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<h1>emboss.h File Reference</h1>
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This graph shows which files directly or indirectly include this file:</div>
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<a href="emboss_8h_source.html">Go to the source code of this file.</a><table border="0" cellpadding="0" cellspacing="0">
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<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="emboss_8h.html#f8d48220a7a9b902041fcae5d6278e04">embossEffect</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="f8d48220a7a9b902041fcae5d6278e04"></a><!-- doxytag: member="emboss.h::embossEffect" ref="f8d48220a7a9b902041fcae5d6278e04" args="(QString filename, ManipulationOptions *options)" -->
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<td class="memname">QImage* embossEffect </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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<p>Definition at line <a class="el" href="emboss_8cpp_source.html#l00082">82</a> of file <a class="el" href="emboss_8cpp_source.html">emboss.cpp</a>.</p>
<p>References <a class="el" href="jpegInternal_8h_source.html#l00125">b</a>, <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="imageTools_8cpp_source.html#l00264">HSVtoRGB()</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="imageTools_8cpp_source.html#l00231">RGBtoHSV()</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>.</p>
<div class="fragment"><pre class="fragment"><a name="l00083"></a>00083 {
<a name="l00084"></a>00084 <span class="comment">//load original image </span>
<a name="l00085"></a>00085 QImage originalImage( filename );
<a name="l00086"></a>00086
<a name="l00087"></a>00087 <span class="comment">//convert to 32-bit depth if necessary</span>
<a name="l00088"></a>00088 <span class="keywordflow">if</span>( originalImage.depth() < 32 ) { originalImage = originalImage.convertDepth( 32, Qt::AutoColor ); }
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="comment">//create edited image</span>
<a name="l00091"></a>00091 QImage* <a class="code" href="redEye__internal_8h.html#63116a8b94b4ed0e99ddcb7f6f3bd919">editedImage</a> = <span class="keyword">new</span> QImage( filename );
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="comment">//convert to 32-bit depth if necessary</span>
<a name="l00094"></a>00094 <span class="keywordflow">if</span>( editedImage->depth() < 32 )
<a name="l00095"></a>00095 {
<a name="l00096"></a>00096 QImage* tmp = editedImage;
<a name="l00097"></a>00097 editedImage = <span class="keyword">new</span> QImage( tmp->convertDepth( 32, Qt::AutoColor ) );
<a name="l00098"></a>00098 <span class="keyword">delete</span> tmp; tmp=NULL;
<a name="l00099"></a>00099 }
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="comment">//determine if busy indicators will be used</span>
<a name="l00102"></a>00102 <span class="keywordtype">bool</span> useBusyIndicators = <span class="keyword">false</span>;
<a name="l00103"></a>00103 <a class="code" href="classStatusWidget.html">StatusWidget</a>* <a class="code" href="redEye__internal_8h.html#65b682074aef9e63bb1dad48c3e9e9df">status</a> = NULL;
<a name="l00104"></a>00104 <span class="keywordflow">if</span>( options != NULL && options-><a class="code" href="classManipulationOptions.html#9bc4d4123333012b705b599043406e68">getStatus</a>() != NULL )
<a name="l00105"></a>00105 {
<a name="l00106"></a>00106 useBusyIndicators = <span class="keyword">true</span>;
<a name="l00107"></a>00107 status = options-><a class="code" href="classManipulationOptions.html#9bc4d4123333012b705b599043406e68">getStatus</a>();
