- moved the render interface functions out of FGLRenderer into OpenGLFrameBuffer.

These need some consolidation among the backends, and the additional indirection in the OpenGL backend made it harder than necessary.

src/rendering/gl/system/gl_framebuffer.h

@@ -16,6 +16,8 @@ class OpenGLFrameBuffer : public SystemGLFrameBuffer
 {
 	typedef SystemGLFrameBuffer Super;
 
+	void RenderTextureView(FCanvasTexture* tex, AActor* Viewpoint, double FOV);
+
 public:
 
 	explicit OpenGLFrameBuffer() {}