WPrinterJob.java 文件源码

/**
 * Examine the metrics captured by the
 * <code>PeekGraphics</code> instance and
 * if capable of directly converting this
 * print job to the printer's control language
 * or the native OS's graphics primitives, then
 * return a <code>PathGraphics</code> to perform
 * that conversion. If there is not an object
 * capable of the conversion then return
 * <code>null</code>. Returning <code>null</code>
 * causes the print job to be rasterized.
 */

@Override
protected Graphics2D createPathGraphics(PeekGraphics peekGraphics,
                                        PrinterJob printerJob,
                                        Printable painter,
                                        PageFormat pageFormat,
                                        int pageIndex) {

    WPathGraphics pathGraphics;
    PeekMetrics metrics = peekGraphics.getMetrics();

    /* If the application has drawn anything that
     * out PathGraphics class can not handle then
     * return a null PathGraphics. If the property
     * to force the raster pipeline has been set then
     * we also want to avoid the path (pdl) pipeline
     * and return null.
     */
   if (forcePDL == false && (forceRaster == true
                              || metrics.hasNonSolidColors()
                              || metrics.hasCompositing()
                              )) {
        pathGraphics = null;
    } else {
        BufferedImage bufferedImage = new BufferedImage(8, 8,
                                        BufferedImage.TYPE_INT_RGB);
        Graphics2D bufferedGraphics = bufferedImage.createGraphics();

        boolean canRedraw = peekGraphics.getAWTDrawingOnly() == false;
        pathGraphics =  new WPathGraphics(bufferedGraphics, printerJob,
                                          painter, pageFormat, pageIndex,
                                          canRedraw);
    }

    return pathGraphics;
}