Name

glCopyTexImage1D - copy pixels into a	1D texture image

Python Specification

glCopyTexImage1D
	glCopyTexImage1D(target, level, internalFormat, x, y, width, border) -> None

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_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, or GL_RGBA16.

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*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 * 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.

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.

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 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,	or if it cannot	be
represented as 2**n +	2 * (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.

Associated Gets

glGetTexImage
glIsEnabled with argument GL_TEXTURE_1D

See Also

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

:: Documentation :: References :: GL ::
:: Index (n/a) ::