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 #include "pixman.h"
   9 #include <time.h>
  10 #include <assert.h>
  11
  12 #include "pixman-compiler.h"
  13
  14 /*
  15  * Images
  16  */
  17 typedef struct image_common image_common_t;
  18 typedef struct source_image source_image_t;
  19 typedef struct solid_fill solid_fill_t;
  20 typedef struct gradient gradient_t;
  21 typedef struct linear_gradient linear_gradient_t;
  22 typedef struct horizontal_gradient horizontal_gradient_t;
  23 typedef struct vertical_gradient vertical_gradient_t;
  24 typedef struct conical_gradient conical_gradient_t;
  25 typedef struct radial_gradient radial_gradient_t;
  26 typedef struct bits_image bits_image_t;
  27 typedef struct circle circle_t;
  28
  29 typedef void     (*fetch_scanline_t)  (pixman_image_t *pict,
  30                                        int x, int y, int width,
  31                                        uint32_t *buffer,
  32                                        const uint32_t *mask,
  33                                        uint32_t mask_bits);
  34 typedef void     (*fetch_pixels_t)    (bits_image_t *image,
  35                                        uint32_t *buffer, int n_pixels);
  36 typedef void     (*store_scanline_t)  (bits_image_t *image,
  37                                        int x, int y, int width,
  38                                        const uint32_t *values);
  39
  40 typedef enum
  41 {
  42     BITS,
  43     LINEAR,
  44     CONICAL,
  45     RADIAL,
  46     SOLID
  47 } image_type_t;
  48
  49 typedef enum
  50 {
  51     SOURCE_IMAGE_CLASS_UNKNOWN,
  52     SOURCE_IMAGE_CLASS_HORIZONTAL,
  53     SOURCE_IMAGE_CLASS_VERTICAL,
  54 } source_pict_class_t;
  55
  56 typedef source_pict_class_t (* classify_func_t) (pixman_image_t *image,
  57                                                  int             x,
  58                                                  int             y,
  59                                                  int             width,
  60                                                  int             height);
  61 typedef void (* property_changed_func_t)        (pixman_image_t *image);
  62
  63 struct image_common
  64 {
  65     image_type_t                type;
  66     int32_t                     ref_count;
  67     pixman_region32_t           clip_region;
  68     pixman_bool_t               have_clip_region;   /* FALSE if there is no clip */
  69     pixman_bool_t               client_clip;        /* Whether the source clip was
  70                                                        set by a client */
  71     pixman_bool_t               clip_sources;       /* Whether the clip applies when
  72                                                      * the image is used as a source
  73                                                      */
  74     pixman_transform_t         *transform;
  75     pixman_repeat_t             repeat;
  76     pixman_filter_t             filter;
  77     pixman_fixed_t             *filter_params;
  78     int                         n_filter_params;
  79     bits_image_t               *alpha_map;
  80     int                         alpha_origin_x;
  81     int                         alpha_origin_y;
  82     pixman_bool_t               component_alpha;
  83     pixman_read_memory_func_t   read_func;
  84     pixman_write_memory_func_t  write_func;
  85     classify_func_t             classify;
  86     property_changed_func_t     property_changed;
  87     fetch_scanline_t            get_scanline_32;
  88     fetch_scanline_t            get_scanline_64;
  89
  90     pixman_image_destroy_func_t destroy_func;
  91     void *                      destroy_data;
  92 };
  93
  94 struct source_image
  95 {
  96     image_common_t      common;
  97     source_pict_class_t class;
  98 };
  99
 100 struct solid_fill
 101 {
 102     source_image_t      common;
 103     uint32_t            color;          /* FIXME: shouldn't this be a pixman_color_t? */
 104 };
 105
 106 struct gradient
 107 {
 108     source_image_t              common;
 109     int                         n_stops;
 110     pixman_gradient_stop_t *    stops;
 111     int                         stop_range;
 112     uint32_t *                  color_table;
 113     int                         color_table_size;
