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 * Generate all the mipmap levels below the base level.
43 * Note: this GL function would be more useful if one could specify a
44 * cube face, a set of array slices, etc.
47 _mesa_GenerateMipmap(GLenum target
)
49 struct gl_texture_image
*srcImage
;
50 struct gl_texture_object
*texObj
;
53 GET_CURRENT_CONTEXT(ctx
);
55 FLUSH_VERTICES(ctx
, 0);
59 error
= _mesa_is_gles(ctx
);
65 error
= ctx
->API
== API_OPENGLES
;
67 case GL_TEXTURE_CUBE_MAP
:
68 error
= !ctx
->Extensions
.ARB_texture_cube_map
;
70 case GL_TEXTURE_1D_ARRAY
:
71 error
= _mesa_is_gles(ctx
) || !ctx
->Extensions
.EXT_texture_array
;
73 case GL_TEXTURE_2D_ARRAY
:
74 error
= (_mesa_is_gles(ctx
) && ctx
->Version
< 30)
75 || !ctx
->Extensions
.EXT_texture_array
;
77 case GL_TEXTURE_CUBE_MAP_ARRAY
:
78 error
= _mesa_is_gles(ctx
) ||
79 !ctx
->Extensions
.ARB_texture_cube_map_array
;
86 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGenerateMipmapEXT(target=%s)",
87 _mesa_lookup_enum_by_nr(target
));
91 texObj
= _mesa_get_current_tex_object(ctx
, target
);
93 if (texObj
->BaseLevel
>= texObj
->MaxLevel
) {
98 if (texObj
->Target
== GL_TEXTURE_CUBE_MAP
&&
99 !_mesa_cube_complete(texObj
)) {
100 _mesa_error(ctx
, GL_INVALID_OPERATION
,
101 "glGenerateMipmap(incomplete cube map)");
105 _mesa_lock_texture(ctx
, texObj
);
107 srcImage
= _mesa_select_tex_image(ctx
, texObj
, target
, texObj
->BaseLevel
);
109 _mesa_unlock_texture(ctx
, texObj
);
110 _mesa_error(ctx
, GL_INVALID_OPERATION
,
111 "glGenerateMipmap(zero size base image)");
115 if (_mesa_is_enum_format_integer(srcImage
->InternalFormat
) ||
116 _mesa_is_depthstencil_format(srcImage
->InternalFormat
) ||
117 _mesa_is_stencil_format(srcImage
->InternalFormat
)) {
118 _mesa_unlock_texture(ctx
, texObj
);
119 _mesa_error(ctx
, GL_INVALID_OPERATION
,
120 "glGenerateMipmap(invalid internal format)");
124 if (target
== GL_TEXTURE_CUBE_MAP
) {
126 for (face
= 0; face
< 6; face
++)
127 ctx
->Driver
.GenerateMipmap(ctx
,
128 GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB
+ face
,
132 ctx
->Driver
.GenerateMipmap(ctx
, target
, texObj
);
134 _mesa_unlock_texture(ctx
, texObj
);