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00012 #include <qimage.h>
00013 #include <qstring.h>
00014 #include <qapplication.h>
00015 #include <math.h>
00016
00017
00018 #include "painting.h"
00019 #include "manipulationOptions.h"
00020 #include "../../gui/statusWidget.h"
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00058
00059 struct Triplet
00060 { int r,g,b; };
00061
00062 struct Histogram
00063 {
00064
00065 Triplet values[256];
00066
00067
00068 Triplet highestCountIndex;
00069 };
00070
00071 Histogram histogram;
00072
00073 void resetHistogram()
00074 {
00075 static int i;
00076 for(i=0;i<256;i++)
00077 {
00078 histogram.values[i].r = 0;
00079 histogram.values[i].g = 0;
00080 histogram.values[i].b = 0;
00081 }
00082 histogram.highestCountIndex.r = 0;
00083 histogram.highestCountIndex.g = 0;
00084 histogram.highestCountIndex.b = 0;
00085 }
00086
00087 void findHighestCounts()
00088 {
00089 static int i;
00090 for(i = 1; i<256; i++)
00091 {
00092 if( histogram.values[i].r > histogram.values[ histogram.highestCountIndex.r ].r )
00093 { histogram.highestCountIndex.r = i; }
00094
00095 if( histogram.values[i].g > histogram.values[ histogram.highestCountIndex.g ].g )
00096 { histogram.highestCountIndex.g = i; }
00097
00098 if( histogram.values[i].b > histogram.values[ histogram.highestCountIndex.b ].b )
00099 { histogram.highestCountIndex.b = i; }
00100 }
00101 }
00102
00103 QImage* oilPaintingEffect( QString filename, ManipulationOptions* options )
00104 {
00105
00106 QImage originalImage( filename );
00107
00108
00109 if( originalImage.depth() < 32 ) { originalImage = originalImage.convertDepth( 32, Qt::AutoColor ); }
00110
00111
00112 bool useBusyIndicators = false;
00113 StatusWidget* status = NULL;
00114 if( options != NULL && options->getStatus() != NULL )
00115 {
00116 useBusyIndicators = true;
00117 status = options->getStatus();
00118 }
00119
00120
00121 if(useBusyIndicators)
00122 {
00123 QString statusMessage = qApp->translate( "oilPaintingEffect", "Applying Oil Painting Effect:" );
00124 status->showProgressBar( statusMessage, 100 );
00125 qApp->processEvents();
00126 }
00127
00128
00129 const int updateIncrement = (int) ( 0.01 * originalImage.width() * originalImage.height() );
00130 int newProgress = 0;
00131
00132
00133 QImage* editedImage = new QImage( filename );
00134
00135
00136 if( editedImage->depth() < 32 )
00137 {
00138 QImage* tmp = editedImage;
00139 editedImage = new QImage( tmp->convertDepth( 32, Qt::AutoColor ) );
00140 delete tmp; tmp=NULL;
00141 }
00142
00143
00144 double minDimen = (double) QMIN( editedImage->width(), editedImage->height() );
00145 const int RADIUS = (int) QMAX( 2, (sqrt(minDimen)/4) );
00146
00147
00148 int originalImageX, originalImageY;
00149 int editedImageX, editedImageY;
00150 int clampedX, clampedY;
00151 int trailingEdgeY, leadingEdgeY;
00152
00153 QRgb* rgb;
00154 uchar* scanLine;
00155 uchar* trailingScanLine;
00156 uchar* leadingScanLine;
00157
00158
00159 for( editedImageX=0; editedImageX < editedImage->width(); editedImageX++)
00160 {
00161
00162
00163 resetHistogram();
00164
00165
00166 for(originalImageY = 0 - 1 - RADIUS;
00167 originalImageY <= 0 - 1 + RADIUS;
00168 originalImageY++)
00169 {
00170 clampedY = QMAX( QMIN( originalImageY, originalImage.height() - 1 ), 0 );
00171 scanLine = originalImage.scanLine( clampedY );
00172
00173 for(originalImageX = editedImageX - RADIUS;
00174 originalImageX <= editedImageX + RADIUS;
00175 originalImageX++)
00176 {
00177 clampedX = QMAX( QMIN( originalImageX, originalImage.width() - 1 ), 0 );
00178
00179
00180 rgb = ((QRgb*)scanLine+clampedX);
00181
00182
00183 histogram.values[ qRed(*rgb) ].r++;
00184 histogram.values[ qGreen(*rgb) ].g++;
00185 histogram.values[ qBlue(*rgb) ].b++;
00186 }
00187 }
00188
00189
00190
00191 for( editedImageY=0; editedImageY < editedImage->height(); editedImageY++)
00192 {
00193 trailingEdgeY = QMAX( QMIN( editedImageY-1-RADIUS, originalImage.height() - 1 ), 0 );
00194 leadingEdgeY = QMAX( QMIN( editedImageY+RADIUS, originalImage.height() - 1 ), 0 );
00195
00196 trailingScanLine = originalImage.scanLine( trailingEdgeY );
00197 leadingScanLine = originalImage.scanLine( leadingEdgeY );
00198
00199 for(originalImageX = editedImageX - RADIUS;
00200 originalImageX <= editedImageX + RADIUS;
00201 originalImageX++)
00202 {
00203 clampedX = QMAX( QMIN( originalImageX, originalImage.width() - 1 ), 0 );
00204
00205
00206 rgb = ((QRgb*)trailingScanLine+clampedX);
00207 histogram.values[ qRed(*rgb) ].r--;
00208 histogram.values[ qGreen(*rgb) ].g--;
00209 histogram.values[ qBlue(*rgb) ].b--;
00210
00211
00212 rgb = ((QRgb*)leadingScanLine+clampedX);
00213 histogram.values[ qRed(*rgb) ].r++;
00214 histogram.values[ qGreen(*rgb) ].g++;
00215 histogram.values[ qBlue(*rgb) ].b++;
00216 }
00217
00218
00219 findHighestCounts();
00220
00221
00222
00223 scanLine = editedImage->scanLine( editedImageY );
00224 rgb = ((QRgb*)scanLine+editedImageX);
00225 *rgb = qRgb( (qRed(*rgb) + histogram.highestCountIndex.r) / 2,
00226 (qGreen(*rgb) + histogram.highestCountIndex.g) / 2,
00227 (qBlue(*rgb) + histogram.highestCountIndex.b) / 2 );
00228
00229
00230
00231 if(useBusyIndicators)
00232 {
00233 newProgress++;
00234 if(newProgress >= updateIncrement)
00235 {
00236 newProgress = 0;
00237 status->incrementProgress();
00238 qApp->processEvents();
00239 }
00240 }
00241
00242 }
00243 }
00244
00245
00246 return editedImage;
00247 }
00248