QImage and "raw" grey scale

[high_flyer]

So, after simplifying even more this is my code:

void convert16to8mono(QImage &qimage,unsigned short *inBuff, int sizeBytes, unsigned char *outBuff)
{
       qimage.setNumColors(1);
	qimage.setColor(0,qRgb(255,0,0));
 
	for(int y=0,i=0;y<960; y++)
		for(int x=0; x<1280; x++,i++)
		{
			qimage.setPixel(x,y,0);
		}
}

void convert16to8mono(QImage &qimage,unsigned short *inBuff, int sizeBytes, unsigned char *outBuff)
{
       qimage.setNumColors(1);
	qimage.setColor(0,qRgb(255,0,0));

	for(int y=0,i=0;y<960; y++)
		for(int x=0; x<1280; x++,i++)
		{
			qimage.setPixel(x,y,0);
		}
}

To copy to clipboard, switch view to plain text mode 

and I use it like that:

QPixmap pixmap(1280,960);
QImage qimage(1280,960,QImage::Format_Indexed8);
convert16to8mono(qimage,buff,size*2,buff8);
if(!qimage.isNull())
pixmap.fromImage(qimage);
 
ui.lblImage->setPixmap(pixmap);

QPixmap pixmap(1280,960);
QImage qimage(1280,960,QImage::Format_Indexed8);
convert16to8mono(qimage,buff,size*2,buff8);
if(!qimage.isNull())
pixmap.fromImage(qimage);
		
ui.lblImage->setPixmap(pixmap);

To copy to clipboard, switch view to plain text mode 

result is a uniform gray image, instead of a red image....

I am at a loss to what I still might be doing wrong...

EDIT:
I solved it.
As always the problem ist between the chair and keyboard.
I forgot that fromImage returns the new pixmap, and not changing the calling object.

Thanks for helping.

[wysota]

Hi Dani,

Ah... I think I see the problem. QPixmap::fromImage() is a static method returning a pixmap, thus it should be:

QPixmap px = QPixmap::fromImage(qimage);

QPixmap px = QPixmap::fromImage(qimage);

To copy to clipboard, switch view to plain text mode 

So the problem is not with the image, but with the pixmap you try to convert it to.

[high_flyer]

hehe - I just saw it by my self as you where posting your answer

Thanks!