sp_state_sampler.c revision 25a42f39e362322dbac836c29b76b3104bbfe6f4 
1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28/* Authors:
29 *  Brian Paul
30 */
31
32#include "util/u_memory.h"
33#include "util/u_inlines.h"
34
35#include "draw/draw_context.h"
36
37#include "sp_context.h"
38#include "sp_state.h"
39#include "sp_texture.h"
40#include "sp_tex_sample.h"
41#include "sp_tex_tile_cache.h"
42
43
44struct sp_sampler {
45   struct pipe_sampler_state base;
46   struct sp_sampler_variant *variants;
47   struct sp_sampler_variant *current;
48};
49
50static struct sp_sampler *sp_sampler( struct pipe_sampler_state *sampler )
51{
52   return (struct sp_sampler *)sampler;
53}
54
55
56static void *
57softpipe_create_sampler_state(struct pipe_context *pipe,
58                              const struct pipe_sampler_state *sampler)
59{
60   struct sp_sampler *sp_sampler = CALLOC_STRUCT(sp_sampler);
61
62   sp_sampler->base = *sampler;
63   sp_sampler->variants = NULL;
64
65   return (void *)sp_sampler;
66}
67
68
69/**
70 * Bind a range [start, start+num-1] of samplers for a shader stage.
71 */
72static void
73softpipe_bind_sampler_states(struct pipe_context *pipe,
74                             unsigned shader,
75                             unsigned start,
76                             unsigned num,
77                             void **samplers)
78{
79   struct softpipe_context *softpipe = softpipe_context(pipe);
80   unsigned i;
81
82   assert(shader < PIPE_SHADER_TYPES);
83   assert(start + num <= Elements(softpipe->samplers[shader]));
84
85   /* Check for no-op */
86   if (start + num <= softpipe->num_samplers[shader] &&
87       !memcmp(softpipe->samplers[shader] + start, samplers,
88               num * sizeof(void *))) {
89      return;
90   }
91
92   draw_flush(softpipe->draw);
93
94   /* set the new samplers */
95   for (i = 0; i < num; i++) {
96      softpipe->samplers[shader][start + i] = samplers[i];
97   }
98
99   /* find highest non-null samplers[] entry */
100   {
101      unsigned j = MAX2(softpipe->num_samplers[shader], start + num);
102      while (j > 0 && softpipe->samplers[shader][j - 1] == NULL)
103         j--;
104      softpipe->num_samplers[shader] = j;
105   }
106
107   if (shader == PIPE_SHADER_VERTEX || shader == PIPE_SHADER_GEOMETRY) {
108      draw_set_samplers(softpipe->draw,
109                        shader,
110                        softpipe->samplers[shader],
111                        softpipe->num_samplers[shader]);
112   }
113
114   softpipe->dirty |= SP_NEW_SAMPLER;
115}
116
117
118
119static void
120softpipe_bind_fragment_sampler_states(struct pipe_context *pipe,
121                                      unsigned num, void **samplers)
122{
123   softpipe_bind_sampler_states(pipe, PIPE_SHADER_FRAGMENT, 0, num, samplers);
124}
125
126
127static void
128softpipe_bind_vertex_sampler_states(struct pipe_context *pipe,
129                                    unsigned num,
130                                    void **samplers)
131{
132   softpipe_bind_sampler_states(pipe, PIPE_SHADER_VERTEX, 0, num, samplers);
133}
134
135
136static void
137softpipe_bind_geometry_sampler_states(struct pipe_context *pipe,
138                                      unsigned num,
139                                      void **samplers)
140{
141   softpipe_bind_sampler_states(pipe, PIPE_SHADER_GEOMETRY, 0, num, samplers);
142}
143
144
145static struct pipe_sampler_view *
146softpipe_create_sampler_view(struct pipe_context *pipe,
147                             struct pipe_resource *resource,
148                             const struct pipe_sampler_view *templ)
149{
