From e791f5dacb63539fcd57a8b072fe13306a8ce2c9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois?= <mockersf@gmail.com>
Date: Thu, 25 Aug 2022 17:07:47 +0200
Subject: [PATCH 1/3] log shaders and defs being processed

---
 .../bevy_render/src/render_resource/pipeline_cache.rs  | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/crates/bevy_render/src/render_resource/pipeline_cache.rs b/crates/bevy_render/src/render_resource/pipeline_cache.rs
index 0467928a33e31..2e5af79e0d336 100644
--- a/crates/bevy_render/src/render_resource/pipeline_cache.rs
+++ b/crates/bevy_render/src/render_resource/pipeline_cache.rs
@@ -12,7 +12,11 @@ use crate::{
 use bevy_asset::{AssetEvent, Assets, Handle};
 use bevy_ecs::system::{Res, ResMut};
 use bevy_ecs::{event::EventReader, system::Resource};
-use bevy_utils::{default, tracing::error, Entry, HashMap, HashSet};
+use bevy_utils::{
+    default,
+    tracing::{debug, error},
+    Entry, HashMap, HashSet,
+};
 use std::{hash::Hash, iter::FusedIterator, mem, ops::Deref, sync::Arc};
 use thiserror::Error;
 use wgpu::{
@@ -137,6 +141,10 @@ impl ShaderCache {
                     shader_defs.push(String::from("NO_STORAGE_BUFFERS_SUPPORT"));
                 }
 
+                debug!(
+                    "processing shader {:?}, with shader defs {:?}",
+                    handle, shader_defs
+                );
                 let processed = self.processor.process(
                     shader,
                     &shader_defs,

From 870ae18694235f1b1a244481f64f0ce751ae535b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois?= <mockersf@gmail.com>
Date: Thu, 25 Aug 2022 17:07:59 +0200
Subject: [PATCH 2/3] make the count of pipelines ready available

---
 crates/bevy_render/src/render_resource/pipeline_cache.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/crates/bevy_render/src/render_resource/pipeline_cache.rs b/crates/bevy_render/src/render_resource/pipeline_cache.rs
index 2e5af79e0d336..8576e3b991881 100644
--- a/crates/bevy_render/src/render_resource/pipeline_cache.rs
+++ b/crates/bevy_render/src/render_resource/pipeline_cache.rs
@@ -281,6 +281,13 @@ pub struct PipelineCache {
 }
 
 impl PipelineCache {
+    pub fn count_ready(&self) -> usize {
+        self.pipelines
+            .iter()
+            .filter(|pipeline| matches!(pipeline.state, CachedPipelineState::Ok(_)))
+            .count()
+    }
+
     pub fn new(device: RenderDevice) -> Self {
         Self {
             device,

From 37931f3faa800322e0d3d0302a46d133637d99d0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois?= <mockersf@gmail.com>
Date: Tue, 30 Aug 2022 22:40:12 +0200
Subject: [PATCH 3/3] expose a readonly iterator over the cached pipelines

---
 .../src/render_resource/pipeline_cache.rs         | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/crates/bevy_render/src/render_resource/pipeline_cache.rs b/crates/bevy_render/src/render_resource/pipeline_cache.rs
index 8576e3b991881..5582e8ba45b3b 100644
--- a/crates/bevy_render/src/render_resource/pipeline_cache.rs
+++ b/crates/bevy_render/src/render_resource/pipeline_cache.rs
@@ -24,7 +24,7 @@ use wgpu::{
     VertexBufferLayout as RawVertexBufferLayout,
 };
 
-enum PipelineDescriptor {
+pub enum PipelineDescriptor {
     RenderPipelineDescriptor(Box<RenderPipelineDescriptor>),
     ComputePipelineDescriptor(Box<ComputePipelineDescriptor>),
 }
@@ -51,9 +51,9 @@ impl CachedComputePipelineId {
     pub const INVALID: Self = CachedComputePipelineId(usize::MAX);
 }
 
-struct CachedPipeline {
-    descriptor: PipelineDescriptor,
-    state: CachedPipelineState,
+pub struct CachedPipeline {
+    pub descriptor: PipelineDescriptor,
+    pub state: CachedPipelineState,
 }
 
 #[derive(Debug)]
@@ -281,11 +281,8 @@ pub struct PipelineCache {
 }
 
 impl PipelineCache {
-    pub fn count_ready(&self) -> usize {
-        self.pipelines
-            .iter()
-            .filter(|pipeline| matches!(pipeline.state, CachedPipelineState::Ok(_)))
-            .count()
+    pub fn pipelines(&self) -> impl Iterator<Item = &CachedPipeline> {
+        self.pipelines.iter()
     }
 
     pub fn new(device: RenderDevice) -> Self {