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RE: [Freetype] improving render quality
From: |
Turner David |
Subject: |
RE: [Freetype] improving render quality |
Date: |
Thu, 22 Jan 2004 15:03:16 +0100 |
Hello Steve,
> -----Original Message-----
> From: address@hidden
> [mailto:address@hidden
> Behalf Of Steve Dekorte
> Sent: Friday, January 16, 2004 10:05 PM
> To: address@hidden
> Subject: [Freetype] improving render quality
>
>
>
> Attached is an image of the same font (LucidaGrande) rendered on the
> left with FreeType and on the right with the native OSX font
> renderer.
> Notice how the OSX version is cleaner and smoother?
Well, this is a very subjective statement. Some people will prefer
the left image undoubtedly. I know I do :-)
> Is there any way I can get the FreeType version to look as
> good? Perhaps by tweaking some smoothing options? (I have
> access to the source code)
>
The best way is the following:
- disable hinting when loading glyph images (for those who
didn't realize it, MacOS X doesn't perform hinting at all
by default !!)
- filter the resulting image with a convolution kernel
to make the image sharper / more contrasted if you need
to
- don't forget to use gamma-corrected alpha-blending when
drawing text on your target surfaces.
this should get you very, very close to what MacOS X gives
you. Extra points for finding the ideal convolution kernel
(i.e. fast to implement while giving good quality)
Regards,
- David Turner
- The FreeType Project (www.freetype.org)
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- RE: [Freetype] improving render quality,
Turner David <=
- RE: [Freetype] improving render quality, Turner David, 2004/01/22
- [Freetype] Certain characters of pbf fonts don't render?, Joris van der Hoeven, 2004/01/22
- Re: [Freetype] Certain characters of pbf fonts don't render?, Jan-Åke Larsson, 2004/01/23
- Re: [Freetype] Certain characters of pbf fonts don't render?, Joris van der Hoeven, 2004/01/23
- Re: [Freetype] Certain characters of pbf fonts don't render?, Joris van der Hoeven, 2004/01/23
- Re: [Freetype] Certain characters of pbf fonts don't render?, Werner LEMBERG, 2004/01/24
- Re: [Freetype] Certain characters of pbf fonts don't render?, Joris van der Hoeven, 2004/01/24
- Re: [Freetype] Certain characters of pbf fonts don't render?, Jan-Åke Larsson, 2004/01/26
- Re: [Freetype] Certain characters of pbf fonts don't render?, Werner LEMBERG, 2004/01/26
- Re: [Freetype] Certain characters of pbf fonts don't render?, Jan-Åke Larsson, 2004/01/26