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_IGNORE_ALPHA =         (1 << 2),
 207     ITER_IGNORE_RGB =           (1 << 3)
 208 } iter_flags_t;
 209
 210 struct pixman_iter_t
 211 {
 212     uint32_t *(* get_scanline) (pixman_iter_t *iter, const uint32_t *mask);
 213     void      (* write_back)   (pixman_iter_t *iter);
 214
 215     pixman_image_t *    image;
 216     uint32_t *          buffer;
 217     int                 x, y;
 218     int                 width;
 219 };
 220
 221 void
 222 _pixman_bits_image_setup_accessors (bits_image_t *image);
 223
 224 void
 225 _pixman_bits_image_src_iter_init (pixman_image_t *image,
 226                                   pixman_iter_t *iter,
 227                                   int x, int y, int width, int height,
 228                                   uint8_t *buffer, iter_flags_t flags);
 229 void
 230 _pixman_bits_image_dest_iter_init (pixman_image_t *image,
 231                                    pixman_iter_t *iter,
 232                                    int x, int y, int width, int height,
 233                                    uint8_t *buffer, iter_flags_t flags);
 234
 235 void
 236 _pixman_solid_fill_iter_init (pixman_image_t *image,
 237                               pixman_iter_t  *iter,
 238                               int x, int y, int width, int height,
 239                               uint8_t *buffer, iter_flags_t flags);
 240
 241 void
 242 _pixman_linear_gradient_iter_init (pixman_image_t *image,
 243                                    pixman_iter_t  *iter,
 244                                    int x, int y, int width, int height,
 245                                    uint8_t *buffer, iter_flags_t flags);
 246
 247 void
 248 _pixman_radial_gradient_iter_init (pixman_image_t *image,
 249                                    pixman_iter_t *iter,
 250                                    int x, int y, int width, int height,
 251                                    uint8_t *buffer, iter_flags_t flags);
 252
 253 void
 254 _pixman_conical_gradient_iter_init (pixman_image_t *image,
 255                                     pixman_iter_t *iter,
 256                                     int x, int y, int width, int height,
 257                                     uint8_t *buffer, iter_flags_t flags);
 258
 259 pixman_image_t *
 260 _pixman_image_allocate (void);
 261
 262 pixman_bool_t
 263 _pixman_init_gradient (gradient_t *                  gradient,
 264                        const pixman_gradient_stop_t *stops,
 265                        int                           n_stops);
 266 void
 267 _pixman_image_reset_clip_region (pixman_image_t *image);
 268
 269 void
 270 _pixman_image_validate (pixman_image_t *image);
 271
 272 #define PIXMAN_IMAGE_GET_LINE(image, x, y, type, out_stride, line, mul) \
 273     do                                                                  \
 274     {                                                                   \
 275         uint32_t *__bits__;                                             \
 276         int       __stride__;                                           \
 277                                                                         \
 278         __bits__ = image->bits.bits;                                    \
 279         __stride__ = image->bits.rowstride;                             \
 280         (out_stride) =                                                  \
 281             __stride__ * (int) sizeof (uint32_t) / (int) sizeof (type); \
 282         (line) =                                                        \
 283             ((type *) __bits__) + (out_stride) * (y) + (mul) * (x);     \
 284     } while (0)
 285
 286 /*
 287  * Gradient walker
 288  */
 289 typedef struct
 290 {
 291     uint32_t                left_ag;
 292     uint32_t                left_rb;
 293     uint32_t                right_ag;
 294     uint32_t                right_rb;
 295     int32_t                 left_x;
 296     int32_t                 right_x;
 297     int32_t                 stepper;
 298
 299     pixman_gradient_stop_t *stops;
 300     int                     num_stops;
 301     unsigned int            spread;
 302
 303     int                     need_reset;
 304 } pixman_gradient_walker_t;
 305
 306 void
 307 _pixman_gradient_walker_init (pixman_gradient_walker_t *walker,
 308                               gradient_t *              gradient,
 309                               unsigned int              spread);
 310
 311 void
 312 _pixman_gradient_walker_reset (pixman_gradient_walker_t *walker,
 313                                pixman_fixed_32_32_t      pos);
 314
 315 uint32_t
