render: create a RenderGraphLabel trait for graph labels instead of strings

Cargo.lock

@@ -1867,6 +1867,7 @@ dependencies = [
  "instant",
  "itertools 0.11.0",
  "lyra-ecs",
+ "lyra-game-derive",
  "lyra-math",
  "lyra-reflect",
  "lyra-resource",
@@ -1887,6 +1888,15 @@ dependencies = [
  "winit",
 ]
 
+[[package]]
+name = "lyra-game-derive"
+version = "0.1.0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.51",
+]
+
 [[package]]
 name = "lyra-math"
 version = "0.1.0"

lyra-game/Cargo.toml

@@ -4,6 +4,7 @@ version = "0.0.1"
 edition = "2021"
 
 [dependencies]
+lyra-game-derive = { path = "./lyra-game-derive" }
 lyra-resource = { path = "../lyra-resource" }
 lyra-ecs = { path = "../lyra-ecs", features = [ "math" ] }
 lyra-reflect = { path = "../lyra-reflect", features = [ "math" ] }

lyra-game/lyra-game-derive/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "lyra-game-derive"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "1.0.70"
+quote = "1.0.33"
+syn = "2.0.41"

lyra-game/lyra-game-derive/src/lib.rs

@@ -0,0 +1,35 @@
+use quote::quote;
+use syn::{parse_macro_input, DeriveInput};
+
+#[proc_macro_derive(RenderGraphLabel)]
+pub fn derive_render_graph_label(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
+    let input = parse_macro_input!(input as DeriveInput);
+    let (impl_generics, ty_generics, where_clause) = input.generics.split_for_impl();
+
+    let type_ident = &input.ident;
+
+    proc_macro::TokenStream::from(quote! {
+        impl #impl_generics crate::render::graph::RenderGraphLabel for #type_ident #ty_generics #where_clause {
+            fn rc_clone(&self) -> std::rc::Rc<dyn crate::render::graph::RenderGraphLabel> {
+                std::rc::Rc::new(self.clone())
+            }
+
+            /* fn as_dyn(&self) -> &dyn crate::render::graph::RenderGraphLabel {
+                &self
+            }
+
+            fn as_partial_eq(&self) -> &dyn PartialEq<dyn crate::render::graph::RenderGraphLabel> {
+                self
+            } */
+            
+            fn as_label_hash(&self) -> u64 {
+                let tyid = ::std::any::TypeId::of::<Self>();
+
+                let mut s = ::std::hash::DefaultHasher::new();
+                ::std::hash::Hash::hash(&tyid, &mut s);
+                ::std::hash::Hash::hash(self, &mut s);
+                ::std::hash::Hasher::finish(&s)
+            }
+        }
+    })
+}

lyra-game/src/render/graph/mod.rs

@@ -1,9 +1,6 @@
 mod pass;
 use std::{
-    cell::RefCell,
-    collections::{HashMap, VecDeque},
-    rc::Rc,
-    sync::Arc,
+    cell::RefCell, collections::{HashMap, VecDeque}, fmt::Debug, hash::Hash, rc::Rc, sync::Arc
 };
 
 use itertools::Itertools;
@@ -22,6 +19,62 @@ use wgpu::ComputePass;
 
 use super::resource::{ComputePipeline, Pipeline, RenderPipeline};
 
+pub trait RenderGraphLabel: Debug + 'static {
+    fn rc_clone(&self) -> Rc<dyn RenderGraphLabel>;
+    //fn as_dyn(&self) -> &dyn RenderGraphLabel;
+    //fn as_partial_eq(&self) -> &dyn PartialEq<dyn RenderGraphLabel>;
+    fn as_label_hash(&self) -> u64;
+
+    fn label_eq_rc(&self, other: &Rc<dyn RenderGraphLabel>) -> bool {
+        self.as_label_hash() == other.as_label_hash()
+    }
+
+    fn label_eq(&self, other: &dyn RenderGraphLabel) -> bool {
+        self.as_label_hash() == other.as_label_hash()
+    }
+}
+
+#[derive(Clone)]
+pub struct RenderGraphLabelValue(Rc<dyn RenderGraphLabel>);
+
+impl Debug for RenderGraphLabelValue {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        self.0.fmt(f)
+    }
+}
+
+impl<L: RenderGraphLabel> From<L> for RenderGraphLabelValue {
+    fn from(value: L) -> Self {
+        Self(Rc::new(value))
+    }
+}
+
+impl From<Rc<dyn RenderGraphLabel>> for RenderGraphLabelValue {
+    fn from(value: Rc<dyn RenderGraphLabel>) -> Self {
+        Self(value)
+    }
+}
+
+impl From<&Rc<dyn RenderGraphLabel>> for RenderGraphLabelValue {
+    fn from(value: &Rc<dyn RenderGraphLabel>) -> Self {
+        Self(value.clone())
+    }
+}
+
+impl Hash for RenderGraphLabelValue {
+    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
+        state.write_u64(self.0.as_label_hash());
+    }
+}
+
+impl PartialEq for RenderGraphLabelValue {
+    fn eq(&self, other: &Self) -> bool {
+        self.0.label_eq_rc(&other.0)
+    }
+}
+
+impl Eq for RenderGraphLabelValue {}
+
 struct PassEntry {
     inner: Arc<RefCell<dyn RenderGraphPass>>,
     desc: Arc<RenderGraphPassDesc>,
@@ -30,7 +83,7 @@ struct PassEntry {
 }
 
 pub struct BindGroupEntry {
-    pub name: String,
+    pub label: RenderGraphLabelValue,
     /// BindGroup
     pub bg: Rc<wgpu::BindGroup>,
     /// BindGroupLayout
@@ -39,7 +92,7 @@ pub struct BindGroupEntry {
 
 #[allow(dead_code)]
 struct ResourcedSlot {
-    name: String,
+    label: RenderGraphLabelValue,
     ty: SlotType,
     value: SlotValue,
 }
@@ -64,11 +117,13 @@ pub struct RenderGraph {
     device: Rc<wgpu::Device>,
     queue: Rc<wgpu::Queue>,
     slots: FxHashMap<u64, ResourcedSlot>,
-    slot_names: HashMap<String, u64>,
+    /// HashMap used to lookup the slot id using the label's hash
+    slot_label_lookup: FxHashMap<RenderGraphLabelValue, u64>,
     passes: FxHashMap<u64, PassEntry>,
     // TODO: Use a SlotMap
     bind_groups: FxHashMap<u64, BindGroupEntry>,
-    bind_group_names: HashMap<String, u64>,
+    /// HashMap used to lookup the bind group id using the label's hash
+    bind_group_names: FxHashMap<RenderGraphLabelValue, u64>,
     // TODO: make pipelines a `type` parameter in RenderPasses,
     // then the pipelines can be retrieved via TypeId to the pass.
     pipelines: FxHashMap<u64, PipelineResource>,
@@ -83,7 +138,7 @@ impl RenderGraph {
             device,
             queue,
             slots: Default::default(),
-            slot_names: Default::default(),
+            slot_label_lookup: Default::default(),
             passes: Default::default(),
             bind_groups: Default::default(),
             bind_group_names: Default::default(),
@@ -102,8 +157,12 @@ impl RenderGraph {
         self.current_id
     }
 
