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Added default background color for transparent indexed images.

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This commit is contained in:
Harald Kuhr 2009-11-04 01:23:38 +01:00
parent ebc365528a
commit c801926a02
1 changed files with 28 additions and 5 deletions
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33
twelvemonkeys-imageio/core/src/main/java/com/twelvemonkeys/imageio/ImageReaderBase.java
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@ -41,6 +41,7 @@ import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.awt.image.IndexColorModel;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
@ -340,12 +341,20 @@ public abstract class ImageReaderBase extends ImageReader {
private static class ImageLabel extends JLabel {
Paint mBackground;
public ImageLabel(BufferedImage pImage) {
final Paint mCheckeredBG;
final Color mDefaultBG;
public ImageLabel(final BufferedImage pImage) {
super(new BufferedImageIcon(pImage));
setOpaque(false);
setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
mBackground = createTexture();
mCheckeredBG = createTexture();
// For indexed color, default to the color of the transparent pixel, if any
mDefaultBG = getDefaultBackground(pImage);
mBackground = mDefaultBG != null ? mDefaultBG : mCheckeredBG;
JPopupMenu popup = createBackgroundPopup();
@ -363,7 +372,8 @@ public abstract class ImageReaderBase extends ImageReader {
private JPopupMenu createBackgroundPopup() {
JPopupMenu popup = new JPopupMenu();
ButtonGroup group = new ButtonGroup();
addCheckBoxItem(new ChangeBackgroundAction("Default", mBackground), popup, group);
addCheckBoxItem(new ChangeBackgroundAction("Checkered", mCheckeredBG), popup, group);
popup.addSeparator();
addCheckBoxItem(new ChangeBackgroundAction("White", Color.WHITE), popup, group);
addCheckBoxItem(new ChangeBackgroundAction("Light", Color.LIGHT_GRAY), popup, group);
@ -371,7 +381,8 @@ public abstract class ImageReaderBase extends ImageReader {
addCheckBoxItem(new ChangeBackgroundAction("Dark", Color.DARK_GRAY), popup, group);
addCheckBoxItem(new ChangeBackgroundAction("Black", Color.BLACK), popup, group);
popup.addSeparator();
addCheckBoxItem(new ChooseBackgroundAction("Choose...", Color.BLUE), popup, group);
addCheckBoxItem(new ChooseBackgroundAction("Choose...", mDefaultBG != null ? mDefaultBG : Color.BLUE), popup, group);
return popup;
}
@ -381,7 +392,19 @@ public abstract class ImageReaderBase extends ImageReader {
pPopup.add(item);
}
private Paint createTexture() {
private static Color getDefaultBackground(BufferedImage pImage) {
if (pImage.getColorModel() instanceof IndexColorModel) {
IndexColorModel cm = (IndexColorModel) pImage.getColorModel();
int transparent = cm.getTransparentPixel();
if (transparent >= 0) {
return new Color(cm.getRGB(transparent), false);
}
}
return null;
}
private static Paint createTexture() {
GraphicsConfiguration graphicsConfiguration = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
BufferedImage pattern = graphicsConfiguration.createCompatibleImage(20, 20);
Graphics2D g = pattern.createGraphics();