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_transform_t *        transform;
  90     pixman_repeat_t             repeat;
  91     pixman_filter_t             filter;
  92     pixman_fixed_t *            filter_params;
  93     int                         n_filter_params;
  94     bits_image_t *              alpha_map;
  95     int                         alpha_origin_x;
  96     int                         alpha_origin_y;
  97     pixman_bool_t               component_alpha;
  98     classify_func_t             classify;
  99     property_changed_func_t     property_changed;
 100     fetch_scanline_t            get_scanline_32;
 101     fetch_scanline_t            get_scanline_64;
 102
 103     pixman_image_destroy_func_t destroy_func;
 104     void *                      destroy_data;
 105
 106     uint32_t                    flags;
 107     pixman_format_code_t        extended_format_code;
 108 };
 109
 110 struct source_image
 111 {
 112     image_common_t common;
 113     source_image_class_t class;
 114 };
 115
 116 struct solid_fill
 117 {
 118     source_image_t common;
 119     pixman_color_t color;
 120
 121     uint32_t       color_32;
 122     uint64_t       color_64;
 123 };
 124
 125 struct gradient
 126 {
 127     source_image_t          common;
 128     int                     n_stops;
 129     pixman_gradient_stop_t *stops;
 130     int                     stop_range;
 131 };
 132
 133 struct linear_gradient
 134 {
 135     gradient_t           common;
 136     pixman_point_fixed_t p1;
 137     pixman_point_fixed_t p2;
 138 };
 139
 140 struct circle
 141 {
 142     pixman_fixed_t x;
 143     pixman_fixed_t y;
 144     pixman_fixed_t radius;
 145 };
 146
 147 struct radial_gradient
 148 {
 149     gradient_t common;
 150
 151     circle_t   c1;
 152     circle_t   c2;
 153     double     cdx;
 154     double     cdy;
 155     double     dr;
 156     double     A;
 157 };
 158
 159 struct conical_gradient
 160 {
 161     gradient_t           common;
 162     pixman_point_fixed_t center;
 163     pixman_fixed_t       angle;
 164 };
 165
 166 struct bits_image
 167 {
 168     image_common_t             common;
 169     pixman_format_code_t       format;
 170     const pixman_indexed_t *   indexed;
 171     int                        width;
 172     int                        height;
 173     uint32_t *                 bits;
 174     uint32_t *                 free_me;
 175     int                        rowstride;  /* in number of uint32_t's */
 176
 177     /* Fetch a pixel, disregarding alpha maps, transformations etc. */
 178     fetch_pixel_32_t           fetch_pixel_raw_32;
 179     fetch_pixel_64_t           fetch_pixel_raw_64;
 180
 181     /* Fetch a pixel, taking alpha maps into account */
 182     fetch_pixel_32_t           fetch_pixel_32;
 183     fetch_pixel_64_t           fetch_pixel_64;
 184
 185     /* Fetch raw scanlines, with no regard for transformations, alpha maps etc. */
 186     fetch_scanline_t           fetch_scanline_raw_32;
 187     fetch_scanline_t           fetch_scanline_raw_64;
 188
 189     /* Store scanlines with no regard for alpha maps */
 190     store_scanline_t           store_scanline_raw_32;
 191     store_scanline_t           store_scanline_raw_64;
 192
 193     /* Store a scanline, taking alpha maps into account */
 194     store_scanline_t           store_scanline_32;
 195     store_scanline_t           store_scanline_64;
 196
 197     /* Used for indirect access to the bits */
 198     pixman_read_memory_func_t  read_func;
 199     pixman_write_memory_func_t write_func;
 200 };
 201
 202 union pixman_image
 203 {
 204     image_type_t       type;
 205     image_common_t     common;
 206     bits_image_t       bits;
 207     source_image_t     source;
 208     gradient_t         gradient;
 209     linear_gradient_t  linear;
 210     conical_gradient_t conical;
 211     radial_gradient_t  radial;
 212     solid_fill_t       solid;
 213 };
 214
 215
 216 void
 217 _pixman_bits_image_setup_raw_accessors (bits_image_t *image);
 218
 219 void
 220 _pixman_image_get_scanline_generic_64  (pixman_image_t *image,
 221                                         int             x,
 222                                         int             y,
 223                                         int             width,
 224                                         uint32_t *      buffer,
 225                                         const uint32_t *mask,
 226                                         uint32_t        mask_bits);
 227
 228 source_image_class_t
 229 _pixman_image_classify (pixman_image_t *image,
 230                         int             x,
 231                         int             y,
 232                         int             width,
 233                         int             height);
 234
 235 void
 236 _pixman_image_get_scanline_32 (pixman_image_t *image,
 237                                int             x,
 238                                int             y,
 239                                int             width,
 240                                uint32_t *      buffer,
 241                                const uint32_t *mask,
 242                                uint32_t        mask_bits);
 243
 244 /* Even thought the type of buffer is uint32_t *, the function actually expects
 245  * a uint64_t *buffer.