150   struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
151
152   if (view) {
153      *view = *templ;
154      view->reference.count = 1;
155      view->texture = NULL;
156      pipe_resource_reference(&view->texture, resource);
157      view->context = pipe;
158   }
159
160   return view;
161}
162
163
164static void
165softpipe_sampler_view_destroy(struct pipe_context *pipe,
166                              struct pipe_sampler_view *view)
167{
168   pipe_resource_reference(&view->texture, NULL);
169   FREE(view);
170}
171
172
173static void
174softpipe_set_sampler_views(struct pipe_context *pipe,
175                           unsigned shader,
176                           unsigned start,
177                           unsigned num,
178                           struct pipe_sampler_view **views)
179{
180   struct softpipe_context *softpipe = softpipe_context(pipe);
181   uint i;
182
183   assert(shader < PIPE_SHADER_TYPES);
184   assert(start + num <= Elements(softpipe->sampler_views[shader]));
185
186   /* Check for no-op */
187   if (start + num <= softpipe->num_sampler_views[shader] &&
188       !memcmp(softpipe->sampler_views[shader] + start, views,
189               num * sizeof(struct pipe_sampler_view *))) {
190      return;
191   }
192
193   draw_flush(softpipe->draw);
194
195   /* set the new sampler views */
196   for (i = 0; i < num; i++) {
197      pipe_sampler_view_reference(&softpipe->sampler_views[shader][start + i],
198                                  views[i]);
199      sp_tex_tile_cache_set_sampler_view(softpipe->tex_cache[shader][start + i],
200                                         views[i]);
201   }
202
203   /* find highest non-null sampler_views[] entry */
204   {
205      unsigned j = MAX2(softpipe->num_sampler_views[shader], start + num);
206      while (j > 0 && softpipe->sampler_views[shader][j - 1] == NULL)
207         j--;
208      softpipe->num_sampler_views[shader] = j;
209   }
210
211   if (shader == PIPE_SHADER_VERTEX || shader == PIPE_SHADER_GEOMETRY) {
212      draw_set_sampler_views(softpipe->draw,
213                             shader,
214                             softpipe->sampler_views[shader],
215                             softpipe->num_sampler_views[shader]);
216   }
217
218   softpipe->dirty |= SP_NEW_TEXTURE;
219}
220
221
222static void
223softpipe_set_fragment_sampler_views(struct pipe_context *pipe,
224                                    unsigned num,
225                                    struct pipe_sampler_view **views)
226{
227   softpipe_set_sampler_views(pipe, PIPE_SHADER_FRAGMENT, 0, num, views);
228}
229
230
231static void
232softpipe_set_vertex_sampler_views(struct pipe_context *pipe,
233                                  unsigned num,
234                                  struct pipe_sampler_view **views)
235{
236   softpipe_set_sampler_views(pipe, PIPE_SHADER_VERTEX, 0, num, views);
237}
238
239
240static void
241softpipe_set_geometry_sampler_views(struct pipe_context *pipe,
242                                    unsigned num,
243                                    struct pipe_sampler_view **views)
244{
245   softpipe_set_sampler_views(pipe, PIPE_SHADER_GEOMETRY, 0, num, views);
246}
247
248
249/**
250 * Find/create an sp_sampler_variant object for sampling the given texture,
251 * sampler and tex unit.
252 *
253 * Note that the tex unit is significant.  We can't re-use a sampler
254 * variant for multiple texture units because the sampler variant contains
255 * the texture object pointer.  If the texture object pointer were stored
256 * somewhere outside the sampler variant, we could re-use samplers for
257 * multiple texture units.