 114 };
 115
 116 struct linear_gradient
 117 {
 118     gradient_t                  common;
 119     pixman_point_fixed_t        p1;
 120     pixman_point_fixed_t        p2;
 121 };
 122
 123 struct circle
 124 {
 125     pixman_fixed_t x;
 126     pixman_fixed_t y;
 127     pixman_fixed_t radius;
 128 };
 129
 130 struct radial_gradient
 131 {
 132     gradient_t  common;
 133
 134     circle_t    c1;
 135     circle_t    c2;
 136     double      cdx;
 137     double      cdy;
 138     double      dr;
 139     double      A;
 140 };
 141
 142 struct conical_gradient
 143 {
 144     gradient_t                  common;
 145     pixman_point_fixed_t        center;
 146     pixman_fixed_t              angle;
 147 };
 148
 149 struct bits_image
 150 {
 151     image_common_t              common;
 152     pixman_format_code_t        format;
 153     const pixman_indexed_t     *indexed;
 154     int                         width;
 155     int                         height;
 156     uint32_t *                  bits;
 157     uint32_t *                  free_me;
 158     int                         rowstride; /* in number of uint32_t's */
 159
 160     /* Fetch raw pixels, with no regard for transformations, alpha map etc. */
 161     fetch_pixels_t              fetch_pixels_raw_32;
 162     fetch_pixels_t              fetch_pixels_raw_64;
 163
 164     /* Fetch raw scanlines, with no regard for transformations, alpha maps etc. */
 165     fetch_scanline_t                    fetch_scanline_raw_32;
 166     fetch_scanline_t                    fetch_scanline_raw_64;
 167
 168     /* Store scanlines with no regard for alpha maps */
 169     store_scanline_t            store_scanline_raw_32;
 170     store_scanline_t            store_scanline_raw_64;
 171
 172     /* Store a scanline, taking alpha maps into account */
 173     store_scanline_t            store_scanline_32;
 174     store_scanline_t            store_scanline_64;
 175
 176     /* Used for indirect access to the bits */
 177     pixman_read_memory_func_t   read_func;
 178     pixman_write_memory_func_t  write_func;
 179 };
 180
 181 union pixman_image
 182 {
 183     image_type_t                type;
 184     image_common_t              common;
 185     bits_image_t                bits;
 186     source_image_t              source;
 187     gradient_t                  gradient;
 188     linear_gradient_t           linear;
 189     conical_gradient_t          conical;
 190     radial_gradient_t           radial;
 191     solid_fill_t                solid;
 192 };
 193
 194
 195 void
 196 _pixman_bits_image_setup_raw_accessors (bits_image_t   *image);
 197
 198 void
 199 _pixman_image_get_scanline_generic_64  (pixman_image_t *pict,
 200                                         int             x,
 201                                         int             y,
 202                                         int             width,
 203                                         uint32_t       *buffer,
 204                                         const uint32_t *mask,
 205                                         uint32_t        maskBits);
 206
 207 source_pict_class_t
 208 _pixman_image_classify (pixman_image_t *image,
 209                         int             x,
 210                         int             y,
 211                         int             width,
 212                         int             height);
 213
 214 void
 215 _pixman_image_get_scanline_32 (pixman_image_t *image, int x, int y, int width, uint32_t *buffer,
 216                                const uint32_t *mask, uint32_t mask_bits);
 217
 218 /* Even thought the type of buffer is uint32_t *, the function actually expects
 219  * a uint64_t *buffer.
 220  */
 221 void
 222 _pixman_image_get_scanline_64 (pixman_image_t *image, int x, int y, int width, uint32_t *buffer,
 223                                const uint32_t *unused, uint32_t unused2);
 224
 225 void
 226 _pixman_image_store_scanline_32 (bits_image_t *image, int x, int y, int width,
 227                                  const uint32_t *buffer);
 228 void
 229 _pixman_image_fetch_pixels (bits_image_t *image, uint32_t *buffer,
 230                             int n_pixels);
 231
 232 /* Even thought the type of buffer is uint32_t *, the function actually expects
 233  * a uint64_t *buffer.
