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.
41 static inline struct gl_texture_unit
*
42 _mesa_get_tex_unit(struct gl_context
*ctx
, GLuint unit
)
44 assert(unit
< ARRAY_SIZE(ctx
->Texture
.Unit
));
45 return &(ctx
->Texture
.Unit
[unit
]);
49 * Return pointer to current texture unit.
50 * This the texture unit set by glActiveTexture(), not glClientActiveTexture().
52 static inline struct gl_texture_unit
*
53 _mesa_get_current_tex_unit(struct gl_context
*ctx
)
55 return _mesa_get_tex_unit(ctx
, ctx
->Texture
.CurrentUnit
);
59 _mesa_max_tex_unit(struct gl_context
*ctx
)
61 /* See OpenGL spec for glActiveTexture: */
62 return MAX2(ctx
->Const
.MaxCombinedTextureImageUnits
,
63 ctx
->Const
.MaxTextureCoordUnits
);
66 static inline struct gl_texture_unit
*
67 _mesa_get_tex_unit_err(struct gl_context
*ctx
, GLuint unit
, const char *func
)
69 if (unit
< _mesa_max_tex_unit(ctx
))
70 return _mesa_get_tex_unit(ctx
, unit
);
72 /* Note: This error is a precedent set by glBindTextures. From the GL 4.5
73 * specification (30.10.2014) Section 8.1 ("Texture Objects"):
75 * "An INVALID_OPERATION error is generated if first + count is greater
76 * than the number of texture image units supported by the
79 _mesa_error(ctx
, GL_INVALID_OPERATION
, "%s(unit=%s)", func
,
80 _mesa_enum_to_string(GL_TEXTURE0
+unit
));
86 _mesa_copy_texture_state( const struct gl_context
*src
, struct gl_context
*dst
);
89 _mesa_print_texunit_state( struct gl_context
*ctx
, GLuint unit
);
94 * \name Called from API
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( struct gl_context
*ctx
, GLuint new_state
);
116 _mesa_init_texture( struct gl_context
*ctx
);
119 _mesa_free_texture_data( struct gl_context
*ctx
);
122 _mesa_update_default_objects_texture(struct gl_context
*ctx
);