sp_state_sampler.c revision df87fb59136eb302d72eac4b58fd8ffb25989ed5 
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
69static void
70softpipe_bind_sampler_states(struct pipe_context *pipe,
71                             unsigned shader, unsigned num, void **sampler)
72{
73   struct softpipe_context *softpipe = softpipe_context(pipe);
74   unsigned i;
75
76   assert(shader < PIPE_SHADER_TYPES);
77   assert(num <= PIPE_MAX_SAMPLERS);
78
79   /* Check for no-op */
80   if (num == softpipe->num_samplers[shader] &&
81       !memcmp(softpipe->samplers[shader], sampler, num * sizeof(void *)))
82      return;
83
84   draw_flush(softpipe->draw);
85
86   for (i = 0; i < num; ++i)
87      softpipe->samplers[shader][i] = sampler[i];
88   for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
89      softpipe->samplers[shader][i] = NULL;
90
91   softpipe->num_samplers[shader] = num;
92
93   if (shader == PIPE_SHADER_VERTEX || shader == PIPE_SHADER_GEOMETRY) {
94      draw_set_samplers(softpipe->draw,
95                        shader,
96                        softpipe->samplers[shader],
97                        softpipe->num_samplers[shader]);
98   }
99
100   softpipe->dirty |= SP_NEW_SAMPLER;
101}
102
103
104
105static void
106softpipe_bind_fragment_sampler_states(struct pipe_context *pipe,
107                                      unsigned num, void **samplers)
108{
109   softpipe_bind_sampler_states(pipe, PIPE_SHADER_FRAGMENT, num, samplers);
110}
111
112
113static void
114softpipe_bind_vertex_sampler_states(struct pipe_context *pipe,
115                                    unsigned num,
116                                    void **samplers)
117{
118   softpipe_bind_sampler_states(pipe, PIPE_SHADER_VERTEX, num, samplers);
119}
120
121
122static void
123softpipe_bind_geometry_sampler_states(struct pipe_context *pipe,
124                                      unsigned num,
125                                      void **samplers)
126{
127   softpipe_bind_sampler_states(pipe, PIPE_SHADER_GEOMETRY, num, samplers);
128}
129
130
131static struct pipe_sampler_view *
132softpipe_create_sampler_view(struct pipe_context *pipe,
133                             struct pipe_resource *resource,
134                             const struct pipe_sampler_view *templ)
135{
136   struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
137
138   if (view) {
139      *view = *templ;
140      view->reference.count = 1;
141      view->texture = NULL;
142      pipe_resource_reference(&view->texture, resource);
143      view->context = pipe;
144   }
145
146   return view;
147}
148
149
150static void
151softpipe_sampler_view_destroy(struct pipe_context *pipe,
152                              struct pipe_sampler_view *view)
153{
154   pipe_resource_reference(&view->texture, NULL);
155   FREE(view);
156}
157
158
159static void
160softpipe_set_sampler_views(struct pipe_context *pipe,
161                           unsigned shader,
162                           unsigned num,
163                           struct pipe_sampler_view **views)
164{
165   struct softpipe_context *softpipe = softpipe_context(pipe);
166   uint i;
167
168   assert(num <= PIPE_MAX_SAMPLERS);
169
170   /* Check for no-op */
171   if (num == softpipe->num_sampler_views[shader] &&
172       !memcmp(softpipe->sampler_views[shader], views,
173               num * sizeof(struct pipe_sampler_view *)))
174      return;
175
176   draw_flush(softpipe->draw);
177
178   for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
179      struct pipe_sampler_view *view = i < num ? views[i] : NULL;
180
181      pipe_sampler_view_reference(&softpipe->sampler_views[shader][i], view);
182      sp_tex_tile_cache_set_sampler_view(softpipe->tex_cache[shader][i], view);
183   }
184
185   softpipe->num_sampler_views[shader] = num;
186
187   if (shader == PIPE_SHADER_VERTEX || shader == PIPE_SHADER_GEOMETRY) {
188      draw_set_sampler_views(softpipe->draw,
189                             shader,
190                             softpipe->sampler_views[shader],
191                             softpipe->num_sampler_views[shader]);
192   }
193
194   softpipe->dirty |= SP_NEW_TEXTURE;
195}
196
197
198static void
199softpipe_set_fragment_sampler_views(struct pipe_context *pipe,
200                                    unsigned num,
201                                    struct pipe_sampler_view **views)
202{
203   softpipe_set_sampler_views(pipe, PIPE_SHADER_FRAGMENT, num, views);
204}
205
206
207static void
208softpipe_set_vertex_sampler_views(struct pipe_context *pipe,
209                                  unsigned num,
210                                  struct pipe_sampler_view **views)
211{
212   softpipe_set_sampler_views(pipe, PIPE_SHADER_VERTEX, num, views);
213}
214
215
216static void
217softpipe_set_geometry_sampler_views(struct pipe_context *pipe,
218                                    unsigned num,
219                                    struct pipe_sampler_view **views)
220{
221   softpipe_set_sampler_views(pipe, PIPE_SHADER_GEOMETRY, num, views);
222}
223
224
225/**
226 * Find/create an sp_sampler_variant object for sampling the given texture,
227 * sampler and tex unit.
