Merge pull request 'Added HDR Support (pipeline specialization)' (#4) from 3-add-hdr-support into master

Reviewed-on: #4

.cargo/config.toml

@@ -0,0 +1,2 @@
+[profile.dev.package."*"]
+opt-level = 2

.gitea/workflows/build.yaml

@@ -0,0 +1,25 @@
+name: Build
+on: [push]
+
+jobs:
+  Build:
+    env:
+      RUNNER_TOOL_CACHE: /toolcache
+    container: rust:alpine
+    steps:
+      - name: Install node
+        run: apk add nodejs gcc libc-dev pkgconf libx11-dev alsa-lib-dev eudev-dev tar
+      - name: Check out repository code
+        uses: actions/checkout@v4
+      - name: Restore cache
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            target/
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+      - name: Build
+        run: cargo build --release

.github/workflows/rust.yml

@@ -1,24 +0,0 @@
-name: Rust
-
-on:
-  push:
-    branches: [ "master" ]
-  pull_request:
-    branches: [ "master" ]
-
-env:
-  CARGO_TERM_COLOR: always
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v4
-    - name: Install Dependencies
-      run: sudo apt-get update; sudo apt-get install --no-install-recommends libasound2-dev libudev-dev
-    - name: Build
-      run: cargo build --verbose
-    - name: Run tests
-      run: cargo test --verbose

Cargo.toml

@@ -1,11 +1,12 @@
 [package]
 name = "bevy_outline_post_process"
-version = "0.3.1"
+version = "0.5.0"
 edition = "2021"
 description = "An adaptive outline post-processing effect for the Bevy game engine."
 license = "0BSD OR MIT OR Apache-2.0"
+repository = "https://git.soaos.dev/bevy_outline_post_process"
 
 [dependencies.bevy]
-version = "0.14"
+version = "0.15"
 default-features = false
-features = ["bevy_render", "bevy_asset", "bevy_core_pipeline"]
+features = ["bevy_render", "bevy_asset", "bevy_core_pipeline", "png"]

README.md

@@ -3,24 +3,22 @@
 [![Crates](https://img.shields.io/crates/v/bevy_outline_post_process)](https://crates.io/crates/bevy_outline_post_process)
 ![License](https://img.shields.io/badge/license-0BSD%2FMIT%2FApache-blue.svg)
 ![Tag](https://img.shields.io/github/v/tag/exvacuum/bevy_outline_post_process)
-![Build](https://img.shields.io/github/actions/workflow/status/exvacuum/bevy_outline_post_process/rust.yml)
 [![Docs](https://img.shields.io/docsrs/bevy_outline_post_process)](https://exvacuum.github.io/bevy_outline_post_process)
 
 A plugin for the [Bevy](https://bevyengine.org) engine which adds an outline post-processing effect. Optionally supports adaptive outlining, so darker areas are outlined in white rather than black, based on luminance.
 
-Note: This is a full-screen post process effect and cannot be enabled/disabled for specific objects.
-
 ## Screenshots
-![](./doc/screenshot.png)
-![](./doc/screenshot_smooth.png)
+![](https://git.exvacuum.dev/bevy_outline_post_process/plain/doc/screenshot.png)
+![](https://git.exvacuum.dev/bevy_outline_post_process/plain/doc/screenshot_smooth.png)
 Configuration Used:
 ```rs
-bevy_outline_post_process::components::OutlinePostProcessSettings::new(2.0, 0.0, false);
+bevy_outline_post_process::components::OutlinePostProcessSettings::new(2.0, LinearRgba::BLACK, 0.01, 0.01, 1.0);
 ```
 ## Compatibility
 
 | Crate Version | Bevy Version |
 |---            |---           |
+| 0.4-0.5       | 0.15         |
 | 0.3           | 0.14         |
 | 0.1-0.2       | 0.13         |
 
@@ -29,13 +27,13 @@ bevy_outline_post_process::components::OutlinePostProcessSettings::new(2.0, 0.0,
 ### crates.io
 ```toml
 [dependencies]
-bevy_outline_post_process = "0.3"
+bevy_outline_post_process = "0.5"
 ```
 
