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 #include <stdio.h>
  15 #include <string.h>
  16
  17 #include "pixman-compiler.h"
  18
  19 /*
  20  * Images
  21  */
  22 typedef struct image_common image_common_t;
  23 typedef struct source_image source_image_t;
  24 typedef struct solid_fill solid_fill_t;
  25 typedef struct gradient gradient_t;
  26 typedef struct linear_gradient linear_gradient_t;
  27 typedef struct horizontal_gradient horizontal_gradient_t;
  28 typedef struct vertical_gradient vertical_gradient_t;
  29 typedef struct conical_gradient conical_gradient_t;
  30 typedef struct radial_gradient radial_gradient_t;
  31 typedef struct bits_image bits_image_t;
  32 typedef struct circle circle_t;
  33
  34 typedef void (*fetch_scanline_t) (pixman_image_t *image,
  35                                   int             x,
  36                                   int             y,
  37                                   int             width,
  38                                   uint32_t       *buffer,
  39                                   const uint32_t *mask);
  40
  41 typedef uint32_t (*fetch_pixel_32_t) (bits_image_t *image,
  42                                       int           x,
  43                                       int           y);
  44
  45 typedef uint64_t (*fetch_pixel_64_t) (bits_image_t *image,
  46                                       int           x,
  47                                       int           y);
  48
  49 typedef void (*store_scanline_t) (bits_image_t *  image,
  50                                   int             x,
  51                                   int             y,
  52                                   int             width,
  53                                   const uint32_t *values);
  54
  55 typedef enum
  56 {
  57     BITS,
  58     LINEAR,
  59     CONICAL,
  60     RADIAL,
  61     SOLID
  62 } image_type_t;
  63
  64 typedef enum
  65 {
  66     SOURCE_IMAGE_CLASS_UNKNOWN,
  67     SOURCE_IMAGE_CLASS_HORIZONTAL,
  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     int32_t                     alpha_count;        /* How many times this image is being used as an alpha map */
  83     pixman_bool_t               have_clip_region;   /* FALSE if there is no clip */
  84     pixman_bool_t               client_clip;        /* Whether the source clip was
  85                                                        set by a client */
  86     pixman_bool_t               clip_sources;       /* Whether the clip applies when
  87                                                      * the image is used as a source
  88                                                      */
  89     pixman_bool_t               dirty;
  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     uint32_t                    flags;
 108     pixman_format_code_t        extended_format_code;
 109 };
 110
 111 struct source_image
 112 {
 113     image_common_t common;
 114 };
 115
 116 struct solid_fill
 117 {
 118     source_image_t common;
 119     pixman_color_t color;
 120
 121     uint32_t       color_32;
 122     uint64_t       color_64;
 123 };
 124
 125 struct gradient
 126 {
 127     source_image_t          common;
 128     int                     n_stops;
 129     pixman_gradient_stop_t *stops;
 130     int                     stop_range;
 131 };
 132
 133 struct linear_gradient
 134 {
 135     gradient_t           common;
 136     pixman_point_fixed_t p1;
 137     pixman_point_fixed_t p2;
 138 };
 139
 140 struct circle
 141 {
 142     pixman_fixed_t x;
 143     pixman_fixed_t y;
 144     pixman_fixed_t radius;
 145 };
 146
 147 struct radial_gradient
 148 {
 149     gradient_t common;
 150
 151     circle_t   c1;
 152     circle_t   c2;
 153
 154     circle_t   delta;
 155     double     a;
 156     double     inva;
 157     double     mindr;
 158 };
 159
 160 struct conical_gradient
 161 {
 162     gradient_t           common;
 163     pixman_point_fixed_t center;
 164     double               angle;
 165 };
 166
 167 struct bits_image
 168 {
 169     image_common_t             common;
 170     pixman_format_code_t       format;
 171     const pixman_indexed_t *   indexed;
 172     int                        width;
 173     int                        height;
 174     uint32_t *                 bits;
 175     uint32_t *                 free_me;
 176     int                        rowstride;  /* in number of uint32_t's */
