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 solid_fill solid_fill_t;
  24 typedef struct gradient gradient_t;
  25 typedef struct linear_gradient linear_gradient_t;
  26 typedef struct horizontal_gradient horizontal_gradient_t;
  27 typedef struct vertical_gradient vertical_gradient_t;
  28 typedef struct conical_gradient conical_gradient_t;
  29 typedef struct radial_gradient radial_gradient_t;
  30 typedef struct bits_image bits_image_t;
  31 typedef struct circle circle_t;
  32
  33 typedef void (*fetch_scanline_t) (pixman_image_t *image,
  34                                   int             x,
  35                                   int             y,
  36                                   int             width,
  37                                   uint32_t       *buffer,
  38                                   const uint32_t *mask);
  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_t;
  68
  69 typedef source_image_class_t (*classify_func_t) (pixman_image_t *image,
  70                                                 int             x,
  71                                                 int             y,
  72                                                 int             width,
  73                                                 int             height);
  74 typedef void (*property_changed_func_t) (pixman_image_t *image);
  75
  76 struct image_common
  77 {
  78     image_type_t                type;
  79     int32_t                     ref_count;
  80     pixman_region32_t           clip_region;
  81     int32_t                     alpha_count;        /* How many times this image is being used as an alpha map */
  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_transform_t *        transform;
  90     pixman_repeat_t             repeat;
  91     pixman_filter_t             filter;
  92     pixman_fixed_t *            filter_params;
  93     int                         n_filter_params;
  94     bits_image_t *              alpha_map;
  95     int                         alpha_origin_x;
  96     int                         alpha_origin_y;
  97     pixman_bool_t               component_alpha;
  98     classify_func_t             classify;
  99     property_changed_func_t     property_changed;
 100     fetch_scanline_t            get_scanline_32;
 101     fetch_scanline_t            get_scanline_64;
 102
 103     pixman_image_destroy_func_t destroy_func;
 104     void *                      destroy_data;
 105
 106     uint32_t                    flags;
 107     pixman_format_code_t        extended_format_code;
 108 };
 109
 110 struct solid_fill
 111 {
 112     image_common_t common;
 113     pixman_color_t color;
 114
 115     uint32_t       color_32;
 116     uint64_t       color_64;
 117 };
 118
 119 struct gradient
 120 {
 121     image_common_t          common;
 122     int                     n_stops;
 123     pixman_gradient_stop_t *stops;
 124 };
 125
 126 struct linear_gradient
 127 {
 128     gradient_t           common;
 129     pixman_point_fixed_t p1;
 130     pixman_point_fixed_t p2;
 131 };
 132
 133 struct circle
 134 {
 135     pixman_fixed_t x;
 136     pixman_fixed_t y;
 137     pixman_fixed_t radius;
 138 };
 139
 140 struct radial_gradient
 141 {
 142     gradient_t common;
 143
 144     circle_t   c1;
 145     circle_t   c2;
 146
 147     circle_t   delta;
 148     double     a;
 149     double     inva;
 150     double     mindr;
 151 };
 152
 153 struct conical_gradient
 154 {
 155     gradient_t           common;
 156     pixman_point_fixed_t center;
 157     double               angle;
 158 };
 159
 160 struct bits_image
 161 {
 162     image_common_t             common;
 163     pixman_format_code_t       format;
 164     const pixman_indexed_t *   indexed;
 165     int                        width;
 166     int                        height;
 167     uint32_t *                 bits;
 168     uint32_t *                 free_me;
 169     int                        rowstride;  /* in number of uint32_t's */
 170
 171     fetch_scanline_t           fetch_scanline_32;
 172     fetch_pixel_32_t           fetch_pixel_32;
 173     store_scanline_t           store_scanline_32;
 174
 175     fetch_scanline_t           fetch_scanline_64;
 176     fetch_pixel_64_t           fetch_pixel_64;
 177     store_scanline_t           store_scanline_64;
