src/gallium/auxiliary/util/u_blitter.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 Marek Olšák <maraeo@gmail.com>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  20  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  **************************************************************************/
  26
  27 #ifndef U_BLITTER_H
  28 #define U_BLITTER_H
  29
  30 #include "util/u_framebuffer.h"
  31 #include "util/u_inlines.h"
  32
  33 #include "pipe/p_state.h"
  34
  35 #ifdef __cplusplus
  36 extern "C" {
  37 #endif
  38
  39 struct pipe_context;
  40
  41 enum blitter_attrib_type {
  42    UTIL_BLITTER_ATTRIB_NONE,
  43    UTIL_BLITTER_ATTRIB_COLOR,
  44    UTIL_BLITTER_ATTRIB_TEXCOORD_XY,
  45    UTIL_BLITTER_ATTRIB_TEXCOORD_XYZW,
  46 };
  47
  48 union blitter_attrib {
  49    float color[4];
  50
  51    struct {
  52       float x1, y1, x2, y2, z, w;
  53    } texcoord;
  54 };
  55
  56 struct blitter_context;
  57
  58 typedef void *(*blitter_get_vs_func)(struct blitter_context *blitter);
  59
  60 struct blitter_context
  61 {
  62    /**
  63     * Draw a rectangle.
  64     *
  65     * \param get_vs  Callback for obtaining the vertex shader for the draw call.
  66     *                It might invoke the shader compiler. The driver is
  67     *                responsible for setting the vertex shader, and the callback
  68     *                allows the driver to query the vertex shader CSO if it
  69     *                wants to use the default one.
  70     * \param x1      An X coordinate of the top-left corner.
  71     * \param y1      A Y coordinate of the top-left corner.
  72     * \param x2      An X coordinate of the bottom-right corner.
  73     * \param y2      A Y coordinate of the bottom-right corner.
  74     * \param depth   A depth which the rectangle is rendered at.
  75     *
  76     * \param type   Semantics of the attributes "attrib".
  77     *               If type is UTIL_BLITTER_ATTRIB_NONE, ignore them.
  78     *               If type is UTIL_BLITTER_ATTRIB_COLOR, the attributes
  79     *               make up a constant RGBA color, and should go
  80     *               to the GENERIC0 varying slot of a fragment shader.
  81     *               If type is UTIL_BLITTER_ATTRIB_TEXCOORD, {a1, a2} and
  82     *               {a3, a4} specify top-left and bottom-right texture
  83     *               coordinates of the rectangle, respectively, and should go
  84     *               to the GENERIC0 varying slot of a fragment shader.
  85     *
  86     * \param attrib See type.
  87     *
  88     * \note A driver may optionally override this callback to implement
  89     *       a specialized hardware path for drawing a rectangle, e.g. using
  90     *       a rectangular point sprite.
  91     */
  92    void (*draw_rectangle)(struct blitter_context *blitter,
  93                           void *vertex_elements_cso,
  94                           blitter_get_vs_func get_vs,
  95                           int x1, int y1, int x2, int y2,
  96                           float depth, unsigned num_instances,
  97                           enum blitter_attrib_type type,
  98                           const union blitter_attrib *attrib);
  99
 100    /* Whether the blitter is running. */
 101    bool running;
 102
 103    bool use_index_buffer;
 104
 105    /* Private members, really. */
 106    struct pipe_context *pipe; /**< pipe context */
 107
 108    void *saved_blend_state;   /**< blend state */
 109    void *saved_dsa_state;     /**< depth stencil alpha state */
 110    void *saved_velem_state;   /**< vertex elements state */
 111    void *saved_rs_state;      /**< rasterizer state */
 112    void *saved_fs, *saved_vs, *saved_gs, *saved_tcs, *saved_tes; /**< shaders */
 113
 114    struct pipe_framebuffer_state saved_fb_state;  /**< framebuffer state */
 115    struct pipe_stencil_ref saved_stencil_ref;     /**< stencil ref */
 116    struct pipe_viewport_state saved_viewport;
 117    struct pipe_scissor_state saved_scissor;
 118    bool skip_viewport_restore;
 119    bool is_sample_mask_saved;
 120    unsigned saved_sample_mask;
 121
 122    unsigned saved_num_sampler_states;
 123    void *saved_sampler_states[PIPE_MAX_SAMPLERS];
 124
 125    unsigned saved_num_sampler_views;
 126    struct pipe_sampler_view *saved_sampler_views[PIPE_MAX_SAMPLERS];
 127
 128    unsigned cb_slot;
 129    struct pipe_constant_buffer saved_fs_constant_buffer;
 130
 131    unsigned vb_slot;
 132    struct pipe_vertex_buffer saved_vertex_buffer;
 133
 134    unsigned saved_num_so_targets;
 135    struct pipe_stream_output_target *saved_so_targets[PIPE_MAX_SO_BUFFERS];
 136
 137    struct pipe_query *saved_render_cond_query;
 138    uint saved_render_cond_mode;
 139    bool saved_render_cond_cond;
 140
 141    boolean saved_window_rectangles_include;
 142    unsigned saved_num_window_rectangles;
 143    struct pipe_scissor_state saved_window_rectangles[PIPE_MAX_WINDOW_RECTANGLES];
 144 };
 145
 146 /**
 147  * Create a blitter context.
