On Thu, Nov 21, 2019 at 8:29 AM Behdad Esfahbod <beh...@behdad.org> wrote: > I like to compose multiple glyphs in a bitmap without using any graphics library. I found that FT_Bitmap_Blend() does exactly what I want except that if none of the glyphs are color, it still promotes the image to a color bitmap. > > Would be nice to have another version that would only upgrade to color if necessary.
I think you just want to integrate (colorless) coverage values. Why do you call that blending? So I wonder why don't you merge outlines and render them at once. This might actually be faster. Therefore, please do not create "colorless" FT_Bitmap_Blend, which is nonsense. You should have a separate function for that unless I misunderstood you. Alexei