 177
 178     fetch_scanline_t           fetch_scanline_32;
 179     fetch_pixel_32_t           fetch_pixel_32;
 180     store_scanline_t           store_scanline_32;
 181
 182     fetch_scanline_t           fetch_scanline_64;
 183     fetch_pixel_64_t           fetch_pixel_64;
 184     store_scanline_t           store_scanline_64;
 185
 186     /* Used for indirect access to the bits */
 187     pixman_read_memory_func_t  read_func;
 188     pixman_write_memory_func_t write_func;
 189 };
 190
 191 union pixman_image
 192 {
 193     image_type_t       type;
 194     image_common_t     common;
 195     bits_image_t       bits;
 196     source_image_t     source;
 197     gradient_t         gradient;
 198     linear_gradient_t  linear;
 199     conical_gradient_t conical;
 200     radial_gradient_t  radial;
 201     solid_fill_t       solid;
 202 };
 203
 204 void
 205 _pixman_bits_image_setup_accessors (bits_image_t *image);
 206
 207 void
 208 _pixman_image_get_scanline_generic_64  (pixman_image_t *image,
 209                                         int             x,
 210                                         int             y,
 211                                         int             width,
 212                                         uint32_t *      buffer,
 213                                         const uint32_t *mask);
 214
 215 source_image_class_t
 216 _pixman_image_classify (pixman_image_t *image,
 217                         int             x,
 218                         int             y,
 219                         int             width,
 220                         int             height);
 221
 222 void
 223 _pixman_image_get_scanline_32 (pixman_image_t *image,
 224                                int             x,
 225                                int             y,
 226                                int             width,
 227                                uint32_t *      buffer,
 228                                const uint32_t *mask);
 229
 230 /* Even thought the type of buffer is uint32_t *, the function actually expects
 231  * a uint64_t *buffer.
 232  */
 233 void
 234 _pixman_image_get_scanline_64 (pixman_image_t *image,
 235                                int             x,
 236                                int             y,
 237                                int             width,
 238                                uint32_t *      buffer,
 239                                const uint32_t *unused);
 240
 241 void
 242 _pixman_image_store_scanline_32 (bits_image_t *  image,
 243                                  int             x,
 244                                  int             y,
 245                                  int             width,
 246                                  const uint32_t *buffer);
 247
 248 /* Even though the type of buffer is uint32_t *, the function
 249  * actually expects a uint64_t *buffer.
 250  */
 251 void
 252 _pixman_image_store_scanline_64 (bits_image_t *  image,
 253                                  int             x,
 254                                  int             y,
 255                                  int             width,
 256                                  const uint32_t *buffer);
 257
 258 pixman_image_t *
 259 _pixman_image_allocate (void);
 260
 261 pixman_bool_t
 262 _pixman_init_gradient (gradient_t *                  gradient,
 263                        const pixman_gradient_stop_t *stops,
 264                        int                           n_stops);
 265 void
 266 _pixman_image_reset_clip_region (pixman_image_t *image);
 267
 268 void
 269 _pixman_image_validate (pixman_image_t *image);
 270
 271 uint32_t
 272 _pixman_image_get_solid (pixman_image_t *     image,
 273                          pixman_format_code_t format);
 274
 275 #define PIXMAN_IMAGE_GET_LINE(image, x, y, type, out_stride, line, mul) \
 276     do                                                                  \
 277     {                                                                   \
 278         uint32_t *__bits__;                                             \
 279         int       __stride__;                                           \
 280                                                                         \
 281         __bits__ = image->bits.bits;                                    \
 282         __stride__ = image->bits.rowstride;                             \
