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#!/bin/sh
# MESA_GLSL_VERSION_OVERRIDE
#
# changes the value returned by glGetString(GL_SHADING_LANGUAGE_VERSION). Valid
# values are integers, such as "130". Mesa will not really implement all the
# features of the given language version if it's higher than what's normally
# reported. (for developers only)
# MESA_GL_VERSION_OVERRIDE
#
# changes the value returned by glGetString(GL_VERSION) and possibly the GL API
# type. The format should be MAJOR.MINOR[FC|COMPAT]
#
# FC is an optional suffix that indicates a forward compatible context.
# This is only valid for versions >= 3.0.
#
# COMPAT is an optional suffix that indicates a compatibility context or
# GL_ARB_compatibility support. This is only valid for versions >= 3.1.
#
# GL versions <= 3.0 are set to a compatibility (non-Core) profile
#
# GL versions = 3.1, depending on the driver, it may or may not have the
# ARB_compatibility extension enabled.
#
# GL versions >= 3.2 are set to a Core profile
#
# Examples: 2.1, 3.0, 3.0FC, 3.1, 3.1FC, 3.1COMPAT, X.Y, X.YFC, X.YCOMPAT.
# 2.1 - select a compatibility (non-Core) profile with GL version 2.1.
# 3.0 - select a compatibility (non-Core) profile with GL version 3.0.
# 3.0FC - select a Core+Forward Compatible profile with GL version 3.0.
# 3.1 - select GL version 3.1 with GL_ARB_compatibility enabled per the driver default.
# 3.1FC - select GL version 3.1 with forward compatibility and GL_ARB_compatibility disabled.
# 3.1COMPAT - select GL version 3.1 with GL_ARB_compatibility enabled.
# X.Y - override GL version to X.Y without changing the profile.
# X.YFC - select a Core+Forward Compatible profile with GL version X.Y.
# X.YCOMPAT - select a Compatibility profile with GL version X.Y.
#
# Mesa may not really implement all the features of the given version. (for
# developers only)
MESA_GL_VERSION_OVERRIDE=3.3 MESA_GLSL_VERSION_OVERRIDE=330 ./gix
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