How to handle images in a proper way by rendering from QPdfDocument
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Dear all,
I want to extract an image from a PDF document. The PDF document page is the following:
using the QPdfDocument class I rendered an image using
QPdfDocument pdf;
pdf.load("test.pdf");
const int n = 0;
QImage qimg = pdf.render(n,pdf.pageSize(n).toSize());
qimg = qimg.convertToFormat(QImage::Format_RGB888);The rendered image looks like:
Extracting the image's alpha channel by using
QImage alpha = qimg.convertToFormat(QImage::Format_Alpha8);
alpha.invertPixels(QImage::InvertRgba);I get:
As mentioned in an earlier post I just want to render an image of the PDF page that looks the same as the pdf page itsself, no fancy stuff. I guess I somehow have to combine or convert the upper both images. I'd be grateful if someone has an idea of how to get things done.
Cheers