 283         (out_stride) =                                                  \
 284             __stride__ * (int) sizeof (uint32_t) / (int) sizeof (type); \
 285         (line) =                                                        \
 286             ((type *) __bits__) + (out_stride) * (y) + (mul) * (x);     \
 287     } while (0)
 288
 289 /*
 290  * Gradient walker
 291  */
 292 typedef struct
 293 {
 294     uint32_t                left_ag;
 295     uint32_t                left_rb;
 296     uint32_t                right_ag;
 297     uint32_t                right_rb;
 298     int32_t                 left_x;
 299     int32_t                 right_x;
 300     int32_t                 stepper;
 301
 302     pixman_gradient_stop_t *stops;
 303     int                     num_stops;
 304     unsigned int            spread;
 305
 306     int                     need_reset;
 307 } pixman_gradient_walker_t;
 308
 309 void
 310 _pixman_gradient_walker_init (pixman_gradient_walker_t *walker,
 311                               gradient_t *              gradient,
 312                               unsigned int              spread);
 313
 314 void
 315 _pixman_gradient_walker_reset (pixman_gradient_walker_t *walker,
 316                                pixman_fixed_32_32_t      pos);
 317
 318 uint32_t
 319 _pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker,
 320                                pixman_fixed_32_32_t      x);
 321
 322 /*
 323  * Edges
 324  */
 325
 326 #define MAX_ALPHA(n)    ((1 << (n)) - 1)
 327 #define N_Y_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) - 1)
 328 #define N_X_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) + 1)
 329
 330 #define STEP_Y_SMALL(n) (pixman_fixed_1 / N_Y_FRAC (n))
 331 #define STEP_Y_BIG(n)   (pixman_fixed_1 - (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 332
 333 #define Y_FRAC_FIRST(n) (STEP_Y_BIG (n) / 2)
 334 #define Y_FRAC_LAST(n)  (Y_FRAC_FIRST (n) + (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 335
 336 #define STEP_X_SMALL(n) (pixman_fixed_1 / N_X_FRAC (n))
 337 #define STEP_X_BIG(n)   (pixman_fixed_1 - (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 338
 339 #define X_FRAC_FIRST(n) (STEP_X_BIG (n) / 2)
 340 #define X_FRAC_LAST(n)  (X_FRAC_FIRST (n) + (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 341
 342 #define RENDER_SAMPLES_X(x, n)                                          \
 343     ((n) == 1? 0 : (pixman_fixed_frac (x) +                             \
 344                     X_FRAC_FIRST (n)) / STEP_X_SMALL (n))
 345
 346 void
 347 pixman_rasterize_edges_accessors (pixman_image_t *image,
 348                                   pixman_edge_t * l,
 349                                   pixman_edge_t * r,
 350                                   pixman_fixed_t  t,
 351                                   pixman_fixed_t  b);
 352
 353 /*
 354  * Implementations
 355  */
 356 typedef struct pixman_implementation_t pixman_implementation_t;
 357
 358 typedef void (*pixman_combine_32_func_t) (pixman_implementation_t *imp,
 359                                           pixman_op_t              op,
 360                                           uint32_t *               dest,
 361                                           const uint32_t *         src,
 362                                           const uint32_t *         mask,
 363                                           int                      width);
 364
 365 typedef void (*pixman_combine_64_func_t) (pixman_implementation_t *imp,
 366                                           pixman_op_t              op,
 367                                           uint64_t *               dest,
 368                                           const uint64_t *         src,
 369                                           const uint64_t *         mask,
 370                                           int                      width);
 371
 372 typedef void (*pixman_composite_func_t) (pixman_implementation_t *imp,
 373                                          pixman_op_t              op,
 374                                          pixman_image_t *         src,
 375                                          pixman_image_t *         mask,
 376                                          pixman_image_t *         dest,
 377                                          int32_t                  src_x,
