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 source_image source_image_t;
  24 typedef struct solid_fill solid_fill_t;
  25 typedef struct gradient gradient_t;
  26 typedef struct linear_gradient linear_gradient_t;
  27 typedef struct horizontal_gradient horizontal_gradient_t;
  28 typedef struct vertical_gradient vertical_gradient_t;
  29 typedef struct conical_gradient conical_gradient_t;
  30 typedef struct radial_gradient radial_gradient_t;
  31 typedef struct bits_image bits_image_t;
  32 typedef struct circle circle_t;
  33
  34 typedef void (*fetch_scanline_t) (pixman_image_t *image,
  35                                   int             x,
  36                                   int             y,
  37                                   int             width,
  38                                   uint32_t       *buffer,
  39                                   const uint32_t *mask);
  40
  41 typedef uint32_t (*fetch_pixel_32_t) (bits_image_t *image,
  42                                       int           x,
  43                                       int           y);
  44
  45 typedef uint64_t (*fetch_pixel_64_t) (bits_image_t *image,
  46                                       int           x,
  47                                       int           y);
  48
  49 typedef void (*store_scanline_t) (bits_image_t *  image,
  50                                   int             x,
  51                                   int             y,
  52                                   int             width,
  53                                   const uint32_t *values);
  54
  55 typedef enum
  56 {
  57     BITS,
  58     LINEAR,
  59     CONICAL,
  60     RADIAL,
  61     SOLID
  62 } image_type_t;
  63
  64 typedef enum
  65 {
  66     SOURCE_IMAGE_CLASS_UNKNOWN,
  67     SOURCE_IMAGE_CLASS_HORIZONTAL,
  68     SOURCE_IMAGE_CLASS_VERTICAL,
  69 } source_image_class_t;
  70
  71 typedef source_image_class_t (*classify_func_t) (pixman_image_t *image,
  72                                                 int             x,
  73                                                 int             y,
  74                                                 int             width,
  75                                                 int             height);
  76 typedef void (*property_changed_func_t) (pixman_image_t *image);
  77
  78 struct image_common
  79 {
  80     image_type_t                type;
  81     int32_t                     ref_count;
  82     pixman_region32_t           clip_region;
  83     pixman_bool_t               have_clip_region;   /* FALSE if there is no clip */
  84     pixman_bool_t               client_clip;        /* Whether the source clip was
  85                                                        set by a client */
  86     pixman_bool_t               clip_sources;       /* Whether the clip applies when
  87                                                      * the image is used as a source
  88                                                      */
  89     pixman_bool_t               dirty;
  90     pixman_transform_t *        transform;
  91     pixman_repeat_t             repeat;
  92     pixman_filter_t             filter;
  93     pixman_fixed_t *            filter_params;
  94     int                         n_filter_params;
  95     bits_image_t *              alpha_map;
  96     int                         alpha_origin_x;
  97     int                         alpha_origin_y;
  98     pixman_bool_t               component_alpha;
  99     classify_func_t             classify;
 100     property_changed_func_t     property_changed;
 101     fetch_scanline_t            get_scanline_32;
 102     fetch_scanline_t            get_scanline_64;
 103
 104     pixman_image_destroy_func_t destroy_func;
 105     void *                      destroy_data;
 106
 107     uint32_t                    flags;
 108     pixman_format_code_t        extended_format_code;
 109 };
 110
 111 struct source_image
 112 {
 113     image_common_t common;
 114     source_image_class_t class;
 115 };
 116
 117 struct solid_fill
 118 {
 119     source_image_t common;
 120     pixman_color_t color;
 121
 122     uint32_t       color_32;
 123     uint64_t       color_64;