 178
 179     /* Used for indirect access to the bits */
 180     pixman_read_memory_func_t  read_func;
 181     pixman_write_memory_func_t write_func;
 182 };
 183
 184 union pixman_image
 185 {
 186     image_type_t       type;
 187     image_common_t     common;
 188     bits_image_t       bits;
 189     gradient_t         gradient;
 190     linear_gradient_t  linear;
 191     conical_gradient_t conical;
 192     radial_gradient_t  radial;
 193     solid_fill_t       solid;
 194 };
 195
 196 void
 197 _pixman_bits_image_setup_accessors (bits_image_t *image);
 198
 199 void
 200 _pixman_image_get_scanline_generic_64  (pixman_image_t *image,
 201                                         int             x,
 202                                         int             y,
 203                                         int             width,
 204                                         uint32_t *      buffer,
 205                                         const uint32_t *mask);
 206
 207 source_image_class_t
 208 _pixman_image_classify (pixman_image_t *image,
 209                         int             x,
 210                         int             y,
 211                         int             width,
 212                         int             height);
 213
 214 void
 215 _pixman_image_get_scanline_32 (pixman_image_t *image,
 216                                int             x,
 217                                int             y,
 218                                int             width,
 219                                uint32_t *      buffer,
 220                                const uint32_t *mask);
 221
 222 /* Even thought the type of buffer is uint32_t *, the function actually expects
 223  * a uint64_t *buffer.
 224  */
 225 void
 226 _pixman_image_get_scanline_64 (pixman_image_t *image,
 227                                int             x,
 228                                int             y,
 229                                int             width,
 230                                uint32_t *      buffer,
 231                                const uint32_t *unused);
 232
 233 void
 234 _pixman_image_store_scanline_32 (bits_image_t *  image,
 235                                  int             x,
 236                                  int             y,
 237                                  int             width,
 238                                  const uint32_t *buffer);
 239
 240 /* Even though the type of buffer is uint32_t *, the function
 241  * actually expects a uint64_t *buffer.
 242  */
 243 void
 244 _pixman_image_store_scanline_64 (bits_image_t *  image,
 245                                  int             x,
 246                                  int             y,
 247                                  int             width,
 248                                  const uint32_t *buffer);
 249
 250 pixman_image_t *
 251 _pixman_image_allocate (void);
 252
 253 pixman_bool_t
 254 _pixman_init_gradient (gradient_t *                  gradient,
 255                        const pixman_gradient_stop_t *stops,
 256                        int                           n_stops);
 257 void
 258 _pixman_image_reset_clip_region (pixman_image_t *image);
 259
 260 void
 261 _pixman_image_validate (pixman_image_t *image);
 262
 263 uint32_t
 264 _pixman_image_get_solid (pixman_image_t *     image,
 265                          pixman_format_code_t format);
 266
 267 #define PIXMAN_IMAGE_GET_LINE(image, x, y, type, out_stride, line, mul) \
 268     do                                                                  \
 269     {                                                                   \
 270         uint32_t *__bits__;                                             \
 271         int       __stride__;                                           \
 272                                                                         \
 273         __bits__ = image->bits.bits;                                    \
 274         __stride__ = image->bits.rowstride;                             \
 275         (out_stride) =                                                  \
 276             __stride__ * (int) sizeof (uint32_t) / (int) sizeof (type); \
 277         (line) =                                                        \
 278             ((type *) __bits__) + (out_stride) * (y) + (mul) * (x);     \