-    pub fn slot_id(&self, name: &str) -> Option<u64> {
-        self.slot_names.get(name).cloned()
+    pub(crate) fn slot_id_rc(&self, label: &RenderGraphLabelValue) -> Option<u64> {
+        self.slot_label_lookup.get(&label.clone().into()).cloned()
+    }
+
+    pub fn slot_id(&self, label: &dyn RenderGraphLabel) -> Option<u64> {
+        self.slot_label_lookup.get(&label.rc_clone().into()).cloned()
     }
 
     #[instrument(skip(self, pass), level = "debug")]
@@ -113,48 +172,53 @@ impl RenderGraph {
         // collect all the slots of the pass
         for slot in &mut desc.slots {
             if let Some((id, other)) = self
-                .slot_names
-                .get(&slot.name)
+                .slot_label_lookup
+                .get(&slot.label)
                 .and_then(|id| self.slots.get_mut(id).map(|s| (id, s)))
             {
                 debug_assert_eq!(
                     slot.ty, other.ty,
-                    "slot {} in pass {} does not match existing slot of same name",
-                    slot.name, desc.name
+                    "slot {:?} in pass {:?} does not match existing slot of same name",
+                    slot.label, desc.label
                 );
 
                 trace!(
-                    "Found existing slot for {}, changing id to {}",
-                    slot.name,
+                    "Found existing slot for {:?}, changing id to {}",
+                    slot.label,
                     id
                 );
 
                 // if there is a slot of the same name
                 slot.id = *id;
             } else {
+                debug_assert!(!self.slots.contains_key(&slot.id),
+                    "Reuse of id detected in render graph! Pass: {:?}, slot: {:?}",
+                    desc.label, slot.label,
+                );
+
                 let res_slot = ResourcedSlot {
-                    name: slot.name.clone(),
+                    label: slot.label.clone(),
                     ty: slot.ty,
                     value: slot.value.clone().unwrap_or(SlotValue::None),
                 };
 
                 self.slots.insert(slot.id, res_slot);
-                self.slot_names.insert(slot.name.clone(), slot.id);
+                self.slot_label_lookup.insert(slot.label.clone(), slot.id);
             }
         }
 
         // get clones of the bind groups and layouts
-        for (name, bg, bgl) in &desc.bind_groups {
+        for (label, bg, bgl) in &desc.bind_groups {
             let bg_id = self.next_id();
             self.bind_groups.insert(
                 bg_id,
                 BindGroupEntry {
-                    name: name.clone(),
+                    label: label.clone(),
                     bg: bg.clone(),
                     layout: bgl.clone(),
                 },
             );
-            self.bind_group_names.insert(name.clone(), bg_id);
+            self.bind_group_names.insert(label.clone().into(), bg_id);
         }
 
         let index = self.execution_graph.add_node(desc.id);
@@ -219,15 +283,15 @@ impl RenderGraph {
             while let Some(bufwr) = context.buffer_writes.pop_front() {
                 let slot = self
                     .slots
-                    .get(&self.slot_id(&bufwr.target_slot).unwrap())
+                    .get(&self.slot_id_rc(&bufwr.target_slot).unwrap())
                     .expect(&format!(
-                        "Failed to find slot '{}' for buffer write",
+                        "Failed to find slot '{:?}' for buffer write",
                         bufwr.target_slot
                     ));
                 let buf = slot
                     .value
                     .as_buffer()
-                    .expect(&format!("Slot '{}' is not a buffer", bufwr.target_slot));
+                    .expect(&format!("Slot '{:?}' is not a buffer", bufwr.target_slot));
 
                 self.queue.write_buffer(buf, bufwr.offset, &bufwr.bytes);
             }
@@ -243,7 +307,7 @@ impl RenderGraph {
             .collect();
         let path_names = sorted
             .iter()
-            .map(|i| self.pass(*i).unwrap().name.clone())
+            .map(|i| self.pass(*i).unwrap().label.clone())
             .collect_vec();
         trace!("Render graph execution order: {:?}", path_names);
 
@@ -252,7 +316,7 @@ impl RenderGraph {
             let pass = self.passes.get(&pass_id).unwrap();
             let pass_inn = pass.inner.clone();
             let pass_desc = pass.desc.clone();
-            let label = format!("{} Encoder", pass_desc.name);
+            let label = format!("{:?} Encoder", pass_desc.label);
 
             // encoders are not needed for presenter nodes.
             let encoder = if pass_desc.pass_type.should_have_pipeline() {
@@ -277,7 +341,7 @@ impl RenderGraph {
                 self.queue.submit(encoders.drain(..));
             }
 
-            trace!("Executing {}", pass_desc.name);
+            trace!("Executing {:?}", pass_desc.label);
             let mut inner = pass_inn.borrow_mut();
             inner.execute(self, &*pass_desc, &mut context);
 
@@ -336,24 +400,30 @@ impl RenderGraph {
     }
 
     #[inline(always)]
-    pub fn bind_group_id(&self, name: &str) -> Option<u64> {
-        self.bind_group_names.get(name).copied()
+    pub fn bind_group_id(&self, label: &dyn RenderGraphLabel) -> Option<u64> {
+        self.bind_group_names.get(&label.rc_clone().into()).copied()
     }
 
-    pub fn add_edge(&mut self, from: &str, to: &str) {
+    pub fn add_edge(&mut self, from: impl RenderGraphLabel, to: impl RenderGraphLabel)
+    {
+        let from = RenderGraphLabelValue::from(from);
+        let to = RenderGraphLabelValue::from(to);
+
         let from_idx = self
             .passes
             .iter()
-            .find(|p| p.1.desc.name == from)
+            .find(|p| p.1.desc.label == from)
             .map(|p| p.1.graph_index)
             .expect("Failed to find from pass");
         let to_idx = self
             .passes
             .iter()
-            .find(|p| p.1.desc.name == to)
+            .find(|p| p.1.desc.label == to)
             .map(|p| p.1.graph_index)
             .expect("Failed to find to pass");
 
