[oden] Cleaner textures

Cargo.lock

@@ -86,6 +86,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "anyhow"
+version = "1.0.71"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c7d0618f0e0b7e8ff11427422b64564d5fb0be1940354bfe2e0529b18a9d9b8"
+
 [[package]]
 name = "arrayref"
 version = "0.3.7"
@@ -966,6 +972,7 @@ dependencies = [
 name = "oden"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "bytemuck",
  "env_logger",
  "image",

Cargo.toml

@@ -6,6 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+anyhow = "1.0"
 bytemuck = { version = "1.13", features = ["derive"] }
 env_logger = "0.10"
 image = { version = "0.24", default-features = false, features = ["png"] }

src/lib.rs

@@ -1,5 +1,4 @@
 use bytemuck;
-use image;
 use wgpu::util::DeviceExt;
 use winit::{
     event::*,
@@ -8,6 +7,8 @@ use winit::{
     window::WindowBuilder,
 };
 
+mod texture;
+
 #[repr(C)]
 #[derive(Copy, Clone, Debug, bytemuck::Pod, bytemuck::Zeroable)]
 struct Vertex {
@@ -15,7 +16,6 @@ struct Vertex {
     tex_coords: [f32; 2],
 }
 
-// lib.rs
 impl Vertex {
     fn desc() -> wgpu::VertexBufferLayout<'static> {
         wgpu::VertexBufferLayout {
@@ -153,72 +153,8 @@ impl State {
         surface.configure(&device, &config);
 
         let diffuse_bytes = include_bytes!("happy-tree.png");
-        let diffuse_image = image::load_from_memory(diffuse_bytes).unwrap();
-        let diffuse_rgba = diffuse_image.to_rgba8();
-
-        use image::GenericImageView;
-        let dimensions = diffuse_image.dimensions();
-
-        let texture_size = wgpu::Extent3d {
-            width: dimensions.0,
-            height: dimensions.1,
-            depth_or_array_layers: 1,
-        };
-        let diffuse_texture = device.create_texture(&wgpu::TextureDescriptor {
-            // All textures are stored as 3D, we represent our 2D texture
-            // by setting depth to 1.
-            size: texture_size,
-            mip_level_count: 1,
-            sample_count: 1,
-            dimension: wgpu::TextureDimension::D2,
-            // Most images are stored using sRGB so we need to reflect that here.
-            format: wgpu::TextureFormat::Rgba8UnormSrgb,
-            // TEXTURE_BINDING tells wgpu that we want to use this texture in shaders
-            // COPY_DST means that we want to copy data to this texture
-            usage: wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::COPY_DST,
-            label: Some("diffuse_texture"),
-
-            // This is the same as with the SurfaceConfig. It specifies what
-            // texture formats can be used to create TextureViews for this
-            // texture. The base texture format (Rgba8UnormSrgb in this case)
-            // is always supported. Note that using a different texture
-            // format is not supported on the WebGL2 backend.
-            view_formats: &[],
-        });
-
-        // Jam the bits into the texture
-        queue.write_texture(
-            // Tells wgpu where to copy the pixel data
-            wgpu::ImageCopyTexture {
-                texture: &diffuse_texture,
-                mip_level: 0,
-                origin: wgpu::Origin3d::ZERO,
-                aspect: wgpu::TextureAspect::All,
-            },
-            // The actual pixel data
-            &diffuse_rgba,
-            // The layout of the texture
-            wgpu::ImageDataLayout {
-                offset: 0,
-                bytes_per_row: Some(4 * dimensions.0),
-                rows_per_image: Some(dimensions.1),
-            },
-            texture_size,
-        );
-
-        // We don't need to configure the texture view much, so let's
-        // let wgpu define it.
-        let diffuse_texture_view =
-            diffuse_texture.create_view(&wgpu::TextureViewDescriptor::default());
-        let diffuse_sampler = device.create_sampler(&wgpu::SamplerDescriptor {
-            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::Nearest,
-            mipmap_filter: wgpu::FilterMode::Nearest,
-            ..Default::default()
-        });
+        let diffuse_texture =
+            texture::Texture::from_bytes(&device, &queue, diffuse_bytes, "happy-tree.png").unwrap();
 
         let texture_bind_group_layout =
             device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
@@ -250,11 +186,11 @@ impl State {
             entries: &[
                 wgpu::BindGroupEntry {
                     binding: 0,
-                    resource: wgpu::BindingResource::TextureView(&diffuse_texture_view),
+                    resource: wgpu::BindingResource::TextureView(&diffuse_texture.view),
                 },
                 wgpu::BindGroupEntry {
                     binding: 1,
-                    resource: wgpu::BindingResource::Sampler(&diffuse_sampler),
+                    resource: wgpu::BindingResource::Sampler(&diffuse_texture.sampler),
                 },
             ],
             label: Some("diffuse_bind_group"),

src/texture.rs

@@ -0,0 +1,79 @@
+use anyhow::*;
+use image::GenericImageView;
+
+pub struct Texture {
+    pub texture: wgpu::Texture,
+    pub view: wgpu::TextureView,
+    pub sampler: wgpu::Sampler,
+}
+
+impl Texture {
+    pub fn from_bytes(
+        device: &wgpu::Device,
+        queue: &wgpu::Queue,
+        bytes: &[u8],
+        label: &str,
+    ) -> Result<Self> {
+        let img = image::load_from_memory(bytes)?;
+        Self::from_image(device, queue, &img, Some(label))
+    }
+
+    pub fn from_image(
+        device: &wgpu::Device,
+        queue: &wgpu::Queue,
+        img: &image::DynamicImage,
+        label: Option<&str>,
+    ) -> Result<Self> {
+        let rgba = img.to_rgba8();
+        let dimensions = img.dimensions();
+
+        let size = wgpu::Extent3d {
+            width: dimensions.0,
+            height: dimensions.1,
+            depth_or_array_layers: 1,
+        };
+        let texture = device.create_texture(&wgpu::TextureDescriptor {
+            label,
+            size,
+            mip_level_count: 1,
+            sample_count: 1,
+            dimension: wgpu::TextureDimension::D2,
+            format: wgpu::TextureFormat::Rgba8UnormSrgb,
+            usage: wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::COPY_DST,
+            view_formats: &[],
+        });
+
+        queue.write_texture(
+            wgpu::ImageCopyTexture {
+                aspect: wgpu::TextureAspect::All,
+                texture: &texture,
+                mip_level: 0,
+                origin: wgpu::Origin3d::ZERO,
+            },
+            &rgba,
+            wgpu::ImageDataLayout {
+                offset: 0,
+                bytes_per_row: Some(4 * dimensions.0),
+                rows_per_image: Some(dimensions.1),
+            },
+            size,
+        );
+
+        let view = texture.create_view(&wgpu::TextureViewDescriptor::default());
+        let sampler = device.create_sampler(&wgpu::SamplerDescriptor {
+            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::Nearest,
+            mipmap_filter: wgpu::FilterMode::Nearest,
+            ..Default::default()
+        });
+
+        Ok(Self {
+            texture,
+            view,
+            sampler,
+        })
+    }
+}