pixman_bool_t   client_clip)
 512 {
 513     image->common.has_client_clip = client_clip;
 514 }
 515
 516 PIXMAN_EXPORT pixman_bool_t
 517 pixman_image_set_transform (pixman_image_t           *image,
 518                             const pixman_transform_t *transform)
 519 {
 520     static const pixman_transform_t id =
 521     {
 522         { { pixman_fixed_1, 0, 0 },
 523           { 0, pixman_fixed_1, 0 },
 524           { 0, 0, pixman_fixed_1 }
 525         }
 526     };
 527
 528     image_common_t *common = (image_common_t *)image;
 529
 530     if (common->transform == transform)
 531         return TRUE;
 532
 533     if (memcmp (&id, transform, sizeof (pixman_transform_t)) == 0)
 534     {
 535         free(common->transform);
 536         common->transform = NULL;
 537         return TRUE;
 538     }
 539
 540     if (common->transform == NULL)
 541         common->transform = malloc (sizeof (pixman_transform_t));
 542     if (common->transform == NULL)
 543         return FALSE;
 544
 545     memcpy(common->transform, transform, sizeof(pixman_transform_t));
 546
 547     return TRUE;
 548 }
 549
 550 PIXMAN_EXPORT void
 551 pixman_image_set_repeat (pixman_image_t  *image,
 552                          pixman_repeat_t  repeat)
 553 {
 554     image->common.repeat = repeat;
 555 }
 556
 557 PIXMAN_EXPORT pixman_bool_t
 558 pixman_image_set_filter (pixman_image_t       *image,
 559                          pixman_filter_t       filter,
 560                          const pixman_fixed_t *params,
 561                          int                   n_params)
 562 {
 563     image_common_t *common = (image_common_t *)image;
 564     pixman_fixed_t *new_params;
 565
 566     if (params == common->filter_params && filter == common->filter)
 567         return TRUE;
 568
 569     new_params = NULL;
 570     if (params)
 571     {
 572         new_params = pixman_malloc_ab (n_params, sizeof (pixman_fixed_t));
 573         if (!new_params)
 574             return FALSE;
 575
 576         memcpy (new_params,
 577                 params, n_params * sizeof (pixman_fixed_t));
 578     }
 579
 580     common->filter = filter;
 581
 582     if (common->filter_params)
 583         free (common->filter_params);
 584
 585     common->filter_params = new_params;
 586     common->n_filter_params = n_params;
 587     return TRUE;
 588 }
 589
 590 PIXMAN_EXPORT void
 591 pixman_image_set_source_clipping (pixman_image_t  *image,
 592                                   pixman_bool_t    source_clipping)
 593 {
 594     image_common_t *common = &image->common;
 595
 596     if (source_clipping)
 597         common->src_clip = &common->clip_region;
 598     else
 599         common->src_clip = &common->full_region;
 600 }
 601
 602 /* Unlike all the other property setters, this function does not
 603  * copy the content of indexed. Doing this copying is simply
 604  * way, way too expensive.
 605  */
 606 PIXMAN_EXPORT void
 607 pixman_image_set_indexed (pixman_image_t         *image,
 608                           const pixman_indexed_t *indexed)
 609 {
 610     bits_image_t *bits = (bits_image_t *)image;
 611
 612     bits->indexed = indexed;
 613 }
 614
 615 PIXMAN_EXPORT void
 616 pixman_image_set_alpha_map (pixman_image_t *image,
 617                             pixman_image_t *alpha_map,
 618                             int16_t         x,
 619                             int16_t         y)
 620 {
 621     image_common_t *common = (image_common_t *)image;
 622
 623     return_if_fail (!alpha_map || alpha_map->type == BITS);
 624
 625     if (common->alpha_map != (bits_image_t *)alpha_map)
 626     {
 627         if (common->alpha_map)
 628             pixman_image_unref ((pixman_image_t *)common->alpha_map);
 629
 630         if (alpha_map)
 631             common->alpha_map = (bits_image_t *)pixman_image_ref (alpha_map);
 632         else
 633             common->alpha_map = NULL;
 634     }
 635
 636     common->alpha_origin.x = x;
 637     common->alpha_origin.y = y;
 638 }
 639
 640 PIXMAN_EXPORT void
 641 pixman_image_set_component_alpha   (pixman_image_t       *image,
 642                                     pixman_bool_t         component_alpha)
