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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd">
<?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><link rel="stylesheet" type="text/css" href="opengl-man.css" /><title>glCopyTexImage1D - OpenGL 4 Reference Pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /></head><body><div class="refentry"><a id="glCopyTexImage1D"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glCopyTexImage1D — copy pixels into a 1D texture image</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">void <strong class="fsfunc">glCopyTexImage1D</strong>(</code></td><td>GLenum <var class="pdparam">target</var>, </td></tr><tr><td> </td><td>GLint <var class="pdparam">level</var>, </td></tr><tr><td> </td><td>GLenum <var class="pdparam">internalformat</var>, </td></tr><tr><td> </td><td>GLint <var class="pdparam">x</var>, </td></tr><tr><td> </td><td>GLint <var class="pdparam">y</var>, </td></tr><tr><td> </td><td>GLsizei <var class="pdparam">width</var>, </td></tr><tr><td> </td><td>GLint <var class="pdparam">border</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>target</code></em></span></dt><dd><p>
Specifies the target texture.
Must be <code class="constant">GL_TEXTURE_1D</code>.
</p></dd><dt><span class="term"><em class="parameter"><code>level</code></em></span></dt><dd><p>
Specifies the level-of-detail number.
Level 0 is the base image level.
Level <span class="emphasis"><em>n</em></span> is the <span class="emphasis"><em>n</em></span>th mipmap reduction image.
</p></dd><dt><span class="term"><em class="parameter"><code>internalformat</code></em></span></dt><dd><p>
Specifies the internal format of the texture.
Must be one of the following symbolic constants:
<code class="constant">GL_COMPRESSED_RED</code>,
<code class="constant">GL_COMPRESSED_RG</code>,
<code class="constant">GL_COMPRESSED_RGB</code>,
<code class="constant">GL_COMPRESSED_RGBA</code>.
<code class="constant">GL_COMPRESSED_SRGB</code>,
<code class="constant">GL_COMPRESSED_SRGB_ALPHA</code>.
<code class="constant">GL_DEPTH_COMPONENT</code>,
<code class="constant">GL_DEPTH_COMPONENT16</code>,
<code class="constant">GL_DEPTH_COMPONENT24</code>,
<code class="constant">GL_DEPTH_COMPONENT32</code>,
<code class="constant">GL_STENCIL_INDEX8</code>,
<code class="constant">GL_RED</code>,
<code class="constant">GL_RG</code>,
<code class="constant">GL_RGB</code>,
<code class="constant">GL_R3_G3_B2</code>,
<code class="constant">GL_RGB4</code>,
<code class="constant">GL_RGB5</code>,
<code class="constant">GL_RGB8</code>,
<code class="constant">GL_RGB10</code>,
<code class="constant">GL_RGB12</code>,
<code class="constant">GL_RGB16</code>,
<code class="constant">GL_RGBA</code>,
<code class="constant">GL_RGBA2</code>,
<code class="constant">GL_RGBA4</code>,
<code class="constant">GL_RGB5_A1</code>,
<code class="constant">GL_RGBA8</code>,
<code class="constant">GL_RGB10_A2</code>,
<code class="constant">GL_RGBA12</code>,
<code class="constant">GL_RGBA16</code>,
<code class="constant">GL_SRGB</code>,
<code class="constant">GL_SRGB8</code>,
<code class="constant">GL_SRGB_ALPHA</code>, or
<code class="constant">GL_SRGB8_ALPHA8</code>.
</p></dd><dt><span class="term"><em class="parameter"><code>x</code></em>, </span><span class="term"><em class="parameter"><code>y</code></em></span></dt><dd><p>
Specify the window coordinates of the left corner
of the row of pixels to be copied.
</p></dd><dt><span class="term"><em class="parameter"><code>width</code></em></span></dt><dd><p>
Specifies the width of the texture image.
The height of the texture image is 1.
</p></dd><dt><span class="term"><em class="parameter"><code>border</code></em></span></dt><dd><p>
Must be 0.
</p></dd></dl></div></div><div class="refsect1"><a id="description"></a><h2>Description</h2><p>
<code class="function">glCopyTexImage1D</code> defines a one-dimensional texture image with pixels from the current
<code class="constant">GL_READ_BUFFER</code>.
</p><p>
The screen-aligned pixel row with left corner at
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
<mml:mfenced open="(" close=")">
<mml:mi mathvariant="italic">x</mml:mi>
<mml:mi mathvariant="italic">y</mml:mi>
</mml:mfenced>
</mml:math>
and with a length of
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
<mml:mi mathvariant="italic">width</mml:mi>
</mml:math>
defines the texture array
at the mipmap level specified by <em class="parameter"><code>level</code></em>.
<em class="parameter"><code>internalformat</code></em> specifies the internal format of the texture array.
