This is the same extension that we all know and love but under a different name with some different requirements.
In regular OpenGL fashion, you can't just move a desktop OpenGL extension to OpenGL ES without ratifying a new extension, which is why this falls
under a EXT extension, which in turn causes it to have suffixes attached to their function names.
This is the first step in our way towards conquering all mobile GPUs that don't support desktop OpenGL, hopefully we also can add support for
buffer_storage to OpenGL ES as well so we can make full use of this extension.
This wasn't too much of a concern since we normally don't care about this feature set, but it is nice when testing on new devices and they don't
support the higher feature sets but want to run under software renderer.
The Mesa softpipe and PowerVR 5xx drivers don't support higher GL versions, but they shouldn't exit out just because they couldn't get a GL3 function
pointer that isn't even going to be used at that point.
This noticeably includes GL_ARB_get_program_binary, which was previously
thought unsupported on OS X. Well, actually, the OS X implementation is
trivial and reports 0 binary formats (as of 10.10; this is hardcoded in
GLEngine, by the way), but at least it'll work if it's fixed someday.
We need to pull in function pointers for OpenGL 3.0 in order to use glAttribIPointer.
This isn't too big of an issue, and this code will be gone in the future when we change over to libepoxy.
Just need to push code upstream to libepoxy to support Android with GLES and GL first.
If there is an issue with a reported extension, disable it instead of failing out entirely.
Fixes an issue with buffer_storage that I had overlooked as well.
This changes from using logical and to bitwise and, which causes the compile time to drop from an absurd amount of time to around five seconds on my
crappy laptop.
The only two devices that do this are Mesa software rasterizer and Intel Ironlake(With a few hacks).
Basically since it doesn't support OpenGL 3.0, it can't grab the version the new way.
So failing that, it sets to GL 2.1, and continues.
Further along, on Ironlake at least, it tries grabbing the extensions the new GL 3.0 way and fails.
So have a fallback that grabs the extensions string the old way, in probably the most elegant way possible.
gl.h and glext.h provide most of the function pointer typedefs and defines for extensions and core features.
The only one it doesn't provide is GL 1.1 function typedefs, but this is to be expected.
If anything needs defines or typedefs in their header in the future, that's as easy as before.
add the GL include (back) to Base.props
use a similar technique to GLX.cpp (by Sonic) in WGL.cpp to get
wglSwapIntervalEXT without the WGLEW check
Conflicts:
Source/Core/VideoBackends/OGL/OGL.vcxproj
Source/Core/VideoBackends/OGL/OGL.vcxproj.filters
Source/VSProps/Base.props
