Re: Emulate D3D9's StretchRect

For a heads up, nvidia doesn't have a driver that supports this 
extension for WinXP.
Does anyone know if this extension will ever see the light of day on 
Linux or Mac OS X? Those are the platforms I need it on. Windows uses 
can just run the dx9 version of our game.

Or is this extension an integrated part of OpenGL 2.0?

- Ray

Ray Ratelis wrote:
> Thanks. I assume I can attach a texture to a framebuffer object and then 
> set the read framebuffer to 0 and the draw framebuffer to the one with 
> the attached texture and then use the framebuffer_blit function to copy 
> the main buffer into the texture.
> 
> My video card driver doesn't have the framebuffer_blit extension, 
> though. I'll see if the more recent driver has it. I'm using a Geforce 
> Go 7600 on a laptop.
> 
> - Ray
> 
> Michael I Gold wrote:
>> You want this:
>>
>>     http://www.opengl.org/registry/specs/EXT/framebuffer_blit.txt
>>
>>
>> Ray Ratelis wrote:
>>> I'm porting some code from D3D9 to OpenGL and the D3D9 version uses 
>>> StretchRect to copy the frame buffer (which is usually non pow2) into 
>>> a pow2 texture. How would I do this in OpenGL?
>>>
>>> One way I was thinking of was to CopyTexImage2D into a non-pow2 
>>> texture rectangle and then use a pow2 offscreen-context (the same 
>>> size as my destination pow2 texture) to render the texture rectangle 
>>> into using a simple quad. Then I would CopyTexImage2D into my 
>>> destination pow2 texture. That sounds horribly inefficient. Is there 
>>> a better way?
>>>
>>> This will happen a few times per frame, so I don't want to copy the 
>>> background buffer to system memory and do a scale there.
>>>
>>> Any ideas are helpful.
>>>
>>> - Ray
>>> ----- FAQ and OpenGL Resources at:
>>>  http://www.geocities.com/SiliconValley/Hills/9956/OpenGL
>>>
>> ----- FAQ and OpenGL Resources at: 
>> http://www.geocities.com/SiliconValley/Hills/9956/OpenGL -- Author: 
>> Michael I Gold INET: [email protected] Fat City Hosting, San Diego, 
>> California -- http://www.fatcity.com 
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> ----- FAQ and OpenGL Resources at:
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> 
----- 
FAQ and OpenGL Resources at:
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-- 
Author: Ray Ratelis
  INET: [email protected]

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