 279     } while (0)
 280
 281 /*
 282  * Gradient walker
 283  */
 284 typedef struct
 285 {
 286     uint32_t                left_ag;
 287     uint32_t                left_rb;
 288     uint32_t                right_ag;
 289     uint32_t                right_rb;
 290     int32_t                 left_x;
 291     int32_t                 right_x;
 292     int32_t                 stepper;
 293
 294     pixman_gradient_stop_t *stops;
 295     int                     num_stops;
 296     unsigned int            spread;
 297
 298     int                     need_reset;
 299 } pixman_gradient_walker_t;
 300
 301 void
 302 _pixman_gradient_walker_init (pixman_gradient_walker_t *walker,
 303                               gradient_t *              gradient,
 304                               unsigned int              spread);
 305
 306 void
 307 _pixman_gradient_walker_reset (pixman_gradient_walker_t *walker,
 308                                pixman_fixed_32_32_t      pos);
 309
 310 uint32_t
 311 _pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker,
 312                                pixman_fixed_32_32_t      x);
 313
 314 /*
 315  * Edges
 316  */
 317
 318 #define MAX_ALPHA(n)    ((1 << (n)) - 1)
 319 #define N_Y_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) - 1)
 320 #define N_X_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) + 1)
 321
 322 #define STEP_Y_SMALL(n) (pixman_fixed_1 / N_Y_FRAC (n))
 323 #define STEP_Y_BIG(n)   (pixman_fixed_1 - (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 324
 325 #define Y_FRAC_FIRST(n) (STEP_Y_BIG (n) / 2)
 326 #define Y_FRAC_LAST(n)  (Y_FRAC_FIRST (n) + (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 327
 328 #define STEP_X_SMALL(n) (pixman_fixed_1 / N_X_FRAC (n))
 329 #define STEP_X_BIG(n)   (pixman_fixed_1 - (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 330
 331 #define X_FRAC_FIRST(n) (STEP_X_BIG (n) / 2)
 332 #define X_FRAC_LAST(n)  (X_FRAC_FIRST (n) + (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 333
 334 #define RENDER_SAMPLES_X(x, n)                                          \
 335     ((n) == 1? 0 : (pixman_fixed_frac (x) +                             \
 336                     X_FRAC_FIRST (n)) / STEP_X_SMALL (n))
 337
 338 void
 339 pixman_rasterize_edges_accessors (pixman_image_t *image,
 340                                   pixman_edge_t * l,
 341                                   pixman_edge_t * r,
 342                                   pixman_fixed_t  t,
 343                                   pixman_fixed_t  b);
 344
 345 /*
 346  * Implementations
 347  */
 348 typedef struct pixman_implementation_t pixman_implementation_t;
 349
 350 typedef void (*pixman_combine_32_func_t) (pixman_implementation_t *imp,
 351                                           pixman_op_t              op,
 352                                           uint32_t *               dest,
 353                                           const uint32_t *         src,
 354                                           const uint32_t *         mask,
 355                                           int                      width);
 356
 357 typedef void (*pixman_combine_64_func_t) (pixman_implementation_t *imp,
 358                                           pixman_op_t              op,
 359                                           uint64_t *               dest,
 360                                           const uint64_t *         src,
 361                                           const uint64_t *         mask,
 362                                           int                      width);
 363
 364 typedef void (*pixman_composite_func_t) (pixman_implementation_t *imp,
 365                                          pixman_op_t              op,
 366                                          pixman_image_t *         src,
 367                                          pixman_image_t *         mask,
 368                                          pixman_image_t *         dest,
 369                                          int32_t                  src_x,
 370                                          int32_t                  src_y,
 371                                          int32_t                  mask_x,
 372                                          int32_t                  mask_y,
