Function gl::BlitFramebuffer

pub unsafe fn BlitFramebuffer(srcX0: GLint, srcY0: GLint, srcX1: GLint, srcY1: GLint, dstX0: GLint, dstY0: GLint, dstX1: GLint, dstY1: GLint, mask: GLbitfield, filter: GLenum)

Fallbacks: BlitFramebufferEXT, BlitFramebufferNV