- iOS is treated the same way than Android now. The only difference
is that iOS only provides prototypes and no typedef, whereas
Android only provides typedefs and no prototypes.
- Timer queries is core in GL and an extension on all versions of
GLES. On iOS it's not available at the header level. An additional
subtlety is that glGetObjectuiv is core in GLES 3.0, so it conflicts
with the extension.
So, now we do things correctly:
- on desktop we use the core methods
- on ios we ifdef out everything related to timer queries
- on gles 2.0 and up we use only the extension entry-points
- Remove DefaultPlatform from public headers
DefaultPlatform is now PlatormFactory and is just an implementation
detail.
- VulkanPlatform is now public
- Improvements to the OpenGLPlatform interface
- Cleanup PlatformEGL and PlatformEGLAndroid
Also:
- reworked how external image worked so that all the implementation
is contained in the Platform and no dependency to the backend is
needed.
- MetalPlatform is now entirely private and final
This is because MetalPlatform wasn't an interface. We probably need one
so it could be customized in the future. But as it stands now it's
better to be private.
