fix setModified() so that OpenGL updates properly (#1786)

core/src/processing/core/PGraphicsJava2D.java

@@ -359,7 +359,10 @@ public class PGraphicsJava2D extends PGraphics /*PGraphics2D*/ {
 //    // full copy of the pixels to the surface in this.updatePixels().
 //    setModified();
 //    super.updatePixels();
-    setModified();  // marks pixels as modified so that the pixels will be updated
+
+    // Marks pixels as modified so that the pixels will be updated.
+    // Also sets mx1/y1/x2/y2 so that OpenGL will pick it up.
+    setModified();
   }
 
 

core/src/processing/core/PImage.java

@@ -416,6 +416,10 @@ public class PImage implements PConstants, Cloneable {
 
   public void setModified() {  // ignore
     modified = true;
+    mx1 = 0;
+    my1 = 0;
+    mx2 = width;
+    my2 = height;
   }
 
 

core/todo.txt

@@ -9,6 +9,8 @@ X .png data written when .jpg file specified with save/saveFrame()
 X   https://github.com/processing/processing/issues/1810
 X remove() broken in the List classes
 X   https://github.com/processing/processing/issues/1826
+X Java2D surfaces not updating when used with OpenGL
+X   https://github.com/processing/processing/issues/1786
 
 andres
 A PImage not drawn after resize()/get() in P2D/P3D