opengl
/
glBitmap


			
				
					
						
						
							
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<title>glBitmap: Class TglBitmap2D</title>
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<a name="TglBitmap2D"></a><h1 class="cio">Class TglBitmap2D</h1>
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<td><a class="section" href="#PasDoc-Description">Description</a></td><td><a class="section" href="#PasDoc-Hierarchy">Hierarchy</a></td><td>Fields</td><td><a class="section" href="#PasDoc-Methods">Methods</a></td><td><a class="section" href="#PasDoc-Properties">Properties</a></td></tr></table>
<a name="PasDoc-Description"></a><h2 class="unit">Unit</h2>
<p class="unitlink">
<a  href="glBitmap.html">glBitmap</a></p>
<h2 class="declaration">Declaration</h2>
<p class="declaration">
<code>type TglBitmap2D = class(<a class="normal" href="glBitmap.TglBitmap.html">TglBitmap</a>)</code></p>
<h2 class="description">Description</h2>
<p>
wrapper class for 2-dimensional textures (OpenGL target = GL_TEXTURE_2D) all operations on a bitmap object must be done from the render thread</p>
<a name="PasDoc-Hierarchy"></a><h2 class="hierarchy">Hierarchy</h2>
<ul class="hierarchy"><li class="ancestor">TObject</li>
<li class="ancestor"><a class="normal" href="glBitmap.TglBitmap.html">TglBitmap</a></li>
<li class="thisitem">TglBitmap2D</li></ul><h2 class="overview">Overview</h2>
<a name="PasDoc-Methods"></a><h3 class="summary">Methods</h3>
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<td class="visibility"><a  href="legend.html"><img  src="protected.gif" alt="Protected" title="Protected"></a></td>
<td class="itemcode"><code>procedure <b><a  href="glBitmap.TglBitmap2D.html#UploadDataIntern">UploadDataIntern</a></b>(const aDataObj: <a  href="glBitmap.TglBitmapData.html">TglBitmapData</a>; const aTarget: GLenum );</code></td>
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<td class="itemcode"><code>procedure <b><a  href="glBitmap.TglBitmap2D.html#AfterConstruction">AfterConstruction</a></b>; override;</code></td>
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<td class="itemcode"><code>procedure <b><a  href="glBitmap.TglBitmap2D.html#GrabScreen">GrabScreen</a></b>(const aTop, aLeft, aRight, aBottom: Integer; const aFormat: <a  href="glBitmap.html#TglBitmapFormat">TglBitmapFormat</a>; const aDataObj: <a  href="glBitmap.TglBitmapData.html">TglBitmapData</a>);</code></td>
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<td class="itemcode"><code>procedure <b><a  href="glBitmap.TglBitmap2D.html#UploadData">UploadData</a></b>(const aDataObj: <a  href="glBitmap.TglBitmapData.html">TglBitmapData</a>; const aCheckSize: Boolean = true); override;</code></td>
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<a name="PasDoc-Properties"></a><h3 class="summary">Properties</h3>
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<td class="itemcode"><code>property <b><a  href="glBitmap.TglBitmap2D.html#Width">Width</a></b>;</code></td>
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<td class="itemcode"><code>property <b><a  href="glBitmap.TglBitmap2D.html#Height">Height</a></b>;</code></td>
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<h2 class="description">Description</h2>
<h3 class="detail">Methods</h3>
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<td class="visibility"><a  href="legend.html"><img  src="protected.gif" alt="Protected" title="Protected"></a></td>
<td class="itemcode"><a name="UploadDataIntern"></a><code>procedure <b>UploadDataIntern</b>(const aDataObj: <a  href="glBitmap.TglBitmapData.html">TglBitmapData</a>; const aTarget: GLenum );</code></td>
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<p>
upload the texture data to video card   </p>
<h6 class="description_section">Parameters</h6>
<dl class="parameters">
<dt>aDataObj</dt>
<dd>texture data object that contains the actual data</dd>
<dt>aTarget</dt>
<dd>target o upload data to (e.g. GL_TEXTURE_2D)</dd>
<dt>aBuildWithGlu</dt>
<dd>use glu functions to build mipmaps</dd>
</dl>
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<td class="itemcode"><a name="AfterConstruction"></a><code>procedure <b>AfterConstruction</b>; override;</code></td>
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<p>
this method is called after constructor and initializes the object</p>
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<td class="itemcode"><a name="GrabScreen"></a><code>procedure <b>GrabScreen</b>(const aTop, aLeft, aRight, aBottom: Integer; const aFormat: <a  href="glBitmap.html#TglBitmapFormat">TglBitmapFormat</a>; const aDataObj: <a  href="glBitmap.TglBitmapData.html">TglBitmapData</a>);</code></td>
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<p>
copy a part of the frame buffer to the texture      </p>
<h6 class="description_section">Parameters</h6>
<dl class="parameters">
<dt>aTop</dt>
<dd>topmost pixel to copy</dd>
<dt>aLeft</dt>
<dd>leftmost pixel to copy</dd>
<dt>aRight</dt>
<dd>rightmost pixel to copy</dd>
<dt>aBottom</dt>
<dd>bottommost pixel to copy</dd>
<dt>aFormat</dt>
<dd>format to store data in</dd>
<dt>aDataObj</dt>
<dd>texture data object to store the data in</dd>
</dl>
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<td class="itemcode"><a name="UploadData"></a><code>procedure <b>UploadData</b>(const aDataObj: <a  href="glBitmap.TglBitmapData.html">TglBitmapData</a>; const aCheckSize: Boolean = true); override;</code></td>
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<p>
upload texture data from given data object to video card  </p>
<h6 class="description_section">Parameters</h6>
<dl class="parameters">
<dt>aData</dt>
<dd>texture data object that contains the actual data</dd>
<dt>aCheckSize</dt>
<dd>check size before upload and throw exception if something is wrong</dd>
</dl>
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<h3 class="detail">Properties</h3>
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<td class="itemcode"><a name="Width"></a><code>property <b>Width</b>;</code></td>
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<p>
actual width of the texture</p>
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<td class="itemcode"><a name="Height"></a><code>property <b>Height</b>;</code></td>
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<p>
actual height of the texture</p>
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