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Burlen Loring authored
This patch refactors device dependent OpenGL state management code used only by the vtkHardwareSelector out of vtkOpenGLPainterDeviceAdaptor and into the new vtkOpenGLHardwareSelector class and decorates the old vtkOpenGLPainterDeviceAdaptor API with VTK_LEGACY. In vtkOpenGLHardwareSelector added a check for and load of the GL_ARB_multisample extension before using it. This fixes failing tests in ParaView with MS GDI OpenGL 1.1 driver which doesn't support multisampling. Change-Id: I450802a58d346be801fe0bc74841619cccb17075
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