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 unsigned saved_min_samples;
122
123 unsigned saved_num_sampler_states;
124 void *saved_sampler_states[PIPE_MAX_SAMPLERS];
125
126 unsigned saved_num_sampler_views;
127 struct pipe_sampler_view *saved_sampler_views[PIPE_MAX_SAMPLERS];
128
129 unsigned cb_slot;
130 struct pipe_constant_buffer saved_fs_constant_buffer;
131
132 unsigned vb_slot;
133 struct pipe_vertex_buffer saved_vertex_buffer;
134
135 unsigned saved_num_so_targets;
136 struct pipe_stream_output_target *saved_so_targets[PIPE_MAX_SO_BUFFERS];
137
138 struct pipe_query *saved_render_cond_query;
139 uint saved_render_cond_mode;
140 bool saved_render_cond_cond;
141
142 boolean saved_window_rectangles_include;
143 unsigned saved_num_window_rectangles;
144 struct pipe_scissor_state saved_window_rectangles[PIPE_MAX_WINDOW_RECTANGLES];
145 };
146
147 /**
148 * Create a blitter context.
149 */
150 struct blitter_context *util_blitter_create(struct pipe_context *pipe);
151
152 /**
153 * Destroy a blitter context.
154 */
155 void util_blitter_destroy(struct blitter_context *blitter);
156
157 void util_blitter_cache_all_shaders(struct blitter_context *blitter);
158 void *util_blitter_get_noop_blend_state(struct blitter_context *blitter);
159 void *util_blitter_get_noop_dsa_state(struct blitter_context *blitter);
160 void *util_blitter_get_discard_rasterizer_state(struct blitter_context *blitter);
161
162
163 /**
164 * Return the pipe context associated with a blitter context.
165 */
166 static inline
util_blitter_get_pipe(struct blitter_context * blitter)167 struct pipe_context *util_blitter_get_pipe(struct blitter_context *blitter)
168 {
169 return blitter->pipe;
170 }
171
172 /**
173 * Override PIPE_CAP_TEXTURE_MULTISAMPLE as reported by the driver.
174 */
175 void util_blitter_set_texture_multisample(struct blitter_context *blitter,
176 bool supported);
177
178 /* The default function to draw a rectangle. This can only be used
179 * inside of the draw_rectangle callback if the driver overrides it. */
180 void util_blitter_draw_rectangle(struct blitter_context *blitter,
181 void *vertex_elements_cso,
182 blitter_get_vs_func get_vs,
183 int x1, int y1, int x2, int y2,
184 float depth, unsigned num_instances,
185 enum blitter_attrib_type type,
186 const union blitter_attrib *attrib);
187
188
189 /*
190 * These states must be saved before any of the following functions are called:
191 * - vertex buffers
192 * - vertex elements
193 * - vertex shader
194 * - geometry shader (if supported)
195 * - stream output targets (if supported)
196 * - rasterizer state
197 */
198
199 /**
200 * Clear a specified set of currently bound buffers to specified values.
201 *
202 * These states must be saved in the blitter in addition to the state objects
203 * already required to be saved:
204 * - fragment shader
205 * - depth stencil alpha state
206 * - blend state
207 */
208 void util_blitter_clear(struct blitter_context *blitter,
209 unsigned width, unsigned height, unsigned num_layers,
210 unsigned clear_buffers,
211 const union pipe_color_union *color,
212 double depth, unsigned stencil,
213 bool msaa);
214
215 /**
216 * Check if the blitter (with the help of the driver) can blit between
217 * the two resources.
218 */
219 bool util_blitter_is_copy_supported(struct blitter_context *blitter,
220 const struct pipe_resource *dst,
221 const struct pipe_resource *src);
222
223 bool util_blitter_is_blit_supported(struct blitter_context *blitter,
224 const struct pipe_blit_info *info);
225
226 /**
227 * Copy a block of pixels from one surface to another.
228 *
229 * These states must be saved in the blitter in addition to the state objects
230 * already required to be saved:
231 * - fragment shader
232 * - depth stencil alpha state
233 * - blend state
234 * - fragment sampler states
235 * - fragment sampler textures
236 * - framebuffer state
237 * - sample mask
238 */
239 void util_blitter_copy_texture(struct blitter_context *blitter,
240 struct pipe_resource *dst,
241 unsigned dst_level,
242 unsigned dstx, unsigned dsty, unsigned dstz,
243 struct pipe_resource *src,
244 unsigned src_level,
245 const struct pipe_box *srcbox);
246
247 /**
248 * This is a generic implementation of pipe->blit, which accepts
249 * sampler/surface views instead of resources.