 373                                          int32_t                  dest_x,
 374                                          int32_t                  dest_y,
 375                                          int32_t                  width,
 376                                          int32_t                  height);
 377 typedef pixman_bool_t (*pixman_blt_func_t) (pixman_implementation_t *imp,
 378                                             uint32_t *               src_bits,
 379                                             uint32_t *               dst_bits,
 380                                             int                      src_stride,
 381                                             int                      dst_stride,
 382                                             int                      src_bpp,
 383                                             int                      dst_bpp,
 384                                             int                      src_x,
 385                                             int                      src_y,
 386                                             int                      dst_x,
 387                                             int                      dst_y,
 388                                             int                      width,
 389                                             int                      height);
 390 typedef pixman_bool_t (*pixman_fill_func_t) (pixman_implementation_t *imp,
 391                                              uint32_t *               bits,
 392                                              int                      stride,
 393                                              int                      bpp,
 394                                              int                      x,
 395                                              int                      y,
 396                                              int                      width,
 397                                              int                      height,
 398                                              uint32_t                 xor);
 399
 400 void _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp);
 401 void _pixman_setup_combiner_functions_64 (pixman_implementation_t *imp);
 402
 403 typedef struct
 404 {
 405     pixman_op_t             op;
 406     pixman_format_code_t    src_format;
 407     uint32_t                src_flags;
 408     pixman_format_code_t    mask_format;
 409     uint32_t                mask_flags;
 410     pixman_format_code_t    dest_format;
 411     uint32_t                dest_flags;
 412     pixman_composite_func_t func;
 413 } pixman_fast_path_t;
 414
 415 struct pixman_implementation_t
 416 {
 417     pixman_implementation_t *   toplevel;
 418     pixman_implementation_t *   delegate;
 419     const pixman_fast_path_t *  fast_paths;
 420
 421     pixman_blt_func_t           blt;
 422     pixman_fill_func_t          fill;
 423
 424     pixman_combine_32_func_t    combine_32[PIXMAN_N_OPERATORS];
 425     pixman_combine_32_func_t    combine_32_ca[PIXMAN_N_OPERATORS];
 426     pixman_combine_64_func_t    combine_64[PIXMAN_N_OPERATORS];
 427     pixman_combine_64_func_t    combine_64_ca[PIXMAN_N_OPERATORS];
 428 };
 429
 430 pixman_implementation_t *
 431 _pixman_implementation_create (pixman_implementation_t *delegate,
 432                                const pixman_fast_path_t *fast_paths);
 433
 434 void
 435 _pixman_implementation_combine_32 (pixman_implementation_t *imp,
 436                                    pixman_op_t              op,
 437                                    uint32_t *               dest,
 438                                    const uint32_t *         src,
 439                                    const uint32_t *         mask,
 440                                    int                      width);
 441 void
 442 _pixman_implementation_combine_64 (pixman_implementation_t *imp,
 443                                    pixman_op_t              op,
 444                                    uint64_t *               dest,
 445                                    const uint64_t *         src,
 446                                    const uint64_t *         mask,
 447                                    int                      width);
 448 void
 449 _pixman_implementation_combine_32_ca (pixman_implementation_t *imp,
