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
  15 #include "pixman-compiler.h"
  16
  17 /*
  18  * Images
  19  */
  20 typedef struct image_common image_common_t;
  21 typedef struct source_image source_image_t;
  22 typedef struct solid_fill solid_fill_t;
  23 typedef struct gradient gradient_t;
  24 typedef struct linear_gradient linear_gradient_t;
  25 typedef struct horizontal_gradient horizontal_gradient_t;
  26 typedef struct vertical_gradient vertical_gradient_t;
  27 typedef struct conical_gradient conical_gradient_t;
  28 typedef struct radial_gradient radial_gradient_t;
  29 typedef struct bits_image bits_image_t;
  30 typedef struct circle circle_t;
  31
  32 typedef void (*fetch_scanline_t) (pixman_image_t *image,
  33                                   int             x,
  34                                   int             y,
  35                                   int             width,
  36                                   uint32_t       *buffer,
  37                                   const uint32_t *mask,
  38                                   uint32_t        mask_bits);
  39
  40 typedef uint32_t (*fetch_pixel_32_t) (bits_image_t *image,
  41                                       int           x,
  42                                       int           y);
  43
  44 typedef uint64_t (*fetch_pixel_64_t) (bits_image_t *image,
  45                                       int           x,
  46                                       int           y);
  47
  48 typedef void (*store_scanline_t) (bits_image_t *  image,
  49                                   int             x,
  50                                   int             y,
  51                                   int             width,
  52                                   const uint32_t *values);
  53
  54 typedef enum
  55 {
  56     BITS,
  57     LINEAR,
  58     CONICAL,
  59     RADIAL,
  60     SOLID
  61 } image_type_t;
  62
  63 typedef enum
  64 {
  65     SOURCE_IMAGE_CLASS_UNKNOWN,
  66     SOURCE_IMAGE_CLASS_HORIZONTAL,
  67     SOURCE_IMAGE_CLASS_VERTICAL,
  68 } source_image_class_t;
  69
  70 typedef source_image_class_t (*classify_func_t) (pixman_image_t *image,
  71                                                 int             x,
  72                                                 int             y,
  73                                                 int             width,
  74                                                 int             height);
  75 typedef void (*property_changed_func_t) (pixman_image_t *image);
  76
  77 struct image_common
  78 {
  79     image_type_t                type;
  80     int32_t                     ref_count;
  81     pixman_region32_t           clip_region;
  82     pixman_bool_t               have_clip_region;   /* FALSE if there is no clip */
  83     pixman_bool_t               client_clip;        /* Whether the source clip was
  84                                                        set by a client */
  85     pixman_bool_t               clip_sources;       /* Whether the clip applies when
  86                                                      * the image is used as a source
  87                                                      */
  88     pixman_bool_t               dirty;
  89     pixman_bool_t               need_workaround;
  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     pixman_fixed_t       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 a pixel, disregarding alpha maps, transformations etc. */
 179     fetch_pixel_32_t           fetch_pixel_raw_32;
 180     fetch_pixel_64_t           fetch_pixel_raw_64;
 181
 182     /* Fetch a pixel, taking alpha maps into account */
 183     fetch_pixel_32_t           fetch_pixel_32;
 184     fetch_pixel_64_t           fetch_pixel_64;
 185
 186     /* Fetch raw scanlines, with no regard for transformations, alpha maps etc. */
 187     fetch_scanline_t           fetch_scanline_raw_32;
 188     fetch_scanline_t           fetch_scanline_raw_64;
 189
 190     /* Store scanlines with no regard for alpha maps */
 191     store_scanline_t           store_scanline_raw_32;
 192     store_scanline_t           store_scanline_raw_64;
 193
 194     /* Store a scanline, taking alpha maps into account */
 195     store_scanline_t           store_scanline_32;
 196     store_scanline_t           store_scanline_64;
 197
 198     /* Used for indirect access to the bits */
 199     pixman_read_memory_func_t  read_func;
 200     pixman_write_memory_func_t write_func;
 201 };
 202
 203 union pixman_image
 204 {
 205     image_type_t       type;
 206     image_common_t     common;
 207     bits_image_t       bits;
 208     source_image_t     source;
 209     gradient_t         gradient;
 210     linear_gradient_t  linear;
 211     conical_gradient_t conical;
 212     radial_gradient_t  radial;
 213     solid_fill_t       solid;
 214 };
 215
 216
 217 void
 218 _pixman_bits_image_setup_raw_accessors (bits_image_t *image);
 219
 220 void
 221 _pixman_image_get_scanline_generic_64  (pixman_image_t *image,
 222                                         int             x,
 223                                         int             y,
 224                                         int             width,
 225                                         uint32_t *      buffer,
 226                                         const uint32_t *mask,
 227                                         uint32_t        mask_bits);
 228
 229 source_image_class_t
 230 _pixman_image_classify (pixman_image_t *image,
 231                         int             x,
 232                         int             y,
 233                         int             width,
 234                         int             height);
 235
 236 void
 237 _pixman_image_get_scanline_32 (pixman_image_t *image,
 238                                int             x,
 239                                int             y,
 240                                int             width,
 241                                uint32_t *      buffer,
 242                                const uint32_t *mask,
 243                                uint32_t        mask_bits);
 244
 245 /* Even thought the type of buffer is uint32_t *, the function actually expects
 246  * a uint64_t *buffer.
