pixman/pixman-private.h

   1 #ifndef PACKAGE
   2 #  error config.h must be included before pixman-private.h
   3 #endif
   4
   5 #ifndef PIXMAN_PRIVATE_H
   6 #define PIXMAN_PRIVATE_H
   7
   8 #define PIXMAN_DISABLE_DEPRECATED
   9 #define PIXMAN_USE_INTERNAL_API
  10
  11 #include "pixman.h"
  12 #include <time.h>
  13 #include <assert.h>
  14
  15 #include "pixman-compiler.h"
  16
  17 /*
  18  * Images
  19  */
  20 typedef struct image_common image_common_t;
  21 typedef struct source_image source_image_t;
  22 typedef struct solid_fill solid_fill_t;
  23 typedef struct gradient gradient_t;
  24 typedef struct linear_gradient linear_gradient_t;
  25 typedef struct horizontal_gradient horizontal_gradient_t;
  26 typedef struct vertical_gradient vertical_gradient_t;
  27 typedef struct conical_gradient conical_gradient_t;
  28 typedef struct radial_gradient radial_gradient_t;
  29 typedef struct bits_image bits_image_t;
  30 typedef struct circle circle_t;
  31
  32 typedef void (*fetch_scanline_t) (pixman_image_t *image,
  33                                   int             x,
  34                                   int             y,
  35                                   int             width,
  36                                   uint32_t       *buffer,
  37                                   const uint32_t *mask,
  38                                   uint32_t        mask_bits);
  39
  40 typedef uint32_t (*fetch_pixel_32_t) (bits_image_t *image,
  41                                       int           x,
  42                                       int           y);
  43
  44 typedef uint64_t (*fetch_pixel_64_t) (bits_image_t *image,
  45                                       int           x,
  46                                       int           y);
  47
  48 typedef void (*store_scanline_t) (bits_image_t *  image,
  49                                   int             x,
  50                                   int             y,
  51                                   int             width,
  52                                   const uint32_t *values);
  53
  54 typedef enum
  55 {
  56     BITS,
  57     LINEAR,
  58     CONICAL,
  59     RADIAL,
  60     SOLID
  61 } image_type_t;
  62
  63 typedef enum
  64 {
  65     SOURCE_IMAGE_CLASS_UNKNOWN,
  66     SOURCE_IMAGE_CLASS_HORIZONTAL,
  67     SOURCE_IMAGE_CLASS_VERTICAL,
  68 } source_image_class_t;
  69
  70 typedef source_image_class_t (*classify_func_t) (pixman_image_t *image,
  71                                                 int             x,
  72                                                 int             y,
  73                                                 int             width,
  74                                                 int             height);
  75 typedef void (*property_changed_func_t) (pixman_image_t *image);
  76
  77 struct image_common
  78 {
  79     image_type_t                type;
  80     int32_t                     ref_count;
  81     pixman_region32_t           clip_region;
  82     pixman_bool_t               have_clip_region;   /* FALSE if there is no clip */
  83     pixman_bool_t               client_clip;        /* Whether the source clip was
  84                                                        set by a client */
  85     pixman_bool_t               clip_sources;       /* Whether the clip applies when
  86                                                      * the image is used as a source
  87                                                      */
  88     pixman_bool_t               dirty;
  89     pixman_bool_t               need_workaround;
  90     pixman_transform_t *        transform;
  91     pixman_repeat_t             repeat;
  92     pixman_filter_t             filter;
  93     pixman_fixed_t *            filter_params;
  94     int                         n_filter_params;
  95     bits_image_t *              alpha_map;
  96     int                         alpha_origin_x;
  97     int                         alpha_origin_y;
  98     pixman_bool_t               component_alpha;
  99     classify_func_t             classify;
 100     property_changed_func_t     property_changed;
 101     fetch_scanline_t            get_scanline_32;
 102     fetch_scanline_t            get_scanline_64;
 103
 104     pixman_image_destroy_func_t destroy_func;
 105     void *                      destroy_data;
 106 };
 107
