On Sat, Aug 11, 2012 at 5:00 PM, Taylor Gordon <[email protected]>wrote:
> You have to link the SwapBuffers method in the wgl module. Add the line:
>
> SwapBuffers = _link_function('SwapBuffers', BOOL, [HDC], None)
>
> On Monday, July 30, 2012 12:03:12 AM UTC-7, Andreas Schiefer wrote:
>
>> On Thu, Jul 26, 2012 at 8:10 PM, Taylor Gordon <[email protected]>
>> wrote:
>> > Moreover, if I replace the wglSwapLayerBuffers call with the
>> > more standard SwapBuffers call, everything works correctly (60fps).
>>
>> What have you changed exactly to get it working with SwapBuffers?
>> I tried replacing the line
>> wgl.wglSwapLayerBuffers(self.canvas.hdc, wgl.WGL_SWAP_MAIN_PLANE)
>> with
>> wgl.SwapBuffers(self.canvas.hdc)
>>
>> But I always get the error
>> pyglet.gl.lib.MissingFunctionException: SwapBuffers is not
>> exported by the available OpenGL driver.
>> with current Nvidia and Intel drivers.
>>
>> This may of course be a bug in pyglets wrapper or be related to the
>> dynamic linking issue Andre pointed out, but I'm curious how you got
>> it working?
>>
> --
>
>
Ah, but there is more fun for this issue:
1. There's also a GDI function SwapBuffers, which seems to be the
recomended way, see
http://www.opengl.org/discussion_boards/showthread.php/127145-How-to-use-wglSwapBuffers
http://msdn.microsoft.com/en-us/library/dd369060(v=vs.85)
http://bugs.winehq.org/show_bug.cgi?id=5310
It is not currently binded in pyglet, but you can use this GDI flavor by:
1. En pyglet\libs\win32\__init__.py , near the line 99, add the lines
_gdi32.SwapBuffers.restype = BOOL
_gdi32.SwapBuffers.argtypes = [HDC]
2. in pyglet\gl\win32.py, class Win32Context, method .flip(), replace the
line
wgl.wglSwapLayerBuffers(self.canvas.hdc, wgl.WGL_SWAP_MAIN_PLANE)
by
_gdi32.SwapBuffers(self.canvas.hdc)
Now, If there were a small script demoing the defect it would be easier to
evalute solutions.
Note also that the first link does some remarks about vsync issues.
claudio
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