Mac opengl 4.32/15/2023 GL_ARB_compute_shaders, none of which you will get from using Regal on OS X. The three most important extensions (for me at least) from 4.2 & 4.3 of the top of my head would be GL_texture_view, GL_ARB_shader_image_load_store and (* Something of an understatement, Regal's code is quite clever in itself and tries to emulate these features in as efficient a way as possible). still use the 2.1 & earlier fixed-function pipeline) or that make use of the Direct State Access extension API, both of which Regal emulates. ![]() The primary reason to use Regal on the Mac would be to share code with platforms that use a GL 3.2+ Compatibility context (i.e. ![]() Regal merely (*) wraps the platform OpenGL and provides API compatibility for a minority of OpenGL extensions that can be supported by emulating them using the existing platform's features. ![]() Regal will not enable you to access OpenGL 4.2 or 4.3 hardware features that aren't supported by Apple's OpenGL.
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