 124 };
 125
 126 struct gradient
 127 {
 128     source_image_t          common;
 129     int                     n_stops;
 130     pixman_gradient_stop_t *stops;
 131     int                     stop_range;
 132 };
 133
 134 struct linear_gradient
 135 {
 136     gradient_t           common;
 137     pixman_point_fixed_t p1;
 138     pixman_point_fixed_t p2;
 139 };
 140
 141 struct circle
 142 {
 143     pixman_fixed_t x;
 144     pixman_fixed_t y;
 145     pixman_fixed_t radius;
 146 };
 147
 148 struct radial_gradient
 149 {
 150     gradient_t common;
 151
 152     circle_t   c1;
 153     circle_t   c2;
 154     double     cdx;
 155     double     cdy;
 156     double     dr;
 157     double     A;
 158 };
 159
 160 struct conical_gradient
 161 {
 162     gradient_t           common;
 163     pixman_point_fixed_t center;
 164     double               angle;
 165 };
 166
 167 struct bits_image
 168 {
 169     image_common_t             common;
 170     pixman_format_code_t       format;
 171     const pixman_indexed_t *   indexed;
 172     int                        width;
 173     int                        height;
 174     uint32_t *                 bits;
 175     uint32_t *                 free_me;
 176     int                        rowstride;  /* in number of uint32_t's */
 177
 178     fetch_scanline_t           fetch_scanline_32;
 179     fetch_pixel_32_t           fetch_pixel_32;
 180     store_scanline_t           store_scanline_32;
 181
 182     fetch_scanline_t           fetch_scanline_64;
 183     fetch_pixel_64_t           fetch_pixel_64;
 184     store_scanline_t           store_scanline_64;
 185
 186     /* Used for indirect access to the bits */
 187     pixman_read_memory_func_t  read_func;
 188     pixman_write_memory_func_t write_func;
 189 };
 190
 191 union pixman_image
 192 {
 193     image_type_t       type;
 194     image_common_t     common;
 195     bits_image_t       bits;
 196     source_image_t     source;
 197     gradient_t         gradient;
 198     linear_gradient_t  linear;
 199     conical_gradient_t conical;
 200     radial_gradient_t  radial;
 201     solid_fill_t       solid;
 202 };
 203
 204 void
 205 _pixman_bits_image_setup_accessors (bits_image_t *image);
 206
 207 void
 208 _pixman_image_get_scanline_generic_64  (pixman_image_t *image,
 209                                         int             x,
 210                                         int             y,
 211                                         int             width,
 212                                         uint32_t *      buffer,
 213                                         const uint32_t *mask);
 214
 215 source_image_class_t
 216 _pixman_image_classify (pixman_image_t *image,
 217                         int             x,
 218                         int             y,
 219                         int             width,
 220                         int             height);
 221
 222 void
 223 _pixman_image_get_scanline_32 (pixman_image_t *image,
 224                                int             x,
 225                                int             y,
 226                                int             width,
 227                                uint32_t *      buffer,
 228                                const uint32_t *mask);
 229
 230 /* Even thought the type of buffer is uint32_t *, the function actually expects
 231  * a uint64_t *buffer.
 232  */
 233 void
 234 _pixman_image_get_scanline_64 (pixman_image_t *image,
 235                                int             x,
 236                                int             y,
 237                                int             width,
 238                                uint32_t *      buffer,
 239                                const uint32_t *unused);
 240
 241 void
 242 _pixman_image_store_scanline_32 (bits_image_t *  image,
 243                                  int             x,
 244                                  int             y,
 245                                  int             width,
 246                                  const uint32_t *buffer);
 247
 248 /* Even though the type of buffer is uint32_t *, the function
 249  * actually expects a uint64_t *buffer.
