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 void (*property_changed_func_t) (pixman_image_t *image);
  64
  65 struct image_common
  66 {
  67     image_type_t                type;
  68     int32_t                     ref_count;
  69     pixman_region32_t           clip_region;
  70     int32_t                     alpha_count;        /* How many times this image is being used as an alpha map */
  71     pixman_bool_t               have_clip_region;   /* FALSE if there is no clip */
  72     pixman_bool_t               client_clip;        /* Whether the source clip was
  73                                                        set by a client */
  74     pixman_bool_t               clip_sources;       /* Whether the clip applies when
  75                                                      * the image is used as a source
  76                                                      */
  77     pixman_bool_t               dirty;
  78     pixman_transform_t *        transform;
  79     pixman_repeat_t             repeat;
  80     pixman_filter_t             filter;
  81     pixman_fixed_t *            filter_params;
  82     int                         n_filter_params;
  83     bits_image_t *              alpha_map;
  84     int                         alpha_origin_x;
  85     int                         alpha_origin_y;
  86     pixman_bool_t               component_alpha;
  87     property_changed_func_t     property_changed;
  88
  89     pixman_image_destroy_func_t destroy_func;
  90     void *                      destroy_data;
  91
  92     uint32_t                    flags;
  93     pixman_format_code_t        extended_format_code;
  94 };
  95
  96 struct solid_fill
  97 {
  98     image_common_t common;
  99     pixman_color_t color;
 100
 101     uint32_t       color_32;
 102     uint64_t       color_64;
 103 };
 104
 105 struct gradient
 106 {
 107     image_common_t          common;
 108     int                     n_stops;
 109     pixman_gradient_stop_t *stops;
 110 };
 111
 112 struct linear_gradient
 113 {
 114     gradient_t           common;
 115     pixman_point_fixed_t p1;
 116     pixman_point_fixed_t p2;
 117 };
 118
 119 struct circle
 120 {
 121     pixman_fixed_t x;
 122     pixman_fixed_t y;
 123     pixman_fixed_t radius;
 124 };
 125
 126 struct radial_gradient
 127 {
 128     gradient_t common;
 129
 130     circle_t   c1;
 131     circle_t   c2;
 132
 133     circle_t   delta;
 134     double     a;
 135     double     inva;
 136     double     mindr;
 137 };
 138
 139 struct conical_gradient
 140 {
 141     gradient_t           common;
 142     pixman_point_fixed_t center;
 143     double               angle;
 144 };
 145
 146 struct bits_image
 147 {
 148     image_common_t             common;
 149     pixman_format_code_t       format;
 150     const pixman_indexed_t *   indexed;
 151     int                        width;
 152     int                        height;
 153     uint32_t *                 bits;
 154     uint32_t *                 free_me;
 155     int                        rowstride;  /* in number of uint32_t's */
 156
 157     fetch_scanline_t           get_scanline_32;
 158     fetch_scanline_t           get_scanline_64;
 159
 160     fetch_scanline_t           fetch_scanline_32;
 161     fetch_pixel_32_t           fetch_pixel_32;
 162     store_scanline_t           store_scanline_32;
 163
 164     fetch_scanline_t           fetch_scanline_64;
 165     fetch_pixel_64_t           fetch_pixel_64;
 166     store_scanline_t           store_scanline_64;
 167
 168     /* Used for indirect access to the bits */
 169     pixman_read_memory_func_t  read_func;
 170     pixman_write_memory_func_t write_func;
 171 };
 172
 173 union pixman_image
 174 {
 175     image_type_t       type;
 176     image_common_t     common;
 177     bits_image_t       bits;
 178     gradient_t         gradient;
 179     linear_gradient_t  linear;
 180     conical_gradient_t conical;
 181     radial_gradient_t  radial;
 182     solid_fill_t       solid;
 183 };
 184
 185 typedef struct pixman_iter_t pixman_iter_t;
 186 typedef enum
 187 {
 188     ITER_NARROW =               (1 << 0),
 189
 190     /* "Localized alpha" is when the alpha channel is used only to compute
 191      * the alpha value of the destination. This means that the computation
 192      * of the RGB values of the result is independent of the alpha value.
