bgfx_sys::BGFX_STATE_BLEND_FUNC_SEPARATE!

macro_rules! BGFX_STATE_BLEND_FUNC_SEPARATE {
    ($srcrgb:expr, $dstrgb:expr, $srca:expr, $dsta:expr) => (
        ($srcrgb as u64) | (($dstrgb as u64) << 4) | (($srca as u64) << 8) | (($dsta as u64) << 12)
    );
}