250 *
251 * The layer and mipmap level are specified by the views.
252 *
253 * Drivers can use this to change resource properties (like format, width,
254 * height) by changing how the views interpret them, instead of changing
255 * pipe_resource directly. This is used to blit resources of formats which
256 * are not renderable.
257 *
258 * src_width0 and src_height0 are sampler_view-private properties that
259 * override pipe_resource. The blitter uses them for computation of texture
260 * coordinates. The dst dimensions are supplied through pipe_surface::width
261 * and height.
262 *
263 * The mask is a combination of the PIPE_MASK_* flags.
264 * Set to PIPE_MASK_RGBAZS if unsure.
265 */
266 void util_blitter_blit_generic(struct blitter_context *blitter,
267 struct pipe_surface *dst,
268 const struct pipe_box *dstbox,
269 struct pipe_sampler_view *src,
270 const struct pipe_box *srcbox,
271 unsigned src_width0, unsigned src_height0,
272 unsigned mask, unsigned filter,
273 const struct pipe_scissor_state *scissor,
274 bool alpha_blend, bool sample0_only,
275 unsigned dst_sample);
276
277 void util_blitter_blit(struct blitter_context *blitter,
278 const struct pipe_blit_info *info);
279
280 void util_blitter_generate_mipmap(struct blitter_context *blitter,
281 struct pipe_resource *tex,
282 enum pipe_format format,
283 unsigned base_level, unsigned last_level,
284 unsigned first_layer, unsigned last_layer);
285
286 /**
287 * Helper function to initialize a view for copy_texture_view.
288 * The parameters must match copy_texture_view.
289 */
290 void util_blitter_default_dst_texture(struct pipe_surface *dst_templ,
291 struct pipe_resource *dst,
292 unsigned dstlevel,
293 unsigned dstz);
294
295 /**
296 * Helper function to initialize a view for copy_texture_view.
297 * The parameters must match copy_texture_view.
298 */
299 void util_blitter_default_src_texture(struct blitter_context *blitter,
300 struct pipe_sampler_view *src_templ,
301 struct pipe_resource *src,
302 unsigned srclevel);
303
304 /**
305 * Clear the contents of a buffer using the Stream Output functionality.
306 * 4-byte alignment is required.
307 *
308 * "num_channels" can be 1, 2, 3, or 4, and specifies if the clear value is
309 * R, RG, RGB, or RGBA.
310 *
311 * For each element, only "num_channels" components of "clear_value" are
312 * copied to the buffer, then the offset is incremented by num_channels*4.
313 */
314 void util_blitter_clear_buffer(struct blitter_context *blitter,
315 struct pipe_resource *dst,
316 unsigned offset, unsigned size,
317 unsigned num_channels,
318 const union pipe_color_union *clear_value);
319
320 /**
321 * Clear a region of a (color) surface to a constant value.
322 *
323 * These states must be saved in the blitter in addition to the state objects
324 * already required to be saved:
325 * - fragment shader
326 * - depth stencil alpha state
327 * - blend state
328 * - framebuffer state
329 */
330 void util_blitter_clear_render_target(struct blitter_context *blitter,
331 struct pipe_surface *dst,
332 const union pipe_color_union *color,
333 unsigned dstx, unsigned dsty,
334 unsigned width, unsigned height);
335
336 /**
337 * Clear a region of a depth-stencil surface, both stencil and depth
338 * or only one of them if this is a combined depth-stencil surface.
339 *
340 * These states must be saved in the blitter in addition to the state objects
341 * already required to be saved:
342 * - fragment shader
343 * - depth stencil alpha state
344 * - blend state
345 * - framebuffer state
346 */
347 void util_blitter_clear_depth_stencil(struct blitter_context *blitter,
348 struct pipe_surface *dst,
349 unsigned clear_flags,
350 double depth,
351 unsigned stencil,
352 unsigned dstx, unsigned dsty,
353 unsigned width, unsigned height);
354
355 /* The following functions are customized variants of the clear functions.