 108 struct source_image
 109 {
 110     image_common_t common;
 111     source_image_class_t class;
 112 };
 113
 114 struct solid_fill
 115 {
 116     source_image_t common;
 117     uint32_t       color;    /* FIXME: shouldn't this be a pixman_color_t? */
 118 };
 119
 120 struct gradient
 121 {
 122     source_image_t          common;
 123     int                     n_stops;
 124     pixman_gradient_stop_t *stops;
 125     int                     stop_range;
 126 };
 127
 128 struct linear_gradient
 129 {
 130     gradient_t           common;
 131     pixman_point_fixed_t p1;
 132     pixman_point_fixed_t p2;
 133 };
 134
 135 struct circle
 136 {
 137     pixman_fixed_t x;
 138     pixman_fixed_t y;
 139     pixman_fixed_t radius;
 140 };
 141
 142 struct radial_gradient
 143 {
 144     gradient_t common;
 145
 146     circle_t   c1;
 147     circle_t   c2;
 148     double     cdx;
 149     double     cdy;
 150     double     dr;
 151     double     A;
 152 };
 153
 154 struct conical_gradient
 155 {
 156     gradient_t           common;
 157     pixman_point_fixed_t center;
 158     pixman_fixed_t       angle;
 159 };
 160
 161 struct bits_image
 162 {
 163     image_common_t             common;
 164     pixman_format_code_t       format;
 165     const pixman_indexed_t *   indexed;
 166     int                        width;
 167     int                        height;
 168     uint32_t *                 bits;
 169     uint32_t *                 free_me;
 170     int                        rowstride;  /* in number of uint32_t's */
 171
 172     /* Fetch a pixel, disregarding alpha maps, transformations etc. */
 173     fetch_pixel_32_t           fetch_pixel_raw_32;
 174     fetch_pixel_64_t           fetch_pixel_raw_64;
 175
 176     /* Fetch a pixel, taking alpha maps into account */
 177     fetch_pixel_32_t           fetch_pixel_32;
 178     fetch_pixel_64_t           fetch_pixel_64;
 179
 180     /* Fetch raw scanlines, with no regard for transformations, alpha maps etc. */
 181     fetch_scanline_t           fetch_scanline_raw_32;
 182     fetch_scanline_t           fetch_scanline_raw_64;
 183
 184     /* Store scanlines with no regard for alpha maps */
 185     store_scanline_t           store_scanline_raw_32;
 186     store_scanline_t           store_scanline_raw_64;
 187
 188     /* Store a scanline, taking alpha maps into account */
 189     store_scanline_t           store_scanline_32;
 190     store_scanline_t           store_scanline_64;
 191
 192     /* Used for indirect access to the bits */
 193     pixman_read_memory_func_t  read_func;
 194     pixman_write_memory_func_t write_func;
 195 };
 196
 197 union pixman_image
 198 {
 199     image_type_t       type;
 200     image_common_t     common;
 201     bits_image_t       bits;
 202     source_image_t     source;
 203     gradient_t         gradient;
 204     linear_gradient_t  linear;
 205     conical_gradient_t conical;
 206     radial_gradient_t  radial;
 207     solid_fill_t       solid;
 208 };
 209
 210
 211 void
 212 _pixman_bits_image_setup_raw_accessors (bits_image_t *image);
 213
 214 void
 215 _pixman_image_get_scanline_generic_64  (pixman_image_t *image,
 216                                         int             x,
 217                                         int             y,
 218                                         int             width,
 219                                         uint32_t *      buffer,
 220                                         const uint32_t *mask,
 221                                         uint32_t        mask_bits);
 222
 223 source_image_class_t
 224 _pixman_image_classify (pixman_image_t *image,
 225                         int             x,
 226                         int             y,
 227                         int             width,
 228                         int             height);
 229
 230 void
 231 _pixman_image_get_scanline_32 (pixman_image_t *image,
 232                                int             x,
 233                                int             y,
 234                                int             width,
 235                                uint32_t *      buffer,
 236                                const uint32_t *mask,
 237                                uint32_t        mask_bits);
 238
 239 /* Even thought the type of buffer is uint32_t *, the function actually expects
 240  * a uint64_t *buffer.