 ### Using git URL in Cargo.toml
 ```toml
 [dependencies.bevy_outline_post_process]
-git = "https://github.com/exvacuum/bevy_outline_post_process.git"
+git = "https://git.soaos.dev/bevy_outline_post_process"
 ```
 
 ## Usage
@@ -51,7 +49,6 @@ fn main() {
             DefaultPlugins,
             bevy_outline_post_process::OutlinePostProcessPlugin,
         ))
-        .insert_resource(Msaa::Off)
         .run();
 }
 ```
@@ -59,9 +56,8 @@ fn main() {
 When spawning a camera:
 ```rs
 commands.spawn((
-    // Camera3dBundle...
-    NormalPrepass,
-    bevy_outline_post_process::components::OutlinePostProcessSettings::new(2.0, 0.0, false);
+    // Camera3d...
+    bevy_outline_post_process::components::OutlinePostProcessSettings::default();
 ));
 ```
 

assets/shaders/outline_post_process.wgsl

@@ -2,47 +2,94 @@
 
 struct OutlinePostProcessSettings {
 	weight: f32,
-	threshold: f32,
-    adaptive: u32,
+    color: vec4<f32>,
+	normal_threshold: f32,
+	depth_threshold: f32,
+    adaptive_threshold: f32,
+    camera_near: f32,
 }
 
 @group(0) @binding(0) var screen_texture: texture_2d<f32>;
 @group(0) @binding(1) var screen_sampler: sampler;
 @group(0) @binding(2) var normal_texture: texture_2d<f32>;
 @group(0) @binding(3) var normal_sampler: sampler;
-@group(0) @binding(4) var<uniform> settings: OutlinePostProcessSettings;
+@group(0) @binding(4) var depth_texture: texture_depth_2d;
+@group(0) @binding(5) var depth_sampler: sampler;
+@group(0) @binding(6) var<uniform> settings: OutlinePostProcessSettings;
 
 @fragment
 fn fragment(
 	in: FullscreenVertexOutput
 ) -> @location(0) vec4<f32> {
     let screen_color = textureSample(screen_texture, screen_sampler, in.uv);
-    let outline_width = settings.weight / vec2f(textureDimensions(screen_texture)); 
+    let luma = (0.2126 * screen_color.r + 0.7152 * screen_color.g + 0.0722 * screen_color.b);
 
+    let outline_width = settings.weight / vec2f(textureDimensions(screen_texture)); 
     let uv_top = vec2f(in.uv.x, in.uv.y - outline_width.y);
+    let uv_bottom = vec2f(in.uv.x, in.uv.y + outline_width.y);
     let uv_right = vec2f(in.uv.x + outline_width.x, in.uv.y);
+    let uv_left = vec2f(in.uv.x - outline_width.x, in.uv.y);
     let uv_top_right = vec2f(in.uv.x + outline_width.x, in.uv.y - outline_width.y);
 
-    let normal = textureSample(normal_texture, normal_sampler, in.uv);
-    let normal_top = textureSample(normal_texture, normal_sampler, uv_top);
-    let normal_right = textureSample(normal_texture, normal_sampler, uv_right);
-    let normal_top_right = textureSample(normal_texture, normal_sampler, uv_top_right);
+    // NORMAL FACTOR {{{
+        let normal = textureSample(normal_texture, normal_sampler, in.uv).xyz;
+        let normal_top = textureSample(normal_texture, normal_sampler, uv_top).xyz;
+        let normal_right = textureSample(normal_texture, normal_sampler, uv_right).xyz;
+        let normal_top_right = textureSample(normal_texture, normal_sampler, uv_top_right).xyz;
 
-    let delta_top = abs(normal - normal_top);
-    let delta_right = abs(normal - normal_right);
-    let delta_top_right = abs(normal - normal_top_right);
+        let normal_delta_top = abs(normal - normal_top);
+        let normal_delta_right = abs(normal - normal_right);
+        let normal_delta_top_right = abs(normal - normal_top_right);
 
-    let delta_max = max(delta_top, max(delta_right, delta_top_right));
-    let delta_raw = max(delta_max.x, max(delta_max.y, delta_max.z));
+        let normal_top_sum = max(normal_delta_top.x, max(normal_delta_top.y, normal_delta_top.z));
+        let normal_right_sum = max(normal_delta_right.x, max(normal_delta_right.y, normal_delta_right.z));
+        let normal_top_right_sum = max(normal_delta_top_right.x, max(normal_delta_top_right.y, normal_delta_top_right.z));
 
-    // let delta_clipped = clamp((delta_raw * 2.0) - settings.threshold, 0.0, 1.0);
-    let show_outline = f32(delta_raw > settings.threshold);
