2013
Khronos Group
glCopyTexImage1D
3G
glCopyTexImage1D
copy pixels into a 1D texture image
C Specification
void glCopyTexImage1D
GLenum target
GLint level
GLenum internalformat
GLint x
GLint y
GLsizei width
GLint border
Parameters
target
Specifies the target texture.
Must be GL_TEXTURE_1D.
level
Specifies the level-of-detail number.
Level 0 is the base image level.
Level n is the nth mipmap reduction image.
internalformat
Specifies the internal format of the texture.
Must be one of the following symbolic constants:
GL_COMPRESSED_RED,
GL_COMPRESSED_RG,
GL_COMPRESSED_RGB,
GL_COMPRESSED_RGBA.
GL_COMPRESSED_SRGB,
GL_COMPRESSED_SRGB_ALPHA.
GL_DEPTH_COMPONENT,
GL_DEPTH_COMPONENT16,
GL_DEPTH_COMPONENT24,
GL_DEPTH_COMPONENT32,
GL_STENCIL_INDEX8,
GL_RED,
GL_RG,
GL_RGB,
GL_R3_G3_B2,
GL_RGB4,
GL_RGB5,
GL_RGB8,
GL_RGB10,
GL_RGB12,
GL_RGB16,
GL_RGBA,
GL_RGBA2,
GL_RGBA4,
GL_RGB5_A1,
GL_RGBA8,
GL_RGB10_A2,
GL_RGBA12,
GL_RGBA16,
GL_SRGB,
GL_SRGB8,
GL_SRGB_ALPHA, or
GL_SRGB8_ALPHA8.
x
y
Specify the window coordinates of the left corner
of the row of pixels to be copied.
width
Specifies the width of the texture image.
The height of the texture image is 1.
border
Must be 0.
Description
glCopyTexImage1D defines a one-dimensional texture image with pixels from the current
GL_READ_BUFFER.
The screen-aligned pixel row with left corner at
x
y
and with a length of
width
defines the texture array
at the mipmap level specified by level.
internalformat specifies the internal format of the texture array.
The pixels in the row 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
0
1
and then converted to the texture's internal format for storage in the texel
array.
Pixel ordering is such that lower
x
screen coordinates correspond to
lower texture coordinates.
If any of the pixels within the specified row of the current
GL_READ_BUFFER are outside the window associated with the current
rendering context, then the values obtained for those pixels are undefined.
glCopyTexImage1D defines a one-dimensional texture image with pixels from the current
GL_READ_BUFFER.
When internalformat is one of the sRGB types, the GL does not automatically convert the source pixels to the sRGB color space. In this case, the glPixelMap function can be used to accomplish the conversion.
Notes
1, 2, 3, and 4 are not accepted values for internalformat.
An image with 0 width indicates a NULL texture.
GL_STENCIL_INDEX8 is accepted for internalformat only
if the GL version is 4.4 or higher.
Errors
GL_INVALID_ENUM is generated if target is not one of the allowable values.
GL_INVALID_VALUE is generated if level is less than 0.
GL_INVALID_VALUE may be generated if level is greater
than
log
2
⁢
max
,
where
max
is the returned value of GL_MAX_TEXTURE_SIZE.
GL_INVALID_VALUE is generated if internalformat is not an allowable value.
GL_INVALID_VALUE is generated if width is less than 0 or greater than
GL_MAX_TEXTURE_SIZE.
GL_INVALID_VALUE is generated if border is not 0.
GL_INVALID_OPERATION is generated if internalformat is
GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT16,
GL_DEPTH_COMPONENT24, or GL_DEPTH_COMPONENT32 and there is no depth
buffer.
Associated Gets
glGetTexImage
See Also
glCopyTexImage2D,
glCopyTexSubImage1D,
glCopyTexSubImage2D,
glPixelStore,
glTexImage1D,
glTexImage2D,
glTexSubImage1D,
glTexSubImage2D,
glTexParameter
Copyright
Copyright 1991-2006
Silicon Graphics, Inc.
Copyright 2012-2013 Khronos Group.
This document is licensed under the SGI
Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/.