SDK:

- add invert filter (thanks to @jmaasing)

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9756 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

jme3-texture-editor/src/com/jme3/gde/textureeditor/ImageEditorComponent.java

@@ -36,6 +36,7 @@ import org.openide.windows.TopComponent;
 import com.jme3.gde.textureeditor.filters.BrightFilter;
 import com.jme3.gde.textureeditor.filters.BumpMapFilter;
 import com.jme3.gde.textureeditor.filters.GrayscaleFilter;
+import com.jme3.gde.textureeditor.filters.InvertFilter;
 import com.jme3.gde.textureeditor.filters.MirrorFilter;
 import com.jme3.gde.textureeditor.filters.ResizeFilter;
 import com.jme3.gde.textureeditor.filters.RotateLeftFilter;
@@ -47,7 +48,6 @@ import org.openide.DialogDisplayer;
 import org.openide.NotifyDescriptor;
 import org.openide.NotifyDescriptor.Confirmation;
 import org.openide.NotifyDescriptor.Message;
-import org.openide.awt.UndoRedo;
 import org.openide.cookies.SaveCookie;
 import org.openide.filesystems.FileChooserBuilder;
 import org.openide.filesystems.FileObject;
@@ -369,6 +369,13 @@ public class ImageEditorComponent implements EditorToolTarget {
         final JMenuItem gray = filters.add("Grayscale");
         final JMenuItem bright = filters.add("Brightness");
         final JMenuItem spheremap = filters.add("SphereMapped");
+        final JMenu invertMenu = new JMenu("Invert") ;
+        final JMenuItem invertAll = invertMenu.add("All") ;
+        final JMenuItem invertAlpha = invertMenu.add("Alpha") ;
+        final JMenuItem invertRed = invertMenu.add("Red") ;
+        final JMenuItem invertGreen = invertMenu.add("Green") ;
+        final JMenuItem invertBlue = invertMenu.add("Blue") ;
+        filters.add(invertMenu) ;
 
         ActionListener al = new ActionListener() {
 
@@ -386,8 +393,17 @@ public class ImageEditorComponent implements EditorToolTarget {
                     spawnEditor(BrightFilter.create().filter(editedImage, ImageEditorComponent.this));
                 } else if (source == spheremap) {
                     spawnEditor(SphereMappedFilter.create().filter(editedImage));
+                } else if (source == invertAll) {
+                    spawnEditor(new InvertFilter().filter(editedImage, InvertFilter.Channel.All));
+                } else if (source == invertAlpha) {
+                    spawnEditor(new InvertFilter().filter(editedImage, InvertFilter.Channel.Alpha));
+                } else if (source == invertRed) {
+                    spawnEditor(new InvertFilter().filter(editedImage, InvertFilter.Channel.Red));
+                } else if (source == invertGreen) {
+                    spawnEditor(new InvertFilter().filter(editedImage, InvertFilter.Channel.Green));
+                } else if (source == invertBlue) {
+                    spawnEditor(new InvertFilter().filter(editedImage, InvertFilter.Channel.Blue));
                 }
-
             }
         };
 

jme3-texture-editor/src/com/jme3/gde/textureeditor/filters/InvertFilter.java

@@ -0,0 +1,73 @@
+package com.jme3.gde.textureeditor.filters;
+
+import java.awt.image.BufferedImage;
+
+/**
+ * Invert channels in an image. It takes the ARGB color component and set it to 255 - value.
+ */
+public class InvertFilter implements BufferedImageFilter {
+
+    public enum Channel {
+
+        All, Red, Green, Blue, Alpha;
+    }
+
+    public BufferedImage filter(BufferedImage source, Object... args) {
+        final Channel channel;
+        if ((args == null) || (args.length < 1) || (!(args[0] instanceof Channel))) {
+            channel = Channel.All;
+        } else {
+            channel = (Channel) args[0];
+        }
+        BufferedImage result = new BufferedImage(
+                source.getWidth(),
+                source.getHeight(),
+                BufferedImage.TYPE_INT_ARGB);
+        final int height = source.getHeight();
+        final int width = source.getWidth();
+        for (int y = 0; y < height; y++) {
+            for (int x = 0; x < width; x++) {
+                final int sourceARGB = source.getRGB(x, y);
+                final int targetARGB = invert(sourceARGB, channel);
+                result.setRGB(x, y, targetARGB);
+            }
+        }
+        return result;
+    }
+
+    private int invert(final int sourceARGB, final Channel channel) {
+        int a = (sourceARGB >> 24) & 0xff;
+        int r = (sourceARGB >> 16) & 0xff;
+        int g = (sourceARGB >> 8) & 0xff;
+        int b = sourceARGB & 0xff;
+
+        switch (channel) {
+            case Alpha:
+                a = 255 - a;
+                break;
+            case Red:
+                r = 255 - r;
+                break;
+            case Green:
+                g = 255 - g;
+                break;
+            case Blue:
+                b = 255 - b;
+                break;
+            default:
+                a = 255 - a;
+                r = 255 - r;
+                g = 255 - g;
+                b = 255 - b;
+        }
+        return packPixel(a, r, g, b);
+    }
+
+    private int packPixel(int alpha, int red, int green, int blue) {
+        final int argb = ((alpha << 24) & 0xff000000)
+                | ((red << 16) & 0x00ff0000)
+                | ((green << 8) & 0x0000ff00)
+                | (blue & 0x000000ff);
+        return argb;
+    }
+}