</p><p>
The pixels in the row are processed exactly as if
<a class="citerefentry" href="glReadPixels.xml"><span class="citerefentry"><span class="refentrytitle">glReadPixels</span></span></a> had been called, but the process stops just before
final conversion.
At this point all pixel component values are clamped to the range
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
<mml:mfenced open="[" close="]">
<mml:mn>0</mml:mn>
<mml:mn>1</mml:mn>
</mml:mfenced>
</mml:math>
and then converted to the texture's internal format for storage in the texel
array.
</p><p>
Pixel ordering is such that lower
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">x</mml:mi></mml:math>
screen coordinates correspond to
lower texture coordinates.
</p><p>
If any of the pixels within the specified row of the current
<code class="constant">GL_READ_BUFFER</code> are outside the window associated with the current
rendering context, then the values obtained for those pixels are undefined.
</p><p>
<code class="function">glCopyTexImage1D</code> defines a one-dimensional texture image with pixels from the current
<code class="constant">GL_READ_BUFFER</code>.
</p><p>
When <em class="parameter"><code>internalformat</code></em> is one of the sRGB types, the GL does not automatically convert the source pixels to the sRGB color space. In this case, the <code class="function">glPixelMap</code> function can be used to accomplish the conversion.
</p></div><div class="refsect1"><a id="notes"></a><h2>Notes</h2><p>
1, 2, 3, and 4 are not accepted values for <em class="parameter"><code>internalformat</code></em>.
</p><p>
An image with 0 width indicates a NULL texture.
</p><p>
<code class="constant">GL_STENCIL_INDEX8</code> is accepted for <em class="parameter"><code>internalformat</code></em> only
if the GL version is 4.4 or higher.
</p></div><div class="refsect1"><a id="errors"></a><h2>Errors</h2><p>
<code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>target</code></em> is not one of the allowable values.
</p><p>
<code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>level</code></em> is less than 0.
</p><p>
<code class="constant">GL_INVALID_VALUE</code> may be generated if <em class="parameter"><code>level</code></em> is greater
than
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
<mml:mrow>
<mml:msub><mml:mi mathvariant="italic">log</mml:mi>
<mml:mn>2</mml:mn>
</mml:msub>
<mml:mo></mml:mo>
<mml:mi mathvariant="italic">max</mml:mi>
</mml:mrow>
</mml:math>,
where
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">max</mml:mi></mml:math>
is the returned value of <code class="constant">GL_MAX_TEXTURE_SIZE</code>.
</p><p>
<code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>internalformat</code></em> is not an allowable value.
</p><p>
<code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>width</code></em> is less than 0 or greater than
<code class="constant">GL_MAX_TEXTURE_SIZE</code>.
</p><p>
<code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>border</code></em> is not 0.
</p><p>
<code class="constant">GL_INVALID_OPERATION</code> is generated if <em class="parameter"><code>internalformat</code></em> is
<code class="constant">GL_DEPTH_COMPONENT</code>, <code class="constant">GL_DEPTH_COMPONENT16</code>,
<code class="constant">GL_DEPTH_COMPONENT24</code>, or <code class="constant">GL_DEPTH_COMPONENT32</code> and there is no depth
buffer.
</p></div><div class="refsect1"><a id="associatedgets"></a><h2>Associated Gets</h2><p>
<a class="citerefentry" href="glGetTexImage.xml"><span class="citerefentry"><span class="refentrytitle">glGetTexImage</span></span></a>
</p></div><div class="refsect1"><a id="seealso"></a><h2>See Also</h2><p>
<a class="citerefentry" href="glCopyTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexImage2D</span></span></a>,
<a class="citerefentry" href="glCopyTexSubImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexSubImage1D</span></span></a>,
<a class="citerefentry" href="glCopyTexSubImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glCopyTexSubImage2D</span></span></a>,
<a class="citerefentry" href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>,
<a class="citerefentry" href="glTexImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage1D</span></span></a>,
<a class="citerefentry" href="glTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage2D</span></span></a>,
<a class="citerefentry" href="glTexSubImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glTexSubImage1D</span></span></a>,
<a class="citerefentry" href="glTexSubImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glTexSubImage2D</span></span></a>,
<a class="citerefentry" href="glTexParameter.xml"><span class="citerefentry"><span class="refentrytitle">glTexParameter</span></span></a>
</p></div><div class="refsect1"><a id="Copyright"></a><h2>Copyright</h2><p>
Copyright <span class="trademark"></span>© 1991-2006
Silicon Graphics, Inc.
Copyright <span class="trademark"></span>© 2012-2013 Khronos Group.
This document is licensed under the SGI
Free Software B License. For details, see
<a class="ulink" href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.
</p></div></div></body></html>
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