 450                                       pixman_op_t              op,
 451                                       uint32_t *               dest,
 452                                       const uint32_t *         src,
 453                                       const uint32_t *         mask,
 454                                       int                      width);
 455 void
 456 _pixman_implementation_combine_64_ca (pixman_implementation_t *imp,
 457                                       pixman_op_t              op,
 458                                       uint64_t *               dest,
 459                                       const uint64_t *         src,
 460                                       const uint64_t *         mask,
 461                                       int                      width);
 462
 463 pixman_bool_t
 464 _pixman_implementation_blt (pixman_implementation_t *imp,
 465                             uint32_t *               src_bits,
 466                             uint32_t *               dst_bits,
 467                             int                      src_stride,
 468                             int                      dst_stride,
 469                             int                      src_bpp,
 470                             int                      dst_bpp,
 471                             int                      src_x,
 472                             int                      src_y,
 473                             int                      dst_x,
 474                             int                      dst_y,
 475                             int                      width,
 476                             int                      height);
 477
 478 pixman_bool_t
 479 _pixman_implementation_fill (pixman_implementation_t *imp,
 480                              uint32_t *               bits,
 481                              int                      stride,
 482                              int                      bpp,
 483                              int                      x,
 484                              int                      y,
 485                              int                      width,
 486                              int                      height,
 487                              uint32_t                 xor);
 488
 489 /* Specific implementations */
 490 pixman_implementation_t *
 491 _pixman_implementation_create_general (void);
 492
 493 pixman_implementation_t *
 494 _pixman_implementation_create_fast_path (void);
 495
 496 #ifdef USE_MMX
 497 pixman_implementation_t *
 498 _pixman_implementation_create_mmx (void);
 499 #endif
 500
 501 #ifdef USE_SSE2
 502 pixman_implementation_t *
 503 _pixman_implementation_create_sse2 (void);
 504 #endif
 505
 506 #ifdef USE_ARM_SIMD
 507 pixman_implementation_t *
 508 _pixman_implementation_create_arm_simd (void);
 509 #endif
 510
 511 #ifdef USE_ARM_NEON
 512 pixman_implementation_t *
 513 _pixman_implementation_create_arm_neon (void);
 514 #endif
 515
 516 #ifdef USE_VMX
 517 pixman_implementation_t *
 518 _pixman_implementation_create_vmx (void);
 519 #endif
 520
 521 pixman_implementation_t *
 522 _pixman_choose_implementation (void);
 523
 524
 525
 526 /*
 527  * Utilities
 528  */
 529
 530 /* These "formats" all have depth 0, so they
 531  * will never clash with any real ones
 532  */
 533 #define PIXMAN_null             PIXMAN_FORMAT (0, 0, 0, 0, 0, 0)
 534 #define PIXMAN_solid            PIXMAN_FORMAT (0, 1, 0, 0, 0, 0)
 535 #define PIXMAN_pixbuf           PIXMAN_FORMAT (0, 2, 0, 0, 0, 0)
 536 #define PIXMAN_rpixbuf          PIXMAN_FORMAT (0, 3, 0, 0, 0, 0)
 537 #define PIXMAN_unknown          PIXMAN_FORMAT (0, 4, 0, 0, 0, 0)
 538 #define PIXMAN_any              PIXMAN_FORMAT (0, 5, 0, 0, 0, 0)
 539
 540 #define PIXMAN_OP_any           (PIXMAN_N_OPERATORS + 1)
 541
 542 #define FAST_PATH_ID_TRANSFORM                  (1 <<  0)
 543 #define FAST_PATH_NO_ALPHA_MAP                  (1 <<  1)
 544 #define FAST_PATH_NO_CONVOLUTION_FILTER         (1 <<  2)
 545 #define FAST_PATH_NO_PAD_REPEAT                 (1 <<  3)
 546 #define FAST_PATH_NO_REFLECT_REPEAT             (1 <<  4)
 547 #define FAST_PATH_NO_ACCESSORS                  (1 <<  5)
 548 #define FAST_PATH_NARROW_FORMAT                 (1 <<  6)
 549 #define FAST_PATH_COMPONENT_ALPHA               (1 <<  8)
