st_atom_sampler.c revision c3af68dc5022715cc8f126b7df12f3f5248aefe7 
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 /*
29  * Authors:
30  *   Keith Whitwell <keith@tungstengraphics.com>
31  *   Brian Paul
32  */
33
34
35#include "st_context.h"
36#include "st_cache.h"
37#include "st_atom.h"
38#include "pipe/p_context.h"
39#include "pipe/p_defines.h"
40
41
42/**
43 * Convert GLenum texcoord wrap tokens to pipe tokens.
44 */
45static GLuint
46gl_wrap_to_sp(GLenum wrap)
47{
48   switch (wrap) {
49   case GL_REPEAT:
50      return PIPE_TEX_WRAP_REPEAT;
51   case GL_CLAMP:
52      return PIPE_TEX_WRAP_CLAMP;
53   case GL_CLAMP_TO_EDGE:
54      return PIPE_TEX_WRAP_CLAMP_TO_EDGE;
55   case GL_CLAMP_TO_BORDER:
56      return PIPE_TEX_WRAP_CLAMP_TO_BORDER;
57   case GL_MIRRORED_REPEAT:
58      return PIPE_TEX_WRAP_MIRROR_REPEAT;
59   case GL_MIRROR_CLAMP_EXT:
60      return PIPE_TEX_WRAP_MIRROR_CLAMP;
61   case GL_MIRROR_CLAMP_TO_EDGE_EXT:
62      return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE;
63   case GL_MIRROR_CLAMP_TO_BORDER_EXT:
64      return PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER;
65   default:
66      abort();
67      return 0;
68   }
69}
70
71
72static GLuint
73gl_filter_to_mip_filter(GLenum filter)
74{
75   switch (filter) {
76   case GL_NEAREST:
77   case GL_LINEAR:
78      return PIPE_TEX_MIPFILTER_NONE;
79
80   case GL_NEAREST_MIPMAP_NEAREST:
81   case GL_LINEAR_MIPMAP_NEAREST:
82      return PIPE_TEX_MIPFILTER_NEAREST;
83
84   case GL_NEAREST_MIPMAP_LINEAR:
85   case GL_LINEAR_MIPMAP_LINEAR:
86      return PIPE_TEX_MIPFILTER_LINEAR;
87
88   default:
89      assert(0);
90      return PIPE_TEX_MIPFILTER_NONE;
91   }
92}
93
94
95static GLuint
96gl_filter_to_img_filter(GLenum filter)
97{
98   switch (filter) {
99   case GL_NEAREST:
100   case GL_NEAREST_MIPMAP_NEAREST:
101   case GL_NEAREST_MIPMAP_LINEAR:
102      return PIPE_TEX_FILTER_NEAREST;
103
104   case GL_LINEAR:
105   case GL_LINEAR_MIPMAP_NEAREST:
106   case GL_LINEAR_MIPMAP_LINEAR:
107      return PIPE_TEX_FILTER_LINEAR;
108
109   default:
110      assert(0);
111      return PIPE_TEX_FILTER_NEAREST;
112   }
113}
114
115
116static void
117update_samplers(struct st_context *st)
118{
119   GLuint u;
120
121   for (u = 0; u < st->ctx->Const.MaxTextureImageUnits; u++) {
122      const struct gl_texture_object *texobj
123         = st->ctx->Texture.Unit[u]._Current;
124      struct pipe_sampler_state sampler;
125      const struct cso_sampler *cso;
126
127      memset(&sampler, 0, sizeof(sampler));
128
129      if (texobj) {
130         sampler.wrap_s = gl_wrap_to_sp(texobj->WrapS);
131         sampler.wrap_t = gl_wrap_to_sp(texobj->WrapT);
132         sampler.wrap_r = gl_wrap_to_sp(texobj->WrapR);
133
134         sampler.min_img_filter = gl_filter_to_img_filter(texobj->MinFilter);
135         sampler.min_mip_filter = gl_filter_to_mip_filter(texobj->MinFilter);
136         sampler.mag_img_filter = gl_filter_to_img_filter(texobj->MagFilter);
137
138         if (texobj->Target != GL_TEXTURE_RECTANGLE_ARB)
139            sampler.normalized_coords = 1;
140
141         sampler.lod_bias = st->ctx->Texture.Unit[u].LodBias;
142#if 1
143         sampler.min_lod = texobj->MinLod;
144         sampler.max_lod = texobj->MaxLod;
145#else
146         /* min/max lod should really be as follows (untested).
147          * Also, calculate_first_last_level() needs to be overhauled
148          * since today's hardware had real support for LOD clamping.
149          */
150         sampler.min_lod = MAX2(texobj->BaseLevel, texobj->MinLod);
151         sampler.max_lod = MIN2(texobj->MaxLevel, texobj->MaxLod);
152#endif
153
154	 sampler.max_anisotropy = texobj->MaxAnisotropy;
155
156         /* only care about ARB_shadow, not SGI shadow */
157         if (texobj->CompareMode == GL_COMPARE_R_TO_TEXTURE) {
158            sampler.compare = 1;
159            sampler.compare_mode = PIPE_TEX_COMPARE_R_TO_TEXTURE;
160            sampler.compare_func
161               = st_compare_func_to_pipe(texobj->CompareFunc);
162         }
163
164         /* XXX more sampler state here */
165      }
166
167      cso = st_cached_sampler_state(st, &sampler);
168
169      if (cso != st->state.sampler[u]) {
170         /* state has changed */
171         st->state.sampler[u] = cso;
172         st->pipe->bind_sampler_state(st->pipe, u, cso->data);
173      }
174   }
175}
176
177
178const struct st_tracked_state st_update_sampler = {
179   .name = "st_update_sampler",
180   .dirty = {
181      .mesa = _NEW_TEXTURE,
182      .st  = 0,
183   },
184   .update = update_samplers
185};
186
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191