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     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
 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
 243 /* Even thought the type of buffer is uint32_t *, the function actually expects
 244  * a uint64_t *buffer.
 245  */
 246 void
 247 _pixman_image_get_scanline_64 (pixman_image_t *image,
 248                                int             x,
 249                                int             y,
 250                                int             width,
 251                                uint32_t *      buffer,
 252                                const uint32_t *unused);
 253
 254 void
 255 _pixman_image_store_scanline_32 (bits_image_t *  image,
 256                                  int             x,
 257                                  int             y,
 258                                  int             width,
 259                                  const uint32_t *buffer);
 260
 261 /* Even though the type of buffer is uint32_t *, the function
 262  * actually expects a uint64_t *buffer.
 263  */
 264 void
 265 _pixman_image_store_scanline_64 (bits_image_t *  image,
 266                                  int             x,
 267                                  int             y,
 268                                  int             width,
 269                                  const uint32_t *buffer);
 270
 271 pixman_image_t *
 272 _pixman_image_allocate (void);
 273
 274 pixman_bool_t
 275 _pixman_init_gradient (gradient_t *                  gradient,
 276                        const pixman_gradient_stop_t *stops,
 277                        int                           n_stops);
 278 void
 279 _pixman_image_reset_clip_region (pixman_image_t *image);
 280
 281 void
 282 _pixman_image_validate (pixman_image_t *image);
 283
 284 uint32_t
 285 _pixman_image_get_solid (pixman_image_t *     image,
 286                          pixman_format_code_t format);
 287
 288 #define PIXMAN_IMAGE_GET_LINE(image, x, y, type, out_stride, line, mul) \
 289     do                                                                  \
 290     {                                                                   \
 291         uint32_t *__bits__;                                             \
 292         int       __stride__;                                           \
 293                                                                         \
 294         __bits__ = image->bits.bits;                                    \
 295         __stride__ = image->bits.rowstride;                             \
 296         (out_stride) =                                                  \
 297             __stride__ * (int) sizeof (uint32_t) / (int) sizeof (type); \
 298         (line) =                                                        \
 299             ((type *) __bits__) + (out_stride) * (y) + (mul) * (x);     \
 300     } while (0)
 301
 302 /*
 303  * Gradient walker
 304  */
 305 typedef struct
 306 {
 307     uint32_t                left_ag;
 308     uint32_t                left_rb;
 309     uint32_t                right_ag;
 310     uint32_t                right_rb;
 311     int32_t                 left_x;
 312     int32_t                 right_x;
 313     int32_t                 stepper;
 314
 315     pixman_gradient_stop_t *stops;
 316     int                     num_stops;
 317     unsigned int            spread;
 318
 319     int                     need_reset;
 320 } pixman_gradient_walker_t;
 321
 322 void
 323 _pixman_gradient_walker_init (pixman_gradient_walker_t *walker,
 324                               gradient_t *              gradient,
 325                               unsigned int              spread);
 326
 327 void
 328 _pixman_gradient_walker_reset (pixman_gradient_walker_t *walker,
 329                                pixman_fixed_32_32_t      pos);
 330
 331 uint32_t
 332 _pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker,
 333                                pixman_fixed_32_32_t      x);
 334
 335 /*
 336  * Edges
 337  */
 338
 339 #define MAX_ALPHA(n)    ((1 << (n)) - 1)
 340 #define N_Y_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) - 1)
 341 #define N_X_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) + 1)
 342
 343 #define STEP_Y_SMALL(n) (pixman_fixed_1 / N_Y_FRAC (n))
 344 #define STEP_Y_BIG(n)   (pixman_fixed_1 - (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 345
 346 #define Y_FRAC_FIRST(n) (STEP_Y_BIG (n) / 2)
 347 #define Y_FRAC_LAST(n)  (Y_FRAC_FIRST (n) + (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 348
 349 #define STEP_X_SMALL(n) (pixman_fixed_1 / N_X_FRAC (n))
 350 #define STEP_X_BIG(n)   (pixman_fixed_1 - (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 351
 352 #define X_FRAC_FIRST(n) (STEP_X_BIG (n) / 2)
 353 #define X_FRAC_LAST(n)  (X_FRAC_FIRST (n) + (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 354
 355 #define RENDER_SAMPLES_X(x, n)                                          \
 356     ((n) == 1? 0 : (pixman_fixed_frac (x) +                             \
 357                     X_FRAC_FIRST (n)) / STEP_X_SMALL (n))
 358
 359 void
 360 pixman_rasterize_edges_accessors (pixman_image_t *image,
 361                                   pixman_edge_t * l,
 362                                   pixman_edge_t * r,
 363                                   pixman_fixed_t  t,
 364                                   pixman_fixed_t  b);
 365
 366 /*
 367  * Implementations
 368  */
 369 typedef struct pixman_implementation_t pixman_implementation_t;
 370
 371 typedef void (*pixman_combine_32_func_t) (pixman_implementation_t *imp,
 372                                           pixman_op_t              op,
 373                                           uint32_t *               dest,
 374                                           const uint32_t *         src,
 375                                           const uint32_t *         mask,
