Now that we have GLFW 3.3, we can use the TransparentFramebuffer window hint. This allows us to render windows which display transparent content so we can see other applications "through" it.
GLFW_TRANSPARENT_FRAMEBUFFER specifies whether the window framebuffer will be transparent. If enabled and supported by the system, the window framebuffer alpha channel will be used to combine the framebuffer with the background. This does not affect window decorations.
Now that we have GLFW 3.3, we can use the
TransparentFramebufferwindow hint. This allows us to render windows which display transparent content so we can see other applications "through" it.https://www.glfw.org/docs/3.3/window_guide.html#window_hints_wnd