glCompressedTexSubImage1D, glCompressedTextureSubImage1D — specify a one-dimensional texture subimage in a compressed format
void glCompressedTexSubImage1D(
|
GLenum target, |
| GLint level, | |
| GLint xoffset, | |
| GLsizei width, | |
| GLenum format, | |
| GLsizei imageSize, | |
const GLvoid * data); |
void glCompressedTextureSubImage1D(
|
GLuint texture, |
| GLint level, | |
| GLint xoffset, | |
| GLsizei width, | |
| GLenum format, | |
| GLsizei imageSize, | |
const void *data); |
target
Specifies the target, to which the texture is bound, for
glCompressedTexSubImage1D function. Must be
GL_TEXTURE_1D.
texture
Specifies the texture object name for
glCompressedTextureSubImage1D function.
level
Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
xoffset
Specifies a texel offset in the x direction within the texture array.
width
Specifies the width of the texture subimage.
format
Specifies the format of the compressed image data stored at
address data.
imageSize
Specifies the number of unsigned bytes of image data starting
at the address specified by data.
data
Specifies a pointer to the compressed image data in memory.
Texturing allows elements of an image array to be read by shaders.
glCompressedTexSubImage1D and
glCompressedTextureSubImage1D redefine a contiguous
subregion of an existing one-dimensional texture image. The texels
referenced by data replace the portion of the
existing texture array with x indices xoffset and
internalformat must be a known compressed
image format (such as GL_RGTC) or an
extension-specified compressed-texture format. The
format of the compressed texture image is selected
by the GL implementation that compressed it (see
glTexImage1D),
and should be queried at the time the texture was
compressed with
glGetTexLevelParameter.
If a non-zero named buffer object is bound to the
GL_PIXEL_UNPACK_BUFFER target (see
glBindBuffer)
while a texture image is specified,
data is treated as a byte offset into the buffer
object's data store.
GL_INVALID_ENUM is generated if
internalformat is not one of the generic compressed
internal formats: GL_COMPRESSED_RED,
GL_COMPRESSED_RG,
GL_COMPRESSED_RGB,
GL_COMPRESSED_RGBA.
GL_COMPRESSED_SRGB, or
GL_COMPRESSED_SRGB_ALPHA.
GL_INVALID_VALUE is generated if
imageSize is not consistent with the format,
dimensions, and contents of the specified compressed image data.
GL_INVALID_OPERATION is generated if parameter
combinations are not supported by the specific compressed internal format
as specified in the specific texture compression extension.
GL_INVALID_OPERATION is generated if a non-zero
buffer object name is bound to the
GL_PIXEL_UNPACK_BUFFER target and the buffer object's
data store is currently mapped.
GL_INVALID_OPERATION is generated if a non-zero
buffer object name is bound to the
GL_PIXEL_UNPACK_BUFFER target and the data would be
unpacked from the buffer object such that the memory reads required would
exceed the data store size.
GL_INVALID_OPERATION is generated by
glCompressedTextureSubImage1D function if texture is
not the name of an existing texture object.
Undefined results, including abnormal program termination, are
generated if data is not encoded in a manner
consistent with the extension specification defining the internal
compression format.
glGet
with argument GL_TEXTURE_COMPRESSED
glGet
with argument GL_PIXEL_UNPACK_BUFFER_BINDING
glGetTexLevelParameter
with arguments
GL_TEXTURE_INTERNAL_FORMAT and
GL_TEXTURE_COMPRESSED_IMAGE_SIZE
| 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 |
glCompressedTexSubImage1D
|
✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
glCompressedTextureSubImage1D
|
- | - | - | - | - | - | - | - | - | - | - | ✔ |
glActiveTexture, glCompressedTexImage1D, glCompressedTexImage2D, glCompressedTexImage3D, glCompressedTexSubImage2D, glCompressedTexSubImage3D, glCopyTexImage1D, glCopyTexImage2D, glCopyTexSubImage1D, glCopyTexSubImage2D, glCopyTexSubImage3D, glPixelStore, glTexImage2D, glTexImage3D, glTexSubImage1D, glTexSubImage2D, glTexSubImage3D, glTexParameter
Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2014 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.