<a name="l00108"></a>00108 }
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <span class="comment">//setup progress bar</span>
<a name="l00111"></a>00111 <span class="keywordflow">if</span>(useBusyIndicators)
<a name="l00112"></a>00112 {
<a name="l00113"></a>00113 QString statusMessage = qApp->translate( <span class="stringliteral">"embossEffect"</span>, <span class="stringliteral">"Applying Emboss Effect:"</span> );
<a name="l00114"></a>00114 status-><a class="code" href="classStatusWidget.html#57d461014070b9d651c36bd157cab9c1" title="Initializes the progress bar.">showProgressBar</a>( statusMessage, 100 );
<a name="l00115"></a>00115 qApp->processEvents();
<a name="l00116"></a>00116 }
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="comment">//update progress bar for every 1% of completion</span>
<a name="l00119"></a>00119 <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="redEye__internal_8h.html#32598f506d413f48cda8e1c930dae6b3">updateIncrement</a> = (int) ( 0.01 * originalImage.width() * originalImage.height() );
<a name="l00120"></a>00120 <span class="keywordtype">int</span> <a class="code" href="redEye__internal_8h.html#caa08422437cae250a76ca488cbe1567">newProgress</a> = 0;
<a name="l00121"></a>00121
<a name="l00122"></a>00122 <span class="comment">//iterate over each selected scanline </span>
<a name="l00123"></a>00123 <span class="keywordtype">int</span> x, y;
<a name="l00124"></a>00124 QRgb* rgb;
<a name="l00125"></a>00125 uchar* scanLine;
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="keywordtype">int</span> yPrev, yNext, xPrev, xNext;
<a name="l00128"></a>00128
<a name="l00129"></a>00129 <span class="comment">//compute the radius using image resolution</span>
<a name="l00130"></a>00130 <span class="keywordtype">double</span> minDimen = (double) QMIN( editedImage->width(), editedImage->height() );
<a name="l00131"></a>00131 <span class="keyword">const</span> <span class="keywordtype">int</span> embossRadius = (int) QMAX( 1, (sqrt(minDimen)/8) );
<a name="l00132"></a>00132
<a name="l00133"></a>00133 <span class="keywordflow">for</span>( y=0; y<editedImage->height(); y++)
<a name="l00134"></a>00134 {
<a name="l00135"></a>00135 scanLine = originalImage.scanLine(y);
<a name="l00136"></a>00136
<a name="l00137"></a>00137 <span class="comment">//compute previous and next y pixel coordinates</span>
<a name="l00138"></a>00138 yPrev = QMAX( y-embossRadius, 0 );
<a name="l00139"></a>00139 yNext = QMIN( y+embossRadius, editedImage->height() - 1 );
<a name="l00140"></a>00140
<a name="l00141"></a>00141 <span class="comment">//iterate over each selected pixel in scanline</span>
<a name="l00142"></a>00142 <span class="keywordflow">for</span>( x=0; x<editedImage->width(); x++)
<a name="l00143"></a>00143 {
<a name="l00144"></a>00144 <span class="comment">//compute previous and next x pixel coordinates</span>
<a name="l00145"></a>00145 xPrev = QMAX( x-embossRadius, 0 );
<a name="l00146"></a>00146 xNext = QMIN( x+embossRadius, editedImage->width() - 1 );
<a name="l00147"></a>00147
<a name="l00148"></a>00148 <span class="comment">//start with a default luminance of 128 (50% luminance)</span>
<a name="l00149"></a>00149 <span class="keywordtype">int</span> sum = 128;
<a name="l00150"></a>00150
<a name="l00151"></a>00151 <span class="comment">//sum weighted gray values of neighbors</span>
<a name="l00152"></a>00152 scanLine = originalImage.scanLine( yPrev );
<a name="l00153"></a>00153 sum-= qGray( *((QRgb*)scanLine + xPrev ) );
<a name="l00154"></a>00154 sum-= qGray( *((QRgb*)scanLine + x ) );
<a name="l00155"></a>00155