 316 _pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker,
 317                                pixman_fixed_32_32_t      x);
 318
 319 /*
 320  * Edges
 321  */
 322
 323 #define MAX_ALPHA(n)    ((1 << (n)) - 1)
 324 #define N_Y_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) - 1)
 325 #define N_X_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) + 1)
 326
 327 #define STEP_Y_SMALL(n) (pixman_fixed_1 / N_Y_FRAC (n))
 328 #define STEP_Y_BIG(n)   (pixman_fixed_1 - (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 329
 330 #define Y_FRAC_FIRST(n) (STEP_Y_BIG (n) / 2)
 331 #define Y_FRAC_LAST(n)  (Y_FRAC_FIRST (n) + (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 332
 333 #define STEP_X_SMALL(n) (pixman_fixed_1 / N_X_FRAC (n))
 334 #define STEP_X_BIG(n)   (pixman_fixed_1 - (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 335
 336 #define X_FRAC_FIRST(n) (STEP_X_BIG (n) / 2)
 337 #define X_FRAC_LAST(n)  (X_FRAC_FIRST (n) + (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 338
 339 #define RENDER_SAMPLES_X(x, n)                                          \
 340     ((n) == 1? 0 : (pixman_fixed_frac (x) +                             \
 341                     X_FRAC_FIRST (n)) / STEP_X_SMALL (n))
 342
 343 void
 344 pixman_rasterize_edges_accessors (pixman_image_t *image,
 345                                   pixman_edge_t * l,
 346                                   pixman_edge_t * r,
 347                                   pixman_fixed_t  t,
 348                                   pixman_fixed_t  b);
 349
 350 /*
 351  * Implementations
 352  */
 353 typedef struct pixman_implementation_t pixman_implementation_t;
 354
 355 typedef void (*pixman_combine_32_func_t) (pixman_implementation_t *imp,
 356                                           pixman_op_t              op,
 357                                           uint32_t *               dest,
 358                                           const uint32_t *         src,
 359                                           const uint32_t *         mask,
 360                                           int                      width);
 361
 362 typedef void (*pixman_combine_64_func_t) (pixman_implementation_t *imp,
 363                                           pixman_op_t              op,
 364                                           uint64_t *               dest,
 365                                           const uint64_t *         src,
 366                                           const uint64_t *         mask,
 367                                           int                      width);
 368
 369 typedef void (*pixman_composite_func_t) (pixman_implementation_t *imp,
 370                                          pixman_op_t              op,
 371                                          pixman_image_t *         src,
 372                                          pixman_image_t *         mask,
 373                                          pixman_image_t *         dest,
 374                                          int32_t                  src_x,
 375                                          int32_t                  src_y,
 376                                          int32_t                  mask_x,
 377                                          int32_t                  mask_y,
 378                                          int32_t                  dest_x,
 379                                          int32_t                  dest_y,
 380                                          int32_t                  width,
 381                                          int32_t                  height);
 382 typedef pixman_bool_t (*pixman_blt_func_t) (pixman_implementation_t *imp,
 383                                             uint32_t *               src_bits,
 384                                             uint32_t *               dst_bits,
 385                                             int                      src_stride,
 386                                             int                      dst_stride,
 387                                             int                      src_bpp,
 388                                             int                      dst_bpp,
 389                                             int                      src_x,
 390                                             int                      src_y,
 391                                             int                      dst_x,
 392                                             int                      dst_y,
 393                                             int                      width,
 394                                             int                      height);
