make some utility functions protected, removed a few others that are not

used.

core/src/processing/core/PGraphics.java

@@ -3671,11 +3671,6 @@ public class PGraphics extends PImage implements PConstants {
   }
 
 
-  public Object initCache(PImage img) { // ignore
-    return null;
-  }
-
-
   //////////////////////////////////////////////////////////////
 
   // SHAPE

core/src/processing/core/PImage.java

@@ -474,26 +474,6 @@ public class PImage implements PConstants, Cloneable {
       pixels = new int[width*height];
     }
     isLoaded();
-
-/*
-    if (parent != null) {
-      Object cache = parent.g.initCache(this);
-      if (cache != null) {
-        Method loadPixelsMethod = null;
-        try {
-          loadPixelsMethod = cache.getClass().getMethod("loadPixels", new Class[] { int[].class });
-        } catch (Exception e) { }
-
-        if (loadPixelsMethod != null) {
-          try {
-            loadPixelsMethod.invoke(cache, new Object[] { pixels });
-          } catch (Exception e) {
-            e.printStackTrace();
-          }
-        }
-      }
-    }
-*/
   }
 
 
@@ -3132,7 +3112,7 @@ public class PImage implements PConstants, Cloneable {
       ImageWriter writer = null;
       ImageWriteParam param = null;
       IIOMetadata metadata = null;
-      
+
       if (extension.equals("jpg") || extension.equals("jpeg")) {
         if ((writer = imageioWriter("jpeg")) != null) {
           // Set JPEG quality to 90% with baseline optimization. Setting this

core/src/processing/opengl/PGraphicsOpenGL.java

@@ -5362,25 +5362,6 @@ public class PGraphicsOpenGL extends PGraphics {
   }
 
 
-  public void drawTexture(int target, int id, int width, int height,
-                          int X0, int Y0, int X1, int Y1) {
-    beginPGL();
-    pgl.drawTexture(target, id, width, height, X0, Y0, X1, Y1);
-    endPGL();
-  }
-
-
-  public void drawTexture(int target, int id, int texW, int texH,
-                          int texX0, int texY0, int texX1, int texY1,
-                          int scrX0, int scrY0, int scrX1, int scrY1) {
-    beginPGL();
-    pgl.drawTexture(target, id, texW, texH, width, height,
-                    texX0, texY0, texX1, texY1,
-                    scrX0, scrY0, scrX1, scrY1);
-    endPGL();
-  }
-
-
   protected void loadTextureImpl(int sampling, boolean mipmap) {
     if (width == 0 || height == 0) return;
     if (texture == null || texture.contextIsOutdated()) {
@@ -5757,7 +5738,7 @@ public class PGraphicsOpenGL extends PGraphics {
    * drawing surface, making sure is updated to reflect the current contents
    * off the screen (or offscreen drawing surface).
    */
-  public Texture getTexture() {
+  protected Texture getTexture() {
     loadTexture();
     return texture;
   }
@@ -5769,7 +5750,7 @@ public class PGraphicsOpenGL extends PGraphics {
    *
    * @param img the image to have a texture metadata associated to it
    */
-  public Texture getTexture(PImage img) {
+  protected Texture getTexture(PImage img) {
     Texture tex = (Texture)initCache(img);
     if (tex == null) return null;
 
@@ -5790,8 +5771,7 @@ public class PGraphicsOpenGL extends PGraphics {
   }
 
 
-  @Override
-  public Object initCache(PImage img) {
+  protected Object initCache(PImage img) {
     if (!checkGLThread()) {
       return null;
     }