Fix createFilterShader context

Author: davepagurek

src/webgl/material.js

@@ -673,9 +673,9 @@ function material(p5, fn){
     let vertSrc = fragSrc.includes('#version 300 es') ? defaultVertV2 : defaultVertV1;
     const shader = new Shader(this._renderer, vertSrc, fragSrc);
     if (this._renderer.GL) {
-      shader.ensureCompiledOnContext(this);
+      shader.ensureCompiledOnContext(this._renderer);
     } else {
-      shader.ensureCompiledOnContext(this._renderer.getFilterGraphicsLayer());
+      shader.ensureCompiledOnContext(this._renderer.getFilterGraphicsLayer()._renderer);
     }
     return shader;
   };

test/unit/webgl/p5.RendererGL.js

@@ -2506,10 +2506,10 @@ suite('p5.RendererGL', function() {
   });
 
   suite('vertexProperty()', function() {
-    test('Immediate mode data and buffers created in beginShape', 
+    test('Immediate mode data and buffers created in beginShape',
       function() {
         myp5.createCanvas(50, 50, myp5.WEBGL);
-        
+
         myp5.beginShape();
         myp5.vertexProperty('aCustom', 1);
         myp5.vertexProperty('aCustomVec3', [1, 2, 3]);
@@ -2543,10 +2543,10 @@ suite('p5.RendererGL', function() {
         myp5.endShape();
       }
     );
-    test('Immediate mode data and buffers deleted after beginShape', 
+    test('Immediate mode data and buffers deleted after beginShape',
       function() {
         myp5.createCanvas(50, 50, myp5.WEBGL);
-        
+
         myp5.beginShape();
         myp5.vertexProperty('aCustom', 1);
         myp5.vertexProperty('aCustomVec3', [1,2,3]);