pixman/pixman-private.h

   1 #ifndef PACKAGE
   2 #  error config.h must be included before pixman-private.h
   3 #endif
   4
   5 #ifndef PIXMAN_PRIVATE_H
   6 #define PIXMAN_PRIVATE_H
   7
   8 #define PIXMAN_DISABLE_DEPRECATED
   9 #define PIXMAN_USE_INTERNAL_API
  10
  11 #include "pixman.h"
  12 #include <time.h>
  13 #include <assert.h>
  14 #include <stdio.h>
  15 #include <string.h>
  16
  17 #include "pixman-compiler.h"
  18
  19 /*
  20  * Images
  21  */
  22 typedef struct image_common image_common_t;
  23 typedef struct solid_fill solid_fill_t;
  24 typedef struct gradient gradient_t;
  25 typedef struct linear_gradient linear_gradient_t;
  26 typedef struct horizontal_gradient horizontal_gradient_t;
  27 typedef struct vertical_gradient vertical_gradient_t;
  28 typedef struct conical_gradient conical_gradient_t;
  29 typedef struct radial_gradient radial_gradient_t;
  30 typedef struct bits_image bits_image_t;
  31 typedef struct circle circle_t;
  32
  33 typedef void (*fetch_scanline_t) (pixman_image_t *image,
  34                                   int             x,
  35                                   int             y,
  36                                   int             width,
  37                                   uint32_t       *buffer,
  38                                   const uint32_t *mask);
  39
  40 typedef uint32_t (*fetch_pixel_32_t) (bits_image_t *image,
  41                                       int           x,
  42                                       int           y);
  43
  44 typedef uint64_t (*fetch_pixel_64_t) (bits_image_t *image,
  45                                       int           x,
  46                                       int           y);
  47
  48 typedef void (*store_scanline_t) (bits_image_t *  image,
  49                                   int             x,
  50                                   int             y,
  51                                   int             width,
  52                                   const uint32_t *values);
  53
  54 typedef enum
  55 {
  56     BITS,
  57     LINEAR,
  58     CONICAL,
  59     RADIAL,
  60     SOLID
  61 } image_type_t;
  62
  63 typedef void (*property_changed_func_t) (pixman_image_t *image);
  64
  65 struct image_common
  66 {
  67     image_type_t                type;
  68     int32_t                     ref_count;
  69     pixman_region32_t           clip_region;
  70     int32_t                     alpha_count;        /* How many times this image is being used as an alpha map */
  71     pixman_bool_t               have_clip_region;   /* FALSE if there is no clip */
  72     pixman_bool_t               client_clip;        /* Whether the source clip was
  73                                                        set by a client */
  74     pixman_bool_t               clip_sources;       /* Whether the clip applies when
  75                                                      * the image is used as a source
  76                                                      */
  77     pixman_bool_t               dirty;
  78     pixman_transform_t *        transform;
  79     pixman_repeat_t             repeat;
  80     pixman_filter_t             filter;
  81     pixman_fixed_t *            filter_params;
  82     int                         n_filter_params;
  83     bits_image_t *              alpha_map;
  84     int                         alpha_origin_x;
  85     int                         alpha_origin_y;
  86     pixman_bool_t               component_alpha;
  87     property_changed_func_t     property_changed;
  88
  89     pixman_image_destroy_func_t destroy_func;
  90     void *                      destroy_data;
  91
  92     uint32_t                    flags;
  93     pixman_format_code_t        extended_format_code;
  94 };
  95
  96 struct solid_fill
  97 {
  98     image_common_t common;
  99     pixman_color_t color;
 100
 101     uint32_t       color_32;
 102     uint64_t       color_64;
 103 };
 104
 105 struct gradient
 106 {
 107     image_common_t          common;
 108     int                     n_stops;
 109     pixman_gradient_stop_t *stops;
 110 };
 111
 112 struct linear_gradient
 113 {
 114     gradient_t           common;
 115     pixman_point_fixed_t p1;
 116     pixman_point_fixed_t p2;
 117 };
 118
 119 struct circle
 120 {
 121     pixman_fixed_t x;
 122     pixman_fixed_t y;
 123     pixman_fixed_t radius;
 124 };
 125
 126 struct radial_gradient
 127 {
 128     gradient_t common;
 129
 130     circle_t   c1;
 131     circle_t   c2;
 132
 133     circle_t   delta;
 134     double     a;
 135     double     inva;
 136     double     mindr;
