#include <qimage.h>
#include <qstring.h>
#include <qapplication.h>
#include "sepia.h"
#include "../../gui/statusWidget.h"
Include dependency graph for sepia.cpp:
Go to the source code of this file.
Functions | |
QImage * | sepiaEffect (QString filename, StatusWidget *status) |
|
Definition at line 53 of file sepia.cpp. References editedImage, StatusWidget::incrementProgress(), newProgress, StatusWidget::showProgressBar(), status, and updateIncrement. Referenced by EditingInterface::applyEffect(). 00054 { 00055 //load image 00056 QImage* editedImage = new QImage( filename ); 00057 00058 //determine if busy indicators will be used 00059 bool useBusyIndicators = (status != NULL); 00060 00061 //setup progress bar 00062 if(useBusyIndicators) 00063 { 00064 QString statusMessage = qApp->translate( "sepiaEffect", "Applying Sepia Effect:" ); 00065 status->showProgressBar( statusMessage, 100 ); 00066 qApp->processEvents(); 00067 } 00068 00069 //update progress bar for every 1% of completion 00070 const int updateIncrement = (int) ( 0.01 * editedImage->width() * editedImage->height() ); 00071 int newProgress = 0; 00072 00073 //compute the hsl/hsv coordinates of sepia color 00074 int sepiaH, sepiaS, sepiaL; 00075 QColor(162,128,101).getHsv( &sepiaH, &sepiaS, &sepiaL ); 00076 00077 //iterate over each selected scanline 00078 int x, y, pixelLuminance; 00079 QRgb* rgb; 00080 QColor sepiaColor; 00081 uchar* scanLine; 00082 00083 for( y=0; y<editedImage->height(); y++) 00084 { 00085 //iterate over each selected pixel in scanline 00086 scanLine = editedImage->scanLine(y); 00087 for( x=0; x<editedImage->width(); x++) 00088 { 00089 //compute gray value based on the display luminance of color coordinates 00090 rgb = ((QRgb*)scanLine+x); 00091 pixelLuminance = (int)(0.3*qRed(*rgb) + 0.59*qGreen(*rgb) + 0.11*qBlue(*rgb)); 00092 00093 //compute and set sepia color 00094 sepiaColor.setHsv( sepiaH, sepiaS, pixelLuminance ); 00095 *rgb = sepiaColor.rgb(); 00096 00097 //update status bar if significant progress has been made since last update 00098 if(useBusyIndicators) 00099 { 00100 newProgress++; 00101 if(newProgress >= updateIncrement) 00102 { 00103 newProgress = 0; 00104 status->incrementProgress(); 00105 qApp->processEvents(); 00106 } 00107 } 00108 00109 } 00110 } 00111 00112 //return pointer to edited image 00113 return editedImage; 00114 }
|