 395 typedef pixman_bool_t (*pixman_fill_func_t) (pixman_implementation_t *imp,
 396                                              uint32_t *               bits,
 397                                              int                      stride,
 398                                              int                      bpp,
 399                                              int                      x,
 400                                              int                      y,
 401                                              int                      width,
 402                                              int                      height,
 403                                              uint32_t                 xor);
 404 typedef void (*pixman_iter_init_func_t) (pixman_implementation_t *imp,
 405                                          pixman_iter_t           *iter,
 406                                          pixman_image_t          *image,
 407                                          int                      x,
 408                                          int                      y,
 409                                          int                      width,
 410                                          int                      height,
 411                                          uint8_t                 *buffer,
 412                                          iter_flags_t             flags);
 413
 414 void _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp);
 415 void _pixman_setup_combiner_functions_64 (pixman_implementation_t *imp);
 416
 417 typedef struct
 418 {
 419     pixman_op_t             op;
 420     pixman_format_code_t    src_format;
 421     uint32_t                src_flags;
 422     pixman_format_code_t    mask_format;
 423     uint32_t                mask_flags;
 424     pixman_format_code_t    dest_format;
 425     uint32_t                dest_flags;
 426     pixman_composite_func_t func;
 427 } pixman_fast_path_t;
 428
 429 struct pixman_implementation_t
 430 {
 431     pixman_implementation_t *   toplevel;
 432     pixman_implementation_t *   delegate;
 433     const pixman_fast_path_t *  fast_paths;
 434
 435     pixman_blt_func_t           blt;
 436     pixman_fill_func_t          fill;
 437     pixman_iter_init_func_t     src_iter_init;
 438     pixman_iter_init_func_t     dest_iter_init;
 439
 440     pixman_combine_32_func_t    combine_32[PIXMAN_N_OPERATORS];
 441     pixman_combine_32_func_t    combine_32_ca[PIXMAN_N_OPERATORS];
 442     pixman_combine_64_func_t    combine_64[PIXMAN_N_OPERATORS];
 443     pixman_combine_64_func_t    combine_64_ca[PIXMAN_N_OPERATORS];
 444 };
 445
 446 uint32_t
 447 _pixman_image_get_solid (pixman_implementation_t *imp,
 448                          pixman_image_t *         image,
 449                          pixman_format_code_t     format);
 450
 451 pixman_implementation_t *
 452 _pixman_implementation_create (pixman_implementation_t *delegate,
 453                                const pixman_fast_path_t *fast_paths);
 454
 455 void
 456 _pixman_implementation_combine_32 (pixman_implementation_t *imp,
 457                                    pixman_op_t              op,
 458                                    uint32_t *               dest,
 459                                    const uint32_t *         src,
 460                                    const uint32_t *         mask,
 461                                    int                      width);
 462 void
 463 _pixman_implementation_combine_64 (pixman_implementation_t *imp,
 464                                    pixman_op_t              op,
 465                                    uint64_t *               dest,
 466                                    const uint64_t *         src,
 467                                    const uint64_t *         mask,
 468                                    int                      width);
 469 void
 470 _pixman_implementation_combine_32_ca (pixman_implementation_t *imp,
 471                                       pixman_op_t              op,
 472                                       uint32_t *               dest,
 473                                       const uint32_t *         src,
 474                                       const uint32_t *         mask,
 475                                       int                      width);
 476 void
 477 _pixman_implementation_combine_64_ca (pixman_implementation_t *imp,
 478                                       pixman_op_t              op,
 479                                       uint64_t *               dest,
 480                                       const uint64_t *         src,
 481                                       const uint64_t *         mask,
