Image background - render html on top of existing image with whatever currently exist but it cannot have transparent pixels, (RenderToImage method where the first argument is html string) Of the background color, GDI text rendering will be used. Solid color background - generate an image where the background is filled with solid color and all the html is rendered on top HtmlRender supports both GDI and GDI+ text rendering to accommodate different needs, GDI+ text rendering methods have "GdiPlus" suffixīecause of GDI text rendering issue with alpha channel clear type text rendering rendering to image requires special handling.
GDI+ is newer, device independent so work better for printers but is slower and looks worse on monitors. GDI is older, has better performance and looks better on standard monitors but doesn't support alpha channel for transparency. Windows supports two text rendering technologies: GDI and GDI+.
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