Chore: PixelateFilter backward-compatibility (#431)

Co-authored-by: Baz Utsahajit <[email protected]>

src/pixelate/PixelateFilter.ts

@@ -1,4 +1,4 @@
-import { Filter, GlProgram, GpuProgram, Point, UniformGroup } from 'pixi.js';
+import { Filter, GlProgram, GpuProgram, Point } from 'pixi.js';
 import { vertex, wgslVertex } from '../defaults';
 import fragment from './pixelate.frag';
 import source from './pixelate.wgsl';
@@ -15,20 +15,11 @@ type Size = number | number[] | Point;
  */
 export class PixelateFilter extends Filter
 {
-    /** Default values for options. */
-    public static readonly DEFAULT_SIZE: Size = 10;
-
     /**
      * @param {Point|Array<number>|number} [size=10] - Either the width/height of the size of the pixels, or square size
      */
-    constructor(size: Size)
+    constructor(size: Size = 10)
     {
-        size = size ?? PixelateFilter.DEFAULT_SIZE;
-
-        const pixelateUniforms = new UniformGroup({
-            uSize: { value: new Float32Array(2), type: 'vec2<f32>' },
-        });
-
         const gpuProgram = GpuProgram.from({
             vertex: {
                 source: wgslVertex,
@@ -50,7 +41,9 @@ export class PixelateFilter extends Filter
             gpuProgram,
             glProgram,
             resources: {
-                pixelateUniforms,
+                pixelateUniforms: {
+                    uSize: { value: new Float32Array(2), type: 'vec2<f32>' },
+                },
             },
         });