imagemodify2.cpp

Linux下用kde编制的程序

/* imagemodify2.cpp */
#include <kapp.h>
#include <qpainter.h>
#include <qimage.h>
#include <qcolor.h>
#include "imagemodify2.h"

#include "logo.xpm"

int main(int argc,char **argv)
{
    KApplication app(argc,argv,"imagemodify2");
    ImageModify2 imagemodify2;
    imagemodify2.show();
    app.setMainWidget(&imagemodify2);
    return(app.exec());
}
ImageModify2::ImageModify2(QWidget *parent,const
        char *name) : QWidget(parent,name)
{
    logo = QPixmap(magick);
    QImage image = logo.convertToImage();
	if(image.numColors() > 0) {
		for(int i=0; i<image.numColors(); i++) {
			QRgb rgbOrig = image.color(i);
			QRgb rgbMod = rgbModify(rgbOrig);
			image.setColor(i,rgbMod);
		}
	} else {
		for(int x=0; x<image.width(); x++) {
			for(int y=0; y<image.height(); y++) {
				QRgb rgbOrig = image.pixel(x,y);
				QRgb rgbMod = rgbModify(rgbOrig);
				image.setPixel(x,y,rgbMod);
			}
		}
	}
    modlogo.convertFromImage(image,ThresholdDither);
    setFixedSize(514,303);
}
QRgb ImageModify2::rgbModify(QRgb rgb) {
	int alpha = rgb & 0xFF000000;
	int average = qGreen(rgb) + qRed(rgb) + qBlue(rgb);
	average /= 3;
	QRgb rgbMod = qRgb(average,average,average);
	rgbMod |= alpha;
	return(rgbMod);
}
void ImageModify2::paintEvent(QPaintEvent *)
{
    QPainter p(this);

    p.drawPixmap(0,0,logo);
    p.drawPixmap(257,0,modlogo);
}