3 * Texture state management.
7 * Mesa 3-D graphics library
9 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
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:
18 * The above copyright notice and this permission notice shall be included
19 * in all copies or substantial portions of the Software.
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.
40 static inline struct gl_texture_unit
*
41 _mesa_get_tex_unit(struct gl_context
*ctx
, GLuint unit
)
43 assert(unit
< ARRAY_SIZE(ctx
->Texture
.Unit
));
44 return &(ctx
->Texture
.Unit
[unit
]);
48 * Return pointer to current texture unit.
49 * This the texture unit set by glActiveTexture(), not glClientActiveTexture().
51 static inline struct gl_texture_unit
*
52 _mesa_get_current_tex_unit(struct gl_context
*ctx
)
54 return _mesa_get_tex_unit(ctx
, ctx
->Texture
.CurrentUnit
);
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
63 static inline struct gl_fixedfunc_texture_unit
*
64 _mesa_get_fixedfunc_tex_unit(struct gl_context
*ctx
, GLuint unit
)
66 if (unit
>= ARRAY_SIZE(ctx
->Texture
.FixedFuncUnit
))
69 return &ctx
->Texture
.FixedFuncUnit
[unit
];
74 _mesa_max_tex_unit(struct gl_context
*ctx
)
76 /* See OpenGL spec for glActiveTexture: */
77 return MAX2(ctx
->Const
.MaxCombinedTextureImageUnits
,
78 ctx
->Const
.MaxTextureCoordUnits
);
83 _mesa_copy_texture_state( const struct gl_context
*src
, struct gl_context
*dst
);
86 _mesa_print_texunit_state( struct gl_context
*ctx
, GLuint unit
);
91 * \name Called from API
95 extern void GLAPIENTRY
96 _mesa_ActiveTexture_no_error( GLenum target
);
98 extern void GLAPIENTRY
99 _mesa_ActiveTexture( GLenum target
);
101 extern void GLAPIENTRY
102 _mesa_ClientActiveTexture( GLenum target
);
108 * \name Initialization, state maintenance
113 _mesa_update_texture_matrices(struct gl_context
*ctx
);
116 _mesa_update_texture_state(struct gl_context
*ctx
);
119 _mesa_init_texture( struct gl_context
*ctx
);
122 _mesa_free_texture_data( struct gl_context
*ctx
);
125 _mesa_update_default_objects_texture(struct gl_context
*ctx
);