1 /**
2 * \file texstate.h
3 * Texture state management.
4 */
5
6 /*
7 * Mesa 3-D graphics library
8 *
9 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
10 *
11 * Permission is hereby granted, free of charge, to any person obtaining a
12 * copy of this software and associated documentation files (the "Software"),
13 * to deal in the Software without restriction, including without limitation
14 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
15 * and/or sell copies of the Software, and to permit persons to whom the
16 * Software is furnished to do so, subject to the following conditions:
17 *
18 * The above copyright notice and this permission notice shall be included
19 * in all copies or substantial portions of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
22 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
24 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
25 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
26 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
27 * OTHER DEALINGS IN THE SOFTWARE.
28 */
29
30
31 #ifndef TEXSTATE_H
32 #define TEXSTATE_H
33
34
35 #include "enums.h"
36 #include "macros.h"
37 #include "mtypes.h"
38
39
40 static inline struct gl_texture_unit *
_mesa_get_tex_unit(struct gl_context * ctx,GLuint unit)41 _mesa_get_tex_unit(struct gl_context *ctx, GLuint unit)
42 {
43 assert(unit < ARRAY_SIZE(ctx->Texture.Unit));
44 return &(ctx->Texture.Unit[unit]);
45 }
46
47 /**
48 * Return pointer to current texture unit.
49 * This the texture unit set by glActiveTexture(), not glClientActiveTexture().
50 */
51 static inline struct gl_texture_unit *
_mesa_get_current_tex_unit(struct gl_context * ctx)52 _mesa_get_current_tex_unit(struct gl_context *ctx)
53 {
54 return _mesa_get_tex_unit(ctx, ctx->Texture.CurrentUnit);
55 }
56
57
58 /**
59 * Return pointer to current fixed-func texture unit.
60 * This the texture unit set by glActiveTexture(), not glClientActiveTexture().
61 * \return NULL if the current unit is not a fixed-func texture unit
62 */
63 static inline struct gl_fixedfunc_texture_unit *
_mesa_get_fixedfunc_tex_unit(struct gl_context * ctx,GLuint unit)64 _mesa_get_fixedfunc_tex_unit(struct gl_context *ctx, GLuint unit)
65 {
66 if (unit >= ARRAY_SIZE(ctx->Texture.FixedFuncUnit))
67 return NULL;
68
69 return &ctx->Texture.FixedFuncUnit[unit];
70 }
71
72
73 static inline GLuint
_mesa_max_tex_unit(struct gl_context * ctx)74 _mesa_max_tex_unit(struct gl_context *ctx)
75 {
76 /* See OpenGL spec for glActiveTexture: */
77 return MAX2(ctx->Const.MaxCombinedTextureImageUnits,
78 ctx->Const.MaxTextureCoordUnits);
79 }
80
81
82 extern void
83 _mesa_copy_texture_state( const struct gl_context *src, struct gl_context *dst );
84
85 extern void
86 _mesa_print_texunit_state( struct gl_context *ctx, GLuint unit );
87
88
89
90 /**
91 * \name Called from API
92 */
93 /*@{*/
94
95 extern void GLAPIENTRY
96 _mesa_ActiveTexture_no_error( GLenum target );
97
98 extern void GLAPIENTRY
99 _mesa_ActiveTexture( GLenum target );
100
101 extern void GLAPIENTRY
102 _mesa_ClientActiveTexture( GLenum target );
103
104 /*@}*/
105
106
107 /**
108 * \name Initialization, state maintenance
109 */
110 /*@{*/
111
112 extern void
113 _mesa_update_texture_matrices(struct gl_context *ctx);
114
115 extern void
116 _mesa_update_texture_state(struct gl_context *ctx);
117
118 extern GLboolean
119 _mesa_init_texture( struct gl_context *ctx );
120
121 extern void
122 _mesa_free_texture_data( struct gl_context *ctx );
123
124 extern void
125 _mesa_update_default_objects_texture(struct gl_context *ctx);
126
127 /*@}*/
128
129 #endif
130