+        debug_assert_ne!(from_idx, to_idx, "cannot add edges between the same node");
+
         self.execution_graph.add_edge(from_idx, to_idx, ());
     }
 
@@ -384,13 +454,13 @@ impl RenderGraph {
     pub fn set_bind_groups<'a>(
         &'a self,
         pass: &mut ComputePass<'a>,
-        bind_groups: &[(&str, u32)],
+        bind_groups: &[(&dyn RenderGraphLabel, u32)],
     ) {
-        for (name, index) in bind_groups {
+        for (label, index) in bind_groups {
             let bg = self
-                .bind_group_id(name)
+                .bind_group_id(*label)
                 .map(|bgi| self.bind_group(bgi))
-                .expect(&format!("Could not find bind group '{}'", name));
+                .expect(&format!("Could not find bind group '{:?}'", label));
 
             pass.set_bind_group(*index, bg, &[]);
         }
@@ -400,7 +470,7 @@ impl RenderGraph {
 /// A queued write to a GPU buffer targeting a graph slot.
 pub(crate) struct GraphBufferWrite {
     /// The name of the slot that has the resource that will be written
-    target_slot: String,
+    target_slot: RenderGraphLabelValue,
     offset: u64,
     bytes: Vec<u8>,
 }
@@ -455,9 +525,9 @@ impl<'a> RenderGraphContext<'a> {
     /// data will be submitted to the GPU queue right after the prepare stage for all passes
     /// is ran.
     #[instrument(skip(self, bytes), level="trace", fields(size = bytes.len()))]
-    pub fn queue_buffer_write(&mut self, target_slot: &str, offset: u64, bytes: &[u8]) {
+    pub fn queue_buffer_write(&mut self, target_slot: impl RenderGraphLabel, offset: u64, bytes: &[u8]) {
         self.buffer_writes.push_back(GraphBufferWrite {
-            target_slot: target_slot.to_string(),
+            target_slot: target_slot.into(),
             offset,
             bytes: bytes.to_vec(),
         })
@@ -467,7 +537,7 @@ impl<'a> RenderGraphContext<'a> {
     #[instrument(skip(self, bytes), level="trace", fields(size = std::mem::size_of::<T>()))]
     pub fn queue_buffer_write_with<T: bytemuck::NoUninit>(
         &mut self,
-        target_slot: &str,
+        target_slot: impl RenderGraphLabel,
         offset: u64,
         bytes: T,
     ) {

lyra-game/src/render/graph/pass.rs

@@ -4,7 +4,7 @@ use lyra_ecs::World;
 
 use crate::render::resource::PipelineDescriptor;
 
-use super::{RenderGraph, RenderGraphContext, RenderTarget};
+use super::{RenderGraph, RenderGraphContext, RenderGraphLabel, RenderGraphLabelValue, RenderTarget};
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Default)]
 pub enum RenderPassType {
@@ -96,7 +96,7 @@ pub struct RenderPassSlot {
     pub ty: SlotType,
     pub attribute: SlotAttribute,
     pub id: u64,
-    pub name: String,
+    pub label: RenderGraphLabelValue,
     /// The descriptor of the slot value.
     /// This will be `None` if this slot is an input.
     pub value: Option<SlotValue>,
@@ -159,36 +159,36 @@ impl RenderGraphPipelineInfo {
 
 pub struct RenderGraphPassDesc {
     pub id: u64,
-    pub name: String,
+    pub label: RenderGraphLabelValue,
     pub pass_type: RenderPassType,
     pub slots: Vec<RenderPassSlot>,
-    slot_names: HashMap<String, u64>,
+    slot_label_lookup: HashMap<RenderGraphLabelValue, u64>,
     pub pipeline_desc: Option<PipelineDescriptor>,
     pub bind_groups: Vec<(
-        String,
+        RenderGraphLabelValue,
         Rc<wgpu::BindGroup>,
         Option<Rc<wgpu::BindGroupLayout>>,
     )>,
 }
 
 impl RenderGraphPassDesc {
-    pub fn new(
+    pub fn new<L: RenderGraphLabel>(
         id: u64,
-        name: &str,
+        label: L,
         pass_type: RenderPassType,
         pipeline_desc: Option<PipelineDescriptor>,
-        bind_groups: Vec<(&str, Rc<wgpu::BindGroup>, Option<Rc<wgpu::BindGroupLayout>>)>,
+        bind_groups: Vec<(&dyn RenderGraphLabel, Rc<wgpu::BindGroup>, Option<Rc<wgpu::BindGroupLayout>>)>,
     ) -> Self {
         Self {
             id,
-            name: name.to_string(),
+            label: label.into(),
             pass_type,
             slots: vec![],
-            slot_names: HashMap::default(),
+            slot_label_lookup: HashMap::default(),
             pipeline_desc,
             bind_groups: bind_groups
                 .into_iter()
-                .map(|bg| (bg.0.to_string(), bg.1, bg.2))
+                .map(|bg| (bg.0.rc_clone().into(), bg.1, bg.2))
                 .collect(),
         }
     }
@@ -199,15 +199,15 @@ impl RenderGraphPassDesc {
             "input slots should not have values"
         );
 
-        self.slot_names.insert(slot.name.clone(), slot.id);
+        self.slot_label_lookup.insert(slot.label.clone().into(), slot.id);
         self.slots.push(slot);
     }
 
     #[inline(always)]
-    pub fn add_buffer_slot(
+    pub fn add_buffer_slot<L: RenderGraphLabel>(
         &mut self,
         id: u64,
-        name: &str,
+        label: L,
         attribute: SlotAttribute,
         value: Option<SlotValue>,
     ) {
@@ -218,7 +218,7 @@ impl RenderGraphPassDesc {
 
         let slot = RenderPassSlot {
             id,
-            name: name.to_string(),
+            label: label.into(),
             ty: SlotType::Buffer,
             attribute,
             value,
@@ -227,10 +227,10 @@ impl RenderGraphPassDesc {
     }
 
     #[inline(always)]
-    pub fn add_texture_slot(
+    pub fn add_texture_slot<L: RenderGraphLabel>(
         &mut self,
         id: u64,
-        name: &str,
+        label: L,
         attribute: SlotAttribute,
         value: Option<SlotValue>,
     ) {
@@ -241,7 +241,7 @@ impl RenderGraphPassDesc {
 
         let slot = RenderPassSlot {
             id,
-            name: name.to_string(),
+            label: label.into(),
             ty: SlotType::Texture,
             attribute,
             value,
@@ -250,10 +250,10 @@ impl RenderGraphPassDesc {
     }
 