 376                                           int                      width);
 377
 378 typedef void (*pixman_combine_64_func_t) (pixman_implementation_t *imp,
 379                                           pixman_op_t              op,
 380                                           uint64_t *               dest,
 381                                           const uint64_t *         src,
 382                                           const uint64_t *         mask,
 383                                           int                      width);
 384
 385 typedef void (*pixman_composite_func_t) (pixman_implementation_t *imp,
 386                                          pixman_op_t              op,
 387                                          pixman_image_t *         src,
 388                                          pixman_image_t *         mask,
 389                                          pixman_image_t *         dest,
 390                                          int32_t                  src_x,
 391                                          int32_t                  src_y,
 392                                          int32_t                  mask_x,
 393                                          int32_t                  mask_y,
 394                                          int32_t                  dest_x,
 395                                          int32_t                  dest_y,
 396                                          int32_t                  width,
 397                                          int32_t                  height);
 398 typedef pixman_bool_t (*pixman_blt_func_t) (pixman_implementation_t *imp,
 399                                             uint32_t *               src_bits,
 400                                             uint32_t *               dst_bits,
 401                                             int                      src_stride,
 402                                             int                      dst_stride,
 403                                             int                      src_bpp,
 404                                             int                      dst_bpp,
 405                                             int                      src_x,
 406                                             int                      src_y,
 407                                             int                      dst_x,
 408                                             int                      dst_y,
 409                                             int                      width,
 410                                             int                      height);
 411 typedef pixman_bool_t (*pixman_fill_func_t) (pixman_implementation_t *imp,
 412                                              uint32_t *               bits,
 413                                              int                      stride,
 414                                              int                      bpp,
 415                                              int                      x,
 416                                              int                      y,
 417                                              int                      width,
 418                                              int                      height,
 419                                              uint32_t                 xor);
 420
 421 void _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp);
 422 void _pixman_setup_combiner_functions_64 (pixman_implementation_t *imp);
 423
 424 typedef struct
 425 {
 426     pixman_op_t             op;
 427     pixman_format_code_t    src_format;
 428     uint32_t                src_flags;
 429     pixman_format_code_t    mask_format;
 430     uint32_t                mask_flags;
 431     pixman_format_code_t    dest_format;
 432     uint32_t                dest_flags;
 433     pixman_composite_func_t func;
 434 } pixman_fast_path_t;
 435
 436 struct pixman_implementation_t
 437 {
 438     pixman_implementation_t *   toplevel;
 439     pixman_implementation_t *   delegate;
 440     const pixman_fast_path_t *  fast_paths;
 441
 442     pixman_blt_func_t           blt;
 443     pixman_fill_func_t          fill;
 444
 445     pixman_combine_32_func_t    combine_32[PIXMAN_N_OPERATORS];
 446     pixman_combine_32_func_t    combine_32_ca[PIXMAN_N_OPERATORS];
 447     pixman_combine_64_func_t    combine_64[PIXMAN_N_OPERATORS];
 448     pixman_combine_64_func_t    combine_64_ca[PIXMAN_N_OPERATORS];
 449 };
 450
 451 pixman_implementation_t *
 452 _pixman_implementation_create (pixman_implementation_t *delegate,
 453                                const pixman_fast_path_t *fast_paths);
 454
 455 void
 456 _pixman_implementation_combine_32 (pixman_implementation_t *imp,
 457                                    pixman_op_t              op,
 458                                    uint32_t *               dest,
 459                                    const uint32_t *         src,
 460                                    const uint32_t *         mask,
 461                                    int                      width);
 462 void
 463 _pixman_implementation_combine_64 (pixman_implementation_t *imp,
 464                                    pixman_op_t              op,
 465                                    uint64_t *               dest,
 466                                    const uint64_t *         src,
 467                                    const uint64_t *         mask,
 468                                    int                      width);
 469 void
 470 _pixman_implementation_combine_32_ca (pixman_implementation_t *imp,
 471                                       pixman_op_t              op,
 472                                       uint32_t *               dest,
 473                                       const uint32_t *         src,
 474                                       const uint32_t *         mask,
 475                                       int                      width);
 476 void