 193      *
 194      * For example, the OVER operator has localized alpha for the
 195      * destination, because the RGB values of the result can be computed
 196      * without knowing the destination alpha. Similarly, ADD has localized
 197      * alpha for both source and destination because the RGB values of the
 198      * result can be computed without knowing the alpha value of source or
 199      * destination.
 200      *
 201      * When he destination is xRGB, this is useful knowledge, because then
 202      * we can treat it as if it were ARGB, which means in some cases we can
 203      * avoid copying it to a temporary buffer.
 204      */
 205     ITER_LOCALIZED_ALPHA =      (1 << 1)
 206 } iter_flags_t;
 207
 208 struct pixman_iter_t
 209 {
 210     uint32_t *(* get_scanline) (pixman_iter_t *iter, const uint32_t *mask);
 211     void      (* write_back)   (pixman_iter_t *iter);
 212
 213     pixman_image_t *    image;
 214     uint32_t *          buffer;
 215     int                 x, y;
 216     int                 width;
 217 };
 218
 219 void
 220 _pixman_bits_image_setup_accessors (bits_image_t *image);
 221
 222 void
 223 _pixman_bits_image_src_iter_init (pixman_image_t *image,
 224                                   pixman_iter_t *iter,
 225                                   int x, int y, int width, int height,
 226                                   uint8_t *buffer, iter_flags_t flags);
 227 void
 228 _pixman_bits_image_dest_iter_init (pixman_image_t *image,
 229                                    pixman_iter_t *iter,
 230                                    int x, int y, int width, int height,
 231                                    uint8_t *buffer, iter_flags_t flags);
 232
 233 void
 234 _pixman_solid_fill_iter_init (pixman_image_t *image,
 235                               pixman_iter_t  *iter,
 236                               int x, int y, int width, int height,
 237                               uint8_t *buffer, iter_flags_t flags);
 238
 239 void
 240 _pixman_linear_gradient_iter_init (pixman_image_t *image,
 241                                    pixman_iter_t  *iter,
 242                                    int x, int y, int width, int height,
 243                                    uint8_t *buffer, iter_flags_t flags);
 244
 245 void
 246 _pixman_radial_gradient_iter_init (pixman_image_t *image,
 247                                    pixman_iter_t *iter,
 248                                    int x, int y, int width, int height,
 249                                    uint8_t *buffer, iter_flags_t flags);
 250
 251 void
 252 _pixman_conical_gradient_iter_init (pixman_image_t *image,
 253                                     pixman_iter_t *iter,
 254                                     int x, int y, int width, int height,
 255                                     uint8_t *buffer, iter_flags_t flags);
 256
 257 pixman_image_t *
 258 _pixman_image_allocate (void);
 259
 260 pixman_bool_t
 261 _pixman_init_gradient (gradient_t *                  gradient,
 262                        const pixman_gradient_stop_t *stops,
 263                        int                           n_stops);
 264 void
 265 _pixman_image_reset_clip_region (pixman_image_t *image);
 266
 267 void
 268 _pixman_image_validate (pixman_image_t *image);
 269
 270 #define PIXMAN_IMAGE_GET_LINE(image, x, y, type, out_stride, line, mul) \
 271     do                                                                  \
 272     {                                                                   \
 273         uint32_t *__bits__;                                             \
 274         int       __stride__;                                           \
 275                                                                         \
 276         __bits__ = image->bits.bits;                                    \
 277         __stride__ = image->bits.rowstride;                             \
 278         (out_stride) =                                                  \
 279             __stride__ * (int) sizeof (uint32_t) / (int) sizeof (type); \
 280         (line) =                                                        \
 281             ((type *) __bits__) + (out_stride) * (y) + (mul) * (x);     \
 282     } while (0)
 283
 284 /*
 285  * Gradient walker
 286  */
 287 typedef struct
 288 {
 289     uint32_t                left_ag;
 290     uint32_t                left_rb;
 291     uint32_t                right_ag;
 292     uint32_t                right_rb;
 293     int32_t                 left_x;
 294     int32_t                 right_x;
 295     int32_t                 stepper;
 296
 297     pixman_gradient_stop_t *stops;
 298     int                     num_stops;
 299     unsigned int            spread;
