1 // osg::Operation to initialize the OpenVG context used for path rendering
3 // Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
5 // This library is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU Library General Public
7 // License as published by the Free Software Foundation; either
8 // version 2 of the License, or (at your option) any later version.
10 // This library is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // Library General Public License for more details.
15 // You should have received a copy of the GNU Library General Public
16 // License along with this library; if not, write to the Free Software
17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 #ifndef CANVAS_VG_INITOPERATION_HXX_
20 #define CANVAS_VG_INITOPERATION_HXX_
22 #include <vg/openvg.h>
23 #include <osg/GraphicsThread>
31 * Deferred graphics operation to setup OpenVG which needs a valid OpenGL
32 * context. Pass to osg::GraphicsContext::add and ensure it's executed before
33 * doing any path rendering
35 class VGInitOperation:
36 public osg::GraphicsOperation
41 GraphicsOperation("canvas::VGInit", false)
44 virtual void operator()(osg::GraphicsContext* context)
47 glGetIntegerv(GL_VIEWPORT, vp);
49 // ATTENTION: If using another OpenVG implementation ensure it doesn't
50 // change any OpenGL state!
51 vgCreateContextSH(vp[2], vp[3]);
57 } // namespace simgear
59 #endif /* CANVAS_VG_INITOPERATION_HXX_ */