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 saved_num_vb;
133 struct pipe_vertex_buffer saved_vertex_buffers[PIPE_MAX_ATTRIBS];
134
135 unsigned saved_num_so_targets;
136 enum mesa_prim saved_so_output_prim;
137 struct pipe_stream_output_target *saved_so_targets[PIPE_MAX_SO_BUFFERS];
138
139 struct pipe_query *saved_render_cond_query;
140 enum pipe_render_cond_flag saved_render_cond_mode;
141 bool saved_render_cond_cond;
142
143 bool saved_window_rectangles_include;
144 unsigned saved_num_window_rectangles;
145 struct pipe_scissor_state saved_window_rectangles[PIPE_MAX_WINDOW_RECTANGLES];
146 };
147
148 /**
149 * Create a blitter context.
150 */
151 struct blitter_context *util_blitter_create(struct pipe_context *pipe);
152
153 /**
154 * Destroy a blitter context.
155 */
156 void util_blitter_destroy(struct blitter_context *blitter);
157
158 void util_blitter_cache_all_shaders(struct blitter_context *blitter);
159 void *util_blitter_get_noop_blend_state(struct blitter_context *blitter);
160 void *util_blitter_get_noop_dsa_state(struct blitter_context *blitter);
161 void *util_blitter_get_discard_rasterizer_state(struct blitter_context *blitter);
162
163
164 /**
165 * Return the pipe context associated with a blitter context.
166 */
167 static inline
util_blitter_get_pipe(struct blitter_context * blitter)168 struct pipe_context *util_blitter_get_pipe(struct blitter_context *blitter)
169 {
170 return blitter->pipe;
171 }
172
173 /**
174 * Override pipe_caps.texture_multisample as reported by the driver.
175 */
176 void util_blitter_set_texture_multisample(struct blitter_context *blitter,
177 bool supported);
178
179 /* The default function to draw a rectangle. This can only be used
180 * inside of the draw_rectangle callback if the driver overrides it. */
181 void util_blitter_draw_rectangle(struct blitter_context *blitter,
182 void *vertex_elements_cso,
183 blitter_get_vs_func get_vs,
184 int x1, int y1, int x2, int y2,
185 float depth, unsigned num_instances,
186 enum blitter_attrib_type type,
187 const union blitter_attrib *attrib);
188
189
190 /*
191 * These states must be saved before any of the following functions are called:
192 * - vertex buffers
193 * - vertex elements
194 * - vertex shader
195 * - geometry shader (if supported)
196 * - stream output targets (if supported)
197 * - rasterizer state
198 */
199
200 /**
201 * Clear a specified set of currently bound buffers to specified values.
202 *
203 * These states must be saved in the blitter in addition to the state objects
204 * already required to be saved:
205 * - fragment shader
206 * - depth stencil alpha state
207 * - blend state
208 */
209 void util_blitter_clear(struct blitter_context *blitter,
210 unsigned width, unsigned height, unsigned num_layers,
211 unsigned clear_buffers,
212 const union pipe_color_union *color,
213 double depth, unsigned stencil,
214 bool msaa);
215
216 /**
217 * Check if the blitter (with the help of the driver) can blit between
218 * the two resources.
219 */
220 bool util_blitter_is_copy_supported(struct blitter_context *blitter,
221 const struct pipe_resource *dst,
222 const struct pipe_resource *src);
223
224 bool util_blitter_is_blit_supported(struct blitter_context *blitter,
225 const struct pipe_blit_info *info);
226
227 /**
228 * Copy a block of pixels from one surface to another.
229 *
230 * These states must be saved in the blitter in addition to the state objects
231 * already required to be saved:
232 * - fragment shader
233 * - depth stencil alpha state
234 * - blend state
235 * - fragment sampler states
236 * - fragment sampler textures
237 * - framebuffer state
238 * - sample mask
239 */
240 void util_blitter_copy_texture(struct blitter_context *blitter,
241 struct pipe_resource *dst,
242 unsigned dst_level,
243 unsigned dstx, unsigned dsty, unsigned dstz,
244 struct pipe_resource *src,
245 unsigned src_level,
246 const struct pipe_box *srcbox);
247
248 /**
249 * This is a generic implementation of pipe->blit, which accepts
250 * sampler/surface views instead of resources.