 300
 301     int                     need_reset;
 302 } pixman_gradient_walker_t;
 303
 304 void
 305 _pixman_gradient_walker_init (pixman_gradient_walker_t *walker,
 306                               gradient_t *              gradient,
 307                               unsigned int              spread);
 308
 309 void
 310 _pixman_gradient_walker_reset (pixman_gradient_walker_t *walker,
 311                                pixman_fixed_32_32_t      pos);
 312
 313 uint32_t
 314 _pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker,
 315                                pixman_fixed_32_32_t      x);
 316
 317 /*
 318  * Edges
 319  */
 320
 321 #define MAX_ALPHA(n)    ((1 << (n)) - 1)
 322 #define N_Y_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) - 1)
 323 #define N_X_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) + 1)
 324
 325 #define STEP_Y_SMALL(n) (pixman_fixed_1 / N_Y_FRAC (n))
 326 #define STEP_Y_BIG(n)   (pixman_fixed_1 - (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 327
 328 #define Y_FRAC_FIRST(n) (STEP_Y_BIG (n) / 2)
 329 #define Y_FRAC_LAST(n)  (Y_FRAC_FIRST (n) + (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 330
 331 #define STEP_X_SMALL(n) (pixman_fixed_1 / N_X_FRAC (n))
 332 #define STEP_X_BIG(n)   (pixman_fixed_1 - (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 333
 334 #define X_FRAC_FIRST(n) (STEP_X_BIG (n) / 2)
 335 #define X_FRAC_LAST(n)  (X_FRAC_FIRST (n) + (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 336
 337 #define RENDER_SAMPLES_X(x, n)                                          \
 338     ((n) == 1? 0 : (pixman_fixed_frac (x) +                             \
 339                     X_FRAC_FIRST (n)) / STEP_X_SMALL (n))
 340
 341 void
 342 pixman_rasterize_edges_accessors (pixman_image_t *image,
 343                                   pixman_edge_t * l,
 344                                   pixman_edge_t * r,
 345                                   pixman_fixed_t  t,
 346                                   pixman_fixed_t  b);
 347
 348 /*
 349  * Implementations
 350  */
 351 typedef struct pixman_implementation_t pixman_implementation_t;
 352
 353 typedef void (*pixman_combine_32_func_t) (pixman_implementation_t *imp,
 354                                           pixman_op_t              op,
 355                                           uint32_t *               dest,
 356                                           const uint32_t *         src,
 357                                           const uint32_t *         mask,
 358                                           int                      width);
 359
 360 typedef void (*pixman_combine_64_func_t) (pixman_implementation_t *imp,
 361                                           pixman_op_t              op,
 362                                           uint64_t *               dest,
 363                                           const uint64_t *         src,
 364                                           const uint64_t *         mask,
 365                                           int                      width);
 366
 367 typedef void (*pixman_composite_func_t) (pixman_implementation_t *imp,
 368                                          pixman_op_t              op,
 369                                          pixman_image_t *         src,
 370                                          pixman_image_t *         mask,
 371                                          pixman_image_t *         dest,
 372                                          int32_t                  src_x,
 373                                          int32_t                  src_y,
 374                                          int32_t                  mask_x,
 375                                          int32_t                  mask_y,
 376                                          int32_t                  dest_x,
 377                                          int32_t                  dest_y,
 378                                          int32_t                  width,
 379                                          int32_t                  height);
 380 typedef pixman_bool_t (*pixman_blt_func_t) (pixman_implementation_t *imp,
 381                                             uint32_t *               src_bits,
 382                                             uint32_t *               dst_bits,
 383                                             int                      src_stride,
 384                                             int                      dst_stride,
 385                                             int                      src_bpp,
 386                                             int                      dst_bpp,
 387                                             int                      src_x,
