X11Drv: move WGL extension code
thunderbird2k at gmx.net
Sun Sep 3 07:07:21 CDT 2006
Here's again an updated version of the patch. I have done some more testing and I hope it compiles correctly on all systems this time. All those different OpenGL libraries, headers, you really get sick of them after a while.
The patch just fixes some minor build issues. I'll also resubmit the next patch as I modified that one aswell.
> This is an updated version of the patch. As noticed by Mike and Chris the
> prototype of glXGetProcAddressARB isn't available on all systems. Further
> this patch improves the detection of pbuffers which causes a regression on
> the dri drivers.
> As you can see in opengl32's Makefile.in and in wgl.c the files wgl_ext.h
> and wgl_ext.c aren't used anymore. Further some code isn't used anymore
> aswell. This dead stuff is removed in the patch ' OpenGL32 remove unused code'
> which still applies but depends on this patch.
> > Hi,
> > First of all sorry for the size of the patch but it can't be made that
> > much smaller. I could perhaps save lets say 200 lines but that's not
> enough to
> > make it 'small'.
> > This patch moves all WGL extension code over to x11drv. Standard OpenGL
> > functions are exported by opengl32 itself or can be loaded using
> > wglGetProcAddress. WGL extensions can only be loaded using this
> function. The WGL
> > extension loading part of this function has been moved over to x11drv
> and all
> > WGL extension had to be moved along. The wgl extension code itself is
> > same as the original code in wgl_ext.c except for small changes in
> things like
> > ENTER_GL.
> > The way WGL extensions are loaded is different. The old code correctly
> > advertised the names of available WGL extensions but the
> > code didn't work correctly. Even if an extension wasn't advertised you
> > get a function pointer to the functions. On Windows wglGetProcAddress
> > return NULL.
> > The patch adds new WGL extension loading code based on code written by
> > old opengl32 -> x11drv patch written by Tomas Carnacky. The code
> > advertises WGL extensions and only returns function pointers when the
> > extension is really available.
> > Further the patch depends on all the other WGL patches I sent.
> > I have tested the code using various OpenGL programs including the now
> > famous World of Warcraft and everything works fine ;)
> > Regards,
> > Roderick Colenbrander
> > --
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