 137 };
 138
 139 struct conical_gradient
 140 {
 141     gradient_t           common;
 142     pixman_point_fixed_t center;
 143     double               angle;
 144 };
 145
 146 struct bits_image
 147 {
 148     image_common_t             common;
 149     pixman_format_code_t       format;
 150     const pixman_indexed_t *   indexed;
 151     int                        width;
 152     int                        height;
 153     uint32_t *                 bits;
 154     uint32_t *                 free_me;
 155     int                        rowstride;  /* in number of uint32_t's */
 156
 157     fetch_scanline_t           get_scanline_32;
 158     fetch_scanline_t           get_scanline_64;
 159
 160     fetch_scanline_t           fetch_scanline_32;
 161     fetch_pixel_32_t           fetch_pixel_32;
 162     store_scanline_t           store_scanline_32;
 163
 164     fetch_scanline_t           fetch_scanline_64;
 165     fetch_pixel_64_t           fetch_pixel_64;
 166     store_scanline_t           store_scanline_64;
 167
 168     /* Used for indirect access to the bits */
 169     pixman_read_memory_func_t  read_func;
 170     pixman_write_memory_func_t write_func;
 171 };
 172
 173 union pixman_image
 174 {
 175     image_type_t       type;
 176     image_common_t     common;
 177     bits_image_t       bits;
 178     gradient_t         gradient;
 179     linear_gradient_t  linear;
 180     conical_gradient_t conical;
 181     radial_gradient_t  radial;
 182     solid_fill_t       solid;
 183 };
 184
 185 typedef struct pixman_iter_t pixman_iter_t;
 186 typedef uint32_t *(* pixman_iter_get_scanline_t) (pixman_iter_t *iter, const uint32_t *mask);
 187 typedef void      (* pixman_iter_write_back_t)   (pixman_iter_t *iter);
 188
 189 typedef enum
 190 {
 191     ITER_NARROW =               (1 << 0),
 192
 193     /* "Localized alpha" is when the alpha channel is used only to compute
 194      * the alpha value of the destination. This means that the computation
 195      * of the RGB values of the result is independent of the alpha value.
 196      *
 197      * For example, the OVER operator has localized alpha for the
 198      * destination, because the RGB values of the result can be computed
 199      * without knowing the destination alpha. Similarly, ADD has localized
 200      * alpha for both source and destination because the RGB values of the
 201      * result can be computed without knowing the alpha value of source or
 202      * destination.
 203      *
 204      * When he destination is xRGB, this is useful knowledge, because then
 205      * we can treat it as if it were ARGB, which means in some cases we can
 206      * avoid copying it to a temporary buffer.
 207      */
 208     ITER_LOCALIZED_ALPHA =      (1 << 1),
 209     ITER_IGNORE_ALPHA =         (1 << 2),
 210     ITER_IGNORE_RGB =           (1 << 3)
 211 } iter_flags_t;
 212
 213 struct pixman_iter_t
 214 {
 215     /* These are initialized by _pixman_implementation_{src,dest}_init */
 216     pixman_image_t *            image;
 217     uint32_t *                  buffer;
 218     int                         x, y;
 219     int                         width;
 220     int                         height;
 221     iter_flags_t                flags;
 222
 223     /* These function pointers are initialized by the implementation */
 224     pixman_iter_get_scanline_t  get_scanline;
 225     pixman_iter_write_back_t    write_back;
 226
 227     /* These fields are scratch data that implementations can use */
 228     uint8_t *                   bits;
 229     int                         stride;
 230 };
 231
 232 void
 233 _pixman_bits_image_setup_accessors (bits_image_t *image);
 234
 235 void
 236 _pixman_bits_image_src_iter_init (pixman_image_t *image, pixman_iter_t *iter);
 237
 238 void
 239 _pixman_bits_image_dest_iter_init (pixman_image_t *image, pixman_iter_t *iter);
 240
 241 void
 242 _pixman_solid_fill_iter_init (pixman_image_t *image, pixman_iter_t  *iter);
 243
 244 void
 245 _pixman_linear_gradient_iter_init (pixman_image_t *image, pixman_iter_t  *iter);
 246
 247 void
 248 _pixman_radial_gradient_iter_init (pixman_image_t *image, pixman_iter_t *iter);
 249
 250 void
 251 _pixman_conical_gradient_iter_init (pixman_image_t *image, pixman_iter_t *iter);
 252
 253 pixman_image_t *
 254 _pixman_image_allocate (void);
 255
 256 pixman_bool_t
 257 _pixman_init_gradient (gradient_t *                  gradient,
 258                        const pixman_gradient_stop_t *stops,
 259                        int                           n_stops);
 260 void