 388                                             int                      src_y,
 389                                             int                      dst_x,
 390                                             int                      dst_y,
 391                                             int                      width,
 392                                             int                      height);
 393 typedef pixman_bool_t (*pixman_fill_func_t) (pixman_implementation_t *imp,
 394                                              uint32_t *               bits,
 395                                              int                      stride,
 396                                              int                      bpp,
 397                                              int                      x,
 398                                              int                      y,
 399                                              int                      width,
 400                                              int                      height,
 401                                              uint32_t                 xor);
 402 typedef void (*pixman_iter_init_func_t) (pixman_implementation_t *imp,
 403                                          pixman_iter_t           *iter,
 404                                          pixman_image_t          *image,
 405                                          int                      x,
 406                                          int                      y,
 407                                          int                      width,
 408                                          int                      height,
 409                                          uint8_t                 *buffer,
 410                                          iter_flags_t             flags);
 411
 412 void _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp);
 413 void _pixman_setup_combiner_functions_64 (pixman_implementation_t *imp);
 414
 415 typedef struct
 416 {
 417     pixman_op_t             op;
 418     pixman_format_code_t    src_format;
 419     uint32_t                src_flags;
 420     pixman_format_code_t    mask_format;
 421     uint32_t                mask_flags;
 422     pixman_format_code_t    dest_format;
 423     uint32_t                dest_flags;
 424     pixman_composite_func_t func;
 425 } pixman_fast_path_t;
 426
 427 struct pixman_implementation_t
 428 {
 429     pixman_implementation_t *   toplevel;
 430     pixman_implementation_t *   delegate;
 431     const pixman_fast_path_t *  fast_paths;
 432
 433     pixman_blt_func_t           blt;
 434     pixman_fill_func_t          fill;
 435     pixman_iter_init_func_t     src_iter_init;
 436     pixman_iter_init_func_t     dest_iter_init;
 437
 438     pixman_combine_32_func_t    combine_32[PIXMAN_N_OPERATORS];
 439     pixman_combine_32_func_t    combine_32_ca[PIXMAN_N_OPERATORS];
 440     pixman_combine_64_func_t    combine_64[PIXMAN_N_OPERATORS];
 441     pixman_combine_64_func_t    combine_64_ca[PIXMAN_N_OPERATORS];
 442 };
 443
 444 uint32_t
 445 _pixman_image_get_solid (pixman_implementation_t *imp,
 446                          pixman_image_t *         image,
 447                          pixman_format_code_t     format);
 448
 449 pixman_implementation_t *
 450 _pixman_implementation_create (pixman_implementation_t *delegate,
 451                                const pixman_fast_path_t *fast_paths);
 452
 453 void
 454 _pixman_implementation_combine_32 (pixman_implementation_t *imp,
 455                                    pixman_op_t              op,
 456                                    uint32_t *               dest,
 457                                    const uint32_t *         src,
 458                                    const uint32_t *         mask,
 459                                    int                      width);
 460 void
 461 _pixman_implementation_combine_64 (pixman_implementation_t *imp,
 462                                    pixman_op_t              op,
 463                                    uint64_t *               dest,
 464                                    const uint64_t *         src,
 465                                    const uint64_t *         mask,
 466                                    int                      width);
 467 void
 468 _pixman_implementation_combine_32_ca (pixman_implementation_t *imp,
 469                                       pixman_op_t              op,
 470                                       uint32_t *               dest,
 471                                       const uint32_t *         src,
 472                                       const uint32_t *         mask,
 473                                       int                      width);
