From bd7efce600f50c015d3cfef05b7e8c5fc5b771eb Mon Sep 17 00:00:00 2001
From: 3dtours <yeunhiepanh.photo@gmail.com>
Date: Wed, 9 Sep 2026 11:32:30 +0700
Subject: [PATCH] feat(presets): add LEICA simulation chip; collapse recipe
 strip on sim select

---
 src/components/AdjustmentPanel.tsx |  8 +++++++-
 src/types/index.ts                 |  2 +-
 src/utils/colorUtils.ts            | 16 ++++++++++++++++
 src/utils/defaultRecipes.ts        |  5 +++++
 4 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/src/components/AdjustmentPanel.tsx b/src/components/AdjustmentPanel.tsx
index 46987b0..2238f0d 100644
--- a/src/components/AdjustmentPanel.tsx
+++ b/src/components/AdjustmentPanel.tsx
@@ -302,7 +302,13 @@ export default function AdjustmentPanel({
             key: s.id,
             label: s.name,
             active: currentRecipeId === s.id,
-            onPress: () => onSelectRecipe(filmSimToRecipe(s)),
+            // Choosing a simulation is a deliberate switch away from the saved
+            // recipes: collapse the RECIPES strip above so it never lingers
+            // over the freshly-applied sim.
+            onPress: () => {
+              setShowRecipes(false);
+              onSelectRecipe(filmSimToRecipe(s));
+            },
           })),
           {
             key: 'recipes-toggle',
diff --git a/src/types/index.ts b/src/types/index.ts
index bb45ebf..9dee659 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -34,7 +34,7 @@ export const ASPECT_RATIO_W_H: Record<Exclude<AspectRatio, 'full'>, number> = {
 // cool tint in shade, plus a seasonal atmospheric haze/fog veil.
 export type CinemaSeason = 'spring' | 'summer' | 'autumn' | 'winter';
 
-export type BaseFilter = 'classic-neg' | 'classic-chrome' | 'provia' | 'velvia' | 'astia' | 'eterna' | 'monochrome' | 'none';
+export type BaseFilter = 'classic-neg' | 'classic-chrome' | 'provia' | 'velvia' | 'astia' | 'eterna' | 'monochrome' | 'leica' | 'none';
 
 export interface ColorAdjustments {
   exposure: number; // -10 to +10 (mapped to matrix multiplier or offset)
diff --git a/src/utils/colorUtils.ts b/src/utils/colorUtils.ts
index 05c1778..754fc4d 100644
--- a/src/utils/colorUtils.ts
+++ b/src/utils/colorUtils.ts
@@ -98,6 +98,22 @@ export function getSkiaColorMatrix(baseFilter: BaseFilter, adj: ColorAdjustments
       0.02, 0.02, 0.94, 0, 0.02,
       0, 0, 0, 1, 0,
     ];
+  } else if (baseFilter === 'leica') {
+    // Leica digital look (M/Q/SL): neutral-but-warm, deep yet open shadows,
+    // restrained saturation with deep reds and true greens — never the punchy
+    // chroma of Velvia or the amber of Classic Neg. A linear matrix cannot do
+    // the smooth highlight rolloff (that's the tone shader's job), so this only
+    // carries the mild contrast/warmth/colour balance half:
+    //   - gentle contrast around mid-grey (deep blacks, no lifted blacks)
+    //   - slight warm cast in highlights (R up, B down), near-neutral white
+    //   - reds a touch deeper, blues slightly muted towards natural skies
+    //   - green mostly untouched (Leica greens stay true, not olive)
+    matrix = [
+      1.08, -0.02, -0.01, 0, -0.025,
+      -0.015, 1.06, -0.01, 0, -0.017,
+      -0.02, -0.015, 1.04, 0, -0.013,
+      0, 0, 0, 1, 0,
+    ];
   } else if (baseFilter === 'monochrome') {
     // Acros Monochrome: ITU-R BT.709 luma — pure grayscale, zero color leakage
     const r = 0.2126;
diff --git a/src/utils/defaultRecipes.ts b/src/utils/defaultRecipes.ts
index dc71004..19458ff 100644
--- a/src/utils/defaultRecipes.ts
+++ b/src/utils/defaultRecipes.ts
@@ -43,6 +43,11 @@ export const FILM_SIMS: FilmSim[] = [
   { id: 'sim-astia', name: 'ASTIA', baseFilter: 'astia', adjustments: { ...DEFAULT_ADJUSTMENTS } },
   { id: 'sim-eterna', name: 'ETERNA', baseFilter: 'eterna', adjustments: { ...DEFAULT_ADJUSTMENTS } },
   { id: 'sim-acros', name: 'ACROS', baseFilter: 'monochrome', adjustments: { ...DEFAULT_ADJUSTMENTS } },
+  // Leica digital look (M/Q/SL) is NOT a film stock: neutral-but-warm colour
+  // with restrained saturation, deep open shadows and gentle highlight rolloff.
+  // Matrix-only here (like every sim) — the tonal half lives in the leica
+  // matrix (mild contrast + warm neutrality); users stack DR/tone on top.
+  { id: 'sim-leica', name: 'LEICA', baseFilter: 'leica', adjustments: { ...DEFAULT_ADJUSTMENTS } },
 ];
 
 // Film sim → full Recipe (never persisted; sims are applied on the fly).