 250  */
 251 void
 252 _pixman_image_store_scanline_64 (bits_image_t *  image,
 253                                  int             x,
 254                                  int             y,
 255                                  int             width,
 256                                  const uint32_t *buffer);
 257
 258 pixman_image_t *
 259 _pixman_image_allocate (void);
 260
 261 pixman_bool_t
 262 _pixman_init_gradient (gradient_t *                  gradient,
 263                        const pixman_gradient_stop_t *stops,
 264                        int                           n_stops);
 265 void
 266 _pixman_image_reset_clip_region (pixman_image_t *image);
 267
 268 void
 269 _pixman_image_validate (pixman_image_t *image);
 270
 271 uint32_t
 272 _pixman_image_get_solid (pixman_image_t *     image,
 273                          pixman_format_code_t format);
 274
 275 #define PIXMAN_IMAGE_GET_LINE(image, x, y, type, out_stride, line, mul) \
 276     do                                                                  \
 277     {                                                                   \
 278         uint32_t *__bits__;                                             \
 279         int       __stride__;                                           \
 280                                                                         \
 281         __bits__ = image->bits.bits;                                    \
 282         __stride__ = image->bits.rowstride;                             \
 283         (out_stride) =                                                  \
 284             __stride__ * (int) sizeof (uint32_t) / (int) sizeof (type); \
 285         (line) =                                                        \
 286             ((type *) __bits__) + (out_stride) * (y) + (mul) * (x);     \
 287     } while (0)
 288
 289 /*
 290  * Gradient walker
 291  */
 292 typedef struct
 293 {
 294     uint32_t                left_ag;
 295     uint32_t                left_rb;
 296     uint32_t                right_ag;
 297     uint32_t                right_rb;
 298     int32_t                 left_x;
 299     int32_t                 right_x;
 300     int32_t                 stepper;
 301
 302     pixman_gradient_stop_t *stops;
 303     int                     num_stops;
 304     unsigned int            spread;
 305
 306     int                     need_reset;
 307 } pixman_gradient_walker_t;
 308
 309 void
 310 _pixman_gradient_walker_init (pixman_gradient_walker_t *walker,
 311                               gradient_t *              gradient,
 312                               unsigned int              spread);
 313
 314 void
 315 _pixman_gradient_walker_reset (pixman_gradient_walker_t *walker,
 316                                pixman_fixed_32_32_t      pos);
 317
 318 uint32_t
 319 _pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker,
 320                                pixman_fixed_32_32_t      x);
 321
 322 /*
 323  * Edges
 324  */
 325
 326 #define MAX_ALPHA(n)    ((1 << (n)) - 1)
 327 #define N_Y_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) - 1)
 328 #define N_X_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) + 1)
 329
 330 #define STEP_Y_SMALL(n) (pixman_fixed_1 / N_Y_FRAC (n))
 331 #define STEP_Y_BIG(n)   (pixman_fixed_1 - (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 332
 333 #define Y_FRAC_FIRST(n) (STEP_Y_BIG (n) / 2)
 334 #define Y_FRAC_LAST(n)  (Y_FRAC_FIRST (n) + (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 335
 336 #define STEP_X_SMALL(n) (pixman_fixed_1 / N_X_FRAC (n))
 337 #define STEP_X_BIG(n)   (pixman_fixed_1 - (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 338
 339 #define X_FRAC_FIRST(n) (STEP_X_BIG (n) / 2)
 340 #define X_FRAC_LAST(n)  (X_FRAC_FIRST (n) + (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 341
 342 #define RENDER_SAMPLES_X(x, n)                                          \
 343     ((n) == 1? 0 : (pixman_fixed_frac (x) +                             \
 344                     X_FRAC_FIRST (n)) / STEP_X_SMALL (n))
 345
 346 void
 347 pixman_rasterize_edges_accessors (pixman_image_t *image,
 348                                   pixman_edge_t * l,
 349                                   pixman_edge_t * r,
 350                                   pixman_fixed_t  t,
 351                                   pixman_fixed_t  b);
 352
 353 /*
 354  * Implementations
 355  */
 356 typedef struct pixman_implementation_t pixman_implementation_t;