356 * Some drivers use them internally to do things like MSAA resolve
357 * and resource decompression. It usually consists of rendering a full-screen
358 * quad with a special blend or DSA state.
359 */
360
361 /* Used by r300g for depth decompression. */
362 void util_blitter_custom_clear_depth(struct blitter_context *blitter,
363 unsigned width, unsigned height,
364 double depth, void *custom_dsa);
365
366 /* Used by r600g for depth decompression. */
367 void util_blitter_custom_depth_stencil(struct blitter_context *blitter,
368 struct pipe_surface *zsurf,
369 struct pipe_surface *cbsurf,
370 unsigned sample_mask,
371 void *dsa_stage, float depth);
372
373 /* Used by r600g for color decompression. */
374 void util_blitter_custom_color(struct blitter_context *blitter,
375 struct pipe_surface *dstsurf,
376 void *custom_blend);
377
378 /* Used by r600g for MSAA color resolve. */
379 void util_blitter_custom_resolve_color(struct blitter_context *blitter,
380 struct pipe_resource *dst,
381 unsigned dst_level,
382 unsigned dst_layer,
383 struct pipe_resource *src,
384 unsigned src_layer,
385 unsigned sampled_mask,
386 void *custom_blend,
387 enum pipe_format format);
388
389 /* Used by vc4 for 8/16-bit linear-to-tiled blits */
390 void util_blitter_custom_shader(struct blitter_context *blitter,
391 struct pipe_surface *dstsurf,
392 void *custom_vs, void *custom_fs);
393
394 /* Used by D3D12 for non-MSAA -> MSAA stencil blits */
395 void util_blitter_stencil_fallback(struct blitter_context *blitter,
396 struct pipe_resource *dst,
397 unsigned dst_level,
398 const struct pipe_box *dstbox,
399 struct pipe_resource *src,
400 unsigned src_level,
401 const struct pipe_box *srcbox,
402 const struct pipe_scissor_state *scissor);
403
404 /* The functions below should be used to save currently bound constant state
405 * objects inside a driver. The objects are automatically restored at the end
406 * of the util_blitter_{clear, copy_region, fill_region} functions and then
407 * forgotten.
408 *
409 * States not listed here are not affected by util_blitter. */
410
411 static inline void
util_blitter_save_blend(struct blitter_context * blitter,void * state)412 util_blitter_save_blend(struct blitter_context *blitter, void *state)
413 {
414 blitter->saved_blend_state = state;
415 }
416
417 static inline void
util_blitter_save_depth_stencil_alpha(struct blitter_context * blitter,void * state)418 util_blitter_save_depth_stencil_alpha(struct blitter_context *blitter,
419 void *state)
420 {
421 blitter->saved_dsa_state = state;
422 }
423
424 static inline void
util_blitter_save_vertex_elements(struct blitter_context * blitter,void * state)425 util_blitter_save_vertex_elements(struct blitter_context *blitter, void *state)
426 {
427 blitter->saved_velem_state = state;
428 }
429
430 static inline void
util_blitter_save_stencil_ref(struct blitter_context * blitter,const struct pipe_stencil_ref * state)431 util_blitter_save_stencil_ref(struct blitter_context *blitter,
432 const struct pipe_stencil_ref *state)
433 {
434 blitter->saved_stencil_ref = *state;
435 }
436
437 static inline void
util_blitter_save_rasterizer(struct blitter_context * blitter,void * state)438 util_blitter_save_rasterizer(struct blitter_context *blitter, void *state)
439 {
440 blitter->saved_rs_state = state;
441 }
442
443 static inline void
util_blitter_save_fragment_shader(struct blitter_context * blitter,void * fs)444 util_blitter_save_fragment_shader(struct blitter_context *blitter, void *fs)
445 {
446 blitter->saved_fs = fs;
447 }
448
449 static inline void
util_blitter_save_vertex_shader(struct blitter_context * blitter,void * vs)450 util_blitter_save_vertex_shader(struct blitter_context *blitter, void *vs)
451 {
452 blitter->saved_vs = vs;
453 }
454
