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     (*store_scanline_t)  (bits_image_t *image,
  30                                        int x, int y, int width,
  31                                        const uint32_t *values);
  32 typedef void     (*fetchProc32)        (bits_image_t *pict,
  33                                         int x, int y, int width,
  34                                         uint32_t *buffer);
  35 typedef void     (*fetch_pixels_32_t) (bits_image_t *image,
  36                                        uint32_t *buffer, int n_pixels);
  37 typedef void     (*scanFetchProc)     (pixman_image_t *,
  38                                        int, int, int, uint32_t *,
  39                                        uint32_t *, uint32_t);
  40
  41 typedef enum
  42 {
  43     BITS,
  44     LINEAR,
  45     CONICAL,
  46     RADIAL,
  47     SOLID
  48 } image_type_t;
  49
  50 typedef enum
  51 {
  52     SOURCE_IMAGE_CLASS_UNKNOWN,
  53     SOURCE_IMAGE_CLASS_HORIZONTAL,
  54     SOURCE_IMAGE_CLASS_VERTICAL,
  55 } source_pict_class_t;
  56
  57 typedef source_pict_class_t (* classify_func_t) (pixman_image_t *image,
  58                                                  int             x,
  59                                                  int             y,
  60                                                  int             width,
  61                                                  int             height);
  62 typedef void (* property_changed_func_t)        (pixman_image_t *image);
  63
  64 struct image_common
  65 {
  66     image_type_t                type;
  67     int32_t                     ref_count;
  68     pixman_region32_t           clip_region;
  69     pixman_bool_t               have_clip_region;   /* FALSE if there is no clip */
  70     pixman_bool_t               client_clip;        /* Whether the source clip was
  71                                                        set by a client */
  72     pixman_bool_t               clip_sources;       /* Whether the clip applies when
  73                                                      * the image is used as a source
  74                                                      */
  75     pixman_transform_t         *transform;
  76     pixman_repeat_t             repeat;
  77     pixman_filter_t             filter;
  78     pixman_fixed_t             *filter_params;
  79     int                         n_filter_params;
  80     bits_image_t               *alpha_map;
  81     int                         alpha_origin_x;
  82     int                         alpha_origin_y;
  83     pixman_bool_t               component_alpha;
  84     pixman_read_memory_func_t   read_func;
  85     pixman_write_memory_func_t  write_func;
  86     classify_func_t             classify;
  87     property_changed_func_t     property_changed;
  88     scanFetchProc               get_scanline_32;
  89     scanFetchProc               get_scanline_64;
  90
  91     pixman_image_destroy_func_t destroy_func;
  92     void *                      destroy_data;
  93 };
  94
  95 struct source_image
  96 {
  97     image_common_t      common;
  98     source_pict_class_t class;
  99 };
 100
 101 struct solid_fill
 102 {
 103     source_image_t      common;
 104     uint32_t            color;          /* FIXME: shouldn't this be a pixman_color_t? */
 105 };
 106
 107 struct gradient
 108 {
 109     source_image_t              common;
 110     int                         n_stops;
 111     pixman_gradient_stop_t *    stops;
 112     int                         stop_range;
 113     uint32_t *                  color_table;
 114     int                         color_table_size;
 115 };
 116
 117 struct linear_gradient
 118 {
 119     gradient_t                  common;
 120     pixman_point_fixed_t        p1;
 121     pixman_point_fixed_t        p2;
 122 };
 123
 124 struct circle
 125 {
 126     pixman_fixed_t x;
 127     pixman_fixed_t y;
 128     pixman_fixed_t radius;
 129 };
 130
 131 struct radial_gradient
 132 {
 133     gradient_t  common;
 134
 135     circle_t    c1;
 136     circle_t    c2;
 137     double      cdx;
 138     double      cdy;
 139     double      dr;
 140     double      A;
 141 };
 142
 143 struct conical_gradient
 144 {
 145     gradient_t                  common;
 146     pixman_point_fixed_t        center;
 147     pixman_fixed_t              angle;
 148 };
 149
 150 struct bits_image
 151 {
 152     image_common_t              common;
 153     pixman_format_code_t        format;
 154     const pixman_indexed_t     *indexed;
 155     int                         width;
 156     int                         height;
 157     uint32_t *                  bits;
 158     uint32_t *                  free_me;
 159     int                         rowstride; /* in number of uint32_t's */
 160
 161     /* Fetch raw pixels, with no regard for transformations, alpha map etc. */
 162     fetch_pixels_32_t           fetch_pixels_raw_32;
 163     fetch_pixels_32_t           fetch_pixels_raw_64;
 164
 165     /* Fetch raw scanlines, with no regard for transformations, alpha maps etc. */