 247  */
 248 void
 249 _pixman_image_get_scanline_64 (pixman_image_t *image,
 250                                int             x,
 251                                int             y,
 252                                int             width,
 253                                uint32_t *      buffer,
 254                                const uint32_t *unused,
 255                                uint32_t        unused2);
 256
 257 void
 258 _pixman_image_store_scanline_32 (bits_image_t *  image,
 259                                  int             x,
 260                                  int             y,
 261                                  int             width,
 262                                  const uint32_t *buffer);
 263
 264 /* Even though the type of buffer is uint32_t *, the function
 265  * actually expects a uint64_t *buffer.
 266  */
 267 void
 268 _pixman_image_store_scanline_64 (bits_image_t *  image,
 269                                  int             x,
 270                                  int             y,
 271                                  int             width,
 272                                  const uint32_t *buffer);
 273
 274 pixman_image_t *
 275 _pixman_image_allocate (void);
 276
 277 pixman_bool_t
 278 _pixman_init_gradient (gradient_t *                  gradient,
 279                        const pixman_gradient_stop_t *stops,
 280                        int                           n_stops);
 281 void
 282 _pixman_image_reset_clip_region (pixman_image_t *image);
 283
 284 void
 285 _pixman_image_validate (pixman_image_t *image);
 286
 287 pixman_bool_t
 288 _pixman_image_is_opaque (pixman_image_t *image);
 289
 290 uint32_t
 291 _pixman_image_get_solid (pixman_image_t *     image,
 292                          pixman_format_code_t format);
 293
 294 #define PIXMAN_IMAGE_GET_LINE(image, x, y, type, out_stride, line, mul) \
 295     do                                                                  \
 296     {                                                                   \
 297         uint32_t *__bits__;                                             \
 298         int       __stride__;                                           \
 299                                                                         \
 300         __bits__ = image->bits.bits;                                    \
 301         __stride__ = image->bits.rowstride;                             \
 302         (out_stride) =                                                  \
 303             __stride__ * (int) sizeof (uint32_t) / (int) sizeof (type); \
 304         (line) =                                                        \
 305             ((type *) __bits__) + (out_stride) * (y) + (mul) * (x);     \
 306     } while (0)
 307
 308 /*
 309  * Gradient walker
 310  */
 311 typedef struct
 312 {
 313     uint32_t                left_ag;
 314     uint32_t                left_rb;
 315     uint32_t                right_ag;
 316     uint32_t                right_rb;
 317     int32_t                 left_x;
 318     int32_t                 right_x;
 319     int32_t                 stepper;
 320
 321     pixman_gradient_stop_t *stops;
 322     int                     num_stops;
 323     unsigned int            spread;
 324
 325     int                     need_reset;
 326 } pixman_gradient_walker_t;
 327
 328 void
 329 _pixman_gradient_walker_init (pixman_gradient_walker_t *walker,
 330                               gradient_t *              gradient,
 331                               unsigned int              spread);
 332
 333 void
 334 _pixman_gradient_walker_reset (pixman_gradient_walker_t *walker,
 335                                pixman_fixed_32_32_t      pos);
 336
 337 uint32_t
 338 _pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker,
 339                                pixman_fixed_32_32_t      x);
 340
 341 /*
 342  * Edges
 343  */
 344
 345 #define MAX_ALPHA(n)    ((1 << (n)) - 1)
 346 #define N_Y_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) - 1)
 347 #define N_X_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) + 1)
 348
 349 #define STEP_Y_SMALL(n) (pixman_fixed_1 / N_Y_FRAC (n))
 350 #define STEP_Y_BIG(n)   (pixman_fixed_1 - (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 351
 352 #define Y_FRAC_FIRST(n) (STEP_Y_BIG (n) / 2)
 353 #define Y_FRAC_LAST(n)  (Y_FRAC_FIRST (n) + (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 354
 355 #define STEP_X_SMALL(n) (pixman_fixed_1 / N_X_FRAC (n))
