On desktop this saves about 50 kB in symbols. Was done for Vulkan
already, this follows that (two years later). I need this in order to
solve the problem of static globals being unique across shared libs, and
it sounded better to export just one symbol instead of 689.
GL has an extension, but only for ES, not on desktop. Vulkan has
nothing yet (due to there being just ARM that implements it, no other
vendor), except those being listed in a KTX format specification.
Those are now also available under WebGL 1/2 and OpenGL ES 3.O (strangely
not OpenGL ES 2.0) under EXT_texture_compression_{rgtc,bptc}. The GL names
are extra weird-ass now that all other APIs use the BC names.
This fixes a conflicting definition of GLsizeiptr and GLintptr when
Magnum is combined with qopengl.h from Qt on Windows. Khronos has it as
`signed long int`, whereas qopengl.h as ptrdiff_t, which is just `int`.
Just added them to the list, nothing integrated or implemented yet. Also
added some more stuff into OpenGL mapping table, as I apparently forgot
some entries.
It is superseded by core functionality. The only annoyance is that you
need to use TextureFormat::SRGB in ES2 and TextureFormat::SRGB8 in ES3,
but that's with many other formats anyway. Also apparently the unsized
format is still allowed in core desktop GL, which is a shame.
Currently just regenerated the stock headers using flextGL, reducing
line count a bit. No dynamic extension loading or function pointers yet,
trying to make as little changes as possible.