Implement vertex buffers

res/shader.wgsl

@@ -1,17 +1,22 @@
 // Vertex shader
 
+struct VertexInput {
+    @location(0) position: vec3<f32>,
+    @location(1) color: vec3<f32>,
+};
+
 struct VertexOutput {
     @builtin(position) clip_position: vec4<f32>,
+    @location(0) color: vec3<f32>,
 };
 
 @vertex
 fn vs_main(
-    @builtin(vertex_index) in_vertex_index: u32,
+    model: VertexInput,
 ) -> VertexOutput {
     var out: VertexOutput;
-    let x = f32(1 - i32(in_vertex_index)) * 0.5;
-    let y = f32(i32(in_vertex_index & 1u) * 2 - 1) * 0.5;
-    out.clip_position = vec4<f32>(x, y, 0.0, 1.0);
+    out.color = model.color;
+    out.clip_position = vec4<f32>(model.position, 1.0);
     return out;
 }
 
@@ -19,5 +24,5 @@ fn vs_main(
 
 @fragment
 fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
-    return vec4<f32>(0.3, 0.2, 0.1, 1.0);
+    return vec4<f32>(in.color, 1.0);
 }

src/ecs/components/mod.rs

@@ -0,0 +1 @@
+pub mod model_2d;

src/ecs/components/model_2d.rs

@@ -0,0 +1,4 @@
+#[derive(Component, Debug, Default)]
+pub struct Model2d {
+    pub vertices: Vec<Vertex>,
+}

src/ecs/mod.rs

@@ -0,0 +1 @@
+pub mod components;

src/game.rs

@@ -13,7 +13,7 @@ use tracing_subscriber::{
 
 use winit::{window::{WindowBuilder, Window}, event::{Event, WindowEvent, KeyboardInput, ElementState, VirtualKeyCode}, event_loop::{EventLoop, ControlFlow}};
 
-use crate::{renderer::{Renderer, BasicRenderer}, input_event::InputEvent};
+use crate::{render::renderer::{Renderer, BasicRenderer}, input_event::InputEvent};
 
 struct GameLoop<'a, 'b> {
     window: Arc<Window>,
@@ -125,7 +125,7 @@ impl<'a, 'b> GameLoop<'a, 'b> {
                 match self.renderer.as_mut().render().await {
                     Ok(_) => {}
                     // Reconfigure the surface if lost
-                    Err(wgpu::SurfaceError::Lost) => self.on_resize(self.renderer.as_ref().size()).await,
+                    Err(wgpu::SurfaceError::Lost) => self.on_resize(self.renderer.as_ref().surface_size()).await,
                     // The system is out of memory, we should probably quit
                     Err(wgpu::SurfaceError::OutOfMemory) => *control_flow = ControlFlow::Exit,
                     // All other errors (Outdated, Timeout) should be resolved by the next frame

src/main.rs

@@ -1,6 +1,6 @@
 mod system;
 mod game;
-mod renderer;
+mod render;
 mod input_event;
 mod resources;
 

src/render/desc_buf_lay.rs

@@ -0,0 +1,3 @@
+pub trait DescVertexBufferLayout {
+    fn desc<'a>() -> wgpu::VertexBufferLayout<'a>;
+}

src/render/mod.rs

@@ -0,0 +1,5 @@
+pub mod renderer;
+pub mod render_pipeline;
+pub mod vertex;
+pub mod desc_buf_lay;
+pub mod render_buffer;