 477 _pixman_implementation_combine_64_ca (pixman_implementation_t *imp,
 478                                       pixman_op_t              op,
 479                                       uint64_t *               dest,
 480                                       const uint64_t *         src,
 481                                       const uint64_t *         mask,
 482                                       int                      width);
 483
 484 pixman_bool_t
 485 _pixman_implementation_blt (pixman_implementation_t *imp,
 486                             uint32_t *               src_bits,
 487                             uint32_t *               dst_bits,
 488                             int                      src_stride,
 489                             int                      dst_stride,
 490                             int                      src_bpp,
 491                             int                      dst_bpp,
 492                             int                      src_x,
 493                             int                      src_y,
 494                             int                      dst_x,
 495                             int                      dst_y,
 496                             int                      width,
 497                             int                      height);
 498
 499 pixman_bool_t
 500 _pixman_implementation_fill (pixman_implementation_t *imp,
 501                              uint32_t *               bits,
 502                              int                      stride,
 503                              int                      bpp,
 504                              int                      x,
 505                              int                      y,
 506                              int                      width,
 507                              int                      height,
 508                              uint32_t                 xor);
 509
 510 /* Specific implementations */
 511 pixman_implementation_t *
 512 _pixman_implementation_create_general (void);
 513
 514 pixman_implementation_t *
 515 _pixman_implementation_create_fast_path (void);
 516
 517 #ifdef USE_MMX
 518 pixman_implementation_t *
 519 _pixman_implementation_create_mmx (void);
 520 #endif
 521
 522 #ifdef USE_SSE2
 523 pixman_implementation_t *
 524 _pixman_implementation_create_sse2 (void);
 525 #endif
 526
 527 #ifdef USE_ARM_SIMD
 528 pixman_implementation_t *
 529 _pixman_implementation_create_arm_simd (void);
 530 #endif
 531
 532 #ifdef USE_ARM_NEON
 533 pixman_implementation_t *
 534 _pixman_implementation_create_arm_neon (void);
 535 #endif
 536
 537 #ifdef USE_VMX
 538 pixman_implementation_t *
 539 _pixman_implementation_create_vmx (void);
 540 #endif
 541
 542 pixman_implementation_t *
 543 _pixman_choose_implementation (void);
 544
 545
 546
 547 /*
 548  * Utilities
 549  */
 550
 551 /* These "formats" all have depth 0, so they
 552  * will never clash with any real ones
 553  */
 554 #define PIXMAN_null             PIXMAN_FORMAT (0, 0, 0, 0, 0, 0)
 555 #define PIXMAN_solid            PIXMAN_FORMAT (0, 1, 0, 0, 0, 0)
 556 #define PIXMAN_pixbuf           PIXMAN_FORMAT (0, 2, 0, 0, 0, 0)
 557 #define PIXMAN_rpixbuf          PIXMAN_FORMAT (0, 3, 0, 0, 0, 0)
 558 #define PIXMAN_unknown          PIXMAN_FORMAT (0, 4, 0, 0, 0, 0)
 559 #define PIXMAN_any              PIXMAN_FORMAT (0, 5, 0, 0, 0, 0)
 560
 561 #define PIXMAN_OP_any           (PIXMAN_N_OPERATORS + 1)
 562
 563 #define FAST_PATH_ID_TRANSFORM                  (1 <<  0)
 564 #define FAST_PATH_NO_ALPHA_MAP                  (1 <<  1)
 565 #define FAST_PATH_NO_CONVOLUTION_FILTER         (1 <<  2)
 566 #define FAST_PATH_NO_PAD_REPEAT                 (1 <<  3)
 567 #define FAST_PATH_NO_REFLECT_REPEAT             (1 <<  4)
 568 #define FAST_PATH_NO_ACCESSORS                  (1 <<  5)
 569 #define FAST_PATH_NO_WIDE_FORMAT                (1 <<  6)
 570 #define FAST_PATH_COVERS_CLIP                   (1 <<  7)
 571 #define FAST_PATH_COMPONENT_ALPHA               (1 <<  8)
 572 #define FAST_PATH_UNIFIED_ALPHA                 (1 <<  9)
 573 #define FAST_PATH_SCALE_TRANSFORM               (1 << 10)
 574 #define FAST_PATH_NEAREST_FILTER                (1 << 11)
 575 #define FAST_PATH_SIMPLE_REPEAT                 (1 << 12)
 576 #define FAST_PATH_IS_OPAQUE                     (1 << 13)
 577 #define FAST_PATH_NEEDS_WORKAROUND              (1 << 14)
 578 #define FAST_PATH_NO_NONE_REPEAT                (1 << 15)
 579 #define FAST_PATH_SAMPLES_COVER_CLIP            (1 << 16)
 580 #define FAST_PATH_16BIT_SAFE                    (1 << 17)
 581 #define FAST_PATH_X_UNIT_POSITIVE               (1 << 18)
 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 CONVERT_0565_TO_8888(s) (CONVERT_0565_TO_0888(s) | 0xff000000)
 708
 709 /* Trivial versions that are useful in macros */
 710 #define CONVERT_8888_TO_8888(s) (s)
 711 #define CONVERT_0565_TO_0565(s) (s)
 712
 713 #define PIXMAN_FORMAT_IS_WIDE(f)                                        \
 714     (PIXMAN_FORMAT_A (f) > 8 ||                                         \
 715      PIXMAN_FORMAT_R (f) > 8 ||                                         \
 716      PIXMAN_FORMAT_G (f) > 8 ||                                         \
 717      PIXMAN_FORMAT_B (f) > 8)
 718
 719 #ifdef WORDS_BIGENDIAN
 720 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) << (n))
 721 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) >> (n))
 722 #else
 723 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) >> (n))
 724 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) << (n))
 725 #endif
 726
 727 /*
 728  * Various debugging code
 729  */
 730
 731 #undef DEBUG
 732
 733 /* Turn on debugging depending on what type of release this is
 734  */
 735 #if (((PIXMAN_VERSION_MICRO % 2) == 0) && ((PIXMAN_VERSION_MINOR % 2) == 1))
 736
 737 /* Debugging gets turned on for development releases because these
 738  * are the things that end up in bleeding edge distributions such
 739  * as Rawhide etc.