 148  */
 149 struct blitter_context *util_blitter_create(struct pipe_context *pipe);
 150
 151 /**
 152  * Destroy a blitter context.
 153  */
 154 void util_blitter_destroy(struct blitter_context *blitter);
 155
 156 void util_blitter_cache_all_shaders(struct blitter_context *blitter);
 157 void *util_blitter_get_noop_blend_state(struct blitter_context *blitter);
 158 void *util_blitter_get_noop_dsa_state(struct blitter_context *blitter);
 159
 160
 161 /**
 162  * Return the pipe context associated with a blitter context.
 163  */
 164 static inline
 165 struct pipe_context *util_blitter_get_pipe(struct blitter_context *blitter)
 166 {
 167    return blitter->pipe;
 168 }
 169
 170 /**
 171  * Override PIPE_CAP_TEXTURE_MULTISAMPLE as reported by the driver.
 172  */
 173 void util_blitter_set_texture_multisample(struct blitter_context *blitter,
 174                                           bool supported);
 175
 176 /* The default function to draw a rectangle. This can only be used
 177  * inside of the draw_rectangle callback if the driver overrides it. */
 178 void util_blitter_draw_rectangle(struct blitter_context *blitter,
 179                                  void *vertex_elements_cso,
 180                                  blitter_get_vs_func get_vs,
 181                                  int x1, int y1, int x2, int y2,
 182                                  float depth, unsigned num_instances,
 183                                  enum blitter_attrib_type type,
 184                                  const union blitter_attrib *attrib);
 185
 186
 187 /*
 188  * These states must be saved before any of the following functions are called:
 189  * - vertex buffers
 190  * - vertex elements
 191  * - vertex shader
 192  * - geometry shader (if supported)
 193  * - stream output targets (if supported)
 194  * - rasterizer state
 195  */
 196
 197 /**
 198  * Clear a specified set of currently bound buffers to specified values.
 199  *
 200  * These states must be saved in the blitter in addition to the state objects
 201  * already required to be saved:
 202  * - fragment shader
 203  * - depth stencil alpha state
 204  * - blend state
 205  */
 206 void util_blitter_clear(struct blitter_context *blitter,
 207                         unsigned width, unsigned height, unsigned num_layers,
 208                         unsigned clear_buffers,
 209                         const union pipe_color_union *color,
 210                         double depth, unsigned stencil,
 211                         bool msaa);
 212
 213 /**
 214  * Check if the blitter (with the help of the driver) can blit between
 215  * the two resources.
 216  */
 217 bool util_blitter_is_copy_supported(struct blitter_context *blitter,
 218                                     const struct pipe_resource *dst,
 219                                     const struct pipe_resource *src);
 220
 221 bool util_blitter_is_blit_supported(struct blitter_context *blitter,
 222                                     const struct pipe_blit_info *info);
 223
 224 /**
 225  * Copy a block of pixels from one surface to another.
