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.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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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,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 * OTHER DEALINGS IN THE SOFTWARE.
28 * glGenerateMipmap function
33 #include "genmipmap.h"
34 #include "glformats.h"
42 _mesa_is_valid_generate_texture_mipmap_target(struct gl_context
*ctx
,
49 error
= _mesa_is_gles(ctx
);
55 error
= ctx
->API
== API_OPENGLES
;
57 case GL_TEXTURE_CUBE_MAP
:
58 error
= !ctx
->Extensions
.ARB_texture_cube_map
;
60 case GL_TEXTURE_1D_ARRAY
:
61 error
= _mesa_is_gles(ctx
) || !ctx
->Extensions
.EXT_texture_array
;
63 case GL_TEXTURE_2D_ARRAY
:
64 error
= (_mesa_is_gles(ctx
) && ctx
->Version
< 30)
65 || !ctx
->Extensions
.EXT_texture_array
;
67 case GL_TEXTURE_CUBE_MAP_ARRAY
:
68 error
= _mesa_is_gles(ctx
) ||
69 !ctx
->Extensions
.ARB_texture_cube_map_array
;
79 _mesa_is_valid_generate_texture_mipmap_internalformat(struct gl_context
*ctx
,
80 GLenum internalformat
)
82 if (_mesa_is_gles3(ctx
)) {
83 /* From the ES 3.2 specification's description of GenerateMipmap():
84 * "An INVALID_OPERATION error is generated if the levelbase array was
85 * not specified with an unsized internal format from table 8.3 or a
86 * sized internal format that is both color-renderable and
87 * texture-filterable according to table 8.10."
89 return internalformat
== GL_RGBA
|| internalformat
== GL_RGB
||
90 internalformat
== GL_LUMINANCE_ALPHA
||
91 internalformat
== GL_LUMINANCE
|| internalformat
== GL_ALPHA
||
92 (_mesa_is_es3_color_renderable(internalformat
) &&
93 _mesa_is_es3_texture_filterable(internalformat
));
96 return (!_mesa_is_enum_format_integer(internalformat
) &&
97 !_mesa_is_depthstencil_format(internalformat
) &&
98 !_mesa_is_astc_format(internalformat
) &&
99 !_mesa_is_stencil_format(internalformat
));
103 * Implements glGenerateMipmap and glGenerateTextureMipmap.
104 * Generates all the mipmap levels below the base level.
107 _mesa_generate_texture_mipmap(struct gl_context
*ctx
,
108 struct gl_texture_object
*texObj
, GLenum target
,
111 struct gl_texture_image
*srcImage
;
112 const char *suffix
= dsa
? "Texture" : "";
114 FLUSH_VERTICES(ctx
, 0);
116 if (texObj
->BaseLevel
>= texObj
->MaxLevel
) {
121 if (texObj
->Target
== GL_TEXTURE_CUBE_MAP
&&
122 !_mesa_cube_complete(texObj
)) {
123 _mesa_error(ctx
, GL_INVALID_OPERATION
,
124 "glGenerate%sMipmap(incomplete cube map)", suffix
);
128 _mesa_lock_texture(ctx
, texObj
);
130 srcImage
= _mesa_select_tex_image(texObj
, target
, texObj
->BaseLevel
);
132 _mesa_unlock_texture(ctx
, texObj
);
133 _mesa_error(ctx
, GL_INVALID_OPERATION
,
134 "glGenerate%sMipmap(zero size base image)", suffix
);
138 if (!_mesa_is_valid_generate_texture_mipmap_internalformat(ctx
,
139 srcImage
->InternalFormat
)) {
140 _mesa_unlock_texture(ctx
, texObj
);
141 _mesa_error(ctx
, GL_INVALID_OPERATION
,
142 "glGenerate%sMipmap(invalid internal format)", suffix
);
146 if (target
== GL_TEXTURE_CUBE_MAP
) {
148 for (face
= 0; face
< 6; face
++) {
149 ctx
->Driver
.GenerateMipmap(ctx
,
150 GL_TEXTURE_CUBE_MAP_POSITIVE_X
+ face
, texObj
);
154 ctx
->Driver
.GenerateMipmap(ctx
, target
, texObj
);
156 _mesa_unlock_texture(ctx
, texObj
);
160 * Generate all the mipmap levels below the base level.
161 * Note: this GL function would be more useful if one could specify a
162 * cube face, a set of array slices, etc.
165 _mesa_GenerateMipmap(GLenum target
)
167 struct gl_texture_object
*texObj
;
168 GET_CURRENT_CONTEXT(ctx
);
170 if (!_mesa_is_valid_generate_texture_mipmap_target(ctx
, target
)) {
171 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGenerateMipmap(target=%s)",
172 _mesa_enum_to_string(target
));
176 texObj
= _mesa_get_current_tex_object(ctx
, target
);
180 _mesa_generate_texture_mipmap(ctx
, texObj
, target
, false);
184 * Generate all the mipmap levels below the base level.
187 _mesa_GenerateTextureMipmap(GLuint texture
)
189 struct gl_texture_object
*texObj
;
190 GET_CURRENT_CONTEXT(ctx
);
192 texObj
= _mesa_lookup_texture_err(ctx
, texture
, "glGenerateTextureMipmap");
196 if (!_mesa_is_valid_generate_texture_mipmap_target(ctx
, texObj
->Target
)) {
197 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGenerateTextureMipmap(target=%s)",
198 _mesa_enum_to_string(texObj
->Target
));
202 _mesa_generate_texture_mipmap(ctx
, texObj
, texObj
->Target
, true);