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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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_has_texture_cube_map_array(ctx
);
78 _mesa_is_valid_generate_texture_mipmap_internalformat(struct gl_context
*ctx
,
79 GLenum internalformat
)
81 if (_mesa_is_gles3(ctx
)) {
82 /* From the ES 3.2 specification's description of GenerateMipmap():
83 * "An INVALID_OPERATION error is generated if the levelbase array was
84 * not specified with an unsized internal format from table 8.3 or a
85 * sized internal format that is both color-renderable and
86 * texture-filterable according to table 8.10."
88 * GL_EXT_texture_format_BGRA8888 adds a GL_BGRA_EXT unsized internal
89 * format, and includes it in a very similar looking table. So we
90 * include it here as well.
92 return internalformat
== GL_RGBA
|| internalformat
== GL_RGB
||
93 internalformat
== GL_LUMINANCE_ALPHA
||
94 internalformat
== GL_LUMINANCE
|| internalformat
== GL_ALPHA
||
95 internalformat
== GL_BGRA_EXT
||
96 (_mesa_is_es3_color_renderable(internalformat
) &&
97 _mesa_is_es3_texture_filterable(ctx
, internalformat
));
100 return (!_mesa_is_enum_format_integer(internalformat
) &&
101 !_mesa_is_depthstencil_format(internalformat
) &&
102 !_mesa_is_astc_format(internalformat
) &&
103 !_mesa_is_stencil_format(internalformat
));
107 * Implements glGenerateMipmap and glGenerateTextureMipmap.
108 * Generates all the mipmap levels below the base level.
111 _mesa_generate_texture_mipmap(struct gl_context
*ctx
,
112 struct gl_texture_object
*texObj
, GLenum target
,
115 struct gl_texture_image
*srcImage
;
116 const char *suffix
= dsa
? "Texture" : "";
118 FLUSH_VERTICES(ctx
, 0);
120 if (texObj
->BaseLevel
>= texObj
->MaxLevel
) {
125 if (texObj
->Target
== GL_TEXTURE_CUBE_MAP
&&
126 !_mesa_cube_complete(texObj
)) {
127 _mesa_error(ctx
, GL_INVALID_OPERATION
,
128 "glGenerate%sMipmap(incomplete cube map)", suffix
);
132 _mesa_lock_texture(ctx
, texObj
);
134 srcImage
= _mesa_select_tex_image(texObj
, target
, texObj
->BaseLevel
);
136 _mesa_unlock_texture(ctx
, texObj
);
137 _mesa_error(ctx
, GL_INVALID_OPERATION
,
138 "glGenerate%sMipmap(zero size base image)", suffix
);
142 if (!_mesa_is_valid_generate_texture_mipmap_internalformat(ctx
,
143 srcImage
->InternalFormat
)) {
144 _mesa_unlock_texture(ctx
, texObj
);
145 _mesa_error(ctx
, GL_INVALID_OPERATION
,
146 "glGenerate%sMipmap(invalid internal format %s)", suffix
,
147 _mesa_enum_to_string(srcImage
->InternalFormat
));
151 if (srcImage
->Width
== 0 || srcImage
->Height
== 0) {
152 _mesa_unlock_texture(ctx
, texObj
);
156 if (target
== GL_TEXTURE_CUBE_MAP
) {
158 for (face
= 0; face
< 6; face
++) {
159 ctx
->Driver
.GenerateMipmap(ctx
,
160 GL_TEXTURE_CUBE_MAP_POSITIVE_X
+ face
, texObj
);
164 ctx
->Driver
.GenerateMipmap(ctx
, target
, texObj
);
166 _mesa_unlock_texture(ctx
, texObj
);
170 * Generate all the mipmap levels below the base level.
171 * Note: this GL function would be more useful if one could specify a
172 * cube face, a set of array slices, etc.
175 _mesa_GenerateMipmap(GLenum target
)
177 struct gl_texture_object
*texObj
;
178 GET_CURRENT_CONTEXT(ctx
);
180 if (!_mesa_is_valid_generate_texture_mipmap_target(ctx
, target
)) {
181 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGenerateMipmap(target=%s)",
182 _mesa_enum_to_string(target
));
186 texObj
= _mesa_get_current_tex_object(ctx
, target
);
190 _mesa_generate_texture_mipmap(ctx
, texObj
, target
, false);
194 * Generate all the mipmap levels below the base level.
197 _mesa_GenerateTextureMipmap(GLuint texture
)
199 struct gl_texture_object
*texObj
;
200 GET_CURRENT_CONTEXT(ctx
);
202 texObj
= _mesa_lookup_texture_err(ctx
, texture
, "glGenerateTextureMipmap");
206 if (!_mesa_is_valid_generate_texture_mipmap_target(ctx
, texObj
->Target
)) {
207 _mesa_error(ctx
, GL_INVALID_ENUM
, "glGenerateTextureMipmap(target=%s)",
208 _mesa_enum_to_string(texObj
->Target
));
212 _mesa_generate_texture_mipmap(ctx
, texObj
, texObj
->Target
, true);