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<title>AlbumShaper: blackWhite.cpp File Reference</title>
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<h1>blackWhite.cpp File Reference</h1><code>#include <qimage.h></code><br>
<code>#include <qstring.h></code><br>
<code>#include <qapplication.h></code><br>
<code>#include "<a class="el" href="blackWhite_8h_source.html">blackWhite.h</a>"</code><br>
<code>#include "<a class="el" href="manipulationOptions_8h_source.html">manipulationOptions.h</a>"</code><br>
<code>#include "<a class="el" href="statusWidget_8h_source.html">../../gui/statusWidget.h</a>"</code><br>
<p>
<div class="dynheader">
Include dependency graph for blackWhite.cpp:</div>
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<a href="blackWhite_8cpp_source.html">Go to the source code of this file.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">QImage * </td><td class="memItemRight" valign="bottom"><a class="el" href="blackWhite_8cpp.html#81188751080c22115720554f1ce6a30f">blackWhiteEffect</a> (QString filename, <a class="el" href="classManipulationOptions.html">ManipulationOptions</a> *options)</td></tr>
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<hr><h2>Function Documentation</h2>
<a class="anchor" name="81188751080c22115720554f1ce6a30f"></a><!-- doxytag: member="blackWhite.cpp::blackWhiteEffect" ref="81188751080c22115720554f1ce6a30f" args="(QString filename, ManipulationOptions *options)" -->
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<td class="memname">QImage* blackWhiteEffect </td>
<td>(</td>
<td class="paramtype">QString </td>
<td class="paramname"> <em>filename</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classManipulationOptions.html">ManipulationOptions</a> * </td>
<td class="paramname"> <em>options</em></td><td> </td>
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<td>)</td>
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<p>Definition at line <a class="el" href="blackWhite_8cpp_source.html#l00060">60</a> of file <a class="el" href="blackWhite_8cpp_source.html">blackWhite.cpp</a>.</p>
<p>References <a class="el" href="redEye__internal_8h_source.html#l00037">editedImage</a>, <a class="el" href="manipulationOptions_8h_source.html#l00021">ManipulationOptions::getStatus()</a>, <a class="el" href="statusWidget_8cpp_source.html#l00119">StatusWidget::incrementProgress()</a>, <a class="el" href="redEye__internal_8h_source.html#l00031">newProgress</a>, <a class="el" href="statusWidget_8cpp_source.html#l00089">StatusWidget::showProgressBar()</a>, <a class="el" href="redEye__internal_8h_source.html#l00021">status</a>, and <a class="el" href="redEye__internal_8h_source.html#l00028">updateIncrement</a>.</p>
<p>Referenced by <a class="el" href="editingInterface_8cpp_source.html#l00834">EditingInterface::applyEffect()</a>, and <a class="el" href="pointillism_8cpp_source.html#l00109">pointillismEffect()</a>.</p>
<div class="fragment"><pre class="fragment"><a name="l00061"></a>00061 {
<a name="l00062"></a>00062 <span class="comment">//load image</span>
<a name="l00063"></a>00063 QImage* <a class="code" href="redEye__internal_8h.html#63116a8b94b4ed0e99ddcb7f6f3bd919">editedImage</a> = <span class="keyword">new</span> QImage( filename );
<a name="l00064"></a>00064
<a name="l00065"></a>00065 <span class="comment">//convert to 32-bit depth if necessary</span>
<a name="l00066"></a>00066 <span class="keywordflow">if</span>( editedImage->depth() < 32 )
<a name="l00067"></a>00067 {
<a name="l00068"></a>00068 QImage* tmp = editedImage;
<a name="l00069"></a>00069 editedImage = <span class="keyword">new</span> QImage( tmp->convertDepth( 32, Qt::AutoColor ) );
<a name="l00070"></a>00070 <span class="keyword">delete</span> tmp; tmp=NULL;
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="comment">//determine if busy indicators will be used</span>
<a name="l00074"></a>00074 <span class="keywordtype">bool</span> useBusyIndicators = <span class="keyword">false</span>;
<a name="l00075"></a>00075 <a class="code" href="classStatusWidget.html">StatusWidget</a>* <a class="code" href="redEye__internal_8h.html#65b682074aef9e63bb1dad48c3e9e9df">status</a> = NULL;
<a name="l00076"></a>00076 <span class="keywordflow">if</span>( options != NULL && options-><a class="code" href="classManipulationOptions.html#9bc4d4123333012b705b599043406e68">getStatus</a>() != NULL )
<a name="l00077"></a>00077 {
