basic working polygon renderer

src/client/render/util/texture.rs

@@ -0,0 +1,55 @@
+pub struct Texture {
+    pub texture: wgpu::Texture,
+    pub view: wgpu::TextureView,
+    pub sampler: wgpu::Sampler,
+}
+
+impl Texture {
+    pub const DEPTH_FORMAT: wgpu::TextureFormat = wgpu::TextureFormat::Depth32Float; // 1.
+
+    pub fn create_depth_texture(
+        device: &wgpu::Device,
+        config: &wgpu::SurfaceConfiguration,
+        label: &str,
+    ) -> Self {
+        let size = wgpu::Extent3d {
+            // 2.
+            width: config.width,
+            height: config.height,
+            depth_or_array_layers: 1,
+        };
+        let desc = wgpu::TextureDescriptor {
+            label: Some(label),
+            size,
+            mip_level_count: 1,
+            sample_count: 1,
+            dimension: wgpu::TextureDimension::D2,
+            format: Self::DEPTH_FORMAT,
+            usage: wgpu::TextureUsages::RENDER_ATTACHMENT // 3.
+                | wgpu::TextureUsages::TEXTURE_BINDING,
+            view_formats: &[],
+        };
+        let texture = device.create_texture(&desc);
+
+        let view = texture.create_view(&wgpu::TextureViewDescriptor::default());
+        let sampler = device.create_sampler(&wgpu::SamplerDescriptor {
+            // 4.
+            address_mode_u: wgpu::AddressMode::ClampToEdge,
+            address_mode_v: wgpu::AddressMode::ClampToEdge,
+            address_mode_w: wgpu::AddressMode::ClampToEdge,
+            mag_filter: wgpu::FilterMode::Linear,
+            min_filter: wgpu::FilterMode::Linear,
+            mipmap_filter: wgpu::FilterMode::Nearest,
+            compare: Some(wgpu::CompareFunction::LessEqual), // 5.
+            lod_min_clamp: 0.0,
+            lod_max_clamp: 100.0,
+            ..Default::default()
+        });
+
+        Self {
+            texture,
+            view,
+            sampler,
+        }
+    }
+}