[eq-dev] How to readback more than Color and depth buffers?

[Stefan Eilemann]

On Thu, May 8, 2008 at 4:19 PM, 常辉 <rick.changhui at gmail.com> wrote:

> Hi,
> Our current works need to readback more pixel data other than color and
> depth, just like normal or diffuse color to compositing remotely.


I understand that you want to read back floating point FBO's, right?


>
> I've browsed source codes in client lib, but in my oppinion, the two
> eq::Image::Pixel objects '_colorPixels' and '_depthPixels' restrict the
> readable pixel data to no more than 64 bits totally.
> Could anybody give some advice about how to readback frame data more than
> 64bits/pixel and how to readback pixel data by the methods other than
> 'glReadPixels', must we rewrite the eq::Image class completely?


Please extend the Image class to support the format and types you need, and
send me the patch. It was just needed so far.

Regarding glReadPixels: What do you have in mind? I've experimented with
PBO's, but it is #ifdef'd out right now.


HTH,

Stefan.
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