Thanks for the reply. I've tried using the Volatile Images (which seems to be
the right approach as suggested by you and also in previous posts). However,
the scaling the backbuffer is for some reason painfully slow. It takes 4
seconds for a frame, instead of the 40ms with software based scaling. The
following short snipped reproduces the problem (justs scales a red square):
private static JFrame frame;
private static JPanel panel;
private static VolatileImage dummyImage;
private static Graphics dummyGraphics;
public static void main(String[] args) throws InterruptedException {
frame = new JFrame("...");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
panel = new JPanel() {
public void paintComponent(Graphics g) {
if (dummyImage != null) {
dummyGraphics.setColor(Color.RED);
dummyGraphics.fillRect(700, 350, 100, 100);
((Graphics2D)
g).setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
long s = System.nanoTime();
g.drawImage(dummyImage, 0, 0, 1600, 900, 0, 0,
800, 450, null);
System.out.println((System.nanoTime() - s) /
1000000);
System.out.println(dummyImage.getCapabilities().isAccelerated() + " " +
((Graphics2D)
g).getDeviceConfiguration().getImageCapabilities().isAccelerated());
}
}
};
frame.add(panel);
frame.setSize(1700, 1000);
GraphicsEnvironment ge =
GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsConfiguration gc =
ge.getDefaultScreenDevice().getDefaultConfiguration();
dummyImage = gc.createCompatibleVolatileImage(800, 450,
Transparency.OPAQUE);
dummyGraphics = dummyImage.getGraphics();
System.out.println(dummyImage.validate(gc));
System.out.println(dummyImage.validate(gc));
frame.setVisible(true);
Thread.sleep(4000);
for (int i = 0; i < 1000; i++) {
Thread.sleep(100);
frame.repaint();
}
}
The console output is:
Direct3D pipeline enabled on screen 0
1
0
4120
true true
4113
true true
4112
true true
3 calls to sun.java2d.windows.DDBlitLoops::Blit("Integer RGB DirectDraw",
SrcNoEa, "Integer RGB DirectDraw")
10 calls to D3DFillRect
3 calls to sun.java2d.loops.TransformHelper::TransformHelper(IntRgb, SrcNoEa,
IntArgbPre)
16 total calls to 3 different primitives
The VM params are:
-Dsun.java2d.d3d=True -Dsun.java2d.ddscale=true -Dsun.java2d.trace=count
It is the same result with the two PCs mentioned in the previous post. Only way
I can think of that it gets that slow is that the images are kept in the video
buffer but for some reason scaling is still done in software. Any ideas of what
is wrong? Am I missing something?
Thanks, Remo
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