 482                                       int                      width);
 483
 484 pixman_bool_t
 485 _pixman_implementation_blt (pixman_implementation_t *imp,
 486                             uint32_t *               src_bits,
 487                             uint32_t *               dst_bits,
 488                             int                      src_stride,
 489                             int                      dst_stride,
 490                             int                      src_bpp,
 491                             int                      dst_bpp,
 492                             int                      src_x,
 493                             int                      src_y,
 494                             int                      dst_x,
 495                             int                      dst_y,
 496                             int                      width,
 497                             int                      height);
 498
 499 pixman_bool_t
 500 _pixman_implementation_fill (pixman_implementation_t *imp,
 501                              uint32_t *               bits,
 502                              int                      stride,
 503                              int                      bpp,
 504                              int                      x,
 505                              int                      y,
 506                              int                      width,
 507                              int                      height,
 508                              uint32_t                 xor);
 509
 510 void
 511 _pixman_implementation_src_iter_init (pixman_implementation_t       *imp,
 512                                       pixman_iter_t                 *iter,
 513                                       pixman_image_t                *image,
 514                                       int                            x,
 515                                       int                            y,
 516                                       int                            width,
 517                                       int                            height,
 518                                       uint8_t                       *buffer,
 519                                       iter_flags_t                   flags);
 520
 521 void
 522 _pixman_implementation_dest_iter_init (pixman_implementation_t       *imp,
 523                                        pixman_iter_t                 *iter,
 524                                        pixman_image_t                *image,
 525                                        int                            x,
 526                                        int                            y,
 527                                        int                            width,
 528                                        int                            height,
 529                                        uint8_t                       *buffer,
 530                                        iter_flags_t                   flags);
 531
 532 /* Specific implementations */
 533 pixman_implementation_t *
 534 _pixman_implementation_create_general (void);
 535
 536 pixman_implementation_t *
 537 _pixman_implementation_create_fast_path (pixman_implementation_t *fallback);
 538
 539 #ifdef USE_MMX
 540 pixman_implementation_t *
 541 _pixman_implementation_create_mmx (pixman_implementation_t *fallback);
 542 #endif
 543
 544 #ifdef USE_SSE2
 545 pixman_implementation_t *
 546 _pixman_implementation_create_sse2 (pixman_implementation_t *fallback);
 547 #endif
 548
 549 #ifdef USE_ARM_SIMD
 550 pixman_implementation_t *
 551 _pixman_implementation_create_arm_simd (pixman_implementation_t *fallback);
 552 #endif
 553
 554 #ifdef USE_ARM_NEON
 555 pixman_implementation_t *
 556 _pixman_implementation_create_arm_neon (pixman_implementation_t *fallback);
 557 #endif
 558
 559 #ifdef USE_VMX
 560 pixman_implementation_t *
 561 _pixman_implementation_create_vmx (pixman_implementation_t *fallback);
 562 #endif
 563
 564 pixman_implementation_t *
 565 _pixman_choose_implementation (void);
 566
 567
 568
 569 /*
 570  * Utilities
 571  */
 572 uint32_t *
 573 _pixman_iter_get_scanline_noop (pixman_iter_t *iter, const uint32_t *mask);
 574
 575 /* These "formats" all have depth 0, so they
 576  * will never clash with any real ones
 577  */
 578 #define PIXMAN_null             PIXMAN_FORMAT (0, 0, 0, 0, 0, 0)
 579 #define PIXMAN_solid            PIXMAN_FORMAT (0, 1, 0, 0, 0, 0)
 580 #define PIXMAN_pixbuf           PIXMAN_FORMAT (0, 2, 0, 0, 0, 0)
 581 #define PIXMAN_rpixbuf          PIXMAN_FORMAT (0, 3, 0, 0, 0, 0)
 582 #define PIXMAN_unknown          PIXMAN_FORMAT (0, 4, 0, 0, 0, 0)