 246  */
 247 void
 248 _pixman_image_get_scanline_64 (pixman_image_t *image,
 249                                int             x,
 250                                int             y,
 251                                int             width,
 252                                uint32_t *      buffer,
 253                                const uint32_t *unused,
 254                                uint32_t        unused2);
 255
 256 void
 257 _pixman_image_store_scanline_32 (bits_image_t *  image,
 258                                  int             x,
 259                                  int             y,
 260                                  int             width,
 261                                  const uint32_t *buffer);
 262
 263 /* Even though the type of buffer is uint32_t *, the function
 264  * actually expects a uint64_t *buffer.
 265  */
 266 void
 267 _pixman_image_store_scanline_64 (bits_image_t *  image,
 268                                  int             x,
 269                                  int             y,
 270                                  int             width,
 271                                  const uint32_t *buffer);
 272
 273 pixman_image_t *
 274 _pixman_image_allocate (void);
 275
 276 pixman_bool_t
 277 _pixman_init_gradient (gradient_t *                  gradient,
 278                        const pixman_gradient_stop_t *stops,
 279                        int                           n_stops);
 280 void
 281 _pixman_image_reset_clip_region (pixman_image_t *image);
 282
 283 void
 284 _pixman_image_validate (pixman_image_t *image);
 285
 286 uint32_t
 287 _pixman_image_get_solid (pixman_image_t *     image,
 288                          pixman_format_code_t format);
 289
 290 #define PIXMAN_IMAGE_GET_LINE(image, x, y, type, out_stride, line, mul) \
 291     do                                                                  \
 292     {                                                                   \
 293         uint32_t *__bits__;                                             \
 294         int       __stride__;                                           \
 295                                                                         \
 296         __bits__ = image->bits.bits;                                    \
 297         __stride__ = image->bits.rowstride;                             \
 298         (out_stride) =                                                  \
 299             __stride__ * (int) sizeof (uint32_t) / (int) sizeof (type); \
 300         (line) =                                                        \
 301             ((type *) __bits__) + (out_stride) * (y) + (mul) * (x);     \
 302     } while (0)
 303
 304 /*
 305  * Gradient walker
 306  */
 307 typedef struct
 308 {
 309     uint32_t                left_ag;
 310     uint32_t                left_rb;
 311     uint32_t                right_ag;
 312     uint32_t                right_rb;
 313     int32_t                 left_x;
 314     int32_t                 right_x;
 315     int32_t                 stepper;
 316
 317     pixman_gradient_stop_t *stops;
 318     int                     num_stops;
 319     unsigned int            spread;
 320
 321     int                     need_reset;
 322 } pixman_gradient_walker_t;
 323
 324 void
 325 _pixman_gradient_walker_init (pixman_gradient_walker_t *walker,
 326                               gradient_t *              gradient,
 327                               unsigned int              spread);
 328
 329 void
 330 _pixman_gradient_walker_reset (pixman_gradient_walker_t *walker,
 331                                pixman_fixed_32_32_t      pos);
 332
 333 uint32_t
 334 _pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker,
 335                                pixman_fixed_32_32_t      x);
 336
 337 /*
 338  * Edges
 339  */
 340
 341 #define MAX_ALPHA(n)    ((1 << (n)) - 1)
 342 #define N_Y_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) - 1)
 343 #define N_X_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) + 1)
 344
 345 #define STEP_Y_SMALL(n) (pixman_fixed_1 / N_Y_FRAC (n))
 346 #define STEP_Y_BIG(n)   (pixman_fixed_1 - (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 347
 348 #define Y_FRAC_FIRST(n) (STEP_Y_BIG (n) / 2)
 349 #define Y_FRAC_LAST(n)  (Y_FRAC_FIRST (n) + (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 350
 351 #define STEP_X_SMALL(n) (pixman_fixed_1 / N_X_FRAC (n))
 352 #define STEP_X_BIG(n)   (pixman_fixed_1 - (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 353