     #[inline(always)]
-    pub fn add_texture_view_slot(
+    pub fn add_texture_view_slot<L: RenderGraphLabel>(
         &mut self,
         id: u64,
-        name: &str,
+        label: L,
         attribute: SlotAttribute,
         value: Option<SlotValue>,
     ) {
@@ -264,7 +264,7 @@ impl RenderGraphPassDesc {
 
         let slot = RenderPassSlot {
             id,
-            name: name.to_string(),
+            label: label.into(),
             ty: SlotType::TextureView,
             attribute,
             value,
@@ -273,10 +273,10 @@ impl RenderGraphPassDesc {
     }
 
     #[inline(always)]
-    pub fn add_sampler_slot(
+    pub fn add_sampler_slot<L: RenderGraphLabel>(
         &mut self,
         id: u64,
-        name: &str,
+        label: L,
         attribute: SlotAttribute,
         value: Option<SlotValue>,
     ) {
@@ -287,7 +287,7 @@ impl RenderGraphPassDesc {
 
         let slot = RenderPassSlot {
             id,
-            name: name.to_string(),
+            label: label.into(),
             ty: SlotType::Sampler,
             attribute,
             value,

lyra-game/src/render/graph/passes/base.rs

@@ -1,6 +1,7 @@
 use std::{cell::RefCell, rc::Rc};
 
 use glam::UVec2;
+use lyra_game_derive::RenderGraphLabel;
 use tracing::warn;
 use winit::dpi::PhysicalSize;
 
@@ -16,6 +17,19 @@ use crate::{
     scene::CameraComponent,
 };
 
+#[derive(Debug, Hash, Clone, Default, PartialEq, RenderGraphLabel)]
+pub struct BasePassLabel;
+
+#[derive(Debug, Hash, Clone, PartialEq, RenderGraphLabel)]
+pub enum BasePassSlots {
+    DepthTexture,
+    ScreenSize,
+    Camera,
+    MainRenderTarget,
+    WindowTextureView,
+    DepthTextureView,
+}
+
 /// Supplies some basic things other passes needs.
 ///
 /// screen size buffer, camera buffer,
@@ -89,13 +103,13 @@ impl RenderGraphPass for BasePass {
 
         let mut desc = RenderGraphPassDesc::new(
             graph.next_id(),
-            "base",
+            BasePassLabel,
             RenderPassType::Node,
             None,
             vec![
-                ("depth_texture", depth_texture_bg, Some(depth_texture_bgl)),
-                ("screen_size", screen_size_bg, Some(screen_size_bgl)),
-                ("camera", camera_bg, Some(camera_bgl)),
+                (&BasePassSlots::DepthTexture, depth_texture_bg, Some(depth_texture_bgl)),
+                (&BasePassSlots::ScreenSize, screen_size_bg, Some(screen_size_bgl)),
+                (&BasePassSlots::Camera, camera_bg, Some(camera_bgl)),
             ],
         );
 
@@ -104,7 +118,7 @@ impl RenderGraphPass for BasePass {
             ty: SlotType::RenderTarget,
             attribute: SlotAttribute::Output,
             id: self.main_rt_id,
-            name: "main_render_target".into(),
+            label: BasePassSlots::MainRenderTarget.into(),
             value: Some(SlotValue::RenderTarget(Rc::new(RefCell::new(
                 render_target,
             )))),
@@ -112,25 +126,25 @@ impl RenderGraphPass for BasePass {
         self.window_tv_id = graph.next_id();
         desc.add_texture_view_slot(
             self.window_tv_id,
-            "window_texture_view",
+            BasePassSlots::WindowTextureView,
             SlotAttribute::Output,
             Some(SlotValue::Lazy),
         );
         desc.add_texture_view_slot(
             graph.next_id(),
-            "depth_texture_view",
+            BasePassSlots::DepthTextureView,
             SlotAttribute::Output,
             Some(SlotValue::TextureView(depth_texture_view)),
         );
         desc.add_buffer_slot(
             graph.next_id(),
-            "screen_size_buffer",
+            BasePassSlots::ScreenSize,
             SlotAttribute::Output,
             Some(SlotValue::Buffer(Rc::new(screen_size_buf))),
         );
         desc.add_buffer_slot(
             graph.next_id(),
-            "camera_buffer",
+            BasePassSlots::Camera,
             SlotAttribute::Output,
             Some(SlotValue::Buffer(Rc::new(camera_buf))),
         );
@@ -144,7 +158,7 @@ impl RenderGraphPass for BasePass {
                 RenderCamera::new(PhysicalSize::new(self.screen_size.x, self.screen_size.y));
             let uniform = render_cam.calc_view_projection(&camera);
 
-            context.queue_buffer_write_with("camera_buffer", 0, uniform)
+            context.queue_buffer_write_with(BasePassSlots::Camera, 0, uniform)
         } else {
             warn!("Missing camera!");
         }
@@ -170,7 +184,7 @@ impl RenderGraphPass for BasePass {
             || rt.surface_config.height != self.screen_size.y
         {
             self.screen_size = UVec2::new(rt.surface_config.width, rt.surface_config.height);
-            context.queue_buffer_write_with("screen_size_buffer", 0, self.screen_size)
+            context.queue_buffer_write_with(BasePassSlots::ScreenSize, 0, self.screen_size)
         }
 
         let surface_tex = rt.surface.get_current_texture().unwrap();

lyra-game/src/render/graph/passes/light_base.rs

@@ -1,3 +1,5 @@
+use lyra_game_derive::RenderGraphLabel;
+
 use crate::render::{
     graph::{
         RenderGraphContext, RenderGraphPass, RenderGraphPassDesc, RenderPassType, SlotAttribute,
@@ -6,6 +8,14 @@ use crate::render::{
     light::LightUniformBuffers,
 };
 
+#[derive(Debug, Hash, Clone, Default, PartialEq, RenderGraphLabel)]
+pub struct LightBasePassLabel;
+
+#[derive(Debug, Hash, Clone, PartialEq, RenderGraphLabel)]
+pub enum LightBasePassSlots {
+    Lights
+}
+
 /// Supplies some basic things other passes needs.
 ///
 /// screen size buffer, camera buffer,
@@ -31,11 +41,11 @@ impl RenderGraphPass for LightBasePass {
 
         let mut desc = RenderGraphPassDesc::new(
             graph.next_id(),
-            "light_base",
+            LightBasePassLabel,
             RenderPassType::Node,
             None,
             vec![(
-                "light_buffers",
+                &LightBasePassSlots::Lights,
                 light_buffers.bind_group.clone(),
                 Some(light_buffers.bind_group_layout.clone()),
             )],
@@ -43,7 +53,7 @@ impl RenderGraphPass for LightBasePass {
 
         desc.add_buffer_slot(
             graph.next_id(),
-            "light_buffers",
+            LightBasePassSlots::Lights,
             SlotAttribute::Output,
             Some(SlotValue::Buffer(light_buffers.buffer.clone())),
         );

lyra-game/src/render/graph/passes/light_cull_compute.rs

@@ -1,6 +1,7 @@
 use std::{mem, rc::Rc};
 
 use lyra_ecs::World;
+use lyra_game_derive::RenderGraphLabel;
 use wgpu::util::DeviceExt;
 
 use crate::render::{
@@ -11,6 +12,19 @@ use crate::render::{
     resource::{ComputePipelineDescriptor, PipelineDescriptor, Shader},
 };
 