 241  */
 242 void
 243 _pixman_image_get_scanline_64 (pixman_image_t *image,
 244                                int             x,
 245                                int             y,
 246                                int             width,
 247                                uint32_t *      buffer,
 248                                const uint32_t *unused,
 249                                uint32_t        unused2);
 250
 251 void
 252 _pixman_image_store_scanline_32 (bits_image_t *  image,
 253                                  int             x,
 254                                  int             y,
 255                                  int             width,
 256                                  const uint32_t *buffer);
 257
 258 /* Even though the type of buffer is uint32_t *, the function
 259  * actually expects a uint64_t *buffer.
 260  */
 261 void
 262 _pixman_image_store_scanline_64 (bits_image_t *  image,
 263                                  int             x,
 264                                  int             y,
 265                                  int             width,
 266                                  const uint32_t *buffer);
 267
 268 pixman_image_t *
 269 _pixman_image_allocate (void);
 270
 271 pixman_bool_t
 272 _pixman_init_gradient (gradient_t *                  gradient,
 273                        const pixman_gradient_stop_t *stops,
 274                        int                           n_stops);
 275 void
 276 _pixman_image_reset_clip_region (pixman_image_t *image);
 277
 278 void
 279 _pixman_image_validate (pixman_image_t *image);
 280
 281 pixman_bool_t
 282 _pixman_image_is_opaque (pixman_image_t *image);
 283
 284 pixman_bool_t
 285 _pixman_image_is_solid (pixman_image_t *image);
 286
 287 uint32_t
 288 _pixman_image_get_solid (pixman_image_t *     image,
 289                          pixman_format_code_t format);
 290
 291 #define PIXMAN_IMAGE_GET_LINE(image, x, y, type, out_stride, line, mul) \
 292     do                                                                  \
 293     {                                                                   \
 294         uint32_t *__bits__;                                             \
 295         int       __stride__;                                           \
 296                                                                         \
 297         __bits__ = image->bits.bits;                                    \
 298         __stride__ = image->bits.rowstride;                             \
 299         (out_stride) =                                                  \
 300             __stride__ * (int) sizeof (uint32_t) / (int) sizeof (type); \
 301         (line) =                                                        \
 302             ((type *) __bits__) + (out_stride) * (y) + (mul) * (x);     \
 303     } while (0)
 304
 305 /*
 306  * Gradient walker
 307  */
 308 typedef struct
 309 {
 310     uint32_t                left_ag;
 311     uint32_t                left_rb;
 312     uint32_t                right_ag;
 313     uint32_t                right_rb;
 314     int32_t                 left_x;
 315     int32_t                 right_x;
 316     int32_t                 stepper;
 317
 318     pixman_gradient_stop_t *stops;
 319     int                     num_stops;
 320     unsigned int            spread;
 321
 322     int                     need_reset;
 323 } pixman_gradient_walker_t;
 324
 325 void
 326 _pixman_gradient_walker_init (pixman_gradient_walker_t *walker,
 327                               gradient_t *              gradient,
 328                               unsigned int              spread);
 329
 330 void
 331 _pixman_gradient_walker_reset (pixman_gradient_walker_t *walker,
 332                                pixman_fixed_32_32_t      pos);
 333
 334 uint32_t
 335 _pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker,
 336                                pixman_fixed_32_32_t      x);
 337
 338 /*
 339  * Edges
 340  */
 341
 342 #define MAX_ALPHA(n)    ((1 << (n)) - 1)
 343 #define N_Y_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) - 1)
 344 #define N_X_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) + 1)
 345
 346 #define STEP_Y_SMALL(n) (pixman_fixed_1 / N_Y_FRAC (n))
 347 #define STEP_Y_BIG(n)   (pixman_fixed_1 - (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 348
 349 #define Y_FRAC_FIRST(n) (STEP_Y_SMALL (n) / 2)
 350 #define Y_FRAC_LAST(n)  (Y_FRAC_FIRST (n) + (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 351
 352 #define STEP_X_SMALL(n) (pixman_fixed_1 / N_X_FRAC (n))
 353 #define STEP_X_BIG(n)   (pixman_fixed_1 - (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 354
 355 #define X_FRAC_FIRST(n) (STEP_X_SMALL (n) / 2)
 356 #define X_FRAC_LAST(n)  (X_FRAC_FIRST (n) + (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 357
 358 #define RENDER_SAMPLES_X(x, n)                                          \
 359     ((n) == 1? 0 : (pixman_fixed_frac (x) +                             \
 360                     X_FRAC_FIRST (n)) / STEP_X_SMALL (n))