 354 #define X_FRAC_FIRST(n) (STEP_X_BIG (n) / 2)
 355 #define X_FRAC_LAST(n)  (X_FRAC_FIRST (n) + (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 356
 357 #define RENDER_SAMPLES_X(x, n)                                          \
 358     ((n) == 1? 0 : (pixman_fixed_frac (x) +                             \
 359                     X_FRAC_FIRST (n)) / STEP_X_SMALL (n))
 360
 361 void
 362 pixman_rasterize_edges_accessors (pixman_image_t *image,
 363                                   pixman_edge_t * l,
 364                                   pixman_edge_t * r,
 365                                   pixman_fixed_t  t,
 366                                   pixman_fixed_t  b);
 367
 368 /*
 369  * Implementations
 370  */
 371 typedef struct pixman_implementation_t pixman_implementation_t;
 372
 373 typedef void (*pixman_combine_32_func_t) (pixman_implementation_t *imp,
 374                                           pixman_op_t              op,
 375                                           uint32_t *               dest,
 376                                           const uint32_t *         src,
 377                                           const uint32_t *         mask,
 378                                           int                      width);
 379
 380 typedef void (*pixman_combine_64_func_t) (pixman_implementation_t *imp,
 381                                           pixman_op_t              op,
 382                                           uint64_t *               dest,
 383                                           const uint64_t *         src,
 384                                           const uint64_t *         mask,
 385                                           int                      width);
 386
 387 typedef void (*pixman_composite_func_t) (pixman_implementation_t *imp,
 388                                          pixman_op_t              op,
 389                                          pixman_image_t *         src,
 390                                          pixman_image_t *         mask,
 391                                          pixman_image_t *         dest,
 392                                          int32_t                  src_x,
 393                                          int32_t                  src_y,
 394                                          int32_t                  mask_x,
 395                                          int32_t                  mask_y,
 396                                          int32_t                  dest_x,
 397                                          int32_t                  dest_y,
 398                                          int32_t                  width,
 399                                          int32_t                  height);
 400 typedef pixman_bool_t (*pixman_blt_func_t) (pixman_implementation_t *imp,
 401                                             uint32_t *               src_bits,
 402                                             uint32_t *               dst_bits,
 403                                             int                      src_stride,
 404                                             int                      dst_stride,
 405                                             int                      src_bpp,
 406                                             int                      dst_bpp,
 407                                             int                      src_x,
 408                                             int                      src_y,
 409                                             int                      dst_x,
 410                                             int                      dst_y,
 411                                             int                      width,
 412                                             int                      height);
 413 typedef pixman_bool_t (*pixman_fill_func_t) (pixman_implementation_t *imp,
 414                                              uint32_t *               bits,
 415                                              int                      stride,
 416                                              int                      bpp,
 417                                              int                      x,
 418                                              int                      y,
 419                                              int                      width,
 420                                              int                      height,
 421                                              uint32_t                 xor);
 422