 226  *
 227  * These states must be saved in the blitter in addition to the state objects
 228  * already required to be saved:
 229  * - fragment shader
 230  * - depth stencil alpha state
 231  * - blend state
 232  * - fragment sampler states
 233  * - fragment sampler textures
 234  * - framebuffer state
 235  * - sample mask
 236  */
 237 void util_blitter_copy_texture(struct blitter_context *blitter,
 238                                struct pipe_resource *dst,
 239                                unsigned dst_level,
 240                                unsigned dstx, unsigned dsty, unsigned dstz,
 241                                struct pipe_resource *src,
 242                                unsigned src_level,
 243                                const struct pipe_box *srcbox);
 244
 245 /**
 246  * This is a generic implementation of pipe->blit, which accepts
 247  * sampler/surface views instead of resources.
 248  *
 249  * The layer and mipmap level are specified by the views.
 250  *
 251  * Drivers can use this to change resource properties (like format, width,
 252  * height) by changing how the views interpret them, instead of changing
 253  * pipe_resource directly. This is used to blit resources of formats which
 254  * are not renderable.
 255  *
 256  * src_width0 and src_height0 are sampler_view-private properties that
 257  * override pipe_resource. The blitter uses them for computation of texture
 258  * coordinates. The dst dimensions are supplied through pipe_surface::width
 259  * and height.
 260  *
 261  * The mask is a combination of the PIPE_MASK_* flags.
 262  * Set to PIPE_MASK_RGBAZS if unsure.
 263  */
 264 void util_blitter_blit_generic(struct blitter_context *blitter,
 265                                struct pipe_surface *dst,
 266                                const struct pipe_box *dstbox,
 267                                struct pipe_sampler_view *src,
 268                                const struct pipe_box *srcbox,
 269                                unsigned src_width0, unsigned src_height0,
 270                                unsigned mask, unsigned filter,
 271                                const struct pipe_scissor_state *scissor,
 272                                bool alpha_blend);
 273
 274 void util_blitter_blit(struct blitter_context *blitter,
 275                        const struct pipe_blit_info *info);
 276
 277 void util_blitter_generate_mipmap(struct blitter_context *blitter,
 278                                   struct pipe_resource *tex,
 279                                   enum pipe_format format,
 280                                   unsigned base_level, unsigned last_level,
 281                                   unsigned first_layer, unsigned last_layer);
 282
 283 /**
 284  * Helper function to initialize a view for copy_texture_view.
 285  * The parameters must match copy_texture_view.
 286  */
 287 void util_blitter_default_dst_texture(struct pipe_surface *dst_templ,
 288                                       struct pipe_resource *dst,
 289                                       unsigned dstlevel,
 290                                       unsigned dstz);
 291
 292 /**
 293  * Helper function to initialize a view for copy_texture_view.
 294  * The parameters must match copy_texture_view.
 295  */
 296 void util_blitter_default_src_texture(struct blitter_context *blitter,
 297                                       struct pipe_sampler_view *src_templ,
 298                                       struct pipe_resource *src,
 299                                       unsigned srclevel);
 300
 301 /**
 302  * Copy data from one buffer to another using the Stream Output functionality.
 303  * 4-byte alignment is required, otherwise software fallback is used.
 304  */
 305 void util_blitter_copy_buffer(struct blitter_context *blitter,
 306                               struct pipe_resource *dst,
 307                               unsigned dstx,
 308                               struct pipe_resource *src,
 309                               unsigned srcx,
 310                               unsigned size);
 311
 312 /**
 313  * Clear the contents of a buffer using the Stream Output functionality.
 314  * 4-byte alignment is required.
 315  *
 316  * "num_channels" can be 1, 2, 3, or 4, and specifies if the clear value is
 317  * R, RG, RGB, or RGBA.
 318  *
 319  * For each element, only "num_channels" components of "clear_value" are
 320  * copied to the buffer, then the offset is incremented by num_channels*4.
 321  */
 322 void util_blitter_clear_buffer(struct blitter_context *blitter,
 323                                struct pipe_resource *dst,
 324                                unsigned offset, unsigned size,
 325                                unsigned num_channels,
 326                                const union pipe_color_union *clear_value);
 327
 328 /**
 329  * Clear a region of a (color) surface to a constant value.