 261 _pixman_image_reset_clip_region (pixman_image_t *image);
 262
 263 void
 264 _pixman_image_validate (pixman_image_t *image);
 265
 266 #define PIXMAN_IMAGE_GET_LINE(image, x, y, type, out_stride, line, mul) \
 267     do                                                                  \
 268     {                                                                   \
 269         uint32_t *__bits__;                                             \
 270         int       __stride__;                                           \
 271                                                                         \
 272         __bits__ = image->bits.bits;                                    \
 273         __stride__ = image->bits.rowstride;                             \
 274         (out_stride) =                                                  \
 275             __stride__ * (int) sizeof (uint32_t) / (int) sizeof (type); \
 276         (line) =                                                        \
 277             ((type *) __bits__) + (out_stride) * (y) + (mul) * (x);     \
 278     } while (0)
 279
 280 /*
 281  * Gradient walker
 282  */
 283 typedef struct
 284 {
 285     uint32_t                left_ag;
 286     uint32_t                left_rb;
 287     uint32_t                right_ag;
 288     uint32_t                right_rb;
 289     int32_t                 left_x;
 290     int32_t                 right_x;
 291     int32_t                 stepper;
 292
 293     pixman_gradient_stop_t *stops;
 294     int                     num_stops;
 295     unsigned int            spread;
 296
 297     int                     need_reset;
 298 } pixman_gradient_walker_t;
 299
 300 void
 301 _pixman_gradient_walker_init (pixman_gradient_walker_t *walker,
 302                               gradient_t *              gradient,
 303                               unsigned int              spread);
 304
 305 void
 306 _pixman_gradient_walker_reset (pixman_gradient_walker_t *walker,
 307                                pixman_fixed_32_32_t      pos);
 308
 309 uint32_t
 310 _pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker,
 311                                pixman_fixed_32_32_t      x);
 312
 313 /*
 314  * Edges
 315  */
 316
 317 #define MAX_ALPHA(n)    ((1 << (n)) - 1)
 318 #define N_Y_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) - 1)
 319 #define N_X_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n) / 2)) + 1)
 320
 321 #define STEP_Y_SMALL(n) (pixman_fixed_1 / N_Y_FRAC (n))
 322 #define STEP_Y_BIG(n)   (pixman_fixed_1 - (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 323
 324 #define Y_FRAC_FIRST(n) (STEP_Y_BIG (n) / 2)
 325 #define Y_FRAC_LAST(n)  (Y_FRAC_FIRST (n) + (N_Y_FRAC (n) - 1) * STEP_Y_SMALL (n))
 326
 327 #define STEP_X_SMALL(n) (pixman_fixed_1 / N_X_FRAC (n))
 328 #define STEP_X_BIG(n)   (pixman_fixed_1 - (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 329
 330 #define X_FRAC_FIRST(n) (STEP_X_BIG (n) / 2)
 331 #define X_FRAC_LAST(n)  (X_FRAC_FIRST (n) + (N_X_FRAC (n) - 1) * STEP_X_SMALL (n))
 332
 333 #define RENDER_SAMPLES_X(x, n)                                          \
 334     ((n) == 1? 0 : (pixman_fixed_frac (x) +                             \
 335                     X_FRAC_FIRST (n)) / STEP_X_SMALL (n))
 336
 337 void
 338 pixman_rasterize_edges_accessors (pixman_image_t *image,
 339                                   pixman_edge_t * l,
 340                                   pixman_edge_t * r,
 341                                   pixman_fixed_t  t,
 342                                   pixman_fixed_t  b);
 343
 344 /*
 345  * Implementations
 346  */
 347 typedef struct pixman_implementation_t pixman_implementation_t;
 348
 349 typedef struct
 350 {
 351     pixman_op_t              op;
 352     pixman_image_t *         src_image;
 353     pixman_image_t *         mask_image;
 354     pixman_image_t *         dest_image;
 355     int32_t                  src_x;
 356     int32_t                  src_y;
 357     int32_t                  mask_x;
 358     int32_t                  mask_y;
 359     int32_t                  dest_x;
 360     int32_t                  dest_y;
 361     int32_t                  width;
 362     int32_t                  height;
 363 } pixman_composite_info_t;
 364
 365 #define PIXMAN_COMPOSITE_ARGS(info)                                     \
 366     MAYBE_UNUSED pixman_op_t        op = info->op;                      \
 367     MAYBE_UNUSED pixman_image_t *   src_image = info->src_image;        \
 368     MAYBE_UNUSED pixman_image_t *   mask_image = info->mask_image;      \
 369     MAYBE_UNUSED pixman_image_t *   dest_image = info->dest_image;      \