<a name="l00078"></a>00078 useBusyIndicators = <span class="keyword">true</span>;
<a name="l00079"></a>00079 status = options-><a class="code" href="classManipulationOptions.html#9bc4d4123333012b705b599043406e68">getStatus</a>();
<a name="l00080"></a>00080 }
<a name="l00081"></a>00081
<a name="l00082"></a>00082 <span class="comment">//setup progress bar</span>
<a name="l00083"></a>00083 <span class="keywordflow">if</span>(useBusyIndicators)
<a name="l00084"></a>00084 {
<a name="l00085"></a>00085 QString statusMessage = qApp->translate( <span class="stringliteral">"blackWhiteEffect"</span>, <span class="stringliteral">"Applying Black + White Effect:"</span> );
<a name="l00086"></a>00086 status-><a class="code" href="classStatusWidget.html#57d461014070b9d651c36bd157cab9c1" title="Initializes the progress bar.">showProgressBar</a>( statusMessage, 100 );
<a name="l00087"></a>00087 qApp->processEvents();
<a name="l00088"></a>00088 }
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="comment">//update progress bar for every 1% of completion</span>
<a name="l00091"></a>00091 <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="redEye__internal_8h.html#32598f506d413f48cda8e1c930dae6b3">updateIncrement</a> = (int) ( 0.01 * editedImage->width() * editedImage->height() );
<a name="l00092"></a>00092 <span class="keywordtype">int</span> <a class="code" href="redEye__internal_8h.html#caa08422437cae250a76ca488cbe1567">newProgress</a> = 0;
<a name="l00093"></a>00093
<a name="l00094"></a>00094 <span class="comment">//iterate over each selected scanline </span>
<a name="l00095"></a>00095 <span class="keywordtype">int</span> x, y, grayValue;
<a name="l00096"></a>00096 QRgb* rgb;
<a name="l00097"></a>00097 uchar* scanLine;
<a name="l00098"></a>00098 <span class="keywordflow">for</span>( y=0; y<editedImage->height(); y++)
<a name="l00099"></a>00099 {
<a name="l00100"></a>00100 <span class="comment">//iterate over each selected pixel in scanline</span>
<a name="l00101"></a>00101 scanLine = editedImage->scanLine(y);
<a name="l00102"></a>00102 <span class="keywordflow">for</span>( x=0; x<editedImage->width(); x++)
<a name="l00103"></a>00103 {
<a name="l00104"></a>00104 <span class="comment">//compute gray value based on the display luminance of color coordinates</span>
<a name="l00105"></a>00105 rgb = ((QRgb*)scanLine+x);
<a name="l00106"></a>00106 grayValue = (int) (0.2125*qRed(*rgb) + 0.7154*qGreen(*rgb) + 0.0721*qBlue(*rgb));
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="comment">//clamp to ensure it falls in the 0-255 range</span>
<a name="l00109"></a>00109 grayValue = QMIN( QMAX( grayValue, 0 ), 255 );
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="comment">//set pixel channel values using computed gray value</span>
<a name="l00112"></a>00112 *rgb = qRgb( grayValue, grayValue, grayValue );
<a name="l00113"></a>00113
<a name="l00114"></a>00114 <span class="comment">//update status bar if significant progress has been made since last update</span>
<a name="l00115"></a>00115 <span class="keywordflow">if</span>(useBusyIndicators)
<a name="l00116"></a>00116 {
<a name="l00117"></a>00117 newProgress++;
<a name="l00118"></a>00118 <span class="keywordflow">if</span>(newProgress >= updateIncrement)
<a name="l00119"></a>00119 {
<a name="l00120"></a>00120 newProgress = 0;
<a name="l00121"></a>00121 status-><a class="code" href="classStatusWidget.html#de18735223ae40506c32c96b9c9c5476" title="Updates the progress bar by one step.">incrementProgress</a>();
<a name="l00122"></a>00122 qApp->processEvents();
<a name="l00123"></a>00123 }
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127 }
<a name="l00128"></a>00128
<a name="l00129"></a>00129 <span class="comment">//return pointer to edited image</span>
<a name="l00130"></a>00130 <span class="keywordflow">return</span> editedImage;
<a name="l00131"></a>00131 }
</pre></div>
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distrib
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Mandriva
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2010.0
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i586
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media
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contrib-release
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by-pkgid
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4f45e7bdfd4a5ff17f5f8eaab90d017f
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