- These changes now presume that standard OpenGL and OpenGL ES are mutually exclusive. We will NOT support running a standard OpenGL context and an OpenGL ES context in the same process.
- Clients must explicitly request supporting the OpenGL 3D renderer in their build configuration. Build configurations must define ENABLE_OPENGL_STANDARD (replacing the HAVE_OPENGL macro) or ENABLE_OPENGL_ES. If neither macro is defined, then the OpenGL 3D renderer will be assumed unavailable.
- Meson and Autotools now use better header/library checks for OpenGL functionality with their associated context type.
- Add a new Code::Blocks project file that can make builds for CLI, GTK, and GTK2.
- GTK and GTK2 ports now have the option to run a legacy OpenGL context, a 3.2 Core Profile context, or simply choosing the best context automatically like before.
- GTK and GTK2 ports have GLX and EGL as new context types. OSMesa and SDL have been updated to the latest design pattern.
- GTK and GTK2 ports can now be configured (via Meson or Autotools) to use a GLX, OSMesa, EGL, or SDL context.
- OSMesa contexts are now marked as deprecated. I don't know of anyone who still uses them, and I've never been able to get it to work correctly for years. Now that we have GLX contexts for compatibility purposes, OSMesa contexts are now completely redundant.
- Fix a bug with the GTK port where ancient GPUs without FBO support can still run framebuffers at custom sizes.
- For POSIX ports, move all "avout" and context creation files to the "shared" directory for better file organization.
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