Java SunGraphics2D.fillRect方法代码示例

import sun.java2d.SunGraphics2D; //导入方法依赖的package包/类
/**
 * Restores the passed surface if it was lost, resets the lost status.
 * @param sd surface to be validated
 * @return true if surface wasn't lost or if restoration was successful,
 * false otherwise
 */
private boolean validate(D3DWindowSurfaceData sd) {
    if (sd.isSurfaceLost()) {
        try {
            sd.restoreSurface();
            // if succeeded, first fill the surface with bg color
            // note: use the non-synch method to avoid incorrect lock order
            Color bg = sd.getPeer().getBackgroundNoSync();
            SunGraphics2D sg2d = new SunGraphics2D(sd, bg, bg, null);
            sg2d.fillRect(0, 0, sd.getBounds().width, sd.getBounds().height);
            sg2d.dispose();
            // now clean the dirty status so that we don't flip it
            // next time before it gets repainted; it is safe
            // to do without the lock because we will issue a
            // repaint anyway so we will not lose any rendering
            sd.markClean();
            // since the surface was successfully restored we need to
            // repaint whole window to repopulate the back-buffer
            repaintPeerTarget(sd.getPeer());
        } catch (InvalidPipeException ipe) {
            return false;
        }
    }
    return true;
}
 

import sun.java2d.SunGraphics2D; //导入方法依赖的package包/类
/**
 * Return a non-accelerated BufferedImage of the requested type with the
 * indicated subimage of the original image located at 0,0 in the new image.
 * If a bgColor is supplied, composite the original image over that color
 * with a SrcOver operation, otherwise make a SrcNoEa copy.
 * <p>
 * Returned BufferedImage is not accelerated for two reasons:
 * <ul>
 * <li> Types of the image and surface are predefined, because these types
 *      correspond to the TransformHelpers, which we know we have. And
 *      acceleration can change the type of the surface
 * <li> Image will be used only once and acceleration caching wouldn't help
 * </ul>
 */
BufferedImage makeBufferedImage(Image img, Color bgColor, int type,
                                int sx1, int sy1, int sx2, int sy2)
{
    final int width = sx2 - sx1;
    final int height = sy2 - sy1;
    final BufferedImage bimg = new BufferedImage(width, height, type);
    final SunGraphics2D g2d = (SunGraphics2D) bimg.createGraphics();
    g2d.setComposite(AlphaComposite.Src);
    bimg.setAccelerationPriority(0);
    if (bgColor != null) {
        g2d.setColor(bgColor);
        g2d.fillRect(0, 0, width, height);
        g2d.setComposite(AlphaComposite.SrcOver);
    }
    g2d.copyImage(img, 0, 0, sx1, sy1, width, height, null, null);
    g2d.dispose();
    return bimg;
}
 

import sun.java2d.SunGraphics2D; //导入方法依赖的package包/类
/**
 * Return a non-accelerated BufferedImage of the requested type with the
 * indicated subimage of the original image located at 0,0 in the new image.
 * If a bgColor is supplied, composite the original image over that color
 * with a SrcOver operation, otherwise make a SrcNoEa copy.
 * <p>
 * Returned BufferedImage is not accelerated for two reasons:
 * <ul>
 * <li> Types of the image and surface are predefined, because these types
 *      correspond to the TransformHelpers, which we know we have. And
 *      acceleration can change the type of the surface
 * <li> Image will be used only once and acceleration caching wouldn't help
 * </ul>
 */
private BufferedImage makeBufferedImage(Image img, Color bgColor, int type,
                                        int sx1, int sy1, int sx2, int sy2)
{
    final int width = sx2 - sx1;
    final int height = sy2 - sy1;
    final BufferedImage bimg = new BufferedImage(width, height, type);
    final SunGraphics2D g2d = (SunGraphics2D) bimg.createGraphics();
    g2d.setComposite(AlphaComposite.Src);
    bimg.setAccelerationPriority(0);
    if (bgColor != null) {
        g2d.setColor(bgColor);
        g2d.fillRect(0, 0, width, height);
        g2d.setComposite(AlphaComposite.SrcOver);
    }
    g2d.copyImage(img, 0, 0, sx1, sy1, width, height, null, null);
    g2d.dispose();
    return bimg;
}