Subversion Repositories openrisc

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;

  }

}