2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (C) 1999-2013 VMware, Inc. All Rights Reserved.
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8 * copy of this software and associated documentation files (the "Software"),
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12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
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18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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28 * glGenerateMipmap function
33 #include "genmipmap.h"
34 #include "glformats.h"
42 * Implements glGenerateMipmap and glGenerateTextureMipmap.
43 * Generates all the mipmap levels below the base level.
46 _mesa_generate_texture_mipmap(struct gl_context
*ctx
,
47 struct gl_texture_object
*texObj
, GLenum target
,
50 struct gl_texture_image
*srcImage
;
52 const char *suffix
= dsa
? "Texture" : "";
54 FLUSH_VERTICES(ctx
, 0);
58 error
= _mesa_is_gles(ctx
);
64 error
= ctx
->API
== API_OPENGLES
;
66 case GL_TEXTURE_CUBE_MAP
:
67 error
= !ctx
->Extensions
.ARB_texture_cube_map
;
69 case GL_TEXTURE_1D_ARRAY
:
70 error
= _mesa_is_gles(ctx
) || !ctx
->Extensions
.EXT_texture_array
;
72 case GL_TEXTURE_2D_ARRAY
:
73 error
= (_mesa_is_gles(ctx
) && ctx
->Version
< 30)
74 || !ctx
->Extensions
.EXT_texture_array
;
76 case GL_TEXTURE_CUBE_MAP_ARRAY
:
77 error
= _mesa_is_gles(ctx
) ||
78 !ctx
->Extensions
.ARB_texture_cube_map_array
;
85 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGenerate%sMipmap(target=%s)",
86 suffix
, _mesa_lookup_enum_by_nr(target
));
90 if (texObj
->BaseLevel
>= texObj
->MaxLevel
) {
95 if (texObj
->Target
== GL_TEXTURE_CUBE_MAP
&&
96 !_mesa_cube_complete(texObj
)) {
97 _mesa_error(ctx
, GL_INVALID_OPERATION
,
98 "glGenerate%sMipmap(incomplete cube map)", suffix
);
102 _mesa_lock_texture(ctx
, texObj
);
104 srcImage
= _mesa_select_tex_image(texObj
, target
, texObj
->BaseLevel
);
106 _mesa_unlock_texture(ctx
, texObj
);
107 _mesa_error(ctx
, GL_INVALID_OPERATION
,
108 "glGenerate%sMipmap(zero size base image)", suffix
);
112 if (_mesa_is_enum_format_integer(srcImage
->InternalFormat
) ||
113 _mesa_is_depthstencil_format(srcImage
->InternalFormat
) ||
114 _mesa_is_stencil_format(srcImage
->InternalFormat
)) {
115 _mesa_unlock_texture(ctx
, texObj
);
116 _mesa_error(ctx
, GL_INVALID_OPERATION
,
117 "glGenerate%sMipmap(invalid internal format)", suffix
);
121 if (target
== GL_TEXTURE_CUBE_MAP
) {
123 for (face
= 0; face
< 6; face
++) {
124 ctx
->Driver
.GenerateMipmap(ctx
,
125 GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB
+ face
, texObj
);
129 ctx
->Driver
.GenerateMipmap(ctx
, target
, texObj
);
131 _mesa_unlock_texture(ctx
, texObj
);
135 * Generate all the mipmap levels below the base level.
136 * Note: this GL function would be more useful if one could specify a
137 * cube face, a set of array slices, etc.
140 _mesa_GenerateMipmap(GLenum target
)
142 struct gl_texture_object
*texObj
;
143 GET_CURRENT_CONTEXT(ctx
);
145 texObj
= _mesa_get_current_tex_object(ctx
, target
);
149 _mesa_generate_texture_mipmap(ctx
, texObj
, target
, false);
153 * Generate all the mipmap levels below the base level.
156 _mesa_GenerateTextureMipmap(GLuint texture
)
158 struct gl_texture_object
*texObj
;
159 GET_CURRENT_CONTEXT(ctx
);
161 texObj
= _mesa_lookup_texture_err(ctx
, texture
, "glGenerateTextureMipmap");
165 _mesa_generate_texture_mipmap(ctx
, texObj
, texObj
->Target
, true);