 166     fetchProc32                 fetch_scanline_raw_32;
 167     fetchProc32                 fetch_scanline_raw_64;
 168
 169     /* Store scanlines with no regard for alpha maps */
 170     store_scanline_t            store_scanline_raw_32;
 171     store_scanline_t            store_scanline_raw_64;
 172
 173     /* Store a scanline, taking alpha maps into account */
 174     store_scanline_t            store_scanline_32;
 175     store_scanline_t            store_scanline_64;
 176
 177     /* Used for indirect access to the bits */
 178     pixman_read_memory_func_t   read_func;
 179     pixman_write_memory_func_t  write_func;
 180 };
 181
 182 union pixman_image
 183 {
 184     image_type_t                type;
 185     image_common_t              common;
 186     bits_image_t                bits;
 187     source_image_t              source;
 188     gradient_t                  gradient;
 189     linear_gradient_t           linear;
 190     conical_gradient_t          conical;
 191     radial_gradient_t           radial;
 192     solid_fill_t                solid;
 193 };
 194
 195
 196 void
 197 _pixman_bits_image_setup_raw_accessors (bits_image_t   *image);
 198
 199 void
 200 _pixman_image_get_scanline_64_generic  (pixman_image_t *pict,
 201                                         int             x,
 202                                         int             y,
 203                                         int             width,
 204                                         uint32_t       *buffer,
 205                                         uint32_t       *mask,
 206                                         uint32_t        maskBits);
 207
 208 source_pict_class_t
 209 _pixman_image_classify (pixman_image_t *image,
 210                         int             x,
 211                         int             y,
 212                         int             width,
 213                         int             height);
 214
 215 void
 216 _pixman_image_get_scanline_32 (pixman_image_t *image, int x, int y, int width,
 217                                uint32_t *buffer, uint32_t *mask,
 218                                uint32_t mask_bits);
 219
 220 /* Even thought the type of buffer is uint32_t *, the function actually expects
 221  * a uint64_t *buffer.
 222  */
 223 void
 224 _pixman_image_get_scanline_64 (pixman_image_t *image, int x, int y, int width,
 225                                uint32_t *buffer,
 226                                uint32_t *unused, uint32_t unused2);
 227
 228 void
 229 _pixman_image_store_scanline_32 (bits_image_t *image, int x, int y, int width,
 230                                  const uint32_t *buffer);
 231 void
 232 _pixman_image_fetch_pixels (bits_image_t *image, uint32_t *buffer,
 233                             int n_pixels);
 234
 235 /* Even thought the type of buffer is uint32_t *, the function actually expects
 236  * a uint64_t *buffer.
 237  */
 238 void
 239 _pixman_image_store_scanline_64 (bits_image_t *image, int x, int y, int width,
 240                                  const uint32_t *buffer);
 241
 242 pixman_image_t *
 243 _pixman_image_allocate (void);
 244
 245 pixman_bool_t
 246 _pixman_init_gradient (gradient_t                   *gradient,
 247                        const pixman_gradient_stop_t *stops,
 248                        int                           n_stops);
 249 void
 250 _pixman_image_reset_clip_region (pixman_image_t *image);
 251
 252 pixman_bool_t
 253 _pixman_image_is_opaque(pixman_image_t *image);
 254
 255 pixman_bool_t
 256 _pixman_image_is_solid (pixman_image_t *image);
 257
 258 uint32_t
 259 _pixman_image_get_solid (pixman_image_t *image,
 260                         pixman_format_code_t format);
 261
 262 #define fbComposeGetStart(pict,x,y,type,out_stride,line,mul) do {       \
 263         uint32_t        *__bits__;                                      \
 264         int             __stride__;                                     \
 265                                                                         \
 266         __bits__ = pict->bits.bits;                                     \
 267         __stride__ = pict->bits.rowstride;                              \
 268         (out_stride) = __stride__ * (int) sizeof (uint32_t) / (int) sizeof (type); \
 269         (line) = ((type *) __bits__) +                                  \
 270             (out_stride) * (y) + (mul) * (x);                           \
 271     } while (0)
 272
 273 /*
 274  * Gradient walker
 275  */
 276 typedef struct
 277 {
 278     uint32_t        left_ag;
 279     uint32_t        left_rb;
 280     uint32_t        right_ag;
 281     uint32_t        right_rb;
 282     int32_t       left_x;
 283     int32_t       right_x;
 284     int32_t       stepper;
 285
 286     pixman_gradient_stop_t      *stops;
 287     int                      num_stops;
 288     unsigned int             spread;
 289
 290     int           need_reset;
 291 } pixman_gradient_walker_t;
 292
 293 void
 294 _pixman_gradient_walker_init (pixman_gradient_walker_t  *walker,
 295                               gradient_t      *gradient,
 296                               unsigned int     spread);