 357
 358 typedef void (*pixman_combine_32_func_t) (pixman_implementation_t *imp,
 359                                           pixman_op_t              op,
 360                                           uint32_t *               dest,
 361                                           const uint32_t *         src,
 362                                           const uint32_t *         mask,
 363                                           int                      width);
 364
 365 typedef void (*pixman_combine_64_func_t) (pixman_implementation_t *imp,
 366                                           pixman_op_t              op,
 367                                           uint64_t *               dest,
 368                                           const uint64_t *         src,
 369                                           const uint64_t *         mask,
 370                                           int                      width);
 371
 372 typedef void (*pixman_composite_func_t) (pixman_implementation_t *imp,
 373                                          pixman_op_t              op,
 374                                          pixman_image_t *         src,
 375                                          pixman_image_t *         mask,
 376                                          pixman_image_t *         dest,
 377                                          int32_t                  src_x,
 378                                          int32_t                  src_y,
 379                                          int32_t                  mask_x,
 380                                          int32_t                  mask_y,
 381                                          int32_t                  dest_x,
 382                                          int32_t                  dest_y,
 383                                          int32_t                  width,
 384                                          int32_t                  height);
 385 typedef pixman_bool_t (*pixman_blt_func_t) (pixman_implementation_t *imp,
 386                                             uint32_t *               src_bits,
 387                                             uint32_t *               dst_bits,
 388                                             int                      src_stride,
 389                                             int                      dst_stride,
 390                                             int                      src_bpp,
 391                                             int                      dst_bpp,
 392                                             int                      src_x,
 393                                             int                      src_y,
 394                                             int                      dst_x,
 395                                             int                      dst_y,
 396                                             int                      width,
 397                                             int                      height);
 398 typedef pixman_bool_t (*pixman_fill_func_t) (pixman_implementation_t *imp,
 399                                              uint32_t *               bits,
 400                                              int                      stride,
 401                                              int                      bpp,
 402                                              int                      x,
 403                                              int                      y,
 404                                              int                      width,
 405                                              int                      height,
 406                                              uint32_t                 xor);
 407
 408 void _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp);
 409 void _pixman_setup_combiner_functions_64 (pixman_implementation_t *imp);
 410
 411 typedef struct
 412 {
 413     pixman_op_t             op;
 414     pixman_format_code_t    src_format;
 415     uint32_t                src_flags;
 416     pixman_format_code_t    mask_format;
 417     uint32_t                mask_flags;
 418     pixman_format_code_t    dest_format;
 419     uint32_t                dest_flags;
 420     pixman_composite_func_t func;
 421 } pixman_fast_path_t;
 422
 423 struct pixman_implementation_t
 424 {
 425     pixman_implementation_t *   toplevel;
 426     pixman_implementation_t *   delegate;