 583 #define PIXMAN_any              PIXMAN_FORMAT (0, 5, 0, 0, 0, 0)
 584
 585 #define PIXMAN_OP_any           (PIXMAN_N_OPERATORS + 1)
 586
 587 #define FAST_PATH_ID_TRANSFORM                  (1 <<  0)
 588 #define FAST_PATH_NO_ALPHA_MAP                  (1 <<  1)
 589 #define FAST_PATH_NO_CONVOLUTION_FILTER         (1 <<  2)
 590 #define FAST_PATH_NO_PAD_REPEAT                 (1 <<  3)
 591 #define FAST_PATH_NO_REFLECT_REPEAT             (1 <<  4)
 592 #define FAST_PATH_NO_ACCESSORS                  (1 <<  5)
 593 #define FAST_PATH_NARROW_FORMAT                 (1 <<  6)
 594 #define FAST_PATH_COMPONENT_ALPHA               (1 <<  8)
 595 #define FAST_PATH_SAMPLES_OPAQUE                (1 <<  7)
 596 #define FAST_PATH_UNIFIED_ALPHA                 (1 <<  9)
 597 #define FAST_PATH_SCALE_TRANSFORM               (1 << 10)
 598 #define FAST_PATH_NEAREST_FILTER                (1 << 11)
 599 #define FAST_PATH_HAS_TRANSFORM                 (1 << 12)
 600 #define FAST_PATH_IS_OPAQUE                     (1 << 13)
 601 #define FAST_PATH_NO_NORMAL_REPEAT              (1 << 14)
 602 #define FAST_PATH_NO_NONE_REPEAT                (1 << 15)
 603 #define FAST_PATH_SAMPLES_COVER_CLIP            (1 << 16)
 604 #define FAST_PATH_X_UNIT_POSITIVE               (1 << 17)
 605 #define FAST_PATH_AFFINE_TRANSFORM              (1 << 18)
 606 #define FAST_PATH_Y_UNIT_ZERO                   (1 << 19)
 607 #define FAST_PATH_BILINEAR_FILTER               (1 << 20)
 608
 609 #define FAST_PATH_PAD_REPEAT                                            \
 610     (FAST_PATH_NO_NONE_REPEAT           |                               \
 611      FAST_PATH_NO_NORMAL_REPEAT         |                               \
 612      FAST_PATH_NO_REFLECT_REPEAT)
 613
 614 #define FAST_PATH_NORMAL_REPEAT                                         \
 615     (FAST_PATH_NO_NONE_REPEAT           |                               \
 616      FAST_PATH_NO_PAD_REPEAT            |                               \
 617      FAST_PATH_NO_REFLECT_REPEAT)
 618
 619 #define FAST_PATH_NONE_REPEAT                                           \
 620     (FAST_PATH_NO_NORMAL_REPEAT         |                               \
 621      FAST_PATH_NO_PAD_REPEAT            |                               \
 622      FAST_PATH_NO_REFLECT_REPEAT)
 623
 624 #define FAST_PATH_REFLECT_REPEAT                                        \
 625     (FAST_PATH_NO_NONE_REPEAT           |                               \
 626      FAST_PATH_NO_NORMAL_REPEAT         |                               \
 627      FAST_PATH_NO_PAD_REPEAT)
 628
 629 #define FAST_PATH_STANDARD_FLAGS                                        \
 630     (FAST_PATH_NO_CONVOLUTION_FILTER    |                               \
 631      FAST_PATH_NO_ACCESSORS             |                               \
 632      FAST_PATH_NO_ALPHA_MAP             |                               \
 633      FAST_PATH_NARROW_FORMAT)
 634
 635 #define FAST_PATH_STD_DEST_FLAGS                                        \
 636     (FAST_PATH_NO_ACCESSORS             |                               \
 637      FAST_PATH_NO_ALPHA_MAP             |                               \
 638      FAST_PATH_NARROW_FORMAT)
 639
 640 #define SOURCE_FLAGS(format)                                            \
 641     (FAST_PATH_STANDARD_FLAGS |                                         \
 642      ((PIXMAN_ ## format == PIXMAN_solid) ?                             \
 643       0 : (FAST_PATH_SAMPLES_COVER_CLIP | FAST_PATH_ID_TRANSFORM)))
 644
 645 #define MASK_FLAGS(format, extra)                                       \
 646     ((PIXMAN_ ## format == PIXMAN_null) ? 0 : (SOURCE_FLAGS (format) | extra))
 647
 648 #define FAST_PATH(op, src, src_flags, mask, mask_flags, dest, dest_flags, func) \
 649     PIXMAN_OP_ ## op,                                                   \
 650     PIXMAN_ ## src,                                                     \
 651     src_flags,                                                          \
 652     PIXMAN_ ## mask,                                                    \
 653     mask_flags,                                                         \
 654     PIXMAN_ ## dest,                                                    \
 655     dest_flags,                                                         \
 656     func
 657
 658 #define PIXMAN_STD_FAST_PATH(op, src, mask, dest, func)                 \
 659     { FAST_PATH (                                                       \
 660             op,                                                         \
 661             src,  SOURCE_FLAGS (src),                                   \
