Upstream bevy_color_blindness

Cargo.toml

@@ -28,6 +28,7 @@ default = [
   "animation",
   "bevy_asset",
   "bevy_audio",
+  "bevy_color_blindness",
   "bevy_gilrs",
   "bevy_scene",
   "bevy_winit",
@@ -57,6 +58,7 @@ render = [
 bevy_animation = ["bevy_internal/bevy_animation"]
 bevy_asset = ["bevy_internal/bevy_asset"]
 bevy_audio = ["bevy_internal/bevy_audio"]
+bevy_color_blindness = ["bevy_internal/bevy_color_blindness"]
 bevy_core_pipeline = ["bevy_internal/bevy_core_pipeline"]
 bevy_dynamic_plugin = ["bevy_internal/bevy_dynamic_plugin"]
 bevy_gilrs = ["bevy_internal/bevy_gilrs"]
@@ -484,6 +486,17 @@ description = "Showcases wireframe rendering"
 category = "3D Rendering"
 wasm = true
 
+# Accessibility
+[[example]]
+name = "color_blindness_simulation"
+path = "examples/accessibility/color_blindness_simulation.rs"
+
+[package.metadata.example.color_blindness_simulation]
+name = "Color Blindness Simulation"
+description = "Modify your app's rendering output to simulate color blindness"
+category = "Accessibility"
+wasm = true
+
 # Animation
 [[example]]
 name = "animated_fox"

crates/bevy_color_blindness/Cargo.toml

@@ -0,0 +1,28 @@
+[package]
+name = "bevy_color_blindness"
+version = "0.9.0-dev"
+edition = "2021"
+description = "Provides color blindness simulation for Bevy Engine"
+homepage = "https://bevyengine.org"
+repository = "https://github.com/bevyengine/bevy"
+license = "MIT OR Apache-2.0"
+keywords = ["bevy"]
+
+[dependencies]
+# bevy
+bevy_app = { path = "../bevy_app", version = "0.9.0-dev" }
+bevy_asset = { path = "../bevy_asset", version = "0.9.0-dev" }
+bevy_core_pipeline = { path = "../bevy_core_pipeline", version = "0.9.0-dev" }
+bevy_ecs = { path = "../bevy_ecs", version = "0.9.0-dev" }
+bevy_math = { path = "../bevy_math", version = "0.9.0-dev" }
+bevy_reflect = { path = "../bevy_reflect", version = "0.9.0-dev", features = [
+    "bevy",
+] }
+bevy_render = { path = "../bevy_render", version = "0.9.0-dev" }
+bevy_sprite = { path = "../bevy_sprite", version = "0.9.0-dev" }
+bevy_transform = { path = "../bevy_transform", version = "0.9.0-dev" }
+bevy_ui = { path = "../bevy_ui", version = "0.9.0-dev" }
+bevy_window = { path = "../bevy_window", version = "0.9.0-dev" }
+
+[dev-dependencies]
+bevy_input = { path = "../bevy_input", version = "0.9.0-dev" }

crates/bevy_color_blindness/src/color_blindness.wgsl

@@ -0,0 +1,34 @@
+#import bevy_pbr::mesh_view_bindings
+
+struct Percentages {
+    red: vec3<f32>,
+    green: vec3<f32>,
+    blue: vec3<f32>,
+};
+
+@group(1) @binding(0)
+var texture: texture_2d<f32>;
+
+@group(1) @binding(1)
+var our_sampler: sampler;
+
+@group(1) @binding(2)
+var<uniform> p: Percentages;
+
+@fragment
+fn fragment(
+    @builtin(position) position: vec4<f32>,
+    #import bevy_sprite::mesh2d_vertex_output
+) -> @location(0) vec4<f32> {
+    // Get screen position with coordinates from 0 to 1
+    let uv = position.xy / vec2<f32>(view.width, view.height);
+
+    var c = textureSample(texture, our_sampler, uv);
+
+    return vec4<f32>(
+        c.r * p.red.x + c.g * p.red.y + c.b * p.red.z,
+        c.r * p.green.x + c.g * p.green.y + c.b * p.green.z,
+        c.r * p.blue.x + c.g * p.blue.y + c.b * p.blue.z,
+        c.a
+    );
+}