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Code: Alles auswählen

class myImage : public QImage
{
	public:
		myImage();
		myImage(int width, int height, Format format);
		myImage operator+ (myImage &rechts);
};

Code: Alles auswählen

myImage::myImage()
{}

myImage::myImage(int w, int h, Format f)
: QImage(w, h, f)
{}

myImage myImage::operator+ (myImage &rhs)
{
	if(height() != rhs.height())
	{
		qDebug() << "myImage operator+ : height != rhs.height!";
		return *this;
	}

	myImage erg(
		width() + rhs.width(),
		height(),
		QImage::Format_ARGB32
	);

	int i;
	for(i=0; i < height(); ++i)
	{
		QRgb* thisPtr = (QRgb*)    scanLine(i);
		QRgb* ergPtr  = (QRgb*)erg.scanLine(i);
		QRgb* rhsPtr  = (QRgb*)rhs.scanLine(i); // nur korrekt mit i-1

		// eine Zeile kopieren
		int j;
		for(j=0; j < width(); ++j) // zuerst die Daten links
			ergPtr[j] = thisPtr[j];
		for(; j < width() + rhs.width(); ++j) // dann rechts
			ergPtr[j] = rhsPtr[j];
	}
	return erg;
}


int main(int argc, char** argv)
{
	QApplication app(argc, argv);

	myImage img1, img2;
	if(!(img1.load("./1.png") && img2.load("./2.png")))
	{
		qDebug() << "konnte keine Bilder laden!";
		exit(1);
	}

	qDebug() << "img1.width():" << img1.width() << "img1.height():" << img1.height();
	qDebug() << "img2.width():" << img2.width() << "img2.height():" << img2.height();

	myImage tmp = img1 + img2;
	bool success = tmp.save("neu.png");
	qDebug() << success;

	return 0;//app.exec();
}