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import os
from . import logger
def fix_osmesa_gl_lib():
"""
When using OSMesa, the gl functions (from libGL) are included
in libOSMesa.so. This function modifies the VISPY_GL_LIB env variable
so gl2 picks up libOSMesa.so as the OpenGL library.
This modification must be done before vispy.gloo is imported for the
first time.
"""
if 'VISPY_GL_LIB' in os.environ:
logger.warning('VISPY_GL_LIB is ignored when using OSMesa. Use '
'OSMESA_LIBRARY instead.')
os.environ['VISPY_GL_LIB'] = os.getenv('OSMESA_LIBRARY', 'libOSMesa.so')
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