Re: [PyOpenGL-Users] draw using pycairo on glut interface

[Chris B. <chr...@no...>]

On Sun, Apr 22, 2012 at 7:40 AM, Alejandro Segovia <as...@gm...> wrote:

> I don't have experience with Cairo, but either if it's a software or
> GPU-based renderer,

There was talk of a real GPU-based Cairo back-end, but it never got far.

However, there is (was) a "OpenGL" back-end that used the software
renderer, and dumped the image to OPenGL as a texture. If it isn't
funcional, it wouldn't be hard to do, as Alejandro points out.

-Chris



 there might be a way to capture its output and use it as
> a texture.
>
> If Cairo is software based, check to see if you can have it render to a byte
> array or color matrix, then (after proper formatting) use that to create a
> 2D texture.
>
> If Cairo is GPU-based, and it uses OpenGL, you should be able to have it
> render to a FBO (with a texture color attachment) or Pbuffer.
>
> Once you have a texture, you can map it on a quad or a triangle fan aligned
> to the screen. Results will be better if you use an Orthographic projection.
>
> I hope these ideas help. If anyone knows about Cairo, please do weight in :)
>
> Best,
> Alejandro.-
>
> 2012/4/21 Prashant Saxena <ani...@ya...>
>>
>> Hi,
>>
>> Is it possible to draw using pycairo on glut interface? For example,
>> drawing a cairo gradient surface.
>> I would appreciate if some one can show some light on this topic.
>>
>> Cheers
>>
>> Prashant
>>
>>
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>
>
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>
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