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 typedef struct pixman_iter_t pixman_iter_t;
 197 typedef enum
 198 {
 199     ITER_NARROW = (1 << 0),
 200 } iter_flags_t;
 201
 202 struct pixman_iter_t
 203 {
 204     uint32_t *(* get_scanline) (pixman_iter_t *iter, const uint32_t *mask);
 205     void      (* write_back)   (pixman_iter_t *iter);
 206
 207     pixman_image_t *    image;
 208     uint32_t *          buffer;
 209     int                 x, y;
 210     int                 width;
 211 };
 212
 213 void
 214 _pixman_bits_image_setup_accessors (bits_image_t *image);
 215
 216 void
 217 _pixman_bits_image_src_iter_init (pixman_image_t *image,
 218                                   pixman_iter_t *iter,
 219                                   int x, int y, int width, int height,
 220                                   uint8_t *buffer, iter_flags_t flags);
 221 void
 222 _pixman_bits_image_dest_iter_init (pixman_image_t *image,
 223                                    pixman_iter_t *iter,
 224                                    int x, int y, int width, int height,
 225                                    uint8_t *buffer, iter_flags_t flags);
 226
 227 void
 228 _pixman_image_get_scanline_generic_64  (pixman_image_t *image,
 229                                         int             x,
 230                                         int             y,
 231                                         int             width,
 232                                         uint32_t *      buffer,
 233                                         const uint32_t *mask);
 234
 235 source_image_class_t
 236 _pixman_image_classify (pixman_image_t *image,
 237                         int             x,
 238                         int             y,
 239                         int             width,
 240                         int             height);
 241
 242 void
 243 _pixman_image_get_scanline_32 (pixman_image_t *image,
 244                                int             x,
 245                                int             y,
 246                                int             width,
 247                                uint32_t *      buffer,
 248                                const uint32_t *mask);
 249
 250 /* Even thought the type of buffer is uint32_t *, the function actually expects
 251  * a uint64_t *buffer.
 252  */
 253 void
 254 _pixman_image_get_scanline_64 (pixman_image_t *image,
 255                                int             x,
 256                                int             y,
 257                                int             width,
 258                                uint32_t *      buffer,
 259                                const uint32_t *unused);
 260
 261 void
 262 _pixman_image_store_scanline_32 (bits_image_t *  image,
 263                                  int             x,
 264                                  int             y,
 265                                  int             width,
 266                                  const uint32_t *buffer);
 267
 268 /* Even though the type of buffer is uint32_t *, the function
 269  * actually expects a uint64_t *buffer.
 270  */
 271 void
 272 _pixman_image_store_scanline_64 (bits_image_t *  image,
 273                                  int             x,
 274                                  int             y,
 275                                  int             width,
 276                                  const uint32_t *buffer);
 277
 278 pixman_image_t *
 279 _pixman_image_allocate (void);
 280
 281 pixman_bool_t
 282 _pixman_init_gradient (gradient_t *                  gradient,
 283                        const pixman_gradient_stop_t *stops,
 284                        int                           n_stops);
 285 void
 286 _pixman_image_reset_clip_region (pixman_image_t *image);
 287
 288 void
 289 _pixman_image_validate (pixman_image_t *image);
 290
 291 uint32_t
 292 _pixman_image_get_solid (pixman_image_t *     image,
 293                          pixman_format_code_t format);
 294
 295 #define PIXMAN_IMAGE_GET_LINE(image, x, y, type, out_stride, line, mul) \
 296     do                                                                  \
 297     {                                                                   \
 298         uint32_t *__bits__;                                             \
 299         int       __stride__;                                           \