251 *
252 * The layer and mipmap level are specified by the views.
253 *
254 * Drivers can use this to change resource properties (like format, width,
255 * height) by changing how the views interpret them, instead of changing
256 * pipe_resource directly. This is used to blit resources of formats which
257 * are not renderable.
258 *
259 * src_width0 and src_height0 are sampler_view-private properties that
260 * override pipe_resource. The blitter uses them for computation of texture
261 * coordinates. The dst dimensions are supplied through pipe_surface::width
262 * and height.
263 *
264 * The mask is a combination of the PIPE_MASK_* flags.
265 * Set to PIPE_MASK_RGBAZS if unsure.
266 */
267 void util_blitter_blit_generic(struct blitter_context *blitter,
268 struct pipe_surface *dst,
269 const struct pipe_box *dstbox,
270 struct pipe_sampler_view *src,
271 const struct pipe_box *srcbox,
272 unsigned src_width0, unsigned src_height0,
273 unsigned mask, unsigned filter,
274 const struct pipe_scissor_state *scissor,
275 bool alpha_blend, bool sample0_only,
276 unsigned dst_sample,
277 void *fs_override);
278
279 void util_blitter_blit(struct blitter_context *blitter,
280 const struct pipe_blit_info *info,
281 void *fs_override);
282
283 void util_blitter_generate_mipmap(struct blitter_context *blitter,
284 struct pipe_resource *tex,
285 enum pipe_format format,
286 unsigned base_level, unsigned last_level,
287 unsigned first_layer, unsigned last_layer);
288
289 /**
290 * Helper function to initialize a view for copy_texture_view.
291 * The parameters must match copy_texture_view.
292 */
293 void util_blitter_default_dst_texture(struct pipe_surface *dst_templ,
294 struct pipe_resource *dst,
295 unsigned dstlevel,
296 unsigned dstz);
297
298 /**
299 * Helper function to initialize a view for copy_texture_view.
300 * The parameters must match copy_texture_view.
301 */
302 void util_blitter_default_src_texture(struct blitter_context *blitter,
303 struct pipe_sampler_view *src_templ,
304 struct pipe_resource *src,
305 unsigned srclevel);
306
307 /**
308 * Clear the contents of a buffer using the Stream Output functionality.
309 * 4-byte alignment is required.
310 *
311 * "num_channels" can be 1, 2, 3, or 4, and specifies if the clear value is
312 * R, RG, RGB, or RGBA.
313 *
314 * For each element, only "num_channels" components of "clear_value" are
315 * copied to the buffer, then the offset is incremented by num_channels*4.
316 */
317 void util_blitter_clear_buffer(struct blitter_context *blitter,
318 struct pipe_resource *dst,
319 unsigned offset, unsigned size,
320 unsigned num_channels,
321 const union pipe_color_union *clear_value);
322
323 /**
324 * Clear a region of a (color) surface to a constant value.
325 *
326 * These states must be saved in the blitter in addition to the state objects
327 * already required to be saved:
328 * - fragment shader
329 * - depth stencil alpha state
330 * - blend state
331 * - framebuffer state
332 */
333 void util_blitter_clear_render_target(struct blitter_context *blitter,
334 struct pipe_surface *dst,
335 const union pipe_color_union *color,
336 unsigned dstx, unsigned dsty,
337 unsigned width, unsigned height);
338
339 /**
340 * Clear a region of a depth-stencil surface, both stencil and depth
341 * or only one of them if this is a combined depth-stencil surface.
342 *
343 * These states must be saved in the blitter in addition to the state objects
344 * already required to be saved:
345 * - fragment shader
346 * - depth stencil alpha state
347 * - blend state
348 * - framebuffer state
349 */
350 void util_blitter_clear_depth_stencil(struct blitter_context *blitter,
351 struct pipe_surface *dst,
352 unsigned clear_flags,
353 double depth,
354 unsigned stencil,
355 unsigned dstx, unsigned dsty,
356 unsigned width, unsigned height);
357
358 /* The following functions are customized variants of the clear functions.
359 * Some drivers use them internally to do things like MSAA resolve
360 * and resource decompression. It usually consists of rendering a full-screen
361 * quad with a special blend or DSA state.
