#compatibility-profile

Core-profile OpenGL context with compatibility-era GLSL shaders: which mixes are actually portable?

Our rendering layer loads shaders authored at different times, some declaring #version 330 core and others written against older GLSL that relies on legacy built-ins and compatibility-profile state. We now create the context explicitly with a version and profile mask, but we are unsure how strict we must be at the boundary between the context profile and the