 427     const pixman_fast_path_t *  fast_paths;
 428
 429     pixman_blt_func_t           blt;
 430     pixman_fill_func_t          fill;
 431
 432     pixman_combine_32_func_t    combine_32[PIXMAN_N_OPERATORS];
 433     pixman_combine_32_func_t    combine_32_ca[PIXMAN_N_OPERATORS];
 434     pixman_combine_64_func_t    combine_64[PIXMAN_N_OPERATORS];
 435     pixman_combine_64_func_t    combine_64_ca[PIXMAN_N_OPERATORS];
 436 };
 437
 438 pixman_implementation_t *
 439 _pixman_implementation_create (pixman_implementation_t *delegate,
 440                                const pixman_fast_path_t *fast_paths);
 441
 442 void
 443 _pixman_implementation_combine_32 (pixman_implementation_t *imp,
 444                                    pixman_op_t              op,
 445                                    uint32_t *               dest,
 446                                    const uint32_t *         src,
 447                                    const uint32_t *         mask,
 448                                    int                      width);
 449 void
 450 _pixman_implementation_combine_64 (pixman_implementation_t *imp,
 451                                    pixman_op_t              op,
 452                                    uint64_t *               dest,
 453                                    const uint64_t *         src,
 454                                    const uint64_t *         mask,
 455                                    int                      width);
 456 void
 457 _pixman_implementation_combine_32_ca (pixman_implementation_t *imp,
 458                                       pixman_op_t              op,
 459                                       uint32_t *               dest,
 460                                       const uint32_t *         src,
 461                                       const uint32_t *         mask,
 462                                       int                      width);
 463 void
 464 _pixman_implementation_combine_64_ca (pixman_implementation_t *imp,
 465                                       pixman_op_t              op,
 466                                       uint64_t *               dest,
 467                                       const uint64_t *         src,
 468                                       const uint64_t *         mask,
 469                                       int                      width);
 470
 471 pixman_bool_t
 472 _pixman_implementation_blt (pixman_implementation_t *imp,
 473                             uint32_t *               src_bits,
 474                             uint32_t *               dst_bits,
 475                             int                      src_stride,
 476                             int                      dst_stride,
 477                             int                      src_bpp,
 478                             int                      dst_bpp,
 479                             int                      src_x,
 480                             int                      src_y,
 481                             int                      dst_x,
 482                             int                      dst_y,
 483                             int                      width,
 484                             int                      height);
 485
 486 pixman_bool_t
 487 _pixman_implementation_fill (pixman_implementation_t *imp,
 488                              uint32_t *               bits,
 489                              int                      stride,
 490                              int                      bpp,
 491                              int                      x,
 492                              int                      y,
 493                              int                      width,
 494                              int                      height,
 495                              uint32_t                 xor);
 496
 497 /* Specific implementations */
 498 pixman_implementation_t *
 499 _pixman_implementation_create_general (void);
 500
 501 pixman_implementation_t *
 502 _pixman_implementation_create_fast_path (void);
 503
 504 #ifdef USE_MMX
 505 pixman_implementation_t *
 506 _pixman_implementation_create_mmx (void);
 507 #endif
 508
 509 #ifdef USE_SSE2
 510 pixman_implementation_t *
 511 _pixman_implementation_create_sse2 (void);
 512 #endif
 513
 514 #ifdef USE_ARM_SIMD
 515 pixman_implementation_t *
 516 _pixman_implementation_create_arm_simd (void);
 517 #endif
 518
 519 #ifdef USE_ARM_NEON