455 static inline void
util_blitter_save_geometry_shader(struct blitter_context * blitter,void * gs)456 util_blitter_save_geometry_shader(struct blitter_context *blitter, void *gs)
457 {
458 blitter->saved_gs = gs;
459 }
460
461 static inline void
util_blitter_save_tessctrl_shader(struct blitter_context * blitter,void * sh)462 util_blitter_save_tessctrl_shader(struct blitter_context *blitter,
463 void *sh)
464 {
465 blitter->saved_tcs = sh;
466 }
467
468 static inline void
util_blitter_save_tesseval_shader(struct blitter_context * blitter,void * sh)469 util_blitter_save_tesseval_shader(struct blitter_context *blitter,
470 void *sh)
471 {
472 blitter->saved_tes = sh;
473 }
474
475 static inline void
util_blitter_save_framebuffer(struct blitter_context * blitter,const struct pipe_framebuffer_state * state)476 util_blitter_save_framebuffer(struct blitter_context *blitter,
477 const struct pipe_framebuffer_state *state)
478 {
479 blitter->saved_fb_state.nr_cbufs = 0; /* It's ~0 now, meaning it's unsaved. */
480 util_copy_framebuffer_state(&blitter->saved_fb_state, state);
481 }
482
483 static inline void
util_blitter_save_viewport(struct blitter_context * blitter,struct pipe_viewport_state * state)484 util_blitter_save_viewport(struct blitter_context *blitter,
485 struct pipe_viewport_state *state)
486 {
487 blitter->saved_viewport = *state;
488 }
489
490 static inline void
util_blitter_save_scissor(struct blitter_context * blitter,struct pipe_scissor_state * state)491 util_blitter_save_scissor(struct blitter_context *blitter,
492 struct pipe_scissor_state *state)
493 {
494 blitter->saved_scissor = *state;
495 }
496
497 static inline void
util_blitter_save_fragment_sampler_states(struct blitter_context * blitter,unsigned num_sampler_states,void ** sampler_states)498 util_blitter_save_fragment_sampler_states(
499 struct blitter_context *blitter,
500 unsigned num_sampler_states,
501 void **sampler_states)
502 {
503 assert(num_sampler_states <= ARRAY_SIZE(blitter->saved_sampler_states));
504
505 blitter->saved_num_sampler_states = num_sampler_states;
506 memcpy(blitter->saved_sampler_states, sampler_states,
507 num_sampler_states * sizeof(void *));
508 }
509
510 static inline void
util_blitter_save_fragment_sampler_views(struct blitter_context * blitter,unsigned num_views,struct pipe_sampler_view ** views)511 util_blitter_save_fragment_sampler_views(struct blitter_context *blitter,
512 unsigned num_views,
513 struct pipe_sampler_view **views)
514 {
515 unsigned i;
516 assert(num_views <= ARRAY_SIZE(blitter->saved_sampler_views));
517
518 blitter->saved_num_sampler_views = num_views;
519 for (i = 0; i < num_views; i++)
520 pipe_sampler_view_reference(&blitter->saved_sampler_views[i],
521 views[i]);
522 }
523
524 static inline void
util_blitter_save_fragment_constant_buffer_slot(struct blitter_context * blitter,struct pipe_constant_buffer * constant_buffers)525 util_blitter_save_fragment_constant_buffer_slot(
526 struct blitter_context *blitter,
527 struct pipe_constant_buffer *constant_buffers)
528 {
529 pipe_resource_reference(&blitter->saved_fs_constant_buffer.buffer,
530 constant_buffers[blitter->cb_slot].buffer);
531 memcpy(&blitter->saved_fs_constant_buffer, &constant_buffers[blitter->cb_slot],
532 sizeof(struct pipe_constant_buffer));
533 }
534
535 static inline void
util_blitter_save_vertex_buffer_slot(struct blitter_context * blitter,struct pipe_vertex_buffer * vertex_buffers)536 util_blitter_save_vertex_buffer_slot(struct blitter_context *blitter,
537 struct pipe_vertex_buffer *vertex_buffers)
538 {
539 pipe_vertex_buffer_reference(&blitter->saved_vertex_buffer,
540 &vertex_buffers[blitter->vb_slot]);
541 }
542
543 static inline void
