Re: [ft] anti-aliasing question

[Dave Calkins]

> I'm referring to the third parameter of FT_Set_Transform, but you
> should also check your OpenGL transform matrices and the texture
> sampling mode.
>
>    

I am applying a GL transform to position the text, but the appearance of 
the text is not affected by whether or not that happens.  I'm not aware 
of any transform being supplied to FreeType.

I'm using a 2D GL texture and the coord system is setup so that 1 world 
unit == 1 pixel and I'm rendering 2D text in the plane of the screen.  
So there should always be a 1-to-1 for the pixels and the texture so I 
don't think any texture filtering is being done.

The code calls FT_Render_Glyph and then uses the resultant gray-scale 
rendered bitmap as input to setting up a GL 2D texture.  The contents of 
this 2D texture are treated as the alpha channel when rendering a 
colored rect which results in the colored text being drawn.

> If that fails, could you perhaps attach some sample
> renderings in png format?
>
>
>    
I've attached 2 screenshots, one rendered with GDI and the other with 
FreeType using FreeTypeGL.  On each screenshot I've also zoomed into the 
rendered text.

These were rendered with "Lucida Sans Unicode", 8pts, at 96dpi.

The FreeTypeGL rendered text looks "fuzzy"/"blurry"/etc. when compared 
with the GDI which is what we'd like to adjust.

FreeTypeGL.png
Description: PNG image

GDI.png
Description: PNG image