1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 2011 VMware, Inc. 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 "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25
26
27 #ifndef SAMPLEROBJ_H
28 #define SAMPLEROBJ_H
29
30 #include "mtypes.h"
31
32 #ifdef __cplusplus
33 extern "C" {
34 #endif
35
36 struct dd_function_table;
37
38 static inline struct gl_sampler_object *
_mesa_get_samplerobj(struct gl_context * ctx,GLuint unit)39 _mesa_get_samplerobj(struct gl_context *ctx, GLuint unit)
40 {
41 if (ctx->Texture.Unit[unit].Sampler)
42 return ctx->Texture.Unit[unit].Sampler;
43 else if (ctx->Texture.Unit[unit]._Current)
44 return &ctx->Texture.Unit[unit]._Current->Sampler;
45 else
46 return NULL;
47 }
48
49
50 /** Does the given filter state do mipmap filtering? */
51 static inline GLboolean
_mesa_is_mipmap_filter(const struct gl_sampler_object * samp)52 _mesa_is_mipmap_filter(const struct gl_sampler_object *samp)
53 {
54 return samp->Attrib.MinFilter != GL_NEAREST && samp->Attrib.MinFilter != GL_LINEAR;
55 }
56
57
58 extern void
59 _mesa_reference_sampler_object_(struct gl_context *ctx,
60 struct gl_sampler_object **ptr,
61 struct gl_sampler_object *samp);
62
63 static inline void
_mesa_reference_sampler_object(struct gl_context * ctx,struct gl_sampler_object ** ptr,struct gl_sampler_object * samp)64 _mesa_reference_sampler_object(struct gl_context *ctx,
65 struct gl_sampler_object **ptr,
66 struct gl_sampler_object *samp)
67 {
68 if (*ptr != samp)
69 _mesa_reference_sampler_object_(ctx, ptr, samp);
70 }
71
72 extern struct gl_sampler_object *
73 _mesa_lookup_samplerobj(struct gl_context *ctx, GLuint name);
74
75 extern struct gl_sampler_object *
76 _mesa_new_sampler_object(struct gl_context *ctx, GLuint name);
77
78 extern void
79 _mesa_init_sampler_object_functions(struct dd_function_table *driver);
80
81 extern void
82 _mesa_set_sampler_wrap(struct gl_context *ctx, struct gl_sampler_object *samp,
83 GLenum s, GLenum t, GLenum r);
84
85 extern void
86 _mesa_set_sampler_filters(struct gl_context *ctx,
87 struct gl_sampler_object *samp,
88 GLenum min_filter, GLenum mag_filter);
89
90 extern void
91 _mesa_set_sampler_srgb_decode(struct gl_context *ctx,
92 struct gl_sampler_object *samp, GLenum param);
93
94 extern void
95 _mesa_bind_sampler(struct gl_context *ctx, GLuint unit,
96 struct gl_sampler_object *sampObj);
97
98 void GLAPIENTRY
99 _mesa_GenSamplers_no_error(GLsizei count, GLuint *samplers);
100
101 void GLAPIENTRY
102 _mesa_GenSamplers(GLsizei count, GLuint *samplers);
103
104 void GLAPIENTRY
105 _mesa_CreateSamplers_no_error(GLsizei count, GLuint *samplers);
106
107 void GLAPIENTRY
108 _mesa_CreateSamplers(GLsizei count, GLuint *samplers);
109
110 void GLAPIENTRY
111 _mesa_DeleteSamplers_no_error(GLsizei count, const GLuint *samplers);
112
113 void GLAPIENTRY
114 _mesa_DeleteSamplers(GLsizei count, const GLuint *samplers);
115
116 GLboolean GLAPIENTRY
117 _mesa_IsSampler(GLuint sampler);
118
119 void GLAPIENTRY
120 _mesa_BindSampler_no_error(GLuint unit, GLuint sampler);
121
122 void GLAPIENTRY
123 _mesa_BindSampler(GLuint unit, GLuint sampler);
124
125 void GLAPIENTRY
126 _mesa_BindSamplers_no_error(GLuint first, GLsizei count, const GLuint *samplers);
127
128 void GLAPIENTRY
129 _mesa_BindSamplers(GLuint first, GLsizei count, const GLuint *samplers);
130
131 void GLAPIENTRY
132 _mesa_SamplerParameteri(GLuint sampler, GLenum pname, GLint param);
133 void GLAPIENTRY
134 _mesa_SamplerParameterf(GLuint sampler, GLenum pname, GLfloat param);
135 void GLAPIENTRY
136 _mesa_SamplerParameteriv(GLuint sampler, GLenum pname, const GLint *params);
137 void GLAPIENTRY
138 _mesa_SamplerParameterfv(GLuint sampler, GLenum pname, const GLfloat *params);
139 void GLAPIENTRY
140 _mesa_SamplerParameterIiv(GLuint sampler, GLenum pname, const GLint *params);
141 void GLAPIENTRY
142 _mesa_SamplerParameterIuiv(GLuint sampler, GLenum pname, const GLuint *params);
143 void GLAPIENTRY
144 _mesa_GetSamplerParameteriv(GLuint sampler, GLenum pname, GLint *params);
145 void GLAPIENTRY
146 _mesa_GetSamplerParameterfv(GLuint sampler, GLenum pname, GLfloat *params);
147 void GLAPIENTRY
148 _mesa_GetSamplerParameterIiv(GLuint sampler, GLenum pname, GLint *params);
149 void GLAPIENTRY
150 _mesa_GetSamplerParameterIuiv(GLuint sampler, GLenum pname, GLuint *params);
151
152 extern const enum pipe_tex_wrap wrap_to_gallium_table[32];
153
154 /**
155 * Convert GLenum texcoord wrap tokens to pipe tokens.