 356 #define STEP_X_BIG(n)   (pixman_fixed_1 - (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 357
 358 #define X_FRAC_FIRST(n) (STEP_X_BIG (n) / 2)
 359 #define X_FRAC_LAST(n)  (X_FRAC_FIRST (n) + (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 360
 361 #define RENDER_SAMPLES_X(x, n)                                          \
 362     ((n) == 1? 0 : (pixman_fixed_frac (x) +                             \
 363                     X_FRAC_FIRST (n)) / STEP_X_SMALL (n))
 364
 365 void
 366 pixman_rasterize_edges_accessors (pixman_image_t *image,
 367                                   pixman_edge_t * l,
 368                                   pixman_edge_t * r,
 369                                   pixman_fixed_t  t,
 370                                   pixman_fixed_t  b);
 371
 372 /*
 373  * Implementations
 374  */
 375 typedef struct pixman_implementation_t pixman_implementation_t;
 376
 377 typedef void (*pixman_combine_32_func_t) (pixman_implementation_t *imp,
 378                                           pixman_op_t              op,
 379                                           uint32_t *               dest,
 380                                           const uint32_t *         src,
 381                                           const uint32_t *         mask,
 382                                           int                      width);
 383
 384 typedef void (*pixman_combine_64_func_t) (pixman_implementation_t *imp,
 385                                           pixman_op_t              op,
 386                                           uint64_t *               dest,
 387                                           const uint64_t *         src,
 388                                           const uint64_t *         mask,
 389                                           int                      width);
 390
 391 typedef void (*pixman_composite_func_t) (pixman_implementation_t *imp,
 392                                          pixman_op_t              op,
 393                                          pixman_image_t *         src,
 394                                          pixman_image_t *         mask,
 395                                          pixman_image_t *         dest,
 396                                          int32_t                  src_x,
 397                                          int32_t                  src_y,
 398                                          int32_t                  mask_x,
 399                                          int32_t                  mask_y,
 400                                          int32_t                  dest_x,
 401                                          int32_t                  dest_y,
 402                                          int32_t                  width,
 403                                          int32_t                  height);
 404 typedef pixman_bool_t (*pixman_blt_func_t) (pixman_implementation_t *imp,
 405                                             uint32_t *               src_bits,
 406                                             uint32_t *               dst_bits,
 407                                             int                      src_stride,
 408                                             int                      dst_stride,
 409                                             int                      src_bpp,
 410                                             int                      dst_bpp,
 411                                             int                      src_x,
 412                                             int                      src_y,
 413                                             int                      dst_x,
 414                                             int                      dst_y,
 415                                             int                      width,
 416                                             int                      height);
 417 typedef pixman_bool_t (*pixman_fill_func_t) (pixman_implementation_t *imp,
 418                                              uint32_t *               bits,
 419                                              int                      stride,
 420                                              int                      bpp,
 421                                              int                      x,
 422                                              int                      y,
 423                                              int                      width,
 424                                              int                      height,
