Fix infinite update loop

If the input buffer is null, the next assignment results in a change event on the same resource that is currently being updated because BloomEffect shares its input buffer resource with its subpasses.

Author: vanruesc

src/effects/BloomEffect.ts

@@ -143,6 +143,16 @@ export class BloomEffect extends Effect {
 
 	protected override onInputChange(): void {
 
+		if(this.input.defaultBuffer === null) {
+
+			// Discard the texture resources.
+			this.luminancePass.input.removeDefaultBuffer();
+			this.mipmapBlurPass.input.removeDefaultBuffer();
+
+			return;
+
+		}
+
 		if(this.luminancePass.enabled) {
 
 			this.luminancePass.input.defaultBuffer = this.input.defaultBuffer;