Expose drawingContext to global mode

Author: limzykenneth

src/core/main.js

@@ -190,6 +190,10 @@ class p5 {
     return this._renderer.pixels;
   }
 
+  get drawingContext(){
+    return this._renderer.drawingContext;
+  }
+
   static registerAddon(addon) {
     const lifecycles = {};
     addon(p5, p5.prototype, lifecycles);

src/core/p5.Renderer2D.js

@@ -68,9 +68,6 @@ class Renderer2D extends Renderer {
     if(attributes.colorSpace === 'display-p3'){
       this.states.colorMode = RGBHDR;
     }
-    if (isMainCanvas) {
-      this._pInst.drawingContext = this.drawingContext;
-    }
     this.scale(this._pixelDensity, this._pixelDensity);
 
     if(!this.filterRenderer){

src/webgl/p5.RendererGL.js

@@ -123,9 +123,6 @@ class RendererGL extends Renderer {
     // This redundant property is useful in reminding you that you are
     // interacting with WebGLRenderingContext, still worth considering future removal
     this.GL = this.drawingContext;
-    if (isMainCanvas) {
-      this._pInst.drawingContext = this.drawingContext;
-    }
 
     if (this._isMainCanvas) {
       // for pixel method sharing with pimage