GLContextImpl shall have only _one_ unique platform derivative to allow proper swapping of GLDrawables of any type via: - 'GLAutoDrawable.setContext(GLContext newCtx, boolean destroyPrevCtx)', which calls - 'GLContext.setGLDrawable(GLDrawable readWrite, boolean setWriteOnly)' Exception: External context may be specialized. All drawable specific property handling shall be provided and implemented (if possible) via GLDrawable specializations. - GLContext.isGLOrientationFlippedVertical() -> GLDrawable.isGLOriented() - PNGImage.createFromData() takes 'isGLOriented' to properly handle vertical flipping simply by line ordering - TextureIO's PNG writer passes TextureData's getMustFlipVertically() as isGLOriented to PNGImage.createFromData() - GLReadBufferUtil respects GLDrawable's isGLOriented() when creating TextureData instance. - Screenshot respects GLDrawable's isGLOriented() - Screenshot is deprecated, use GLReadBufferUtil. - Removed all PBuffer attributes, i.e. floatingPoint, RenderToTexture and RenderToTextureRectangle. - Allows removal of special pbuffer handling in GLContext* implementations. - Removed also from GLCapabilities* - Removed from deprecated GLPbuffer Impact: - Low, users who desire to render into a texture shall use our FBO GLOffscreenDrawable. - Only use case was the deprecated GLPbuffer - floating point framebuffer technology is still patented anyways :) - Removed Java2DGLContext, which was only used for OSX's GLJPanel Java2D bridge, which is no more supported anyways.