 378                                          int32_t                  src_y,
 379                                          int32_t                  mask_x,
 380                                          int32_t                  mask_y,
 381                                          int32_t                  dest_x,
 382                                          int32_t                  dest_y,
 383                                          int32_t                  width,
 384                                          int32_t                  height);
 385 typedef pixman_bool_t (*pixman_blt_func_t) (pixman_implementation_t *imp,
 386                                             uint32_t *               src_bits,
 387                                             uint32_t *               dst_bits,
 388                                             int                      src_stride,
 389                                             int                      dst_stride,
 390                                             int                      src_bpp,
 391                                             int                      dst_bpp,
 392                                             int                      src_x,
 393                                             int                      src_y,
 394                                             int                      dst_x,
 395                                             int                      dst_y,
 396                                             int                      width,
 397                                             int                      height);
 398 typedef pixman_bool_t (*pixman_fill_func_t) (pixman_implementation_t *imp,
 399                                              uint32_t *               bits,
 400                                              int                      stride,
 401                                              int                      bpp,
 402                                              int                      x,
 403                                              int                      y,
 404                                              int                      width,
 405                                              int                      height,
 406                                              uint32_t                 xor);
 407
 408 void _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp);
 409 void _pixman_setup_combiner_functions_64 (pixman_implementation_t *imp);
 410
 411 typedef struct
 412 {
 413     pixman_op_t             op;
 414     pixman_format_code_t    src_format;
 415     uint32_t                src_flags;
 416     pixman_format_code_t    mask_format;
 417     uint32_t                mask_flags;
 418     pixman_format_code_t    dest_format;
 419     uint32_t                dest_flags;
 420     pixman_composite_func_t func;
 421 } pixman_fast_path_t;
 422
 423 struct pixman_implementation_t
 424 {
 425     pixman_implementation_t *   toplevel;
 426     pixman_implementation_t *   delegate;
 427     const pixman_fast_path_t *  fast_paths;
 428
 429     pixman_blt_func_t           blt;
 430     pixman_fill_func_t          fill;
 431
 432     pixman_combine_32_func_t    combine_32[PIXMAN_N_OPERATORS];
 433     pixman_combine_32_func_t    combine_32_ca[PIXMAN_N_OPERATORS];
 434     pixman_combine_64_func_t    combine_64[PIXMAN_N_OPERATORS];
 435     pixman_combine_64_func_t    combine_64_ca[PIXMAN_N_OPERATORS];
 436 };
 437
 438 pixman_implementation_t *
 439 _pixman_implementation_create (pixman_implementation_t *delegate,
 440                                const pixman_fast_path_t *fast_paths);
 441
 442 void
 443 _pixman_implementation_combine_32 (pixman_implementation_t *imp,
 444                                    pixman_op_t              op,
 445                                    uint32_t *               dest,
 446                                    const uint32_t *         src,
 447                                    const uint32_t *         mask,
 448                                    int                      width);
 449 void
 450 _pixman_implementation_combine_64 (pixman_implementation_t *imp,
 451                                    pixman_op_t              op,
 452                                    uint64_t *               dest,
 453                                    const uint64_t *         src,
 454                                    const uint64_t *         mask,
