Figuring out how to replace GLXPixmap and GLXDrawable with EGLSurface (or the appropriate equivalent)

[berylline]

This is a note for how this is supposed to be carried out:

GLXPixmap --> EGLSurface (or the appropriate equivalent)

GLXDrawable --> EGLSurface (or the appropriate equivalent)

TBD.

Links for reference:

https://registry.khronos.org/OpenGL/specs/gl/glx1.4.pdf

https://stackoverflow.com/questions/60795622/xlibs-window-vs-glxs-glxwindow-confusion

[berylline]

Based off of the following paragraph from the GLX 1.4 specification in Chapter 2(GLX Operation), 2.1(Rendering Contexts and Drawing Surfaces), it looks like it won't be too hard to convert GLXDrawables(including GLXPixmaps and GLXWindows) to EGLSurfaces since it refers to Drawables(especially and including GLXDrawables) as being "rendering surfaces" or "drawing surfaces":

"The OpenGL specification is intentionally vague on how a rendering context (an
abstract OpenGL state machine) is created. One of the purposes of GLX is to pro-
vide a means to create an OpenGL context and associate it with a drawing surface.
In X, a rendering surface is called a Drawable. X provides two types of
Drawables: Windows which are located onscreen and Pixmaps which are
maintained offscreen. The GLX equivalent to a Window is a GLXWindow and
the GLX equivalent to a Pixmap is a GLXPixmap. GLX introduces a third
type of drawable, called a GLXPbuffer, for which there is no X equivalent.
GLXPbuffers are used for offscreen rendering but they have different seman-
tics than GLXPixmaps that make it easier to allocate them in non-visible frame
buffer memory."