Qt-interest Archive, March 2002
How to print the contents of a QPixmap ?
Message 1 in thread
Dear all,
I try to print a QPixmap and I don't know why it doesn't work !
First I have done :
#ifndef QT_NO_PRINTER
if ( printer->setup( this ) ) {
bitBlt(printer, 0, 0, Page);
}
#endif
But when I have execute this I got :
bitBlt: Cannot bitBlt to device type 3
So I have re-read examples and I have write this :
int i,j;
QPainter p;
#ifndef QT_NO_PRINTER
if ( printer->setup( this ) ) {
p.begin( printer );
i = p.viewport().width();
j = p.viewport().height();
// to verify if there is not a pb of space
// pw and ph are globals variable with the sizes of my pixmap
printf("printer viewport : %dx%d - Page : %dx%d\n", i, j, pw, ph);
bitBlt(printer, 0, 0, Page);
p.end();
}
#endif
No error but I get a blank page !
Even with a printer->newPage() after the bitBlt it is not better !
It possible to print the contents of a pixmap ?
Thank you very much
Patrick
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Message 2 in thread
> p.begin( printer );
> i = p.viewport().width();
> j = p.viewport().height();
> // to verify if there is not a pb of space
> // pw and ph are globals variable with the sizes of my pixmap
> printf("printer viewport : %dx%d - Page : %dx%d\n", i, j, pw, ph);
> bitBlt(printer, 0, 0, Page);
> p.end();
Try
paint.drawPixmap(0,0,Page);
instead of bitBlt. If this work then the problem is in bitBlt (maybe different color depth, in this case bitBlt does nothing as mentioned in the documentation)
Jacek
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