vertexbuffer : added TexCoordExt, which is the same as TexCoord but means "use vec4 for TexCoord"

when a stream is not found in the vertex declaration at bind time.

empty vertex declarations even though many video card
drivers do not support them — and they should.

with a null argument, and the texture stuff was completely messed up.

calls so that they take a number of vertices or indexes, not elements.

will not try to use X11.

attributes if GL version isn't 3.0 at least.

functions; also remove a lot of idiotic "using namespace std" from the
codebase.

want to normalise them to floats.

because we don't know yet how to disable them selectively.

and letting the user guess what happened. This doesn't prevent us from
displaying an additional friendly warning later.

the Direct3D backend.

creation failures.

needs to know about Direct3D headers etc.

wrong offset computations.

class, so that the calling code does not need to know what the backend is.

According to David Turner, “it should be the only thing that NDK users
should be testing again.”

Implement GetMouseCount() to query the number of mice on the system.

tested wherever relevant.