Using getBackBufferCapabilities() In BufferCapabilities

Java Example Program/ Sample Source Code

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/**
* This test shows the different buffer capabilities for each
* GraphicsConfiguration on each GraphicsDevice.
*/
import java.awt.BorderLayout;
import java.awt.BufferCapabilities;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.ImageCapabilities;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.BorderFactory;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

/**
* This class wraps a graphics configuration so that it can be displayed nicely
* in components.
*/
class GetBackBufferCapabilitiesExample {
private GraphicsConfiguration gc;
private int index;

public GetBackBufferCapabilitiesExample(GraphicsConfiguration gc, int index) {
    this.gc = gc;
    this.index = index;
}

public GraphicsConfiguration getGC() {
    return gc;
}

public String toString() {
    return gc.toString();
}
}

/**
* Main frame class.
*/
public class GetBackBufferCapabilitiesExample extends JFrame implements
    ItemListener {

private JComboBox gcSelection = new JComboBox();
private JCheckBox imageAccelerated = new JCheckBox("Accelerated", false);
private JCheckBox imageTrueVolatile = new JCheckBox("Volatile", false);
private JCheckBox flipping = new JCheckBox("Flipping", false);
private JLabel flippingMethod = new JLabel("");
private JCheckBox fullScreen = new JCheckBox("Full Screen Only", false);
private JCheckBox multiBuffer = new JCheckBox("Multi-Buffering", false);
private JCheckBox fbAccelerated = new JCheckBox("Accelerated", false);
private JCheckBox fbTrueVolatile = new JCheckBox("Volatile", false);
private JCheckBox bbAccelerated = new JCheckBox("Accelerated", false);
private JCheckBox bbTrueVolatile = new JCheckBox("Volatile", false);

public GetBackBufferCapabilitiesExample(GraphicsDevice dev) {
    super(dev.getDefaultConfiguration());
    addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent ev) {
        System.exit(0);
      }
    });
    initComponents(getContentPane());
    GraphicsConfiguration[] gcs = dev.getConfigurations();
    for (int i = 0; i < gcs.length; i++) {
      gcSelection.addItem(new GetBackBufferCapabilitiesExample(gcs[i], i));
    }
    gcSelection.addItemListener(this);
    gcChanged();
}

/**
   * Creates and lays out components in the container. See the comments below
   * for an organizational overview by panel.
   */
private void initComponents(Container c) {
    c.setLayout(new BorderLayout());
    // Graphics Config
    JPanel gcPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
    c.add(gcPanel, BorderLayout.NORTH);
    gcSelection.setPreferredSize(new Dimension(400, 30));
    gcPanel.add(gcSelection);
    // Capabilities
    JPanel capsPanel = new JPanel(new BorderLayout());
    c.add(capsPanel, BorderLayout.CENTER);
    // Image Capabilities
    JPanel imageCapsPanel = new JPanel(new GridLayout(2, 1));
    capsPanel.add(imageCapsPanel, BorderLayout.NORTH);
    imageCapsPanel.setBorder(BorderFactory
        .createTitledBorder("Image Capabilities"));
    imageAccelerated.setEnabled(false);
    imageCapsPanel.add(imageAccelerated);
    imageTrueVolatile.setEnabled(false);
    imageCapsPanel.add(imageTrueVolatile);
    // Buffer Capabilities
    JPanel bufferCapsPanel = new JPanel(new BorderLayout());
    capsPanel.add(bufferCapsPanel, BorderLayout.CENTER);
    bufferCapsPanel.setBorder(BorderFactory
        .createTitledBorder("Buffer Capabilities"));
    // Buffer Access
    JPanel bufferAccessCapsPanel = new JPanel(new GridLayout(3, 1));
    bufferAccessCapsPanel.setPreferredSize(new Dimension(300, 88));
    bufferCapsPanel.add(bufferAccessCapsPanel, BorderLayout.NORTH);
    // Flipping
    JPanel flippingPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    bufferAccessCapsPanel.add(flippingPanel);
    flippingPanel.add(flipping);
    flipping.setEnabled(false);
    flippingPanel.add(flippingMethod);
    // Full-screen
    JPanel fsPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    bufferAccessCapsPanel.add(fsPanel);
    JPanel indentPanel = new JPanel();
    indentPanel.setPreferredSize(new Dimension(30, 30));
    fsPanel.add(indentPanel);
    fsPanel.add(fullScreen);
    fullScreen.setEnabled(false);
    // Multi-buffering
    JPanel mbPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    bufferAccessCapsPanel.add(mbPanel);
    indentPanel = new JPanel();
    indentPanel.setPreferredSize(new Dimension(30, 30));
    mbPanel.add(indentPanel);
    mbPanel.add(multiBuffer);
    multiBuffer.setEnabled(false);
    // Front and Back Buffer Capabilities
    JPanel buffersPanel = new JPanel(new GridLayout(1, 2));
    bufferCapsPanel.add(buffersPanel, BorderLayout.CENTER);
    // Front Buffer
    JPanel fbPanel = new JPanel(new GridLayout(2, 1));
    fbPanel.setBorder(BorderFactory.createTitledBorder("Front Buffer"));
    buffersPanel.add(fbPanel);
    fbPanel.add(fbAccelerated);
    fbAccelerated.setEnabled(false);
    fbPanel.add(fbTrueVolatile);
    fbTrueVolatile.setEnabled(false);
    // Back Buffer
    JPanel bbPanel = new JPanel(new GridLayout(2, 1));
    bbPanel.setPreferredSize(new Dimension(250, 80));
    bbPanel.setBorder(BorderFactory
        .createTitledBorder("Back and Intermediate Buffers"));
    buffersPanel.add(bbPanel);
    bbPanel.add(bbAccelerated);
    bbAccelerated.setEnabled(false);
    bbPanel.add(bbTrueVolatile);
    bbTrueVolatile.setEnabled(false);
}