 370     MAYBE_UNUSED int32_t            src_x = info->src_x;                \
 371     MAYBE_UNUSED int32_t            src_y = info->src_y;                \
 372     MAYBE_UNUSED int32_t            mask_x = info->mask_x;              \
 373     MAYBE_UNUSED int32_t            mask_y = info->mask_y;              \
 374     MAYBE_UNUSED int32_t            dest_x = info->dest_x;              \
 375     MAYBE_UNUSED int32_t            dest_y = info->dest_y;              \
 376     MAYBE_UNUSED int32_t            width = info->width;                \
 377     MAYBE_UNUSED int32_t            height = info->height
 378
 379 typedef void (*pixman_combine_32_func_t) (pixman_implementation_t *imp,
 380                                           pixman_op_t              op,
 381                                           uint32_t *               dest,
 382                                           const uint32_t *         src,
 383                                           const uint32_t *         mask,
 384                                           int                      width);
 385
 386 typedef void (*pixman_combine_64_func_t) (pixman_implementation_t *imp,
 387                                           pixman_op_t              op,
 388                                           uint64_t *               dest,
 389                                           const uint64_t *         src,
 390                                           const uint64_t *         mask,
 391                                           int                      width);
 392
 393 typedef void (*pixman_composite_func_t) (pixman_implementation_t *imp,
 394                                          pixman_composite_info_t *info);
 395 typedef pixman_bool_t (*pixman_blt_func_t) (pixman_implementation_t *imp,
 396                                             uint32_t *               src_bits,
 397                                             uint32_t *               dst_bits,
 398                                             int                      src_stride,
 399                                             int                      dst_stride,
 400                                             int                      src_bpp,
 401                                             int                      dst_bpp,
 402                                             int                      src_x,
 403                                             int                      src_y,
 404                                             int                      dest_x,
 405                                             int                      dest_y,
 406                                             int                      width,
 407                                             int                      height);
 408 typedef pixman_bool_t (*pixman_fill_func_t) (pixman_implementation_t *imp,
 409                                              uint32_t *               bits,
 410                                              int                      stride,
 411                                              int                      bpp,
 412                                              int                      x,
 413                                              int                      y,
 414                                              int                      width,
 415                                              int                      height,
 416                                              uint32_t                 xor);
 417 typedef void (*pixman_iter_init_func_t) (pixman_implementation_t *imp,
 418                                          pixman_iter_t           *iter);
 419
 420 void _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp);
 421 void _pixman_setup_combiner_functions_64 (pixman_implementation_t *imp);
 422
 423 typedef struct
 424 {
 425     pixman_op_t             op;
 426     pixman_format_code_t    src_format;
 427     uint32_t                src_flags;
 428     pixman_format_code_t    mask_format;
 429     uint32_t                mask_flags;
 430     pixman_format_code_t    dest_format;
 431     uint32_t                dest_flags;
 432     pixman_composite_func_t func;
 433 } pixman_fast_path_t;
 434
 435 struct pixman_implementation_t
 436 {
 437     pixman_implementation_t *   toplevel;
 438     pixman_implementation_t *   delegate;
 439     const pixman_fast_path_t *  fast_paths;
 440
 441     pixman_blt_func_t           blt;
 442     pixman_fill_func_t          fill;
 443     pixman_iter_init_func_t     src_iter_init;
 444     pixman_iter_init_func_t     dest_iter_init;
 445
