If the user creates a context with
EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR set,
must Mesa return a context of *exactly* that version. For example, if the user
requests
a 3.0 context with the forward-compatible bit set, is Mesa required to return a
3.0
context but not allowed to return a 3.1 context?
Here's the pertinent portion of the EGL_KHR_create_context spec. Perhaps I'm
interpreting
the keywords "specific" and "exactly" too strictly. How do you interpret this?
Because the purpose of forward-compatible contexts is to allow
application development on a specific OpenGL version with the
knowledge that the app will run on a future version, context
creation will fail if
EGL_CONTEXT_OPENGL_FORWARD_COMPATIBLE_BIT_KHR is set and the
context version returned cannot implement exactly the requested
version.
Do we know what the other vendors do (Intel Windows, Nvidia, AMD)?
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