[Freetype] gray_raster_render

[Nir Rostoker]

Hi! 

I'm trying to render texts in different colors, the banal option is to write
a function that will changer the colors in the bitmap after calling
Render_Glpyh() function. The "price" will be of course greater rendering
time, since the bitmap needs to be changed. 

I have seen in FT a function called gray_raster_render() in ftgrays.c, which
as far as I understand allow me as well to render texts with different
colors.

Does the usage of gray_raster_render() would be better than using my own
"wrapper" ? 
Is there influence on the glyph quality (assuming I use the same range of
colors, for instance , instead of 256 gray levels, 256 red levels) ? 

Does anyone can recommend me of the best way to control the text color ?

Thanks,
Nir