 643 {
 644     image->common.component_alpha = component_alpha;
 645 }
 646
 647
 648 PIXMAN_EXPORT void
 649 pixman_image_set_accessors (pixman_image_t             *image,
 650                             pixman_read_memory_func_t   read_func,
 651                             pixman_write_memory_func_t  write_func)
 652 {
 653     return_if_fail (image != NULL);
 654
 655     image->common.read_func = read_func;
 656     image->common.write_func = write_func;
 657 }
 658
 659 PIXMAN_EXPORT uint32_t *
 660 pixman_image_get_data (pixman_image_t *image)
 661 {
 662     if (image->type == BITS)
 663         return image->bits.bits;
 664
 665     return NULL;
 666 }
 667
 668 PIXMAN_EXPORT int
 669 pixman_image_get_width (pixman_image_t *image)
 670 {
 671     if (image->type == BITS)
 672         return image->bits.width;
 673
 674     return 0;
 675 }
 676
 677 PIXMAN_EXPORT int
 678 pixman_image_get_height (pixman_image_t *image)
 679 {
 680     if (image->type == BITS)
 681         return image->bits.height;
 682
 683     return 0;
 684 }
 685
 686 PIXMAN_EXPORT int
 687 pixman_image_get_stride (pixman_image_t *image)
 688 {
 689     if (image->type == BITS)
 690         return image->bits.rowstride * (int) sizeof (uint32_t);
 691
 692     return 0;
 693 }
 694
 695 PIXMAN_EXPORT int
 696 pixman_image_get_depth (pixman_image_t *image)
 697 {
 698     if (image->type == BITS)
 699         return PIXMAN_FORMAT_DEPTH (image->bits.format);
 700
 701     return 0;
 702 }
 703
 704 static pixman_bool_t
 705 color_to_pixel (pixman_color_t *color,
 706                 uint32_t       *pixel,
 707                 pixman_format_code_t format)
 708 {
 709     uint32_t c = color_to_uint32 (color);
 710
 711     if (!(format == PIXMAN_a8r8g8b8     ||
 712           format == PIXMAN_x8r8g8b8     ||
 713           format == PIXMAN_a8b8g8r8     ||
 714           format == PIXMAN_x8b8g8r8     ||
 715           format == PIXMAN_b8g8r8a8     ||
 716           format == PIXMAN_b8g8r8x8     ||
 717           format == PIXMAN_r5g6b5       ||
 718           format == PIXMAN_b5g6r5       ||
 719           format == PIXMAN_a8))
 720     {
 721         return FALSE;
 722     }
 723
 724     if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_ABGR)
 725     {
 726         c = ((c & 0xff000000) >>  0) |
 727             ((c & 0x00ff0000) >> 16) |
 728             ((c & 0x0000ff00) >>  0) |
 729             ((c & 0x000000ff) << 16);
 730     }
 731     if (PIXMAN_FORMAT_TYPE (format) == PIXMAN_TYPE_BGRA)
 732     {
 733         c = ((c & 0xff000000) >> 24) |
 734             ((c & 0x00ff0000) >>  8) |
 735             ((c & 0x0000ff00) <<  8) |
 736             ((c & 0x000000ff) << 24);
 737     }
 738
 739     if (format == PIXMAN_a8)
 740         c = c >> 24;
 741     else if (format == PIXMAN_r5g6b5 ||
 742              format == PIXMAN_b5g6r5)
 743         c = cvt8888to0565 (c);
 744
 745 #if 0
 746     printf ("color: %x %x %x %x\n", color->alpha, color->red, color->green, color->blue);
 747     printf ("pixel: %x\n", c);
 748 #endif
 749
 750     *pixel = c;
 751     return TRUE;
 752 }
 753
 754 PIXMAN_EXPORT pixman_bool_t
 755 pixman_image_fill_rectangles (pixman_op_t                   op,
 756                               pixman_image_t               *dest,
 757                               pixman_color_t               *color,
 758                               int                           n_rects,
 759                               const pixman_rectangle16_t   *rects)
 760 {
 761     pixman_image_t *solid;
 762     pixman_color_t c;
 763     int i;
 764
 765     if (color->alpha == 0xffff)
 766     {
 767         if (op == PIXMAN_OP_OVER)
 768             op = PIXMAN_OP_SRC;
 769     }
 770
 771     if (op == PIXMAN_OP_CLEAR)
 772     {
 773         c.red = 0;
 774         c.green = 0;
 775         c.blue = 0;
 776         c.alpha = 0;
 777
 778         color = &c;
 779
 780         op = PIXMAN_OP_SRC;
 781     }
 782
 783     if (op == PIXMAN_OP_SRC)
 784     {
 785         uint32_t pixel;
 786
 787         if (color_to_pixel (color, &pixel, dest->bits.format))
 788         {
 789             for (i = 0; i < n_rects; ++i)