 361
 362 void
 363 pixman_rasterize_edges_accessors (pixman_image_t *image,
 364                                   pixman_edge_t * l,
 365                                   pixman_edge_t * r,
 366                                   pixman_fixed_t  t,
 367                                   pixman_fixed_t  b);
 368
 369 /*
 370  * Implementations
 371  */
 372
 373 typedef struct pixman_implementation_t pixman_implementation_t;
 374
 375 typedef void (*pixman_combine_32_func_t) (pixman_implementation_t *imp,
 376                                           pixman_op_t              op,
 377                                           uint32_t *               dest,
 378                                           const uint32_t *         src,
 379                                           const uint32_t *         mask,
 380                                           int                      width);
 381
 382 typedef void (*pixman_combine_64_func_t) (pixman_implementation_t *imp,
 383                                           pixman_op_t              op,
 384                                           uint64_t *               dest,
 385                                           const uint64_t *         src,
 386                                           const uint64_t *         mask,
 387                                           int                      width);
 388
 389 typedef void (*pixman_composite_func_t) (pixman_implementation_t *imp,
 390                                          pixman_op_t              op,
 391                                          pixman_image_t *         src,
 392                                          pixman_image_t *         mask,
 393                                          pixman_image_t *         dest,
 394                                          int32_t                  src_x,
 395                                          int32_t                  src_y,
 396                                          int32_t                  mask_x,
 397                                          int32_t                  mask_y,
 398                                          int32_t                  dest_x,
 399                                          int32_t                  dest_y,
 400                                          int32_t                  width,
 401                                          int32_t                  height);
 402 typedef pixman_bool_t (*pixman_blt_func_t) (pixman_implementation_t *imp,
 403                                             uint32_t *               src_bits,
 404                                             uint32_t *               dst_bits,
 405                                             int                      src_stride,
 406                                             int                      dst_stride,
 407                                             int                      src_bpp,
 408                                             int                      dst_bpp,
 409                                             int                      src_x,
 410                                             int                      src_y,
 411                                             int                      dst_x,
 412                                             int                      dst_y,
 413                                             int                      width,
 414                                             int                      height);
 415 typedef pixman_bool_t (*pixman_fill_func_t) (pixman_implementation_t *imp,
 416                                              uint32_t *               bits,
 417                                              int                      stride,
 418                                              int                      bpp,
 419                                              int                      x,
 420                                              int                      y,
 421                                              int                      width,
 422                                              int                      height,
 423                                              uint32_t                 xor);
 424
 425 void _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp);
 426 void _pixman_setup_combiner_functions_64 (pixman_implementation_t *imp);
 427
 428 struct pixman_implementation_t
 429 {
 430     pixman_implementation_t *toplevel;
 431     pixman_implementation_t *delegate;
 432
 433     pixman_composite_func_t  composite;
 434     pixman_blt_func_t        blt;
 435     pixman_fill_func_t       fill;
 436
 437     pixman_combine_32_func_t combine_32[PIXMAN_N_OPERATORS];
 438     pixman_combine_32_func_t combine_32_ca[PIXMAN_N_OPERATORS];
 439     pixman_combine_64_func_t combine_64[PIXMAN_N_OPERATORS];
 440     pixman_combine_64_func_t combine_64_ca[PIXMAN_N_OPERATORS];
 441 };
 442
 443 pixman_implementation_t *
 444 _pixman_implementation_create (pixman_implementation_t *delegate);
 445
 446 void
 447 _pixman_implementation_combine_32 (pixman_implementation_t *imp,