156 */
157 static inline enum pipe_tex_wrap
wrap_to_gallium(GLenum wrap)158 wrap_to_gallium(GLenum wrap)
159 {
160 return wrap_to_gallium_table[wrap & 0x1f];
161 }
162
163
164 static inline enum pipe_tex_mipfilter
mipfilter_to_gallium(GLenum filter)165 mipfilter_to_gallium(GLenum filter)
166 {
167 /* Take advantage of how the enums are defined. */
168 if (filter <= GL_LINEAR)
169 return PIPE_TEX_MIPFILTER_NONE;
170 if (filter <= GL_LINEAR_MIPMAP_NEAREST)
171 return PIPE_TEX_MIPFILTER_NEAREST;
172
173 return PIPE_TEX_MIPFILTER_LINEAR;
174 }
175
176
177 static inline enum pipe_tex_filter
filter_to_gallium(GLenum filter)178 filter_to_gallium(GLenum filter)
179 {
180 /* Take advantage of how the enums are defined. */
181 if (filter & 1)
182 return PIPE_TEX_FILTER_LINEAR;
183
184 return PIPE_TEX_FILTER_NEAREST;
185 }
186
187 static inline enum pipe_tex_reduction_mode
reduction_to_gallium(GLenum reduction_mode)188 reduction_to_gallium(GLenum reduction_mode)
189 {
190 switch (reduction_mode) {
191 case GL_MIN:
192 return PIPE_TEX_REDUCTION_MIN;
193 case GL_MAX:
194 return PIPE_TEX_REDUCTION_MAX;
195 case GL_WEIGHTED_AVERAGE_EXT:
196 default:
197 return PIPE_TEX_REDUCTION_WEIGHTED_AVERAGE;
198 }
199 }
200
201 /**
202 * Convert an OpenGL compare mode to a pipe tokens.
203 */
204 static inline enum pipe_compare_func
func_to_gallium(GLenum func)205 func_to_gallium(GLenum func)
206 {
207 /* Same values, just biased */
208 STATIC_ASSERT(PIPE_FUNC_NEVER == GL_NEVER - GL_NEVER);
209 STATIC_ASSERT(PIPE_FUNC_LESS == GL_LESS - GL_NEVER);
210 STATIC_ASSERT(PIPE_FUNC_EQUAL == GL_EQUAL - GL_NEVER);
211 STATIC_ASSERT(PIPE_FUNC_LEQUAL == GL_LEQUAL - GL_NEVER);
212 STATIC_ASSERT(PIPE_FUNC_GREATER == GL_GREATER - GL_NEVER);
213 STATIC_ASSERT(PIPE_FUNC_NOTEQUAL == GL_NOTEQUAL - GL_NEVER);
214 STATIC_ASSERT(PIPE_FUNC_GEQUAL == GL_GEQUAL - GL_NEVER);
215 STATIC_ASSERT(PIPE_FUNC_ALWAYS == GL_ALWAYS - GL_NEVER);
216 assert(func >= GL_NEVER);
217 assert(func <= GL_ALWAYS);
218 return (enum pipe_compare_func)(func - GL_NEVER);
219 }
220
221 static inline void
_mesa_update_is_border_color_nonzero(struct gl_sampler_object * samp)222 _mesa_update_is_border_color_nonzero(struct gl_sampler_object *samp)
223 {
224 samp->Attrib.IsBorderColorNonZero = samp->Attrib.state.border_color.ui[0] ||
225 samp->Attrib.state.border_color.ui[1] ||
226 samp->Attrib.state.border_color.ui[2] ||
227 samp->Attrib.state.border_color.ui[3];
228 }
229
230 static inline enum pipe_tex_wrap
lower_gl_clamp(enum pipe_tex_wrap old_wrap,GLenum wrap,bool clamp_to_border)231 lower_gl_clamp(enum pipe_tex_wrap old_wrap, GLenum wrap, bool clamp_to_border)
232 {
233 if (wrap == GL_CLAMP)
234 return clamp_to_border ? PIPE_TEX_WRAP_CLAMP_TO_BORDER :
235 PIPE_TEX_WRAP_CLAMP_TO_EDGE;
236 else if (wrap == GL_MIRROR_CLAMP_EXT)
237 return clamp_to_border ? PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER :
238 PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE;
239 return old_wrap;
240 }
241
242 static inline void
_mesa_lower_gl_clamp(struct gl_context * ctx,struct gl_sampler_object * samp)243 _mesa_lower_gl_clamp(struct gl_context *ctx, struct gl_sampler_object *samp)
244 {
245 if (ctx->DriverFlags.NewSamplersWithClamp) {
246 struct pipe_sampler_state *s = &samp->Attrib.state;
247 bool clamp_to_border = s->min_img_filter != PIPE_TEX_FILTER_NEAREST &&
248 s->mag_img_filter != PIPE_TEX_FILTER_NEAREST;
249
250 s->wrap_s = lower_gl_clamp((enum pipe_tex_wrap)s->wrap_s,
251 samp->Attrib.WrapS, clamp_to_border);
252 s->wrap_t = lower_gl_clamp((enum pipe_tex_wrap)s->wrap_t,
253 samp->Attrib.WrapT, clamp_to_border);
254 s->wrap_r = lower_gl_clamp((enum pipe_tex_wrap)s->wrap_r,
255 samp->Attrib.WrapR, clamp_to_border);
256 }
257 }
258
259 #ifdef __cplusplus
260 }
261 #endif
262
263 #endif /* SAMPLEROBJ_H */
264