 297
 298 void
 299 _pixman_gradient_walker_reset (pixman_gradient_walker_t       *walker,
 300                                pixman_fixed_32_32_t  pos);
 301
 302 uint32_t
 303 _pixman_gradient_walker_pixel (pixman_gradient_walker_t       *walker,
 304                                pixman_fixed_32_32_t  x);
 305
 306 /*
 307  * Edges
 308  */
 309
 310 #define MAX_ALPHA(n)    ((1 << (n)) - 1)
 311 #define N_Y_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n)/2)) - 1)
 312 #define N_X_FRAC(n)     ((n) == 1 ? 1 : (1 << ((n)/2)) + 1)
 313
 314 #define STEP_Y_SMALL(n) (pixman_fixed_1 / N_Y_FRAC(n))
 315 #define STEP_Y_BIG(n)   (pixman_fixed_1 - (N_Y_FRAC(n) - 1) * STEP_Y_SMALL(n))
 316
 317 #define Y_FRAC_FIRST(n) (STEP_Y_SMALL(n) / 2)
 318 #define Y_FRAC_LAST(n)  (Y_FRAC_FIRST(n) + (N_Y_FRAC(n) - 1) * STEP_Y_SMALL(n))
 319
 320 #define STEP_X_SMALL(n) (pixman_fixed_1 / N_X_FRAC(n))
 321 #define STEP_X_BIG(n)   (pixman_fixed_1 - (N_X_FRAC(n) - 1) * STEP_X_SMALL(n))
 322
 323 #define X_FRAC_FIRST(n) (STEP_X_SMALL(n) / 2)
 324 #define X_FRAC_LAST(n)  (X_FRAC_FIRST(n) + (N_X_FRAC(n) - 1) * STEP_X_SMALL(n))
 325
 326 #define RenderSamplesX(x,n)     ((n) == 1 ? 0 : (pixman_fixed_frac (x) + X_FRAC_FIRST(n)) / STEP_X_SMALL(n))
 327
 328 void
 329 pixman_rasterize_edges_accessors (pixman_image_t *image,
 330                                   pixman_edge_t *l,
 331                                   pixman_edge_t *r,
 332                                   pixman_fixed_t        t,
 333                                   pixman_fixed_t        b);
 334
 335 /*
 336  * Implementations
 337  */
 338
 339 typedef struct pixman_implementation_t pixman_implementation_t;
 340
 341 typedef void (* pixman_combine_32_func_t) (pixman_implementation_t *    imp,
 342                                            pixman_op_t                  op,
 343                                            uint32_t *                   dest,
 344                                            const uint32_t *             src,
 345                                            const uint32_t *             mask,
 346                                            int                          width);
 347
 348 typedef void (* pixman_combine_64_func_t) (pixman_implementation_t *    imp,
 349                                            pixman_op_t                  op,
 350                                            uint64_t *                   dest,
 351                                            const uint64_t *             src,
 352                                            const uint64_t *             mask,
 353                                            int                          width);
 354
 355 typedef void (* pixman_composite_func_t)  (pixman_implementation_t *    imp,
 356                                            pixman_op_t                  op,
 357                                            pixman_image_t *             src,
 358                                            pixman_image_t *             mask,
 359                                            pixman_image_t *             dest,
 360                                            int32_t                      src_x,
 361                                            int32_t                      src_y,
 362                                            int32_t                      mask_x,
 363                                            int32_t                      mask_y,
 364                                            int32_t                      dest_x,
 365                                            int32_t                      dest_y,
 366                                            int32_t                      width,
 367                                            int32_t                      height);
 368 typedef pixman_bool_t (* pixman_blt_func_t) (pixman_implementation_t *  imp,
 369                                              uint32_t *                 src_bits,
 370                                              uint32_t *                 dst_bits,
 371                                              int                        src_stride,
 372                                              int                        dst_stride,
 373                                              int                        src_bpp,
 374                                              int                        dst_bpp,
 375                                              int                        src_x,
 376                                              int                        src_y,
 377                                              int                        dst_x,
 378                                              int                        dst_y,
 379                                              int                        width,
 380                                              int                        height);
 381 typedef pixman_bool_t (* pixman_fill_func_t) (pixman_implementation_t *imp,
 382                                               uint32_t *bits,
 383                                               int stride,
 384                                               int bpp,