 446     pixman_combine_32_func_t    combine_32[PIXMAN_N_OPERATORS];
 447     pixman_combine_32_func_t    combine_32_ca[PIXMAN_N_OPERATORS];
 448     pixman_combine_64_func_t    combine_64[PIXMAN_N_OPERATORS];
 449     pixman_combine_64_func_t    combine_64_ca[PIXMAN_N_OPERATORS];
 450 };
 451
 452 uint32_t
 453 _pixman_image_get_solid (pixman_implementation_t *imp,
 454                          pixman_image_t *         image,
 455                          pixman_format_code_t     format);
 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                      dest_x,
 501                             int                      dest_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 void
 517 _pixman_implementation_src_iter_init (pixman_implementation_t       *imp,
 518                                       pixman_iter_t                 *iter,
 519                                       pixman_image_t                *image,
 520                                       int                            x,
 521                                       int                            y,
 522                                       int                            width,
 523                                       int                            height,
 524                                       uint8_t                       *buffer,
 525                                       iter_flags_t                   flags);
 526
 527 void
 528 _pixman_implementation_dest_iter_init (pixman_implementation_t       *imp,
 529                                        pixman_iter_t                 *iter,
 530                                        pixman_image_t                *image,
 531                                        int                            x,
 532                                        int                            y,
 533                                        int                            width,
 534                                        int                            height,
 535                                        uint8_t                       *buffer,
 536                                        iter_flags_t                   flags);
 537
 538 /* Specific implementations */
 539 pixman_implementation_t *
 540 _pixman_implementation_create_general (void);
 541
 542 pixman_implementation_t *
 543 _pixman_implementation_create_fast_path (pixman_implementation_t *fallback);
 544
 545 pixman_implementation_t *
 546 _pixman_implementation_create_noop (pixman_implementation_t *fallback);
 547
 548 #ifdef USE_MMX
 549 pixman_implementation_t *
 550 _pixman_implementation_create_mmx (pixman_implementation_t *fallback);
 551 #endif
 552
 553 #ifdef USE_SSE2
 554 pixman_implementation_t *
 555 _pixman_implementation_create_sse2 (pixman_implementation_t *fallback);
 556 #endif
 557
 558 #ifdef USE_ARM_SIMD
 559 pixman_implementation_t *
 560 _pixman_implementation_create_arm_simd (pixman_implementation_t *fallback);
 561 #endif
 562
 563 #ifdef USE_ARM_NEON
 564 pixman_implementation_t *
 565 _pixman_implementation_create_arm_neon (pixman_implementation_t *fallback);
 566 #endif
 567
 568 #ifdef USE_VMX
 569 pixman_implementation_t *
 570 _pixman_implementation_create_vmx (pixman_implementation_t *fallback);
 571 #endif
 572
 573 pixman_implementation_t *
 574 _pixman_choose_implementation (void);
 575
 576
 577
 578 /*
 579  * Utilities
 580  */
 581 uint32_t *
 582 _pixman_iter_get_scanline_noop (pixman_iter_t *iter, const uint32_t *mask);
 583
 584 /* These "formats" all have depth 0, so they
 585  * will never clash with any real ones
 586  */
 587 #define PIXMAN_null             PIXMAN_FORMAT (0, 0, 0, 0, 0, 0)
 588 #define PIXMAN_solid            PIXMAN_FORMAT (0, 1, 0, 0, 0, 0)
 589 #define PIXMAN_pixbuf           PIXMAN_FORMAT (0, 2, 0, 0, 0, 0)
 590 #define PIXMAN_rpixbuf          PIXMAN_FORMAT (0, 3, 0, 0, 0, 0)
 591 #define PIXMAN_unknown          PIXMAN_FORMAT (0, 4, 0, 0, 0, 0)
 592 #define PIXMAN_any              PIXMAN_FORMAT (0, 5, 0, 0, 0, 0)
 593
 594 #define PIXMAN_OP_any           (PIXMAN_N_OPERATORS + 1)
 595
 596 #define FAST_PATH_ID_TRANSFORM                  (1 <<  0)
 597 #define FAST_PATH_NO_ALPHA_MAP                  (1 <<  1)
 598 #define FAST_PATH_NO_CONVOLUTION_FILTER         (1 <<  2)
 599 #define FAST_PATH_NO_PAD_REPEAT                 (1 <<  3)
 600 #define FAST_PATH_NO_REFLECT_REPEAT             (1 <<  4)
 601 #define FAST_PATH_NO_ACCESSORS                  (1 <<  5)
 602 #define FAST_PATH_NARROW_FORMAT                 (1 <<  6)
 603 #define FAST_PATH_COMPONENT_ALPHA               (1 <<  8)
 604 #define FAST_PATH_SAMPLES_OPAQUE                (1 <<  7)