 425                                              uint32_t                 xor);
 426
 427 void _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp);
 428 void _pixman_setup_combiner_functions_64 (pixman_implementation_t *imp);
 429
 430 typedef struct
 431 {
 432     pixman_op_t             op;
 433     pixman_format_code_t    src_format;
 434     uint32_t                src_flags;
 435     pixman_format_code_t    mask_format;
 436     uint32_t                mask_flags;
 437     pixman_format_code_t    dest_format;
 438     uint32_t                dest_flags;
 439     pixman_composite_func_t func;
 440 } pixman_fast_path_t;
 441
 442 struct pixman_implementation_t
 443 {
 444     pixman_implementation_t *   toplevel;
 445     pixman_implementation_t *   delegate;
 446     const pixman_fast_path_t *  fast_paths;
 447
 448     pixman_blt_func_t           blt;
 449     pixman_fill_func_t          fill;
 450
 451     pixman_combine_32_func_t    combine_32[PIXMAN_N_OPERATORS];
 452     pixman_combine_32_func_t    combine_32_ca[PIXMAN_N_OPERATORS];
 453     pixman_combine_64_func_t    combine_64[PIXMAN_N_OPERATORS];
 454     pixman_combine_64_func_t    combine_64_ca[PIXMAN_N_OPERATORS];
 455 };
 456
 457 pixman_implementation_t *
 458 _pixman_implementation_create (pixman_implementation_t *delegate,
 459                                const pixman_fast_path_t *fast_paths);
 460
 461 void
 462 _pixman_implementation_combine_32 (pixman_implementation_t *imp,
 463                                    pixman_op_t              op,
 464                                    uint32_t *               dest,
 465                                    const uint32_t *         src,
 466                                    const uint32_t *         mask,
 467                                    int                      width);
 468 void
 469 _pixman_implementation_combine_64 (pixman_implementation_t *imp,
 470                                    pixman_op_t              op,
 471                                    uint64_t *               dest,
 472                                    const uint64_t *         src,
 473                                    const uint64_t *         mask,
 474                                    int                      width);
 475 void
 476 _pixman_implementation_combine_32_ca (pixman_implementation_t *imp,
 477                                       pixman_op_t              op,
 478                                       uint32_t *               dest,
 479                                       const uint32_t *         src,
 480                                       const uint32_t *         mask,
 481                                       int                      width);
 482 void
 483 _pixman_implementation_combine_64_ca (pixman_implementation_t *imp,
 484                                       pixman_op_t              op,
 485                                       uint64_t *               dest,
 486                                       const uint64_t *         src,
 487                                       const uint64_t *         mask,
 488                                       int                      width);
 489
 490 pixman_bool_t
 491 _pixman_implementation_blt (pixman_implementation_t *imp,
 492                             uint32_t *               src_bits,
 493                             uint32_t *               dst_bits,
 494                             int                      src_stride,
 495                             int                      dst_stride,
 496                             int                      src_bpp,
 497                             int                      dst_bpp,
 498                             int                      src_x,
 499                             int                      src_y,
 500                             int                      dst_x,
 501                             int                      dst_y,
 502                             int                      width,
 503                             int                      height);
 504
 505 pixman_bool_t
 506 _pixman_implementation_fill (pixman_implementation_t *imp,
 507                              uint32_t *               bits,
 508                              int                      stride,
 509                              int                      bpp,
 510                              int                      x,
 511                              int                      y,
 512                              int                      width,
 513                              int                      height,
