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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5564 | serge | 1 | /** |
| 2 | * \file texstate.h |
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| 3 | * Texture state management. |
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| 4 | */ |
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| 5 | |||
| 6 | /* |
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| 7 | * Mesa 3-D graphics library |
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| 8 | * |
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| 9 | * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. |
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| 10 | * |
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| 11 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 12 | * copy of this software and associated documentation files (the "Software"), |
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| 13 | * to deal in the Software without restriction, including without limitation |
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| 14 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 15 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 16 | * Software is furnished to do so, subject to the following conditions: |
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| 17 | * |
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| 18 | * The above copyright notice and this permission notice shall be included |
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| 19 | * in all copies or substantial portions of the Software. |
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| 20 | * |
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| 21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 22 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 24 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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| 25 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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| 26 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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| 27 | * OTHER DEALINGS IN THE SOFTWARE. |
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| 28 | */ |
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| 29 | |||
| 30 | |||
| 31 | #ifndef TEXSTATE_H |
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| 32 | #define TEXSTATE_H |
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| 33 | |||
| 34 | |||
| 35 | #include "compiler.h" |
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| 36 | #include "enums.h" |
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| 37 | #include "macros.h" |
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| 38 | #include "mtypes.h" |
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| 39 | |||
| 40 | |||
| 41 | static inline struct gl_texture_unit * |
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| 42 | _mesa_get_tex_unit(struct gl_context *ctx, GLuint unit) |
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| 43 | { |
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| 44 | assert(unit < ARRAY_SIZE(ctx->Texture.Unit)); |
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| 45 | return &(ctx->Texture.Unit[unit]); |
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| 46 | } |
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| 47 | |||
| 48 | /** |
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| 49 | * Return pointer to current texture unit. |
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| 50 | * This the texture unit set by glActiveTexture(), not glClientActiveTexture(). |
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| 51 | */ |
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| 52 | static inline struct gl_texture_unit * |
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| 53 | _mesa_get_current_tex_unit(struct gl_context *ctx) |
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| 54 | { |
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| 55 | return _mesa_get_tex_unit(ctx, ctx->Texture.CurrentUnit); |
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| 56 | } |
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| 57 | |||
| 58 | static inline GLuint |
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| 59 | _mesa_max_tex_unit(struct gl_context *ctx) |
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| 60 | { |
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| 61 | /* See OpenGL spec for glActiveTexture: */ |
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| 62 | return MAX2(ctx->Const.MaxCombinedTextureImageUnits, |
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| 63 | ctx->Const.MaxTextureCoordUnits); |
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| 64 | } |
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| 65 | |||
| 66 | static inline struct gl_texture_unit * |
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| 67 | _mesa_get_tex_unit_err(struct gl_context *ctx, GLuint unit, const char *func) |
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| 68 | { |
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| 69 | if (unit < _mesa_max_tex_unit(ctx)) |
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| 70 | return _mesa_get_tex_unit(ctx, unit); |
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| 71 | |||
| 72 | /* Note: This error is a precedent set by glBindTextures. From the GL 4.5 |
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| 73 | * specification (30.10.2014) Section 8.1 ("Texture Objects"): |
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| 74 | * |
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| 75 | * "An INVALID_OPERATION error is generated if first + count is greater |
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| 76 | * than the number of texture image units supported by the |
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| 77 | * implementation." |
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| 78 | */ |
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| 79 | _mesa_error(ctx, GL_INVALID_OPERATION, "%s(unit=%s)", func, |
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| 80 | _mesa_lookup_enum_by_nr(GL_TEXTURE0+unit)); |
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| 81 | return NULL; |
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| 82 | } |
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| 83 | |||
| 84 | |||
| 85 | extern void |
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| 86 | _mesa_copy_texture_state( const struct gl_context *src, struct gl_context *dst ); |
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| 87 | |||
| 88 | extern void |
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| 89 | _mesa_print_texunit_state( struct gl_context *ctx, GLuint unit ); |
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| 90 | |||
| 91 | |||
| 92 | |||
| 93 | /** |
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| 94 | * \name Called from API |
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| 95 | */ |
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| 96 | /*@{*/ |
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| 97 | |||
| 98 | extern void GLAPIENTRY |
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| 99 | _mesa_ActiveTexture( GLenum target ); |
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| 100 | |||
| 101 | extern void GLAPIENTRY |
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| 102 | _mesa_ClientActiveTexture( GLenum target ); |
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| 103 | |||
| 104 | /*@}*/ |
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| 105 | |||
| 106 | |||
| 107 | /** |
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| 108 | * \name Initialization, state maintenance |
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| 109 | */ |
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| 110 | /*@{*/ |
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| 111 | |||
| 112 | extern void |
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| 113 | _mesa_update_texture( struct gl_context *ctx, GLuint new_state ); |
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| 114 | |||
| 115 | extern GLboolean |
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| 116 | _mesa_init_texture( struct gl_context *ctx ); |
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| 117 | |||
| 118 | extern void |
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| 119 | _mesa_free_texture_data( struct gl_context *ctx ); |
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| 120 | |||
| 121 | extern void |
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| 122 | _mesa_update_default_objects_texture(struct gl_context *ctx); |
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| 123 | |||
| 124 | /*@}*/ |
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| 125 | |||
| 126 | #endif |