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