glGenerateMipmap, glGenerateTextureMipmap — generate mipmaps for a specified texture object
void glGenerateMipmap(
|
GLenum target); |
void glGenerateTextureMipmap(
|
GLuint texture); |
target
Specifies the target to which the texture object is
bound for glGenerateMipmap. Must be
one of GL_TEXTURE_1D,
GL_TEXTURE_2D,
GL_TEXTURE_3D,
GL_TEXTURE_1D_ARRAY,
GL_TEXTURE_2D_ARRAY,
GL_TEXTURE_CUBE_MAP, or
GL_TEXTURE_CUBE_MAP_ARRAY.
texture
Specifies the texture object name for
glGenerateTextureMipmap.
glGenerateMipmap and
glGenerateTextureMipmap generates mipmaps
for the specified texture object. For
glGenerateMipmap, the texture object
that is bound to target. For
glGenerateTextureMipmap,
texture is the name of the texture
object.
For cube map and cube map array textures, the texture object must be cube complete or cube array complete respectively.
Mipmap generation replaces texel image levels $level_{base} + 1$ through $q$ with images derived from the $level_{base}$ image, regardless of their previous contents. All other mimap images, including the $level_{base}+1$ image, are left unchanged by this computation.
The internal formats of the derived mipmap images all match those of the $level_{base}$ image. The contents of the derived images are computed by repeated, filtered reduction of the $level_{base} + 1$ image. For one- and two-dimensional array and cube map array textures, each layer is filtered independently.
Cube map array textures are accepted only if the GL version is 4.0 or higher.
GL_INVALID_ENUM is generated by
glGenerateMipmap if
target is not one of the accepted texture
targets.
GL_INVALID_OPERATION is generated by
glGenerateTextureMipmap if
texture is not the name of an existing
texture object.
GL_INVALID_OPERATION is generated if
target is
GL_TEXTURE_CUBE_MAP or
GL_TEXTURE_CUBE_MAP_ARRAY, and the
specified texture object is not cube complete or cube array
complete, respectively.
| OpenGL Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Function / Feature Name | 2.0 | 2.1 | 3.0 | 3.1 | 3.2 | 3.3 | 4.0 | 4.1 | 4.2 | 4.3 | 4.4 | 4.5 |
glGenerateMipmap
|
- | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
glGenerateTextureMipmap
|
- | - | - | - | - | - | - | - | - | - | - | ✔ |
Copyright © 2010-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.