예제 #1
0
  private BufferedImage convert(BufferedImage image, int imageType) {
    if (image.getType() == imageType) {
      return image;
    }

    int w = image.getWidth();
    int h = image.getHeight();
    BufferedImage newImg = new BufferedImage(w, h, imageType);
    ColorSpace srcSpace = image.getColorModel().getColorSpace();
    ColorSpace newSpace = newImg.getColorModel().getColorSpace();
    ColorConvertOp convert = new ColorConvertOp(srcSpace, newSpace, null);
    convert.filter(image, newImg);
    return newImg;
  }
예제 #2
0
  public BufferedImage read(int imageIndex, ImageReadParam param) throws IOException {
    checkIndex(imageIndex);
    readHeader();

    if (iis == null) throw new IllegalStateException("input is null");

    BufferedImage img;

    clearAbortRequest();
    processImageStarted(imageIndex);

    if (param == null) param = getDefaultReadParam();

    sourceRegion = new Rectangle(0, 0, 0, 0);
    destinationRegion = new Rectangle(0, 0, 0, 0);

    computeRegions(
        param, this.width, this.height, param.getDestination(), sourceRegion, destinationRegion);

    scaleX = param.getSourceXSubsampling();
    scaleY = param.getSourceYSubsampling();

    // If the destination band is set used it
    sourceBands = param.getSourceBands();
    destBands = param.getDestinationBands();

    seleBand = (sourceBands != null) && (destBands != null);
    noTransform = destinationRegion.equals(new Rectangle(0, 0, width, height)) || seleBand;

    if (!seleBand) {
      sourceBands = new int[colorPlanes];
      destBands = new int[colorPlanes];
      for (int i = 0; i < colorPlanes; i++) destBands[i] = sourceBands[i] = i;
    }

    // If the destination is provided, then use it.  Otherwise, create new one
    bi = param.getDestination();

    // Get the image data.
    WritableRaster raster = null;

    if (bi == null) {
      if (sampleModel != null && colorModel != null) {
        sampleModel =
            sampleModel.createCompatibleSampleModel(
                destinationRegion.width + destinationRegion.x,
                destinationRegion.height + destinationRegion.y);
        if (seleBand) sampleModel = sampleModel.createSubsetSampleModel(sourceBands);
        raster = Raster.createWritableRaster(sampleModel, new Point(0, 0));
        bi = new BufferedImage(colorModel, raster, false, null);
      }
    } else {
      raster = bi.getWritableTile(0, 0);
      sampleModel = bi.getSampleModel();
      colorModel = bi.getColorModel();

      noTransform &= destinationRegion.equals(raster.getBounds());
    }

    byte bdata[] = null; // buffer for byte data

    if (sampleModel.getDataType() == DataBuffer.TYPE_BYTE)
      bdata = (byte[]) ((DataBufferByte) raster.getDataBuffer()).getData();

    readImage(bdata);

    if (abortRequested()) processReadAborted();
    else processImageComplete();

    return bi;
  }