This is a very basic implementation of glGetfloatv. It will only give a
result when used with GL_MODELVIEW_MATRIX. In the future
we can update and extend it's functionality.
Textures are now initialized with a nullptr upon generation.
They are only actually created once they are bound to a target.
Currently only the GL_TEXTURE_2D target is supported.
The software rasterizer now allows rendering with or without
a bound TEXTURE_2D.
There is some really wild stuff going on in the OpenGL spec for this..
The Khronos website states that GLsizei is a 32-bit non-negative value
used for sizes, however, some functions such as `glGenTextures` state
that the input `n` could be negative, which implies signage. Most other
implementations of `gl.h` seem to `typedef` this to `int` so we should
too.
This commit implements glGenLists(), glNewList(), glDeleteLists(), and
glCallList().
The 'compiled' records are implemented as a vector of member function
pointers and tuples containing their arguments, and a mechanism is
implemented to allow the recorded calls to copy-capture values from the
time of the call; this is currently only used with glLoadMatrix.
This implements `glGetError` and correctly sets the state machine's
error macro (similar to LibC `errno`) when an invalid operation is
performed. This is reset on completion of a successful operation.
This currently (obviously) doesn't support any actual 3D hardware,
hence all calls are done via software rendering.
Note that any modern constructs such as shaders are unsupported,
as this driver only implements Fixed Function Pipeline functionality.
The library is split into a base GLContext interface and a software
based renderer implementation of said interface. The global glXXX
functions serve as an OpenGL compatible c-style interface to the
currently bound context instance.
Co-authored-by: Stephan Unverwerth <s.unverwerth@gmx.de>