 300                                                                         \
 301         __bits__ = image->bits.bits;                                    \
 302         __stride__ = image->bits.rowstride;                             \
 303         (out_stride) =                                                  \
 304             __stride__ * (int) sizeof (uint32_t) / (int) sizeof (type); \
 305         (line) =                                                        \
 306             ((type *) __bits__) + (out_stride) * (y) + (mul) * (x);     \
 307     } while (0)
 308
 309 /*
 310  * Gradient walker
 311  */
 312 typedef struct
 313 {
 314     uint32_t                left_ag;
 315     uint32_t                left_rb;
 316     uint32_t                right_ag;
 317     uint32_t                right_rb;
 318     int32_t                 left_x;
 319     int32_t                 right_x;
 320     int32_t                 stepper;
 321
 322     pixman_gradient_stop_t *stops;
 323     int                     num_stops;
 324     unsigned int            spread;
 325
 326     int                     need_reset;
 327 } pixman_gradient_walker_t;
 328
 329 void
 330 _pixman_gradient_walker_init (pixman_gradient_walker_t *walker,
 331                               gradient_t *              gradient,
 332                               unsigned int              spread);
 333
 334 void
 335 _pixman_gradient_walker_reset (pixman_gradient_walker_t *walker,
 336                                pixman_fixed_32_32_t      pos);
 337
 338 uint32_t
 339 _pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker,
 340                                pixman_fixed_32_32_t      x);
 341
 342 /*
 343  * Edges
 344  */
 345
 346 #define MAX_ALPHA(n)    ((1 << (n)) - 1)
 347 #define N_Y_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) - 1)
 348 #define N_X_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) + 1)
 349
 350 #define STEP_Y_SMALL(n) (pixman_fixed_1 / N_Y_FRAC (n))
 351 #define STEP_Y_BIG(n)   (pixman_fixed_1 - (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 352
 353 #define Y_FRAC_FIRST(n) (STEP_Y_BIG (n) / 2)
 354 #define Y_FRAC_LAST(n)  (Y_FRAC_FIRST (n) + (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 355
 356 #define STEP_X_SMALL(n) (pixman_fixed_1 / N_X_FRAC (n))
 357 #define STEP_X_BIG(n)   (pixman_fixed_1 - (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 358
 359 #define X_FRAC_FIRST(n) (STEP_X_BIG (n) / 2)
 360 #define X_FRAC_LAST(n)  (X_FRAC_FIRST (n) + (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 361
 362 #define RENDER_SAMPLES_X(x, n)                                          \
 363     ((n) == 1? 0 : (pixman_fixed_frac (x) +                             \
 364                     X_FRAC_FIRST (n)) / STEP_X_SMALL (n))
 365
 366 void
 367 pixman_rasterize_edges_accessors (pixman_image_t *image,
 368                                   pixman_edge_t * l,
 369                                   pixman_edge_t * r,
 370                                   pixman_fixed_t  t,
 371                                   pixman_fixed_t  b);
 372
 373 /*
 374  * Implementations
 375  */
 376 typedef struct pixman_implementation_t pixman_implementation_t;
 377
 378 typedef void (*pixman_combine_32_func_t) (pixman_implementation_t *imp,
 379                                           pixman_op_t              op,
 380                                           uint32_t *               dest,
 381                                           const uint32_t *         src,
 382                                           const uint32_t *         mask,
 383                                           int                      width);
 384
 385 typedef void (*pixman_combine_64_func_t) (pixman_implementation_t *imp,
 386                                           pixman_op_t              op,
 387                                           uint64_t *               dest,
 388                                           const uint64_t *         src,
 389                                           const uint64_t *         mask,
 390                                           int                      width);
 391
 392 typedef void (*pixman_composite_func_t) (pixman_implementation_t *imp,
 393                                          pixman_op_t              op,
 394                                          pixman_image_t *         src,
 395                                          pixman_image_t *         mask,