362 */
363
364 /* Used by r300g for depth decompression. */
365 void util_blitter_custom_clear_depth(struct blitter_context *blitter,
366 unsigned width, unsigned height,
367 double depth, void *custom_dsa);
368
369 /* Used by r600g for depth decompression. */
370 void util_blitter_custom_depth_stencil(struct blitter_context *blitter,
371 struct pipe_surface *zsurf,
372 struct pipe_surface *cbsurf,
373 unsigned sample_mask,
374 void *dsa_stage, float depth);
375
376 /* Used by r600g for color decompression. */
377 void util_blitter_custom_color(struct blitter_context *blitter,
378 struct pipe_surface *dstsurf,
379 void *custom_blend);
380
381 /* Used by r600g for MSAA color resolve. */
382 void util_blitter_custom_resolve_color(struct blitter_context *blitter,
383 struct pipe_resource *dst,
384 unsigned dst_level,
385 unsigned dst_layer,
386 struct pipe_resource *src,
387 unsigned src_layer,
388 unsigned sampled_mask,
389 void *custom_blend,
390 enum pipe_format format);
391
392 /* Used by vc4 for 8/16-bit linear-to-tiled blits */
393 void util_blitter_custom_shader(struct blitter_context *blitter,
394 struct pipe_surface *dstsurf,
395 void *custom_vs, void *custom_fs);
396
397 /* Used by D3D12 for non-MSAA -> MSAA stencil blits */
398 void util_blitter_stencil_fallback(struct blitter_context *blitter,
399 struct pipe_resource *dst,
400 unsigned dst_level,
401 const struct pipe_box *dstbox,
402 struct pipe_resource *src,
403 unsigned src_level,
404 const struct pipe_box *srcbox,
405 const struct pipe_scissor_state *scissor);
406
407 /* The functions below should be used to save currently bound constant state
408 * objects inside a driver. The objects are automatically restored at the end
409 * of the util_blitter_{clear, copy_region, fill_region} functions and then
410 * forgotten.
411 *
412 * States not listed here are not affected by util_blitter. */
413
414 static inline void
util_blitter_save_blend(struct blitter_context * blitter,void * state)415 util_blitter_save_blend(struct blitter_context *blitter, void *state)
416 {
417 blitter->saved_blend_state = state;
418 }
419
420 static inline void
util_blitter_save_depth_stencil_alpha(struct blitter_context * blitter,void * state)421 util_blitter_save_depth_stencil_alpha(struct blitter_context *blitter,
422 void *state)
423 {
424 blitter->saved_dsa_state = state;
425 }
426
427 static inline void
util_blitter_save_vertex_elements(struct blitter_context * blitter,void * state)428 util_blitter_save_vertex_elements(struct blitter_context *blitter, void *state)
429 {
430 blitter->saved_velem_state = state;
431 }
432
433 static inline void
util_blitter_save_stencil_ref(struct blitter_context * blitter,const struct pipe_stencil_ref * state)434 util_blitter_save_stencil_ref(struct blitter_context *blitter,
435 const struct pipe_stencil_ref *state)
436 {
437 blitter->saved_stencil_ref = *state;
438 }
439
440 static inline void
util_blitter_save_rasterizer(struct blitter_context * blitter,void * state)441 util_blitter_save_rasterizer(struct blitter_context *blitter, void *state)
442 {
443 blitter->saved_rs_state = state;
444 }
445
446 static inline void
util_blitter_save_fragment_shader(struct blitter_context * blitter,void * fs)447 util_blitter_save_fragment_shader(struct blitter_context *blitter, void *fs)
448 {
449 blitter->saved_fs = fs;
450 }
451
452 static inline void
util_blitter_save_vertex_shader(struct blitter_context * blitter,void * vs)453 util_blitter_save_vertex_shader(struct blitter_context *blitter, void *vs)
454 {
455 blitter->saved_vs = vs;
456 }
457
458 static inline void
util_blitter_save_geometry_shader(struct blitter_context * blitter,void * gs)459 util_blitter_save_geometry_shader(struct blitter_context *blitter, void *gs)
460 {
461 blitter->saved_gs = gs;
