Re: [ft] anti-aliasing question

[Werner LEMBERG]

> So if I do the below:
> 
> - enable FT_CONFIG_OPTION_SUBPIXEL_RENDERING in ftoption.h
> - call FT_Library_SetLcdFilter with FT_LCD_FILTER_DEFAULT
> - use FT_RENDER_MODE_LCD when calling FT_Render_Glyph
> 
> Then, the result of FT_Render_Glyph will be a 24-bit (8 bits for
> each red,green,blue) color image.

Correct.

> Rendering this as a 24-bit color image will take advantage of
> subpixel rendering and since I called FT_Library_SetLcdFilter it
> will already have been filtered to reduce color fringes.

Yep.  However, remember that the filtering stuff is probably patented.

> Is the above correct?  Or is there some additional filtering I am
> supposed to do other than whats provided by FT_Library_SetLcdFilter?

An important thing is to apply gamma correction, if necessary.  In
particular, black on white needs a different gamma compared to white
on black.


    Werner