 396                                          pixman_image_t *         dest,
 397                                          int32_t                  src_x,
 398                                          int32_t                  src_y,
 399                                          int32_t                  mask_x,
 400                                          int32_t                  mask_y,
 401                                          int32_t                  dest_x,
 402                                          int32_t                  dest_y,
 403                                          int32_t                  width,
 404                                          int32_t                  height);
 405 typedef pixman_bool_t (*pixman_blt_func_t) (pixman_implementation_t *imp,
 406                                             uint32_t *               src_bits,
 407                                             uint32_t *               dst_bits,
 408                                             int                      src_stride,
 409                                             int                      dst_stride,
 410                                             int                      src_bpp,
 411                                             int                      dst_bpp,
 412                                             int                      src_x,
 413                                             int                      src_y,
 414                                             int                      dst_x,
 415                                             int                      dst_y,
 416                                             int                      width,
 417                                             int                      height);
 418 typedef pixman_bool_t (*pixman_fill_func_t) (pixman_implementation_t *imp,
 419                                              uint32_t *               bits,
 420                                              int                      stride,
 421                                              int                      bpp,
 422                                              int                      x,
 423                                              int                      y,
 424                                              int                      width,
 425                                              int                      height,
 426                                              uint32_t                 xor);
 427
 428 void _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp);
 429 void _pixman_setup_combiner_functions_64 (pixman_implementation_t *imp);
 430
 431 typedef struct
 432 {
 433     pixman_op_t             op;
 434     pixman_format_code_t    src_format;
 435     uint32_t                src_flags;
 436     pixman_format_code_t    mask_format;
 437     uint32_t                mask_flags;
 438     pixman_format_code_t    dest_format;
 439     uint32_t                dest_flags;
 440     pixman_composite_func_t func;
 441 } pixman_fast_path_t;
 442
 443 struct pixman_implementation_t
 444 {
 445     pixman_implementation_t *   toplevel;
 446     pixman_implementation_t *   delegate;
 447     const pixman_fast_path_t *  fast_paths;
 448
 449     pixman_blt_func_t           blt;
 450     pixman_fill_func_t          fill;
 451
 452     pixman_combine_32_func_t    combine_32[PIXMAN_N_OPERATORS];
 453     pixman_combine_32_func_t    combine_32_ca[PIXMAN_N_OPERATORS];
 454     pixman_combine_64_func_t    combine_64[PIXMAN_N_OPERATORS];
 455     pixman_combine_64_func_t    combine_64_ca[PIXMAN_N_OPERATORS];
 456 };
 457
 458 pixman_implementation_t *
 459 _pixman_implementation_create (pixman_implementation_t *delegate,
 460                                const pixman_fast_path_t *fast_paths);
 461
 462 void
 463 _pixman_implementation_combine_32 (pixman_implementation_t *imp,
 464                                    pixman_op_t              op,
 465                                    uint32_t *               dest,
 466                                    const uint32_t *         src,
 467                                    const uint32_t *         mask,
 468                                    int                      width);
 469 void
 470 _pixman_implementation_combine_64 (pixman_implementation_t *imp,
 471                                    pixman_op_t              op,
 472                                    uint64_t *               dest,