 234  */
 235 void
 236 _pixman_image_store_scanline_64 (bits_image_t *image, int x, int y, int width,
 237                                  const uint32_t *buffer);
 238
 239 pixman_image_t *
 240 _pixman_image_allocate (void);
 241
 242 pixman_bool_t
 243 _pixman_init_gradient (gradient_t                   *gradient,
 244                        const pixman_gradient_stop_t *stops,
 245                        int                           n_stops);
 246 void
 247 _pixman_image_reset_clip_region (pixman_image_t *image);
 248
 249 pixman_bool_t
 250 _pixman_image_is_opaque(pixman_image_t *image);
 251
 252 pixman_bool_t
 253 _pixman_image_is_solid (pixman_image_t *image);
 254
 255 uint32_t
 256 _pixman_image_get_solid (pixman_image_t *image,
 257                         pixman_format_code_t format);
 258
 259 #define PIXMAN_IMAGE_GET_LINE(pict,x,y,type,out_stride,line,mul) do {   \
 260         uint32_t        *__bits__;                                      \
 261         int             __stride__;                                     \
 262                                                                         \
 263         __bits__ = pict->bits.bits;                                     \
 264         __stride__ = pict->bits.rowstride;                              \
 265         (out_stride) = __stride__ * (int) sizeof (uint32_t) / (int) sizeof (type); \
 266         (line) = ((type *) __bits__) +                                  \
 267             (out_stride) * (y) + (mul) * (x);                           \
 268     } while (0)
 269
 270 /*
 271  * Gradient walker
 272  */
 273 typedef struct
 274 {
 275     uint32_t        left_ag;
 276     uint32_t        left_rb;
 277     uint32_t        right_ag;
 278     uint32_t        right_rb;
 279     int32_t       left_x;
 280     int32_t       right_x;
 281     int32_t       stepper;
 282
 283     pixman_gradient_stop_t      *stops;
 284     int                      num_stops;
 285     unsigned int             spread;
 286
 287     int           need_reset;
 288 } pixman_gradient_walker_t;
 289
 290 void
 291 _pixman_gradient_walker_init (pixman_gradient_walker_t  *walker,
 292                               gradient_t      *gradient,
 293                               unsigned int     spread);
 294
 295 void
 296 _pixman_gradient_walker_reset (pixman_gradient_walker_t       *walker,
 297                                pixman_fixed_32_32_t  pos);
 298
 299 uint32_t
 300 _pixman_gradient_walker_pixel (pixman_gradient_walker_t       *walker,
 301                                pixman_fixed_32_32_t  x);
 302
 303 /*
 304  * Edges
 305  */
 306
 307 #define MAX_ALPHA(n)    ((1 << (n)) - 1)
 308 #define N_Y_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n)/2)) - 1)
 309 #define N_X_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n)/2)) + 1)
 310
 311 #define STEP_Y_SMALL(n) (pixman_fixed_1 / N_Y_FRAC(n))
 312 #define STEP_Y_BIG(n)   (pixman_fixed_1 - (N_Y_FRAC(n) - 1) * STEP_Y_SMALL(n))
 313
 314 #define Y_FRAC_FIRST(n) (STEP_Y_SMALL(n) / 2)
 315 #define Y_FRAC_LAST(n)  (Y_FRAC_FIRST(n) + (N_Y_FRAC(n) - 1) * STEP_Y_SMALL(n))
 316
 317 #define STEP_X_SMALL(n) (pixman_fixed_1 / N_X_FRAC(n))
 318 #define STEP_X_BIG(n)   (pixman_fixed_1 - (N_X_FRAC(n) - 1) * STEP_X_SMALL(n))
 319
 320 #define X_FRAC_FIRST(n) (STEP_X_SMALL(n) / 2)
 321 #define X_FRAC_LAST(n)  (X_FRAC_FIRST(n) + (N_X_FRAC(n) - 1) * STEP_X_SMALL(n))
 322
 323 #define RenderSamplesX(x,n)     ((n) == 1 ? 0 : (pixman_fixed_frac (x) + X_FRAC_FIRST(n)) / STEP_X_SMALL(n))
 324
 325 void
 326 pixman_rasterize_edges_accessors (pixman_image_t *image,
 327                                   pixman_edge_t *l,
 328                                   pixman_edge_t *r,
 329                                   pixman_fixed_t        t,
 330                                   pixman_fixed_t        b);
 331
 332 /*
 333  * Implementations
 334  */
 335
 336 typedef struct pixman_implementation_t pixman_implementation_t;
 337
 338 typedef void (* pixman_combine_32_func_t) (pixman_implementation_t *    imp,
 339                                            pixman_op_t                  op,
 340                                            uint32_t *                   dest,
 341                                            const uint32_t *             src,
 342                                            const uint32_t *             mask,
 343                                            int                          width);
 344
 345 typedef void (* pixman_combine_64_func_t) (pixman_implementation_t *    imp,
