Add contrast, brightnedd, saturation, gamma to/from Json (#495)

Author: strausr

__TESTS__/unit/fromJson/adjust.fromJson.test.ts

@@ -5,13 +5,19 @@ describe('adjust.fromJson', () => {
     const transformation = fromJson([
       { actionType: 'improve', mode: 'outdoor', blend: 30},
       { actionType: 'unsharpMask', strength: 50},
-      { actionType: 'saturation', level: 40}
+      { actionType: 'saturation', level: 40},
+      {actionType: 'contrast', level: 40},
+      {actionType: 'brightness', level: 30},
+      {actionType: 'gamma', level: 30}
     ]);
 
     expect(transformation.toString()).toStrictEqual([
       'e_improve:outdoor:30',
       'e_unsharp_mask:50',
-      'e_saturation:40'
+      'e_saturation:40',
+      'e_contrast:40',
+      'e_brightness:30',
+      'e_gamma:30'
     ].join('/'));
   });
 });

__TESTS__/unit/toJson/adjust.toJson.test.ts

@@ -35,4 +35,37 @@ describe('Adjust toJson()', () => {
       }
     ]);
   });
+
+  it('adjust.contrast', () => {
+    const transformation = new Transformation()
+      .addAction(Adjust.contrast().level(50));
+    expect(transformation.toJson()).toStrictEqual( [
+      {
+        actionType: 'contrast',
+        level: 50
+      }
+    ]);
+  });
+
+  it('adjust.brightness', () => {
+    const transformation = new Transformation()
+      .addAction(Adjust.brightness().level(40));
+    expect(transformation.toJson()).toStrictEqual( [
+      {
+        actionType: 'brightness',
+        level: 40
+      }
+    ]);
+  });
+
+  it('adjust.gamma', () => {
+    const transformation = new Transformation()
+      .addAction(Adjust.gamma().level(40));
+    expect(transformation.toJson()).toStrictEqual( [
+      {
+        actionType: 'gamma',
+        level: 40
+      }
+    ]);
+  });
 });

src/internal/fromJson.ts

@@ -87,7 +87,10 @@ const ActionModelMap: Record<string, IHasFromJson> = {
   improve: ImproveAction,
   unsharpMask: EffectActionWithStrength,
   saturation: EffectActionWithLevel,
-  dpr: DeliveryDPRAction
+  dpr: DeliveryDPRAction,
+  contrast: EffectActionWithLevel,
+  brightness: EffectActionWithLevel,
+  gamma: EffectActionWithLevel
 };
 
 /**