 448                                    pixman_op_t              op,
 449                                    uint32_t *               dest,
 450                                    const uint32_t *         src,
 451                                    const uint32_t *         mask,
 452                                    int                      width);
 453 void
 454 _pixman_implementation_combine_64 (pixman_implementation_t *imp,
 455                                    pixman_op_t              op,
 456                                    uint64_t *               dest,
 457                                    const uint64_t *         src,
 458                                    const uint64_t *         mask,
 459                                    int                      width);
 460 void
 461 _pixman_implementation_combine_32_ca (pixman_implementation_t *imp,
 462                                       pixman_op_t              op,
 463                                       uint32_t *               dest,
 464                                       const uint32_t *         src,
 465                                       const uint32_t *         mask,
 466                                       int                      width);
 467 void
 468 _pixman_implementation_combine_64_ca (pixman_implementation_t *imp,
 469                                       pixman_op_t              op,
 470                                       uint64_t *               dest,
 471                                       const uint64_t *         src,
 472                                       const uint64_t *         mask,
 473                                       int                      width);
 474 void
 475 _pixman_implementation_composite (pixman_implementation_t *imp,
 476                                   pixman_op_t              op,
 477                                   pixman_image_t *         src,
 478                                   pixman_image_t *         mask,
 479                                   pixman_image_t *         dest,
 480                                   int32_t                  src_x,
 481                                   int32_t                  src_y,
 482                                   int32_t                  mask_x,
 483                                   int32_t                  mask_y,
 484                                   int32_t                  dest_x,
 485                                   int32_t                  dest_y,
 486                                   int32_t                  width,
 487                                   int32_t                  height);
 488
 489 pixman_bool_t
 490 _pixman_implementation_blt (pixman_implementation_t *imp,
 491                             uint32_t *               src_bits,
 492                             uint32_t *               dst_bits,
 493                             int                      src_stride,
 494                             int                      dst_stride,
 495                             int                      src_bpp,
 496                             int                      dst_bpp,
 497                             int                      src_x,
 498                             int                      src_y,
 499                             int                      dst_x,
 500                             int                      dst_y,
 501                             int                      width,
 502                             int                      height);
 503
 504 pixman_bool_t
 505 _pixman_implementation_fill (pixman_implementation_t *imp,
 506                              uint32_t *               bits,
 507                              int                      stride,
 508                              int                      bpp,
 509                              int                      x,
 510                              int                      y,
 511                              int                      width,
 512                              int                      height,
 513                              uint32_t                 xor);
 514
 515 /* Specific implementations */
 516 pixman_implementation_t *
 517 _pixman_implementation_create_general (void);
 518
 519 pixman_implementation_t *
 520 _pixman_implementation_create_fast_path (void);
 521
 522 #ifdef USE_MMX
 523 pixman_implementation_t *
 524 _pixman_implementation_create_mmx (void);
 525 #endif
 526
 527 #ifdef USE_SSE2
 528 pixman_implementation_t *
 529 _pixman_implementation_create_sse2 (void);
 530 #endif
 531
 532 #ifdef USE_ARM_SIMD
 533 pixman_implementation_t *
 534 _pixman_implementation_create_arm_simd (void);
 535 #endif
 536
 537 #ifdef USE_ARM_NEON
 538 pixman_implementation_t *
 539 _pixman_implementation_create_arm_neon (void);
 540 #endif
 541
 542 #ifdef USE_VMX
 543 pixman_implementation_t *
 544 _pixman_implementation_create_vmx (void);
 545 #endif
 546
 547 pixman_implementation_t *
 548 _pixman_choose_implementation (void);
 549
 550
 551
 552 /*
 553  * Utilities
 554  */
 555
