FR: Wrangle a comprehensive set of OpenGL functions & macros

[parawave]

Nice change! All the openGLContext references are gone. Looks much cleaner now.

I know you’re probably busy, but can you give your opinion on this matter?

Looking at a window library like GLFW it seems they all use wglCreateContextAttribsARB to create the GL context on Windows. Why is it that juce_OpenGL_win32.h only uses wglCreateContext ?

Here the GLFW implementation using it:
https://github.com/glfw/glfw/blob/master/src/wgl_context.c

Also more information in this recent post here

Some OpenGL functions not available in Windows?

I’m not 100% sure, since I never tested it myself. On Windows all OpenGL functions are provided via the wgl context functions. I think the one used in JUCE loads one of the oldest GL versions (2.1?) possible. This call is used: Now isn’t it necessary to explicitly request a higher GL version (e.g. 3.1) to actually load the newer GL functions? It seems for this purpose the WGL_ARB_create_context extension is provided. Similar to the pixel format extension, you have to query/load the extension…

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I can’t find much information about what wgl actually does under the hood and what version it is and how it’s related to the GPU vendor drivers. And how it’s releated to the loaded GL functions and version. Could loading a newer wgl context with this extension improve the stability of GL on windows?