<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Graphics.Rendering.OpenGL.GL.ReadCopyPixels</title><link href="ocean.css" rel="stylesheet" type="text/css" title="Ocean" /><script src="haddock-util.js" type="text/javascript"></script><script type="text/javascript">//<![CDATA[
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</script></head><body><div id="package-header"><ul class="links" id="page-menu"><li><a href="src/Graphics-Rendering-OpenGL-GL-ReadCopyPixels.html">Source</a></li><li><a href="index.html">Contents</a></li><li><a href="doc-index.html">Index</a></li></ul><p class="caption">OpenGL-2.2.3.0: A binding for the OpenGL graphics system</p></div><div id="content"><div id="module-header"><table class="info"><tr><th>Portability</th><td>portable</td></tr><tr><th>Stability</th><td>stable</td></tr><tr><th>Maintainer</th><td>sven.panne@aedion.de</td></tr></table><p class="caption">Graphics.Rendering.OpenGL.GL.ReadCopyPixels</p></div><div id="table-of-contents"><p class="caption">Contents</p><ul><li><a href="#g:1">Reading Pixels
</a></li><li><a href="#g:2">Copying Pixels
</a></li></ul></div><div id="description"><p class="caption">Description</p><div class="doc"><p>This module corresponds to section 4.3 (Drawing, Reading, and Copying Pixels)
of the OpenGL 2.1 specs.
</p></div></div><div id="synopsis"><p id="control.syn" class="caption expander" onclick="toggleSection('syn')">Synopsis</p><ul id="section.syn" class="hide" onclick="toggleSection('syn')"><li class="src short"><a href="#v:readPixels">readPixels</a> :: <a href="Graphics-Rendering-OpenGL-GL-CoordTrans.html#t:Position">Position</a> -> <a href="Graphics-Rendering-OpenGL-GL-CoordTrans.html#t:Size">Size</a> -> <a href="Graphics-Rendering-OpenGL-GL-PixelRectangles-Rasterization.html#t:PixelData">PixelData</a> a -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li><li class="src short"><a href="#v:readBuffer">readBuffer</a> :: <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a> <a href="Graphics-Rendering-OpenGL-GL-Framebuffer.html#t:BufferMode">BufferMode</a></li><li class="src short"><span class="keyword">data</span> <a href="#t:PixelCopyType">PixelCopyType</a> <ul class="subs"><li>= <a href="#v:CopyColor">CopyColor</a> </li><li>| <a href="#v:CopyDepth">CopyDepth</a> </li><li>| <a href="#v:CopyStencil">CopyStencil</a> </li></ul></li><li class="src short"><a href="#v:copyPixels">copyPixels</a> :: <a href="Graphics-Rendering-OpenGL-GL-CoordTrans.html#t:Position">Position</a> -> <a href="Graphics-Rendering-OpenGL-GL-CoordTrans.html#t:Size">Size</a> -> <a href="Graphics-Rendering-OpenGL-GL-ReadCopyPixels.html#t:PixelCopyType">PixelCopyType</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a></li></ul></div><div id="interface"><h1 id="g:1">Reading Pixels
</h1><div class="top"><p class="src"><a name="v:readPixels" class="def">readPixels</a> :: <a href="Graphics-Rendering-OpenGL-GL-CoordTrans.html#t:Position">Position</a> -> <a href="Graphics-Rendering-OpenGL-GL-CoordTrans.html#t:Size">Size</a> -> <a href="Graphics-Rendering-OpenGL-GL-PixelRectangles-Rasterization.html#t:PixelData">PixelData</a> a -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-ReadCopyPixels.html#readPixels" class="link">Source</a></p></div><div class="top"><p class="src"><a name="v:readBuffer" class="def">readBuffer</a> :: <a href="Graphics-Rendering-OpenGL-GL-StateVar.html#t:StateVar">StateVar</a> <a href="Graphics-Rendering-OpenGL-GL-Framebuffer.html#t:BufferMode">BufferMode</a><a href="src/Graphics-Rendering-OpenGL-GL-ReadCopyPixels.html#readBuffer" class="link">Source</a></p></div><h1 id="g:2">Copying Pixels
</h1><div class="top"><p class="src"><span class="keyword">data</span> <a name="t:PixelCopyType" class="def">PixelCopyType</a> <a href="src/Graphics-Rendering-OpenGL-GL-ReadCopyPixels.html#PixelCopyType" class="link">Source</a></p><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a name="v:CopyColor" class="def">CopyColor</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a name="v:CopyDepth" class="def">CopyDepth</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a name="v:CopyStencil" class="def">CopyStencil</a></td><td class="doc empty"> </td></tr></table></div><div class="subs instances"><p id="control.i:PixelCopyType" class="caption collapser" onclick="toggleSection('i:PixelCopyType')">Instances</p><div id="section.i:PixelCopyType" class="show"><table><tr><td class="src"><a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Eq.html#t:Eq">Eq</a> <a href="Graphics-Rendering-OpenGL-GL-ReadCopyPixels.html#t:PixelCopyType">PixelCopyType</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Data-Ord.html#t:Ord">Ord</a> <a href="Graphics-Rendering-OpenGL-GL-ReadCopyPixels.html#t:PixelCopyType">PixelCopyType</a></td><td class="doc empty"> </td></tr><tr><td class="src"><a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/Text-Show.html#t:Show">Show</a> <a href="Graphics-Rendering-OpenGL-GL-ReadCopyPixels.html#t:PixelCopyType">PixelCopyType</a></td><td class="doc empty"> </td></tr></table></div></div></div><div class="top"><p class="src"><a name="v:copyPixels" class="def">copyPixels</a> :: <a href="Graphics-Rendering-OpenGL-GL-CoordTrans.html#t:Position">Position</a> -> <a href="Graphics-Rendering-OpenGL-GL-CoordTrans.html#t:Size">Size</a> -> <a href="Graphics-Rendering-OpenGL-GL-ReadCopyPixels.html#t:PixelCopyType">PixelCopyType</a> -> <a href="/usr/share/doc/ghc/html/libraries/base-4.3.1.0/System-IO.html#t:IO">IO</a> <a href="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t:-40--41-">()</a><a href="src/Graphics-Rendering-OpenGL-GL-ReadCopyPixels.html#copyPixels" class="link">Source</a></p></div></div></div><div id="footer"><p>Produced by <a href="http://www.haskell.org/haddock/">Haddock</a> version 2.9.2</p></div></body></html>