 790             {
 791                 pixman_region32_t fill_region;
 792                 int n_boxes, j;
 793                 pixman_box32_t *boxes;
 794
 795                 pixman_region32_init_rect (&fill_region, rects[i].x, rects[i].y, rects[i].width, rects[i].height);
 796                 if (!pixman_region32_intersect (&fill_region,
 797                                                 &fill_region,
 798                                                 &dest->common.clip_region))
 799                     return FALSE;
 800
 801
 802                 boxes = pixman_region32_rectangles (&fill_region, &n_boxes);
 803                 for (j = 0; j < n_boxes; ++j)
 804                 {
 805                     const pixman_box32_t *box = &(boxes[j]);
 806                     pixman_fill (dest->bits.bits, dest->bits.rowstride, PIXMAN_FORMAT_BPP (dest->bits.format),
 807                                  box->x1, box->y1, box->x2 - box->x1, box->y2 - box->y1,
 808                                  pixel);
 809                 }
 810
 811                 pixman_region32_fini (&fill_region);
 812             }
 813             return TRUE;
 814         }
 815     }
 816
 817     solid = pixman_image_create_solid_fill (color);
 818     if (!solid)
 819         return FALSE;
 820
 821     for (i = 0; i < n_rects; ++i)
 822     {
 823         const pixman_rectangle16_t *rect = &(rects[i]);
 824
 825         pixman_image_composite (op, solid, NULL, dest,
 826                                 0, 0, 0, 0,
 827                                 rect->x, rect->y,
 828                                 rect->width, rect->height);
 829     }
 830
 831     pixman_image_unref (solid);
 832
 833     return TRUE;
 834 }
 835
 836 pixman_bool_t
 837 pixman_image_can_get_solid (pixman_image_t *image)
 838 {
 839     if (image->type == SOLID)
 840         return TRUE;
 841
 842     if (image->type != BITS     ||
 843         image->bits.width != 1  ||
 844         image->bits.height != 1)
 845     {
 846         return FALSE;
 847     }
 848
 849     if (image->common.repeat != PIXMAN_REPEAT_NORMAL)
 850         return FALSE;
 851
 852     switch (image->bits.format)
 853     {
 854     case PIXMAN_a8r8g8b8:
 855     case PIXMAN_x8r8g8b8:
 856     case PIXMAN_a8b8g8r8:
 857     case PIXMAN_x8b8g8r8:
 858     case PIXMAN_b8g8r8a8:
 859     case PIXMAN_b8g8r8x8:
 860     case PIXMAN_r8g8b8:
 861     case PIXMAN_b8g8r8:
 862     case PIXMAN_r5g6b5:
 863     case PIXMAN_b5g6r5:
 864         return TRUE;
 865     default:
 866         return FALSE;
 867     }
 868 }
 869
 870 pixman_bool_t
 871 pixman_image_is_opaque(pixman_image_t *image)
 872 {
 873     int i = 0;
 874     int gradientNumberOfColors = 0;
 875
 876     if(image->common.alpha_map)
 877         return FALSE;
 878
 879     switch(image->type)
 880     {
 881     case BITS:
 882         if(PIXMAN_FORMAT_A(image->bits.format))
 883             return FALSE;
 884         break;
 885
 886     case LINEAR:
 887     case CONICAL:
 888     case RADIAL:
 889         gradientNumberOfColors = image->gradient.n_stops;
 890         i=0;
 891         while(i<gradientNumberOfColors)
 892         {
 893             if(image->gradient.stops[i].color.alpha != 0xffff)
 894                 return FALSE;
 895             i++;
 896         }
 897         break;
 898
 899     case SOLID:
 900          if(Alpha(image->solid.color) != 0xff)
 901             return FALSE;
 902         break;
 903     }
 904
 905     /* Convolution filters can introduce translucency if the sum of the weights
 906        is lower than 1. */
 907     if (image->common.filter == PIXMAN_FILTER_CONVOLUTION)
 908          return FALSE;
 909
 910     if (image->common.repeat == PIXMAN_REPEAT_NONE)
 911     {
 912         if (image->common.filter != PIXMAN_FILTER_NEAREST)
 913             return FALSE;
 914
 915         if (image->common.transform)
 916             return FALSE;
 917
 918         /* Gradients do not necessarily cover the entire compositing area */
 919         if (image->type == LINEAR || image->type == CONICAL || image->type == RADIAL)
 920             return FALSE;
 921     }
 922
 923      return TRUE;
 924 }