HDR

lib/examples/demo.rs

@@ -16,6 +16,10 @@
 //!     (`create_mesh_with_lod`, auto-decimated by halving targets); the CPU picks each entity's
 //!     level from its projected screen size (with hysteresis) — zoom in/out with the wheel and
 //!     the sphere/cylinder/cone/torus visibly lose detail as they shrink on screen.
+//!   * **HDR + Tone Mapping** (Étape 20): the demo enables ACES Filmic tone mapping via
+//!     `AppBuilder::with_hdr(ToneMapper::Aces)`. The main pass renders to an offscreen
+//!     `Rgba16Float` texture, then a fullscreen TM pass compresses it to [0,1] and writes
+//!     to the sRGB surface — highlights are softly rolled off instead of clipping to white.
 //!
 //! Doc (this header) follows the English convention used for examples; internal comments stay
 //! concise and French where helpful. Run with:
@@ -27,6 +31,7 @@ use winit::event::MouseButton;
 use winit::keyboard::KeyCode;
 use wsg_lib::AppHandler;
 use wsg_lib::app::AppBuilder;
+use wsg_lib::core::ToneMapper;
 use wsg_lib::math::{Transform, cone, cube, cylinder, icosphere, plane, torus, uv_sphere};
 use wsg_lib::resources::{CameraController, Texture};
 use wsg_lib::utils::WsgError;
@@ -269,9 +274,12 @@ impl AppHandler for Demo {
 #[pollster::main]
 async fn main() -> Result<(), WsgError> {
     // Culling enabled here (Step 15, D8) to exercise the GPU path; it is OFF by default elsewhere.
+    // HDR + ACES tone mapping (Étape 20): renders to an offscreen Rgba16Float texture, then
+    // tone-maps to the sRGB surface. Without `.with_hdr(...)`, the demo would be LDR direct.
     let app = AppBuilder::new()
         .title("WSG Demo")
         .with_culling(true)
+        .with_hdr(ToneMapper::Aces)
         .build()
         .await?;
     app.run(Demo {