 514                              uint32_t                 xor);
 515
 516 /* Specific implementations */
 517 pixman_implementation_t *
 518 _pixman_implementation_create_general (void);
 519
 520 pixman_implementation_t *
 521 _pixman_implementation_create_fast_path (void);
 522
 523 #ifdef USE_MMX
 524 pixman_implementation_t *
 525 _pixman_implementation_create_mmx (void);
 526 #endif
 527
 528 #ifdef USE_SSE2
 529 pixman_implementation_t *
 530 _pixman_implementation_create_sse2 (void);
 531 #endif
 532
 533 #ifdef USE_ARM_SIMD
 534 pixman_implementation_t *
 535 _pixman_implementation_create_arm_simd (void);
 536 #endif
 537
 538 #ifdef USE_ARM_NEON
 539 pixman_implementation_t *
 540 _pixman_implementation_create_arm_neon (void);
 541 #endif
 542
 543 #ifdef USE_VMX
 544 pixman_implementation_t *
 545 _pixman_implementation_create_vmx (void);
 546 #endif
 547
 548 pixman_implementation_t *
 549 _pixman_choose_implementation (void);
 550
 551
 552
 553 /*
 554  * Utilities
 555  */
 556
 557 /* These "formats" all have depth 0, so they
 558  * will never clash with any real ones
 559  */
 560 #define PIXMAN_null             PIXMAN_FORMAT (0, 0, 0, 0, 0, 0)
 561 #define PIXMAN_solid            PIXMAN_FORMAT (0, 1, 0, 0, 0, 0)
 562 #define PIXMAN_pixbuf           PIXMAN_FORMAT (0, 2, 0, 0, 0, 0)
 563 #define PIXMAN_rpixbuf          PIXMAN_FORMAT (0, 3, 0, 0, 0, 0)
 564 #define PIXMAN_unknown          PIXMAN_FORMAT (0, 4, 0, 0, 0, 0)
 565 #define PIXMAN_any              PIXMAN_FORMAT (0, 5, 0, 0, 0, 0)
 566
 567 #define PIXMAN_OP_any           (PIXMAN_N_OPERATORS + 1)
 568
 569 #define FAST_PATH_ID_TRANSFORM                  (1 <<  0)
 570 #define FAST_PATH_NO_ALPHA_MAP                  (1 <<  1)
 571 #define FAST_PATH_NO_CONVOLUTION_FILTER         (1 <<  2)
 572 #define FAST_PATH_NO_PAD_REPEAT                 (1 <<  3)
 573 #define FAST_PATH_NO_REFLECT_REPEAT             (1 <<  4)
 574 #define FAST_PATH_NO_ACCESSORS                  (1 <<  5)
 575 #define FAST_PATH_NO_WIDE_FORMAT                (1 <<  6)
 576 #define FAST_PATH_COVERS_CLIP                   (1 <<  7)
 577 #define FAST_PATH_COMPONENT_ALPHA               (1 <<  8)
 578 #define FAST_PATH_UNIFIED_ALPHA                 (1 <<  9)
 579 #define FAST_PATH_SCALE_TRANSFORM               (1 << 10)
 580 #define FAST_PATH_NEAREST_FILTER                (1 << 11)
 581 #define FAST_PATH_SIMPLE_REPEAT                 (1 << 12)
 582
 583 #define _FAST_PATH_STANDARD_FLAGS                                       \
 584     (FAST_PATH_ID_TRANSFORM             |                               \
 585      FAST_PATH_NO_ALPHA_MAP             |                               \
 586      FAST_PATH_NO_CONVOLUTION_FILTER    |                               \
 587      FAST_PATH_NO_PAD_REPEAT            |                               \
 588      FAST_PATH_NO_REFLECT_REPEAT        |                               \
 589      FAST_PATH_NO_ACCESSORS             |                               \
 590      FAST_PATH_NO_WIDE_FORMAT           |                               \
 591      FAST_PATH_COVERS_CLIP)
 592
 593 #define FAST_PATH_STD_SRC_FLAGS                                         \
 594     _FAST_PATH_STANDARD_FLAGS
 595 #define FAST_PATH_STD_MASK_U_FLAGS                                      \
 596     (_FAST_PATH_STANDARD_FLAGS          |                               \
 597      FAST_PATH_UNIFIED_ALPHA)
 598 #define FAST_PATH_STD_MASK_CA_FLAGS                                     \
 599     (_FAST_PATH_STANDARD_FLAGS          |                               \
 600      FAST_PATH_COMPONENT_ALPHA)
 601 #define FAST_PATH_STD_DEST_FLAGS                                        \
 602     (FAST_PATH_NO_ACCESSORS             |                               \
 603      FAST_PATH_NO_WIDE_FORMAT)
 604
 605 #define FAST_PATH(op, src, src_flags, mask, mask_flags, dest, dest_flags, func) \
 606     PIXMAN_OP_ ## op,                                                   \
 607     PIXMAN_ ## src,                                                     \
 608     src_flags,                                                          \
 609     PIXMAN_ ## mask,                                                    \
 610     mask_flags,                                                         \
 611     PIXMAN_ ## dest,                                                    \
 612     dest_flags,                                                         \
 613     func
 614
 615 #define PIXMAN_STD_FAST_PATH(op, src, mask, dest, func)                 \