 423 void _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp);
 424 void _pixman_setup_combiner_functions_64 (pixman_implementation_t *imp);
 425
 426 typedef struct
 427 {
 428     pixman_op_t             op;
 429     pixman_format_code_t    src_format;
 430     uint32_t                src_flags;
 431     pixman_format_code_t    mask_format;
 432     uint32_t                mask_flags;
 433     pixman_format_code_t    dest_format;
 434     uint32_t                dest_flags;
 435     pixman_composite_func_t func;
 436 } pixman_fast_path_t;
 437
 438 struct pixman_implementation_t
 439 {
 440     pixman_implementation_t *   toplevel;
 441     pixman_implementation_t *   delegate;
 442     const pixman_fast_path_t *  fast_paths;
 443
 444     pixman_blt_func_t           blt;
 445     pixman_fill_func_t          fill;
 446
 447     pixman_combine_32_func_t    combine_32[PIXMAN_N_OPERATORS];
 448     pixman_combine_32_func_t    combine_32_ca[PIXMAN_N_OPERATORS];
 449     pixman_combine_64_func_t    combine_64[PIXMAN_N_OPERATORS];
 450     pixman_combine_64_func_t    combine_64_ca[PIXMAN_N_OPERATORS];
 451 };
 452
 453 pixman_implementation_t *
 454 _pixman_implementation_create (pixman_implementation_t *delegate,
 455                                const pixman_fast_path_t *fast_paths);
 456
 457 void
 458 _pixman_implementation_combine_32 (pixman_implementation_t *imp,
 459                                    pixman_op_t              op,
 460                                    uint32_t *               dest,
 461                                    const uint32_t *         src,
 462                                    const uint32_t *         mask,
 463                                    int                      width);
 464 void
 465 _pixman_implementation_combine_64 (pixman_implementation_t *imp,
 466                                    pixman_op_t              op,
 467                                    uint64_t *               dest,
 468                                    const uint64_t *         src,
 469                                    const uint64_t *         mask,
 470                                    int                      width);
 471 void
 472 _pixman_implementation_combine_32_ca (pixman_implementation_t *imp,
 473                                       pixman_op_t              op,
 474                                       uint32_t *               dest,
 475                                       const uint32_t *         src,
 476                                       const uint32_t *         mask,
 477                                       int                      width);
 478 void
 479 _pixman_implementation_combine_64_ca (pixman_implementation_t *imp,
 480                                       pixman_op_t              op,
 481                                       uint64_t *               dest,
 482                                       const uint64_t *         src,
 483                                       const uint64_t *         mask,
 484                                       int                      width);
 485
 486 pixman_bool_t
 487 _pixman_implementation_blt (pixman_implementation_t *imp,
 488                             uint32_t *               src_bits,
 489                             uint32_t *               dst_bits,
 490                             int                      src_stride,
 491                             int                      dst_stride,
 492                             int                      src_bpp,
 493                             int                      dst_bpp,
 494                             int                      src_x,
 495                             int                      src_y,
 496                             int                      dst_x,
 497                             int                      dst_y,
 498                             int                      width,
 499                             int                      height);
 500
 501 pixman_bool_t
 502 _pixman_implementation_fill (pixman_implementation_t *imp,
 503                              uint32_t *               bits,
 504                              int                      stride,
 505                              int                      bpp,
 506                              int                      x,
 507                              int                      y,
 508                              int                      width,
 509                              int                      height,
 510                              uint32_t                 xor);
 511