 474 void
 475 _pixman_implementation_combine_64_ca (pixman_implementation_t *imp,
 476                                       pixman_op_t              op,
 477                                       uint64_t *               dest,
 478                                       const uint64_t *         src,
 479                                       const uint64_t *         mask,
 480                                       int                      width);
 481
 482 pixman_bool_t
 483 _pixman_implementation_blt (pixman_implementation_t *imp,
 484                             uint32_t *               src_bits,
 485                             uint32_t *               dst_bits,
 486                             int                      src_stride,
 487                             int                      dst_stride,
 488                             int                      src_bpp,
 489                             int                      dst_bpp,
 490                             int                      src_x,
 491                             int                      src_y,
 492                             int                      dst_x,
 493                             int                      dst_y,
 494                             int                      width,
 495                             int                      height);
 496
 497 pixman_bool_t
 498 _pixman_implementation_fill (pixman_implementation_t *imp,
 499                              uint32_t *               bits,
 500                              int                      stride,
 501                              int                      bpp,
 502                              int                      x,
 503                              int                      y,
 504                              int                      width,
 505                              int                      height,
 506                              uint32_t                 xor);
 507
 508 void
 509 _pixman_implementation_src_iter_init (pixman_implementation_t       *imp,
 510                                       pixman_iter_t                 *iter,
 511                                       pixman_image_t                *image,
 512                                       int                            x,
 513                                       int                            y,
 514                                       int                            width,
 515                                       int                            height,
 516                                       uint8_t                       *buffer,
 517                                       iter_flags_t                   flags);
 518
 519 void
 520 _pixman_implementation_dest_iter_init (pixman_implementation_t       *imp,
 521                                        pixman_iter_t                 *iter,
 522                                        pixman_image_t                *image,
 523                                        int                            x,
 524                                        int                            y,
 525                                        int                            width,
 526                                        int                            height,
 527                                        uint8_t                       *buffer,
 528                                        iter_flags_t                   flags);
 529
 530 /* Specific implementations */
 531 pixman_implementation_t *
 532 _pixman_implementation_create_general (void);
 533
 534 pixman_implementation_t *
 535 _pixman_implementation_create_fast_path (void);
 536
 537 #ifdef USE_MMX
 538 pixman_implementation_t *
 539 _pixman_implementation_create_mmx (void);
 540 #endif
 541
 542 #ifdef USE_SSE2
 543 pixman_implementation_t *
 544 _pixman_implementation_create_sse2 (void);
 545 #endif
 546
 547 #ifdef USE_ARM_SIMD
 548 pixman_implementation_t *
 549 _pixman_implementation_create_arm_simd (void);
 550 #endif
 551
 552 #ifdef USE_ARM_NEON
 553 pixman_implementation_t *
 554 _pixman_implementation_create_arm_neon (void);
 555 #endif
 556
 557 #ifdef USE_VMX
 558 pixman_implementation_t *
 559 _pixman_implementation_create_vmx (void);
 560 #endif
 561
 562 pixman_implementation_t *
 563 _pixman_choose_implementation (void);
 564
 565
 566
 567 /*
 568  * Utilities
 569  */
 570 uint32_t *
 571 _pixman_iter_get_scanline_noop (pixman_iter_t *iter, const uint32_t *mask);
 572
 573 /* These "formats" all have depth 0, so they
 574  * will never clash with any real ones
 575  */
 576 #define PIXMAN_null             PIXMAN_FORMAT (0, 0, 0, 0, 0, 0)
 577 #define PIXMAN_solid            PIXMAN_FORMAT (0, 1, 0, 0, 0, 0)
 578 #define PIXMAN_pixbuf           PIXMAN_FORMAT (0, 2, 0, 0, 0, 0)