+        var normal_difference = step(settings.normal_threshold, max(normal_top_sum, max(normal_right_sum, normal_top_right_sum)));
+        let normal_outline = normal_difference;
+    // }}}
 
-    var outline = vec4f(show_outline, show_outline, show_outline, 0.0);
-    let luma = (0.2126 * screen_color.r + 0.7152 * screen_color.g + 0.0722 * screen_color.b);
-    if settings.adaptive != 0 && luma < 0.5 {
+    // DEPTH FACTOR {{{
+        let depth_color = textureSample(depth_texture, depth_sampler, in.uv);
+        let depth_color_top = textureSample(depth_texture, depth_sampler, uv_top);
+        let depth_color_bottom = textureSample(depth_texture, depth_sampler, uv_bottom);
+        let depth_color_right = textureSample(depth_texture, depth_sampler, uv_right);
+        let depth_color_left = textureSample(depth_texture, depth_sampler, uv_left);
+
+        let depth = linearize_depth(depth_color);
+        let depth_top = linearize_depth(depth_color_top);
+        let depth_bottom = linearize_depth(depth_color_bottom);
+        let depth_right = linearize_depth(depth_color_right);
+        let depth_left = linearize_depth(depth_color_left);
+
+        var depth_delta = 0.0;
+        depth_delta = depth_delta + depth - depth_top;
+        depth_delta = depth_delta + depth - depth_bottom;
+        depth_delta = depth_delta + depth - depth_right;
+        depth_delta = depth_delta + depth - depth_left;
+
+        var depth_outline = step(settings.depth_threshold, depth_delta);
+        if depth_color == 0.0 {
+            depth_outline = 0.0;
+        }
+    // }}}
+    
+    var outline = saturate(depth_outline + normal_outline);
+    if (1.0 - luma) > settings.adaptive_threshold {
         outline = outline * -1;
     }
-
-    return screen_color - outline;
+    if (outline == 1.0) {
+        return settings.color;
+    }
+    if (outline == -1.0) {
+        return vec4(vec3(1.0) - settings.color.xyz, 1.0);
+    }
+	return screen_color; 
+}
+
+fn linearize_depth(depth: f32) -> f32 {
+    if depth == 0.0 {
+        return 0.0;
+    }
+    return settings.camera_near / depth;
 }

src/components.rs

@@ -1,28 +1,50 @@
 use bevy::{
+    core_pipeline::prepass::{DeferredPrepass, DepthPrepass, NormalPrepass},
     prelude::*,
-    render::{extract_component::ExtractComponent, render_resource::ShaderType},
+    render::{extract_component::ExtractComponent, render_resource::{CachedRenderPipelineId, ShaderType}},
 };
 
+/// Stores the cached pipeline ID for the post processing pass for this camera
+#[derive(Component, Deref, DerefMut)]
+pub struct OutlinePostProcessPipelineId(pub CachedRenderPipelineId);
+
 /// Component which, when inserted into an entity with a camera and normal prepass, enables an outline effect for that
 /// camera.
 #[derive(Component, ShaderType, ExtractComponent, PartialEq, Clone)]
+#[require(NormalPrepass, DepthPrepass, DeferredPrepass, Msaa(|| Msaa::Off))]
 pub struct OutlinePostProcessSettings {
     /// Weight of outlines in pixels.
     weight: f32,
+    /// Color of outlines.
+    color: LinearRgba,
     /// A threshold for normal differences, values below this threshold will not become outlines.
     /// Higher values will result in more outlines which may look better on smooth surfaces.
-    threshold: f32,
-    /// Whether to use adaptive outlines. White outlines will be drawn around darker objects, while black ones will be drawn around lighter ones.
-    adaptive: u32,
+    normal_threshold: f32,
+    /// A threshold for depth differences (in units), values below this threshold will not become outlines.
+    /// Higher values will result in more outlines which may look better on smooth surfaces.
+    depth_threshold: f32,
+    /// Luma threshold to invert outline color. A value of `1.0` means this feature is disabled.
+    adaptive_threshold: f32,
+    /// Near plane depth of camera, used for linearization of depth buffer values