 346                                            pixman_op_t                  op,
 347                                            uint64_t *                   dest,
 348                                            const uint64_t *             src,
 349                                            const uint64_t *             mask,
 350                                            int                          width);
 351
 352 typedef void (* pixman_composite_func_t)  (pixman_implementation_t *    imp,
 353                                            pixman_op_t                  op,
 354                                            pixman_image_t *             src,
 355                                            pixman_image_t *             mask,
 356                                            pixman_image_t *             dest,
 357                                            int32_t                      src_x,
 358                                            int32_t                      src_y,
 359                                            int32_t                      mask_x,
 360                                            int32_t                      mask_y,
 361                                            int32_t                      dest_x,
 362                                            int32_t                      dest_y,
 363                                            int32_t                      width,
 364                                            int32_t                      height);
 365 typedef pixman_bool_t (* pixman_blt_func_t) (pixman_implementation_t *  imp,
 366                                              uint32_t *                 src_bits,
 367                                              uint32_t *                 dst_bits,
 368                                              int                        src_stride,
 369                                              int                        dst_stride,
 370                                              int                        src_bpp,
 371                                              int                        dst_bpp,
 372                                              int                        src_x,
 373                                              int                        src_y,
 374                                              int                        dst_x,
 375                                              int                        dst_y,
 376                                              int                        width,
 377                                              int                        height);
 378 typedef pixman_bool_t (* pixman_fill_func_t) (pixman_implementation_t *imp,
 379                                               uint32_t *bits,
 380                                               int stride,
 381                                               int bpp,
 382                                               int x,
 383                                               int y,
 384                                               int width,
 385                                               int height,
 386                                               uint32_t xor);
 387
 388 void _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp);
 389 void _pixman_setup_combiner_functions_64 (pixman_implementation_t *imp);
 390
 391 struct pixman_implementation_t
 392 {
 393     pixman_implementation_t *   toplevel;
 394     pixman_implementation_t *   delegate;
 395
 396     pixman_composite_func_t     composite;
 397     pixman_blt_func_t           blt;
 398     pixman_fill_func_t          fill;
 399
 400     pixman_combine_32_func_t    combine_32[PIXMAN_OP_LAST];
 401     pixman_combine_32_func_t    combine_32_ca[PIXMAN_OP_LAST];
 402     pixman_combine_64_func_t    combine_64[PIXMAN_OP_LAST];
 403     pixman_combine_64_func_t    combine_64_ca[PIXMAN_OP_LAST];
 404 };
 405
 406 pixman_implementation_t *
 407 _pixman_implementation_create (pixman_implementation_t *delegate);
 408
 409 void
 410 _pixman_implementation_combine_32 (pixman_implementation_t *    imp,
 411                                    pixman_op_t                  op,
 412                                    uint32_t *                   dest,
 413                                    const uint32_t *             src,
 414                                    const uint32_t *             mask,
 415                                    int                          width);
 416 void
 417 _pixman_implementation_combine_64 (pixman_implementation_t *    imp,
 418                                    pixman_op_t                  op,