 473                                    const uint64_t *         src,
 474                                    const uint64_t *         mask,
 475                                    int                      width);
 476 void
 477 _pixman_implementation_combine_32_ca (pixman_implementation_t *imp,
 478                                       pixman_op_t              op,
 479                                       uint32_t *               dest,
 480                                       const uint32_t *         src,
 481                                       const uint32_t *         mask,
 482                                       int                      width);
 483 void
 484 _pixman_implementation_combine_64_ca (pixman_implementation_t *imp,
 485                                       pixman_op_t              op,
 486                                       uint64_t *               dest,
 487                                       const uint64_t *         src,
 488                                       const uint64_t *         mask,
 489                                       int                      width);
 490
 491 pixman_bool_t
 492 _pixman_implementation_blt (pixman_implementation_t *imp,
 493                             uint32_t *               src_bits,
 494                             uint32_t *               dst_bits,
 495                             int                      src_stride,
 496                             int                      dst_stride,
 497                             int                      src_bpp,
 498                             int                      dst_bpp,
 499                             int                      src_x,
 500                             int                      src_y,
 501                             int                      dst_x,
 502                             int                      dst_y,
 503                             int                      width,
 504                             int                      height);
 505
 506 pixman_bool_t
 507 _pixman_implementation_fill (pixman_implementation_t *imp,
 508                              uint32_t *               bits,
 509                              int                      stride,
 510                              int                      bpp,
 511                              int                      x,
 512                              int                      y,
 513                              int                      width,
 514                              int                      height,
 515                              uint32_t                 xor);
 516
 517 /* Specific implementations */
 518 pixman_implementation_t *
 519 _pixman_implementation_create_general (void);
 520
 521 pixman_implementation_t *
 522 _pixman_implementation_create_fast_path (void);
 523
 524 #ifdef USE_MMX
 525 pixman_implementation_t *
 526 _pixman_implementation_create_mmx (void);
 527 #endif
 528
 529 #ifdef USE_SSE2
 530 pixman_implementation_t *
 531 _pixman_implementation_create_sse2 (void);
 532 #endif
 533
 534 #ifdef USE_ARM_SIMD
 535 pixman_implementation_t *
 536 _pixman_implementation_create_arm_simd (void);
 537 #endif
 538
 539 #ifdef USE_ARM_NEON
 540 pixman_implementation_t *
 541 _pixman_implementation_create_arm_neon (void);
 542 #endif
 543
 544 #ifdef USE_VMX
 545 pixman_implementation_t *
 546 _pixman_implementation_create_vmx (void);
 547 #endif
 548
 549 pixman_implementation_t *
 550 _pixman_choose_implementation (void);
 551
 552
 553
 554 /*
 555  * Utilities
 556  */
 557
 558 /* These "formats" all have depth 0, so they
 559  * will never clash with any real ones
 560  */
 561 #define PIXMAN_null             PIXMAN_FORMAT (0, 0, 0, 0, 0, 0)
 562 #define PIXMAN_solid            PIXMAN_FORMAT (0, 1, 0, 0, 0, 0)
 563 #define PIXMAN_pixbuf           PIXMAN_FORMAT (0, 2, 0, 0, 0, 0)
 564 #define PIXMAN_rpixbuf          PIXMAN_FORMAT (0, 3, 0, 0, 0, 0)
 565 #define PIXMAN_unknown          PIXMAN_FORMAT (0, 4, 0, 0, 0, 0)
 566 #define PIXMAN_any              PIXMAN_FORMAT (0, 5, 0, 0, 0, 0)
 567
 568 #define PIXMAN_OP_any           (PIXMAN_N_OPERATORS + 1)
 569
 570 #define FAST_PATH_ID_TRANSFORM                  (1 <<  0)
 571 #define FAST_PATH_NO_ALPHA_MAP                  (1 <<  1)
 572 #define FAST_PATH_NO_CONVOLUTION_FILTER         (1 <<  2)
 573 #define FAST_PATH_NO_PAD_REPEAT                 (1 <<  3)
 574 #define FAST_PATH_NO_REFLECT_REPEAT             (1 <<  4)