 455                                    int                      width);
 456 void
 457 _pixman_implementation_combine_32_ca (pixman_implementation_t *imp,
 458                                       pixman_op_t              op,
 459                                       uint32_t *               dest,
 460                                       const uint32_t *         src,
 461                                       const uint32_t *         mask,
 462                                       int                      width);
 463 void
 464 _pixman_implementation_combine_64_ca (pixman_implementation_t *imp,
 465                                       pixman_op_t              op,
 466                                       uint64_t *               dest,
 467                                       const uint64_t *         src,
 468                                       const uint64_t *         mask,
 469                                       int                      width);
 470
 471 pixman_bool_t
 472 _pixman_implementation_blt (pixman_implementation_t *imp,
 473                             uint32_t *               src_bits,
 474                             uint32_t *               dst_bits,
 475                             int                      src_stride,
 476                             int                      dst_stride,
 477                             int                      src_bpp,
 478                             int                      dst_bpp,
 479                             int                      src_x,
 480                             int                      src_y,
 481                             int                      dst_x,
 482                             int                      dst_y,
 483                             int                      width,
 484                             int                      height);
 485
 486 pixman_bool_t
 487 _pixman_implementation_fill (pixman_implementation_t *imp,
 488                              uint32_t *               bits,
 489                              int                      stride,
 490                              int                      bpp,
 491                              int                      x,
 492                              int                      y,
 493                              int                      width,
 494                              int                      height,
 495                              uint32_t                 xor);
 496
 497 /* Specific implementations */
 498 pixman_implementation_t *
 499 _pixman_implementation_create_general (void);
 500
 501 pixman_implementation_t *
 502 _pixman_implementation_create_fast_path (void);
 503
 504 #ifdef USE_MMX
 505 pixman_implementation_t *
 506 _pixman_implementation_create_mmx (void);
 507 #endif
 508
 509 #ifdef USE_SSE2
 510 pixman_implementation_t *
 511 _pixman_implementation_create_sse2 (void);
 512 #endif
 513
 514 #ifdef USE_ARM_SIMD
 515 pixman_implementation_t *
 516 _pixman_implementation_create_arm_simd (void);
 517 #endif
 518
 519 #ifdef USE_ARM_NEON
 520 pixman_implementation_t *
 521 _pixman_implementation_create_arm_neon (void);
 522 #endif
 523
 524 #ifdef USE_VMX
 525 pixman_implementation_t *
 526 _pixman_implementation_create_vmx (void);
 527 #endif
 528
 529 pixman_implementation_t *
 530 _pixman_choose_implementation (void);
 531
 532
 533
 534 /*
 535  * Utilities
 536  */
 537
 538 /* These "formats" all have depth 0, so they
 539  * will never clash with any real ones
 540  */
 541 #define PIXMAN_null             PIXMAN_FORMAT (0, 0, 0, 0, 0, 0)
 542 #define PIXMAN_solid            PIXMAN_FORMAT (0, 1, 0, 0, 0, 0)
 543 #define PIXMAN_pixbuf           PIXMAN_FORMAT (0, 2, 0, 0, 0, 0)
 544 #define PIXMAN_rpixbuf          PIXMAN_FORMAT (0, 3, 0, 0, 0, 0)
 545 #define PIXMAN_unknown          PIXMAN_FORMAT (0, 4, 0, 0, 0, 0)
 546 #define PIXMAN_any              PIXMAN_FORMAT (0, 5, 0, 0, 0, 0)
 547
 548 #define PIXMAN_OP_any           (PIXMAN_N_OPERATORS + 1)
 549
 550 #define FAST_PATH_ID_TRANSFORM                  (1 <<  0)
 551 #define FAST_PATH_NO_ALPHA_MAP                  (1 <<  1)
 552 #define FAST_PATH_NO_CONVOLUTION_FILTER         (1 <<  2)
 553 #define FAST_PATH_NO_PAD_REPEAT                 (1 <<  3)
 554 #define FAST_PATH_NO_REFLECT_REPEAT             (1 <<  4)
 555 #define FAST_PATH_NO_ACCESSORS                  (1 <<  5)
 556 #define FAST_PATH_NARROW_FORMAT                 (1 <<  6)