 579 #define PIXMAN_rpixbuf          PIXMAN_FORMAT (0, 3, 0, 0, 0, 0)
 580 #define PIXMAN_unknown          PIXMAN_FORMAT (0, 4, 0, 0, 0, 0)
 581 #define PIXMAN_any              PIXMAN_FORMAT (0, 5, 0, 0, 0, 0)
 582
 583 #define PIXMAN_OP_any           (PIXMAN_N_OPERATORS + 1)
 584
 585 #define FAST_PATH_ID_TRANSFORM                  (1 <<  0)
 586 #define FAST_PATH_NO_ALPHA_MAP                  (1 <<  1)
 587 #define FAST_PATH_NO_CONVOLUTION_FILTER         (1 <<  2)
 588 #define FAST_PATH_NO_PAD_REPEAT                 (1 <<  3)
 589 #define FAST_PATH_NO_REFLECT_REPEAT             (1 <<  4)
 590 #define FAST_PATH_NO_ACCESSORS                  (1 <<  5)
 591 #define FAST_PATH_NARROW_FORMAT                 (1 <<  6)
 592 #define FAST_PATH_COMPONENT_ALPHA               (1 <<  8)
 593 #define FAST_PATH_SAMPLES_OPAQUE                (1 <<  7)
 594 #define FAST_PATH_UNIFIED_ALPHA                 (1 <<  9)
 595 #define FAST_PATH_SCALE_TRANSFORM               (1 << 10)
 596 #define FAST_PATH_NEAREST_FILTER                (1 << 11)
 597 #define FAST_PATH_HAS_TRANSFORM                 (1 << 12)
 598 #define FAST_PATH_IS_OPAQUE                     (1 << 13)
 599 #define FAST_PATH_NO_NORMAL_REPEAT              (1 << 14)
 600 #define FAST_PATH_NO_NONE_REPEAT                (1 << 15)
 601 #define FAST_PATH_SAMPLES_COVER_CLIP            (1 << 16)
 602 #define FAST_PATH_X_UNIT_POSITIVE               (1 << 17)
 603 #define FAST_PATH_AFFINE_TRANSFORM              (1 << 18)
 604 #define FAST_PATH_Y_UNIT_ZERO                   (1 << 19)
 605 #define FAST_PATH_BILINEAR_FILTER               (1 << 20)
 606
 607 #define FAST_PATH_PAD_REPEAT                                            \
 608     (FAST_PATH_NO_NONE_REPEAT           |                               \
 609      FAST_PATH_NO_NORMAL_REPEAT         |                               \
 610      FAST_PATH_NO_REFLECT_REPEAT)
 611
 612 #define FAST_PATH_NORMAL_REPEAT                                         \
 613     (FAST_PATH_NO_NONE_REPEAT           |                               \
 614      FAST_PATH_NO_PAD_REPEAT            |                               \
 615      FAST_PATH_NO_REFLECT_REPEAT)
 616
 617 #define FAST_PATH_NONE_REPEAT                                           \
 618     (FAST_PATH_NO_NORMAL_REPEAT         |                               \
 619      FAST_PATH_NO_PAD_REPEAT            |                               \
 620      FAST_PATH_NO_REFLECT_REPEAT)
 621
 622 #define FAST_PATH_REFLECT_REPEAT                                        \
 623     (FAST_PATH_NO_NONE_REPEAT           |                               \
 624      FAST_PATH_NO_NORMAL_REPEAT         |                               \
 625      FAST_PATH_NO_PAD_REPEAT)
 626
 627 #define FAST_PATH_STANDARD_FLAGS                                        \
 628     (FAST_PATH_NO_CONVOLUTION_FILTER    |                               \
 629      FAST_PATH_NO_ACCESSORS             |                               \
 630      FAST_PATH_NO_ALPHA_MAP             |                               \
 631      FAST_PATH_NARROW_FORMAT)
 632
 633 #define FAST_PATH_STD_DEST_FLAGS                                        \
 634     (FAST_PATH_NO_ACCESSORS             |                               \
 635      FAST_PATH_NO_ALPHA_MAP             |                               \
 636      FAST_PATH_NARROW_FORMAT)
 637
 638 #define SOURCE_FLAGS(format)                                            \
 639     (FAST_PATH_STANDARD_FLAGS |                                         \
 640      ((PIXMAN_ ## format == PIXMAN_solid) ?                             \
 641       0 : (FAST_PATH_SAMPLES_COVER_CLIP | FAST_PATH_ID_TRANSFORM)))
 642
 643 #define MASK_FLAGS(format, extra)                                       \
 644     ((PIXMAN_ ## format == PIXMAN_null) ? 0 : (SOURCE_FLAGS (format) | extra))
 645
 646 #define FAST_PATH(op, src, src_flags, mask, mask_flags, dest, dest_flags, func) \
 647     PIXMAN_OP_ ## op,                                                   \
 648     PIXMAN_ ## src,                                                     \
 649     src_flags,                                                          \
 650     PIXMAN_ ## mask,                                                    \
 651     mask_flags,                                                         \
 652     PIXMAN_ ## dest,                                                    \
 653     dest_flags,                                                         \
 654     func
 655
 656 #define PIXMAN_STD_FAST_PATH(op, src, mask, dest, func)                 \
 657     { FAST_PATH (                                                       \
 658             op,                                                         \