462 }
463
464 static inline void
util_blitter_save_tessctrl_shader(struct blitter_context * blitter,void * sh)465 util_blitter_save_tessctrl_shader(struct blitter_context *blitter,
466 void *sh)
467 {
468 blitter->saved_tcs = sh;
469 }
470
471 static inline void
util_blitter_save_tesseval_shader(struct blitter_context * blitter,void * sh)472 util_blitter_save_tesseval_shader(struct blitter_context *blitter,
473 void *sh)
474 {
475 blitter->saved_tes = sh;
476 }
477
478 static inline void
util_blitter_save_framebuffer(struct blitter_context * blitter,const struct pipe_framebuffer_state * state)479 util_blitter_save_framebuffer(struct blitter_context *blitter,
480 const struct pipe_framebuffer_state *state)
481 {
482 blitter->saved_fb_state.nr_cbufs = 0; /* It's ~0 now, meaning it's unsaved. */
483 util_copy_framebuffer_state(&blitter->saved_fb_state, state);
484 }
485
486 static inline void
util_blitter_save_viewport(struct blitter_context * blitter,struct pipe_viewport_state * state)487 util_blitter_save_viewport(struct blitter_context *blitter,
488 struct pipe_viewport_state *state)
489 {
490 blitter->saved_viewport = *state;
491 }
492
493 static inline void
util_blitter_save_scissor(struct blitter_context * blitter,struct pipe_scissor_state * state)494 util_blitter_save_scissor(struct blitter_context *blitter,
495 struct pipe_scissor_state *state)
496 {
497 blitter->saved_scissor = *state;
498 }
499
500 static inline void
util_blitter_save_fragment_sampler_states(struct blitter_context * blitter,unsigned num_sampler_states,void ** sampler_states)501 util_blitter_save_fragment_sampler_states(
502 struct blitter_context *blitter,
503 unsigned num_sampler_states,
504 void **sampler_states)
505 {
506 assert(num_sampler_states <= ARRAY_SIZE(blitter->saved_sampler_states));
507
508 blitter->saved_num_sampler_states = num_sampler_states;
509 memcpy(blitter->saved_sampler_states, sampler_states,
510 num_sampler_states * sizeof(void *));
511 }
512
513 static inline void
util_blitter_save_fragment_sampler_views(struct blitter_context * blitter,unsigned num_views,struct pipe_sampler_view ** views)514 util_blitter_save_fragment_sampler_views(struct blitter_context *blitter,
515 unsigned num_views,
516 struct pipe_sampler_view **views)
517 {
518 unsigned i;
519 assert(num_views <= ARRAY_SIZE(blitter->saved_sampler_views));
520
521 blitter->saved_num_sampler_views = num_views;
522 for (i = 0; i < num_views; i++)
523 pipe_sampler_view_reference(&blitter->saved_sampler_views[i],
524 views[i]);
525 }
526
527 static inline void
util_blitter_save_fragment_constant_buffer_slot(struct blitter_context * blitter,struct pipe_constant_buffer * constant_buffers)528 util_blitter_save_fragment_constant_buffer_slot(
529 struct blitter_context *blitter,
530 struct pipe_constant_buffer *constant_buffers)
531 {
532 pipe_resource_reference(&blitter->saved_fs_constant_buffer.buffer,
533 constant_buffers[blitter->cb_slot].buffer);
534 memcpy(&blitter->saved_fs_constant_buffer, &constant_buffers[blitter->cb_slot],
535 sizeof(struct pipe_constant_buffer));
536 }
537
538 static inline void
util_blitter_save_vertex_buffers(struct blitter_context * blitter,struct pipe_vertex_buffer * vertex_buffers,unsigned count)539 util_blitter_save_vertex_buffers(struct blitter_context *blitter,
540 struct pipe_vertex_buffer *vertex_buffers,
541 unsigned count)
542 {
543 for (unsigned i = 0; i < count; i++) {
544 pipe_vertex_buffer_reference(&blitter->saved_vertex_buffers[i],
545 &vertex_buffers[i]);
546 }
547 blitter->saved_num_vb = count;
548 }
549
550 static inline void
util_blitter_save_so_targets(struct blitter_context * blitter,unsigned num_targets,struct pipe_stream_output_target ** targets,enum mesa_prim output_prim)551 util_blitter_save_so_targets(struct blitter_context *blitter,
