Move ShaderCache shader defs into pipelines

crates/bevy_pbr/src/prepass/mod.rs

@@ -34,7 +34,7 @@ use bevy_render::{
         ShaderType, SpecializedMeshPipeline, SpecializedMeshPipelineError,
         SpecializedMeshPipelines, StencilFaceState, StencilState, TextureDescriptor,
         TextureDimension, TextureFormat, TextureSampleType, TextureUsages, TextureViewDimension,
-        VertexState,
+        VertexState, platform_shader_defs,
     },
     renderer::RenderDevice,
     texture::{FallbackImagesDepth, FallbackImagesMsaa, TextureCache},
@@ -161,6 +161,7 @@ pub struct PrepassPipeline<M: Material> {
     pub material_vertex_shader: Option<Handle<Shader>>,
     pub material_fragment_shader: Option<Handle<Shader>>,
     pub material_pipeline: MaterialPipeline<M>,
+    pub shader_defs: Vec<ShaderDefVal>,
     _marker: PhantomData<M>,
 }
 
@@ -199,6 +200,8 @@ impl<M: Material> FromWorld for PrepassPipeline<M> {
 
         let mesh_pipeline = world.resource::<MeshPipeline>();
 
+        let shader_defs = platform_shader_defs(render_device);
+
         PrepassPipeline {
             view_layout,
             mesh_layout: mesh_pipeline.mesh_layout.clone(),
@@ -215,6 +218,7 @@ impl<M: Material> FromWorld for PrepassPipeline<M> {
             },
             material_layout: M::bind_group_layout(render_device),
             material_pipeline: world.resource::<MaterialPipeline<M>>().clone(),
+            shader_defs,
             _marker: PhantomData,
         }
     }
@@ -232,7 +236,7 @@ where
         layout: &MeshVertexBufferLayout,
     ) -> Result<RenderPipelineDescriptor, SpecializedMeshPipelineError> {
         let mut bind_group_layout = vec![self.view_layout.clone()];
-        let mut shader_defs = Vec::new();
+        let mut shader_defs = self.shader_defs.clone();
         let mut vertex_attributes = Vec::new();
 
         // NOTE: Eventually, it would be nice to only add this when the shaders are overloaded by the Material.

crates/bevy_pbr/src/render/mesh.rs

@@ -273,6 +273,7 @@ pub struct MeshPipeline {
     // This dummy white texture is to be used in place of optional StandardMaterial textures
     pub dummy_white_gpu_image: GpuImage,
     pub clustered_forward_buffer_binding_type: BufferBindingType,
+    pub shader_defs: Vec<ShaderDefVal>,
 }
 
 impl FromWorld for MeshPipeline {
@@ -532,13 +533,17 @@ impl FromWorld for MeshPipeline {
             }
         };
 
+        // Shader defs
+        let shader_defs = platform_shader_defs(&render_device);
+
         MeshPipeline {
             view_layout,
             view_layout_multisampled,
             mesh_layout,
             skinned_mesh_layout,
             clustered_forward_buffer_binding_type,
             dummy_white_gpu_image,
+            shader_defs,
         }
     }
 }
@@ -654,7 +659,7 @@ impl SpecializedMeshPipeline for MeshPipeline {
         key: Self::Key,
         layout: &MeshVertexBufferLayout,
     ) -> Result<RenderPipelineDescriptor, SpecializedMeshPipelineError> {
-        let mut shader_defs = Vec::new();
+        let mut shader_defs = self.shader_defs.clone();
         let mut vertex_attributes = Vec::new();
 
         if layout.contains(Mesh::ATTRIBUTE_POSITION) {

crates/bevy_render/src/render_resource/pipeline_cache.rs

@@ -21,7 +21,8 @@ use parking_lot::Mutex;
 use std::{hash::Hash, iter::FusedIterator, mem, ops::Deref};
 use thiserror::Error;
 use wgpu::{
-    PipelineLayoutDescriptor, PushConstantRange, VertexBufferLayout as RawVertexBufferLayout,
+    PipelineLayoutDescriptor, PushConstantRange,
+    VertexBufferLayout as RawVertexBufferLayout,
 };
 
