[Bf-taskforce25] Fix for partial buffer swaps

[Diego Hernan Borghetti]

On Sat, 27 Dec 2008, Ton Roosendaal wrote:

> Hi,
>
> Interesting discovery! It doesn't belong there in the code though. :)
> Further it's a MS extension, apparently availble in some (most?) linux
> distros.
>
> It should be added, via glew, in wm_window.c I guess, either for every
> swap_buffers, either on window creation or resize? No idea, someone
> should test this.
> Brecht, can you try this line on some locations, via glew:
>
> glAddSwapHintRectWIN( 0, 0, win->sizex, win->sizey);
>
> While searching I found this too:
> http://www.opengl.org/registry/specs/OML/glx_swap_method.txt
>
> We should set GLX_SWAP_METHOD_OML to GLX_SWAP_COPY_OML
>
> Diego, can you check that, also correctly using extensions?

Yes, I have to leave right now, but I go to check this night.

>
> -Ton-
>
> ------------------------------------------------------------------------
> Ton Roosendaal  Blender Foundation   ton at blender.org    www.blender.org
> Blender Institute BV  Entrepotdok 57A  1018AD Amsterdam The Netherlands
>
> On 26 Dec, 2008, at 23:21, Domino Marama wrote:
>
>> I've attached a patch which fixes a problem with IBM cards on Windows
>> and ATI on Linux (maybe more too) where the complete back buffer is
>> copied rather than just the changed portion. The problem comes because
>> the GLX spec does not state whether glXSwapBuffers() takes the scissor
>> rectangle into account, so it can't be trusted to specify the update
>> area.
>>
>> I removed the previous IBM workaround as this method should work for
>> all
>> affected opengl implementations (as long as the GL_WIN_swap_hint
>> extension is available).
>>
>> <bufferswap.patch>_______________________________________________
>> Bf-taskforce25 mailing list
>> Bf-taskforce25 at blender.org
>> http://lists.blender.org/mailman/listinfo/bf-taskforce25
>
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-- 
 			Diego