Added texture config file

src/render/texturearray.rs

@@ -1,4 +1,5 @@
 use anyhow::Result;
+use serde::Deserialize;
 use std::{collections::HashMap, fs::File, io::Read, num::NonZeroU32};
 use wgpu::BindGroupLayout;
 
@@ -7,50 +8,88 @@ use super::rawtexture::RawTexture;
 pub struct TextureArray {
 	pub bind_group: wgpu::BindGroup,
 	pub bind_group_layout: BindGroupLayout,
-	texture_dims: Vec<(u32, u32)>,
-	texture_indices: HashMap<String, u32>,
+	textures: HashMap<String, Texture>,
+	error_texture: Texture,
 }
 
-const TEX: &[&str] = &["error", "small", "gypsum", "earth", "a0"];
-
+#[derive(Debug, Clone, Copy)]
 pub struct Texture {
 	pub index: u32,  // Index in texture array
 	pub aspect: f32, // width / height
 	pub height: f32, // Height in game units
 }
 
+#[derive(Deserialize)]
+struct Textures {
+	texture: Vec<Tex>,
+	error: Tex,
+}
+
+#[derive(Deserialize)]
+struct Tex {
+	name: String,
+	path: String,
+	height: f32,
+}
+
+impl Tex {
+	pub fn read(&self, device: &wgpu::Device, queue: &wgpu::Queue) -> Result<RawTexture> {
+		let p = format!("{}/{}", TextureArray::INDEX_ROOT, self.path);
+		let mut f = File::open(&p)?;
+		let mut bytes = Vec::new();
+		f.read_to_end(&mut bytes)?;
+		RawTexture::from_bytes(&device, &queue, &bytes, &self.name)
+	}
+}
+
 impl TextureArray {
+	const INDEX_PATH: &'static str = "assets/index.toml";
+	const INDEX_ROOT: &'static str = "assets";
+
 	pub fn get_texture(&self, name: &str) -> Texture {
-		let index = match self.texture_indices.get(name) {
+		match self.textures.get(name) {
 			Some(x) => *x,
-			None => 0, // Default texture
-		};
-
-		let dimensions = self.texture_dims[index as usize];
-
-		return Texture {
-			index,
-			height: 100.0,
-			aspect: dimensions.0 as f32 / dimensions.1 as f32,
-		};
+			None => self.error_texture,
+		}
 	}
 
 	pub fn new(device: &wgpu::Device, queue: &wgpu::Queue) -> Result<Self> {
-		let mut textures: Vec<RawTexture> = Vec::new();
-		let mut texture_indices: HashMap<String, u32> = HashMap::new();
+		// Load all textures
 
-		let mut i = 0;
-		for t in TEX {
-			let p = format!("assets/{t}.png");
-			let mut f = File::open(&p)?;
-			let mut bytes = Vec::new();
-			f.read_to_end(&mut bytes)?;
-			textures.push(RawTexture::from_bytes(&device, &queue, &bytes, &p).unwrap());
-			texture_indices.insert(t.to_string(), i);
-			i += 1;
-		}
+		let (error_texture, textures, texture_data) = {
+			let mut texture_data: Vec<RawTexture> = Vec::new();
+			let mut textures: HashMap<String, Texture> = HashMap::new();
+
+			let mut texture_index_string = String::new();
+			let _ = File::open(Self::INDEX_PATH)?.read_to_string(&mut texture_index_string);
+			let texture_index: Textures = toml::from_str(&texture_index_string)?;
+
+			// First texture is always error
+			let raw = texture_index.error.read(device, queue)?;
+			let error_texture = Texture {
+				index: 0,
+				height: texture_index.error.height,
+				aspect: raw.dimensions.0 as f32 / raw.dimensions.1 as f32,
+			};
+			texture_data.push(raw);
+
+			// Load the rest
+			let mut i = 1;
+			for t in texture_index.texture {
+				let raw = t.read(device, queue)?;
+				let tx = Texture {
+					index: i,
+					height: t.height,
+					aspect: raw.dimensions.0 as f32 / raw.dimensions.1 as f32,
+				};
+				textures.insert(t.name.clone(), tx);
+				texture_data.push(raw);
+				i += 1;
+			}
+
+			(error_texture, textures, texture_data)
+		};
 
-		// One of these overall
 		let sampler = device.create_sampler(&wgpu::SamplerDescriptor {
 			address_mode_u: wgpu::AddressMode::ClampToEdge,
 			address_mode_v: wgpu::AddressMode::ClampToEdge,
@@ -73,19 +112,19 @@ impl TextureArray {
 						view_dimension: wgpu::TextureViewDimension::D2,
 						sample_type: wgpu::TextureSampleType::Float { filterable: true },
 					},
-					count: NonZeroU32::new(textures.len() as u32),
+					count: NonZeroU32::new(texture_data.len() as u32),
 				},
 				// Texture sampler
 				wgpu::BindGroupLayoutEntry {
 					binding: 1,
 					visibility: wgpu::ShaderStages::FRAGMENT,
 					ty: wgpu::BindingType::Sampler(wgpu::SamplerBindingType::Filtering),
-					count: NonZeroU32::new(textures.len() as u32),
+					count: NonZeroU32::new(texture_data.len() as u32),
 				},
 			],
 		});
 
-		let views: Vec<&wgpu::TextureView> = textures.iter().map(|x| &x.view).collect();
+		let views: Vec<&wgpu::TextureView> = texture_data.iter().map(|x| &x.view).collect();
 		let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
 			label: Some("texture_bind_group"),
 			layout: &bind_group_layout,
@@ -105,8 +144,8 @@ impl TextureArray {
 		return Ok(Self {
 			bind_group,
 			bind_group_layout,
-			texture_dims: textures.iter().map(|x| x.dimensions).collect(),
-			texture_indices,
+			textures,
+			error_texture,
 		});
 	}
 }