#include <qimage.h>
#include <qstring.h>
#include <qapplication.h>
#include <math.h>
#include "emboss.h"
#include "manipulationOptions.h"
#include "../tools/imageTools.h"
#include "../../gui/statusWidget.h"
Include dependency graph for emboss.cpp:
Go to the source code of this file.
Functions | |
| QImage * | embossEffect (QString filename, ManipulationOptions *options) |
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Definition at line 82 of file emboss.cpp. References b, editedImage, ManipulationOptions::getStatus(), HSVtoRGB(), StatusWidget::incrementProgress(), newProgress, RGBtoHSV(), StatusWidget::showProgressBar(), status, and updateIncrement. Referenced by EditingInterface::applyEffect(). 00083 {
00084 //load original image
00085 QImage originalImage( filename );
00086
00087 //convert to 32-bit depth if necessary
00088 if( originalImage.depth() < 32 ) { originalImage = originalImage.convertDepth( 32, Qt::AutoColor ); }
00089
00090 //create edited image
00091 QImage* editedImage = new QImage( filename );
00092
00093 //convert to 32-bit depth if necessary
00094 if( editedImage->depth() < 32 )
00095 {
00096 QImage* tmp = editedImage;
00097 editedImage = new QImage( tmp->convertDepth( 32, Qt::AutoColor ) );
00098 delete tmp; tmp=NULL;
00099 }
00100
00101 //determine if busy indicators will be used
00102 bool useBusyIndicators = false;
00103 StatusWidget* status = NULL;
00104 if( options != NULL && options->getStatus() != NULL )
00105 {
00106 useBusyIndicators = true;
00107 status = options->getStatus();
00108 }
00109
00110 //setup progress bar
00111 if(useBusyIndicators)
00112 {
00113 QString statusMessage = qApp->translate( "embossEffect", "Applying Emboss Effect:" );
00114 status->showProgressBar( statusMessage, 100 );
00115 qApp->processEvents();
00116 }
00117
00118 //update progress bar for every 1% of completion
00119 const int updateIncrement = (int) ( 0.01 * originalImage.width() * originalImage.height() );
00120 int newProgress = 0;
00121
00122 //iterate over each selected scanline
00123 int x, y;
00124 QRgb* rgb;
00125 uchar* scanLine;
00126
00127 int yPrev, yNext, xPrev, xNext;
00128
00129 //compute the radius using image resolution
00130 double minDimen = (double) QMIN( editedImage->width(), editedImage->height() );
00131 const int embossRadius = (int) QMAX( 1, (sqrt(minDimen)/8) );
00132
00133 for( y=0; y<editedImage->height(); y++)
00134 {
00135 scanLine = originalImage.scanLine(y);
00136
00137 //compute previous and next y pixel coordinates
00138 yPrev = QMAX( y-embossRadius, 0 );
00139 yNext = QMIN( y+embossRadius, editedImage->height() - 1 );
00140
00141 //iterate over each selected pixel in scanline
00142 for( x=0; x<editedImage->width(); x++)
00143 {
00144 //compute previous and next x pixel coordinates
00145 xPrev = QMAX( x-embossRadius, 0 );
00146 xNext = QMIN( x+embossRadius, editedImage->width() - 1 );
00147
00148 //start with a default luminance of 128 (50% luminance)
00149 int sum = 128;
00150
00151 //sum weighted gray values of neighbors
00152 scanLine = originalImage.scanLine( yPrev );
00153 sum-= qGray( *((QRgb*)scanLine + xPrev ) );
00154 sum-= qGray( *((QRgb*)scanLine + x ) );
00155
00156 scanLine = originalImage.scanLine( y );
00157 sum-= qGray( *((QRgb*)scanLine + xPrev ) );
00158 sum+= qGray( *((QRgb*)scanLine + xNext ) );
00159
00160 scanLine = originalImage.scanLine( yNext );
00161 sum+= qGray( *((QRgb*)scanLine + x ) );
00162 sum+= qGray( *((QRgb*)scanLine + xNext ) );
00163
00164 //clamp sum to within 0-255 range
00165 sum = QMAX( QMIN( sum, 255), 0 );
00166
00167 //get original pixel color in HSV space
00168 scanLine = editedImage->scanLine(y);
00169 rgb = ((QRgb*)scanLine+x);
00170 double r = ((double)qRed(*rgb) )/255.0;
00171 double g = ((double)qGreen(*rgb) )/255.0;
00172 double b = ((double)qBlue(*rgb) )/255.0;
00173
00174 //convert to hsv
00175 double h,s,v;
00176 RGBtoHSV(r,g,b,&h,&s,&v);
00177
00178 //reset v
00179 v = ((double)sum)/255;
00180
00181 //convert adjusted color back to rgb colorspace and clamp
00182 HSVtoRGB( &r,&g,&b, h,s,v);
00183 int rp = (int) QMIN( QMAX((r*255), 0), 255 );
00184 int gp = (int) QMIN( QMAX((g*255), 0), 255 );
00185 int bp = (int) QMIN( QMAX((b*255), 0), 255 );
00186
00187 //set adjusted color value
00188 *rgb = qRgb(rp,gp,bp);
00189
00190 //update status bar if significant progress has been made since last update
00191 if(useBusyIndicators)
00192 {
00193 newProgress++;
00194 if(newProgress >= updateIncrement)
00195 {
00196 newProgress = 0;
00197 status->incrementProgress();
00198 qApp->processEvents();
00199 }
00200 }
00201
00202 }
00203 }
00204
00205 //return pointer to edited image
00206 return editedImage;
00207 }
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1.3.9.1