[SOLVED] QImage setPixel alpha issue

[bunjee]

Hi,

I'm replacing pixels in a QImage using that code :

for (int i = 0; i < height; i++)
	{
		for (int j = 0; j < width; j++)
		{
			int alpha = qAlpha(image.pixel(j, i));
			if (alpha > 0)
			{
				image.setPixel(j, i,
						qRgba(color.red(),
							  color.green(),
							  color.blue(),
							  alpha));
			}
		}
	}
 
q->QPixmap::operator=(QPixmap::fromImage(image));

for (int i = 0; i < height; i++)
	{
		for (int j = 0; j < width; j++)
		{
			int alpha = qAlpha(image.pixel(j, i));
			if (alpha > 0)
			{
				image.setPixel(j, i,
						qRgba(color.red(),
							  color.green(),
							  color.blue(),
							  alpha));
			}
		}
	}

q->QPixmap::operator=(QPixmap::fromImage(image));

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My image file is a PNG file.

For some reason, everytime I replace a "transparent" pixel. The pixel goes black instead of the choosen color. Plain pixels are replaced fine.

Any idea ?