Java SunWritableRaster.stealData方法代码示例

import sun.awt.image.SunWritableRaster; //导入方法依赖的package包/类
/**
 * Updates the splash window with current contents of the overlay image.
 *
 * @throws IllegalStateException if the overlay image does not exist;
 *         for example, if {@code createGraphics} has never been called,
 *         or if the splash screen has already been closed
 */
public void update() throws IllegalStateException {
    BufferedImage image;
    synchronized (SplashScreen.class) {
        checkVisible();
        image = this.image;
    }
    if (image == null) {
        throw new IllegalStateException("no overlay image available");
    }
    DataBuffer buf = image.getRaster().getDataBuffer();
    if (!(buf instanceof DataBufferInt)) {
        throw new AssertionError("Overlay image DataBuffer is of invalid type == "+buf.getClass().getName());
    }
    int numBanks = buf.getNumBanks();
    if (numBanks!=1) {
        throw new AssertionError("Invalid number of banks =="+numBanks+" in overlay image DataBuffer");
    }
    if (!(image.getSampleModel() instanceof SinglePixelPackedSampleModel)) {
        throw new AssertionError("Overlay image has invalid sample model == "+image.getSampleModel().getClass().getName());
    }
    SinglePixelPackedSampleModel sm = (SinglePixelPackedSampleModel)image.getSampleModel();
    int scanlineStride = sm.getScanlineStride();
    Rectangle rect = image.getRaster().getBounds();
    // Note that we steal the data array here, but just for reading
    // so we do not need to mark the DataBuffer dirty...
    int[] data = SunWritableRaster.stealData((DataBufferInt)buf, 0);
    synchronized(SplashScreen.class) {
        checkVisible();
        _update(splashPtr, data, rect.x, rect.y, rect.width, rect.height, scanlineStride);
    }
}
 

import sun.awt.image.SunWritableRaster; //导入方法依赖的package包/类
private BufferedImage toImage(int srcWidth, int srcHeight, int dstWidth, int dstHeight) {
    final BufferedImage bimg = new BufferedImage(dstWidth, dstHeight, BufferedImage.TYPE_INT_ARGB_PRE);
    final DataBufferInt dbi = (DataBufferInt)bimg.getRaster().getDataBuffer();
    final int[] buffer = SunWritableRaster.stealData(dbi, 0);
    nativeCopyNSImageIntoArray(ptr, buffer, srcWidth, srcHeight, dstWidth, dstHeight);
    SunWritableRaster.markDirty(dbi);
    return bimg;
}
 

import sun.awt.image.SunWritableRaster; //导入方法依赖的package包/类
private BufferedImage toImage(int srcWidth, int srcHeight, int dstWidth, int dstHeight) {
    final BufferedImage bimg = new BufferedImage(dstWidth, dstHeight, BufferedImage.TYPE_INT_ARGB_PRE);
    final DataBufferInt dbi = (DataBufferInt)bimg.getRaster().getDataBuffer();
    final int[] buffer = SunWritableRaster.stealData(dbi, 0);
    execute(ptr->nativeCopyNSImageIntoArray(ptr, buffer, srcWidth, srcHeight, dstWidth, dstHeight));
    SunWritableRaster.markDirty(dbi);
    return bimg;
}
 

import sun.awt.image.SunWritableRaster; //导入方法依赖的package包/类
private BufferedImage toImage(int dstWidth, int dstHeight) {
    final BufferedImage bimg = new BufferedImage(dstWidth, dstHeight, BufferedImage.TYPE_INT_ARGB_PRE);
    final DataBufferInt dbi = (DataBufferInt)bimg.getRaster().getDataBuffer();
    final int[] buffer = SunWritableRaster.stealData(dbi, 0);
    nativeCopyNSImageIntoArray(ptr, buffer, dstWidth, dstHeight);
    SunWritableRaster.markDirty(dbi);
    return bimg;
}
 

import sun.awt.image.SunWritableRaster; //导入方法依赖的package包/类
/** @return A BufferedImage created from nsImagePtr, or null. */
public BufferedImage toImage() {
    if (ptr == 0) return null;

    final Dimension2D size = nativeGetNSImageSize(ptr);
    final int w = (int)size.getWidth();
    final int h = (int)size.getHeight();

    final BufferedImage bimg = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB_PRE);
    final DataBufferInt dbi = (DataBufferInt)bimg.getRaster().getDataBuffer();
    final int[] buffer = SunWritableRaster.stealData(dbi, 0);
    nativeCopyNSImageIntoArray(ptr, buffer, w, h);
    SunWritableRaster.markDirty(dbi);
    return bimg;
}
 

import sun.awt.image.SunWritableRaster; //导入方法依赖的package包/类
/**
 * Return true if the BufferedImage argument has non-opaque
 * bits in it and therefore can not be directly rendered by
 * GDI. Return false if the image is opaque. If this function
 * can not tell for sure whether the image has transparent
 * pixels then it assumes that it does.
 */
protected boolean hasTransparentPixels(BufferedImage bufferedImage) {
    ColorModel colorModel = bufferedImage.getColorModel();
    boolean hasTransparency = colorModel == null
        ? true
        : colorModel.getTransparency() != ColorModel.OPAQUE;

    /*
     * For the default INT ARGB check the image to see if any pixels are
     * really transparent. If there are no transparent pixels then the
     * transparency of the color model can be ignored.
     * We assume that IndexColorModel images have already been
     * checked for transparency and will be OPAQUE unless they actually
     * have transparent pixels present.
     */
    if (hasTransparency && bufferedImage != null) {
        if (bufferedImage.getType()==BufferedImage.TYPE_INT_ARGB ||
            bufferedImage.getType()==BufferedImage.TYPE_INT_ARGB_PRE) {
            DataBuffer db =  bufferedImage.getRaster().getDataBuffer();
            SampleModel sm = bufferedImage.getRaster().getSampleModel();
            if (db instanceof DataBufferInt &&
                sm instanceof SinglePixelPackedSampleModel) {
                SinglePixelPackedSampleModel psm =
                    (SinglePixelPackedSampleModel)sm;
                // Stealing the data array for reading only...
                int[] int_data =
                    SunWritableRaster.stealData((DataBufferInt) db, 0);
                int x = bufferedImage.getMinX();
                int y = bufferedImage.getMinY();
                int w = bufferedImage.getWidth();
                int h = bufferedImage.getHeight();
                int stride = psm.getScanlineStride();
                boolean hastranspixel = false;
                for (int j = y; j < y+h; j++) {
                    int yoff = j * stride;
                    for (int i = x; i < x+w; i++) {
                        if ((int_data[yoff+i] & 0xff000000)!=0xff000000 ) {
                            hastranspixel = true;
                            break;
                        }
                    }
                    if (hastranspixel) {
                        break;
                    }
                }
                if (hastranspixel == false) {
                    hasTransparency = false;
                }
            }
        }
    }

    return hasTransparency;
}