228 *
229 * Note that the tex unit is significant.  We can't re-use a sampler
230 * variant for multiple texture units because the sampler variant contains
231 * the texture object pointer.  If the texture object pointer were stored
232 * somewhere outside the sampler variant, we could re-use samplers for
233 * multiple texture units.
234 */
235static struct sp_sampler_variant *
236get_sampler_variant( unsigned unit,
237                     struct sp_sampler *sampler,
238                     struct pipe_sampler_view *view,
239                     unsigned processor )
240{
241   struct softpipe_resource *sp_texture = softpipe_resource(view->texture);
242   struct sp_sampler_variant *v = NULL;
243   union sp_sampler_key key;
244
245   /* if this fails, widen the key.unit field and update this assertion */
246   assert(PIPE_MAX_SAMPLERS <= 16);
247
248   key.bits.target = sp_texture->base.target;
249   key.bits.is_pot = sp_texture->pot;
250   key.bits.processor = processor;
251   key.bits.unit = unit;
252   key.bits.swizzle_r = view->swizzle_r;
253   key.bits.swizzle_g = view->swizzle_g;
254   key.bits.swizzle_b = view->swizzle_b;
255   key.bits.swizzle_a = view->swizzle_a;
256   key.bits.pad = 0;
257
258   if (sampler->current &&
259       key.value == sampler->current->key.value) {
260      v = sampler->current;
261   }
262
263   if (v == NULL) {
264      for (v = sampler->variants; v; v = v->next)
265         if (v->key.value == key.value)
266            break;
267
268      if (v == NULL) {
269         v = sp_create_sampler_variant( &sampler->base, key );
270         v->next = sampler->variants;
271         sampler->variants = v;
272      }
273   }
274
275   sampler->current = v;
276   return v;
277}
278
279
280/**
281 * Reset the sampler variants for a shader stage (vert, frag, geom).
282 */
283static void
284reset_sampler_variants(struct softpipe_context *softpipe,
285                       unsigned shader,
286                       unsigned tgsi_shader,
287                       int max_sampler)
288{
289   int i;
290
291   for (i = 0; i <= max_sampler; i++) {
292      if (softpipe->samplers[shader][i]) {
293         softpipe->tgsi.samplers_list[shader][i] =
294            get_sampler_variant(i,
295                                sp_sampler(softpipe->samplers[shader][i]),
296                                softpipe->sampler_views[shader][i],
297                                tgsi_shader);
298
299         sp_sampler_variant_bind_view(softpipe->tgsi.samplers_list[shader][i],
300                                      softpipe->tex_cache[shader][i],
301                                      softpipe->sampler_views[shader][i]);
302      }
303   }
304}
305
306
307void
308softpipe_reset_sampler_variants(struct softpipe_context *softpipe)
309{
310   /* It's a bit hard to build these samplers ahead of time -- don't
311    * really know which samplers are going to be used for vertex and
312    * fragment programs.
313    */
314
315   /* XXX note: PIPE_SHADER_x != TGSI_PROCESSOR_x (fix that someday) */
316   reset_sampler_variants(softpipe,
317                          PIPE_SHADER_VERTEX,
318                          TGSI_PROCESSOR_VERTEX,
319                          softpipe->vs->max_sampler);
320
321   reset_sampler_variants(softpipe,
322                          PIPE_SHADER_FRAGMENT,
323                          TGSI_PROCESSOR_FRAGMENT,
324                          softpipe->fs_variant->info.file_max[TGSI_FILE_SAMPLER]);
325
326   if (softpipe->gs) {
327      reset_sampler_variants(softpipe,
328                             PIPE_SHADER_GEOMETRY,
329                             TGSI_PROCESSOR_GEOMETRY,
330                             softpipe->gs->max_sampler);
331   }
332}
333
334
335static void
336softpipe_delete_sampler_state(struct pipe_context *pipe,
337                              void *sampler)
338{
339   struct sp_sampler *sp_sampler = (struct sp_sampler *)sampler;
340   struct sp_sampler_variant *v, *tmp;
341
342   for (v = sp_sampler->variants; v; v = tmp) {
343      tmp = v->next;
344      sp_sampler_variant_destroy(v);
345   }
346
347   FREE( sampler );
348}
349
350
351void
352softpipe_init_sampler_funcs(struct pipe_context *pipe)
353{
354   pipe->create_sampler_state = softpipe_create_sampler_state;
355   pipe->bind_fragment_sampler_states  = softpipe_bind_fragment_sampler_states;
356   pipe->bind_vertex_sampler_states = softpipe_bind_vertex_sampler_states;
357   pipe->bind_geometry_sampler_states = softpipe_bind_geometry_sampler_states;
358   pipe->delete_sampler_state = softpipe_delete_sampler_state;
359
360   pipe->set_fragment_sampler_views = softpipe_set_fragment_sampler_views;
361   pipe->set_vertex_sampler_views = softpipe_set_vertex_sampler_views;
362   pipe->set_geometry_sampler_views = softpipe_set_geometry_sampler_views;
363
364   pipe->create_sampler_view = softpipe_create_sampler_view;
365   pipe->sampler_view_destroy = softpipe_sampler_view_destroy;
366}
367
368