 520 pixman_implementation_t *
 521 _pixman_implementation_create_arm_neon (void);
 522 #endif
 523
 524 #ifdef USE_VMX
 525 pixman_implementation_t *
 526 _pixman_implementation_create_vmx (void);
 527 #endif
 528
 529 pixman_implementation_t *
 530 _pixman_choose_implementation (void);
 531
 532
 533
 534 /*
 535  * Utilities
 536  */
 537
 538 /* These "formats" all have depth 0, so they
 539  * will never clash with any real ones
 540  */
 541 #define PIXMAN_null             PIXMAN_FORMAT (0, 0, 0, 0, 0, 0)
 542 #define PIXMAN_solid            PIXMAN_FORMAT (0, 1, 0, 0, 0, 0)
 543 #define PIXMAN_pixbuf           PIXMAN_FORMAT (0, 2, 0, 0, 0, 0)
 544 #define PIXMAN_rpixbuf          PIXMAN_FORMAT (0, 3, 0, 0, 0, 0)
 545 #define PIXMAN_unknown          PIXMAN_FORMAT (0, 4, 0, 0, 0, 0)
 546 #define PIXMAN_any              PIXMAN_FORMAT (0, 5, 0, 0, 0, 0)
 547
 548 #define PIXMAN_OP_any           (PIXMAN_N_OPERATORS + 1)
 549
 550 #define FAST_PATH_ID_TRANSFORM                  (1 <<  0)
 551 #define FAST_PATH_NO_ALPHA_MAP                  (1 <<  1)
 552 #define FAST_PATH_NO_CONVOLUTION_FILTER         (1 <<  2)
 553 #define FAST_PATH_NO_PAD_REPEAT                 (1 <<  3)
 554 #define FAST_PATH_NO_REFLECT_REPEAT             (1 <<  4)
 555 #define FAST_PATH_NO_ACCESSORS                  (1 <<  5)
 556 #define FAST_PATH_NO_WIDE_FORMAT                (1 <<  6)
 557 #define FAST_PATH_COVERS_CLIP                   (1 <<  7)
 558 #define FAST_PATH_COMPONENT_ALPHA               (1 <<  8)
 559 #define FAST_PATH_UNIFIED_ALPHA                 (1 <<  9)
 560 #define FAST_PATH_SCALE_TRANSFORM               (1 << 10)
 561 #define FAST_PATH_NEAREST_FILTER                (1 << 11)
 562 #define FAST_PATH_SIMPLE_REPEAT                 (1 << 12)
 563 #define FAST_PATH_IS_OPAQUE                     (1 << 13)
 564 #define FAST_PATH_NEEDS_WORKAROUND              (1 << 14)
 565 #define FAST_PATH_NO_NONE_REPEAT                (1 << 15)
 566 #define FAST_PATH_SAMPLES_COVER_CLIP            (1 << 16)
 567 #define FAST_PATH_X_UNIT_POSITIVE               (1 << 17)
 568
 569 #define _FAST_PATH_STANDARD_FLAGS                                       \
 570     (FAST_PATH_ID_TRANSFORM             |                               \
 571      FAST_PATH_NO_ALPHA_MAP             |                               \
 572      FAST_PATH_NO_CONVOLUTION_FILTER    |                               \
 573      FAST_PATH_NO_PAD_REPEAT            |                               \
 574      FAST_PATH_NO_REFLECT_REPEAT        |                               \
 575      FAST_PATH_NO_ACCESSORS             |                               \
 576      FAST_PATH_NO_WIDE_FORMAT           |                               \
 577      FAST_PATH_COVERS_CLIP)
 578
 579 #define FAST_PATH_STD_SRC_FLAGS                                         \
 580     _FAST_PATH_STANDARD_FLAGS
 581 #define FAST_PATH_STD_MASK_U_FLAGS                                      \
 582     (_FAST_PATH_STANDARD_FLAGS          |                               \
 583      FAST_PATH_UNIFIED_ALPHA)
 584 #define FAST_PATH_STD_MASK_CA_FLAGS                                     \
 585     (_FAST_PATH_STANDARD_FLAGS          |                               \
 586      FAST_PATH_COMPONENT_ALPHA)
 587 #define FAST_PATH_STD_DEST_FLAGS                                        \
 588     (FAST_PATH_NO_ACCESSORS             |                               \
 589      FAST_PATH_NO_WIDE_FORMAT)
 590
 591 #define FAST_PATH(op, src, src_flags, mask, mask_flags, dest, dest_flags, func) \
 592     PIXMAN_OP_ ## op,                                                   \
 593     PIXMAN_ ## src,                                                     \
 594     src_flags,                                                          \
 595     PIXMAN_ ## mask,                                                    \
 596     mask_flags,                                                         \
 597     PIXMAN_ ## dest,                                                    \
 598     dest_flags,                                                         \
 599     func
 600
 601 #define PIXMAN_STD_FAST_PATH(op, src, mask, dest, func)                 \
 602     { FAST_PATH (                                                       \
 603           op,                                                           \
 604           src, FAST_PATH_STD_SRC_FLAGS,                                 \
 605           mask, (PIXMAN_ ## mask) ? FAST_PATH_STD_MASK_U_FLAGS : 0,     \
