Glcopytexsubimage3Dext - HP b2600 Reference Manual

glCopyTexSubImage3DEXT

glCopyTexSubImage3DEXT: copy pixels into a 3D texture sub image.
C Specification
void glCopyTexSubImage3DEXT(
Parameters
target
level
xoffset
yoffset
zoffset
x
y
width
height
Description
glCopyTexSubImage3DEXT replaces a rectangular portion of a three-dimensional
texture image with pixels from the current GL_READ_BUFFER (rather than from main
memory, as is the case for glTexSubImage3DEXT).
The screen-aligned pixel rectangle with lower-left corner at (x, y) having width width
and height height replaces the rectangular area of the S-T slice located at zoffset with X
indices xoffset through xoffset + width - 1, inclusive, and Y indices yoffset through yoffset
+ height - 1, inclusive.
The destination rectangle in the texture array may not include any texels outside the
texture array as it was originally specified. It is not an error to specify a subtexture with
zero width or height, but such a specification has no effect.
Chapter 3
GLenum target,
GLint level,
GLint xoffset,
GLint yoffset,
GLint zoffset,
GLint x,
GLint y,
GLsizei width,
GLsizei height)
The target texture. Must be GL_TEXTURE_3D_EXT.
The level-of-detail number. Level 0 is the base image level, and level n
is the nth mipmap reduction image.
Texel offset in the X direction within the texture array.
Texel offset in the Y direction within the texture array.
Texel offset in the Z direction within the texture array.
The X coordinate of the lower-left corner of the pixel rectangle to be
transferred to the texture array.
The Y coordinate of the lower-left corner of the pixel rectangle to be
transferred to the texture array.
The width of the texture sub image.
The height of the texture sub image.
C
glCopyTexSubImage3DEXT
85