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Re: PdfDraw, custom DPI request + my fix [message #58827 is a reply to message #58818]

Thu, 15 September 2022 10:59

mirek
Messages: 14267
Registered: November 2005

Ultimate Member

OK, that is misunderstanding and the problem is elsewhere.

Image::GetSize returns "pixel size" without taking account of DPI (or any other physical dimension).

Now there is Image::GetDots, which returns the size of image in "dots", where dot which is basically 600DPI pixel. Everything in U++ Draw related code that deals with physical dimensions is in dots, including all dimensions in PdfDraw.

Long story short, if you use GetDots instead of GetSize here, it will work as you needed.

Just for reference, to be sure I have tested with this code:

GUI_APP_MAIN
{
	for(const char *fn : { "C:/upp/MyApps/6x9_300dpi.png", "C:/upp/MyApps/6x9_600dpi.png" }) {
		Image img = StreamRaster::LoadFileAny(fn);
		Size isz = img.GetDots();
		DDUMP(isz);
	
		PdfDraw draw(isz.cx, isz.cy);
	
		draw.DrawImage(0, 0, isz.cx, isz.cy, img);
	
		SaveFile("D:/xxx/" + GetFileTitle(fn) + ".pdf", draw.Finish());
	}
}

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