 606           dest, FAST_PATH_STD_DEST_FLAGS,                               \
 607           func) }
 608
 609 #define PIXMAN_STD_FAST_PATH_CA(op, src, mask, dest, func)              \
 610     { FAST_PATH (                                                       \
 611           op,                                                           \
 612           src, FAST_PATH_STD_SRC_FLAGS,                                 \
 613           mask, FAST_PATH_STD_MASK_CA_FLAGS,                            \
 614           dest, FAST_PATH_STD_DEST_FLAGS,                               \
 615           func) }
 616
 617 /* Memory allocation helpers */
 618 void *
 619 pixman_malloc_ab (unsigned int n, unsigned int b);
 620
 621 void *
 622 pixman_malloc_abc (unsigned int a, unsigned int b, unsigned int c);
 623
 624 pixman_bool_t
 625 pixman_multiply_overflows_int (unsigned int a, unsigned int b);
 626
 627 pixman_bool_t
 628 pixman_addition_overflows_int (unsigned int a, unsigned int b);
 629
 630 /* Compositing utilities */
 631 void
 632 pixman_expand (uint64_t *           dst,
 633                const uint32_t *     src,
 634                pixman_format_code_t format,
 635                int                  width);
 636
 637 void
 638 pixman_contract (uint32_t *      dst,
 639                  const uint64_t *src,
 640                  int             width);
 641
 642
 643 /* Region Helpers */
 644 pixman_bool_t
 645 pixman_region32_copy_from_region16 (pixman_region32_t *dst,
 646                                     pixman_region16_t *src);
 647
 648 pixman_bool_t
 649 pixman_region16_copy_from_region32 (pixman_region16_t *dst,
 650                                     pixman_region32_t *src);
 651
 652
 653 /* Misc macros */
 654
 655 #ifndef FALSE
 656 #   define FALSE 0
 657 #endif
 658
 659 #ifndef TRUE
 660 #   define TRUE 1
 661 #endif
 662
 663 #ifndef MIN
 664 #  define MIN(a, b) ((a < b) ? a : b)
 665 #endif
 666
 667 #ifndef MAX
 668 #  define MAX(a, b) ((a > b) ? a : b)
 669 #endif
 670
 671 /* Integer division that rounds towards -infinity */
 672 #define DIV(a, b)                                          \
 673     ((((a) < 0) == ((b) < 0)) ? (a) / (b) :                \
 674      ((a) - (b) + 1 - (((b) < 0) << 1)) / (b))
 675
 676 /* Modulus that produces the remainder wrt. DIV */
 677 #define MOD(a, b) ((a) < 0 ? ((b) - ((-(a) - 1) % (b))) - 1 : (a) % (b))
 678
 679 #define CLIP(v, low, high) ((v) < (low) ? (low) : ((v) > (high) ? (high) : (v)))
 680
 681 /* Conversion between 8888 and 0565 */
 682
 683 #define CONVERT_8888_TO_0565(s)                                         \
 684     ((((s) >> 3) & 0x001f) |                                            \
 685      (((s) >> 5) & 0x07e0) |                                            \
 686      (((s) >> 8) & 0xf800))
 687
 688 #define CONVERT_0565_TO_0888(s)                                         \
 689     (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) |                       \
 690      ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) |                   \
 691      ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)))
 692
 693 #define CONVERT_0565_TO_8888(s) (CONVERT_0565_TO_0888(s) | 0xff000000)
 694
 695 /* Trivial versions that are useful in macros */
 696 #define CONVERT_8888_TO_8888(s) (s)
 697 #define CONVERT_0565_TO_0565(s) (s)
 698
 699 #define PIXMAN_FORMAT_IS_WIDE(f)                                        \
 700     (PIXMAN_FORMAT_A (f) > 8 ||                                         \
 701      PIXMAN_FORMAT_R (f) > 8 ||                                         \
 702      PIXMAN_FORMAT_G (f) > 8 ||                                         \
 703      PIXMAN_FORMAT_B (f) > 8)
 704
 705 #ifdef WORDS_BIGENDIAN
 706 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) << (n))
 707 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) >> (n))
 708 #else
 709 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) >> (n))
 710 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) << (n))
 711 #endif
 712
 713 /*
 714  * Various debugging code
 715  */
 716
 717 #undef DEBUG
 718
 719 /* Turn on debugging depending on what type of release this is
 720  */
 721 #if (((PIXMAN_VERSION_MICRO % 2) == 0) && ((PIXMAN_VERSION_MINOR % 2) == 1))
 722
 723 /* Debugging gets turned on for development releases because these
 724  * are the things that end up in bleeding edge distributions such
 725  * as Rawhide etc.
