Java Raster.getDataBuffer方法代碼示例

import java.awt.image.Raster; //導入方法依賴的package包/類
/**
 * {@inheritDoc}
 */
public final Raster getRaster(int x, int y, int w, int h) {
    // If working raster is big enough, reuse it. Otherwise,
    // build a large enough new one.
    Raster raster = saved;
    if (raster == null ||
        raster.getWidth() < w || raster.getHeight() < h)
    {
        raster = getCachedRaster(model, w, h);
        saved = raster;
    }

    // Access raster internal int array. Because we use a DirectColorModel,
    // we know the DataBuffer is of type DataBufferInt and the SampleModel
    // is SinglePixelPackedSampleModel.
    // Adjust for initial offset in DataBuffer and also for the scanline
    // stride.
    // These calls make the DataBuffer non-acceleratable, but the
    // Raster is never Stable long enough to accelerate anyway...
    DataBufferInt rasterDB = (DataBufferInt)raster.getDataBuffer();
    int[] pixels = rasterDB.getData(0);
    int off = rasterDB.getOffset();
    int scanlineStride = ((SinglePixelPackedSampleModel)
                          raster.getSampleModel()).getScanlineStride();
    int adjust = scanlineStride - w;

    fillRaster(pixels, off, adjust, x, y, w, h); // delegate to subclass

    return raster;
}
 

import java.awt.image.Raster; //導入方法依賴的package包/類
public void compose(Raster src, Raster dstIn, WritableRaster dstOut) {
    int w = src.getWidth();
    int h = src.getHeight();

    DataBufferInt srcDB = (DataBufferInt) src.getDataBuffer();
    DataBufferInt dstOutDB = (DataBufferInt) dstOut.getDataBuffer();
    int srcRGB[] = srcDB.getBankData()[0];
    int dstOutRGB[] = dstOutDB.getBankData()[0];
    int srcOffset = srcDB.getOffset();
    int dstOutOffset = dstOutDB.getOffset();
    int srcScanStride = ((SinglePixelPackedSampleModel) src.getSampleModel()).getScanlineStride();
    int dstOutScanStride = ((SinglePixelPackedSampleModel) dstOut.getSampleModel()).getScanlineStride();
    int srcAdjust = srcScanStride - w;
    int dstOutAdjust = dstOutScanStride - w;

    int si = srcOffset;
    int doi = dstOutOffset;

    for (int i = 0; i < h; i++) {
        for (int j = 0; j < w; j++) {
            dstOutRGB[doi] = srcRGB[si] ^ 0x00ffffff;
            si++;
            doi++;
        }

        si += srcAdjust;
        doi += dstOutAdjust;
    }
}
 

import java.awt.image.Raster; //導入方法依賴的package包/類
public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
    BufferedImage bimage = getScaledIconImage(imageList, width, height);
    if (bimage == null) {
        return null;
    }
    Raster raster = bimage.getRaster();
    DataBuffer buffer = raster.getDataBuffer();
    return (DataBufferInt)buffer;
}
 

import java.awt.image.Raster; //導入方法依賴的package包/類
/**
 * The runnable method for this class. This will produce an image using
 * the current RenderableImage and RenderContext and send it to all the
 * ImageConsumer currently registered with this class.
 */
public void run() {
    // First get the rendered image
    RenderedImage rdrdImage;
    if (rc != null) {
        rdrdImage = rdblImage.createRendering(rc);
    } else {
        rdrdImage = rdblImage.createDefaultRendering();
    }

    // And its ColorModel
    ColorModel colorModel = rdrdImage.getColorModel();
    Raster raster = rdrdImage.getData();
    SampleModel sampleModel = raster.getSampleModel();
    DataBuffer dataBuffer = raster.getDataBuffer();

    if (colorModel == null) {
        colorModel = ColorModel.getRGBdefault();
    }
    int minX = raster.getMinX();
    int minY = raster.getMinY();
    int width = raster.getWidth();
    int height = raster.getHeight();

    Enumeration<ImageConsumer> icList;
    ImageConsumer ic;
    // Set up the ImageConsumers
    icList = ics.elements();
    while (icList.hasMoreElements()) {
        ic = icList.nextElement();
        ic.setDimensions(width,height);
        ic.setHints(ImageConsumer.TOPDOWNLEFTRIGHT |
                    ImageConsumer.COMPLETESCANLINES |
                    ImageConsumer.SINGLEPASS |
                    ImageConsumer.SINGLEFRAME);
    }

    // Get RGB pixels from the raster scanline by scanline and
    // send to consumers.
    int pix[] = new int[width];
    int i,j;
    int numBands = sampleModel.getNumBands();
    int tmpPixel[] = new int[numBands];
    for (j = 0; j < height; j++) {
        for(i = 0; i < width; i++) {
            sampleModel.getPixel(i, j, tmpPixel, dataBuffer);
            pix[i] = colorModel.getDataElement(tmpPixel, 0);
        }
        // Now send the scanline to the Consumers
        icList = ics.elements();
        while (icList.hasMoreElements()) {
            ic = icList.nextElement();
            ic.setPixels(0, j, width, 1, colorModel, pix, 0, width);
        }
    }

    // Now tell the consumers we're done.
    icList = ics.elements();
    while (icList.hasMoreElements()) {
        ic = icList.nextElement();
        ic.imageComplete(ImageConsumer.STATICIMAGEDONE);
    }
}