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package gnu.java.awt.peer.x;
import gnu.x11.Display;
import gnu.x11.image.ZPixmap;
import java.awt.GraphicsEnvironment;
import java.awt.image.DataBuffer;
/**
* A DataBuffer implementation that is based on a ZPixmap. This is used
* as backing store for BufferedImages.
*/
class ZPixmapDataBuffer
extends DataBuffer
{
/**
* The backing ZPixmap.
*/
private ZPixmap zpixmap;
/**
* Creates a new ZPixmapDataBuffer with a specified width and height.
*
* @param d the X display
* @param w the width
* @param h the height
*/
ZPixmapDataBuffer(int w, int h)
{
super(TYPE_BYTE, w * h * 3); // TODO: Support non-24-bit-resolutions.
GraphicsEnvironment env =
GraphicsEnvironment.getLocalGraphicsEnvironment();
XGraphicsDevice dev = (XGraphicsDevice) env.getDefaultScreenDevice();
Display d = dev.getDisplay();
zpixmap = new ZPixmap(d, w, h, d.default_pixmap_format);
}
/**
* Creates a ZPixmapDataBuffer from an existing ZPixmap.
*
* @param zpixmap the ZPixmap to wrap
*/
ZPixmapDataBuffer(ZPixmap zpixmap)
{
super(TYPE_BYTE, zpixmap.get_data_length());
this.zpixmap = zpixmap;
}
@Override
public int getElem(int bank, int i)
{
return 0xff & zpixmap.get_data_element(i);
}
@Override
public void setElem(int bank, int i, int val)
{
zpixmap.set_data_element(i, (byte) val);
}
ZPixmap getZPixmap()
{
return zpixmap;
}
}
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