 512 /* Specific implementations */
 513 pixman_implementation_t *
 514 _pixman_implementation_create_general (void);
 515
 516 pixman_implementation_t *
 517 _pixman_implementation_create_fast_path (void);
 518
 519 #ifdef USE_MMX
 520 pixman_implementation_t *
 521 _pixman_implementation_create_mmx (void);
 522 #endif
 523
 524 #ifdef USE_SSE2
 525 pixman_implementation_t *
 526 _pixman_implementation_create_sse2 (void);
 527 #endif
 528
 529 #ifdef USE_ARM_SIMD
 530 pixman_implementation_t *
 531 _pixman_implementation_create_arm_simd (void);
 532 #endif
 533
 534 #ifdef USE_ARM_NEON
 535 pixman_implementation_t *
 536 _pixman_implementation_create_arm_neon (void);
 537 #endif
 538
 539 #ifdef USE_VMX
 540 pixman_implementation_t *
 541 _pixman_implementation_create_vmx (void);
 542 #endif
 543
 544 pixman_implementation_t *
 545 _pixman_choose_implementation (void);
 546
 547
 548
 549 /*
 550  * Utilities
 551  */
 552
 553 /* These "formats" all have depth 0, so they
 554  * will never clash with any real ones
 555  */
 556 #define PIXMAN_null             PIXMAN_FORMAT (0, 0, 0, 0, 0, 0)
 557 #define PIXMAN_solid            PIXMAN_FORMAT (0, 1, 0, 0, 0, 0)
 558 #define PIXMAN_pixbuf           PIXMAN_FORMAT (0, 2, 0, 0, 0, 0)
 559 #define PIXMAN_rpixbuf          PIXMAN_FORMAT (0, 3, 0, 0, 0, 0)
 560 #define PIXMAN_unknown          PIXMAN_FORMAT (0, 4, 0, 0, 0, 0)
 561 #define PIXMAN_any              PIXMAN_FORMAT (0, 5, 0, 0, 0, 0)
 562
 563 #define PIXMAN_OP_any           (PIXMAN_N_OPERATORS + 1)
 564
 565 #define FAST_PATH_ID_TRANSFORM                  (1 <<  0)
 566 #define FAST_PATH_NO_ALPHA_MAP                  (1 <<  1)
 567 #define FAST_PATH_NO_CONVOLUTION_FILTER         (1 <<  2)
 568 #define FAST_PATH_NO_PAD_REPEAT                 (1 <<  3)
 569 #define FAST_PATH_NO_REFLECT_REPEAT             (1 <<  4)
 570 #define FAST_PATH_NO_ACCESSORS                  (1 <<  5)
 571 #define FAST_PATH_NO_WIDE_FORMAT                (1 <<  6)
 572 #define FAST_PATH_COVERS_CLIP                   (1 <<  7)
 573 #define FAST_PATH_COMPONENT_ALPHA               (1 <<  8)
 574 #define FAST_PATH_UNIFIED_ALPHA                 (1 <<  9)
 575 #define FAST_PATH_SCALE_TRANSFORM               (1 << 10)
 576 #define FAST_PATH_NEAREST_FILTER                (1 << 11)
 577 #define FAST_PATH_SIMPLE_REPEAT                 (1 << 12)
 578 #define FAST_PATH_IS_OPAQUE                     (1 << 13)
 579 #define FAST_PATH_NEEDS_WORKAROUND              (1 << 14)
 580
 581 #define _FAST_PATH_STANDARD_FLAGS                                       \
 582     (FAST_PATH_ID_TRANSFORM             |                               \
 583      FAST_PATH_NO_ALPHA_MAP             |                               \
 584      FAST_PATH_NO_CONVOLUTION_FILTER    |                               \
 585      FAST_PATH_NO_PAD_REPEAT            |                               \
 586      FAST_PATH_NO_REFLECT_REPEAT        |                               \
 587      FAST_PATH_NO_ACCESSORS             |                               \
 588      FAST_PATH_NO_WIDE_FORMAT           |                               \
 589      FAST_PATH_COVERS_CLIP)
 590
 591 #define FAST_PATH_STD_SRC_FLAGS                                         \
 592     _FAST_PATH_STANDARD_FLAGS
 593 #define FAST_PATH_STD_MASK_U_FLAGS                                      \
 594     (_FAST_PATH_STANDARD_FLAGS          |                               \
 595      FAST_PATH_UNIFIED_ALPHA)
 596 #define FAST_PATH_STD_MASK_CA_FLAGS                                     \
 597     (_FAST_PATH_STANDARD_FLAGS          |                               \
 598      FAST_PATH_COMPONENT_ALPHA)
 599 #define FAST_PATH_STD_DEST_FLAGS                                        \
 600     (FAST_PATH_NO_ACCESSORS             |                               \
 601      FAST_PATH_NO_WIDE_FORMAT)
 602
 603 #define FAST_PATH(op, src, src_flags, mask, mask_flags, dest, dest_flags, func) \
 604     PIXMAN_OP_ ## op,                                                   \
 605     PIXMAN_ ## src,                                                     \
 606     src_flags,                                                          \
 607     PIXMAN_ ## mask,                                                    \
 608     mask_flags,                                                         \
 609     PIXMAN_ ## dest,                                                    \
 610     dest_flags,                                                         \
 611     func
 612
 613 #define PIXMAN_STD_FAST_PATH(op, src, mask, dest, func)                 \