src/render/render_buffer.rs

@@ -0,0 +1,42 @@
+use super::{desc_buf_lay::DescVertexBufferLayout, vertex::Vertex};
+
+#[derive(Debug)]
+pub enum RenderBuffer {
+    VertexBuffer(BufferStorage),
+}
+
+impl RenderBuffer {
+    pub fn desc<'a>(&self) -> wgpu::VertexBufferLayout<'a> {
+        match self {
+            RenderBuffer::VertexBuffer(b) => Vertex::desc(),
+            _ => panic!("Cannot create a VertexBufferLayout for {:?}!", *self)
+        }
+    }
+}
+
+#[derive(Debug)]
+pub struct BufferStorage {
+    buffer: wgpu::Buffer,
+    slot: u32,
+}
+
+impl BufferStorage {
+    pub fn new(buffer: wgpu::Buffer, slot: u32) -> Self {
+        Self {
+            buffer,
+            slot,
+        }
+    }
+
+    pub fn buffer(&self) -> &wgpu::Buffer {
+        &self.buffer
+    }
+
+    pub fn buffer_mut(&mut self) -> &mut wgpu::Buffer {
+        &mut self.buffer
+    }
+
+    pub fn slot(&self) -> u32 {
+        self.slot
+    }
+}

src/render/render_pipeline.rs

@@ -0,0 +1,93 @@
+use std::ops::Range;
+
+use wgpu::{TextureFormat, PipelineLayout, RenderPipeline, VertexBufferLayout, RenderPass};
+
+use super::render_buffer::RenderBuffer;
+
+pub struct FullRenderPipeline {
+    layout: PipelineLayout,
+    wgpu_pipeline: RenderPipeline,
+    buffers: Vec<RenderBuffer>,
+}
+
+impl FullRenderPipeline {
+    pub fn new(device: &wgpu::Device, config: &wgpu::SurfaceConfiguration, shader: &wgpu::ShaderModule, buffers: Vec<RenderBuffer>) -> Self {
+        let buffer_layouts: Vec<VertexBufferLayout> = buffers.iter().map(|b| match b {
+            RenderBuffer::VertexBuffer(_) => b.desc()
+        }).collect();
+
+        let render_pipeline_layout =
+            device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
+                label: Some("Render Pipeline Layout"),
+                bind_group_layouts: &[],
+                push_constant_ranges: &[],
+            });
+
+        let render_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
+            label: Some("Render Pipeline"),
+            layout: Some(&render_pipeline_layout),
+            vertex: wgpu::VertexState {
+                module: &shader,
+                entry_point: "vs_main",
+                buffers: &buffer_layouts,
+            },
+            fragment: Some(wgpu::FragmentState {
+                module: &shader,
+                entry_point: "fs_main",
+                targets: &[Some(wgpu::ColorTargetState { 
+                    format: config.format,
+                    blend: Some(wgpu::BlendState::REPLACE),
+                    write_mask: wgpu::ColorWrites::ALL,
+                })],
+            }),
+            primitive: wgpu::PrimitiveState {
+                topology: wgpu::PrimitiveTopology::TriangleList,
+                strip_index_format: None,
+                front_face: wgpu::FrontFace::Ccw,
+                cull_mode: Some(wgpu::Face::Back),
+                // Setting this to anything other than Fill requires Features::NON_FILL_POLYGON_MODE
+                polygon_mode: wgpu::PolygonMode::Fill,
+                // Requires Features::DEPTH_CLIP_CONTROL
+                unclipped_depth: false,
+                // Requires Features::CONSERVATIVE_RASTERIZATION
+                conservative: false,
+            },
+            depth_stencil: None,
+            multisample: wgpu::MultisampleState {
+                count: 1,
+                mask: !0,
+                alpha_to_coverage_enabled: false,
+            },
+            multiview: None,
+        });
+
+        Self {
+            layout: render_pipeline_layout,
+            wgpu_pipeline: render_pipeline,
+            buffers,
+        }
+    }
+
+    pub fn get_layout(&self) -> &PipelineLayout {
+        &self.layout
+    }
+
+    pub fn get_wgpu_pipeline(&self) -> &RenderPipeline {
+        &self.wgpu_pipeline
+    }
+
+    pub fn render<'a>(&'a self, pass: &mut RenderPass<'a>, vertices: Range<u32>, instances: Range<u32>) {
+        pass.set_pipeline(&self.wgpu_pipeline);
+
+        for buffer in self.buffers.iter() {
+            match buffer {
+                RenderBuffer::VertexBuffer(b) => {
+                    pass.set_vertex_buffer(b.slot(), b.buffer().slice(..));
+                },
+                _ => {}
+            }
+        }
+
+        pass.draw(vertices, instances);
+    }
+}

src/render/renderer.rs

@@ -3,20 +3,22 @@ use std::borrow::Cow;
 
 use async_trait::async_trait;
 