 605 #define FAST_PATH_UNIFIED_ALPHA                 (1 <<  9)
 606 #define FAST_PATH_SCALE_TRANSFORM               (1 << 10)
 607 #define FAST_PATH_NEAREST_FILTER                (1 << 11)
 608 #define FAST_PATH_HAS_TRANSFORM                 (1 << 12)
 609 #define FAST_PATH_IS_OPAQUE                     (1 << 13)
 610 #define FAST_PATH_NO_NORMAL_REPEAT              (1 << 14)
 611 #define FAST_PATH_NO_NONE_REPEAT                (1 << 15)
 612 #define FAST_PATH_X_UNIT_POSITIVE               (1 << 16)
 613 #define FAST_PATH_AFFINE_TRANSFORM              (1 << 17)
 614 #define FAST_PATH_Y_UNIT_ZERO                   (1 << 18)
 615 #define FAST_PATH_BILINEAR_FILTER               (1 << 19)
 616 #define FAST_PATH_ROTATE_90_TRANSFORM           (1 << 20)
 617 #define FAST_PATH_ROTATE_180_TRANSFORM          (1 << 21)
 618 #define FAST_PATH_ROTATE_270_TRANSFORM          (1 << 22)
 619 #define FAST_PATH_SAMPLES_COVER_CLIP_NEAREST    (1 << 23)
 620 #define FAST_PATH_SAMPLES_COVER_CLIP_BILINEAR   (1 << 24)
 621
 622 #define FAST_PATH_PAD_REPEAT                                            \
 623     (FAST_PATH_NO_NONE_REPEAT           |                               \
 624      FAST_PATH_NO_NORMAL_REPEAT         |                               \
 625      FAST_PATH_NO_REFLECT_REPEAT)
 626
 627 #define FAST_PATH_NORMAL_REPEAT                                         \
 628     (FAST_PATH_NO_NONE_REPEAT           |                               \
 629      FAST_PATH_NO_PAD_REPEAT            |                               \
 630      FAST_PATH_NO_REFLECT_REPEAT)
 631
 632 #define FAST_PATH_NONE_REPEAT                                           \
 633     (FAST_PATH_NO_NORMAL_REPEAT         |                               \
 634      FAST_PATH_NO_PAD_REPEAT            |                               \
 635      FAST_PATH_NO_REFLECT_REPEAT)
 636
 637 #define FAST_PATH_REFLECT_REPEAT                                        \
 638     (FAST_PATH_NO_NONE_REPEAT           |                               \
 639      FAST_PATH_NO_NORMAL_REPEAT         |                               \
 640      FAST_PATH_NO_PAD_REPEAT)
 641
 642 #define FAST_PATH_STANDARD_FLAGS                                        \
 643     (FAST_PATH_NO_CONVOLUTION_FILTER    |                               \
 644      FAST_PATH_NO_ACCESSORS             |                               \
 645      FAST_PATH_NO_ALPHA_MAP             |                               \
 646      FAST_PATH_NARROW_FORMAT)
 647
 648 #define FAST_PATH_STD_DEST_FLAGS                                        \
 649     (FAST_PATH_NO_ACCESSORS             |                               \
 650      FAST_PATH_NO_ALPHA_MAP             |                               \
 651      FAST_PATH_NARROW_FORMAT)
 652
 653 #define SOURCE_FLAGS(format)                                            \
 654     (FAST_PATH_STANDARD_FLAGS |                                         \
 655      ((PIXMAN_ ## format == PIXMAN_solid) ?                             \
 656       0 : (FAST_PATH_SAMPLES_COVER_CLIP_NEAREST | FAST_PATH_NEAREST_FILTER | FAST_PATH_ID_TRANSFORM)))
 657
 658 #define MASK_FLAGS(format, extra)                                       \
 659     ((PIXMAN_ ## format == PIXMAN_null) ? 0 : (SOURCE_FLAGS (format) | extra))
 660
 661 #define FAST_PATH(op, src, src_flags, mask, mask_flags, dest, dest_flags, func) \
 662     PIXMAN_OP_ ## op,                                                   \
 663     PIXMAN_ ## src,                                                     \
 664     src_flags,                                                          \
 665     PIXMAN_ ## mask,                                                    \
 666     mask_flags,                                                         \
 667     PIXMAN_ ## dest,                                                    \
 668     dest_flags,                                                         \
 669     func
 670
 671 #define PIXMAN_STD_FAST_PATH(op, src, mask, dest, func)                 \
 672     { FAST_PATH (                                                       \
 673             op,                                                         \
 674             src,  SOURCE_FLAGS (src),                                   \
 675             mask, MASK_FLAGS (mask, FAST_PATH_UNIFIED_ALPHA),           \
 676             dest, FAST_PATH_STD_DEST_FLAGS,                             \
 677             func) }
 678
 679 #define PIXMAN_STD_FAST_PATH_CA(op, src, mask, dest, func)              \
 680     { FAST_PATH (                                                       \
