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-rw-r--r--silx/gui/_glutils/Context.py63
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diff --git a/silx/gui/_glutils/Context.py b/silx/gui/_glutils/Context.py
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+# coding: utf-8
+# /*##########################################################################
+#
+# Copyright (c) 2014-2017 European Synchrotron Radiation Facility
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+# ###########################################################################*/
+"""Abstraction of OpenGL context.
+
+It defines a way to get current OpenGL context to support multiple
+OpenGL contexts.
+"""
+
+__authors__ = ["T. Vincent"]
+__license__ = "MIT"
+__date__ = "25/07/2016"
+
+
+# context #####################################################################
+
+
+def _defaultGLContextGetter():
+ return None
+
+_glContextGetter = _defaultGLContextGetter
+
+
+def getGLContext():
+ """Returns platform dependent object of current OpenGL context.
+
+ This is useful to associate OpenGL resources with the context they are
+ created in.
+
+ :return: Platform specific OpenGL context
+ :rtype: None by default or a platform dependent object"""
+ return _glContextGetter()
+
+
+def setGLContextGetter(getter=_defaultGLContextGetter):
+ """Set a platform dependent function to retrieve the current OpenGL context
+
+ :param getter: Platform dependent GL context getter
+ :type getter: Function with no args returning the current OpenGL context
+ """
+ global _glContextGetter
+ _glContextGetter = getter