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List:       kde-cygwin
Subject:    Re: QBitmap problems
From:       Peter_Kümmel <syntheticpp () gmx ! net>
Date:       2005-01-26 14:52:41
Message-ID: 41F7AEB9.3020500 () gmx ! net
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Chris January wrote:

> why the final composite image looks incorrect.

I can't see a incorrectness? Attached my code.

Peter

["main.cpp" (text/plain)]

/****************************************************************************
**
** QBitmap test program
**
*****************************************************************************/

#include <qapplication.h>
#include <qwidget.h>
#include <qbitmap.h>
#include <qpaintdevice.h>
#include <qpainter.h>


#include "standrews.xbm"
#include "stpatricks.xbm"
#include "stgeorges.xbm"
#include "stgeorges_mask.xbm"


class QBitmapWidget : public QWidget {
public:
	QBitmapWidget () : QWidget () 
	{
		standrews =		*new QBitmap (108, 70, (const uchar *) standrews_bits, true);
		stpatricks =	*new QBitmap (108, 70, (const uchar *) stpatricks_bits, true);
		stgeorges =		*new QBitmap (108, 70, (const uchar *) stgeorges_bits, true);
		stgeorges_mask = *new QBitmap (108, 70, (const uchar *) stgeorges_mask_bits, true);

		standrews_masked = standrews;
		standrews_masked.setMask (standrews_masked);

		stpatricks_masked = stpatricks;
		stpatricks_masked.setMask (stpatricks_masked);

		stgeorges_masked = stgeorges;
		stgeorges_masked.setMask (stgeorges_masked);

		setMinimumSize (324, 210);
	}

protected:
	void paintEvent ( QPaintEvent *e ) 
	{
		QPainter p (this);
//		p.setBrush (Qt::white);
//		p.eraseRect (e->rect ());

#if 0
		QBitmap copy = standrews;
		p.setPen (Qt::blue);
		//copy.setMask (stgeorges_mask);
		//copy.setMask (QBitmap ());
		copy.detach();
		p.drawPixmap (QPoint (10, 10), copy);

#else
		
		p.setPen (Qt::blue);	p.drawPixmap (QPoint (0, 0),	standrews);
		p.setPen (Qt::black);	p.drawPixmap (QPoint (0, 70),	standrews);
		p.setPen (Qt::blue);	p.drawPixmap (QPoint (0, 140),	standrews_masked);
		
		p.setPen (Qt::red);		p.drawPixmap (QPoint (108, 0),	stpatricks);
		p.setPen (Qt::black);	p.drawPixmap (QPoint (108, 70),	stpatricks);
		p.setPen (Qt::red);		p.drawPixmap (QPoint (108, 140),stpatricks_masked);
		
		p.setPen (Qt::red); 	p.drawPixmap (QPoint (216, 0),	stgeorges);
		p.setPen (Qt::black);	p.drawPixmap (QPoint (216, 70), stgeorges_mask);
		p.setPen (Qt::red);		p.drawPixmap (QPoint (216, 140),stgeorges_masked);

		p.setPen (Qt::blue);	p.drawPixmap (QPoint (324, 0),	standrews);
		p.setPen (Qt::red);		p.drawPixmap (QPoint (324, 0),	stpatricks);
								p.drawPixmap (QPoint (324, 0),	stgeorges);
		p.setPen (Qt::black);	p.drawPixmap (QPoint (324, 70), standrews);
								p.drawPixmap (QPoint (324, 70), stpatricks);
								p.drawPixmap (QPoint (324, 70), stgeorges_mask);
								//p.drawPixmap (QPoint (324, 70), stgeorges);
		p.setPen (Qt::blue);	p.drawPixmap (QPoint (324, 140),standrews_masked);
		p.setPen (Qt::red);		p.drawPixmap (QPoint (324, 140),stpatricks_masked);
								p.drawPixmap (QPoint (324, 140),stgeorges_masked);
								
#endif
	}
private:
	QBitmap standrews, stpatricks, stgeorges, stgeorges_mask;
	QBitmap standrews_masked, stpatricks_masked, stgeorges_masked;
};

/*
QBitmap QBitmapWidget::standrews = QBitmap (108, 70, (const uchar *) standrews_bits, true);
QBitmap QBitmapWidget::stpatricks = QBitmap (108, 70, (const uchar *) stpatricks_bits, true);
QBitmap QBitmapWidget::stgeorges = QBitmap (108, 70, (const uchar *) stgeorges_bits, true);
QBitmap QBitmapWidget::stgeorges_mask = QBitmap (108, 70, (const uchar *) stgeorges_mask_bits, true);
*/

int main( int argc, char **argv )
{
    QApplication a(argc,argv);
   	
	QBitmapWidget w;
	a.setMainWidget( &w );
	w.resize(430, 210 );
	w.show();

    return a.exec();
}




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