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lazarus-ccr/components/nvidia-widgets/docs/nvcontext/uicontext.dotextureview.html
blaszijk d0340d13eb fixed images in documentation 
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git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@2254 8e941d3f-bd1b-0410-a28a-d453659cc2b4
2012-01-12 15:15:59 +00:00

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<title>UIContext.doTextureView</title>
<link rel="stylesheet" href="../fpdoc.css" type="text/css">
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<table class="bar" width="100%" border="0" cellpadding="4" cellspacing="0">
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<td><b>[<a href="../nvcontext/index.html">Overview</a>][<a href="../nvcontext/index-4.html">Classes</a>][<a href="../nvcontext/index-8.html">Index</a>]</b></td>
<td align="right"><span class="bartitle">Reference for unit 'nvContext' (<a href="../index.html">#nvidia-widgets</a>)</span></td>
</tr>
</table>
<h1>UIContext.doTextureView</h1>
<p>UI method for drawing a texture view</p>
<h2>Declaration</h2>
<p>Source position: nvcontext.pas line 186</p>
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<td><p><tt><span class="code"> <span class="kw">public</span> <span class="kw">procedure</span> <a href="../nvcontext/uicontext.html">UIContext</a><span class="sym">.</span>doTextureView<span class="sym">(</span></span></tt></p></td>
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<td><p><tt><span class="code">&nbsp;&nbsp;<span class="kw">const </span>aRect<span class="sym">: </span><a href="../nvtypes/rect.html">Rect</a><span class="sym">;</span></span></tt></p></td>
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<td><p><tt><span class="code">&nbsp;&nbsp;<span class="kw">const </span>texID<span class="sym">: </span>Integer<span class="sym">;</span></span></tt></p></td>
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<td><p><tt><span class="code">&nbsp;&nbsp;zoomRect<span class="sym">: </span><a href="../nvtypes/rect.html">Rect</a><span class="sym">;</span></span></tt></p></td>
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<td><p><tt><span class="code">&nbsp;&nbsp;mipLevel<span class="sym">: </span>Integer <span class="sym">=</span> <span class="sym">-</span><span class="num">1</span><span class="sym">;</span></span></tt></p></td>
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<td><p><tt><span class="code">&nbsp;&nbsp;texelScale<span class="sym">: </span>Double <span class="sym">=</span> <span class="num">1</span><span class="sym">;</span></span></tt></p></td>
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<td><p><tt><span class="code">&nbsp;&nbsp;texelOffset<span class="sym">: </span>Double <span class="sym">=</span> <span class="num">0</span><span class="sym">;</span></span></tt></p></td>
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<td><p><tt><span class="code">&nbsp;&nbsp;red<span class="sym">: </span>Integer <span class="sym">=</span> <span class="num">0</span><span class="sym">;</span></span></tt></p></td>
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<td><p><tt><span class="code">&nbsp;&nbsp;green<span class="sym">: </span>Integer <span class="sym">=</span> <span class="num">1</span><span class="sym">;</span></span></tt></p></td>
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<td><p><tt><span class="code">&nbsp;&nbsp;blue<span class="sym">: </span>Integer <span class="sym">=</span> <span class="num">2</span><span class="sym">;</span></span></tt></p></td>
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<td><p><tt><span class="code">&nbsp;&nbsp;alpha<span class="sym">: </span>Integer <span class="sym">=</span> <span class="num">3</span><span class="sym">;</span></span></tt></p></td>
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<td><p><tt><span class="code">&nbsp;&nbsp;style<span class="sym">: </span>Integer <span class="sym">=</span> <span class="num">0</span></span></tt></p></td>
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<td><p><tt><span class="code"><span class="sym">)</span><span class="sym">;</span></span></tt></p></td>
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<h2>Arguments</h2>
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<td valign="top"><p><tt><span class="code">aRect</span></tt></p></td>
<td><p>&nbsp;&nbsp;</p></td>
<td><p class="cmt">provides a location and size for the texture view</p></td>
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<td valign="top"><p><tt><span class="code">texID</span></tt></p></td>
<td><p>&nbsp;&nbsp;</p></td>
<td><p class="cmt">texture identifier (Graphics API specific)</p></td>
</tr>
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<td valign="top"><p><tt><span class="code">zoomRect</span></tt></p></td>
<td><p>&nbsp;&nbsp;</p></td>
<td><p class="cmt">rectangle area of the texture displayed</p></td>
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<td valign="top"><p><tt><span class="code">mipLevel</span></tt></p></td>
<td><p>&nbsp;&nbsp;</p></td>
<td><p class="cmt">mip Level of the texture displayed</p></td>
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<td valign="top"><p><tt><span class="code">texelScale</span></tt></p></td>
<td><p>&nbsp;&nbsp;</p></td>
<td><p class="cmt">scale applied to the texel fetch</p></td>
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<td valign="top"><p><tt><span class="code">texelOffset</span></tt></p></td>
<td><p>&nbsp;&nbsp;</p></td>
<td><p class="cmt">offset applied to the texel after scale</p></td>
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<td valign="top"><p><tt><span class="code">style</span></tt></p></td>
<td><p>&nbsp;&nbsp;</p></td>
<td><p class="cmt">optional style flag to modify the look</p></td>
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</table>
<h2>Description</h2>
<p>Several parameters control the equation used to display the texel</p>
<pre>texel <span class="sym">=</span> texture2DFetch<span class="sym">(</span><span class="sym">.</span><span class="sym">.</span><span class="sym">.</span><span class="sym">)</span><span class="sym">;</span>
pixel <span class="sym">=</span> texelSwizzling<span class="sym">(</span> texel <span class="sym">*</span> texelScale <span class="sym">+</span> texelOffset <span class="sym">)</span><span class="sym">;</span>
</pre>
<img alt="" src="../fpdoc/images/textureview.png">
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