 662             mask, MASK_FLAGS (mask, FAST_PATH_UNIFIED_ALPHA),           \
 663             dest, FAST_PATH_STD_DEST_FLAGS,                             \
 664             func) }
 665
 666 #define PIXMAN_STD_FAST_PATH_CA(op, src, mask, dest, func)              \
 667     { FAST_PATH (                                                       \
 668             op,                                                         \
 669             src,  SOURCE_FLAGS (src),                                   \
 670             mask, MASK_FLAGS (mask, FAST_PATH_COMPONENT_ALPHA),         \
 671             dest, FAST_PATH_STD_DEST_FLAGS,                             \
 672             func) }
 673
 674 /* Memory allocation helpers */
 675 void *
 676 pixman_malloc_ab (unsigned int n, unsigned int b);
 677
 678 void *
 679 pixman_malloc_abc (unsigned int a, unsigned int b, unsigned int c);
 680
 681 pixman_bool_t
 682 pixman_multiply_overflows_int (unsigned int a, unsigned int b);
 683
 684 pixman_bool_t
 685 pixman_addition_overflows_int (unsigned int a, unsigned int b);
 686
 687 /* Compositing utilities */
 688 void
 689 pixman_expand (uint64_t *           dst,
 690                const uint32_t *     src,
 691                pixman_format_code_t format,
 692                int                  width);
 693
 694 void
 695 pixman_contract (uint32_t *      dst,
 696                  const uint64_t *src,
 697                  int             width);
 698
 699
 700 /* Region Helpers */
 701 pixman_bool_t
 702 pixman_region32_copy_from_region16 (pixman_region32_t *dst,
 703                                     pixman_region16_t *src);
 704
 705 pixman_bool_t
 706 pixman_region16_copy_from_region32 (pixman_region16_t *dst,
 707                                     pixman_region32_t *src);
 708
 709
 710 /* Misc macros */
 711
 712 #ifndef FALSE
 713 #   define FALSE 0
 714 #endif
 715
 716 #ifndef TRUE
 717 #   define TRUE 1
 718 #endif
 719
 720 #ifndef MIN
 721 #  define MIN(a, b) ((a < b) ? a : b)
 722 #endif
 723
 724 #ifndef MAX
 725 #  define MAX(a, b) ((a > b) ? a : b)
 726 #endif
 727
 728 /* Integer division that rounds towards -infinity */
 729 #define DIV(a, b)                                          \
 730     ((((a) < 0) == ((b) < 0)) ? (a) / (b) :                \
 731      ((a) - (b) + 1 - (((b) < 0) << 1)) / (b))
 732
 733 /* Modulus that produces the remainder wrt. DIV */
 734 #define MOD(a, b) ((a) < 0 ? ((b) - ((-(a) - 1) % (b))) - 1 : (a) % (b))
 735
 736 #define CLIP(v, low, high) ((v) < (low) ? (low) : ((v) > (high) ? (high) : (v)))
 737
 738 /* Conversion between 8888 and 0565 */
 739
 740 #define CONVERT_8888_TO_0565(s)                                         \
 741     ((((s) >> 3) & 0x001f) |                                            \
 742      (((s) >> 5) & 0x07e0) |                                            \
 743      (((s) >> 8) & 0xf800))
 744
 745 #define CONVERT_0565_TO_0888(s)                                         \
 746     (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) |                       \
 747      ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) |                   \
 748      ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)))
 749
 750 #define CONVERT_0565_TO_8888(s) (CONVERT_0565_TO_0888(s) | 0xff000000)
 751
 752 /* Trivial versions that are useful in macros */
 753 #define CONVERT_8888_TO_8888(s) (s)
 754 #define CONVERT_0565_TO_0565(s) (s)
 755
 756 #define PIXMAN_FORMAT_IS_WIDE(f)                                        \
 757     (PIXMAN_FORMAT_A (f) > 8 ||                                         \
 758      PIXMAN_FORMAT_R (f) > 8 ||                                         \
 759      PIXMAN_FORMAT_G (f) > 8 ||                                         \
 760      PIXMAN_FORMAT_B (f) > 8)
 761
 762 #ifdef WORDS_BIGENDIAN
 763 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) << (n))
 764 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) >> (n))
 765 #else
 766 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) >> (n))
 767 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) << (n))
 768 #endif
 769
 770 /*
 771  * Various debugging code
 772  */
 773
 774 #undef DEBUG
 775
 776 #define COMPILE_TIME_ASSERT(x)                                          \
 777     do { typedef int compile_time_assertion [(x)?1:-1]; } while (0)
 778
 779 /* Turn on debugging depending on what type of release this is
 780  */
 781 #if (((PIXMAN_VERSION_MICRO % 2) == 0) && ((PIXMAN_VERSION_MINOR % 2) == 1))
 782
 783 /* Debugging gets turned on for development releases because these
 784  * are the things that end up in bleeding edge distributions such
 785  * as Rawhide etc.