+    pub(crate) camera_near: f32,
 }
 
 impl OutlinePostProcessSettings {
     /// Create a new instance with the given settings
-    pub fn new(weight: f32, threshold: f32, adaptive: bool) -> Self {
+    pub fn new(
+        weight: f32,
+        color: LinearRgba,
+        normal_threshold: f32,
+        depth_threshold: f32,
+        adaptive_threshold: f32,
+    ) -> Self {
         Self {
             weight,
-            threshold,
-            adaptive: adaptive as u32,
+            color,
+            normal_threshold,
+            depth_threshold,
+            adaptive_threshold,
+            camera_near: 0.0,
         }
     }
 }
@@ -31,8 +53,11 @@ impl Default for OutlinePostProcessSettings {
     fn default() -> Self {
         Self {
             weight: 1.0,
-            threshold: 0.0,
-            adaptive: 0
+            color: LinearRgba::BLACK,
+            normal_threshold: 0.01,
+            depth_threshold: 0.05,
+            adaptive_threshold: 1.0,
+            camera_near: 0.0,
         }
     }
 }

src/lib.rs

@@ -1,7 +1,7 @@
 #![warn(missing_docs)]
 
 //! A plugin for the Bevy game engine which provides an outline post-process effect. The effect
-//! makes use of a normal prepass to generate outlines where differences in the normal buffer
+//! makes use of a normal and depth prepass to generate outlines where significant differences in the values
 //! occur.
 
 use bevy::{
@@ -11,11 +11,15 @@ use bevy::{
     render::{
         extract_component::{ExtractComponentPlugin, UniformComponentPlugin},
         render_graph::{RenderGraphApp, ViewNodeRunner},
-        RenderApp,
+        render_resource::{PipelineCache, SpecializedRenderPipelines, TextureFormat},
+        view::{ExtractedView, ViewTarget},
+        Render, RenderApp, RenderSet,
     },
 };
 
+use components::{OutlinePostProcessPipelineId, OutlinePostProcessSettings};
 pub use nodes::OutlineRenderLabel;
+use resources::{OutlinePostProcessPipeline, OutlinePostProcessingPipelineKey};
 
 /// Components used by this plugin.
 pub mod components;
@@ -32,13 +36,19 @@ impl Plugin for OutlinePostProcessPlugin {
         app.add_plugins((
             UniformComponentPlugin::<components::OutlinePostProcessSettings>::default(),
             ExtractComponentPlugin::<components::OutlinePostProcessSettings>::default(),
-        ));
+        ))
+        .add_systems(Update, update_shader_clip_planes);
 
         let Some(render_app) = app.get_sub_app_mut(RenderApp) else {
             return;
         };
 
         render_app
+            .add_systems(
+                Render,
+                prepare_post_processing_pipelines.in_set(RenderSet::Prepare),
+            )
+            .init_resource::<SpecializedRenderPipelines<OutlinePostProcessPipeline>>()
             .add_render_graph_node::<ViewNodeRunner<nodes::OutlineRenderNode>>(
                 Core3d,
                 nodes::OutlineRenderLabel,
@@ -61,3 +71,41 @@ impl Plugin for OutlinePostProcessPlugin {
         render_app.init_resource::<resources::OutlinePostProcessPipeline>();
     }
 }
+
+fn prepare_post_processing_pipelines(
+    mut commands: Commands,
+    pipeline_cache: Res<PipelineCache>,
+    mut pipelines: ResMut<SpecializedRenderPipelines<OutlinePostProcessPipeline>>,
+    post_processing_pipeline: Res<OutlinePostProcessPipeline>,
+    views: Query<(Entity, &ExtractedView), With<OutlinePostProcessSettings>>,
+) {
+    for (entity, view) in views.iter() {
+        let pipeline_id = pipelines.specialize(
+            &pipeline_cache,
+            &post_processing_pipeline,
+            OutlinePostProcessingPipelineKey {
+                texture_format: if view.hdr {
+                    ViewTarget::TEXTURE_FORMAT_HDR
+                } else {
+                    TextureFormat::bevy_default()
+                },
+            },
+        );
+
+        commands
+            .entity(entity)