 726  *
 727  * For performance reasons we don't turn it on for stable releases or
 728  * random git checkouts. (Random git checkouts are often used for
 729  * performance work).
 730  */
 731
 732 #    define DEBUG
 733
 734 #endif
 735
 736 #ifdef DEBUG
 737
 738 void
 739 _pixman_log_error (const char *function, const char *message);
 740
 741 #define return_if_fail(expr)                                            \
 742     do                                                                  \
 743     {                                                                   \
 744         if (!(expr))                                                    \
 745         {                                                               \
 746             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 747             return;                                                     \
 748         }                                                               \
 749     }                                                                   \
 750     while (0)
 751
 752 #define return_val_if_fail(expr, retval)                                \
 753     do                                                                  \
 754     {                                                                   \
 755         if (!(expr))                                                    \
 756         {                                                               \
 757             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 758             return (retval);                                            \
 759         }                                                               \
 760     }                                                                   \
 761     while (0)
 762
 763 #define critical_if_fail(expr)                                          \
 764     do                                                                  \
 765     {                                                                   \
 766         if (!(expr))                                                    \
 767             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 768     }                                                                   \
 769     while (0)
 770
 771
 772 #else
 773
 774 #define _pixman_log_error(f,m) do { } while (0)                         \
 775
 776 #define return_if_fail(expr)                                            \
 777     do                                                                  \
 778     {                                                                   \
 779         if (!(expr))                                                    \
 780             return;                                                     \
 781     }                                                                   \
 782     while (0)
 783
 784 #define return_val_if_fail(expr, retval)                                \
 785     do                                                                  \
 786     {                                                                   \
 787         if (!(expr))                                                    \
 788             return (retval);                                            \
 789     }                                                                   \
 790     while (0)
 791
 792 #define critical_if_fail(expr)                                          \
 793     do                                                                  \
 794     {                                                                   \
 795     }                                                                   \
 796     while (0)
 797 #endif
 798
 799 /*
 800  * Timers
 801  */
 802
 803 #ifdef PIXMAN_TIMERS
 804
 805 static inline uint64_t
 806 oil_profile_stamp_rdtsc (void)
 807 {
 808     uint64_t ts;
 809
 810     __asm__ __volatile__ ("rdtsc\n" : "=A" (ts));
 811     return ts;
 812 }
 813
 814 #define OIL_STAMP oil_profile_stamp_rdtsc
 815
 816 typedef struct pixman_timer_t pixman_timer_t;
 817
 818 struct pixman_timer_t
 819 {
 820     int             initialized;
 821     const char *    name;
 822     uint64_t        n_times;
 823     uint64_t        total;
 824     pixman_timer_t *next;
 825 };
 826
 827 extern int timer_defined;
 828
 829 void pixman_timer_register (pixman_timer_t *timer);
 830
 831 #define TIMER_BEGIN(tname)                                              \
 832     {                                                                   \
 833         static pixman_timer_t timer ## tname;                           \
 834         uint64_t              begin ## tname;                           \
 835                                                                         \
 836         if (!timer ## tname.initialized)                                \
 837         {                                                               \
 838             timer ## tname.initialized = 1;                             \
 839             timer ## tname.name = # tname;                              \
 840             pixman_timer_register (&timer ## tname);                    \
 841         }                                                               \
 842                                                                         \
 843         timer ## tname.n_times++;                                       \
 844         begin ## tname = OIL_STAMP ();
 845
 846 #define TIMER_END(tname)                                                \
 847     timer ## tname.total += OIL_STAMP () - begin ## tname;              \
 848     }
 849
 850 #endif /* PIXMAN_TIMERS */
 851
 852 #endif /* PIXMAN_PRIVATE_H */