 550 #define FAST_PATH_SAMPLES_OPAQUE                (1 <<  7)
 551 #define FAST_PATH_UNIFIED_ALPHA                 (1 <<  9)
 552 #define FAST_PATH_SCALE_TRANSFORM               (1 << 10)
 553 #define FAST_PATH_NEAREST_FILTER                (1 << 11)
 554 #define FAST_PATH_HAS_TRANSFORM                 (1 << 12)
 555 #define FAST_PATH_IS_OPAQUE                     (1 << 13)
 556 #define FAST_PATH_NO_NORMAL_REPEAT              (1 << 14)
 557 #define FAST_PATH_NO_NONE_REPEAT                (1 << 15)
 558 #define FAST_PATH_SAMPLES_COVER_CLIP            (1 << 16)
 559 #define FAST_PATH_X_UNIT_POSITIVE               (1 << 17)
 560 #define FAST_PATH_AFFINE_TRANSFORM              (1 << 18)
 561 #define FAST_PATH_Y_UNIT_ZERO                   (1 << 19)
 562 #define FAST_PATH_BILINEAR_FILTER               (1 << 20)
 563
 564 #define FAST_PATH_PAD_REPEAT                                            \
 565     (FAST_PATH_NO_NONE_REPEAT           |                               \
 566      FAST_PATH_NO_NORMAL_REPEAT         |                               \
 567      FAST_PATH_NO_REFLECT_REPEAT)
 568
 569 #define FAST_PATH_NORMAL_REPEAT                                         \
 570     (FAST_PATH_NO_NONE_REPEAT           |                               \
 571      FAST_PATH_NO_PAD_REPEAT            |                               \
 572      FAST_PATH_NO_REFLECT_REPEAT)
 573
 574 #define FAST_PATH_NONE_REPEAT                                           \
 575     (FAST_PATH_NO_NORMAL_REPEAT         |                               \
 576      FAST_PATH_NO_PAD_REPEAT            |                               \
 577      FAST_PATH_NO_REFLECT_REPEAT)
 578
 579 #define FAST_PATH_REFLECT_REPEAT                                        \
 580     (FAST_PATH_NO_NONE_REPEAT           |                               \
 581      FAST_PATH_NO_NORMAL_REPEAT         |                               \
 582      FAST_PATH_NO_PAD_REPEAT)
 583
 584 #define FAST_PATH_STANDARD_FLAGS                                        \
 585     (FAST_PATH_NO_CONVOLUTION_FILTER    |                               \
 586      FAST_PATH_NO_ACCESSORS             |                               \
 587      FAST_PATH_NO_ALPHA_MAP             |                               \
 588      FAST_PATH_NARROW_FORMAT)
 589
 590 #define FAST_PATH_STD_DEST_FLAGS                                        \
 591     (FAST_PATH_NO_ACCESSORS             |                               \
 592      FAST_PATH_NO_ALPHA_MAP             |                               \
 593      FAST_PATH_NARROW_FORMAT)
 594
 595 #define SOURCE_FLAGS(format)                                            \
 596     (FAST_PATH_STANDARD_FLAGS |                                         \
 597      ((PIXMAN_ ## format == PIXMAN_solid) ?                             \
 598       0 : (FAST_PATH_SAMPLES_COVER_CLIP | FAST_PATH_ID_TRANSFORM)))
 599
 600 #define MASK_FLAGS(format, extra)                                       \
 601     ((PIXMAN_ ## format == PIXMAN_null) ? 0 : (SOURCE_FLAGS (format) | extra))
 602
 603 #define FAST_PATH(op, src, src_flags, mask, mask_flags, dest, dest_flags, func) \
 604     PIXMAN_OP_ ## op,                                                   \
 605     PIXMAN_ ## src,                                                     \
 606     src_flags,                                                          \
 607     PIXMAN_ ## mask,                                                    \
 608     mask_flags,                                                         \
 609     PIXMAN_ ## dest,                                                    \
 610     dest_flags,                                                         \
 611     func
 612
 613 #define PIXMAN_STD_FAST_PATH(op, src, mask, dest, func)                 \
 614     { FAST_PATH (                                                       \
 615             op,                                                         \
 616             src,  SOURCE_FLAGS (src),                                   \
 617             mask, MASK_FLAGS (mask, FAST_PATH_UNIFIED_ALPHA),           \
 618             dest, FAST_PATH_STD_DEST_FLAGS,                             \
 619             func) }
 620
 621 #define PIXMAN_STD_FAST_PATH_CA(op, src, mask, dest, func)              \
 622     { FAST_PATH (                                                       \
