Re: OpenGL, xserver, and anti-aliased fonts

http://gltt.sourceforge.net/about.html

is also a nice lib which draws xft fonts in opengl

Ely Levy
System group
Hebrew University
Jerusalem Israel



On Thu, 4 Mar 2004, Carl Worth wrote:

> On Mar 5, catach-m/[email protected] wrote:
>  > I'm not sure of the current state of the OpenGL libraries in this new xserver,
>
> There was a lot of discussion last November/December about how to
> re-architect the X server so that it can sit on top of OpenGL rather
> than custom video drivers. I think various people are currently off
> working on different pieces of that puzzle.
>
>  > so thought i'd better ask :) A topic I am considering researching that i'm told
>  > was discussed here earlier (although i couldn't find it in the mail archives)
>  > is using the OpenGL pipeline and GPU to accelerate anti-aliased
>  > font rendering.
>
> In January, Marcelo E. Magallon pointed out the FTGL library which
> uses FreeType with OpenGL:
>
> 	http://freedesktop.org/pipermail/xserver/2004-January/000624.html
>
>  > Specifically what i want to know is if this new xserver has enough GL support
>  > already included to be able to do such development and testing/benchmarking
>  > (can you tell i don't really know what i'm talking about yet? :) ). Would it be
>  > worth an in depth look at Cairo and it's anti aliased text for such a project? Cairo
>  > does anti aliased text inside software and texture memory, correct?
>
> Cairo just uses FreeType to render glyphs, and then composites those
> glyphs using one of its backends, (eg. XRender or OpenGL). The first
> two screenshots from the following page:
>
> 	http://www.cs.umu.se/~c99pnn/twiki/bin/view/Main/Screenshots
>
> show that with either the Xrender or OpenGL backend, text is
> antialiased, (though in this case geometric shapes are only
> antialiased in the XRender screenshot).
>
> -Carl
>
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