 556 /* These "formats" all have depth 0, so they
 557  * will never clash with any real ones
 558  */
 559 #define PIXMAN_null             PIXMAN_FORMAT (0, 0, 0, 0, 0, 0)
 560 #define PIXMAN_solid            PIXMAN_FORMAT (0, 1, 0, 0, 0, 0)
 561 #define PIXMAN_a8r8g8b8_ca      PIXMAN_FORMAT (0, 2, 0, 0, 0, 0)
 562 #define PIXMAN_a8b8g8r8_ca      PIXMAN_FORMAT (0, 3, 0, 0, 0, 0)
 563 #define PIXMAN_pixbuf           PIXMAN_FORMAT (0, 4, 0, 0, 0, 0)
 564 #define PIXMAN_rpixbuf          PIXMAN_FORMAT (0, 5, 0, 0, 0, 0)
 565
 566 typedef struct
 567 {
 568     pixman_op_t             op;
 569     pixman_format_code_t    src_format;
 570     pixman_format_code_t    mask_format;
 571     pixman_format_code_t    dest_format;
 572     pixman_composite_func_t func;
 573 } pixman_fast_path_t;
 574
 575 /* Memory allocation helpers */
 576 void *
 577 pixman_malloc_ab (unsigned int n, unsigned int b);
 578
 579 void *
 580 pixman_malloc_abc (unsigned int a, unsigned int b, unsigned int c);
 581
 582 pixman_bool_t
 583 pixman_multiply_overflows_int (unsigned int a, unsigned int b);
 584
 585 pixman_bool_t
 586 pixman_addition_overflows_int (unsigned int a, unsigned int b);
 587
 588 /* Compositing utilities */
 589 pixman_bool_t
 590 _pixman_run_fast_path (const pixman_fast_path_t *paths,
 591                        pixman_implementation_t * imp,
 592                        pixman_op_t               op,
 593                        pixman_image_t *          src,
 594                        pixman_image_t *          mask,
 595                        pixman_image_t *          dest,
 596                        int32_t                   src_x,
 597                        int32_t                   src_y,
 598                        int32_t                   mask_x,
 599                        int32_t                   mask_y,
 600                        int32_t                   dest_x,
 601                        int32_t                   dest_y,
 602                        int32_t                   width,
 603                        int32_t                   height);
 604
 605 void
 606 _pixman_walk_composite_region (pixman_implementation_t *imp,
 607                                pixman_op_t              op,
 608                                pixman_image_t *         src_image,
 609                                pixman_image_t *         mask_image,
 610                                pixman_image_t *         dst_image,
 611                                int32_t                  src_x,
 612                                int32_t                  src_y,
 613                                int32_t                  mask_x,
 614                                int32_t                  mask_y,
 615                                int32_t                  dest_x,
 616                                int32_t                  dest_y,
 617                                int32_t                  width,
 618                                int32_t                  height,
 619                                pixman_composite_func_t  composite_rect);
 620
 621 void
 622 pixman_expand (uint64_t *           dst,
 623                const uint32_t *     src,
 624                pixman_format_code_t format,
 625                int                  width);
 626
 627 void
 628 pixman_contract (uint32_t *      dst,
 629                  const uint64_t *src,
 630                  int             width);
 631
 632
 633 /* Region Helpers */
 634 pixman_bool_t
 635 pixman_region32_copy_from_region16 (pixman_region32_t *dst,
 636                                     pixman_region16_t *src);
 637
 638 pixman_bool_t
 639 pixman_region16_copy_from_region32 (pixman_region16_t *dst,
 640                                     pixman_region32_t *src);
 641
 642
 643 /* Misc macros */
 644
 645 #ifndef FALSE
 646 #   define FALSE 0
 647 #endif
 648
 649 #ifndef TRUE
 650 #   define TRUE 1
 651 #endif
 652
 653 #ifndef MIN
 654 #  define MIN(a, b) ((a < b) ? a : b)
 655 #endif
 656
 657 #ifndef MAX
 658 #  define MAX(a, b) ((a > b) ? a : b)
 659 #endif
 660
 661 /* Integer division that rounds towards -infinity */
 662 #define DIV(a, b)                                          \
 663     ((((a) < 0) == ((b) < 0)) ? (a) / (b) :                \
 664      ((a) - (b) + 1 - (((b) < 0) << 1)) / (b))
 665
 666 /* Modulus that produces the remainder wrt. DIV */
 667 #define MOD(a, b) ((a) < 0 ? ((b) - ((-(a) - 1) % (b))) - 1 : (a) % (b))
 668
 669 #define CLIP(v, low, high) ((v) < (low) ? (low) : ((v) > (high) ? (high) : (v)))
 670
 671 /* Conversion between 8888 and 0565 */
 672
 673 #define CONVERT_8888_TO_0565(s)                                         \
 674     ((((s) >> 3) & 0x001f) |                                            \
 675      (((s) >> 5) & 0x07e0) |                                            \
 676      (((s) >> 8) & 0xf800))
 677
 678 #define CONVERT_0565_TO_0888(s)                                         \
 679     (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) |                       \