+use super::{BasePassSlots, LightBasePassSlots};
+
+#[derive(Debug, Hash, Clone, Default, PartialEq, RenderGraphLabel)]
+pub struct LightCullComputePassLabel;
+
+#[derive(Debug, Hash, Clone, PartialEq, RenderGraphLabel)]
+pub enum LightCullComputePassSlots {
+    LightGridTexture,
+    LightGridTextureView,
+    IndexCounterBuffer,
+    LightIndicesGridGroup,
+}
+
 pub struct LightCullComputePass {
     workgroup_size: glam::UVec2,
 }
@@ -35,7 +49,7 @@ impl RenderGraphPass for LightCullComputePass {
 
         // get the size of the work group for the grid
         let main_rt = graph
-            .slot_id("main_render_target")
+            .slot_id(&BasePassSlots::MainRenderTarget)
             .and_then(|s| graph.slot_value(s))
             .and_then(|s| s.as_render_target())
             .expect("missing main render target");
@@ -157,14 +171,14 @@ impl RenderGraphPass for LightCullComputePass {
         drop(main_rt);
         let pass_id = graph.next_id();
 
-        let depth_tex_bgl = graph.bind_group_layout(graph.bind_group_id("depth_texture").unwrap());
-        let camera_bgl = graph.bind_group_layout(graph.bind_group_id("camera").unwrap());
-        let lights_bgl = graph.bind_group_layout(graph.bind_group_id("light_buffers").unwrap());
-        let screen_size_bgl = graph.bind_group_layout(graph.bind_group_id("screen_size").unwrap());
+        let depth_tex_bgl = graph.bind_group_layout(graph.bind_group_id(&BasePassSlots::DepthTexture).unwrap());
+        let camera_bgl = graph.bind_group_layout(graph.bind_group_id(&BasePassSlots::Camera).unwrap());
+        let lights_bgl = graph.bind_group_layout(graph.bind_group_id(&LightBasePassSlots::Lights).unwrap());
+        let screen_size_bgl = graph.bind_group_layout(graph.bind_group_id(&BasePassSlots::ScreenSize).unwrap());
 
         let mut desc = RenderGraphPassDesc::new(
             pass_id,
-            "light_cull_compute",
+            LightCullComputePassLabel,
             RenderPassType::Compute,
             Some(PipelineDescriptor::Compute(ComputePipelineDescriptor {
                 label: Some("light_cull_pipeline".into()),
@@ -180,7 +194,7 @@ impl RenderGraphPass for LightCullComputePass {
                 shader_entry_point: "cs_main".into(),
             })),
             vec![(
-                "light_indices_grid",
+                &LightCullComputePassSlots::LightIndicesGridGroup,
                 light_indices_bg,
                 Some(light_indices_bg_layout),
             )],
@@ -188,20 +202,20 @@ impl RenderGraphPass for LightCullComputePass {
 
         desc.add_texture_view_slot(
             graph.next_id(),
-            "window_texture_view",
+            BasePassSlots::WindowTextureView,
             SlotAttribute::Input,
             None,
         );
         desc.add_buffer_slot(
             graph.next_id(),
-            "screen_size_buffer",
+            BasePassSlots::ScreenSize,
             SlotAttribute::Input,
             None,
         );
-        desc.add_buffer_slot(graph.next_id(), "camera_buffer", SlotAttribute::Input, None);
+        desc.add_buffer_slot(graph.next_id(), BasePassSlots::Camera, SlotAttribute::Input, None);
         desc.add_buffer_slot(
             graph.next_id(),
-            "index_counter_buffer",
+            LightCullComputePassSlots::IndexCounterBuffer,
             SlotAttribute::Output,
             Some(SlotValue::Buffer(Rc::new(light_index_counter_buffer))),
         );
@@ -239,11 +253,11 @@ impl RenderGraphPass for LightCullComputePass {
         graph.set_bind_groups(
             &mut pass,
             &[
-                ("depth_texture", 0),
-                ("camera", 1),
-                ("light_buffers", 2),
-                ("light_indices_grid", 3),
-                ("screen_size", 4),
+                (&BasePassSlots::DepthTexture, 0),
+                (&BasePassSlots::Camera, 1),
+                (&LightBasePassSlots::Lights, 2),
+                (&LightCullComputePassSlots::LightIndicesGridGroup, 3),
+                (&BasePassSlots::ScreenSize, 4),
             ],
         );
 

lyra-game/src/render/graph/passes/meshes.rs

@@ -3,6 +3,7 @@ use std::{collections::{HashSet, VecDeque}, rc::Rc};
 use glam::Vec3;
 use itertools::izip;
 use lyra_ecs::{query::{filter::{Has, Not, Or}, Entities, Res, TickOf}, relation::{ChildOf, RelationOriginComponent}, Component, Entity};
+use lyra_game_derive::RenderGraphLabel;
 use lyra_math::Transform;
 use lyra_resource::{gltf::Mesh, ResHandle};
 use lyra_scene::{SceneGraph, WorldTransform};
@@ -21,20 +22,26 @@ use crate::{
     DeltaTime,
 };
 
+use super::{BasePassSlots, LightBasePassSlots, LightCullComputePassSlots};
+
 type MeshHandle = ResHandle<Mesh>;
 type SceneHandle = ResHandle<SceneGraph>;
 
+#[derive(Debug, Hash, Clone, Default, PartialEq, RenderGraphLabel)]
+pub struct MeshesPassLabel;
+
+#[derive(Debug, Hash, Clone, PartialEq, RenderGraphLabel)]
+pub enum MeshesPassSlots {
+    Material
+}
+
 struct MeshBufferStorage {
     buffer_vertex: BufferStorage,
     buffer_indices: Option<(wgpu::IndexFormat, BufferStorage)>,
 