258 */
259static struct sp_sampler_variant *
260get_sampler_variant( unsigned unit,
261                     struct sp_sampler *sampler,
262                     struct pipe_sampler_view *view,
263                     unsigned processor )
264{
265   struct softpipe_resource *sp_texture = softpipe_resource(view->texture);
266   struct sp_sampler_variant *v = NULL;
267   union sp_sampler_key key;
268
269   /* if this fails, widen the key.unit field and update this assertion */
270   assert(PIPE_MAX_SAMPLERS <= 16);
271
272   key.bits.target = sp_texture->base.target;
273   key.bits.is_pot = sp_texture->pot;
274   key.bits.processor = processor;
275   key.bits.unit = unit;
276   key.bits.swizzle_r = view->swizzle_r;
277   key.bits.swizzle_g = view->swizzle_g;
278   key.bits.swizzle_b = view->swizzle_b;
279   key.bits.swizzle_a = view->swizzle_a;
280   key.bits.pad = 0;
281
282   if (sampler->current &&
283       key.value == sampler->current->key.value) {
284      v = sampler->current;
285   }
286
287   if (v == NULL) {
288      for (v = sampler->variants; v; v = v->next)
289         if (v->key.value == key.value)
290            break;
291
292      if (v == NULL) {
293         v = sp_create_sampler_variant( &sampler->base, key );
294         v->next = sampler->variants;
295         sampler->variants = v;
296      }
297   }
298
299   sampler->current = v;
300   return v;
301}
302
303
304/**
305 * Reset the sampler variants for a shader stage (vert, frag, geom).
306 */
307static void
308reset_sampler_variants(struct softpipe_context *softpipe,
309                       unsigned shader,
310                       unsigned tgsi_shader,
311                       int max_sampler)
312{
313   int i;
314
315   for (i = 0; i <= max_sampler; i++) {
316      if (softpipe->samplers[shader][i]) {
317         softpipe->tgsi.samplers_list[shader][i] =
318            get_sampler_variant(i,
319                                sp_sampler(softpipe->samplers[shader][i]),
320                                softpipe->sampler_views[shader][i],
321                                tgsi_shader);
322
323         sp_sampler_variant_bind_view(softpipe->tgsi.samplers_list[shader][i],
324                                      softpipe->tex_cache[shader][i],
325                                      softpipe->sampler_views[shader][i]);
326      }
327   }
328}
329
330
331void
332softpipe_reset_sampler_variants(struct softpipe_context *softpipe)
333{
334   /* It's a bit hard to build these samplers ahead of time -- don't
335    * really know which samplers are going to be used for vertex and
336    * fragment programs.
337    */
338
339   /* XXX note: PIPE_SHADER_x != TGSI_PROCESSOR_x (fix that someday) */
340   reset_sampler_variants(softpipe,
341                          PIPE_SHADER_VERTEX,
342                          TGSI_PROCESSOR_VERTEX,
343                          softpipe->vs->max_sampler);
344
345   reset_sampler_variants(softpipe,
346                          PIPE_SHADER_FRAGMENT,
347                          TGSI_PROCESSOR_FRAGMENT,
348                          softpipe->fs_variant->info.file_max[TGSI_FILE_SAMPLER]);
349
350   if (softpipe->gs) {
351      reset_sampler_variants(softpipe,
352                             PIPE_SHADER_GEOMETRY,
353                             TGSI_PROCESSOR_GEOMETRY,
354                             softpipe->gs->max_sampler);
355   }
356}
357
358
359static void
360softpipe_delete_sampler_state(struct pipe_context *pipe,
361                              void *sampler)
362{
363   struct sp_sampler *sp_sampler = (struct sp_sampler *)sampler;
364   struct sp_sampler_variant *v, *tmp;
365
366   for (v = sp_sampler->variants; v; v = tmp) {
367      tmp = v->next;
368      sp_sampler_variant_destroy(v);
369   }
370
371   FREE( sampler );
372}
373
374
375void
376softpipe_init_sampler_funcs(struct pipe_context *pipe)
377{
378   pipe->create_sampler_state = softpipe_create_sampler_state;
379   pipe->bind_fragment_sampler_states  = softpipe_bind_fragment_sampler_states;
380   pipe->bind_vertex_sampler_states = softpipe_bind_vertex_sampler_states;
381   pipe->bind_geometry_sampler_states = softpipe_bind_geometry_sampler_states;
382   pipe->delete_sampler_state = softpipe_delete_sampler_state;
383
384   pipe->set_fragment_sampler_views = softpipe_set_fragment_sampler_views;
385   pipe->set_vertex_sampler_views = softpipe_set_vertex_sampler_views;
386   pipe->set_geometry_sampler_views = softpipe_set_geometry_sampler_views;
387
388   pipe->create_sampler_view = softpipe_create_sampler_view;
389   pipe->sampler_view_destroy = softpipe_sampler_view_destroy;
390}
391
392