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Asked: 2026-06-09T21:27:21+00:00

OpenGL define its own datatype. Such as GLint or GLsizei . And they are

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OpenGL define its own datatype. Such as GLint or GLsizei. And they are different across platforms. Where can I find limits for the types?

Edit

Added language tag to clarify domain. And I know that GL* types will be resolved into basic C types, but it can be different by platform. (actually that’s why they are defined.) And even basic C types are not guaranteed to be fixed size on any platform. That’s why the limit.h is exist, and I expect there’s also similar thing in GL itself for GL* types because they’re semantically different with C types, and it means they need their own limit definitions.

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  1. Editorial Team

    Assuming you are using C++ you can use std::numeric_limits<GLint>::max() to get the correct maximum value for a type or any other property of the type.

    The spec doesn’t guarantee that GLint is actually an int on any platform but only that it is an at least 32bit wide signed integral type, so MAX_INT is the lower size bound on a platform where int is actually 32 bits wide (e.g. x86_64).

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