-    //#[allow(dead_code)]
-    //render_texture: Option<RenderTexture>,
+    // maybe this should just be a Uuid and the material can be retrieved though
+    // MeshPass's `material_buffers` field?
     material: Option<Rc<Material>>,
-
-    // The index of the transform for this entity.
-    // The tuple is structured like this: (transform index, index of transform inside the buffer)
-    //transform_index: TransformBufferIndices,
 }
 
 #[derive(Clone, Debug, Component)]
@@ -180,16 +187,8 @@ impl MeshPass {
     }
 
     /// Processes the mesh for the renderer, storing and creating buffers as needed. Returns true if a new mesh was processed.
-    #[instrument(skip(self, device, queue, transform, mesh, entity))]
-    fn process_mesh(&mut self, device: &wgpu::Device, queue: &wgpu::Queue, entity: Entity, transform: Transform, mesh: &Mesh, mesh_uuid: Uuid) -> bool {
-        let _ = transform;
-        /* if self.transform_buffers.should_expand() {
-            self.transform_buffers.expand_buffers(&self.device);
-        }
-
-        self.transform_buffers.update_or_insert(&self.queue, &self.render_limits,
-            entity, || ( transform.calculate_mat4(), glam::Mat3::from_quat(transform.rotation) )); */
-
+    #[instrument(skip(self, device, queue, mesh, entity))]
+    fn process_mesh(&mut self, device: &wgpu::Device, queue: &wgpu::Queue, entity: Entity, mesh: &Mesh, mesh_uuid: Uuid) -> bool {
         #[allow(clippy::map_entry)]
         if !self.mesh_buffers.contains_key(&mesh_uuid) {
             // create the mesh's buffers
@@ -233,7 +232,7 @@ impl RenderGraphPass for MeshPass {
         self.default_texture = Some(RenderTexture::from_bytes(&device, &graph.queue, texture_bind_group_layout.clone(), bytes, "default_texture").unwrap());
 
         // get surface config format
-        let main_rt = graph.slot_id("main_render_target")
+        let main_rt = graph.slot_id(&BasePassSlots::MainRenderTarget)
             .and_then(|s| graph.slot_value(s))
             .and_then(|s| s.as_render_target())
             .expect("missing main render target");
@@ -243,10 +242,10 @@ impl RenderGraphPass for MeshPass {
         // get the id here to make borrow checker happy
         let pass_id = graph.next_id();
 
-        let camera_bgl = graph.bind_group_layout(graph.bind_group_id("camera").unwrap());
-        let lights_bgl = graph.bind_group_layout(graph.bind_group_id("light_buffers").unwrap());
+        let camera_bgl = graph.bind_group_layout(graph.bind_group_id(&BasePassSlots::Camera).unwrap());
+        let lights_bgl = graph.bind_group_layout(graph.bind_group_id(&LightBasePassSlots::Lights).unwrap());
         let light_grid_bgl = graph
-            .bind_group_layout(graph.bind_group_id("light_indices_grid")
+            .bind_group_layout(graph.bind_group_id(&LightCullComputePassSlots::LightIndicesGridGroup)
                 .expect("Missing light grid bind group"));
 
         let shader = Rc::new(Shader {
@@ -256,7 +255,7 @@ impl RenderGraphPass for MeshPass {
 
         let desc = RenderGraphPassDesc::new(
             pass_id,
-            "meshes",
+            MeshesPassLabel,
             RenderPassType::Render,
             Some(PipelineDescriptor::Render(RenderPipelineDescriptor {
                 label: Some("meshes".into()),
@@ -298,7 +297,7 @@ impl RenderGraphPass for MeshPass {
                 multiview: None,
             })),
             vec![
-                ("material", material_bg, Some(material_bgl)),
+                (&MeshesPassSlots::Material, material_bg, Some(material_bgl)),
             ],
         );
 
@@ -343,6 +342,9 @@ impl RenderGraphPass for MeshPass {
         {
             alive_entities.insert(entity);
 
+            // Interpolate the transform for this entity using a component.
+            // If the entity does not have the component then it will be queued to be added
+            // to it after all the entities are prepared for rendering.
             let interp_transform = match interp_tran {
                 Some(mut interp_transform) => {
                     // found in https://youtu.be/YJB1QnEmlTs?t=472
@@ -362,22 +364,28 @@ impl RenderGraphPass for MeshPass {
                 }
             };
 
+            {
+                // expand the transform buffers if they need to be.
+                // this is done in its own scope to avoid multiple mutable references to self at
+                // once; aka, make the borrow checker happy
+                let transforms = self.transforms.as_mut().unwrap();
+                if transforms.needs_expand() {
+                    debug!("Expanding transform buffers");
+                    transforms.expand_buffers(device);
+                }
+            }
+
             if let Some((mesh_han, mesh_epoch)) = mesh_pair {
                 if let Some(mesh) = mesh_han.data_ref() {
                     // if process mesh did not just create a new mesh, and the epoch
                     // shows that the scene has changed, verify that the mesh buffers
                     // dont need to be resent to the gpu.
-                    if !self.process_mesh(device, queue, entity, interp_transform, &*mesh, mesh_han.uuid())
+                    if !self.process_mesh(device, queue, entity, &*mesh, mesh_han.uuid())
                             && mesh_epoch == last_epoch {
                         self.check_mesh_buffers(device, queue, &mesh_han);
                     }
-
-                    let transforms = self.transforms.as_mut().unwrap();
-                    if transforms.needs_expand() {
-                        debug!("Expanding transform buffers");
-                        transforms.expand_buffers(device);
-                    }
                     
+                    let transforms = self.transforms.as_mut().unwrap();
                     let group = TransformGroup::EntityRes(entity, mesh_han.uuid());
                     let transform_id = transforms.update_or_push(device, queue, &render_limits,
                         group, interp_transform.calculate_mat4(), glam::Mat3::from_quat(interp_transform.rotation));
@@ -404,17 +412,12 @@ impl RenderGraphPass for MeshPass {
                             // if process mesh did not just create a new mesh, and the epoch
                             // shows that the scene has changed, verify that the mesh buffers
                             // dont need to be resent to the gpu.
-                            if !self.process_mesh(device, queue, entity, mesh_interpo, &*mesh, mesh_han.uuid())
+                            if !self.process_mesh(device, queue, entity, &*mesh, mesh_han.uuid())
                                     && scene_epoch == last_epoch {
                                 self.check_mesh_buffers(device, queue, &mesh_han);
                             }
 
