1991-2006
Silicon Graphics, Inc.
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_ALPHA`, `GL_ALPHA4`, `GL_ALPHA8`, `GL_ALPHA12`, `GL_ALPHA16`, `GL_COMPRESSED_ALPHA`, `GL_COMPRESSED_LUMINANCE`, `GL_COMPRESSED_LUMINANCE_ALPHA`, `GL_COMPRESSED_INTENSITY`, `GL_COMPRESSED_RGB`, `GL_COMPRESSED_RGBA`, `GL_DEPTH_COMPONENT`, `GL_DEPTH_COMPONENT16`, `GL_DEPTH_COMPONENT24`, `GL_DEPTH_COMPONENT32`, `GL_LUMINANCE`, `GL_LUMINANCE4`, `GL_LUMINANCE8`, `GL_LUMINANCE12`, `GL_LUMINANCE16`, `GL_LUMINANCE_ALPHA`, `GL_LUMINANCE4_ALPHA4`, `GL_LUMINANCE6_ALPHA2`, `GL_LUMINANCE8_ALPHA8`, `GL_LUMINANCE12_ALPHA4`, `GL_LUMINANCE12_ALPHA12`, `GL_LUMINANCE16_ALPHA16`, `GL_INTENSITY`, `GL_INTENSITY4`, `GL_INTENSITY8`, `GL_INTENSITY12`, `GL_INTENSITY16`, `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_SLUMINANCE`, `GL_SLUMINANCE8`, `GL_SLUMINANCE_ALPHA`, `GL_SLUMINANCE8_ALPHA8`, `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. Must be 0 or 2 n + 2 &af; border for some integer n. The height of the texture image is 1.

`border`

  Specifies the width of the border. Must be either 0 or 1.

## 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 + 2 &af; border 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 glCopyPixels 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

`glCopyTexImage1D` is available only if the GL version is 1.1 or greater.

Texturing has no effect in color index mode.

1, 2, 3, and 4 are not accepted values for `internalformat`.

An image with 0 width indicates a NULL texture.

When the `ARB_imaging` extension is supported, the RGBA components copied from the framebuffer may be processed by the imaging pipeline. See glTexImage1D for specific details.

`GL_DEPTH_COMPONENT`, `GL_DEPTH_COMPONENT16`, `GL_DEPTH_COMPONENT24`, and `GL_DEPTH_COMPONENT32` are available only if the GL version is 1.4 or greater.

Non-power-of-two textures are supported if the GL version is 2.0 or greater, or if the implementation exports the `GL_ARB_texture_non_power_of_two` extension.

The `GL_SRGB`, `GL_SRGB8`, `GL_SRGB_ALPHA`, `GL_SRGB8_ALPHA8`, `GL_SLUMINANCE`, `GL_SLUMINANCE8`, `GL_SLUMINANCE_ALPHA`, and `GL_SLUMINANCE8_ALPHA8` internal formats are only available if the GL version is 2.1 or greater. See glTexImage1D for specific details about sRGB conversion.

## 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 &it; 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 2 + `GL_MAX_TEXTURE_SIZE`.

`GL_INVALID_VALUE` is generated if non-power-of-two textures are not supported and the `width` cannot be represented as 2 n + 2 &af; border for some integer value of n.

`GL_INVALID_VALUE` is generated if `border` is not 0 or 1.

`GL_INVALID_OPERATION` is generated if `glCopyTexImage1D` is executed between the execution of glBegin and the corresponding execution of glEnd.

`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

glIsEnabled with argument `GL_TEXTURE_1D`

## See Also

glCopyPixels, glCopyTexImage2D, glCopyTexSubImage1D, glCopyTexSubImage2D, glPixelStore, glPixelTransfer, glTexEnv, glTexGen, glTexImage1D, glTexImage2D, glTexSubImage1D, glTexSubImage2D, glTexParameter

## Copyright

Copyright 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.