 557 #define FAST_PATH_COMPONENT_ALPHA               (1 <<  8)
 558 #define FAST_PATH_SAMPLES_OPAQUE                (1 <<  7)
 559 #define FAST_PATH_UNIFIED_ALPHA                 (1 <<  9)
 560 #define FAST_PATH_SCALE_TRANSFORM               (1 << 10)
 561 #define FAST_PATH_NEAREST_FILTER                (1 << 11)
 562 #define FAST_PATH_HAS_TRANSFORM                 (1 << 12)
 563 #define FAST_PATH_IS_OPAQUE                     (1 << 13)
 564 #define FAST_PATH_NEEDS_WORKAROUND              (1 << 14)
 565 #define FAST_PATH_NO_NONE_REPEAT                (1 << 15)
 566 #define FAST_PATH_SAMPLES_COVER_CLIP            (1 << 16)
 567 #define FAST_PATH_X_UNIT_POSITIVE               (1 << 17)
 568 #define FAST_PATH_AFFINE_TRANSFORM              (1 << 18)
 569 #define FAST_PATH_Y_UNIT_ZERO                   (1 << 19)
 570 #define FAST_PATH_BILINEAR_FILTER               (1 << 20)
 571 #define FAST_PATH_NO_NORMAL_REPEAT              (1 << 21)
 572
 573 #define FAST_PATH_PAD_REPEAT                                            \
 574     (FAST_PATH_NO_NONE_REPEAT           |                               \
 575      FAST_PATH_NO_NORMAL_REPEAT         |                               \
 576      FAST_PATH_NO_REFLECT_REPEAT)
 577
 578 #define FAST_PATH_NORMAL_REPEAT                                         \
 579     (FAST_PATH_NO_NONE_REPEAT           |                               \
 580      FAST_PATH_NO_PAD_REPEAT            |                               \
 581      FAST_PATH_NO_REFLECT_REPEAT)
 582
 583 #define FAST_PATH_NONE_REPEAT                                           \
 584     (FAST_PATH_NO_NORMAL_REPEAT         |                               \
 585      FAST_PATH_NO_PAD_REPEAT            |                               \
 586      FAST_PATH_NO_REFLECT_REPEAT)
 587
 588 #define FAST_PATH_REFLECT_REPEAT                                        \
 589     (FAST_PATH_NO_NONE_REPEAT           |                               \
 590      FAST_PATH_NO_NORMAL_REPEAT         |                               \
 591      FAST_PATH_NO_PAD_REPEAT)
 592
 593 #define FAST_PATH_STANDARD_FLAGS                                        \
 594     (FAST_PATH_NO_CONVOLUTION_FILTER    |                               \
 595      FAST_PATH_NO_ACCESSORS             |                               \
 596      FAST_PATH_NO_ALPHA_MAP             |                               \
 597      FAST_PATH_NARROW_FORMAT)
 598
 599 #define FAST_PATH_STD_DEST_FLAGS                                        \
 600     (FAST_PATH_NO_ACCESSORS             |                               \
 601      FAST_PATH_NO_ALPHA_MAP             |                               \
 602      FAST_PATH_NARROW_FORMAT)
 603
 604 #define SOURCE_FLAGS(format)                                            \
 605     (FAST_PATH_STANDARD_FLAGS |                                         \
 606      ((PIXMAN_ ## format == PIXMAN_solid) ?                             \
 607       0 : (FAST_PATH_SAMPLES_COVER_CLIP | FAST_PATH_ID_TRANSFORM)))
 608
 609 #define MASK_FLAGS(format, extra)                                       \
 610     ((PIXMAN_ ## format == PIXMAN_null) ? 0 : (SOURCE_FLAGS (format) | extra))
 611
 612 #define FAST_PATH(op, src, src_flags, mask, mask_flags, dest, dest_flags, func) \
 613     PIXMAN_OP_ ## op,                                                   \
 614     PIXMAN_ ## src,                                                     \
 615     src_flags,                                                          \
 616     PIXMAN_ ## mask,                                                    \
 617     mask_flags,                                                         \
 618     PIXMAN_ ## dest,                                                    \
 619     dest_flags,                                                         \
 620     func
 621
 622 #define PIXMAN_STD_FAST_PATH(op, src, mask, dest, func)                 \
 623     { FAST_PATH (                                                       \
 624             op,                                                         \
 625             src,  SOURCE_FLAGS (src),                                   \
 626             mask, MASK_FLAGS (mask, FAST_PATH_UNIFIED_ALPHA),           \
 627             dest, FAST_PATH_STD_DEST_FLAGS,                             \
 628             func) }
 629
 630 #define PIXMAN_STD_FAST_PATH_CA(op, src, mask, dest, func)              \
