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Diffstat (limited to 'src/silx/gui/_glutils/Context.py')
-rw-r--r-- | src/silx/gui/_glutils/Context.py | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/src/silx/gui/_glutils/Context.py b/src/silx/gui/_glutils/Context.py new file mode 100644 index 0000000..c0def5c --- /dev/null +++ b/src/silx/gui/_glutils/Context.py @@ -0,0 +1,76 @@ +# /*########################################################################## +# +# Copyright (c) 2014-2019 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" + +import contextlib + + +class _DEFAULT_CONTEXT(object): + """The default value for OpenGL context""" + + pass + + +_context = _DEFAULT_CONTEXT +"""The current OpenGL context""" + + +def getCurrent(): + """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 + """ + return _context + + +def setCurrent(context=_DEFAULT_CONTEXT): + """Set a platform dependent OpenGL context + + :param context: Platform dependent GL context + """ + global _context + _context = context + + +@contextlib.contextmanager +def current(context): + """Context manager setting the platform-dependent GL context + + :param context: Platform dependent GL context + """ + previous_context = getCurrent() + setCurrent(context) + yield + setCurrent(previous_context) |