 681             op,                                                         \
 682             src,  SOURCE_FLAGS (src),                                   \
 683             mask, MASK_FLAGS (mask, FAST_PATH_COMPONENT_ALPHA),         \
 684             dest, FAST_PATH_STD_DEST_FLAGS,                             \
 685             func) }
 686
 687 /* Memory allocation helpers */
 688 void *
 689 pixman_malloc_ab (unsigned int n, unsigned int b);
 690
 691 void *
 692 pixman_malloc_abc (unsigned int a, unsigned int b, unsigned int c);
 693
 694 pixman_bool_t
 695 _pixman_multiply_overflows_size (size_t a, size_t b);
 696
 697 pixman_bool_t
 698 _pixman_multiply_overflows_int (unsigned int a, unsigned int b);
 699
 700 pixman_bool_t
 701 _pixman_addition_overflows_int (unsigned int a, unsigned int b);
 702
 703 /* Compositing utilities */
 704 void
 705 pixman_expand (uint64_t *           dst,
 706                const uint32_t *     src,
 707                pixman_format_code_t format,
 708                int                  width);
 709
 710 void
 711 pixman_contract (uint32_t *      dst,
 712                  const uint64_t *src,
 713                  int             width);
 714
 715
 716 /* Region Helpers */
 717 pixman_bool_t
 718 pixman_region32_copy_from_region16 (pixman_region32_t *dst,
 719                                     pixman_region16_t *src);
 720
 721 pixman_bool_t
 722 pixman_region16_copy_from_region32 (pixman_region16_t *dst,
 723                                     pixman_region32_t *src);
 724
 725
 726 /* Misc macros */
 727
 728 #ifndef FALSE
 729 #   define FALSE 0
 730 #endif
 731
 732 #ifndef TRUE
 733 #   define TRUE 1
 734 #endif
 735
 736 #ifndef MIN
 737 #  define MIN(a, b) ((a < b) ? a : b)
 738 #endif
 739
 740 #ifndef MAX
 741 #  define MAX(a, b) ((a > b) ? a : b)
 742 #endif
 743
 744 /* Integer division that rounds towards -infinity */
 745 #define DIV(a, b)                                          \
 746     ((((a) < 0) == ((b) < 0)) ? (a) / (b) :                \
 747      ((a) - (b) + 1 - (((b) < 0) << 1)) / (b))
 748
 749 /* Modulus that produces the remainder wrt. DIV */
 750 #define MOD(a, b) ((a) < 0 ? ((b) - ((-(a) - 1) % (b))) - 1 : (a) % (b))
 751
 752 #define CLIP(v, low, high) ((v) < (low) ? (low) : ((v) > (high) ? (high) : (v)))
 753
 754 /* Conversion between 8888 and 0565 */
 755
 756 #define CONVERT_8888_TO_0565(s)                                         \
 757     ((((s) >> 3) & 0x001f) |                                            \
 758      (((s) >> 5) & 0x07e0) |                                            \
 759      (((s) >> 8) & 0xf800))
 760
 761 #define CONVERT_0565_TO_0888(s)                                         \
 762     (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) |                       \
 763      ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) |                   \
 764      ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)))
 765
 766 #define CONVERT_0565_TO_8888(s) (CONVERT_0565_TO_0888(s) | 0xff000000)
 767
 768 /* Trivial versions that are useful in macros */
 769 #define CONVERT_8888_TO_8888(s) (s)
 770 #define CONVERT_x888_TO_8888(s) ((s) | 0xff000000)
 771 #define CONVERT_0565_TO_0565(s) (s)
 772
 773 #define PIXMAN_FORMAT_IS_WIDE(f)                                        \
 774     (PIXMAN_FORMAT_A (f) > 8 ||                                         \
 775      PIXMAN_FORMAT_R (f) > 8 ||                                         \
 776      PIXMAN_FORMAT_G (f) > 8 ||                                         \
 777      PIXMAN_FORMAT_B (f) > 8)
 778
 779 #ifdef WORDS_BIGENDIAN
 780 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) << (n))
 781 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) >> (n))
 782 #else
 783 #   define SCREEN_SHIFT_LEFT(x,n)       ((x) >> (n))
 784 #   define SCREEN_SHIFT_RIGHT(x,n)      ((x) << (n))
 785 #endif
 786
 787 static force_inline uint32_t
 788 unorm_to_unorm (uint32_t val, int from_bits, int to_bits)
 789 {
 790     uint32_t result;
 791
 792     if (from_bits == 0)
 793         return 0;
 794
 795     /* Delete any extra bits */
 796     val &= ((1 << from_bits) - 1);
 797
 798     if (from_bits >= to_bits)
 799         return val >> (from_bits - to_bits);
 800
 801     /* Start out with the high bit of val in the high bit of result. */
 802     result = val << (to_bits - from_bits);
 803
 804     /* Copy the bits in result, doubling the number of bits each time, until
 805      * we fill all to_bits. Unrolled manually because from_bits and to_bits
 806      * are usually known statically, so the compiler can turn all of this
 807      * into a few shifts.
