Add gegl:stereographic-projection.

source/gegl/exports.ts

@@ -5,3 +5,4 @@ export * from './mirrors.js';
 export * from './newsprint.js';
 export * from './simplex-noise.js';
 export * from './softglow.js';
+export * from './stereographic-projection.js';

source/gegl/stereographic-projection.ts

@@ -0,0 +1,36 @@
+import {BaseOperation} from './base.js';
+
+export interface StereographicProjectionParameters {
+  height: number;
+  inverse: boolean;
+  pan: number;
+  samplerType: 'nearest' | 'linear' | 'cubic' | 'nohalo' | 'lohalo';
+  spin: number;
+  tilt: number;
+  width: number;
+  zoom: number;
+}
+
+export class StereographicProjection extends BaseOperation<StereographicProjectionParameters> {
+  public static default: StereographicProjectionParameters = {
+    height: -1,
+    inverse: false,
+    pan: 0,
+    samplerType: 'nearest',
+    spin: 0,
+    tilt: 90,
+    width: -1,
+    zoom: 100,
+  };
+
+  public get default() {
+    return StereographicProjection.default;
+  }
+
+  public appendCrop = false;
+  public name = 'gegl:stereographic-projection';
+
+  constructor(parameters?: Partial<StereographicProjectionParameters>) {
+    super({...StereographicProjection.default, ...parameters});
+  }
+}