Working on adding custom renderer support

Author: kiwistrongis

core/src/processing/core/PApplet.java

@@ -467,11 +467,25 @@ public void onCreate(Bundle savedInstanceState) {
     int sw = sketchWidth();
     int sh = sketchHeight();
 
-    if (sketchRenderer().equals(JAVA2D)) {
-      surfaceView = new SketchSurfaceView(this, sw, sh);
-    } else if (sketchRenderer().equals(P2D) || sketchRenderer().equals(P3D)) {
-      surfaceView = new SketchSurfaceViewGL(this, sw, sh, sketchRenderer().equals(P3D));
-    }
+    String renderer_name = sketchRenderer();
+    Class<?> renderer_class = null;
+    try{
+      renderer_class = Class.forName( renderer_name);}
+    catch( ClassNotFoundException exception){
+      //what to throw here?
+      throw new RuntimeException(
+        "Error: Could not resolve renderer class name", exception);}
+
+    if( renderer_name.equals( JAVA2D))
+      surfaceView = new SketchSurfaceView( this, sw, sh);
+    else if( PGraphicsOpenGL.class.isAssignableFrom( renderer_class))
+      surfaceView = new SketchSurfaceViewGL( this, sw, sh,
+        (Class<? extends PGraphicsOpenGL>) renderer_class);
+    else throw new RuntimeException(
+      String.format(
+        "Error: Unsupported renderer class: %s",
+        renderer_name));
+
 //    g = ((SketchSurfaceView) surfaceView).getGraphics();
 
 //    surfaceView.setLayoutParams(new LayoutParams(sketchWidth(), sketchHeight()));
@@ -784,7 +798,9 @@ public class SketchSurfaceViewGL extends GLSurfaceView /*implements SketchSurfac
     SurfaceHolder surfaceHolder;
 
 
-    public SketchSurfaceViewGL(Context context, int wide, int high, boolean is3D) {
+    public SketchSurfaceViewGL(
+        Context context, int wide, int high,
+        Class<? extends PGraphicsOpenGL> renderer_class){
       super(context);
 
       // Check if the system supports OpenGL ES 2.0.
@@ -805,11 +821,24 @@ public SketchSurfaceViewGL(Context context, int wide, int high, boolean is3D) {
       // null. This is required because PApplet.onResume events (which call
       // this.onResume() and thus require a valid renderer) are triggered
       // before surfaceChanged() is ever called.
-      if (is3D) {
-        g3 = new PGraphics3D();
-      } else {
+
+      if( renderer_class.equals( PGraphics2D.class))
         g3 = new PGraphics2D();
-      }
+      else if( renderer_class.equals( PGraphics3D.class))
+        g3 = new PGraphics3D();
+      else
+        try{
+          //dang java generics
+          Constructor<? extends PGraphicsOpenGL> constructor =
+            renderer_class.getConstructor();
+          g3 = constructor.newInstance();}
+        catch( Exception exception){
+          throw new RuntimeException(
+            "Error: Failed to initialize custom OpenGL renderer",
+            exception);}
+
+
+      //set it up
       g3.setParent(PApplet.this);
       g3.setPrimary(true);
       // Set semi-arbitrary size; will be set properly when surfaceChanged() called