Cycle palettes

src/com/bytezone/diskbrowser/applefile/DoubleHiResImage.java

@@ -125,7 +125,7 @@ public class DoubleHiResImage extends HiResImage
   private final byte[] auxBuffer;
   private DoubleScrunch doubleScrunch;
   byte[] packedBuffer;
-  private final int paletteIndex = 2;
+  //  private final int paletteIndex = 2;
 
   public DoubleHiResImage (String name, byte[] buffer, byte[] auxBuffer)
   {
@@ -198,6 +198,8 @@ public class DoubleHiResImage extends HiResImage
   @Override
   protected void createColourImage ()
   {
+    int paletteNdx = paletteIndex % palette2.length;
+
     // image will be doubled horizontally
     image = new BufferedImage (140 * 2, 192, BufferedImage.TYPE_INT_RGB);
     DataBuffer dataBuffer = image.getRaster ().getDataBuffer ();
@@ -217,8 +219,8 @@ public class DoubleHiResImage extends HiResImage
             for (int px = 0; px < 28; px += 4)
             {
               int val = (value >> px) & 0x0F;
-              dataBuffer.setElem (ndx++, palette2[paletteIndex][val]);
-              dataBuffer.setElem (ndx++, palette2[paletteIndex][val]);  // repeat pixel
+              dataBuffer.setElem (ndx++, palette2[paletteNdx][val]);
+              dataBuffer.setElem (ndx++, palette2[paletteNdx][val]);  // repeat pixel
             }
           }
         }

src/com/bytezone/diskbrowser/applefile/HiResImage.java

@@ -17,6 +17,7 @@ public abstract class HiResImage extends AbstractFile
 
   protected static boolean colourQuirks;
   protected static boolean monochrome;
+  protected static int paletteIndex;
 
   protected int fileType;
   protected int auxType;
@@ -79,6 +80,13 @@ public abstract class HiResImage extends AbstractFile
 
   protected abstract void createColourImage ();
 
+  public void cyclePalette ()
+  {
+    ++paletteIndex;
+    if (!monochrome)
+      createImage ();
+  }
+
   public void setColourQuirks (boolean value)
   {
     if (colourQuirks == value)

src/com/bytezone/diskbrowser/gui/DataPanel.java

@@ -130,6 +130,17 @@ class DataPanel extends JTabbedPane
     mh.colourQuirksItem.setAction (new ColourQuirksAction (this));
     mh.monochromeItem.setAction (new MonochromeAction (this));
     mh.debuggingItem.setAction (new DebuggingAction (this));
+    mh.paletteItem.setAction (new PaletteAction (this));
+  }
+
+  public void cyclePalette ()
+  {
+    if (currentDataSource instanceof HiResImage)
+    {
+      HiResImage image = (HiResImage) currentDataSource;
+      image.cyclePalette ();
+      imagePanel.setImage (image.getImage ());
+    }
   }
 
   public void setColourQuirks (boolean value)

src/com/bytezone/diskbrowser/gui/MenuHandler.java

@@ -60,6 +60,7 @@ public class MenuHandler
   JMenuItem colourQuirksItem = new JCheckBoxMenuItem ("Colour quirks");
   JMenuItem monochromeItem = new JCheckBoxMenuItem ("Monochrome");
   JMenuItem debuggingItem = new JCheckBoxMenuItem ("Debugging");
+  JMenuItem paletteItem = new JMenuItem ("Cycle Palette");
 
   public MenuHandler (Preferences prefs)
   {
@@ -109,6 +110,7 @@ public class MenuHandler
     formatMenu.add (colourQuirksItem);
     formatMenu.add (monochromeItem);
     formatMenu.add (debuggingItem);
+    formatMenu.add (paletteItem);
 
     helpMenu.add (new JMenuItem (new EnvironmentAction ()));
 

src/com/bytezone/diskbrowser/gui/PaletteAction.java

@@ -0,0 +1,28 @@
+package com.bytezone.diskbrowser.gui;
+
+import java.awt.event.ActionEvent;
+import java.awt.event.KeyEvent;
+
+import javax.swing.AbstractAction;
+import javax.swing.Action;
+import javax.swing.KeyStroke;
+
+public class PaletteAction extends AbstractAction
+{
+  private final DataPanel owner;
+
+  public PaletteAction (DataPanel owner)
+  {
+    super ("Cycle Palette");
+    putValue (Action.SHORT_DESCRIPTION, "Select next color palette");
+    putValue (Action.ACCELERATOR_KEY, KeyStroke.getKeyStroke ("alt P"));
+    putValue (Action.MNEMONIC_KEY, KeyEvent.VK_P);
+    this.owner = owner;
+  }
+
+  @Override
+  public void actionPerformed (ActionEvent e)
+  {
+    owner.cyclePalette ();
+  }
+}