 385                                               int x,
 386                                               int y,
 387                                               int width,
 388                                               int height,
 389                                               uint32_t xor);
 390
 391 void _pixman_setup_combiner_functions_32 (pixman_implementation_t *imp);
 392 void _pixman_setup_combiner_functions_64 (pixman_implementation_t *imp);
 393
 394 struct pixman_implementation_t
 395 {
 396     pixman_implementation_t *   toplevel;
 397     pixman_implementation_t *   delegate;
 398
 399     pixman_composite_func_t     composite;
 400     pixman_blt_func_t           blt;
 401     pixman_fill_func_t          fill;
 402
 403     pixman_combine_32_func_t    combine_32[PIXMAN_OP_LAST];
 404     pixman_combine_32_func_t    combine_32_ca[PIXMAN_OP_LAST];
 405     pixman_combine_64_func_t    combine_64[PIXMAN_OP_LAST];
 406     pixman_combine_64_func_t    combine_64_ca[PIXMAN_OP_LAST];
 407 };
 408
 409 pixman_implementation_t *
 410 _pixman_implementation_create (pixman_implementation_t *delegate);
 411
 412 void
 413 _pixman_implementation_combine_32 (pixman_implementation_t *    imp,
 414                                    pixman_op_t                  op,
 415                                    uint32_t *                   dest,
 416                                    const uint32_t *             src,
 417                                    const uint32_t *             mask,
 418                                    int                          width);
 419 void
 420 _pixman_implementation_combine_64 (pixman_implementation_t *    imp,
 421                                    pixman_op_t                  op,
 422                                    uint64_t *                   dest,
 423                                    const uint64_t *             src,
 424                                    const uint64_t *             mask,
 425                                    int                          width);
 426 void
 427 _pixman_implementation_combine_32_ca (pixman_implementation_t * imp,
 428                                       pixman_op_t               op,
 429                                       uint32_t *                dest,
 430                                       const uint32_t *          src,
 431                                       const uint32_t *          mask,
 432                                       int                       width);
 433 void
 434 _pixman_implementation_combine_64_ca (pixman_implementation_t * imp,
 435                                       pixman_op_t               op,
 436                                       uint64_t *                dest,
 437                                       const uint64_t *          src,
 438                                       const uint64_t *          mask,
 439                                       int                       width);
 440 void
 441 _pixman_implementation_composite (pixman_implementation_t *     imp,
 442                                   pixman_op_t                   op,
 443                                   pixman_image_t *              src,
 444                                   pixman_image_t *              mask,
 445                                   pixman_image_t *              dest,
 446                                   int32_t                       src_x,
 447                                   int32_t                       src_y,
 448                                   int32_t                       mask_x,
 449                                   int32_t                       mask_y,
 450                                   int32_t                       dest_x,
 451                                   int32_t                       dest_y,
 452                                   int32_t                       width,
 453                                   int32_t                       height);
 454
 455 pixman_bool_t
 456 _pixman_implementation_blt (pixman_implementation_t *   imp,
 457                             uint32_t *                  src_bits,
 458                             uint32_t *                  dst_bits,
 459                             int                         src_stride,
 460                             int                         dst_stride,
 461                             int                         src_bpp,
 462                             int                         dst_bpp,
 463                             int                         src_x,
 464                             int                         src_y,
 465                             int                         dst_x,
 466                             int                         dst_y,
 467                             int                         width,
 468                             int                         height);
 469 pixman_bool_t
 470 _pixman_implementation_fill (pixman_implementation_t *   imp,
 471                              uint32_t *bits,
 472                              int stride,
 473                              int bpp,
 474                              int x,
