Implement side-by-side view

src/window/game_screen.rs

@@ -1,6 +1,6 @@
 use std::{collections::HashMap, sync::Arc};
 
-use egui::{Color32, Rgba, Widget};
+use egui::{Color32, Rgba, Vec2, Widget};
 use wgpu::{util::DeviceExt as _, BindGroup, BindGroupLayout, Buffer, RenderPipeline};
 
 use crate::graphics::TextureSink;
@@ -48,7 +48,7 @@ impl GameScreen {
             ],
         });
 
-        let shader = device.create_shader_module(wgpu::include_wgsl!("../anaglyph.wgsl"));
+        let shader = device.create_shader_module(wgpu::include_wgsl!("../game.wgsl"));
         let render_pipeline_layout =
             device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
                 label: Some("render pipeline layout"),
@@ -100,6 +100,10 @@ impl GameScreen {
         render_pipelines.insert(DisplayMode::Anaglyph, create_render_pipeline("fs_anaglyph"));
         render_pipelines.insert(DisplayMode::LeftEye, create_render_pipeline("fs_lefteye"));
         render_pipelines.insert(DisplayMode::RightEye, create_render_pipeline("fs_righteye"));
+        render_pipelines.insert(
+            DisplayMode::SideBySide,
+            create_render_pipeline("fs_sidebyside"),
+        );
 
         render_state
             .renderer
@@ -217,7 +221,10 @@ impl egui_wgpu::CallbackTrait for GameScreenCallback {
         let top = viewport.top_px as f32;
         let width = viewport.width_px as f32;
         let height = viewport.height_px as f32;
-        let aspect_ratio = 384.0 / 224.0;
+        let aspect_ratio = {
+            let proportions = self.display_mode.proportions();
+            proportions.x / proportions.y
+        };
         let w = width.min(height * aspect_ratio);
         let h = height.min(width / aspect_ratio);
         let x = left + (width - w) / 2.0;
@@ -258,4 +265,14 @@ pub enum DisplayMode {
     Anaglyph,
     LeftEye,
     RightEye,
+    SideBySide,
+}
+
+impl DisplayMode {
+    pub fn proportions(self) -> Vec2 {
+        match self {
+            Self::SideBySide => Vec2::new(768.0, 224.0),
+            _ => Vec2::new(384.0, 224.0),
+        }
+    }
 }