 659             src,  SOURCE_FLAGS (src),                                   \
 660             mask, MASK_FLAGS (mask, FAST_PATH_UNIFIED_ALPHA),           \
 661             dest, FAST_PATH_STD_DEST_FLAGS,                             \
 662             func) }
 663
 664 #define PIXMAN_STD_FAST_PATH_CA(op, src, mask, dest, func)              \
 665     { FAST_PATH (                                                       \
 666             op,                                                         \
 667             src,  SOURCE_FLAGS (src),                                   \
 668             mask, MASK_FLAGS (mask, FAST_PATH_COMPONENT_ALPHA),         \
 669             dest, FAST_PATH_STD_DEST_FLAGS,                             \
 670             func) }
 671
 672 /* Memory allocation helpers */
 673 void *
 674 pixman_malloc_ab (unsigned int n, unsigned int b);
 675
 676 void *
 677 pixman_malloc_abc (unsigned int a, unsigned int b, unsigned int c);
 678
 679 pixman_bool_t
 680 pixman_multiply_overflows_int (unsigned int a, unsigned int b);
 681
 682 pixman_bool_t
 683 pixman_addition_overflows_int (unsigned int a, unsigned int b);
 684
 685 /* Compositing utilities */
 686 void
 687 pixman_expand (uint64_t *           dst,
 688                const uint32_t *     src,
 689                pixman_format_code_t format,
 690                int                  width);
 691
 692 void
 693 pixman_contract (uint32_t *      dst,
 694                  const uint64_t *src,
 695                  int             width);
 696
 697
 698 /* Region Helpers */
 699 pixman_bool_t
 700 pixman_region32_copy_from_region16 (pixman_region32_t *dst,
 701                                     pixman_region16_t *src);
 702
 703 pixman_bool_t
 704 pixman_region16_copy_from_region32 (pixman_region16_t *dst,
 705                                     pixman_region32_t *src);
 706
 707
 708 /* Misc macros */
 709
 710 #ifndef FALSE
 711 #   define FALSE 0
 712 #endif
 713
 714 #ifndef TRUE
 715 #   define TRUE 1
 716 #endif
 717
 718 #ifndef MIN
 719 #  define MIN(a, b) ((a < b) ? a : b)
 720 #endif
 721
 722 #ifndef MAX
 723 #  define MAX(a, b) ((a > b) ? a : b)
 724 #endif
 725
 726 /* Integer division that rounds towards -infinity */
 727 #define DIV(a, b)                                          \
 728     ((((a) < 0) == ((b) < 0)) ? (a) / (b) :                \
 729      ((a) - (b) + 1 - (((b) < 0) << 1)) / (b))
 730
 731 /* Modulus that produces the remainder wrt. DIV */
 732 #define MOD(a, b) ((a) < 0 ? ((b) - ((-(a) - 1) % (b))) - 1 : (a) % (b))
 733
 734 #define CLIP(v, low, high) ((v) < (low) ? (low) : ((v) > (high) ? (high) : (v)))
 735
 736 /* Conversion between 8888 and 0565 */
 737
 738 #define CONVERT_8888_TO_0565(s)                                         \
 739     ((((s) >> 3) & 0x001f) |                                            \
 740      (((s) >> 5) & 0x07e0) |                                            \
 741      (((s) >> 8) & 0xf800))
 742
 743 #define CONVERT_0565_TO_0888(s)                                         \
 744     (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) |                       \
 745      ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) |                   \
 746      ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)))
 747
 748 #define CONVERT_0565_TO_8888(s) (CONVERT_0565_TO_0888(s) | 0xff000000)
 749
 750 /* Trivial versions that are useful in macros */
 751 #define CONVERT_8888_TO_8888(s) (s)
 752 #define CONVERT_0565_TO_0565(s) (s)
 753
 754 #define PIXMAN_FORMAT_IS_WIDE(f)                                        \
 755     (PIXMAN_FORMAT_A (f) > 8 ||                                         \
 756      PIXMAN_FORMAT_R (f) > 8 ||                                         \
 757      PIXMAN_FORMAT_G (f) > 8 ||                                         \
 758      PIXMAN_FORMAT_B (f) > 8)
 759
 760 #ifdef WORDS_BIGENDIAN
 761 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) << (n))
 762 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) >> (n))
 763 #else
 764 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) >> (n))
 765 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) << (n))
 766 #endif
 767
 768 /*
 769  * Various debugging code
 770  */
 771
 772 #undef DEBUG
 773
 774 #define COMPILE_TIME_ASSERT(x)                                          \
 775     do { typedef int compile_time_assertion [(x)?1:-1]; } while (0)
 776
 777 /* Turn on debugging depending on what type of release this is
 778  */
 779 #if (((PIXMAN_VERSION_MICRO % 2) == 0) && ((PIXMAN_VERSION_MINOR % 2) == 1))
 780
 781 /* Debugging gets turned on for development releases because these
 782  * are the things that end up in bleeding edge distributions such
 783  * as Rawhide etc.