+            .insert(OutlinePostProcessPipelineId(pipeline_id));
+    }
+}
+
+fn update_shader_clip_planes(
+    mut settings_query: Query<(Ref<Projection>, &mut OutlinePostProcessSettings)>,
+) {
+    for (projection, mut settings) in settings_query.iter_mut() {
+        if projection.is_changed() {
+            if let Projection::Perspective(projection) = projection.into_inner() {
+                settings.camera_near = projection.near;
+            }
+        }
+    }
+}

src/nodes.rs

@@ -1,6 +1,6 @@
 use bevy::{
     core_pipeline::prepass::ViewPrepassTextures,
-    ecs::query::QueryItem,
+    ecs::{query::QueryItem, system::lifetimeless::Read},
     prelude::*,
     render::{
         extract_component::ComponentUniforms,
@@ -14,6 +14,8 @@ use bevy::{
     },
 };
 
+use crate::components::OutlinePostProcessPipelineId;
+
 use super::components;
 use super::resources;
 
@@ -26,21 +28,27 @@ pub struct OutlineRenderNode;
 
 impl ViewNode for OutlineRenderNode {
     type ViewQuery = (
-        &'static ViewTarget,
-        &'static ViewPrepassTextures,
-        &'static components::OutlinePostProcessSettings,
+        Read<ViewTarget>,
+        Read<ViewPrepassTextures>,
+        Read<OutlinePostProcessPipelineId>,
+        Read<components::OutlinePostProcessSettings>,
     );
 
     fn run(
         &self,
         _graph: &mut RenderGraphContext,
         render_context: &mut RenderContext,
-        (view_target, view_prepass_textures, _): QueryItem<Self::ViewQuery>,
+        (
+            view_target,
+            view_prepass_textures,
+            pipeline_id,
+            _,
+        ): QueryItem<Self::ViewQuery>,
         world: &World,
     ) -> Result<(), NodeRunError> {
         let render_pipeline = world.resource::<resources::OutlinePostProcessPipeline>();
         let pipeline_cache = world.resource::<PipelineCache>();
-        let Some(pipeline) = pipeline_cache.get_render_pipeline(render_pipeline.pipeline_id) else {
+        let Some(pipeline) = pipeline_cache.get_render_pipeline(**pipeline_id) else {
             warn!("Failed to get render pipeline from cache, skipping...");
             return Ok(());
         };
@@ -57,6 +65,11 @@ impl ViewNode for OutlineRenderNode {
             return Ok(());
         };
 
+        let Some(depth_buffer_view) = view_prepass_textures.depth_view() else {
+            error!("Failed to get normal buffer view");
+            return Ok(());
+        };
+
         let post_process = view_target.post_process_write();
 
         let bind_group = render_context.render_device().create_bind_group(
@@ -67,6 +80,8 @@ impl ViewNode for OutlineRenderNode {
                 &render_pipeline.screen_sampler,
                 normal_buffer_view,
                 &render_pipeline.normal_sampler,
+                depth_buffer_view,
+                &render_pipeline.depth_sampler,
                 uniform_binding,
             )),
         );

src/resources.rs

@@ -1,16 +1,11 @@
 use bevy::{
-    core_pipeline::fullscreen_vertex_shader::fullscreen_shader_vertex_state,
+    core_pipeline::fullscreen_vertex_shader,
     prelude::*,
     render::{
         render_resource::{
-            binding_types::{sampler, texture_2d, uniform_buffer},
-            BindGroupLayout, BindGroupLayoutEntries, CachedRenderPipelineId, ColorTargetState,
-            ColorWrites, FragmentState, MultisampleState, PipelineCache, PrimitiveState,
-            RenderPipelineDescriptor, Sampler, SamplerBindingType, SamplerDescriptor, ShaderStages,
-            TextureFormat, TextureSampleType,
+            binding_types::{sampler, texture_2d, uniform_buffer}, BindGroupLayout, BindGroupLayoutEntries, ColorTargetState, ColorWrites, FragmentState, RenderPipelineDescriptor, Sampler, SamplerBindingType, SamplerDescriptor, ShaderStages, SpecializedRenderPipeline, TextureFormat, TextureSampleType
         },
         renderer::RenderDevice,
-        texture::BevyDefault,
     },
 };
 