                             let transforms = self.transforms.as_mut().unwrap();
-                            if transforms.needs_expand() {
-                                debug!("Expanding transform buffers");
-                                transforms.expand_buffers(device);
-                            }
-
                             let scene_mesh_group = TransformGroup::Res(scene_han.uuid(), mesh_han.uuid());
                             let group = TransformGroup::OwnedGroup(entity, scene_mesh_group.into());
                             let transform_id = transforms.update_or_push(device, queue, &render_limits,
@@ -448,29 +451,29 @@ impl RenderGraphPass for MeshPass {
         let encoder = context.encoder.as_mut().unwrap();
 
         let view = graph
-            .slot_value(graph.slot_id("window_texture_view").unwrap())
+            .slot_value(graph.slot_id(&BasePassSlots::WindowTextureView).unwrap())
             .unwrap()
             .as_texture_view();
 
         let depth_view = graph
-            .slot_value(graph.slot_id("depth_texture_view").unwrap())
+            .slot_value(graph.slot_id(&BasePassSlots::DepthTextureView).unwrap())
             .unwrap()
             .as_texture_view();
 
         let camera_bg = graph
-            .bind_group(graph.bind_group_id("camera")
+            .bind_group(graph.bind_group_id(&BasePassSlots::Camera)
                 .expect("Missing camera bind group"));
         
         let lights_bg = graph
-            .bind_group(graph.bind_group_id("light_buffers")
+            .bind_group(graph.bind_group_id(&LightBasePassSlots::Lights)
                 .expect("Missing lights bind group"));
 
         let light_grid_bg = graph
-            .bind_group(graph.bind_group_id("light_indices_grid")
+            .bind_group(graph.bind_group_id(&LightCullComputePassSlots::LightIndicesGridGroup)
                 .expect("Missing light grid bind group"));
 
         let material_bg = graph
-            .bind_group(graph.bind_group_id("material")
+            .bind_group(graph.bind_group_id(&MeshesPassSlots::Material)
                 .expect("Missing material bind group"));
 
         let mut pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {

lyra-game/src/render/graph/passes/mod.rs

@@ -1,12 +1,6 @@
 mod light_cull_compute;
 pub use light_cull_compute::*;
 
-/*mod depth_prepass;
-pub use depth_prepass::*; */
-
-/* mod simple_phong;
-pub use simple_phong::*; */
-
 mod base;
 pub use base::*;
 
@@ -17,7 +11,4 @@ mod light_base;
 pub use light_base::*;
 
 mod present_pass;
-pub use present_pass::*;
-
-mod triangle;
-pub use triangle::*;
+pub use present_pass::*;

lyra-game/src/render/graph/passes/present_pass.rs

@@ -1,16 +1,32 @@
-use crate::render::graph::{RenderGraphContext, RenderGraphPass, RenderGraphPassDesc, RenderPassSlot, RenderPassType, SlotAttribute, SlotType};
+use std::hash::Hash;
+
+use lyra_game_derive::RenderGraphLabel;
+
+use crate::render::graph::{RenderGraphContext, RenderGraphLabel, RenderGraphLabelValue, RenderGraphPass, RenderGraphPassDesc, RenderPassSlot, RenderPassType, SlotAttribute, SlotType};
+
+#[derive(Debug, Clone, Hash, PartialEq, RenderGraphLabel)]
+pub struct PresentPassLabel(RenderGraphLabelValue);
+
+impl PresentPassLabel {
+    pub fn new(label: impl RenderGraphLabel) -> Self {
+        Self(label.into())
+    }
+}
 
 /// Supplies some basic things other passes needs.
 /// 
 /// screen size buffer, camera buffer,
 pub struct PresentPass {
-    render_target_slot: String,
+    /// Label of this pass
+    label: PresentPassLabel,
+    //render_target_slot: Rc<dyn RenderGraphLabel>,
 }
 
 impl PresentPass {
-    pub fn new(render_target_slot: &str) -> Self {
+    pub fn new(render_target_slot: impl RenderGraphLabel) -> Self {
         Self {
-            render_target_slot: render_target_slot.into(),
+            //render_target_slot: render_target_slot.rc_clone(),
+            label: PresentPassLabel::new(render_target_slot),
         }
     }
 }
@@ -19,7 +35,7 @@ impl RenderGraphPass for PresentPass {
     fn desc(&mut self, graph: &mut crate::render::graph::RenderGraph) -> crate::render::graph::RenderGraphPassDesc {
         let mut desc = RenderGraphPassDesc::new(
             graph.next_id(),
-            &format!("present_{}", self.render_target_slot),
+            self.label.clone(),
             RenderPassType::Presenter,
             None,
             vec![],
@@ -30,7 +46,7 @@ impl RenderGraphPass for PresentPass {
                 ty: SlotType::RenderTarget,
                 attribute: SlotAttribute::Input,
                 id: graph.next_id(),
-                name: self.render_target_slot.clone(),
+                label: self.label.0.clone(),
                 value: None,
             }
         );
@@ -43,8 +59,8 @@ impl RenderGraphPass for PresentPass {
     }
 
     fn execute(&mut self, graph: &mut crate::render::graph::RenderGraph, _desc: &crate::render::graph::RenderGraphPassDesc, _context: &mut crate::render::graph::RenderGraphContext) {
-        let id = graph.slot_id(&self.render_target_slot)
-            .expect(&format!("render target slot '{}' for PresentPass is missing", self.render_target_slot));
+        let id = graph.slot_id_rc(&self.label.0)
+            .expect(&format!("render target slot '{:?}' for PresentPass is missing", self.label.0));
         let mut slot = graph.slot_value_mut(id).unwrap().as_render_target_mut().unwrap();
         let surf_tex = slot.current_texture.take().unwrap();
         surf_tex.present();