 631     { FAST_PATH (                                                       \
 632             op,                                                         \
 633             src,  SOURCE_FLAGS (src),                                   \
 634             mask, MASK_FLAGS (mask, FAST_PATH_COMPONENT_ALPHA),         \
 635             dest, FAST_PATH_STD_DEST_FLAGS,                             \
 636             func) }
 637
 638 /* Memory allocation helpers */
 639 void *
 640 pixman_malloc_ab (unsigned int n, unsigned int b);
 641
 642 void *
 643 pixman_malloc_abc (unsigned int a, unsigned int b, unsigned int c);
 644
 645 pixman_bool_t
 646 pixman_multiply_overflows_int (unsigned int a, unsigned int b);
 647
 648 pixman_bool_t
 649 pixman_addition_overflows_int (unsigned int a, unsigned int b);
 650
 651 /* Compositing utilities */
 652 void
 653 pixman_expand (uint64_t *           dst,
 654                const uint32_t *     src,
 655                pixman_format_code_t format,
 656                int                  width);
 657
 658 void
 659 pixman_contract (uint32_t *      dst,
 660                  const uint64_t *src,
 661                  int             width);
 662
 663
 664 /* Region Helpers */
 665 pixman_bool_t
 666 pixman_region32_copy_from_region16 (pixman_region32_t *dst,
 667                                     pixman_region16_t *src);
 668
 669 pixman_bool_t
 670 pixman_region16_copy_from_region32 (pixman_region16_t *dst,
 671                                     pixman_region32_t *src);
 672
 673
 674 /* Misc macros */
 675
 676 #ifndef FALSE
 677 #   define FALSE 0
 678 #endif
 679
 680 #ifndef TRUE
 681 #   define TRUE 1
 682 #endif
 683
 684 #ifndef MIN
 685 #  define MIN(a, b) ((a < b) ? a : b)
 686 #endif
 687
 688 #ifndef MAX
 689 #  define MAX(a, b) ((a > b) ? a : b)
 690 #endif
 691
 692 /* Integer division that rounds towards -infinity */
 693 #define DIV(a, b)                                          \
 694     ((((a) < 0) == ((b) < 0)) ? (a) / (b) :                \
 695      ((a) - (b) + 1 - (((b) < 0) << 1)) / (b))
 696
 697 /* Modulus that produces the remainder wrt. DIV */
 698 #define MOD(a, b) ((a) < 0 ? ((b) - ((-(a) - 1) % (b))) - 1 : (a) % (b))
 699
 700 #define CLIP(v, low, high) ((v) < (low) ? (low) : ((v) > (high) ? (high) : (v)))
 701
 702 /* Conversion between 8888 and 0565 */
 703
 704 #define CONVERT_8888_TO_0565(s)                                         \
 705     ((((s) >> 3) & 0x001f) |                                            \
 706      (((s) >> 5) & 0x07e0) |                                            \
 707      (((s) >> 8) & 0xf800))
 708
 709 #define CONVERT_0565_TO_0888(s)                                         \
 710     (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) |                       \
 711      ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) |                   \
 712      ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)))
 713
 714 #define CONVERT_0565_TO_8888(s) (CONVERT_0565_TO_0888(s) | 0xff000000)
 715
 716 /* Trivial versions that are useful in macros */
 717 #define CONVERT_8888_TO_8888(s) (s)
 718 #define CONVERT_0565_TO_0565(s) (s)
 719
 720 #define PIXMAN_FORMAT_IS_WIDE(f)                                        \
 721     (PIXMAN_FORMAT_A (f) > 8 ||                                         \
 722      PIXMAN_FORMAT_R (f) > 8 ||                                         \
 723      PIXMAN_FORMAT_G (f) > 8 ||                                         \
 724      PIXMAN_FORMAT_B (f) > 8)
 725
 726 #ifdef WORDS_BIGENDIAN
 727 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) << (n))
 728 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) >> (n))
 729 #else
 730 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) >> (n))
 731 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) << (n))
 732 #endif
 733
 734 /*
 735  * Various debugging code
 736  */
 737
 738 #undef DEBUG
 739
 740 #define COMPILE_TIME_ASSERT(x)                                          \
 741     do { typedef int compile_time_assertion [(x)?1:-1]; } while (0)
 742
 743 /* Turn on debugging depending on what type of release this is
 744  */
 745 #if (((PIXMAN_VERSION_MICRO % 2) == 0) && ((PIXMAN_VERSION_MINOR % 2) == 1))
 746
 747 /* Debugging gets turned on for development releases because these
 748  * are the things that end up in bleeding edge distributions such
 749  * as Rawhide etc.