 330  *
 331  * These states must be saved in the blitter in addition to the state objects
 332  * already required to be saved:
 333  * - fragment shader
 334  * - depth stencil alpha state
 335  * - blend state
 336  * - framebuffer state
 337  */
 338 void util_blitter_clear_render_target(struct blitter_context *blitter,
 339                                       struct pipe_surface *dst,
 340                                       const union pipe_color_union *color,
 341                                       unsigned dstx, unsigned dsty,
 342                                       unsigned width, unsigned height);
 343
 344 /**
 345  * Clear a region of a depth-stencil surface, both stencil and depth
 346  * or only one of them if this is a combined depth-stencil surface.
 347  *
 348  * These states must be saved in the blitter in addition to the state objects
 349  * already required to be saved:
 350  * - fragment shader
 351  * - depth stencil alpha state
 352  * - blend state
 353  * - framebuffer state
 354  */
 355 void util_blitter_clear_depth_stencil(struct blitter_context *blitter,
 356                                       struct pipe_surface *dst,
 357                                       unsigned clear_flags,
 358                                       double depth,
 359                                       unsigned stencil,
 360                                       unsigned dstx, unsigned dsty,
 361                                       unsigned width, unsigned height);
 362
 363 /* The following functions are customized variants of the clear functions.
 364  * Some drivers use them internally to do things like MSAA resolve
 365  * and resource decompression. It usually consists of rendering a full-screen
 366  * quad with a special blend or DSA state.
 367  */
 368
 369 /* Used by r300g for depth decompression. */
 370 void util_blitter_custom_clear_depth(struct blitter_context *blitter,
 371                                      unsigned width, unsigned height,
 372                                      double depth, void *custom_dsa);
 373
 374 /* Used by r600g for depth decompression. */
 375 void util_blitter_custom_depth_stencil(struct blitter_context *blitter,
 376                                        struct pipe_surface *zsurf,
 377                                        struct pipe_surface *cbsurf,
 378                                        unsigned sample_mask,
 379                                        void *dsa_stage, float depth);
 380
 381 /* Used by r600g for color decompression. */
 382 void util_blitter_custom_color(struct blitter_context *blitter,
 383                                struct pipe_surface *dstsurf,
 384                                void *custom_blend);
 385
 386 /* Used by r600g for MSAA color resolve. */
 387 void util_blitter_custom_resolve_color(struct blitter_context *blitter,
 388                                        struct pipe_resource *dst,
 389                                        unsigned dst_level,
 390                                        unsigned dst_layer,
 391                                        struct pipe_resource *src,
 392                                        unsigned src_layer,
 393                                        unsigned sampled_mask,
 394                                        void *custom_blend,
 395                                        enum pipe_format format);
 396
 397 /* Used by vc4 for 8/16-bit linear-to-tiled blits */
 398 void util_blitter_custom_shader(struct blitter_context *blitter,
 399                                 struct pipe_surface *dstsurf,
 400                                 void *custom_vs, void *custom_fs);
 401
 402 /* The functions below should be used to save currently bound constant state
 403  * objects inside a driver. The objects are automatically restored at the end
 404  * of the util_blitter_{clear, copy_region, fill_region} functions and then
 405  * forgotten.