+use wgpu::util::DeviceExt;
 //use winit::{window::Window, event::WindowEvent};
 //use winit::window::Window;
 use winit::{window::Window, event::WindowEvent};
 
 use crate::resources;
 
+use super::{render_pipeline::FullRenderPipeline, vertex::{Vertex, VERTICES}, desc_buf_lay::DescVertexBufferLayout, render_buffer::{BufferStorage, RenderBuffer}};
+
 #[async_trait]
 pub trait Renderer {
-    //fn new(surface: wgpu::Surface, config: wgpu::SurfaceConfiguration, device: wgpu::Device)
-    //async fn create_with_window(window: Window) -> Self;
     async fn render(&mut self) -> Result<(), wgpu::SurfaceError>;
     async fn on_resize(&mut self, new_size: winit::dpi::PhysicalSize<u32>);
 
-    fn size(&self) -> winit::dpi::PhysicalSize<u32>;
+    fn surface_size(&self) -> winit::dpi::PhysicalSize<u32>;
+    fn add_render_pipeline(&mut self, pipeline: FullRenderPipeline);
 }
 
 pub struct BasicRenderer {
@@ -29,7 +31,7 @@ pub struct BasicRenderer {
 
     pub clear_color: wgpu::Color,
 
-    pub render_pipeline: wgpu::RenderPipeline,
+    pub render_pipelines: Vec<FullRenderPipeline>,
 }
 
 impl BasicRenderer {
@@ -87,58 +89,26 @@ impl BasicRenderer {
         };
         surface.configure(&device, &config);
 
+
+
         let shader_src = resources::load_string("shader.wgsl").await.expect("Failed to load shader!");
         let shader = device.create_shader_module(wgpu::ShaderModuleDescriptor {
             label: Some("Shader"),
             source: wgpu::ShaderSource::Wgsl(Cow::Borrowed(&shader_src)),
         });
 
-        // Create a render pipeline. At some point this will be created by something else and given to the renderer
+        let vertex_buffer = device.create_buffer_init(
+            &wgpu::util::BufferInitDescriptor {
+                label: Some("Vertex Buffer"),
+                contents: bytemuck::cast_slice(super::vertex::VERTICES),
+                usage: wgpu::BufferUsages::VERTEX,
+            }
+        );
 
-        let render_pipeline_layout =
-            device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
-                label: Some("Render Pipeline Layout"),
-                bind_group_layouts: &[],
-                push_constant_ranges: &[],
-            });
-
-            let render_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
-                label: Some("Render Pipeline"),
-                layout: Some(&render_pipeline_layout),
-                vertex: wgpu::VertexState {
-                    module: &shader,
-                    entry_point: "vs_main",
-                    buffers: &[],
-                },
-                fragment: Some(wgpu::FragmentState {
-                    module: &shader,
-                    entry_point: "fs_main",
-                    targets: &[Some(wgpu::ColorTargetState { 
-                        format: config.format,
-                        blend: Some(wgpu::BlendState::REPLACE),
-                        write_mask: wgpu::ColorWrites::ALL,
-                    })],
-                }),
-                primitive: wgpu::PrimitiveState {
-                    topology: wgpu::PrimitiveTopology::TriangleList,
-                    strip_index_format: None,
-                    front_face: wgpu::FrontFace::Ccw,
-                    cull_mode: Some(wgpu::Face::Back),
-                    // Setting this to anything other than Fill requires Features::NON_FILL_POLYGON_MODE
-                    polygon_mode: wgpu::PolygonMode::Fill,
-                    // Requires Features::DEPTH_CLIP_CONTROL
-                    unclipped_depth: false,
-                    // Requires Features::CONSERVATIVE_RASTERIZATION
-                    conservative: false,
-                },
-                depth_stencil: None,
-                multisample: wgpu::MultisampleState {
-                    count: 1,
-                    mask: !0,
-                    alpha_to_coverage_enabled: false,
-                },
-                multiview: None,
-            });
+        let pipelines = vec![
+            FullRenderPipeline::new(&device, &config, &shader, 
+                vec![RenderBuffer::VertexBuffer(BufferStorage::new(vertex_buffer, 0))])
+        ];
 
