Each element is a single red component.
The GL converts it to floating point and assembles it into an RGBA element
by attaching 0 for green and blue, and 1 for alpha.
- Each component is then multiplied by the signed scale factor <code class="constant">GL_c_SCALE</code>,
- added to the signed bias <code class="constant">GL_c_BIAS</code>,
- and clamped to the range [0,1].
+ Each component is clamped to the range [0,1].
</p></dd><dt><span class="term"><code class="constant">GL_RG</code></span></dt><dd><p>
Each element is a red and green pair.
The GL converts each to floating point and assembles it into an RGBA element
by attaching 0 for blue, and 1 for alpha.
- Each component is then multiplied by the signed scale factor <code class="constant">GL_c_SCALE</code>,
- added to the signed bias <code class="constant">GL_c_BIAS</code>,
- and clamped to the range [0,1].
+ Each component is clamped to the range [0,1].
</p></dd><dt><span class="term"><code class="constant">GL_RGB</code></span></dt><dd></dd><dt><span class="term"><code class="constant">GL_BGR</code></span></dt><dd><p>
Each element is an RGB triple.
The GL converts it to floating point and assembles it into an RGBA element
by attaching 1 for alpha.
- Each component is then multiplied by the signed scale factor <code class="constant">GL_c_SCALE</code>,
- added to the signed bias <code class="constant">GL_c_BIAS</code>,
- and clamped to the range [0,1].
+ Each component is clamped to the range [0,1].
</p></dd><dt><span class="term"><code class="constant">GL_RGBA</code></span></dt><dd></dd><dt><span class="term"><code class="constant">GL_BGRA</code></span></dt><dd><p>
Each element contains all four components.
- Each component is multiplied by the signed scale factor <code class="constant">GL_c_SCALE</code>,
- added to the signed bias <code class="constant">GL_c_BIAS</code>,
- and clamped to the range [0,1].
+ Each component is clamped to the range [0,1].
</p></dd></dl></div><p>
If an application wants to store the texture at a certain
resolution or in a certain format, it can request the resolution
<em class="parameter"><code>internalFormat</code></em> may be one of the base internal formats shown in
Table 1, below
</p><p>
- </p><div class="table"><a id="id4885343"></a><p class="title"><b>Table 1. Base Internal Formats</b></p><table summary="Base Internal Formats" border="1"><colgroup><col align="left" /><col align="left" /><col align="left" /></colgroup><thead><tr><th align="left"><span class="bold"><strong>
+ </p><div class="table"><a id="id4876051"></a><p class="title"><b>Table 1. Base Internal Formats</b></p><table summary="Base Internal Formats" border="1"><colgroup><col align="left" /><col align="left" /><col align="left" /></colgroup><thead><tr><th align="left"><span class="bold"><strong>
Base Internal Format
</strong></span></th><th align="left"><span class="bold"><strong>
RGBA, Depth and Stencil Values
<em class="parameter"><code>internalFormat</code></em> may also be one of the sized internal formats
shown in Table 2, below
</p><p>
- </p><div class="table"><a id="id4853651"></a><p class="title"><b>Table 2. Sized Internal Formats</b></p><table summary="Sized Internal Formats" border="1"><colgroup><col align="left" /><col align="left" /><col align="center" /><col align="center" /><col align="center" /><col align="center" /><col align="center" /></colgroup><thead><tr><th align="left"><span class="bold"><strong>
+ </p><div class="table"><a id="id4758319"></a><p class="title"><b>Table 2. Sized Internal Formats</b></p><table summary="Sized Internal Formats" border="1"><colgroup><col align="left" /><col align="left" /><col align="center" /><col align="center" /><col align="center" /><col align="center" /><col align="center" /></colgroup><thead><tr><th align="left"><span class="bold"><strong>
Sized Internal Format
</strong></span></th><th align="left"><span class="bold"><strong>
Base Internal Format
Finally, <em class="parameter"><code>internalFormat</code></em> may also be one of the generic or compressed
compressed texture formats shown in Table 3 below
</p><p>
- </p><div class="table"><a id="id4840264"></a><p class="title"><b>Table 3. Compressed Internal Formats</b></p><table summary="Compressed Internal Formats" border="1"><colgroup><col align="left" /><col align="left" /><col align="left" /></colgroup><thead><tr><th align="left"><span class="bold"><strong>
+ </p><div class="table"><a id="id4873158"></a><p class="title"><b>Table 3. Compressed Internal Formats</b></p><table summary="Compressed Internal Formats" border="1"><colgroup><col align="left" /><col align="left" /><col align="left" /></colgroup><thead><tr><th align="left"><span class="bold"><strong>
Compressed Internal Format
</strong></span></th><th align="left"><span class="bold"><strong>
Base Internal Format
</p><p>
<code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>width</code></em>, <em class="parameter"><code>height</code></em>, or <em class="parameter"><code>depth</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 non-power-of-two textures are not supported and the <em class="parameter"><code>width</code></em>, <em class="parameter"><code>height</code></em>, or <em class="parameter"><code>depth</code></em> cannot be represented as
- <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
-
- <mml:mrow>
- <mml:msup><mml:mn>2</mml:mn>
- <mml:mi mathvariant="italic">k</mml:mi>
- </mml:msup>
- <mml:mo>+</mml:mo>
- <mml:mrow>
- <mml:mn>2</mml:mn>
- <mml:mo></mml:mo>
- <mml:mfenced open="(" close=")">
- <mml:mi mathvariant="italic">border</mml:mi>
- </mml:mfenced>
- </mml:mrow>
- </mml:mrow>
- </mml:math>
- for some
- integer value of <span class="emphasis"><em>k</em></span>.
- </p><p>
- <code class="constant">GL_INVALID_VALUE</code> is generated if <em class="parameter"><code>border</code></em> is not 0 or 1.
+ <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>type</code></em> is one of
<code class="constant">GL_UNSIGNED_BYTE_3_3_2</code>,
<a href="glTexParameter.xml"><span class="citerefentry"><span class="refentrytitle">glTexParameter</span></span></a>
</p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p>
Copyright <span class="trademark"></span>© 1991-2006 Silicon Graphics, Inc.
- Copyright <span class="trademark"></span>© 2011 Khronos Group.
+ Copyright <span class="trademark"></span>© 2011-2013 Khronos Group.
This document is licensed under the SGI
Free Software B License. For details, see
<a href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.