 680      ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) |                   \
 681      ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)))
 682
 683 #define PIXMAN_FORMAT_IS_WIDE(f)                                        \
 684     (PIXMAN_FORMAT_A (f) > 8 ||                                         \
 685      PIXMAN_FORMAT_R (f) > 8 ||                                         \
 686      PIXMAN_FORMAT_G (f) > 8 ||                                         \
 687      PIXMAN_FORMAT_B (f) > 8)
 688
 689 /*
 690  * Various debugging code
 691  */
 692
 693 #undef DEBUG
 694 #define DEBUG 0
 695
 696 #if DEBUG
 697
 698 #define return_if_fail(expr)                                            \
 699     do                                                                  \
 700     {                                                                   \
 701         if (!(expr))                                                    \
 702         {                                                               \
 703             fprintf (stderr, "In %s: %s failed\n", FUNC, # expr);       \
 704             return;                                                     \
 705         }                                                               \
 706     }                                                                   \
 707     while (0)
 708
 709 #define return_val_if_fail(expr, retval)                                \
 710     do                                                                  \
 711     {                                                                   \
 712         if (!(expr))                                                    \
 713         {                                                               \
 714             fprintf (stderr, "In %s: %s failed\n", FUNC, # expr);       \
 715             return (retval);                                            \
 716         }                                                               \
 717     }                                                                   \
 718     while (0)
 719
 720 #else
 721
 722 #define return_if_fail(expr)                                            \
 723     do                                                                  \
 724     {                                                                   \
 725         if (!(expr))                                                    \
 726             return;                                                     \
 727     }                                                                   \
 728     while (0)
 729
 730 #define return_val_if_fail(expr, retval)                                \
 731     do                                                                  \
 732     {                                                                   \
 733         if (!(expr))                                                    \
 734             return (retval);                                            \
 735     }                                                                   \
 736     while (0)
 737
 738 #endif
 739
 740 /*
 741  * Timers
 742  */
 743
 744 #ifdef PIXMAN_TIMERS
 745
 746 static inline uint64_t
 747 oil_profile_stamp_rdtsc (void)
 748 {
 749     uint64_t ts;
 750
 751     __asm__ __volatile__ ("rdtsc\n" : "=A" (ts));
 752     return ts;
 753 }
 754
 755 #define OIL_STAMP oil_profile_stamp_rdtsc
 756
 757 typedef struct pixman_timer_t pixman_timer_t;
 758
 759 struct pixman_timer_t
 760 {
 761     int             initialized;
 762     const char *    name;
 763     uint64_t        n_times;
 764     uint64_t        total;
 765     pixman_timer_t *next;
 766 };
 767
 768 extern int timer_defined;
 769
 770 void pixman_timer_register (pixman_timer_t *timer);
 771
 772 #define TIMER_BEGIN(tname)                                              \
 773     {                                                                   \
 774         static pixman_timer_t timer ## tname;                           \
 775         uint64_t              begin ## tname;                           \
 776                                                                         \
 777         if (!timer ## tname.initialized)                                \
 778         {                                                               \
 779             timer ## tname.initialized = 1;                             \
 780             timer ## tname.name = # tname;                              \
 781             pixman_timer_register (&timer ## tname);                    \
 782         }                                                               \
 783                                                                         \
 784         timer ## tname.n_times++;                                       \
 785         begin ## tname = OIL_STAMP ();
 786
 787 #define TIMER_END(tname)                                                \
 788     timer ## tname.total += OIL_STAMP () - begin ## tname;              \
 789     }
 790
 791 #endif /* PIXMAN_TIMERS */
 792
 793 #endif /* PIXMAN_PRIVATE_H */