 475                              int y,
 476                              int width,
 477                              int height,
 478                              uint32_t xor);
 479
 480 /* Specific implementations */
 481 pixman_implementation_t *
 482 _pixman_implementation_create_general (void);
 483 pixman_implementation_t *
 484 _pixman_implementation_create_fast_path (void);
 485 #ifdef USE_MMX
 486 pixman_implementation_t *
 487 _pixman_implementation_create_mmx (void);
 488 #endif
 489 #ifdef USE_SSE2
 490 pixman_implementation_t *
 491 _pixman_implementation_create_sse2 (void);
 492 #endif
 493 #ifdef USE_ARM_SIMD
 494 pixman_implementation_t *
 495 _pixman_implementation_create_arm_simd (void);
 496 #endif
 497 #ifdef USE_ARM_NEON
 498 pixman_implementation_t *
 499 _pixman_implementation_create_arm_neon (void);
 500 #endif
 501 #ifdef USE_VMX
 502 pixman_implementation_t *
 503 _pixman_implementation_create_vmx (void);
 504 #endif
 505
 506 pixman_implementation_t *
 507 _pixman_choose_implementation (void);
 508
 509
 510
 511 /*
 512  * Utilities
 513  */
 514
 515 /* These "formats" both have depth 0, so they
 516  * will never clash with any real ones
 517  */
 518 #define PIXMAN_null             PIXMAN_FORMAT(0,0,0,0,0,0)
 519 #define PIXMAN_solid            PIXMAN_FORMAT(0,1,0,0,0,0)
 520
 521 #define NEED_COMPONENT_ALPHA            (1 << 0)
 522 #define NEED_PIXBUF                     (1 << 1)
 523 #define NEED_SOLID_MASK                 (1 << 2)
 524
 525 typedef struct
 526 {
 527     pixman_op_t                 op;
 528     pixman_format_code_t        src_format;
 529     pixman_format_code_t        mask_format;
 530     pixman_format_code_t        dest_format;
 531     pixman_composite_func_t     func;
 532     uint32_t                    flags;
 533 } pixman_fast_path_t;
 534
 535 /* Memory allocation helpers */
 536 void *
 537 pixman_malloc_ab (unsigned int n, unsigned int b);
 538
 539 void *
 540 pixman_malloc_abc (unsigned int a, unsigned int b, unsigned int c);
 541
 542 pixman_bool_t
 543 pixman_multiply_overflows_int (unsigned int a, unsigned int b);
 544
 545 pixman_bool_t
 546 pixman_addition_overflows_int (unsigned int a, unsigned int b);
 547
 548 /* Compositing utilities */
 549 pixman_bool_t
 550 _pixman_run_fast_path (const pixman_fast_path_t *paths,
 551                        pixman_implementation_t *imp,
 552                        pixman_op_t op,
 553                        pixman_image_t *src,
 554                        pixman_image_t *mask,
 555                        pixman_image_t *dest,
 556                        int32_t src_x,
 557                        int32_t src_y,
 558                        int32_t mask_x,
 559                        int32_t mask_y,
 560                        int32_t dest_x,
 561                        int32_t dest_y,
 562                        int32_t width,
 563                        int32_t height);
 564
 565 void
 566 _pixman_walk_composite_region (pixman_implementation_t *imp,
 567                                pixman_op_t op,
 568                                pixman_image_t * pSrc,
 569                                pixman_image_t * pMask,
 570                                pixman_image_t * pDst,
 571                                int16_t xSrc,
 572                                int16_t ySrc,
 573                                int16_t xMask,
 574                                int16_t yMask,
 575                                int16_t xDst,
 576                                int16_t yDst,
 577                                uint16_t width,
 578                                uint16_t height,
 579                                pixman_composite_func_t compositeRect);
 580
 581 void
 582 pixman_expand (uint64_t *dst, const uint32_t *src, pixman_format_code_t, int width);
 583
 584 void
 585 pixman_contract (uint32_t *dst, const uint64_t *src, int width);
 586
 587
 588 /* Region Helpers */
 589 pixman_bool_t
 590 pixman_region32_copy_from_region16 (pixman_region32_t *dst,
 591                                     pixman_region16_t *src);
 592
 593 pixman_bool_t
 594 pixman_region16_copy_from_region32 (pixman_region16_t *dst,
 595                                     pixman_region32_t *src);
 596
 597
 598 /* Misc macros */
 599
 600 #ifndef FALSE
 601 #   define FALSE 0
 602 #endif
 603
 604 #ifndef TRUE
 605 #   define TRUE 1
 606 #endif
 607
 608 #ifndef MIN
 609 #  define MIN(a,b) ((a < b)? a : b)
 610 #endif
 611
 612 #ifndef MAX
 613 #  define MAX(a,b) ((a > b)? a : b)
 614 #endif
 615
 616 /* Integer division that rounds towards -infinity */
 617 #define DIV(a,b) ((((a) < 0) == ((b) < 0)) ? (a) / (b) :                \
 618                   ((a) - (b) + 1 - (((b) < 0) << 1)) / (b))
 619
 620 /* Modulus that produces the remainder wrt. DIV */
 621 #define MOD(a,b) ((a) < 0 ? ((b) - ((-(a) - 1) % (b))) - 1 : (a) % (b))
 622
 623 #define CLIP(v,low,high) ((v) < (low) ? (low) : ((v) > (high) ? (high) : (v)))
 624
 625 /* Conversion between 8888 and 0565 */
 626
 627 #define cvt8888to0565(s)    ((((s) >> 3) & 0x001f) | \
 628                              (((s) >> 5) & 0x07e0) | \
