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