'\" te  
'\"macro stdmacro
.ds Vn Version 1.2
.ds Dt 24 September 1999
.ds Re Release 1.2.1
.ds Dp May 22 14:45
.ds Dm 9 May 22 14:
.ds Xs 48778     7
.TH GLCOPYTEXIMAGE1D 3G
.SH NAME
.B "glCopyTexImage1D
\- copy pixels into a 1D texture image

.SH C SPECIFICATION
void \f3glCopyTexImage1D\fP(
GLenum \fItarget\fP,
.nf
.ta \w'\f3void \fPglCopyTexImage1D( 'u
	GLint \fIlevel\fP,
	GLenum \fIinternalformat\fP,
	GLint \fIx\fP,
	GLint \fIy\fP,
	GLsizei \fIwidth\fP,
	GLint \fIborder\fP )
.fi

.SH PARAMETERS
.TP \w'\fIinternalformat\fP\ \ 'u 
\f2target\fP
Specifies the target texture.
Must be \%\f3GL_TEXTURE_1D\fP.
.TP
\f2level\fP
Specifies the level-of-detail number.
Level 0 is the base image level.
Level \f2n\fP is the \f2n\fPth mipmap reduction image.
.TP
\f2internalformat\fP
Specifies the internal  of the texture.
Must be one of the following symbolic constants:
\%\f3GL_ALPHA\fP,
\%\f3GL_ALPHA4\fP,
\%\f3GL_ALPHA8\fP,
\%\f3GL_ALPHA12\fP,
\%\f3GL_ALPHA16\fP,
\%\f3GL_LUMINANCE\fP,
\%\f3GL_LUMINANCE4\fP,
\%\f3GL_LUMINANCE8\fP,
\%\f3GL_LUMINANCE12\fP,
\%\f3GL_LUMINANCE16\fP,
\%\f3GL_LUMINANCE_ALPHA\fP,
\%\f3GL_LUMINANCE4_ALPHA4\fP,
\%\f3GL_LUMINANCE6_ALPHA2\fP,
\%\f3GL_LUMINANCE8_ALPHA8\fP,
\%\f3GL_LUMINANCE12_ALPHA4\fP,
\%\f3GL_LUMINANCE12_ALPHA12\fP,
\%\f3GL_LUMINANCE16_ALPHA16\fP,
\%\f3GL_INTENSITY\fP,
\%\f3GL_INTENSITY4\fP,
\%\f3GL_INTENSITY8\fP,
\%\f3GL_INTENSITY12\fP,
\%\f3GL_INTENSITY16\fP,
\%\f3GL_RGB\fP,
\%\f3GL_R3_G3_B2\fP,
\%\f3GL_RGB4\fP, 
\%\f3GL_RGB5\fP,
\%\f3GL_RGB8\fP,
\%\f3GL_RGB10\fP,
\%\f3GL_RGB12\fP,
\%\f3GL_RGB16\fP,
\%\f3GL_RGBA\fP,
\%\f3GL_RGBA2\fP,
\%\f3GL_RGBA4\fP,
\%\f3GL_RGB5_A1\fP,
\%\f3GL_RGBA8\fP,
\%\f3GL_RGB10_A2\fP,
\%\f3GL_RGBA12\fP, or
\%\f3GL_RGBA16\fP.
.TP
\f2x\fP, \f2y\fP
Specify the window coordinates of the left corner
of the row of pixels to be copied.
.TP
\f2width\fP
Specifies the width of the texture image.
Must be 0 or (2^n) + 2*\f2border\fP for some integer n.
The height of the texture image is 1.
.TP
\f2border\fP
Specifies the width of the border.
Must be either 0 or 1.
.SH DESCRIPTION
\%\f3glCopyTexImage1D\fP defines a one-dimensional texture image with pixels from the current
\%\f3GL_READ_BUFFER\fP.
.P
The screen-aligned pixel row with left corner at (\f2x\fP, \f2y\fP)
and with a length of \f2width\fP+2*\f2border\fP 
defines the texture array
at the mipmap level specified by \f2level\fP.
\f2internalformat\fP specifies the internal  of the texture array.
.P
The pixels in the row are processed exactly as if
\%\f3glCopyPixels\fP 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  for storage in the texel
array.
.P
Pixel ordering is such that lower \f2x\fP screen coordinates correspond to 
lower texture coordinates.
.P
If any of the pixels within the specified row of the current
\%\f3GL_READ_BUFFER\fP are outside the window associated with the current
rendering context, then the values obtained for those pixels are undefined.
.SH NOTES
\%\f3glCopyTexImage1D\fP is available only if the GL version is 1.1 or greater.
.P
Texturing has no effect in color index mode.
.P
1, 2, 3, and 4 are not accepted values for \f2internalformat\fP.
.P 
An image with 0 width indicates a NULL texture. 
.P
When the \%\f3GL_ARB_imaging\fP extension is supported, the RGBA components
copied from the framebuffer may be processed by the imaging pipeline.  See
\%\f3glTexImage1D\fP for specific details.
.SH ERRORS
\%\f3GL_INVALID_ENUM\fP is generated if \f2target\fP is not one of the
allowable values.
.P
\%\f3GL_INVALID_VALUE\fP is generated if \f2level\fP is less than 0.
.P 
\%\f3GL_INVALID_VALUE\fP may be generated if \f2level\fP is greater
than log2(max),
where max is the returned value of \%\f3GL_MAX_TEXTURE_SIZE\fP.
.P 
\%\f3GL_INVALID_ENUM\fP is generated if \f2internalformat\fP is not an
allowable value.  
.P
\%\f3GL_INVALID_VALUE\fP is generated if \f2width\fP is less than 0
or greater than 
2 + \%\f3GL_MAX_TEXTURE_SIZE\fP,
or if it cannot be represented as (2^n) + 2*\f2border\fP
for some integer value of \f2n\fP.
.P
\%\f3GL_INVALID_VALUE\fP is generated if \f2border\fP is not 0 or 1.
.P
\%\f3GL_INVALID_OPERATION\fP is generated if \%\f3glCopyTexImage1D\fP
is executed between the execution of \%\f3glBegin\fP
and the corresponding execution of \%\f3glEnd\fP.
.SH ASSOCIATED GETS
\%\f3glGetTexImage\fP
.br
\%\f3glIsEnabled\fP with argument \%\f3GL_TEXTURE_1D\fP
.SH SEE ALSO
\%\f3glCopyPixels\fP,
\%\f3glCopyTexImage2D\fP,
\%\f3glCopyTexSubImage1D\fP,
\%\f3glCopyTexSubImage2D\fP,
\%\f3glPixelStore\fP,
\%\f3glPixelTransfer\fP,
\%\f3glTexEnv\fP,
\%\f3glTexGen\fP,
\%\f3glTexImage1D\fP,
\%\f3glTexImage2D\fP,
\%\f3glTexSubImage1D\fP,
\%\f3glTexSubImage2D\fP,
.br
\%\f3glTexParameter\fP