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Re: Accessing back buffer

>> Is there any hack to get the ptr and rowbytes to the OpenGL back
>> buffer?
>
> Typically, the back buffer is not even in memory you can access.

You're right: I always forget about memory protection: my app won't have
direct access to VRAM anyway...

> You
> can get/set the buffer using Read/DrawPixels(), but depending on what
> you want, this will probably be too slow. ReadPixels() is mostly used
> for screenshots. What you should do very much depends on what effect
> you're trying to achieve...?

I was just thinking about performing some operations on the pixels without
using glReadPixels() and glWritePixels() which are truly slow, but let's
forget it :/


_____________________________________________________________

Pierre-Olivier Latour email@hidden
Palo Alto, USA http://www.pol-online.net
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References: 
 >Re: Accessing back buffer (From: Timothy Wayper <email@hidden>)



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