fixes for SCREEN_SPACE text and avoiding infinite loop in printMatrix

processing/core/PFont.java

@@ -530,6 +530,8 @@ public class PFont implements PConstants {
       */
 
     } else {  // SCREEN_SPACE
+      parent.loadPixels();
+
       int xx = (int) x + leftExtent[glyph];;
       int yy = (int) y - topExtent[glyph];
 
@@ -583,6 +585,7 @@ public class PFont implements PConstants {
              (( a1 * fb + a2 * ( p2        & 0xff)) >> 8));
         }
       }
+      parent.updatePixels();
     }
   }