 614     { FAST_PATH (                                                       \
 615           op,                                                           \
 616           src, FAST_PATH_STD_SRC_FLAGS,                                 \
 617           mask, (PIXMAN_ ## mask) ? FAST_PATH_STD_MASK_U_FLAGS : 0,     \
 618           dest, FAST_PATH_STD_DEST_FLAGS,                               \
 619           func) }
 620
 621 #define PIXMAN_STD_FAST_PATH_CA(op, src, mask, dest, func)              \
 622     { FAST_PATH (                                                       \
 623           op,                                                           \
 624           src, FAST_PATH_STD_SRC_FLAGS,                                 \
 625           mask, FAST_PATH_STD_MASK_CA_FLAGS,                            \
 626           dest, FAST_PATH_STD_DEST_FLAGS,                               \
 627           func) }
 628
 629 /* Memory allocation helpers */
 630 void *
 631 pixman_malloc_ab (unsigned int n, unsigned int b);
 632
 633 void *
 634 pixman_malloc_abc (unsigned int a, unsigned int b, unsigned int c);
 635
 636 pixman_bool_t
 637 pixman_multiply_overflows_int (unsigned int a, unsigned int b);
 638
 639 pixman_bool_t
 640 pixman_addition_overflows_int (unsigned int a, unsigned int b);
 641
 642 /* Compositing utilities */
 643 void
 644 pixman_expand (uint64_t *           dst,
 645                const uint32_t *     src,
 646                pixman_format_code_t format,
 647                int                  width);
 648
 649 void
 650 pixman_contract (uint32_t *      dst,
 651                  const uint64_t *src,
 652                  int             width);
 653
 654
 655 /* Region Helpers */
 656 pixman_bool_t
 657 pixman_region32_copy_from_region16 (pixman_region32_t *dst,
 658                                     pixman_region16_t *src);
 659
 660 pixman_bool_t
 661 pixman_region16_copy_from_region32 (pixman_region16_t *dst,
 662                                     pixman_region32_t *src);
 663
 664
 665 /* Misc macros */
 666
 667 #ifndef FALSE
 668 #   define FALSE 0
 669 #endif
 670
 671 #ifndef TRUE
 672 #   define TRUE 1
 673 #endif
 674
 675 #ifndef MIN
 676 #  define MIN(a, b) ((a < b) ? a : b)
 677 #endif
 678
 679 #ifndef MAX
 680 #  define MAX(a, b) ((a > b) ? a : b)
 681 #endif
 682
 683 /* Integer division that rounds towards -infinity */
 684 #define DIV(a, b)                                          \
 685     ((((a) < 0) == ((b) < 0)) ? (a) / (b) :                \
 686      ((a) - (b) + 1 - (((b) < 0) << 1)) / (b))
 687
 688 /* Modulus that produces the remainder wrt. DIV */
 689 #define MOD(a, b) ((a) < 0 ? ((b) - ((-(a) - 1) % (b))) - 1 : (a) % (b))
 690
 691 #define CLIP(v, low, high) ((v) < (low) ? (low) : ((v) > (high) ? (high) : (v)))
 692
 693 /* Conversion between 8888 and 0565 */
 694
 695 #define CONVERT_8888_TO_0565(s)                                         \
 696     ((((s) >> 3) & 0x001f) |                                            \
 697      (((s) >> 5) & 0x07e0) |                                            \
 698      (((s) >> 8) & 0xf800))
 699
 700 #define CONVERT_0565_TO_0888(s)                                         \
 701     (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) |                       \
 702      ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) |                   \
 703      ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)))
 704
 705 #define PIXMAN_FORMAT_IS_WIDE(f)                                        \
 706     (PIXMAN_FORMAT_A (f) > 8 ||                                         \
 707      PIXMAN_FORMAT_R (f) > 8 ||                                         \
 708      PIXMAN_FORMAT_G (f) > 8 ||                                         \
 709      PIXMAN_FORMAT_B (f) > 8)
 710
 711 #ifdef WORDS_BIGENDIAN
 712 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) << (n))
 713 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) >> (n))
 714 #else
 715 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) >> (n))
 716 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) << (n))
 717 #endif
 718
 719 /*
 720  * Various debugging code
 721  */
 722
 723 #undef DEBUG
 724
 725 /* Turn on debugging depending on what type of release this is
 726  */
 727 #if (((PIXMAN_VERSION_MICRO % 2) == 0) && ((PIXMAN_VERSION_MINOR % 2) == 1))
 728
 729 /* Debugging gets turned on for development releases because these
 730  * are the things that end up in bleeding edge distributions such
 731  * as Rawhide etc.
