Add gegl:focus-blur.

source/gegl/exports.ts

@@ -1,5 +1,6 @@
 export * from './base.js';
 export * from './crop.js';
+export * from './focus-blur.js';
 export * from './generic.js';
 export * from './mirrors.js';
 export * from './newsprint.js';

source/gegl/focus-blur.ts

@@ -0,0 +1,48 @@
+import {BaseOperation} from './base.js';
+
+export interface FocusBlurParameters {
+  aspectRatio: number;
+  blurRadius: number;
+  blurType: 'gaussian' | 'lens';
+  focus: number;
+  highlightFactor: number;
+  highlightThresholdHigh: number;
+  highlightThresholdLow: number;
+  highQuality: boolean;
+  midpoint: number;
+  radius: number;
+  rotation: number;
+  shape: 'circle' | 'square' | 'diamond' | 'horizontal' | 'vertical';
+  x: number;
+  y: number;
+}
+
+export class FocusBlur extends BaseOperation<FocusBlurParameters> {
+  public static default: FocusBlurParameters = {
+    aspectRatio: 0,
+    blurRadius: 25,
+    blurType: 'gaussian',
+    focus: 0.25,
+    highlightFactor: 0,
+    highlightThresholdHigh: 1,
+    highlightThresholdLow: 0,
+    highQuality: false,
+    midpoint: 0.5,
+    radius: 0.75,
+    rotation: 0,
+    shape: 'circle',
+    x: 0.5,
+    y: 0.5,
+  };
+
+  public get default() {
+    return FocusBlur.default;
+  }
+
+  public appendCrop = false;
+  public name = 'gegl:focus-blur';
+
+  constructor(parameters?: Partial<FocusBlurParameters>) {
+    super({...FocusBlur.default, ...parameters});
+  }
+}