 616     { FAST_PATH (                                                       \
 617           op,                                                           \
 618           src, FAST_PATH_STD_SRC_FLAGS,                                 \
 619           mask, (PIXMAN_ ## mask) ? FAST_PATH_STD_MASK_U_FLAGS : 0,     \
 620           dest, FAST_PATH_STD_DEST_FLAGS,                               \
 621           func) }
 622
 623 #define PIXMAN_STD_FAST_PATH_CA(op, src, mask, dest, func)              \
 624     { FAST_PATH (                                                       \
 625           op,                                                           \
 626           src, FAST_PATH_STD_SRC_FLAGS,                                 \
 627           mask, FAST_PATH_STD_MASK_CA_FLAGS,                            \
 628           dest, FAST_PATH_STD_DEST_FLAGS,                               \
 629           func) }
 630
 631 /* Memory allocation helpers */
 632 void *
 633 pixman_malloc_ab (unsigned int n, unsigned int b);
 634
 635 void *
 636 pixman_malloc_abc (unsigned int a, unsigned int b, unsigned int c);
 637
 638 pixman_bool_t
 639 pixman_multiply_overflows_int (unsigned int a, unsigned int b);
 640
 641 pixman_bool_t
 642 pixman_addition_overflows_int (unsigned int a, unsigned int b);
 643
 644 /* Compositing utilities */
 645 void
 646 pixman_expand (uint64_t *           dst,
 647                const uint32_t *     src,
 648                pixman_format_code_t format,
 649                int                  width);
 650
 651 void
 652 pixman_contract (uint32_t *      dst,
 653                  const uint64_t *src,
 654                  int             width);
 655
 656
 657 /* Region Helpers */
 658 pixman_bool_t
 659 pixman_region32_copy_from_region16 (pixman_region32_t *dst,
 660                                     pixman_region16_t *src);
 661
 662 pixman_bool_t
 663 pixman_region16_copy_from_region32 (pixman_region16_t *dst,
 664                                     pixman_region32_t *src);
 665
 666
 667 /* Misc macros */
 668
 669 #ifndef FALSE
 670 #   define FALSE 0
 671 #endif
 672
 673 #ifndef TRUE
 674 #   define TRUE 1
 675 #endif
 676
 677 #ifndef MIN
 678 #  define MIN(a, b) ((a < b) ? a : b)
 679 #endif
 680
 681 #ifndef MAX
 682 #  define MAX(a, b) ((a > b) ? a : b)
 683 #endif
 684
 685 /* Integer division that rounds towards -infinity */
 686 #define DIV(a, b)                                          \
 687     ((((a) < 0) == ((b) < 0)) ? (a) / (b) :                \
 688      ((a) - (b) + 1 - (((b) < 0) << 1)) / (b))
 689
 690 /* Modulus that produces the remainder wrt. DIV */
 691 #define MOD(a, b) ((a) < 0 ? ((b) - ((-(a) - 1) % (b))) - 1 : (a) % (b))
 692
 693 #define CLIP(v, low, high) ((v) < (low) ? (low) : ((v) > (high) ? (high) : (v)))
 694
 695 /* Conversion between 8888 and 0565 */
 696
 697 #define CONVERT_8888_TO_0565(s)                                         \
 698     ((((s) >> 3) & 0x001f) |                                            \
 699      (((s) >> 5) & 0x07e0) |                                            \
 700      (((s) >> 8) & 0xf800))
 701
 702 #define CONVERT_0565_TO_0888(s)                                         \
 703     (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) |                       \
 704      ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) |                   \
 705      ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)))
 706
 707 #define PIXMAN_FORMAT_IS_WIDE(f)                                        \
 708     (PIXMAN_FORMAT_A (f) > 8 ||                                         \
 709      PIXMAN_FORMAT_R (f) > 8 ||                                         \
 710      PIXMAN_FORMAT_G (f) > 8 ||                                         \
 711      PIXMAN_FORMAT_B (f) > 8)
 712
 713 #ifdef WORDS_BIGENDIAN
 714 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) << (n))
 715 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) >> (n))
 716 #else
 717 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) >> (n))
 718 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) << (n))
 719 #endif
 720
 721 /*
 722  * Various debugging code
 723  */
 724
 725 #undef DEBUG
 726
 727 /* Turn on debugging depending on what type of release this is
 728  */
 729 #if (((PIXMAN_VERSION_MICRO % 2) == 0) && ((PIXMAN_VERSION_MINOR % 2) == 1))
 730
 731 /* Debugging gets turned on for development releases because these
 732  * are the things that end up in bleeding edge distributions such
 733  * as Rawhide etc.
