svga_pipe_sampler.c revision c50fe2c55cfe9c858b7b7859da79edb0693ee8bd 
1/**********************************************************
2 * Copyright 2008-2009 VMware, Inc.  All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 **********************************************************/
25
26#include "pipe/p_inlines.h"
27#include "pipe/p_defines.h"
28#include "util/u_math.h"
29#include "util/u_memory.h"
30#include "util/u_pack_color.h"
31#include "tgsi/tgsi_parse.h"
32
33#include "svga_context.h"
34#include "svga_screen_texture.h"
35
36#include "svga_debug.h"
37
38static INLINE unsigned
39translate_wrap_mode(unsigned wrap)
40{
41   switch (wrap) {
42   case PIPE_TEX_WRAP_REPEAT:
43      return SVGA3D_TEX_ADDRESS_WRAP;
44
45   case PIPE_TEX_WRAP_CLAMP:
46      return SVGA3D_TEX_ADDRESS_CLAMP;
47
48   case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
49      /* Unfortunately SVGA3D_TEX_ADDRESS_EDGE not respected by
50       * hardware.
51       */
52      return SVGA3D_TEX_ADDRESS_CLAMP;
53
54   case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
55      return SVGA3D_TEX_ADDRESS_BORDER;
56
57   case PIPE_TEX_WRAP_MIRROR_REPEAT:
58      return SVGA3D_TEX_ADDRESS_MIRROR;
59
60   case PIPE_TEX_WRAP_MIRROR_CLAMP:
61   case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
62   case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
63      return SVGA3D_TEX_ADDRESS_MIRRORONCE;
64
65   default:
66      assert(0);
67      return SVGA3D_TEX_ADDRESS_WRAP;
68   }
69}
70
71static INLINE unsigned translate_img_filter( unsigned filter )
72{
73   switch (filter) {
74   case PIPE_TEX_FILTER_NEAREST: return SVGA3D_TEX_FILTER_NEAREST;
75   case PIPE_TEX_FILTER_LINEAR:  return SVGA3D_TEX_FILTER_LINEAR;
76   case PIPE_TEX_FILTER_ANISO:   return SVGA3D_TEX_FILTER_ANISOTROPIC;
77   default:
78      assert(0);
79      return SVGA3D_TEX_FILTER_NEAREST;
80   }
81}
82
83static INLINE unsigned translate_mip_filter( unsigned filter )
84{
85   switch (filter) {
86   case PIPE_TEX_MIPFILTER_NONE:    return SVGA3D_TEX_FILTER_NONE;
87   case PIPE_TEX_MIPFILTER_NEAREST: return SVGA3D_TEX_FILTER_NEAREST;
88   case PIPE_TEX_MIPFILTER_LINEAR:  return SVGA3D_TEX_FILTER_LINEAR;
89   default:
90      assert(0);
91      return SVGA3D_TEX_FILTER_NONE;
92   }
93}
94
95static void *
96svga_create_sampler_state(struct pipe_context *pipe,
97                          const struct pipe_sampler_state *sampler)
98{
99   struct svga_context *svga = svga_context(pipe);
100   struct svga_sampler_state *cso = CALLOC_STRUCT( svga_sampler_state );
101
102   cso->mipfilter = translate_mip_filter(sampler->min_mip_filter);
103   cso->magfilter = translate_img_filter( sampler->mag_img_filter );
104   cso->minfilter = translate_img_filter( sampler->min_img_filter );
105   cso->aniso_level = MAX2( (unsigned) sampler->max_anisotropy, 1 );
106   cso->lod_bias = sampler->lod_bias;
107   cso->addressu = translate_wrap_mode(sampler->wrap_s);
108   cso->addressv = translate_wrap_mode(sampler->wrap_t);
109   cso->addressw = translate_wrap_mode(sampler->wrap_r);
110   cso->normalized_coords = sampler->normalized_coords;
111   cso->compare_mode = sampler->compare_mode;
112   cso->compare_func = sampler->compare_func;
113
114   {
115      ubyte r = float_to_ubyte(sampler->border_color[0]);
116      ubyte g = float_to_ubyte(sampler->border_color[1]);
117      ubyte b = float_to_ubyte(sampler->border_color[2]);
118      ubyte a = float_to_ubyte(sampler->border_color[3]);
119
120      util_pack_color_ub( r, g, b, a,
121                          PIPE_FORMAT_B8G8R8A8_UNORM,
122                          &cso->bordercolor );