 808      */
 809 #define REPLICATE()                                                     \
 810     do                                                                  \
 811     {                                                                   \
 812         if (from_bits < to_bits)                                        \
 813         {                                                               \
 814             result |= result >> from_bits;                              \
 815                                                                         \
 816             from_bits *= 2;                                             \
 817         }                                                               \
 818     }                                                                   \
 819     while (0)
 820
 821     REPLICATE();
 822     REPLICATE();
 823     REPLICATE();
 824     REPLICATE();
 825     REPLICATE();
 826
 827     return result;
 828 }
 829
 830 /*
 831  * Various debugging code
 832  */
 833
 834 #undef DEBUG
 835
 836 #define COMPILE_TIME_ASSERT(x)                                          \
 837     do { typedef int compile_time_assertion [(x)?1:-1]; } while (0)
 838
 839 /* Turn on debugging depending on what type of release this is
 840  */
 841 #if (((PIXMAN_VERSION_MICRO % 2) == 0) && ((PIXMAN_VERSION_MINOR % 2) == 1))
 842
 843 /* Debugging gets turned on for development releases because these
 844  * are the things that end up in bleeding edge distributions such
 845  * as Rawhide etc.
 846  *
 847  * For performance reasons we don't turn it on for stable releases or
 848  * random git checkouts. (Random git checkouts are often used for
 849  * performance work).
 850  */
 851
 852 #    define DEBUG
 853
 854 #endif
 855
 856 #ifdef DEBUG
 857
 858 void
 859 _pixman_log_error (const char *function, const char *message);
 860
 861 #define return_if_fail(expr)                                            \
 862     do                                                                  \
 863     {                                                                   \
 864         if (!(expr))                                                    \
 865         {                                                               \
 866             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 867             return;                                                     \
 868         }                                                               \
 869     }                                                                   \
 870     while (0)
 871
 872 #define return_val_if_fail(expr, retval)                                \
 873     do                                                                  \
 874     {                                                                   \
 875         if (!(expr))                                                    \
 876         {                                                               \
 877             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 878             return (retval);                                            \
 879         }                                                               \
 880     }                                                                   \
 881     while (0)
 882
 883 #define critical_if_fail(expr)                                          \
 884     do                                                                  \
 885     {                                                                   \
 886         if (!(expr))                                                    \
 887             _pixman_log_error (FUNC, "The expression " # expr " was false"); \
 888     }                                                                   \
 889     while (0)
 890
 891
 892 #else
 893
 894 #define _pixman_log_error(f,m) do { } while (0)                         \
 895
 896 #define return_if_fail(expr)                                            \
 897     do                                                                  \
 898     {                                                                   \
 899         if (!(expr))                                                    \
 900             return;                                                     \
 901     }                                                                   \
 902     while (0)
 903
 904 #define return_val_if_fail(expr, retval)                                \
 905     do                                                                  \
 906     {                                                                   \
 907         if (!(expr))                                                    \
 908             return (retval);                                            \
 909     }                                                                   \
 910     while (0)
 911
 912 #define critical_if_fail(expr)                                          \
 913     do                                                                  \
 914     {                                                                   \
 915     }                                                                   \
 916     while (0)
 917 #endif
 918
 919 /*
 920  * Timers
 921  */
 922
 923 #ifdef PIXMAN_TIMERS
 924
 925 static inline uint64_t
 926 oil_profile_stamp_rdtsc (void)
 927 {
 928     uint64_t ts;
 929
 930     __asm__ __volatile__ ("rdtsc\n" : "=A" (ts));
 931     return ts;
 932 }
 933
 934 #define OIL_STAMP oil_profile_stamp_rdtsc
 935
 936 typedef struct pixman_timer_t pixman_timer_t;
 937
 938 struct pixman_timer_t
 939 {
 940     int             initialized;
 941     const char *    name;
 942     uint64_t        n_times;
 943     uint64_t        total;
 944     pixman_timer_t *next;
 945 };
 946
 947 extern int timer_defined;
 948
 949 void pixman_timer_register (pixman_timer_t *timer);
 950
 951 #define TIMER_BEGIN(tname)                                              \
 952     {                                                                   \
 953         static pixman_timer_t timer ## tname;                           \
 954         uint64_t              begin ## tname;                           \
 955                                                                         \
 956         if (!timer ## tname.initialized)                                \
 957         {                                                               \
 958             timer ## tname.initialized = 1;                             \
 959             timer ## tname.name = # tname;                              \
 960             pixman_timer_register (&timer ## tname);                    \
 961         }                                                               \
 962                                                                         \
 963         timer ## tname.n_times++;                                       \
 964         begin ## tname = OIL_STAMP ();
 965
 966 #define TIMER_END(tname)                                                \
 967     timer ## tname.total += OIL_STAMP () - begin ## tname;              \
 968     }
 969
 970 #endif /* PIXMAN_TIMERS */
 971
 972 #endif /* PIXMAN_PRIVATE_H */