 575 #define FAST_PATH_NO_ACCESSORS                  (1 <<  5)
 576 #define FAST_PATH_NARROW_FORMAT                 (1 <<  6)
 577 #define FAST_PATH_COMPONENT_ALPHA               (1 <<  8)
 578 #define FAST_PATH_SAMPLES_OPAQUE                (1 <<  7)
 579 #define FAST_PATH_UNIFIED_ALPHA                 (1 <<  9)
 580 #define FAST_PATH_SCALE_TRANSFORM               (1 << 10)
 581 #define FAST_PATH_NEAREST_FILTER                (1 << 11)
 582 #define FAST_PATH_HAS_TRANSFORM                 (1 << 12)
 583 #define FAST_PATH_IS_OPAQUE                     (1 << 13)
 584 #define FAST_PATH_NO_NORMAL_REPEAT              (1 << 14)
 585 #define FAST_PATH_NO_NONE_REPEAT                (1 << 15)
 586 #define FAST_PATH_SAMPLES_COVER_CLIP            (1 << 16)
 587 #define FAST_PATH_X_UNIT_POSITIVE               (1 << 17)
 588 #define FAST_PATH_AFFINE_TRANSFORM              (1 << 18)
 589 #define FAST_PATH_Y_UNIT_ZERO                   (1 << 19)
 590 #define FAST_PATH_BILINEAR_FILTER               (1 << 20)
 591
 592 #define FAST_PATH_PAD_REPEAT                                            \
 593     (FAST_PATH_NO_NONE_REPEAT           |                               \
 594      FAST_PATH_NO_NORMAL_REPEAT         |                               \
 595      FAST_PATH_NO_REFLECT_REPEAT)
 596
 597 #define FAST_PATH_NORMAL_REPEAT                                         \
 598     (FAST_PATH_NO_NONE_REPEAT           |                               \
 599      FAST_PATH_NO_PAD_REPEAT            |                               \
 600      FAST_PATH_NO_REFLECT_REPEAT)
 601
 602 #define FAST_PATH_NONE_REPEAT                                           \
 603     (FAST_PATH_NO_NORMAL_REPEAT         |                               \
 604      FAST_PATH_NO_PAD_REPEAT            |                               \
 605      FAST_PATH_NO_REFLECT_REPEAT)
 606
 607 #define FAST_PATH_REFLECT_REPEAT                                        \
 608     (FAST_PATH_NO_NONE_REPEAT           |                               \
 609      FAST_PATH_NO_NORMAL_REPEAT         |                               \
 610      FAST_PATH_NO_PAD_REPEAT)
 611
 612 #define FAST_PATH_STANDARD_FLAGS                                        \
 613     (FAST_PATH_NO_CONVOLUTION_FILTER    |                               \
 614      FAST_PATH_NO_ACCESSORS             |                               \
 615      FAST_PATH_NO_ALPHA_MAP             |                               \
 616      FAST_PATH_NARROW_FORMAT)
 617
 618 #define FAST_PATH_STD_DEST_FLAGS                                        \
 619     (FAST_PATH_NO_ACCESSORS             |                               \
 620      FAST_PATH_NO_ALPHA_MAP             |                               \
 621      FAST_PATH_NARROW_FORMAT)
 622
 623 #define SOURCE_FLAGS(format)                                            \
 624     (FAST_PATH_STANDARD_FLAGS |                                         \
 625      ((PIXMAN_ ## format == PIXMAN_solid) ?                             \
 626       0 : (FAST_PATH_SAMPLES_COVER_CLIP | FAST_PATH_ID_TRANSFORM)))
 627
 628 #define MASK_FLAGS(format, extra)                                       \
 629     ((PIXMAN_ ## format == PIXMAN_null) ? 0 : (SOURCE_FLAGS (format) | extra))
 630
 631 #define FAST_PATH(op, src, src_flags, mask, mask_flags, dest, dest_flags, func) \
 632     PIXMAN_OP_ ## op,                                                   \
 633     PIXMAN_ ## src,                                                     \
 634     src_flags,                                                          \
 635     PIXMAN_ ## mask,                                                    \
 636     mask_flags,                                                         \
 637     PIXMAN_ ## dest,                                                    \
 638     dest_flags,                                                         \
 639     func
 640
 641 #define PIXMAN_STD_FAST_PATH(op, src, mask, dest, func)                 \
 642     { FAST_PATH (                                                       \
 643             op,                                                         \
 644             src,  SOURCE_FLAGS (src),                                   \
 645             mask, MASK_FLAGS (mask, FAST_PATH_UNIFIED_ALPHA),           \
 646             dest, FAST_PATH_STD_DEST_FLAGS,                             \
 647             func) }
 648
 649 #define PIXMAN_STD_FAST_PATH_CA(op, src, mask, dest, func)              \