 784  *
 785  * For performance reasons we don't turn it on for stable releases or
 786  * random git checkouts. (Random git checkouts are often used for
 787  * performance work).
 788  */
 789
 790 #    define DEBUG
 791
 792 #endif
 793
 794 #ifdef DEBUG
 795
 796 void
 797 _pixman_log_error (const char *function, const char *message);
 798
 799 #define return_if_fail(expr)                                            \
 800     do                                                                  \
 801     {                                                                   \
 802         if (!(expr))                                                    \
 803         {                                                               \
 804             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 805             return;                                                     \
 806         }                                                               \
 807     }                                                                   \
 808     while (0)
 809
 810 #define return_val_if_fail(expr, retval)                                \
 811     do                                                                  \
 812     {                                                                   \
 813         if (!(expr))                                                    \
 814         {                                                               \
 815             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 816             return (retval);                                            \
 817         }                                                               \
 818     }                                                                   \
 819     while (0)
 820
 821 #define critical_if_fail(expr)                                          \
 822     do                                                                  \
 823     {                                                                   \
 824         if (!(expr))                                                    \
 825             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 826     }                                                                   \
 827     while (0)
 828
 829
 830 #else
 831
 832 #define _pixman_log_error(f,m) do { } while (0)                         \
 833
 834 #define return_if_fail(expr)                                            \
 835     do                                                                  \
 836     {                                                                   \
 837         if (!(expr))                                                    \
 838             return;                                                     \
 839     }                                                                   \
 840     while (0)
 841
 842 #define return_val_if_fail(expr, retval)                                \
 843     do                                                                  \
 844     {                                                                   \
 845         if (!(expr))                                                    \
 846             return (retval);                                            \
 847     }                                                                   \
 848     while (0)
 849
 850 #define critical_if_fail(expr)                                          \
 851     do                                                                  \
 852     {                                                                   \
 853     }                                                                   \
 854     while (0)
 855 #endif
 856
 857 /*
 858  * Timers
 859  */
 860
 861 #ifdef PIXMAN_TIMERS
 862
 863 static inline uint64_t
 864 oil_profile_stamp_rdtsc (void)
 865 {
 866     uint64_t ts;
 867
 868     __asm__ __volatile__ ("rdtsc\n" : "=A" (ts));
 869     return ts;
 870 }
 871
 872 #define OIL_STAMP oil_profile_stamp_rdtsc
 873
 874 typedef struct pixman_timer_t pixman_timer_t;
 875
 876 struct pixman_timer_t
 877 {
 878     int             initialized;
 879     const char *    name;
 880     uint64_t        n_times;
 881     uint64_t        total;
 882     pixman_timer_t *next;
 883 };
 884
 885 extern int timer_defined;
 886
 887 void pixman_timer_register (pixman_timer_t *timer);
 888
 889 #define TIMER_BEGIN(tname)                                              \
 890     {                                                                   \
 891         static pixman_timer_t timer ## tname;                           \
 892         uint64_t              begin ## tname;                           \
 893                                                                         \
 894         if (!timer ## tname.initialized)                                \
 895         {                                                               \
 896             timer ## tname.initialized = 1;                             \
 897             timer ## tname.name = # tname;                              \
 898             pixman_timer_register (&timer ## tname);                    \
 899         }                                                               \
 900                                                                         \
 901         timer ## tname.n_times++;                                       \
 902         begin ## tname = OIL_STAMP ();
 903
 904 #define TIMER_END(tname)                                                \
 905     timer ## tname.total += OIL_STAMP () - begin ## tname;              \
 906     }
 907
 908 #endif /* PIXMAN_TIMERS */
 909
 910 #endif /* PIXMAN_PRIVATE_H */