 732  *
 733  * For performance reasons we don't turn it on for stable releases or
 734  * random git checkouts. (Random git checkouts are often used for
 735  * performance work).
 736  */
 737
 738 #    define DEBUG
 739
 740 #endif
 741
 742 #ifdef DEBUG
 743
 744 void
 745 _pixman_log_error (const char *function, const char *message);
 746
 747 #define return_if_fail(expr)                                            \
 748     do                                                                  \
 749     {                                                                   \
 750         if (!(expr))                                                    \
 751         {                                                               \
 752             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 753             return;                                                     \
 754         }                                                               \
 755     }                                                                   \
 756     while (0)
 757
 758 #define return_val_if_fail(expr, retval)                                \
 759     do                                                                  \
 760     {                                                                   \
 761         if (!(expr))                                                    \
 762         {                                                               \
 763             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 764             return (retval);                                            \
 765         }                                                               \
 766     }                                                                   \
 767     while (0)
 768
 769 #define critical_if_fail(expr)                                          \
 770     do                                                                  \
 771     {                                                                   \
 772         if (!(expr))                                                    \
 773             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 774     }                                                                   \
 775     while (0)
 776
 777
 778 #else
 779
 780 #define _pixman_log_error(f,m) do { } while (0)                         \
 781
 782 #define return_if_fail(expr)                                            \
 783     do                                                                  \
 784     {                                                                   \
 785         if (!(expr))                                                    \
 786             return;                                                     \
 787     }                                                                   \
 788     while (0)
 789
 790 #define return_val_if_fail(expr, retval)                                \
 791     do                                                                  \
 792     {                                                                   \
 793         if (!(expr))                                                    \
 794             return (retval);                                            \
 795     }                                                                   \
 796     while (0)
 797
 798 #define critical_if_fail(expr)                                          \
 799     do                                                                  \
 800     {                                                                   \
 801     }                                                                   \
 802     while (0)
 803 #endif
 804
 805 /*
 806  * Timers
 807  */
 808
 809 #ifdef PIXMAN_TIMERS
 810
 811 static inline uint64_t
 812 oil_profile_stamp_rdtsc (void)
 813 {
 814     uint64_t ts;
 815
 816     __asm__ __volatile__ ("rdtsc\n" : "=A" (ts));
 817     return ts;
 818 }
 819
 820 #define OIL_STAMP oil_profile_stamp_rdtsc
 821
 822 typedef struct pixman_timer_t pixman_timer_t;
 823
 824 struct pixman_timer_t
 825 {
 826     int             initialized;
 827     const char *    name;
 828     uint64_t        n_times;
 829     uint64_t        total;
 830     pixman_timer_t *next;
 831 };
 832
 833 extern int timer_defined;
 834
 835 void pixman_timer_register (pixman_timer_t *timer);
 836
 837 #define TIMER_BEGIN(tname)                                              \
 838     {                                                                   \
 839         static pixman_timer_t timer ## tname;                           \
 840         uint64_t              begin ## tname;                           \
 841                                                                         \
 842         if (!timer ## tname.initialized)                                \
 843         {                                                               \
 844             timer ## tname.initialized = 1;                             \
 845             timer ## tname.name = # tname;                              \
 846             pixman_timer_register (&timer ## tname);                    \
 847         }                                                               \
 848                                                                         \
 849         timer ## tname.n_times++;                                       \
 850         begin ## tname = OIL_STAMP ();
 851
 852 #define TIMER_END(tname)                                                \
 853     timer ## tname.total += OIL_STAMP () - begin ## tname;              \
 854     }
 855
 856 #endif /* PIXMAN_TIMERS */
 857
 858 #endif /* PIXMAN_PRIVATE_H */