screen-13 0.13.0

An easy-to-use Vulkan rendering engine in the spirit of QBasic.
Documentation 
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use {
    super::{Bind, Binding, RenderGraph, SwapchainImageNode},
    crate::driver::swapchain::SwapchainImage,
};

impl Bind<&mut RenderGraph, SwapchainImageNode> for SwapchainImage {
    fn bind(self, graph: &mut RenderGraph) -> SwapchainImageNode {
        // We will return a new node
        let res = SwapchainImageNode::new(graph.bindings.len());

        //trace!("Node {}: {:?}", res.idx, &self);

        let binding = Binding::SwapchainImage(Box::new(self), true);
        graph.bindings.push(binding);

        res
    }
}

impl Binding {
    pub(super) fn as_swapchain_image(&self) -> Option<&SwapchainImage> {
        if let Self::SwapchainImage(binding, true) = self {
            Some(binding)
        } else if let Self::SwapchainImage(_, false) = self {
            // User code might try this - but it is a programmer error
            // to access a binding after it has been unbound so dont
            None
        } else {
            // The private code in this module should prevent this branch
            unreachable!();
        }
    }
}