 650     { FAST_PATH (                                                       \
 651             op,                                                         \
 652             src,  SOURCE_FLAGS (src),                                   \
 653             mask, MASK_FLAGS (mask, FAST_PATH_COMPONENT_ALPHA),         \
 654             dest, FAST_PATH_STD_DEST_FLAGS,                             \
 655             func) }
 656
 657 /* Memory allocation helpers */
 658 void *
 659 pixman_malloc_ab (unsigned int n, unsigned int b);
 660
 661 void *
 662 pixman_malloc_abc (unsigned int a, unsigned int b, unsigned int c);
 663
 664 pixman_bool_t
 665 pixman_multiply_overflows_int (unsigned int a, unsigned int b);
 666
 667 pixman_bool_t
 668 pixman_addition_overflows_int (unsigned int a, unsigned int b);
 669
 670 /* Compositing utilities */
 671 void
 672 pixman_expand (uint64_t *           dst,
 673                const uint32_t *     src,
 674                pixman_format_code_t format,
 675                int                  width);
 676
 677 void
 678 pixman_contract (uint32_t *      dst,
 679                  const uint64_t *src,
 680                  int             width);
 681
 682
 683 /* Region Helpers */
 684 pixman_bool_t
 685 pixman_region32_copy_from_region16 (pixman_region32_t *dst,
 686                                     pixman_region16_t *src);
 687
 688 pixman_bool_t
 689 pixman_region16_copy_from_region32 (pixman_region16_t *dst,
 690                                     pixman_region32_t *src);
 691
 692
 693 /* Misc macros */
 694
 695 #ifndef FALSE
 696 #   define FALSE 0
 697 #endif
 698
 699 #ifndef TRUE
 700 #   define TRUE 1
 701 #endif
 702
 703 #ifndef MIN
 704 #  define MIN(a, b) ((a < b) ? a : b)
 705 #endif
 706
 707 #ifndef MAX
 708 #  define MAX(a, b) ((a > b) ? a : b)
 709 #endif
 710
 711 /* Integer division that rounds towards -infinity */
 712 #define DIV(a, b)                                          \
 713     ((((a) < 0) == ((b) < 0)) ? (a) / (b) :                \
 714      ((a) - (b) + 1 - (((b) < 0) << 1)) / (b))
 715
 716 /* Modulus that produces the remainder wrt. DIV */
 717 #define MOD(a, b) ((a) < 0 ? ((b) - ((-(a) - 1) % (b))) - 1 : (a) % (b))
 718
 719 #define CLIP(v, low, high) ((v) < (low) ? (low) : ((v) > (high) ? (high) : (v)))
 720
 721 /* Conversion between 8888 and 0565 */
 722
 723 #define CONVERT_8888_TO_0565(s)                                         \
 724     ((((s) >> 3) & 0x001f) |                                            \
 725      (((s) >> 5) & 0x07e0) |                                            \
 726      (((s) >> 8) & 0xf800))
 727
 728 #define CONVERT_0565_TO_0888(s)                                         \
 729     (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) |                       \
 730      ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) |                   \
 731      ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)))
 732
 733 #define CONVERT_0565_TO_8888(s) (CONVERT_0565_TO_0888(s) | 0xff000000)
 734
 735 /* Trivial versions that are useful in macros */
 736 #define CONVERT_8888_TO_8888(s) (s)
 737 #define CONVERT_0565_TO_0565(s) (s)
 738
 739 #define PIXMAN_FORMAT_IS_WIDE(f)                                        \
 740     (PIXMAN_FORMAT_A (f) > 8 ||                                         \
 741      PIXMAN_FORMAT_R (f) > 8 ||                                         \
 742      PIXMAN_FORMAT_G (f) > 8 ||                                         \
 743      PIXMAN_FORMAT_B (f) > 8)
 744
 745 #ifdef WORDS_BIGENDIAN
 746 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) << (n))
 747 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) >> (n))
 748 #else
 749 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) >> (n))
 750 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) << (n))
 751 #endif
 752
 753 /*
 754  * Various debugging code
 755  */
 756
 757 #undef DEBUG
 758
 759 #define COMPILE_TIME_ASSERT(x)                                          \
 760     do { typedef int compile_time_assertion [(x)?1:-1]; } while (0)
 761
 762 /* Turn on debugging depending on what type of release this is
 763  */
 764 #if (((PIXMAN_VERSION_MICRO % 2) == 0) && ((PIXMAN_VERSION_MINOR % 2) == 1))
 765
 766 /* Debugging gets turned on for development releases because these
 767  * are the things that end up in bleeding edge distributions such
 768  * as Rawhide etc.
