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 "compiler.h"
36#include "enums.h"
37#include "macros.h"
38#include "mtypes.h"
39
40
41static inline struct gl_texture_unit *
42_mesa_get_tex_unit(struct gl_context *ctx, GLuint unit)
43{
44   assert(unit < ARRAY_SIZE(ctx->Texture.Unit));
45   return &(ctx->Texture.Unit[unit]);
46}
47
48/**
49 * Return pointer to current texture unit.
50 * This the texture unit set by glActiveTexture(), not glClientActiveTexture().
51 */
52static inline struct gl_texture_unit *
53_mesa_get_current_tex_unit(struct gl_context *ctx)
54{
55   return _mesa_get_tex_unit(ctx, ctx->Texture.CurrentUnit);
56}
57
58static inline GLuint
59_mesa_max_tex_unit(struct gl_context *ctx)
60{
61   /* See OpenGL spec for glActiveTexture: */
62   return MAX2(ctx->Const.MaxCombinedTextureImageUnits,
63               ctx->Const.MaxTextureCoordUnits);
64}
65
66
67extern void
68_mesa_copy_texture_state( const struct gl_context *src, struct gl_context *dst );
69
70extern void
71_mesa_print_texunit_state( struct gl_context *ctx, GLuint unit );
72
73
74
75/**
76 * \name Called from API
77 */
78/*@{*/
79
80extern void GLAPIENTRY
81_mesa_ActiveTexture( GLenum target );
82
83extern void GLAPIENTRY
84_mesa_ClientActiveTexture( GLenum target );
85
86/*@}*/
87
88
89/**
90 * \name Initialization, state maintenance
91 */
92/*@{*/
93
94extern void
95_mesa_update_texture( struct gl_context *ctx, GLuint new_state );
96
97extern GLboolean
98_mesa_init_texture( struct gl_context *ctx );
99
100extern void
101_mesa_free_texture_data( struct gl_context *ctx );
102
103extern void
104_mesa_update_default_objects_texture(struct gl_context *ctx);
105
106/*@}*/
107
108#endif
109