123   }
124
125   /* No SVGA3D support for:
126    *    - min/max LOD clamping
127    */
128   cso->min_lod = 0;
129   cso->view_min_lod = MAX2(sampler->min_lod, 0);
130   cso->view_max_lod = MAX2(sampler->max_lod, 0);
131
132   /* Use min_mipmap */
133   if (svga->debug.use_min_mipmap) {
134      if (cso->view_min_lod == cso->view_max_lod) {
135         cso->min_lod = cso->view_min_lod;
136         cso->view_min_lod = 0;
137         cso->view_max_lod = 1000; /* Just a high number */
138         cso->mipfilter = SVGA3D_TEX_FILTER_NONE;
139      }
140   }
141
142   SVGA_DBG(DEBUG_VIEWS, "min %u, view(min %u, max %u) lod, mipfilter %s\n",
143            cso->min_lod, cso->view_min_lod, cso->view_max_lod,
144            cso->mipfilter == SVGA3D_TEX_FILTER_NONE ? "SVGA3D_TEX_FILTER_NONE" : "SOMETHING");
145
146   return cso;
147}
148
149static void svga_bind_sampler_states(struct pipe_context *pipe,
150                                     unsigned num, void **sampler)
151{
152   struct svga_context *svga = svga_context(pipe);
153   unsigned i;
154
155   assert(num <= PIPE_MAX_SAMPLERS);
156
157   /* Check for no-op */
158   if (num == svga->curr.num_samplers &&
159       !memcmp(svga->curr.sampler, sampler, num * sizeof(void *))) {
160      debug_printf("sampler noop\n");
161      return;
162   }
163
164   for (i = 0; i < num; i++)
165      svga->curr.sampler[i] = sampler[i];
166
167   for (i = num; i < svga->curr.num_samplers; i++)
168      svga->curr.sampler[i] = NULL;
169
170   svga->curr.num_samplers = num;
171   svga->dirty |= SVGA_NEW_SAMPLER;
172}
173
174static void svga_delete_sampler_state(struct pipe_context *pipe,
175                                      void *sampler)
176{
177   FREE(sampler);
178}
179
180
181static void svga_set_sampler_textures(struct pipe_context *pipe,
182                                      unsigned num,
183                                      struct pipe_texture **texture)
184{
185   struct svga_context *svga = svga_context(pipe);
186   unsigned flag_1d = 0;
187   unsigned flag_srgb = 0;
188   uint i;
189
190   assert(num <= PIPE_MAX_SAMPLERS);
191
192   /* Check for no-op */
193   if (num == svga->curr.num_textures &&
194       !memcmp(svga->curr.texture, texture, num * sizeof(struct pipe_texture *))) {
195      if (0) debug_printf("texture noop\n");
196      return;
197   }
198
199   for (i = 0; i < num; i++) {
200      pipe_texture_reference(&svga->curr.texture[i],
201                             texture[i]);
202
203      if (!texture[i])
204         continue;
205
206      if (texture[i]->format == PIPE_FORMAT_A8R8G8B8_SRGB)
207         flag_srgb |= 1 << i;
208
209      if (texture[i]->target == PIPE_TEXTURE_1D)
210         flag_1d |= 1 << i;
211   }
212
213   for (i = num; i < svga->curr.num_textures; i++)
214      pipe_texture_reference(&svga->curr.texture[i],
215                             NULL);
216
217   svga->curr.num_textures = num;
218   svga->dirty |= SVGA_NEW_TEXTURE_BINDING;
219
220   if (flag_srgb != svga->curr.tex_flags.flag_srgb ||
221       flag_1d != svga->curr.tex_flags.flag_1d)
222   {
223      svga->dirty |= SVGA_NEW_TEXTURE_FLAGS;
224      svga->curr.tex_flags.flag_1d = flag_1d;
225      svga->curr.tex_flags.flag_srgb = flag_srgb;
226   }
227}
228
229
230
231void svga_init_sampler_functions( struct svga_context *svga )
232{
233   svga->pipe.create_sampler_state = svga_create_sampler_state;
234   svga->pipe.bind_sampler_states = svga_bind_sampler_states;
235   svga->pipe.delete_sampler_state = svga_delete_sampler_state;
236   svga->pipe.set_sampler_textures = svga_set_sampler_textures;
237}
238
239
240
241