@@ -21,7 +16,8 @@ pub struct OutlinePostProcessPipeline {
     pub layout: BindGroupLayout,
     pub screen_sampler: Sampler,
     pub normal_sampler: Sampler,
-    pub pipeline_id: CachedRenderPipelineId,
+    pub depth_sampler: Sampler,
+    pub shader: Handle<Shader>,
 }
 
 impl FromWorld for OutlinePostProcessPipeline {
@@ -37,6 +33,8 @@ impl FromWorld for OutlinePostProcessPipeline {
                     sampler(SamplerBindingType::Filtering),
                     texture_2d(TextureSampleType::Float { filterable: true }),
                     sampler(SamplerBindingType::Filtering),
+                    texture_2d(TextureSampleType::Depth),
+                    sampler(SamplerBindingType::NonFiltering),
                     uniform_buffer::<components::OutlinePostProcessSettings>(false),
                 ),
             ),
@@ -44,39 +42,53 @@ impl FromWorld for OutlinePostProcessPipeline {
 
         let screen_sampler = render_device.create_sampler(&SamplerDescriptor::default());
         let normal_sampler = render_device.create_sampler(&SamplerDescriptor::default());
+        let depth_sampler = render_device.create_sampler(&SamplerDescriptor::default());
 
         let shader = world.resource::<AssetServer>().load::<Shader>(
             "embedded://bevy_outline_post_process/../assets/shaders/outline_post_process.wgsl",
         );
 
-        let pipeline_id =
-            world
-                .resource_mut::<PipelineCache>()
-                .queue_render_pipeline(RenderPipelineDescriptor {
-                    label: Some("outline_post_process_render_pipeline".into()),
-                    layout: vec![layout.clone()],
-                    push_constant_ranges: vec![],
-                    vertex: fullscreen_shader_vertex_state(),
-                    primitive: PrimitiveState::default(),
-                    depth_stencil: None,
-                    multisample: MultisampleState::default(),
-                    fragment: Some(FragmentState {
-                        shader,
-                        shader_defs: vec![],
-                        entry_point: "fragment".into(),
-                        targets: vec![Some(ColorTargetState {
-                            format: TextureFormat::bevy_default(),
-                            blend: None,
-                            write_mask: ColorWrites::ALL,
-                        })],
-                    }),
-                });
-
         Self {
             layout,
             screen_sampler,
             normal_sampler,
-            pipeline_id,
+            depth_sampler,
+            shader,
         }
     }
 }
+
+/// A key that uniquely identifies a built-in postprocessing pipeline.
+#[derive(Clone, Copy, PartialEq, Eq, Hash)]
+pub struct OutlinePostProcessingPipelineKey {
+    /// The format of the source and destination textures.
+    pub texture_format: TextureFormat,
+}
+
+impl SpecializedRenderPipeline for OutlinePostProcessPipeline {
+    type Key = OutlinePostProcessingPipelineKey;
+    
+    fn specialize(&self, key: Self::Key) -> RenderPipelineDescriptor {
+        RenderPipelineDescriptor {
+            label: Some("outline_post_processing".into()),
+            layout: vec![self.layout.clone()],
+            vertex: fullscreen_vertex_shader::fullscreen_shader_vertex_state(),
+            fragment: Some(FragmentState {
+                shader: self.shader.clone(),
+                shader_defs: vec![],
+                entry_point: "fragment".into(),
+                targets: vec![Some(ColorTargetState {
+                    format: key.texture_format,
+                    blend: None,
+                    write_mask: ColorWrites::ALL,
+                })],
+            }),
+            primitive: default(),
+            depth_stencil: None,
+            multisample: default(),
+            push_constant_ranges: vec![],
+            zero_initialize_workgroup_memory: false,
+        }
+    }
+    
+}