 406  *
 407  * States not listed here are not affected by util_blitter. */
 408
 409 static inline void
 410 util_blitter_save_blend(struct blitter_context *blitter, void *state)
 411 {
 412    blitter->saved_blend_state = state;
 413 }
 414
 415 static inline void
 416 util_blitter_save_depth_stencil_alpha(struct blitter_context *blitter,
 417                                       void *state)
 418 {
 419    blitter->saved_dsa_state = state;
 420 }
 421
 422 static inline void
 423 util_blitter_save_vertex_elements(struct blitter_context *blitter, void *state)
 424 {
 425    blitter->saved_velem_state = state;
 426 }
 427
 428 static inline void
 429 util_blitter_save_stencil_ref(struct blitter_context *blitter,
 430                               const struct pipe_stencil_ref *state)
 431 {
 432    blitter->saved_stencil_ref = *state;
 433 }
 434
 435 static inline void
 436 util_blitter_save_rasterizer(struct blitter_context *blitter, void *state)
 437 {
 438    blitter->saved_rs_state = state;
 439 }
 440
 441 static inline void
 442 util_blitter_save_fragment_shader(struct blitter_context *blitter, void *fs)
 443 {
 444    blitter->saved_fs = fs;
 445 }
 446
 447 static inline void
 448 util_blitter_save_vertex_shader(struct blitter_context *blitter, void *vs)
 449 {
 450    blitter->saved_vs = vs;
 451 }
 452
 453 static inline void
 454 util_blitter_save_geometry_shader(struct blitter_context *blitter, void *gs)
 455 {
 456    blitter->saved_gs = gs;
 457 }
 458
 459 static inline void
 460 util_blitter_save_tessctrl_shader(struct blitter_context *blitter,
 461                                   void *sh)
 462 {
 463    blitter->saved_tcs = sh;
 464 }
 465
 466 static inline void
 467 util_blitter_save_tesseval_shader(struct blitter_context *blitter,
 468                                   void *sh)
 469 {
 470    blitter->saved_tes = sh;
 471 }
 472
 473 static inline void
 474 util_blitter_save_framebuffer(struct blitter_context *blitter,
 475                               const struct pipe_framebuffer_state *state)
 476 {
 477    blitter->saved_fb_state.nr_cbufs = 0; /* It's ~0 now, meaning it's unsaved. */
 478    util_copy_framebuffer_state(&blitter->saved_fb_state, state);
 479 }
 480
 481 static inline void
 482 util_blitter_save_viewport(struct blitter_context *blitter,
 483                            struct pipe_viewport_state *state)
 484 {
 485    blitter->saved_viewport = *state;
 486 }
 487
 488 static inline void
 489 util_blitter_save_scissor(struct blitter_context *blitter,
 490                           struct pipe_scissor_state *state)
 491 {
 492    blitter->saved_scissor = *state;
 493 }
 494
 495 static inline void
 496 util_blitter_save_fragment_sampler_states(
 497                   struct blitter_context *blitter,
 498                   unsigned num_sampler_states,
 499                   void **sampler_states)
 500 {
 501    assert(num_sampler_states <= ARRAY_SIZE(blitter->saved_sampler_states));
 502
 503    blitter->saved_num_sampler_states = num_sampler_states;
 504    memcpy(blitter->saved_sampler_states, sampler_states,
 505           num_sampler_states * sizeof(void *));
 506 }
 507
 508 static inline void
 509 util_blitter_save_fragment_sampler_views(struct blitter_context *blitter,
 510                                          unsigned num_views,
 511                                          struct pipe_sampler_view **views)
 512 {
 513    unsigned i;
 514    assert(num_views <= ARRAY_SIZE(blitter->saved_sampler_views));
 515
 516    blitter->saved_num_sampler_views = num_views;
 517    for (i = 0; i < num_views; i++)
 518       pipe_sampler_view_reference(&blitter->saved_sampler_views[i],
 519                                   views[i]);
 520 }
 521
 522 static inline void
 523 util_blitter_save_fragment_constant_buffer_slot(
 524                   struct blitter_context *blitter,
 525                   struct pipe_constant_buffer *constant_buffers)
 526 {
 527    pipe_resource_reference(&blitter->saved_fs_constant_buffer.buffer,
 528                            constant_buffers[blitter->cb_slot].buffer);
 529    memcpy(&blitter->saved_fs_constant_buffer, &constant_buffers[blitter->cb_slot],
 530           sizeof(struct pipe_constant_buffer));