 623             op,                                                         \
 624             src,  SOURCE_FLAGS (src),                                   \
 625             mask, MASK_FLAGS (mask, FAST_PATH_COMPONENT_ALPHA),         \
 626             dest, FAST_PATH_STD_DEST_FLAGS,                             \
 627             func) }
 628
 629 /* Memory allocation helpers */
 630 void *
 631 pixman_malloc_ab (unsigned int n, unsigned int b);
 632
 633 void *
 634 pixman_malloc_abc (unsigned int a, unsigned int b, unsigned int c);
 635
 636 pixman_bool_t
 637 pixman_multiply_overflows_int (unsigned int a, unsigned int b);
 638
 639 pixman_bool_t
 640 pixman_addition_overflows_int (unsigned int a, unsigned int b);
 641
 642 /* Compositing utilities */
 643 void
 644 pixman_expand (uint64_t *           dst,
 645                const uint32_t *     src,
 646                pixman_format_code_t format,
 647                int                  width);
 648
 649 void
 650 pixman_contract (uint32_t *      dst,
 651                  const uint64_t *src,
 652                  int             width);
 653
 654
 655 /* Region Helpers */
 656 pixman_bool_t
 657 pixman_region32_copy_from_region16 (pixman_region32_t *dst,
 658                                     pixman_region16_t *src);
 659
 660 pixman_bool_t
 661 pixman_region16_copy_from_region32 (pixman_region16_t *dst,
 662                                     pixman_region32_t *src);
 663
 664
 665 /* Misc macros */
 666
 667 #ifndef FALSE
 668 #   define FALSE 0
 669 #endif
 670
 671 #ifndef TRUE
 672 #   define TRUE 1
 673 #endif
 674
 675 #ifndef MIN
 676 #  define MIN(a, b) ((a < b) ? a : b)
 677 #endif
 678
 679 #ifndef MAX
 680 #  define MAX(a, b) ((a > b) ? a : b)
 681 #endif
 682
 683 /* Integer division that rounds towards -infinity */
 684 #define DIV(a, b)                                          \
 685     ((((a) < 0) == ((b) < 0)) ? (a) / (b) :                \
 686      ((a) - (b) + 1 - (((b) < 0) << 1)) / (b))
 687
 688 /* Modulus that produces the remainder wrt. DIV */
 689 #define MOD(a, b) ((a) < 0 ? ((b) - ((-(a) - 1) % (b))) - 1 : (a) % (b))
 690
 691 #define CLIP(v, low, high) ((v) < (low) ? (low) : ((v) > (high) ? (high) : (v)))
 692
 693 /* Conversion between 8888 and 0565 */
 694
 695 #define CONVERT_8888_TO_0565(s)                                         \
 696     ((((s) >> 3) & 0x001f) |                                            \
 697      (((s) >> 5) & 0x07e0) |                                            \
 698      (((s) >> 8) & 0xf800))
 699
 700 #define CONVERT_0565_TO_0888(s)                                         \
 701     (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) |                       \
 702      ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) |                   \
 703      ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)))
 704
 705 #define CONVERT_0565_TO_8888(s) (CONVERT_0565_TO_0888(s) | 0xff000000)
 706
 707 /* Trivial versions that are useful in macros */
 708 #define CONVERT_8888_TO_8888(s) (s)
 709 #define CONVERT_0565_TO_0565(s) (s)
 710
 711 #define PIXMAN_FORMAT_IS_WIDE(f)                                        \
 712     (PIXMAN_FORMAT_A (f) > 8 ||                                         \
 713      PIXMAN_FORMAT_R (f) > 8 ||                                         \
 714      PIXMAN_FORMAT_G (f) > 8 ||                                         \
 715      PIXMAN_FORMAT_B (f) > 8)
 716
 717 #ifdef WORDS_BIGENDIAN
 718 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) << (n))
 719 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) >> (n))
 720 #else
 721 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) >> (n))
 722 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) << (n))
 723 #endif
 724
 725 /*
 726  * Various debugging code
 727  */
 728
 729 #undef DEBUG
 730
 731 #define COMPILE_TIME_ASSERT(x)                                          \
 732     do { typedef int compile_time_assertion [(x)?1:-1]; } while (0)
 733
 734 /* Turn on debugging depending on what type of release this is
 735  */
 736 #if (((PIXMAN_VERSION_MICRO % 2) == 0) && ((PIXMAN_VERSION_MINOR % 2) == 1))
 737
 738 /* Debugging gets turned on for development releases because these
 739  * are the things that end up in bleeding edge distributions such
 740  * as Rawhide etc.