 740  *
 741  * For performance reasons we don't turn it on for stable releases or
 742  * random git checkouts. (Random git checkouts are often used for
 743  * performance work).
 744  */
 745
 746 #    define DEBUG
 747
 748 #endif
 749
 750 #ifdef DEBUG
 751
 752 void
 753 _pixman_log_error (const char *function, const char *message);
 754
 755 #define return_if_fail(expr)                                            \
 756     do                                                                  \
 757     {                                                                   \
 758         if (!(expr))                                                    \
 759         {                                                               \
 760             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 761             return;                                                     \
 762         }                                                               \
 763     }                                                                   \
 764     while (0)
 765
 766 #define return_val_if_fail(expr, retval)                                \
 767     do                                                                  \
 768     {                                                                   \
 769         if (!(expr))                                                    \
 770         {                                                               \
 771             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 772             return (retval);                                            \
 773         }                                                               \
 774     }                                                                   \
 775     while (0)
 776
 777 #define critical_if_fail(expr)                                          \
 778     do                                                                  \
 779     {                                                                   \
 780         if (!(expr))                                                    \
 781             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 782     }                                                                   \
 783     while (0)
 784
 785
 786 #else
 787
 788 #define _pixman_log_error(f,m) do { } while (0)                         \
 789
 790 #define return_if_fail(expr)                                            \
 791     do                                                                  \
 792     {                                                                   \
 793         if (!(expr))                                                    \
 794             return;                                                     \
 795     }                                                                   \
 796     while (0)
 797
 798 #define return_val_if_fail(expr, retval)                                \
 799     do                                                                  \
 800     {                                                                   \
 801         if (!(expr))                                                    \
 802             return (retval);                                            \
 803     }                                                                   \
 804     while (0)
 805
 806 #define critical_if_fail(expr)                                          \
 807     do                                                                  \
 808     {                                                                   \
 809     }                                                                   \
 810     while (0)
 811 #endif
 812
 813 /*
 814  * Timers
 815  */
 816
 817 #ifdef PIXMAN_TIMERS
 818
 819 static inline uint64_t
 820 oil_profile_stamp_rdtsc (void)
 821 {
 822     uint64_t ts;
 823
 824     __asm__ __volatile__ ("rdtsc\n" : "=A" (ts));
 825     return ts;
 826 }
 827
 828 #define OIL_STAMP oil_profile_stamp_rdtsc
 829
 830 typedef struct pixman_timer_t pixman_timer_t;
 831
 832 struct pixman_timer_t
 833 {
 834     int             initialized;
 835     const char *    name;
 836     uint64_t        n_times;
 837     uint64_t        total;
 838     pixman_timer_t *next;
 839 };
 840
 841 extern int timer_defined;
 842
 843 void pixman_timer_register (pixman_timer_t *timer);
 844
 845 #define TIMER_BEGIN(tname)                                              \
 846     {                                                                   \
 847         static pixman_timer_t timer ## tname;                           \
 848         uint64_t              begin ## tname;                           \
 849                                                                         \
 850         if (!timer ## tname.initialized)                                \
 851         {                                                               \
 852             timer ## tname.initialized = 1;                             \
 853             timer ## tname.name = # tname;                              \
 854             pixman_timer_register (&timer ## tname);                    \
 855         }                                                               \
 856                                                                         \
 857         timer ## tname.n_times++;                                       \
 858         begin ## tname = OIL_STAMP ();
 859
 860 #define TIMER_END(tname)                                                \
 861     timer ## tname.total += OIL_STAMP () - begin ## tname;              \
 862     }
 863
 864 #endif /* PIXMAN_TIMERS */
 865
 866 #endif /* PIXMAN_PRIVATE_H */