 750  *
 751  * For performance reasons we don't turn it on for stable releases or
 752  * random git checkouts. (Random git checkouts are often used for
 753  * performance work).
 754  */
 755
 756 #    define DEBUG
 757
 758 #endif
 759
 760 #ifdef DEBUG
 761
 762 void
 763 _pixman_log_error (const char *function, const char *message);
 764
 765 #define return_if_fail(expr)                                            \
 766     do                                                                  \
 767     {                                                                   \
 768         if (!(expr))                                                    \
 769         {                                                               \
 770             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 771             return;                                                     \
 772         }                                                               \
 773     }                                                                   \
 774     while (0)
 775
 776 #define return_val_if_fail(expr, retval)                                \
 777     do                                                                  \
 778     {                                                                   \
 779         if (!(expr))                                                    \
 780         {                                                               \
 781             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 782             return (retval);                                            \
 783         }                                                               \
 784     }                                                                   \
 785     while (0)
 786
 787 #define critical_if_fail(expr)                                          \
 788     do                                                                  \
 789     {                                                                   \
 790         if (!(expr))                                                    \
 791             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 792     }                                                                   \
 793     while (0)
 794
 795
 796 #else
 797
 798 #define _pixman_log_error(f,m) do { } while (0)                         \
 799
 800 #define return_if_fail(expr)                                            \
 801     do                                                                  \
 802     {                                                                   \
 803         if (!(expr))                                                    \
 804             return;                                                     \
 805     }                                                                   \
 806     while (0)
 807
 808 #define return_val_if_fail(expr, retval)                                \
 809     do                                                                  \
 810     {                                                                   \
 811         if (!(expr))                                                    \
 812             return (retval);                                            \
 813     }                                                                   \
 814     while (0)
 815
 816 #define critical_if_fail(expr)                                          \
 817     do                                                                  \
 818     {                                                                   \
 819     }                                                                   \
 820     while (0)
 821 #endif
 822
 823 /*
 824  * Timers
 825  */
 826
 827 #ifdef PIXMAN_TIMERS
 828
 829 static inline uint64_t
 830 oil_profile_stamp_rdtsc (void)
 831 {
 832     uint64_t ts;
 833
 834     __asm__ __volatile__ ("rdtsc\n" : "=A" (ts));
 835     return ts;
 836 }
 837
 838 #define OIL_STAMP oil_profile_stamp_rdtsc
 839
 840 typedef struct pixman_timer_t pixman_timer_t;
 841
 842 struct pixman_timer_t
 843 {
 844     int             initialized;
 845     const char *    name;
 846     uint64_t        n_times;
 847     uint64_t        total;
 848     pixman_timer_t *next;
 849 };
 850
 851 extern int timer_defined;
 852
 853 void pixman_timer_register (pixman_timer_t *timer);
 854
 855 #define TIMER_BEGIN(tname)                                              \
 856     {                                                                   \
 857         static pixman_timer_t timer ## tname;                           \
 858         uint64_t              begin ## tname;                           \
 859                                                                         \
 860         if (!timer ## tname.initialized)                                \
 861         {                                                               \
 862             timer ## tname.initialized = 1;                             \
 863             timer ## tname.name = # tname;                              \
 864             pixman_timer_register (&timer ## tname);                    \
 865         }                                                               \
 866                                                                         \
 867         timer ## tname.n_times++;                                       \
 868         begin ## tname = OIL_STAMP ();
 869
 870 #define TIMER_END(tname)                                                \
 871     timer ## tname.total += OIL_STAMP () - begin ## tname;              \
 872     }
 873
 874 #endif /* PIXMAN_TIMERS */
 875
 876 #endif /* PIXMAN_PRIVATE_H */