public void itemStateChanged(ItemEvent ev) {
    gcChanged();
}

private void gcChanged() {
    GetBackBufferCapabilitiesExample wrap = (GetBackBufferCapabilitiesExample) gcSelection.getSelectedItem();
    // assert wrap != null;
    GraphicsConfiguration gc = wrap.getGC();
    // assert gc != null;
    // Image Caps
    ImageCapabilities imageCaps = gc.getImageCapabilities();
    imageAccelerated.setSelected(imageCaps.isAccelerated());
    imageTrueVolatile.setSelected(imageCaps.isTrueVolatile());
    // Buffer Caps
    BufferCapabilities bufferCaps = gc.getBufferCapabilities();
    flipping.setSelected(bufferCaps.isPageFlipping());
    flippingMethod.setText(getFlipText(bufferCaps.getFlipContents()));
    fullScreen.setSelected(bufferCaps.isFullScreenRequired());
    multiBuffer.setSelected(bufferCaps.isMultiBufferAvailable());
    // Front buffer caps
    imageCaps = bufferCaps.getFrontBufferCapabilities();
    fbAccelerated.setSelected(imageCaps.isAccelerated());
    fbTrueVolatile.setSelected(imageCaps.isTrueVolatile());
    imageCaps = bufferCaps.getFrontBufferCapabilities();
    // Back buffer caps
    imageCaps = bufferCaps.getBackBufferCapabilities();
    bbAccelerated.setSelected(imageCaps.isAccelerated());
    bbTrueVolatile.setSelected(imageCaps.isTrueVolatile());
}

private static String getFlipText(BufferCapabilities.FlipContents flip) {
    if (flip == null) {
      return "";
    } else if (flip == BufferCapabilities.FlipContents.UNDEFINED) {
      return "Method Unspecified";
    } else if (flip == BufferCapabilities.FlipContents.BACKGROUND) {
      return "Cleared to Background";
    } else if (flip == BufferCapabilities.FlipContents.PRIOR) {
      return "Previous Front Buffer";
    } else { // if (flip == BufferCapabilities.FlipContents.COPIED)
      return "Copied";
    }
}

public static void main(String[] args) {
    GraphicsEnvironment ge = GraphicsEnvironment
        .getLocalGraphicsEnvironment();
    GraphicsDevice[] devices = ge.getScreenDevices();
    for (int i = 0; i < devices.length; i++) {
      GetBackBufferCapabilitiesExample tst = new GetBackBufferCapabilitiesExample(
          devices[i]);
      tst.pack();
      tst.setVisible(true);
    }
}
}

Using getBackBufferCapabilities() In BufferCapabilities

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