/// Operation to perform to the output attachment at the start of a renderpass.
pub enum LoadOp<V> {
    /// Clear with a specified value.
    Clear(V),
    /// Load from memory.
    Load,
}

/// Pair of load and store operations for an attachment aspect.
pub type Operations<V> = (LoadOp<V>, StoreOp);

/// Describes a color attachment to a [`RenderPass`].
pub struct RenderPassColorAttachmentDescriptor<'a> {
    pub attachment: &'a TextureView,
    pub resolve_target: Option<&'a TextureView>,
    pub ops: Operations<Color>,
}
/// Describes a depth/stencil attachment to a [`RenderPass`].
pub struct RenderPassDepthStencilAttachmentDescriptor<'a> {
    pub attachment: &'a TextureView,
    pub depth_ops: Option<Operations<f32>>,
    pub stencil_ops: Option<Operations<u32>>,
}