lyra-game/src/render/graph/passes/triangle.rs

@@ -1,153 +0,0 @@
-use std::rc::Rc;
-
-use crate::{
-    render::{
-        graph::{
-            RenderGraphContext, RenderGraphPass, RenderGraphPassDesc, RenderPassType,
-            SlotAttribute, SlotValue,
-        },
-        render_buffer::BufferWrapper,
-        resource::{FragmentState, PipelineDescriptor, RenderPipelineDescriptor, Shader, VertexState},
-    },
-    DeltaTime,
-};
-
-/// A demo pass that renders a triangle that changes colors every frame.
-#[derive(Default)]
-pub struct TrianglePass {
-    acc: f32,
-}
-
-impl TrianglePass {
-    pub fn new() -> Self {
-        Self::default()
-    }
-}
-
-impl RenderGraphPass for TrianglePass {
-    fn desc(
-        &mut self,
-        graph: &mut crate::render::graph::RenderGraph,
-    ) -> crate::render::graph::RenderGraphPassDesc {
-        let shader = Rc::new(Shader {
-            label: Some("triangle_shader".into()),
-            source: include_str!("../../shaders/triangle.wgsl").to_string(),
-        });
-
-        let device = graph.device();
-        let (color_bgl, color_bg, color_buf, _) = BufferWrapper::builder()
-            .label_prefix("color")
-            .visibility(wgpu::ShaderStages::FRAGMENT)
-            .buffer_usage(wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST)
-            .contents(&[glam::Vec4::new(0.902, 0.639, 0.451, 1.0)])
-            .finish_parts(device);
-        let color_bgl = Rc::new(color_bgl);
-        let color_bg = Rc::new(color_bg);
-
-        let main_rt = graph.slot_id("main_render_target")
-            .and_then(|s| graph.slot_value(s))
-            .and_then(|s| s.as_render_target())
-            .expect("missing main render target");
-        let surface_config_format = main_rt.surface_config.format;
-        drop(main_rt);
-
-        let mut desc = RenderGraphPassDesc::new(
-            graph.next_id(),
-            "triangle",
-            RenderPassType::Render,
-            Some(PipelineDescriptor::Render(RenderPipelineDescriptor {
-                label: Some("triangle_pipeline".into()),
-                layouts: vec![color_bgl.clone()],
-                push_constant_ranges: vec![],
-                vertex: VertexState {
-                    module: shader.clone(),
-                    entry_point: "vs_main".into(),
-                    buffers: vec![],
-                },
-                fragment: Some(FragmentState {
-                    module: shader,
-                    entry_point: "fs_main".into(),
-                    targets: vec![Some(wgpu::ColorTargetState {
-                        format: surface_config_format,
-                        blend: Some(wgpu::BlendState::REPLACE),
-                        write_mask: wgpu::ColorWrites::ALL,
-                    })],
-                }),
-                depth_stencil: None,
-                primitive: wgpu::PrimitiveState::default(),
-                multisample: wgpu::MultisampleState::default(),
-                multiview: None,
-            })),
-            vec![("color_bg", color_bg, Some(color_bgl))],
-        );
-
-        desc.add_texture_view_slot(
-            graph.next_id(),
-            "window_texture_view",
-            SlotAttribute::Input,
-            None,
-        );
-
-        desc.add_buffer_slot(
-            graph.next_id(),
-            "color_buffer",
-            SlotAttribute::Output,
-            Some(SlotValue::Buffer(Rc::new(color_buf))),
-        );
-
-        desc
-    }
-
-    fn prepare(&mut self, world: &mut lyra_ecs::World, context: &mut RenderGraphContext) {
-        const SPEED: f32 = 1.5;
-
-        let dt = **world.get_resource::<DeltaTime>();
-        self.acc += dt;
-        let x = (self.acc * SPEED).sin();
-        let y = ((self.acc + 2.15) * SPEED).sin();
-        let z = ((self.acc + 5.35) * SPEED).sin();
-
-        let color = glam::Vec4::new(x, y, z, 1.0);
-        context.queue_buffer_write_with("color_buffer", 0, color);
-    }
-
-    fn execute(
-        &mut self,
-        graph: &mut crate::render::graph::RenderGraph,
-        desc: &crate::render::graph::RenderGraphPassDesc,
-        context: &mut crate::render::graph::RenderGraphContext,
-    ) {
-        let view = graph
-            .slot_value(graph.slot_id("window_texture_view").unwrap())
-            .unwrap()
-            .as_texture_view();
-        let color_bg = graph.bind_group(graph.bind_group_id("color_bg").unwrap());
-        
-        let encoder = context.encoder.as_mut().unwrap();
-        let mut pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
-            label: Some("triangle_pass"),
-            color_attachments: &[
-                // This is what @location(0) in the fragment shader targets
-                Some(wgpu::RenderPassColorAttachment {
-                    view: &view,
-                    resolve_target: None,
-                    ops: wgpu::Operations {
-                        load: wgpu::LoadOp::Clear(wgpu::Color {
-                            r: 0.1,
-                            g: 0.2,
-                            b: 0.3,
-                            a: 1.0,
-                        }),
-                        store: true,
-                    },
-                }),
-            ],
-            depth_stencil_attachment: None,
-        });
-
-        let pipeline = graph.pipeline(desc.id);
-        pass.set_pipeline(&pipeline.as_render());
-        pass.set_bind_group(0, color_bg, &[]);
-        pass.draw(0..3, 0..1);
-    }
-}

lyra-game/src/render/renderer.rs

@@ -7,7 +7,7 @@ use lyra_ecs::World;
 use tracing::{debug, instrument, warn};
 use winit::window::Window;
 
-use crate::render::graph::{BasePass, LightBasePass, LightCullComputePass, MeshPass, PresentPass};
+use crate::render::graph::{BasePass, BasePassLabel, BasePassSlots, LightBasePass, LightBasePassLabel, LightCullComputePass, LightCullComputePassLabel, MeshPass, MeshesPassLabel, PresentPass, PresentPassLabel};
 
 use super::graph::RenderGraph;
 use super::{resource::RenderPipeline, render_job::RenderJob};
@@ -137,16 +137,16 @@ impl BasicRenderer {
         g.add_pass(MeshPass::new());
 
         debug!("Adding present pass");
-        g.add_pass(PresentPass::new("main_render_target"));
+        g.add_pass(PresentPass::new(BasePassSlots::MainRenderTarget));
 
-        g.add_edge("base", "light_base");
-        g.add_edge("light_base", "light_cull_compute");
-        g.add_edge("base", "meshes");
+        g.add_edge(BasePassLabel, LightBasePassLabel);
+        g.add_edge(LightBasePassLabel, LightCullComputePassLabel);
+        g.add_edge(BasePassLabel, MeshesPassLabel);
 
         // make sure that present runs last
-        g.add_edge("base", "present_main_render_target");
-        g.add_edge("light_cull_compute", "present_main_render_target");
-        g.add_edge("meshes", "present_main_render_target");
+        g.add_edge(BasePassLabel, PresentPassLabel::new(BasePassSlots::MainRenderTarget));
+        g.add_edge(LightCullComputePassLabel, PresentPassLabel::new(BasePassSlots::MainRenderTarget));
+        g.add_edge(MeshesPassLabel, PresentPassLabel::new(BasePassSlots::MainRenderTarget));
 
         g.setup(&device);
 
@@ -188,7 +188,7 @@ impl Renderer for BasicRenderer {
             self.size = new_size;
             
             // update surface config and the surface
-            let mut rt = self.graph.slot_value_mut(self.graph.slot_id("main_render_target").unwrap())
+            let mut rt = self.graph.slot_value_mut(self.graph.slot_id(&BasePassSlots::MainRenderTarget).unwrap())
                 .unwrap().as_render_target_mut().unwrap();
             rt.surface_config.width = new_size.width;
             rt.surface_config.height = new_size.height;