diff options
Diffstat (limited to 'silx/gui/_glutils/Context.py')
| -rw-r--r-- | silx/gui/_glutils/Context.py | 42 |
1 files changed, 27 insertions, 15 deletions
diff --git a/silx/gui/_glutils/Context.py b/silx/gui/_glutils/Context.py index 7600992..c62dbb9 100644 --- a/silx/gui/_glutils/Context.py +++ b/silx/gui/_glutils/Context.py @@ -1,7 +1,7 @@ # coding: utf-8 # /*########################################################################## # -# Copyright (c) 2014-2017 European Synchrotron Radiation Facility +# 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 @@ -32,32 +32,44 @@ __authors__ = ["T. Vincent"] __license__ = "MIT" __date__ = "25/07/2016" +import contextlib -# context ##################################################################### +class _DEFAULT_CONTEXT(object): + """The default value for OpenGL context""" + pass -def _defaultGLContextGetter(): - return None +_context = _DEFAULT_CONTEXT +"""The current OpenGL context""" -_glContextGetter = _defaultGLContextGetter - -def getGLContext(): +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 - :rtype: None by default or a platform dependent object""" - return _glContextGetter() + """ + return _context + + +def setCurrent(context=_DEFAULT_CONTEXT): + """Set a platform dependent OpenGL context + + :param context: Platform dependent GL context + """ + global _context + _context = context -def setGLContextGetter(getter=_defaultGLContextGetter): - """Set a platform dependent function to retrieve the current OpenGL context +@contextlib.contextmanager +def current(context): + """Context manager setting the platform-dependent GL context - :param getter: Platform dependent GL context getter - :type getter: Function with no args returning the current OpenGL context + :param context: Platform dependent GL context """ - global _glContextGetter - _glContextGetter = getter + previous_context = getCurrent() + setCurrent(context) + yield + setCurrent(previous_context) |