 629                              (((s) >> 8) & 0xf800))
 630 #define cvt0565to0888(s)    (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) | \
 631                              ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) | \
 632                              ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)))
 633
 634 #define PIXMAN_FORMAT_IS_WIDE(f)        (PIXMAN_FORMAT_A(f) > 8 || \
 635                                          PIXMAN_FORMAT_R(f) > 8 || \
 636                                          PIXMAN_FORMAT_G(f) > 8 || \
 637                                          PIXMAN_FORMAT_B(f) > 8)
 638
 639 /*
 640  * Various debugging code
 641  */
 642
 643 #undef DEBUG
 644 #define DEBUG 0
 645
 646 #if DEBUG
 647
 648 #define return_if_fail(expr)                                            \
 649     do                                                                  \
 650     {                                                                   \
 651         if (!(expr))                                                    \
 652         {                                                               \
 653             fprintf(stderr, "In %s: %s failed\n", FUNC, #expr);         \
 654             return;                                                     \
 655         }                                                               \
 656     }                                                                   \
 657     while (0)
 658
 659 #define return_val_if_fail(expr, retval)                                \
 660     do                                                                  \
 661     {                                                                   \
 662         if (!(expr))                                                    \
 663         {                                                               \
 664             fprintf(stderr, "In %s: %s failed\n", FUNC, #expr);         \
 665             return (retval);                                            \
 666         }                                                               \
 667     }                                                                   \
 668     while (0)
 669
 670 #else
 671
 672 #define return_if_fail(expr)                                            \
 673     do                                                                  \
 674     {                                                                   \
 675         if (!(expr))                                                    \
 676             return;                                                     \
 677     }                                                                   \
 678     while (0)
 679
 680 #define return_val_if_fail(expr, retval)                                \
 681     do                                                                  \
 682     {                                                                   \
 683         if (!(expr))                                                    \
 684             return (retval);                                            \
 685     }                                                                   \
 686     while (0)
 687
 688 #endif
 689
 690 /*
 691  * Timers
 692  */
 693
 694 #ifdef PIXMAN_TIMERS
 695
 696 static inline uint64_t
 697 oil_profile_stamp_rdtsc (void)
 698 {
 699     uint64_t ts;
 700     __asm__ __volatile__("rdtsc\n" : "=A" (ts));
 701     return ts;
 702 }
 703 #define OIL_STAMP oil_profile_stamp_rdtsc
 704
 705 typedef struct pixman_timer_t pixman_timer_t;
 706
 707 struct pixman_timer_t
 708 {
 709     int initialized;
 710     const char *name;
 711     uint64_t n_times;
 712     uint64_t total;
 713     pixman_timer_t *next;
 714 };
 715
 716 extern int timer_defined;
 717 void pixman_timer_register (pixman_timer_t *timer);
 718
 719 #define TIMER_BEGIN(tname)                                              \
 720     {                                                                   \
 721         static pixman_timer_t   timer##tname;                           \
 722         uint64_t                begin##tname;                           \
 723                                                                         \
 724         if (!timer##tname.initialized)                                  \
 725         {                                                               \
 726             timer##tname.initialized = 1;                               \
 727             timer##tname.name = #tname;                                 \
 728             pixman_timer_register (&timer##tname);                      \
 729         }                                                               \
 730                                                                         \
 731         timer##tname.n_times++;                                         \
 732         begin##tname = OIL_STAMP();
 733
 734 #define TIMER_END(tname)                                                \
 735         timer##tname.total += OIL_STAMP() - begin##tname;               \
 736     }
 737
 738 #endif /* PIXMAN_TIMERS */
 739
 740 #endif /* PIXMAN_PRIVATE_H */