 use crate::render_resource::resource_macros::*;
@@ -193,25 +194,13 @@ impl ShaderCache {
         let module = match data.processed_shaders.entry(shader_defs.to_vec()) {
             Entry::Occupied(entry) => entry.into_mut(),
             Entry::Vacant(entry) => {
-                let mut shader_defs = shader_defs.to_vec();
-                #[cfg(feature = "webgl")]
-                {
-                    shader_defs.push("NO_ARRAY_TEXTURES_SUPPORT".into());
-                    shader_defs.push("SIXTEEN_BYTE_ALIGNMENT".into());
-                }
-
-                shader_defs.push(ShaderDefVal::UInt(
-                    String::from("AVAILABLE_STORAGE_BUFFER_BINDINGS"),
-                    render_device.limits().max_storage_buffers_per_shader_stage,
-                ));
-
                 debug!(
                     "processing shader {:?}, with shader defs {:?}",
                     handle, shader_defs
                 );
                 let processed = self.processor.process(
                     shader,
-                    &shader_defs,
+                    shader_defs,
                     &self.shaders,
                     &self.import_path_shaders,
                 )?;
@@ -310,7 +299,26 @@ impl ShaderCache {
     }
 }
 
+// Utility function for initializing a set of platform-driven shader defs from a render device
+pub fn platform_shader_defs(render_device: &RenderDevice) -> Vec<ShaderDefVal> {
+    let mut shader_defs = Vec::new();
+
+    #[cfg(feature = "webgl")]
+    {
+        shader_defs.push("NO_ARRAY_TEXTURES_SUPPORT".into());
+        shader_defs.push("SIXTEEN_BYTE_ALIGNMENT".into());
+    }
+
+    shader_defs.push(ShaderDefVal::UInt(
+        String::from("AVAILABLE_STORAGE_BUFFER_BINDINGS"),
+        render_device.limits().max_storage_buffers_per_shader_stage,
+    ));
+
+    shader_defs
+}
+
 type LayoutCacheKey = (Vec<BindGroupLayoutId>, Vec<PushConstantRange>);
+
 #[derive(Default)]
 struct LayoutCache {
     layouts: HashMap<LayoutCacheKey, ErasedPipelineLayout>,

crates/bevy_sprite/src/mesh2d/mesh.rs

@@ -164,6 +164,7 @@ pub struct Mesh2dPipeline {
     pub mesh_layout: BindGroupLayout,
     // This dummy white texture is to be used in place of optional textures
     pub dummy_white_gpu_image: GpuImage,
+    pub shader_defs: Vec<ShaderDefVal>,
 }
 
 impl FromWorld for Mesh2dPipeline {
@@ -211,6 +212,10 @@ impl FromWorld for Mesh2dPipeline {
             }],
             label: Some("mesh2d_layout"),
         });
+
+        // Shader defs
+        let shader_defs = platform_shader_defs(&render_device);
+
         // A 1x1x1 'all 1.0' texture to use as a dummy texture to use in place of optional StandardMaterial textures
         let dummy_white_gpu_image = {
             let image = Image::default();
@@ -256,10 +261,12 @@ impl FromWorld for Mesh2dPipeline {
                 mip_level_count: image.texture_descriptor.mip_level_count,
             }
         };
+
         Mesh2dPipeline {
             view_layout,
             mesh_layout,
             dummy_white_gpu_image,
+            shader_defs,
         }
     }
 }
@@ -362,7 +369,7 @@ impl SpecializedMeshPipeline for Mesh2dPipeline {
         key: Self::Key,
         layout: &MeshVertexBufferLayout,
     ) -> Result<RenderPipelineDescriptor, SpecializedMeshPipelineError> {
-        let mut shader_defs = Vec::new();
+        let mut shader_defs = self.shader_defs.clone();
         let mut vertex_attributes = Vec::new();
 
         if layout.contains(Mesh::ATTRIBUTE_POSITION) {