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<h1>crop.cpp</h1><a href="crop_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">//==============================================</span>
<a name="l00002"></a>00002 <span class="comment">// copyright : (C) 2003-2005 by Will Stokes</span>
<a name="l00003"></a>00003 <span class="comment">//==============================================</span>
<a name="l00004"></a>00004 <span class="comment">// This program is free software; you can redistribute it</span>
<a name="l00005"></a>00005 <span class="comment">// and/or modify it under the terms of the GNU General</span>
<a name="l00006"></a>00006 <span class="comment">// Public License as published by the Free Software</span>
<a name="l00007"></a>00007 <span class="comment">// Foundation; either version 2 of the License, or</span>
<a name="l00008"></a>00008 <span class="comment">// (at your option) any later version.</span>
<a name="l00009"></a>00009 <span class="comment">//==============================================</span>
<a name="l00010"></a>00010
<a name="l00011"></a>00011 <span class="comment">//Systemwide includes</span>
<a name="l00012"></a>00012 <span class="preprocessor">#include <qimage.h></span>
<a name="l00013"></a>00013 <span class="preprocessor">#include <qstring.h></span>
<a name="l00014"></a>00014
<a name="l00015"></a>00015 <span class="comment">//Projectwide includes</span>
<a name="l00016"></a>00016 <span class="preprocessor">#include "<a class="code" href="crop_8h.html">crop.h</a>"</span>
<a name="l00017"></a>00017
<a name="l00018"></a>00018 <span class="comment">//----------------------------------------------</span>
<a name="l00019"></a>00019 <span class="comment">// Inputs:</span>
<a name="l00020"></a>00020 <span class="comment">// -------</span>
<a name="l00021"></a>00021 <span class="comment">// QString filename - location of original image on disk</span>
<a name="l00022"></a>00022 <span class="comment">// QPoint topLeft - top left of selected region</span>
<a name="l00023"></a>00023 <span class="comment">// QPoint bottomRight - bottom right of selected region</span>
<a name="l00024"></a>00024 <span class="comment">//</span>
<a name="l00025"></a>00025 <span class="comment">// Outputs:</span>
<a name="l00026"></a>00026 <span class="comment">// --------</span>
<a name="l00027"></a>00027 <span class="comment">// QImage* returned - constructed image</span>
<a name="l00028"></a>00028 <span class="comment">//</span>
<a name="l00029"></a>00029 <span class="comment">// Description:</span>
<a name="l00030"></a>00030 <span class="comment">// ------------</span>
<a name="l00031"></a>00031 <span class="comment">// This method constructs a cropped form of the original image</span>
<a name="l00032"></a>00032 <span class="comment">// within the selected region by simply copying over pixel values.</span>
<a name="l00033"></a>00033 <span class="comment">//----------------------------------------------</span>
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="comment">//==============================================</span>
<a name="l00036"></a><a class="code" href="crop_8h.html#34a3b1a1cf40e0cc8ef3c30da641dac8">00036</a> QImage* <a class="code" href="crop_8cpp.html#34a3b1a1cf40e0cc8ef3c30da641dac8">cropImage</a>( QString filename, QPoint <a class="code" href="redEye__internal_8h.html#6a9aebec61b1a6732045c187a6156f4f">topLeft</a>, QPoint <a class="code" href="redEye__internal_8h.html#75e80edb449bc9a0925be60719132bd0">bottomRight</a> )
<a name="l00037"></a>00037 {
<a name="l00038"></a>00038 <span class="comment">//load original image</span>
<a name="l00039"></a>00039 QImage origImage( filename );
<a name="l00040"></a>00040
<a name="l00041"></a>00041 <span class="comment">//convert to 32-bit depth if necessary</span>
<a name="l00042"></a>00042 <span class="keywordflow">if</span>( origImage.depth() < 32 ) { origImage = origImage.convertDepth( 32, Qt::AutoColor ); }
<a name="l00043"></a>00043
<a name="l00044"></a>00044 <span class="comment">//construct cropped image</span>
<a name="l00045"></a>00045 QImage* croppedImage = <span class="keyword">new</span> QImage(bottomRight.x() - topLeft.x() + 1,
<a name="l00046"></a>00046 bottomRight.y() - topLeft.y() + 1,
<a name="l00047"></a>00047 origImage.depth());
<a name="l00048"></a>00048
<a name="l00049"></a>00049 <span class="comment">//iterate over each selected scanline </span>
<a name="l00050"></a>00050 <span class="keywordtype">int</span> xOrig, yOrig;
<a name="l00051"></a>00051 <span class="keywordtype">int</span> xCropped, yCropped;
<a name="l00052"></a>00052 uchar *origScanLine, *croppedScanLine;
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="keywordflow">for</span>( yOrig=topLeft.y(),yCropped=0; yOrig<=bottomRight.y(); yOrig++, yCropped++)
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056 <span class="comment">//iterate over each selected pixel in scanline</span>
<a name="l00057"></a>00057 origScanLine = origImage.scanLine(yOrig);
<a name="l00058"></a>00058 croppedScanLine = croppedImage->scanLine(yCropped);
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <span class="keywordflow">for</span>( xOrig=topLeft.x(),xCropped=0; xOrig<=bottomRight.x(); xOrig++,xCropped++)
<a name="l00061"></a>00061 {
<a name="l00062"></a>00062 <span class="comment">//copy pixel color from original image to cropped image</span>
<a name="l00063"></a>00063 *((QRgb*)croppedScanLine+xCropped) = *((QRgb*)origScanLine+xOrig);
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065 }
<a name="l00066"></a>00066
<a name="l00067"></a>00067 <span class="comment">//return pointer to cropped image</span>
<a name="l00068"></a>00068 <span class="keywordflow">return</span> croppedImage;
<a name="l00069"></a>00069 }
<a name="l00070"></a>00070 <span class="comment">//==============================================</span>
</pre></div></div>
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distrib
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Mandriva
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2010.0
>
i586
>
media
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contrib-release
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by-pkgid
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4f45e7bdfd4a5ff17f5f8eaab90d017f
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files
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941
