glx: turn LIBGL_ALWAYS_INDIRECT into a boolean
Instead of setting based on set/unset, allow users to use boolean values. In the docs, use `ALWAYS=true` instead of `ALWAYS=1` as it's clearer IMO. Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com> Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
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@@ -59,7 +59,7 @@ to learn if it is thread safe.
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Indirect Rendering
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You can force indirect rendering mode by setting the LIBGL_ALWAYS_INDIRECT
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environment variable. Hardware acceleration will not be used.
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environment variable to `true`. Hardware acceleration will not be used.
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