 419                                    uint64_t *                   dest,
 420                                    const uint64_t *             src,
 421                                    const uint64_t *             mask,
 422                                    int                          width);
 423 void
 424 _pixman_implementation_combine_32_ca (pixman_implementation_t * imp,
 425                                       pixman_op_t               op,
 426                                       uint32_t *                dest,
 427                                       const uint32_t *          src,
 428                                       const uint32_t *          mask,
 429                                       int                       width);
 430 void
 431 _pixman_implementation_combine_64_ca (pixman_implementation_t * imp,
 432                                       pixman_op_t               op,
 433                                       uint64_t *                dest,
 434                                       const uint64_t *          src,
 435                                       const uint64_t *          mask,
 436                                       int                       width);
 437 void
 438 _pixman_implementation_composite (pixman_implementation_t *     imp,
 439                                   pixman_op_t                   op,
 440                                   pixman_image_t *              src,
 441                                   pixman_image_t *              mask,
 442                                   pixman_image_t *              dest,
 443                                   int32_t                       src_x,
 444                                   int32_t                       src_y,
 445                                   int32_t                       mask_x,
 446                                   int32_t                       mask_y,
 447                                   int32_t                       dest_x,
 448                                   int32_t                       dest_y,
 449                                   int32_t                       width,
 450                                   int32_t                       height);
 451
 452 pixman_bool_t
 453 _pixman_implementation_blt (pixman_implementation_t *   imp,
 454                             uint32_t *                  src_bits,
 455                             uint32_t *                  dst_bits,
 456                             int                         src_stride,
 457                             int                         dst_stride,
 458                             int                         src_bpp,
 459                             int                         dst_bpp,
 460                             int                         src_x,
 461                             int                         src_y,
 462                             int                         dst_x,
 463                             int                         dst_y,
 464                             int                         width,
 465                             int                         height);
 466 pixman_bool_t
 467 _pixman_implementation_fill (pixman_implementation_t *   imp,
 468                              uint32_t *bits,
 469                              int stride,
 470                              int bpp,
 471                              int x,
 472                              int y,
 473                              int width,
 474                              int height,
 475                              uint32_t xor);
 476
 477 /* Specific implementations */
 478 pixman_implementation_t *
 479 _pixman_implementation_create_general (void);
 480 pixman_implementation_t *
 481 _pixman_implementation_create_fast_path (void);
 482 #ifdef USE_MMX
 483 pixman_implementation_t *
 484 _pixman_implementation_create_mmx (void);
 485 #endif
 486 #ifdef USE_SSE2
 487 pixman_implementation_t *
 488 _pixman_implementation_create_sse2 (void);
 489 #endif
 490 #ifdef USE_ARM_SIMD
 491 pixman_implementation_t *
 492 _pixman_implementation_create_arm_simd (void);
 493 #endif
 494 #ifdef USE_ARM_NEON
 495 pixman_implementation_t *
 496 _pixman_implementation_create_arm_neon (void);
 497 #endif
 498 #ifdef USE_VMX
 499 pixman_implementation_t *
 500 _pixman_implementation_create_vmx (void);
 501 #endif
 502
 503 pixman_implementation_t *
 504 _pixman_choose_implementation (void);
 505
 506
 507
 508 /*
 509  * Utilities
 510  */
 511
 512 /* These "formats" both have depth 0, so they
 513  * will never clash with any real ones
 514  */