 786  *
 787  * For performance reasons we don't turn it on for stable releases or
 788  * random git checkouts. (Random git checkouts are often used for
 789  * performance work).
 790  */
 791
 792 #    define DEBUG
 793
 794 #endif
 795
 796 #ifdef DEBUG
 797
 798 void
 799 _pixman_log_error (const char *function, const char *message);
 800
 801 #define return_if_fail(expr)                                            \
 802     do                                                                  \
 803     {                                                                   \
 804         if (!(expr))                                                    \
 805         {                                                               \
 806             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 807             return;                                                     \
 808         }                                                               \
 809     }                                                                   \
 810     while (0)
 811
 812 #define return_val_if_fail(expr, retval)                                \
 813     do                                                                  \
 814     {                                                                   \
 815         if (!(expr))                                                    \
 816         {                                                               \
 817             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 818             return (retval);                                            \
 819         }                                                               \
 820     }                                                                   \
 821     while (0)
 822
 823 #define critical_if_fail(expr)                                          \
 824     do                                                                  \
 825     {                                                                   \
 826         if (!(expr))                                                    \
 827             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 828     }                                                                   \
 829     while (0)
 830
 831
 832 #else
 833
 834 #define _pixman_log_error(f,m) do { } while (0)                         \
 835
 836 #define return_if_fail(expr)                                            \
 837     do                                                                  \
 838     {                                                                   \
 839         if (!(expr))                                                    \
 840             return;                                                     \
 841     }                                                                   \
 842     while (0)
 843
 844 #define return_val_if_fail(expr, retval)                                \
 845     do                                                                  \
 846     {                                                                   \
 847         if (!(expr))                                                    \
 848             return (retval);                                            \
 849     }                                                                   \
 850     while (0)
 851
 852 #define critical_if_fail(expr)                                          \
 853     do                                                                  \
 854     {                                                                   \
 855     }                                                                   \
 856     while (0)
 857 #endif
 858
 859 /*
 860  * Timers
 861  */
 862
 863 #ifdef PIXMAN_TIMERS
 864
 865 static inline uint64_t
 866 oil_profile_stamp_rdtsc (void)
 867 {
 868     uint64_t ts;
 869
 870     __asm__ __volatile__ ("rdtsc\n" : "=A" (ts));
 871     return ts;
 872 }
 873
 874 #define OIL_STAMP oil_profile_stamp_rdtsc
 875
 876 typedef struct pixman_timer_t pixman_timer_t;
 877
 878 struct pixman_timer_t
 879 {
 880     int             initialized;
 881     const char *    name;
 882     uint64_t        n_times;
 883     uint64_t        total;
 884     pixman_timer_t *next;
 885 };
 886
 887 extern int timer_defined;
 888
 889 void pixman_timer_register (pixman_timer_t *timer);
 890
 891 #define TIMER_BEGIN(tname)                                              \
 892     {                                                                   \
 893         static pixman_timer_t timer ## tname;                           \
 894         uint64_t              begin ## tname;                           \
 895                                                                         \
 896         if (!timer ## tname.initialized)                                \
 897         {                                                               \
 898             timer ## tname.initialized = 1;                             \
 899             timer ## tname.name = # tname;                              \
 900             pixman_timer_register (&timer ## tname);                    \
 901         }                                                               \
 902                                                                         \
 903         timer ## tname.n_times++;                                       \
 904         begin ## tname = OIL_STAMP ();
 905
 906 #define TIMER_END(tname)                                                \
 907     timer ## tname.total += OIL_STAMP () - begin ## tname;              \
 908     }
 909
 910 #endif /* PIXMAN_TIMERS */
 911
 912 #endif /* PIXMAN_PRIVATE_H */