 769  *
 770  * For performance reasons we don't turn it on for stable releases or
 771  * random git checkouts. (Random git checkouts are often used for
 772  * performance work).
 773  */
 774
 775 #    define DEBUG
 776
 777 #endif
 778
 779 #ifdef DEBUG
 780
 781 void
 782 _pixman_log_error (const char *function, const char *message);
 783
 784 #define return_if_fail(expr)                                            \
 785     do                                                                  \
 786     {                                                                   \
 787         if (!(expr))                                                    \
 788         {                                                               \
 789             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 790             return;                                                     \
 791         }                                                               \
 792     }                                                                   \
 793     while (0)
 794
 795 #define return_val_if_fail(expr, retval)                                \
 796     do                                                                  \
 797     {                                                                   \
 798         if (!(expr))                                                    \
 799         {                                                               \
 800             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 801             return (retval);                                            \
 802         }                                                               \
 803     }                                                                   \
 804     while (0)
 805
 806 #define critical_if_fail(expr)                                          \
 807     do                                                                  \
 808     {                                                                   \
 809         if (!(expr))                                                    \
 810             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 811     }                                                                   \
 812     while (0)
 813
 814
 815 #else
 816
 817 #define _pixman_log_error(f,m) do { } while (0)                         \
 818
 819 #define return_if_fail(expr)                                            \
 820     do                                                                  \
 821     {                                                                   \
 822         if (!(expr))                                                    \
 823             return;                                                     \
 824     }                                                                   \
 825     while (0)
 826
 827 #define return_val_if_fail(expr, retval)                                \
 828     do                                                                  \
 829     {                                                                   \
 830         if (!(expr))                                                    \
 831             return (retval);                                            \
 832     }                                                                   \
 833     while (0)
 834
 835 #define critical_if_fail(expr)                                          \
 836     do                                                                  \
 837     {                                                                   \
 838     }                                                                   \
 839     while (0)
 840 #endif
 841
 842 /*
 843  * Timers
 844  */
 845
 846 #ifdef PIXMAN_TIMERS
 847
 848 static inline uint64_t
 849 oil_profile_stamp_rdtsc (void)
 850 {
 851     uint64_t ts;
 852
 853     __asm__ __volatile__ ("rdtsc\n" : "=A" (ts));
 854     return ts;
 855 }
 856
 857 #define OIL_STAMP oil_profile_stamp_rdtsc
 858
 859 typedef struct pixman_timer_t pixman_timer_t;
 860
 861 struct pixman_timer_t
 862 {
 863     int             initialized;
 864     const char *    name;
 865     uint64_t        n_times;
 866     uint64_t        total;
 867     pixman_timer_t *next;
 868 };
 869
 870 extern int timer_defined;
 871
 872 void pixman_timer_register (pixman_timer_t *timer);
 873
 874 #define TIMER_BEGIN(tname)                                              \
 875     {                                                                   \
 876         static pixman_timer_t timer ## tname;                           \
 877         uint64_t              begin ## tname;                           \
 878                                                                         \
 879         if (!timer ## tname.initialized)                                \
 880         {                                                               \
 881             timer ## tname.initialized = 1;                             \
 882             timer ## tname.name = # tname;                              \
 883             pixman_timer_register (&timer ## tname);                    \
 884         }                                                               \
 885                                                                         \
 886         timer ## tname.n_times++;                                       \
 887         begin ## tname = OIL_STAMP ();
 888
 889 #define TIMER_END(tname)                                                \
 890     timer ## tname.total += OIL_STAMP () - begin ## tname;              \
 891     }
 892
 893 #endif /* PIXMAN_TIMERS */
 894
 895 #endif /* PIXMAN_PRIVATE_H */