 741  *
 742  * For performance reasons we don't turn it on for stable releases or
 743  * random git checkouts. (Random git checkouts are often used for
 744  * performance work).
 745  */
 746
 747 #    define DEBUG
 748
 749 #endif
 750
 751 #ifdef DEBUG
 752
 753 void
 754 _pixman_log_error (const char *function, const char *message);
 755
 756 #define return_if_fail(expr)                                            \
 757     do                                                                  \
 758     {                                                                   \
 759         if (!(expr))                                                    \
 760         {                                                               \
 761             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 762             return;                                                     \
 763         }                                                               \
 764     }                                                                   \
 765     while (0)
 766
 767 #define return_val_if_fail(expr, retval)                                \
 768     do                                                                  \
 769     {                                                                   \
 770         if (!(expr))                                                    \
 771         {                                                               \
 772             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 773             return (retval);                                            \
 774         }                                                               \
 775     }                                                                   \
 776     while (0)
 777
 778 #define critical_if_fail(expr)                                          \
 779     do                                                                  \
 780     {                                                                   \
 781         if (!(expr))                                                    \
 782             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 783     }                                                                   \
 784     while (0)
 785
 786
 787 #else
 788
 789 #define _pixman_log_error(f,m) do { } while (0)                         \
 790
 791 #define return_if_fail(expr)                                            \
 792     do                                                                  \
 793     {                                                                   \
 794         if (!(expr))                                                    \
 795             return;                                                     \
 796     }                                                                   \
 797     while (0)
 798
 799 #define return_val_if_fail(expr, retval)                                \
 800     do                                                                  \
 801     {                                                                   \
 802         if (!(expr))                                                    \
 803             return (retval);                                            \
 804     }                                                                   \
 805     while (0)
 806
 807 #define critical_if_fail(expr)                                          \
 808     do                                                                  \
 809     {                                                                   \
 810     }                                                                   \
 811     while (0)
 812 #endif
 813
 814 /*
 815  * Timers
 816  */
 817
 818 #ifdef PIXMAN_TIMERS
 819
 820 static inline uint64_t
 821 oil_profile_stamp_rdtsc (void)
 822 {
 823     uint64_t ts;
 824
 825     __asm__ __volatile__ ("rdtsc\n" : "=A" (ts));
 826     return ts;
 827 }
 828
 829 #define OIL_STAMP oil_profile_stamp_rdtsc
 830
 831 typedef struct pixman_timer_t pixman_timer_t;
 832
 833 struct pixman_timer_t
 834 {
 835     int             initialized;
 836     const char *    name;
 837     uint64_t        n_times;
 838     uint64_t        total;
 839     pixman_timer_t *next;
 840 };
 841
 842 extern int timer_defined;
 843
 844 void pixman_timer_register (pixman_timer_t *timer);
 845
 846 #define TIMER_BEGIN(tname)                                              \
 847     {                                                                   \
 848         static pixman_timer_t timer ## tname;                           \
 849         uint64_t              begin ## tname;                           \
 850                                                                         \
 851         if (!timer ## tname.initialized)                                \
 852         {                                                               \
 853             timer ## tname.initialized = 1;                             \
 854             timer ## tname.name = # tname;                              \
 855             pixman_timer_register (&timer ## tname);                    \
 856         }                                                               \
 857                                                                         \
 858         timer ## tname.n_times++;                                       \
 859         begin ## tname = OIL_STAMP ();
 860
 861 #define TIMER_END(tname)                                                \
 862     timer ## tname.total += OIL_STAMP () - begin ## tname;              \
 863     }
 864
 865 #endif /* PIXMAN_TIMERS */
 866
 867 #endif /* PIXMAN_PRIVATE_H */