Fix a silly bug on setting samplers.
[mesa.git] / src / mesa / state_tracker / st_atom_sampler.c
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
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8 * "Software"), to deal in the Software without restriction, including
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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
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24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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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 */
45 static GLuint
46 gl_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
72 static GLuint
73 gl_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
95 static GLuint
96 gl_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
116
117 static void
118 update_samplers(struct st_context *st)
119 {
120 GLuint u;
121
122 for (u = 0; u < st->ctx->Const.MaxTextureImageUnits; u++) {
123 const struct gl_texture_object *texobj
124 = st->ctx->Texture.Unit[u]._Current;
125 struct pipe_sampler_state sampler;
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 sampler.lod_bias = st->ctx->Texture.Unit[u].LodBias;
139 sampler.min_lod = texobj->MinLod;
140 sampler.max_lod = texobj->MaxLod;
141 sampler.max_anisotropy = texobj->MaxAnisotropy;
142
143 /* XXX more sampler state here */
144 }
145
146 const struct pipe_sampler_state *cached_sampler =
147 st_cached_sampler_state(st, &sampler);
148
149 if (cached_sampler != st->state.sampler[u]) {
150 /* state has changed */
151 st->state.sampler[u] = cached_sampler;
152 st->pipe->bind_sampler_state(st->pipe, u, cached_sampler);
153 }
154 }
155 }
156
157
158 const struct st_tracked_state st_update_sampler = {
159 .name = "st_update_sampler",
160 .dirty = {
161 .mesa = _NEW_TEXTURE,
162 .st = 0,
163 },
164 .update = update_samplers
165 };
166
167
168
169
170