WIP refactor(render): add draw passes

1 files changed, 43 insertions, 0 deletions

diff --git a/stockton-render/src/draw/draw_passes/mod.rs b/stockton-render/src/draw/draw_passes/mod.rs
new file mode 100644
index 0000000..76dd8d6
--- /dev/null
+++ b/stockton-render/src/draw/draw_passes/mod.rs
@@ -0,0 +1,43 @@
+//! Traits and common draw passes.
+
+mod cons;
+mod level;
+use std::sync::{Arc, RwLock};
+
+pub use level::LevelDrawPass;
+
+use super::{queue_negotiator::QueueNegotiator, target::SwapchainProperties};
+use crate::types::*;
+use anyhow::Result;
+
+/// Type can be used as input to a draw pass. This requires it being available from only the resources at draw time.
+pub trait DrawPassInput {}
+
+/// One of several 'passes' that draw on each frame.
+pub trait DrawPass {
+    /// Extra input required for this draw pass.
+    type Input: DrawPassInput;
+
+    /// Queue any necessary draw commands to cmd_buffer
+    /// This should assume the command buffer isn't in the middle of a renderpass, and should leave it as such.
+    fn queue_draw(&self, input: &Self::Input, cmd_buffer: &mut CommandBufferT) -> Result<()>;
+
+    /// This function should ask the queue negotatior to find families for any auxilary operations this draw pass needs to perform
+    /// For example, .find(&TexLoadQueue)
+    /// It should return then call .family_spec for each queue type negotiated and return the results.
+    fn find_aux_queues<'a>(
+        adapter: &'a Adapter,
+        queue_negotiator: &mut QueueNegotiator,
+    ) -> Result<Vec<(&'a QueueFamilyT, Vec<f32>)>>;
+}
+
+/// A type that can be made into a specific draw pass type.
+/// This allows extra data to be used in initialisation without the Renderer needing to worry about it.
+pub trait IntoDrawPass<O: DrawPass> {
+    fn init(
+        self,
+        device: Arc<RwLock<DeviceT>>,
+        queue_negotiator: &mut QueueNegotiator,
+        swapchain_properties: &SwapchainProperties,
+    ) -> Result<O>;
+}