From 9a01ecd6f2b06098697791b1955887cdfa317fd9 Mon Sep 17 00:00:00 2001
From: griffi-gh <prasol258@gmail.com>
Date: Mon, 6 May 2024 16:17:01 +0200
Subject: [PATCH] depth, wip

---
 kubi/src/rendering.rs       |  5 ++-
 kubi/src/rendering/depth.rs | 67 +++++++++++++++++++++++++++++++++++++
 2 files changed, 69 insertions(+), 3 deletions(-)
 create mode 100644 kubi/src/rendering/depth.rs

diff --git a/kubi/src/rendering.rs b/kubi/src/rendering.rs
index e42a91b..215e597 100644
--- a/kubi/src/rendering.rs
+++ b/kubi/src/rendering.rs
@@ -10,6 +10,8 @@ use self::camera::update_camera_unform_buffer;
 
 pub mod world;
 pub mod camera;
+pub mod depth;
+
 //pub mod primitives;
 //pub mod selection_box;
 //pub mod entities;
@@ -107,9 +109,6 @@ pub fn render_master(storages: AllStoragesViewMut) {
   };
 
   if storages.run(is_ingame) {
-    //XXX: probably should be in pre_update or sth
-    storages.run(update_camera_unform_buffer);
-
     //TODO init world render state on demand
     storages.run_with_data(world::draw_world, &mut data);
   }
diff --git a/kubi/src/rendering/depth.rs b/kubi/src/rendering/depth.rs
new file mode 100644
index 0000000..6c0f840
--- /dev/null
+++ b/kubi/src/rendering/depth.rs
@@ -0,0 +1,67 @@
+use glam::{uvec2, UVec2};
+
+use super::Renderer;
+
+pub struct DepthTexture {
+  pub depth_texture: wgpu::Texture,
+  pub depth_view: wgpu::TextureView,
+  pub depth_sampler: wgpu::Sampler,
+}
+
+impl DepthTexture {
+  fn desc(size: UVec2) -> wgpu::TextureDescriptor<'static> {
+    wgpu::TextureDescriptor {
+      label: Some("depth_texture"),
+      size: wgpu::Extent3d {
+        width: size.x,
+        height: size.y,
+        depth_or_array_layers: 1,
+      },
+      mip_level_count: 1,
+      sample_count: 1,
+      dimension: wgpu::TextureDimension::D2,
+      format: wgpu::TextureFormat::Depth32Float,
+      usage: wgpu::TextureUsages::RENDER_ATTACHMENT | wgpu::TextureUsages::TEXTURE_BINDING,
+      view_formats: &[wgpu::TextureFormat::Depth32Float],
+    }
+  }
+
+  pub fn init(renderer: &Renderer) -> Self {
+    let size = uvec2(renderer.size().width, renderer.size().height);
+    let depth_texture_desc = Self::desc(size);
+    let depth_texture = renderer.device().create_texture(&depth_texture_desc);
+    let depth_view = depth_texture.create_view(&wgpu::TextureViewDescriptor::default());
+    let depth_sampler = renderer.device().create_sampler(&wgpu::SamplerDescriptor {
+      label: Some("depth_sampler"),
+      address_mode_u: wgpu::AddressMode::ClampToEdge,
+      address_mode_v: wgpu::AddressMode::ClampToEdge,
+      address_mode_w: wgpu::AddressMode::ClampToEdge,
+      mag_filter: wgpu::FilterMode::Nearest,
+      min_filter: wgpu::FilterMode::Nearest,
+      mipmap_filter: wgpu::FilterMode::Nearest,
+      compare: Some(wgpu::CompareFunction::LessEqual),
+      ..Default::default()
+    });
+    Self { depth_texture, depth_view, depth_sampler }
+  }
+
+  pub fn resize(&mut self, renderer: &Renderer) {
+    let old_size = uvec2(self.depth_texture.size().width, self.depth_texture.size().height);
+    let new_size = uvec2(renderer.size().width, renderer.size().height);
+    if old_size == new_size { return }
+    let depth_texture_desc = Self::desc(new_size);
+    self.depth_texture = renderer.device().create_texture(&depth_texture_desc);
+    self.depth_view = self.depth_texture.create_view(&wgpu::TextureViewDescriptor::default());
+  }
+}
+
+pub fn init_depth_texture(renderer: &Renderer) -> DepthTexture {
+  DepthTexture::init(renderer)
+}
+
+pub fn resize_depth_texture(
+  renderer: &Renderer,
+  depth_texture: &mut DepthTexture,
+) {
+  depth_texture.resize(renderer);
+}