 531 }
 532
 533 static inline void
 534 util_blitter_save_vertex_buffer_slot(struct blitter_context *blitter,
 535                                      struct pipe_vertex_buffer *vertex_buffers)
 536 {
 537    pipe_vertex_buffer_reference(&blitter->saved_vertex_buffer,
 538                                 &vertex_buffers[blitter->vb_slot]);
 539 }
 540
 541 static inline void
 542 util_blitter_save_so_targets(struct blitter_context *blitter,
 543                              unsigned num_targets,
 544                              struct pipe_stream_output_target **targets)
 545 {
 546    unsigned i;
 547    assert(num_targets <= ARRAY_SIZE(blitter->saved_so_targets));
 548
 549    blitter->saved_num_so_targets = num_targets;
 550    for (i = 0; i < num_targets; i++)
 551       pipe_so_target_reference(&blitter->saved_so_targets[i],
 552                                targets[i]);
 553 }
 554
 555 static inline void
 556 util_blitter_save_sample_mask(struct blitter_context *blitter,
 557                               unsigned sample_mask)
 558 {
 559    blitter->is_sample_mask_saved = true;
 560    blitter->saved_sample_mask = sample_mask;
 561 }
 562
 563 static inline void
 564 util_blitter_save_render_condition(struct blitter_context *blitter,
 565                                    struct pipe_query *query,
 566                                    bool condition,
 567                                    enum pipe_render_cond_flag mode)
 568 {
 569    blitter->saved_render_cond_query = query;
 570    blitter->saved_render_cond_mode = mode;
 571    blitter->saved_render_cond_cond = condition;
 572 }
 573
 574 static inline void
 575 util_blitter_save_window_rectangles(struct blitter_context *blitter,
 576                                     boolean include,
 577                                     unsigned num_rectangles,
 578                                     const struct pipe_scissor_state *rects)
 579 {
 580    blitter->saved_window_rectangles_include = include;
 581    blitter->saved_num_window_rectangles = num_rectangles;
 582    if (num_rectangles > 0) {
 583       assert(num_rectangles < ARRAY_SIZE(blitter->saved_window_rectangles));
 584       memcpy(blitter->saved_window_rectangles, rects,
 585              sizeof(*rects) * num_rectangles);
 586    }
 587 }
 588
 589 void util_blitter_common_clear_setup(struct blitter_context *blitter,
 590                                      unsigned width, unsigned height,
 591                                      unsigned clear_buffers,
 592                                      void *custom_blend, void *custom_dsa);
 593
 594 void util_blitter_set_running_flag(struct blitter_context *blitter);
 595 void util_blitter_unset_running_flag(struct blitter_context *blitter);
 596
 597 void util_blitter_restore_vertex_states(struct blitter_context *blitter);
 598 void util_blitter_restore_fragment_states(struct blitter_context *blitter);
 599 void util_blitter_restore_render_cond(struct blitter_context *blitter);
 600 void util_blitter_restore_fb_state(struct blitter_context *blitter);
 601 void util_blitter_restore_textures(struct blitter_context *blitter);
 602 void util_blitter_restore_constant_buffer_state(struct blitter_context *blitter);
 603
 604 /* These are supported combinations of blits from ZS to color and vice versa.
 605  * The blitter will do the packing/unpacking of depth and stencil
 606  * in the fragment shader.
 607  */
 608 static inline enum pipe_format
 609 util_blitter_get_color_format_for_zs(enum pipe_format format)
 610 {
 611    switch (format) {
 612    case PIPE_FORMAT_Z16_UNORM:
 613       return PIPE_FORMAT_R16_UNORM;
 614
 615    case PIPE_FORMAT_Z32_FLOAT:
 616       return PIPE_FORMAT_R32_FLOAT;
 617
 618    case PIPE_FORMAT_Z24_UNORM_S8_UINT:
 619    case PIPE_FORMAT_Z24X8_UNORM:
 620    case PIPE_FORMAT_S8_UINT_Z24_UNORM:
 621    case PIPE_FORMAT_X8Z24_UNORM:
 622       return PIPE_FORMAT_R32_UINT;
 623
 624    case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
 625       return PIPE_FORMAT_R32G32_UINT;
 626
 627    case PIPE_FORMAT_Z32_UNORM:
 628    default:
 629       assert(0);
 630    }
 631    return PIPE_FORMAT_NONE;
 632 }
 633
 634 #ifdef __cplusplus
 635 }
 636 #endif
 637
 638 #endif