 515 #define PIXMAN_null             PIXMAN_FORMAT(0,0,0,0,0,0)
 516 #define PIXMAN_solid            PIXMAN_FORMAT(0,1,0,0,0,0)
 517
 518 #define NEED_COMPONENT_ALPHA            (1 << 0)
 519 #define NEED_PIXBUF                     (1 << 1)
 520 #define NEED_SOLID_MASK                 (1 << 2)
 521
 522 typedef struct
 523 {
 524     pixman_op_t                 op;
 525     pixman_format_code_t        src_format;
 526     pixman_format_code_t        mask_format;
 527     pixman_format_code_t        dest_format;
 528     pixman_composite_func_t     func;
 529     uint32_t                    flags;
 530 } pixman_fast_path_t;
 531
 532 /* Memory allocation helpers */
 533 void *
 534 pixman_malloc_ab (unsigned int n, unsigned int b);
 535
 536 void *
 537 pixman_malloc_abc (unsigned int a, unsigned int b, unsigned int c);
 538
 539 pixman_bool_t
 540 pixman_multiply_overflows_int (unsigned int a, unsigned int b);
 541
 542 pixman_bool_t
 543 pixman_addition_overflows_int (unsigned int a, unsigned int b);
 544
 545 /* Compositing utilities */
 546 pixman_bool_t
 547 _pixman_run_fast_path (const pixman_fast_path_t *paths,
 548                        pixman_implementation_t *imp,
 549                        pixman_op_t op,
 550                        pixman_image_t *src,
 551                        pixman_image_t *mask,
 552                        pixman_image_t *dest,
 553                        int32_t src_x,
 554                        int32_t src_y,
 555                        int32_t mask_x,
 556                        int32_t mask_y,
 557                        int32_t dest_x,
 558                        int32_t dest_y,
 559                        int32_t width,
 560                        int32_t height);
 561
 562 void
 563 _pixman_walk_composite_region (pixman_implementation_t *imp,
 564                                pixman_op_t op,
 565                                pixman_image_t * src_image,
 566                                pixman_image_t * mask_image,
 567                                pixman_image_t * dst_image,
 568                                int16_t src_x,
 569                                int16_t src_y,
 570                                int16_t mask_x,
 571                                int16_t mask_y,
 572                                int16_t dest_x,
 573                                int16_t dest_y,
 574                                uint16_t width,
 575                                uint16_t height,
 576                                pixman_composite_func_t compositeRect);
 577
 578 void
 579 pixman_expand (uint64_t *dst, const uint32_t *src, pixman_format_code_t, int width);
 580
 581 void
 582 pixman_contract (uint32_t *dst, const uint64_t *src, int width);
 583
 584
 585 /* Region Helpers */
 586 pixman_bool_t
 587 pixman_region32_copy_from_region16 (pixman_region32_t *dst,
 588                                     pixman_region16_t *src);
 589
 590 pixman_bool_t
 591 pixman_region16_copy_from_region32 (pixman_region16_t *dst,
 592                                     pixman_region32_t *src);
 593
 594
 595 /* Misc macros */
 596
 597 #ifndef FALSE
 598 #   define FALSE 0
 599 #endif
 600
 601 #ifndef TRUE
 602 #   define TRUE 1
 603 #endif
 604
 605 #ifndef MIN
 606 #  define MIN(a,b) ((a < b)? a : b)
 607 #endif
 608
 609 #ifndef MAX
 610 #  define MAX(a,b) ((a > b)? a : b)
 611 #endif
 612
 613 /* Integer division that rounds towards -infinity */
 614 #define DIV(a,b) ((((a) < 0) == ((b) < 0)) ? (a) / (b) :                \
 615                   ((a) - (b) + 1 - (((b) < 0) << 1)) / (b))
 616
 617 /* Modulus that produces the remainder wrt. DIV */
 618 #define MOD(a,b) ((a) < 0 ? ((b) - ((-(a) - 1) % (b))) - 1 : (a) % (b))
 619
 620 #define CLIP(v,low,high) ((v) < (low) ? (low) : ((v) > (high) ? (high) : (v)))
 621
 622 /* Conversion between 8888 and 0565 */
 623
 624 #define CONVERT_8888_TO_0565(s)    ((((s) >> 3) & 0x001f) | \
 625                              (((s) >> 5) & 0x07e0) | \
 626                              (((s) >> 8) & 0xf800))
 627 #define CONVERT_0565_TO_0888(s)    (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) | \
 628                              ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) | \
 629                              ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)))
 630
 631 #define PIXMAN_FORMAT_IS_WIDE(f)        (PIXMAN_FORMAT_A(f) > 8 || \
 632                                          PIXMAN_FORMAT_R(f) > 8 || \
 633                                          PIXMAN_FORMAT_G(f) > 8 || \
