glCopyTexSubImage3D, glCopyTextureSubImage3D — copy a three-dimensional texture subimage
void glCopyTexSubImage3D(
|
GLenum target, |
| GLint level, | |
| GLint xoffset, | |
| GLint yoffset, | |
| GLint zoffset, | |
| GLint x, | |
| GLint y, | |
| GLsizei width, | |
GLsizei height); |
void glCopyTextureSubImage3D(
|
GLuint texture, |
| GLint level, | |
| GLint xoffset, | |
| GLint yoffset, | |
| GLint zoffset, | |
| GLint x, | |
| GLint y, | |
| GLsizei width, | |
GLsizei height); |
target
Specifies the target to which the texture object is bound for
glCopyTexSubImage3D function. Must be
GL_TEXTURE_3D,
GL_TEXTURE_2D_ARRAY or
GL_TEXTURE_CUBE_MAP_ARRAY.
texture
Specifies the texture object name for
glCopyTextureSubImage3D 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.
yoffset
Specifies a texel offset in the y direction within the texture array.
zoffset
Specifies a texel offset in the z direction within the texture array.
x,
y
Specify the window coordinates of the lower left corner of the rectangular region of pixels to be copied.
width
Specifies the width of the texture subimage.
height
Specifies the height of the texture subimage.
glCopyTexSubImage3D and
glCopyTextureSubImage3D functions replace a rectangular portion of a three-dimensional
or two-dimensional array texture image with pixels from the current GL_READ_BUFFER (rather
than from main memory, as is the case for glTexSubImage3D).
The screen-aligned pixel rectangle with lower left corner at
(x, y) and with
width width and height height replaces the portion of the
texture array with x indices xoffset through
yoffset through
zoffset and at the mipmap level specified by level.
The pixels in the rectangle are processed exactly as if
glReadPixels had been called, but the process stops just before
final conversion.
At this point, all pixel component values are clamped to the range
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.
If any of the pixels within the specified rectangle of the current
GL_READ_BUFFER are outside the read window associated with the current
rendering context, then the values obtained for those pixels are undefined.
No change is made to the internalformat, width, height, depth, or border parameters of the specified texture array or to texel values outside the specified subregion.
glPixelStore modes affect texture images.
GL_INVALID_ENUM is generated by
glCopyTexSubImage3D if target
is not GL_TEXTURE_3D,
GL_TEXTURE_2D_ARRAY or
GL_TEXTURE_CUBE_MAP_ARRAY.
GL_INVALID_OPERATION is generated by
glCopyTextureSubImage3D if the effective target is
not GL_TEXTURE_3D,
GL_TEXTURE_2D_ARRAY,
GL_TEXTURE_CUBE_MAP_ARRAY or
GL_TEXTURE_CUBE_MAP.
GL_INVALID_FRAMEBUFFER_OPERATION is generated
if the object bound to GL_READ_FRAMEBUFFER_BINDING is
not framebuffer complete.
GL_INVALID_OPERATION is generated if the
texture array has not been defined by a previous
glTexImage3D
or
glTexStorage3D
operation.
GL_INVALID_OPERATION is generated by
glCopyTextureSubImage3D if
texture is not the name of an existing texture
object.
GL_INVALID_VALUE is generated if
level is less than 0.
GL_INVALID_VALUE may be generated if
GL_MAX_3D_TEXTURE_SIZE if target
is GL_TEXTURE_3D or the returned value of GL_MAX_ARRAY_TEXTURE_LAYERS
if target is GL_TEXTURE_2D_ARRAY.
GL_INVALID_VALUE is generated if
GL_TEXTURE_WIDTH,
GL_TEXTURE_HEIGHT,
GL_TEXTURE_DEPTH and
of the texture image being modified.
Note that
GL_INVALID_OPERATION is generated
if:
the read buffer is GL_NONE, or
the value of GL_READ_FRAMEBUFFER_BINDING
is non-zero, and:
the read buffer selects an attachment that has no image attached, or
the effective value of
GL_SAMPLE_BUFFERS for the read
framebuffer is one.
| 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 |
glCopyTexSubImage3D
|
✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
glCopyTextureSubImage3D
|
- | - | - | - | - | - | - | - | - | - | - | ✔ |
glCopyTexImage1D, glCopyTexImage2D, glCopyTexSubImage1D, glCopyTexSubImage2D, glPixelStore, glReadBuffer, glTexImage1D, glTexImage2D, glTexImage3D, glTexParameter, glTexSubImage1D, glTexSubImage2D, glTexSubImage3D
Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2012-2014 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.