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With a TIFF preview, each EPS file's PNG thumbnail is now the preview averaged down to the thumbnail's size and composited on white, so export and Save draw the page once instead of twice. The thumbnail keeps the size a 128 px render of the page has; a page that fits in 128 px gets the preview's own pixels. Without a preview the thumbnail is still drawn. - Rendered::area_resized averages premultiplied pixels over the area under each new pixel, weighting edge pixels by the share they cover, and returns an error for a 0 side or a buffer that does not match.