glInvalidateTexSubImage man page on RedHat
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GLINVALIDATETEXSUBIM(3G) OpenGL Manual GLINVALIDATETEXSUBIM(3G)
NAME
glInvalidateTexSubImage - invalidate a region of a texture image
C SPECIFICATION
void glInvalidateTexSubImage(GLuint texture, GLint level,
GLint xoffset, GLint yoffset,
GLint zoffset, GLsizei width,
GLsizei height, GLsizei depth);
PARAMETERS
texture
The name of a texture object a subregion of which to invalidate.
level
The level of detail of the texture object within which the region
resides.
xoffset
The X offset of the region to be invalidated.
yoffset
The Y offset of the region to be invalidated.
zoffset
The Z offset of the region to be invalidated.
width
The width of the region to be invalidated.
height
The height of the region to be invalidated.
depth
The depth of the region to be invalidated.
DESCRIPTION
glInvalidateTexSubImage invalidates all or part of a texture image.
texture and level indicated which texture image is being invalidated.
After this command, data in that subregion have undefined values.
xoffset, yoffset, zoffset, width, height, and depth are interpreted as
they are in glTexSubImage3D(). For texture targets that don't have
certain dimensions, this command treats those dimensions as having a
size of 1. For example, to invalidate a portion of a two- dimensional
texture, the application would use zoffset equal to zero and depth
equal to one. Cube map textures are treated as an array of six slices
in the z-dimension, where a value of zoffset is interpreted as
specifying face TEXTURE_CUBE_MAP_POSITIVE_X + zoffset.
level must be greater than or equal to zero and be less than the base 2
logarithm of the maximum texture width, height, or depth. xoffset,
yoffset and zoffset must be greater than or equal to zero and be less
than the width, height or depth of the image, respectively.
Furthermore, xoffset + width, yoffset + height, and zoffset + depth
must be less than or equal to the width, height or depth of the image,
respectively.
For textures of targets GL_TEXTURE_RECTANGLE, GL_TEXTURE_BUFFER,
GL_TEXTURE_2D_MULTISAMPLE, or GL_TEXTURE_2D_MULTISAMPLE_ARRAY, level
must be zero.
ERRORS
GL_INVALID_VALUE is generated if xoffset, yoffset or zoffset is less
than zero, or if any of them is greater than the size of the image in
the corresponding dimension.
GL_INVALID_VALUE is generated if level is less than zero or if it is
greater or equal to the base 2 logarithm of the maximum texture width,
height, or depth.
GL_INVALID_VALUE is generated if the target of texture is any of
GL_TEXTURE_RECTANGLE, GL_TEXTURE_BUFFER, GL_TEXTURE_2D_MULTISAMPLE, or
GL_TEXTURE_2D_MULTISAMPLE_ARRAY and level is not zero.
GL_INVALID_VALUE is generated if texture is not the name of an existing
texture object.
ASSOCIATED GETS
glGet() with argument GL_MAX_TEXTURE_SIZE
SEE ALSO
glInvalidateTexImage(),, glInvalidateBufferSubData(),
glInvalidateBufferData(), glInvalidateFramebuffer(),
glInvalidateSubFramebuffer().
COPYRIGHT
Copyright © 2012 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/.
AUTHORS
opengl.org
opengl.org 03/16/2013 GLINVALIDATETEXSUBIM(3G)
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