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*
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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package sun.java2d.x11;
import java.awt.GraphicsConfiguration;
import java.awt.ImageCapabilities;
import java.awt.Transparency;
import java.awt.image.ColorModel;
import sun.awt.X11GraphicsConfig;
import sun.awt.image.SunVolatileImage;
import sun.awt.image.VolatileSurfaceManager;
import sun.java2d.SurfaceData;
/**
* X11 platform implementation of the VolatileSurfaceManager class.
* The class attempts to create and use a pixmap-based SurfaceData
* object (X11PixmapSurfaceData).
* If this object cannot be created or re-created as necessary, the
* class falls back to a system memory based SurfaceData object
* (BufImgSurfaceData) that will be used until the accelerated
* SurfaceData can be restored.
*/
public class X11VolatileSurfaceManager extends VolatileSurfaceManager {
private boolean accelerationEnabled;
public X11VolatileSurfaceManager(SunVolatileImage vImg, Object context) {
super(vImg, context);
// We only accelerated opaque vImages currently
accelerationEnabled = X11SurfaceData.isAccelerationEnabled() &&
(vImg.getTransparency() == Transparency.OPAQUE);
if ((context != null) && !accelerationEnabled) {
// if we're wrapping a backbuffer drawable, we must ensure that
// the accelerated surface is initialized up front, regardless
// of whether acceleration is enabled. But we need to set
// the accelerationEnabled field to true to reflect that this
// SM is actually accelerated.
accelerationEnabled = true;
sdAccel = initAcceleratedSurface();
sdCurrent = sdAccel;
if (sdBackup != null) {
// release the system memory backup surface, as we won't be
// needing it in this case
sdBackup = null;
}
}
}
protected boolean isAccelerationEnabled() {
return accelerationEnabled;
}
/**
* Create a pixmap-based SurfaceData object
*/
protected SurfaceData initAcceleratedSurface() {
SurfaceData sData;
try {
X11GraphicsConfig gc = (X11GraphicsConfig)vImg.getGraphicsConfig();
ColorModel cm = gc.getColorModel();
long drawable = 0;
if (context instanceof Long) {
drawable = ((Long)context).longValue();
}
sData = X11SurfaceData.createData(gc,
vImg.getWidth(),
vImg.getHeight(),
cm, vImg, drawable,
Transparency.OPAQUE);
} catch (NullPointerException ex) {
sData = null;
} catch (OutOfMemoryError er) {
sData = null;
}
return sData;
}
protected boolean isConfigValid(GraphicsConfiguration gc) {
// REMIND: we might be too paranoid here, requiring that
// the GC be exactly the same as the original one. The
// real answer is one that guarantees that pixmap copies
// will be correct (which requires like bit depths and
// formats).
return ((gc == null) || (gc == vImg.getGraphicsConfig()));
}
/**
* Need to override the default behavior because Pixmaps-based
* images are accelerated but not volatile.
*/
@Override
public ImageCapabilities getCapabilities(GraphicsConfiguration gc) {
if (isConfigValid(gc) && isAccelerationEnabled()) {
// accelerated but not volatile
return new ImageCapabilities(true);
}
// neither accelerated nor volatile
return new ImageCapabilities(false);
}
}