Add demo for backdrop blur filter

examples/src/DemoApplication.mjs

@@ -71,6 +71,7 @@ export default class DemoApplication extends PIXI.Application
             height: this.initHeight,
             autoStart: false,
             preference,
+            useBackBuffer: true,
         });
     }
 

examples/src/filters/backdropBlur.mjs

@@ -0,0 +1,11 @@
+export default function ()
+{
+    this.addFilter('BackdropBlurFilter', {
+        fishOnly: true,
+        oncreate(folder)
+        {
+            folder.add(this, 'blur', 0, 100);
+            folder.add(this, 'quality', 1, 10);
+        },
+    });
+}

examples/src/filters/index.mjs

@@ -4,6 +4,7 @@ export { default as adjustment } from './adjustment.mjs';
 export { default as advancedBloom } from './advanced-bloom.mjs';
 export { default as alpha } from './alpha.mjs';
 export { default as ascii } from './ascii.mjs';
+export { default as backdropBlur } from './backdropBlur.mjs';
 export { default as bevel } from './bevel.mjs';
 export { default as bloom } from './bloom.mjs';
 export { default as blur } from './blur.mjs';