 734  *
 735  * For performance reasons we don't turn it on for stable releases or
 736  * random git checkouts. (Random git checkouts are often used for
 737  * performance work).
 738  */
 739
 740 #    define DEBUG
 741
 742 #endif
 743
 744 #ifdef DEBUG
 745
 746 void
 747 _pixman_log_error (const char *function, const char *message);
 748
 749 #define return_if_fail(expr)                                            \
 750     do                                                                  \
 751     {                                                                   \
 752         if (!(expr))                                                    \
 753         {                                                               \
 754             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 755             return;                                                     \
 756         }                                                               \
 757     }                                                                   \
 758     while (0)
 759
 760 #define return_val_if_fail(expr, retval)                                \
 761     do                                                                  \
 762     {                                                                   \
 763         if (!(expr))                                                    \
 764         {                                                               \
 765             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 766             return (retval);                                            \
 767         }                                                               \
 768     }                                                                   \
 769     while (0)
 770
 771 #define critical_if_fail(expr)                                          \
 772     do                                                                  \
 773     {                                                                   \
 774         if (!(expr))                                                    \
 775             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 776     }                                                                   \
 777     while (0)
 778
 779
 780 #else
 781
 782 #define _pixman_log_error(f,m) do { } while (0)                         \
 783
 784 #define return_if_fail(expr)                                            \
 785     do                                                                  \
 786     {                                                                   \
 787         if (!(expr))                                                    \
 788             return;                                                     \
 789     }                                                                   \
 790     while (0)
 791
 792 #define return_val_if_fail(expr, retval)                                \
 793     do                                                                  \
 794     {                                                                   \
 795         if (!(expr))                                                    \
 796             return (retval);                                            \
 797     }                                                                   \
 798     while (0)
 799
 800 #define critical_if_fail(expr)                                          \
 801     do                                                                  \
 802     {                                                                   \
 803     }                                                                   \
 804     while (0)
 805 #endif
 806
 807 /*
 808  * Timers
 809  */
 810
 811 #ifdef PIXMAN_TIMERS
 812
 813 static inline uint64_t
 814 oil_profile_stamp_rdtsc (void)
 815 {
 816     uint64_t ts;
 817
 818     __asm__ __volatile__ ("rdtsc\n" : "=A" (ts));
 819     return ts;
 820 }
 821
 822 #define OIL_STAMP oil_profile_stamp_rdtsc
 823
 824 typedef struct pixman_timer_t pixman_timer_t;
 825
 826 struct pixman_timer_t
 827 {
 828     int             initialized;
 829     const char *    name;
 830     uint64_t        n_times;
 831     uint64_t        total;
 832     pixman_timer_t *next;
 833 };
 834
 835 extern int timer_defined;
 836
 837 void pixman_timer_register (pixman_timer_t *timer);
 838
 839 #define TIMER_BEGIN(tname)                                              \
 840     {                                                                   \
 841         static pixman_timer_t timer ## tname;                           \
 842         uint64_t              begin ## tname;                           \
 843                                                                         \
 844         if (!timer ## tname.initialized)                                \
 845         {                                                               \
 846             timer ## tname.initialized = 1;                             \
 847             timer ## tname.name = # tname;                              \
 848             pixman_timer_register (&timer ## tname);                    \
 849         }                                                               \
 850                                                                         \
 851         timer ## tname.n_times++;                                       \
 852         begin ## tname = OIL_STAMP ();
 853
 854 #define TIMER_END(tname)                                                \
 855     timer ## tname.total += OIL_STAMP () - begin ## tname;              \
 856     }
 857
 858 #endif /* PIXMAN_TIMERS */
 859
 860 #endif /* PIXMAN_PRIVATE_H */