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* version 2 for more details (a copy is included in the LICENSE file that
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* 2 along with this work; if not, write to the Free Software Foundation,
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/*
* @test
* @key headful
* @bug 6648018 6652662
* @summary Verifies that rendering to a cached onscreen Graphics works
* @author Dmitri.Trembovetski@sun.com: area=Graphics
* @run main/othervm RenderingToCachedGraphicsTest
* @run main/othervm -Dsun.java2d.d3d=false RenderingToCachedGraphicsTest
*/
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.GraphicsEnvironment;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.image.BufferStrategy;
import java.awt.image.BufferedImage;
import static java.awt.image.VolatileImage.*;
import java.awt.image.VolatileImage;
import java.io.File;
import java.util.concurrent.CountDownLatch;
import javax.imageio.ImageIO;
public class RenderingToCachedGraphicsTest extends Frame {
private static volatile boolean failed = false;
private static volatile CountDownLatch latch;
private Graphics cachedGraphics;
private Canvas renderCanvas;
public RenderingToCachedGraphicsTest() {
super("Test starts in 2 seconds");
renderCanvas = new Canvas() {
@Override
public void paint(Graphics g) {
if (getWidth() < 100 || getHeight() < 100) {
repaint();
return;
}
// wait for a bit so that Vista's Window manager's animation
// effects on window's appearance are completed (6652662)
try { Thread.sleep(2000); } catch (InterruptedException ex) {}
try {
runTest();
} catch (Throwable t) {
failed = true;
} finally {
latch.countDown();
}
}
@Override
public void update(Graphics g) {}
};
add("Center", renderCanvas);
}
private void runTest() {
// this will cause screen update manager to dump the accelerated surface
// for this canvas
renderCanvas.createBufferStrategy(2);
BufferStrategy bs = renderCanvas.getBufferStrategy();
do {
Graphics bsg = bs.getDrawGraphics();
bsg.setColor(Color.blue);
bsg.fillRect(0, 0,
renderCanvas.getWidth(), renderCanvas.getHeight());
} while (bs.contentsLost() || bs.contentsRestored());
// grab the "unaccelerated" onscreen surface
cachedGraphics = renderCanvas.getGraphics();
cachedGraphics.setColor(Color.red);
cachedGraphics.fillRect(0, 0, getWidth(), getHeight());
bs.dispose();
bs = null;
// now the update manager should be able to accelerate onscreen
// rendering to it again
cachedGraphics.setColor(Color.green);
// this causes restoration of the new accelerated onscreen surface
// (it is created in "lost" state)
cachedGraphics.fillRect(0, 0,
renderCanvas.getWidth(),
renderCanvas.getHeight());
Toolkit.getDefaultToolkit().sync();
// and now we should be able to render to it
cachedGraphics.fillRect(0, 0,
renderCanvas.getWidth(),
renderCanvas.getHeight());
Toolkit.getDefaultToolkit().sync();
Robot robot = null;
try {
robot = new Robot();
} catch (Exception e) {
e.printStackTrace();
failed = true;
return;
}
Point p = renderCanvas.getLocationOnScreen();
Rectangle r = new Rectangle(p.x, p.y,
renderCanvas.getWidth(),
renderCanvas.getHeight());
BufferedImage bi = robot.createScreenCapture(r);
for (int y = 0; y < bi.getHeight(); y++) {
for (int x = 0; x < bi.getWidth(); x++) {
if (bi.getRGB(x, y) != Color.green.getRGB()) {
System.err.println("Colors mismatch!");
String name = "RenderingToCachedGraphicsTest.png";
try {
ImageIO.write(bi, "png", new File(name));
System.err.println("Dumped grabbed image to: "+name);
} catch (Exception e) {}
failed = true;
return;
}
}
}
}
public static void main(String[] args) {
int depth = GraphicsEnvironment.getLocalGraphicsEnvironment().
getDefaultScreenDevice().getDefaultConfiguration().
getColorModel().getPixelSize();
if (depth < 16) {
System.out.println("Test PASSED (depth < 16bit)");
return;
}
latch = new CountDownLatch(1);
RenderingToCachedGraphicsTest t1 = new RenderingToCachedGraphicsTest();
t1.pack();
t1.setSize(300, 300);
t1.setVisible(true);
try { latch.await(); } catch (InterruptedException ex) {}
t1.dispose();
if (failed) {
throw new
RuntimeException("Failed: rendering didn't show up");
}
System.out.println("Test PASSED");
}
}