util_blitter_save_so_targets(struct blitter_context * blitter,unsigned num_targets,struct pipe_stream_output_target ** targets)544 util_blitter_save_so_targets(struct blitter_context *blitter,
545 unsigned num_targets,
546 struct pipe_stream_output_target **targets)
547 {
548 unsigned i;
549 assert(num_targets <= ARRAY_SIZE(blitter->saved_so_targets));
550
551 blitter->saved_num_so_targets = num_targets;
552 for (i = 0; i < num_targets; i++)
553 pipe_so_target_reference(&blitter->saved_so_targets[i],
554 targets[i]);
555 }
556
557 static inline void
util_blitter_save_sample_mask(struct blitter_context * blitter,unsigned sample_mask,unsigned min_samples)558 util_blitter_save_sample_mask(struct blitter_context *blitter,
559 unsigned sample_mask, unsigned min_samples)
560 {
561 blitter->is_sample_mask_saved = true;
562 blitter->saved_sample_mask = sample_mask;
563 blitter->saved_min_samples = min_samples;
564 }
565
566 static inline void
util_blitter_save_render_condition(struct blitter_context * blitter,struct pipe_query * query,bool condition,enum pipe_render_cond_flag mode)567 util_blitter_save_render_condition(struct blitter_context *blitter,
568 struct pipe_query *query,
569 bool condition,
570 enum pipe_render_cond_flag mode)
571 {
572 blitter->saved_render_cond_query = query;
573 blitter->saved_render_cond_mode = mode;
574 blitter->saved_render_cond_cond = condition;
575 }
576
577 static inline void
util_blitter_save_window_rectangles(struct blitter_context * blitter,boolean include,unsigned num_rectangles,const struct pipe_scissor_state * rects)578 util_blitter_save_window_rectangles(struct blitter_context *blitter,
579 boolean include,
580 unsigned num_rectangles,
581 const struct pipe_scissor_state *rects)
582 {
583 blitter->saved_window_rectangles_include = include;
584 blitter->saved_num_window_rectangles = num_rectangles;
585 if (num_rectangles > 0) {
586 assert(num_rectangles < ARRAY_SIZE(blitter->saved_window_rectangles));
587 memcpy(blitter->saved_window_rectangles, rects,
588 sizeof(*rects) * num_rectangles);
589 }
590 }
591
592 void util_blitter_common_clear_setup(struct blitter_context *blitter,
593 unsigned width, unsigned height,
594 unsigned clear_buffers,
595 void *custom_blend, void *custom_dsa);
596
597 void util_blitter_set_running_flag(struct blitter_context *blitter);
598 void util_blitter_unset_running_flag(struct blitter_context *blitter);
599
600 void util_blitter_restore_vertex_states(struct blitter_context *blitter);
601 void util_blitter_restore_fragment_states(struct blitter_context *blitter);
602 void util_blitter_restore_render_cond(struct blitter_context *blitter);
603 void util_blitter_restore_fb_state(struct blitter_context *blitter);
604 void util_blitter_restore_textures(struct blitter_context *blitter);
605 void util_blitter_restore_constant_buffer_state(struct blitter_context *blitter);
606
607 /* These are supported combinations of blits from ZS to color and vice versa.
608 * The blitter will do the packing/unpacking of depth and stencil
609 * in the fragment shader.
610 */
611 static inline enum pipe_format
util_blitter_get_color_format_for_zs(enum pipe_format format)612 util_blitter_get_color_format_for_zs(enum pipe_format format)
613 {
614 switch (format) {
615 case PIPE_FORMAT_Z16_UNORM:
616 return PIPE_FORMAT_R16_UNORM;
617
618 case PIPE_FORMAT_Z32_FLOAT:
619 return PIPE_FORMAT_R32_FLOAT;
620
621 case PIPE_FORMAT_Z24_UNORM_S8_UINT:
622 case PIPE_FORMAT_Z24X8_UNORM:
623 case PIPE_FORMAT_S8_UINT_Z24_UNORM:
624 case PIPE_FORMAT_X8Z24_UNORM:
625 return PIPE_FORMAT_R32_UINT;
626
627 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
628 return PIPE_FORMAT_R32G32_UINT;
629
630 case PIPE_FORMAT_Z32_UNORM:
631 default:
632 assert(0);
633 }
634 return PIPE_FORMAT_NONE;
635 }
636
637 #ifdef __cplusplus
638 }
639 #endif
640
641 #endif
642