The current rendering engine is set up to use the same DPI setting for both the horizontal and vertical axis. So it isn’t possible to render an image with an asymmetrical DPI, however, it is possible to get the same effect though by stretching the page.
Here’s some pseudo code that shows how to do this:
QP.LoadFromFile("FaxTest-Letter.pdf", ""); QP.RenderPageToFile(204, 1, 5, "same-dpi.png"); // Get the original size of the page double OriginalWidth = QP.PageWidth(); double OriginalHeight := QP.PageHeight(); // Add a new page QP.NewPage(); // Work out the asymmetrical scaling double NewWidth = OriginalWidth; double NewHeight = OriginalHeight * 196 / 204; // Set the dimensions of the new page QP.SetPageDimensions(NewWidth, NewHeight); // Capture the original page (it will be removed // from the document automatically) int CaptureID = QP.CapturePage(1); // Set the original to the top-left corner QP.SetOrigin(1); // Draw the captured page onto the new page QP.DrawCapturedPage(CaptureID, 0, 0, NewWidth, NewHeight); // Render the page QP.RenderPageToFile(204, 1, 5, "different-dpi.png"); |