 634                                          PIXMAN_FORMAT_B(f) > 8)
 635
 636 /*
 637  * Various debugging code
 638  */
 639
 640 #undef DEBUG
 641 #define DEBUG 0
 642
 643 #if DEBUG
 644
 645 #define return_if_fail(expr)                                            \
 646     do                                                                  \
 647     {                                                                   \
 648         if (!(expr))                                                    \
 649         {                                                               \
 650             fprintf(stderr, "In %s: %s failed\n", FUNC, #expr);         \
 651             return;                                                     \
 652         }                                                               \
 653     }                                                                   \
 654     while (0)
 655
 656 #define return_val_if_fail(expr, retval)                                \
 657     do                                                                  \
 658     {                                                                   \
 659         if (!(expr))                                                    \
 660         {                                                               \
 661             fprintf(stderr, "In %s: %s failed\n", FUNC, #expr);         \
 662             return (retval);                                            \
 663         }                                                               \
 664     }                                                                   \
 665     while (0)
 666
 667 #else
 668
 669 #define return_if_fail(expr)                                            \
 670     do                                                                  \
 671     {                                                                   \
 672         if (!(expr))                                                    \
 673             return;                                                     \
 674     }                                                                   \
 675     while (0)
 676
 677 #define return_val_if_fail(expr, retval)                                \
 678     do                                                                  \
 679     {                                                                   \
 680         if (!(expr))                                                    \
 681             return (retval);                                            \
 682     }                                                                   \
 683     while (0)
 684
 685 #endif
 686
 687 /*
 688  * Timers
 689  */
 690
 691 #ifdef PIXMAN_TIMERS
 692
 693 static inline uint64_t
 694 oil_profile_stamp_rdtsc (void)
 695 {
 696     uint64_t ts;
 697     __asm__ __volatile__("rdtsc\n" : "=A" (ts));
 698     return ts;
 699 }
 700 #define OIL_STAMP oil_profile_stamp_rdtsc
 701
 702 typedef struct pixman_timer_t pixman_timer_t;
 703
 704 struct pixman_timer_t
 705 {
 706     int initialized;
 707     const char *name;
 708     uint64_t n_times;
 709     uint64_t total;
 710     pixman_timer_t *next;
 711 };
 712
 713 extern int timer_defined;
 714 void pixman_timer_register (pixman_timer_t *timer);
 715
 716 #define TIMER_BEGIN(tname)                                              \
 717     {                                                                   \
 718         static pixman_timer_t   timer##tname;                           \
 719         uint64_t                begin##tname;                           \
 720                                                                         \
 721         if (!timer##tname.initialized)                                  \
 722         {                                                               \
 723             timer##tname.initialized = 1;                               \
 724             timer##tname.name = #tname;                                 \
 725             pixman_timer_register (&timer##tname);                      \
 726         }                                                               \
 727                                                                         \
 728         timer##tname.n_times++;                                         \
 729         begin##tname = OIL_STAMP();
 730
 731 #define TIMER_END(tname)                                                \
 732         timer##tname.total += OIL_STAMP() - begin##tname;               \
 733     }
 734
 735 #endif /* PIXMAN_TIMERS */
 736
 737 #endif /* PIXMAN_PRIVATE_H */