move wgpu shader code out of Shader

src/render/render_graph_2/renderers/wgpu_renderer.rs

@@ -1,11 +1,11 @@
 use crate::{
     legion::prelude::*,
-    render::render_graph_2::{
+    render::{Shader, render_graph_2::{
         resource_name, update_shader_assignments, BindGroup, BindType, DynamicUniformBufferInfo,
         PassDescriptor, PipelineDescriptor, RenderGraph, RenderPass,
         RenderPassColorAttachmentDescriptor, RenderPassDepthStencilAttachmentDescriptor, Renderer,
         ResourceInfo, ShaderUniforms, TextureDescriptor,
-    },
+    }},
 };
 use std::{collections::HashMap, ops::Deref};
 
@@ -70,12 +70,11 @@ impl WgpuRenderer {
         bind_group_layouts: &mut HashMap<u64, wgpu::BindGroupLayout>,
         device: &wgpu::Device,
     ) -> wgpu::RenderPipeline {
-        let vertex_shader_module = pipeline_descriptor
+        let vertex_shader_module = Self::create_shader_module(device, &pipeline_descriptor
             .shader_stages
-            .vertex
-            .create_shader_module(device);
+            .vertex, None);
         let fragment_shader_module = match pipeline_descriptor.shader_stages.fragment {
-            Some(ref fragment_shader) => Some(fragment_shader.create_shader_module(device)),
+            Some(ref fragment_shader) => Some(Self::create_shader_module(device, fragment_shader, None)),
             None => None,
         };
 
@@ -411,6 +410,10 @@ impl WgpuRenderer {
             encoder.copy_buffer_to_buffer(&temp_buffer, 0, uniform_buffer.unwrap(), 0, size);
         }
     }
+
+    pub fn create_shader_module(device: &wgpu::Device, shader: &Shader, macros: Option<&[String]>) -> wgpu::ShaderModule {
+        device.create_shader_module(&shader.get_spirv(macros))
+    }
 }
 
 impl Renderer for WgpuRenderer {

src/render/shader.rs

@@ -20,7 +20,7 @@ impl Into<shaderc::ShaderKind> for ShaderStage {
 pub fn glsl_to_spirv(
     glsl_source: &str,
     stage: ShaderStage,
-    shader_defs: Option<&Vec<String>>,
+    shader_defs: Option<&[String]>,
 ) -> Vec<u32> {
     let shader_kind: shaderc::ShaderKind = stage.into();
     let mut compiler = shaderc::Compiler::new().unwrap();
@@ -52,7 +52,6 @@ pub struct Shader {
     pub source: ShaderSource,
     pub stage: ShaderStage,
     pub entry_point: String,
-    pub macros: Option<Vec<String>>,
 }
 
 impl Shader {
@@ -60,22 +59,25 @@ impl Shader {
         Shader {
             source: ShaderSource::Glsl(glsl.to_string()),
             entry_point: "main".to_string(),
-            macros: None,
             stage,
         }
     }
 
-    pub fn get_spirv(&self) -> Vec<u32> {
+    pub fn get_spirv(&self, macros: Option<&[String]>) -> Vec<u32> {
         match self.source {
             ShaderSource::Spirv(ref bytes) => bytes.clone(),
             ShaderSource::Glsl(ref source) => {
-                glsl_to_spirv(&source, self.stage, self.macros.as_ref())
+                glsl_to_spirv(&source, self.stage, macros)
             }
         }
     }
 
-    pub fn create_shader_module(&self, device: &wgpu::Device) -> wgpu::ShaderModule {
-        device.create_shader_module(&self.get_spirv())
+    pub fn get_spirv_shader(&self, macros: Option<&[String]>) -> Shader {
+        Shader {
+            source: ShaderSource::Spirv(self.get_spirv(macros)),
+            entry_point: self.entry_point.clone(),
+            stage: self.stage,
+        }
     }
 }