         Self {
             window,
@@ -153,7 +123,7 @@ impl BasicRenderer {
                 b: 0.3,
                 a: 1.0,
             },
-            render_pipeline
+            render_pipelines: pipelines,
         }
     }
 }
@@ -169,7 +139,8 @@ impl Renderer for BasicRenderer {
             label: Some("Basic Renderer's Encoder")
         });
 
-        {
+        // Loop through all the render pipelines and draw the buffers.
+        for pipeline in self.render_pipelines.iter() {
             let mut render_pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
                 label: Some("Basic Renderer's Render Pass"),
                 color_attachments: &[Some(wgpu::RenderPassColorAttachment {
@@ -183,8 +154,7 @@ impl Renderer for BasicRenderer {
                 depth_stencil_attachment: None,
             });
 
-            render_pass.set_pipeline(&self.render_pipeline);
-            render_pass.draw(0..3, 0..1);
+            pipeline.render(&mut render_pass, 0..VERTICES.len() as u32, 0..1);
         }
 
         self.queue.submit(std::iter::once(encoder.finish()));
@@ -202,7 +172,11 @@ impl Renderer for BasicRenderer {
         }
     }
 
-    fn size(&self) -> winit::dpi::PhysicalSize<u32> {
+    fn surface_size(&self) -> winit::dpi::PhysicalSize<u32> {
         self.size
     }
+
+    fn add_render_pipeline(&mut self, pipeline: FullRenderPipeline) {
+        self.render_pipelines.push(pipeline);
+    }
 }

src/render/vertex.rs

@@ -0,0 +1,35 @@
+use super::desc_buf_lay::DescVertexBufferLayout;
+
+#[repr(C)]
+#[derive(Copy, Clone, Debug, bytemuck::Pod, bytemuck::Zeroable)]
+pub struct Vertex {
+    pub position: [f32; 3],
+    pub color: [f32; 3],
+}
+
+pub const VERTICES: &[Vertex] = &[
+    Vertex { position: [0.0, 0.5, 0.0], color: [1.0, 0.0, 0.0] },
+    Vertex { position: [-0.5, -0.5, 0.0], color: [0.0, 1.0, 0.0] },
+    Vertex { position: [0.5, -0.5, 0.0], color: [0.0, 0.0, 1.0] },
+];
+
+impl DescVertexBufferLayout for Vertex {
+    fn desc<'a>() -> wgpu::VertexBufferLayout<'a> {
+        wgpu::VertexBufferLayout {
+            array_stride: std::mem::size_of::<Vertex>() as wgpu::BufferAddress,
+            step_mode: wgpu::VertexStepMode::Vertex,
+            attributes: &[
+                wgpu::VertexAttribute {
+                    offset: 0,
+                    shader_location: 0,
+                    format: wgpu::VertexFormat::Float32x3,
+                },
+                wgpu::VertexAttribute {
+                    offset: std::mem::size_of::<[f32; 3]>() as wgpu::BufferAddress,
+                    shader_location: 1,
+                    format: wgpu::VertexFormat::Float32x3,
+                }
+            ]
+        }
+    }
+}