<a name="l00156"></a>00156 scanLine = originalImage.scanLine( y );
<a name="l00157"></a>00157 sum-= qGray( *((QRgb*)scanLine + xPrev ) );
<a name="l00158"></a>00158 sum+= qGray( *((QRgb*)scanLine + xNext ) );
<a name="l00159"></a>00159
<a name="l00160"></a>00160 scanLine = originalImage.scanLine( yNext );
<a name="l00161"></a>00161 sum+= qGray( *((QRgb*)scanLine + x ) );
<a name="l00162"></a>00162 sum+= qGray( *((QRgb*)scanLine + xNext ) );
<a name="l00163"></a>00163
<a name="l00164"></a>00164 <span class="comment">//clamp sum to within 0-255 range</span>
<a name="l00165"></a>00165 sum = QMAX( QMIN( sum, 255), 0 );
<a name="l00166"></a>00166
<a name="l00167"></a>00167 <span class="comment">//get original pixel color in HSV space</span>
<a name="l00168"></a>00168 scanLine = editedImage->scanLine(y);
<a name="l00169"></a>00169 rgb = ((QRgb*)scanLine+x);
<a name="l00170"></a>00170 <span class="keywordtype">double</span> r = ((double)qRed(*rgb) )/255.0;
<a name="l00171"></a>00171 <span class="keywordtype">double</span> g = ((double)qGreen(*rgb) )/255.0;
<a name="l00172"></a>00172 <span class="keywordtype">double</span> <a class="code" href="jpegInternal_8h.html#f320905358fa78701e4cc60b6135601f">b</a> = ((double)qBlue(*rgb) )/255.0;
<a name="l00173"></a>00173
<a name="l00174"></a>00174 <span class="comment">//convert to hsv</span>
<a name="l00175"></a>00175 <span class="keywordtype">double</span> h,s,v;
<a name="l00176"></a>00176 <a class="code" href="imageTools_8cpp.html#7769c25727d6caedf20321d238b3828d" title="Convert a RGB color triplet to HSV.">RGBtoHSV</a>(r,g,b,&h,&s,&v);
<a name="l00177"></a>00177
<a name="l00178"></a>00178 <span class="comment">//reset v</span>
<a name="l00179"></a>00179 v = ((double)sum)/255;
<a name="l00180"></a>00180
<a name="l00181"></a>00181 <span class="comment">//convert adjusted color back to rgb colorspace and clamp</span>
<a name="l00182"></a>00182 <a class="code" href="imageTools_8cpp.html#a4ea508b635b1a7648bb5834132d4681" title="Convert a HSV color triplet to RGB.">HSVtoRGB</a>( &r,&g,&b, h,s,v);
<a name="l00183"></a>00183 <span class="keywordtype">int</span> rp = (int) QMIN( QMAX((r*255), 0), 255 );
<a name="l00184"></a>00184 <span class="keywordtype">int</span> gp = (int) QMIN( QMAX((g*255), 0), 255 );
<a name="l00185"></a>00185 <span class="keywordtype">int</span> bp = (int) QMIN( QMAX((b*255), 0), 255 );
<a name="l00186"></a>00186
<a name="l00187"></a>00187 <span class="comment">//set adjusted color value</span>
<a name="l00188"></a>00188 *rgb = qRgb(rp,gp,bp);
<a name="l00189"></a>00189
<a name="l00190"></a>00190 <span class="comment">//update status bar if significant progress has been made since last update</span>
<a name="l00191"></a>00191 <span class="keywordflow">if</span>(useBusyIndicators)
<a name="l00192"></a>00192 {
<a name="l00193"></a>00193 newProgress++;
<a name="l00194"></a>00194 <span class="keywordflow">if</span>(newProgress >= updateIncrement)
<a name="l00195"></a>00195 {
<a name="l00196"></a>00196 newProgress = 0;
<a name="l00197"></a>00197 status-><a class="code" href="classStatusWidget.html#de18735223ae40506c32c96b9c9c5476" title="Updates the progress bar by one step.">incrementProgress</a>();
<a name="l00198"></a>00198 qApp->processEvents();
<a name="l00199"></a>00199 }
<a name="l00200"></a>00200 }
<a name="l00201"></a>00201
<a name="l00202"></a>00202 }
<a name="l00203"></a>00203 }
<a name="l00204"></a>00204
<a name="l00205"></a>00205 <span class="comment">//return pointer to edited image</span>
<a name="l00206"></a>00206 <span class="keywordflow">return</span> editedImage;
<a name="l00207"></a>00207 }
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