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# PyEPL: hardware/graphics/screensync/__init__.py
#
# Copyright (C) 2003-2005 Michael J. Kahana
# Authors: Ian Schleifer, Per Sederberg, Aaron Geller, Josh Jacobs
# URL: http://memory.psych.upenn.edu/programming/pyepl
#
# Distributed under the terms of the GNU Lesser General Public License
# (LGPL). See the license.txt that came with this file.
"""
This package implements blocking the monitor's Vertical Blanking Loop.
"""
import os
def initialize(**options):
"""
"""
pass
def finalize():
"""
"""
pass
def linuxSetRefreshBlock(tf):
if tf:
val = "1"
else:
val = "0"
# Set for nVidia linux
os.environ["__GL_SYNC_TO_VBLANK"] = val
# Set for recent linux Mesa DRI Radeon
os.environ["LIBGL_SYNC_REFRESH"] = val
if os.uname()[0]=='Darwin':
import _refreshBlock
setRefreshBlock = _refreshBlock.sync_swap
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