552 unsigned num_targets,
553 struct pipe_stream_output_target **targets,
554 enum mesa_prim output_prim)
555 {
556 unsigned i;
557 assert(num_targets <= ARRAY_SIZE(blitter->saved_so_targets));
558
559 blitter->saved_num_so_targets = num_targets;
560 blitter->saved_so_output_prim = output_prim;
561
562 for (i = 0; i < num_targets; i++)
563 pipe_so_target_reference(&blitter->saved_so_targets[i],
564 targets[i]);
565 }
566
567 static inline void
util_blitter_save_sample_mask(struct blitter_context * blitter,unsigned sample_mask,unsigned min_samples)568 util_blitter_save_sample_mask(struct blitter_context *blitter,
569 unsigned sample_mask, unsigned min_samples)
570 {
571 blitter->is_sample_mask_saved = true;
572 blitter->saved_sample_mask = sample_mask;
573 blitter->saved_min_samples = min_samples;
574 }
575
576 static inline void
util_blitter_save_render_condition(struct blitter_context * blitter,struct pipe_query * query,bool condition,enum pipe_render_cond_flag mode)577 util_blitter_save_render_condition(struct blitter_context *blitter,
578 struct pipe_query *query,
579 bool condition,
580 enum pipe_render_cond_flag mode)
581 {
582 blitter->saved_render_cond_query = query;
583 blitter->saved_render_cond_mode = mode;
584 blitter->saved_render_cond_cond = condition;
585 }
586
587 static inline void
util_blitter_save_window_rectangles(struct blitter_context * blitter,bool include,unsigned num_rectangles,const struct pipe_scissor_state * rects)588 util_blitter_save_window_rectangles(struct blitter_context *blitter,
589 bool include,
590 unsigned num_rectangles,
591 const struct pipe_scissor_state *rects)
592 {
593 blitter->saved_window_rectangles_include = include;
594 blitter->saved_num_window_rectangles = num_rectangles;
595 if (num_rectangles > 0) {
596 assert(num_rectangles < ARRAY_SIZE(blitter->saved_window_rectangles));
597 memcpy(blitter->saved_window_rectangles, rects,
598 sizeof(*rects) * num_rectangles);
599 }
600 }
601
602 void util_blitter_common_clear_setup(struct blitter_context *blitter,
603 unsigned width, unsigned height,
604 unsigned clear_buffers,
605 void *custom_blend, void *custom_dsa);
606
607 void util_blitter_set_running_flag(struct blitter_context *blitter);
608 void util_blitter_unset_running_flag(struct blitter_context *blitter);
609
610 void util_blitter_restore_vertex_states(struct blitter_context *blitter);
611 void util_blitter_restore_fragment_states(struct blitter_context *blitter);
612 void util_blitter_restore_render_cond(struct blitter_context *blitter);
613 void util_blitter_restore_fb_state(struct blitter_context *blitter);
614 void util_blitter_restore_textures(struct blitter_context *blitter);
615 void util_blitter_restore_constant_buffer_state(struct blitter_context *blitter);
616
617 /* These are supported combinations of blits from ZS to color and vice versa.
618 * The blitter will do the packing/unpacking of depth and stencil
619 * in the fragment shader.
620 */
621 static inline enum pipe_format
util_blitter_get_color_format_for_zs(enum pipe_format format)622 util_blitter_get_color_format_for_zs(enum pipe_format format)
623 {
624 switch (format) {
625 case PIPE_FORMAT_Z16_UNORM:
626 return PIPE_FORMAT_R16_UNORM;
627
628 case PIPE_FORMAT_Z32_FLOAT:
629 return PIPE_FORMAT_R32_FLOAT;
630
631 case PIPE_FORMAT_Z24_UNORM_S8_UINT:
632 case PIPE_FORMAT_Z24X8_UNORM:
633 case PIPE_FORMAT_S8_UINT_Z24_UNORM:
634 case PIPE_FORMAT_X8Z24_UNORM:
635 return PIPE_FORMAT_R32_UINT;
636
637 case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
638 return PIPE_FORMAT_R32G32_UINT;
639
640 case PIPE_FORMAT_Z32_UNORM:
641 default:
642 assert(0);
643 }
644 return PIPE_FORMAT_NONE;
645 }
646
647 #ifdef __cplusplus
648 }
649 #endif
650
651 #endif
652