[Open-graphics] [Off Topic] efficient 2D lib

[Loris Cuoghi]

Nicolas Boulay ha scritto:
> Hello,
> 
> If i want to use "pure" 2D. What is the fastest choice ? Xlib give
> some very impressive numbers , but it's quite old. Opengl is fast but
> a good 3D card are needed.
> 
> I don't know the speed of SDL. It's look like the "default" choice.
> 

Hi!

SDL is just an higher level library which wraps other APIs like OpenGL
and Xlib, and even audio-related ones like OpenAL. Thus, by "using SDL"
you'd still be choosing among these.

A good-by-today-standards 3D accelerated card is somewhat overpowered
for just *ordinary* 2D drawing. Some old ATI Radeon like a 7000 and
above would be well supported, and a good horse too.

But that would have to be judged by the kind of drawings you would be doing.

> Beside that i know that most of card and old 3D card have some means
> to draw fast 2D primitive without the use of the main cpu. Does a lib
> that use this exist ?
> 

Sure. That's what a recent X11 server does with certain known hardware,
by accelerating Xlib functions (and thus other higher level drawing APIs
like Cairo) by the means of XAA or, where possible, EXA [1] [2].

Check these if you've got time:

[1] http://cairographics.org/
[2] http://lists.freedesktop.org/archives/xorg/2005-June/008356.html
[3] http://wiki.x.org/wiki/ExaStatus

Look up Cairo and EXA on Wikipedia for a quick and simple overview.


Regards,

-- Loris Cuoghi

> Regards,
> Nicolas Boulay
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