Java ImageLayout.getColorModel方法代码示例

import javax.media.jai.ImageLayout; //导入方法依赖的package包/类
/**
    * Constructs an AffineNearestBinaryOpImage from a RenderedImage source,
    *
    * @param source a RenderedImage.
    * @param layout an ImageLayout optionally containing the tile grid layout,
    *        SampleModel, and ColorModel, or null.
    * @param interp an Interpolation object to use for resampling
    * @param transform the desired AffineTransform.
    */
   public AffineNearestBinaryOpImage(RenderedImage source,
                                      BorderExtender extender,
                                      Map config,
                                      ImageLayout layout,
                                      AffineTransform transform,
                                      Interpolation interp,
                                      double[] backgroundValues) {
       super(source,
             extender,
             configHelper(config),
             layout,
             transform,
             interp,
             backgroundValues);

       // Propagate source's ColorModel and SampleModel but change tile size.
       if (layout != null) {
           colorModel = layout.getColorModel(source);
       } else {
           colorModel = source.getColorModel();
       }
       sampleModel =
           source.getSampleModel().createCompatibleSampleModel(tileWidth,
                                                               tileHeight);

       // Set the background to color to 1 if the color
       // model specifies that as "black", otherwise 0.
//
       // This cause problem on the background (Bug 4380285): because
       // (1) if the tile does not intersect with the source, zeroed tile(white
       // is created; (2) if the line does not intersect with the source,
       // zeroed-line is created; (3) if the image area does not equal to
       // the whole destination rectangle, some white line will be displayed.
       //
       //if (colorModel.getRGB(1) == 0xff000000) {
       //    black = 1;
       //}
   }
 

import javax.media.jai.ImageLayout; //导入方法依赖的package包/类
/**
    * Constructs a ScaleNearestBinaryOpImage from a RenderedImage source,
    * 
    * @param source a RenderedImage.
    * @param layout an ImageLayout optionally containing the tile grid layout,
    *        SampleModel, and ColorModel, or null.
    * @param xScale scale factor along x axis.
    * @param yScale scale factor along y axis.
    * @param xTrans translation factor along x axis.
    * @param yTrans translation factor along y axis.
    * @param interp an Interpolation object to use for resampling.
    */
   public ScaleNearestBinaryOpImage(RenderedImage source,
                                     BorderExtender extender,
                                     Map config,
                                     ImageLayout layout,
                                     float xScale,
                                     float yScale,
                                     float xTrans,
                                     float yTrans,
                                     Interpolation interp) {
       super(source,
             layout,
             config,
             true,
             extender,
             interp,
             xScale,
             yScale,
             xTrans,
             yTrans);

       // Propagate source's ColorModel
       if (layout != null) {
           colorModel = layout.getColorModel(source);
       } else {
           colorModel = source.getColorModel();
       }
       sampleModel =
           source.getSampleModel().createCompatibleSampleModel(tileWidth,
                                                               tileHeight);

if (invScaleXRational.num > invScaleXRational.denom) {
    invScaleXInt = invScaleXRational.num / invScaleXRational.denom;
    invScaleXFrac = invScaleXRational.num % invScaleXRational.denom;
} else {
    invScaleXInt = 0;
    invScaleXFrac = invScaleXRational.num;
}

if (invScaleYRational.num > invScaleYRational.denom) {
    invScaleYInt = invScaleYRational.num / invScaleYRational.denom;
    invScaleYFrac = invScaleYRational.num % invScaleYRational.denom;
} else {
    invScaleYInt = 0;
    invScaleYFrac = invScaleYRational.num;
}
   }
 

import javax.media.jai.ImageLayout; //导入方法依赖的package包/类
/**
 * Override the dimension specification for the destination such that it
 * has width and height which are equal to non-negative powers of 2.
 */
private static ImageLayout layoutHelper(ImageLayout layout,
                                        RenderedImage source) {
    // Create an ImageLayout or clone the one passed in.
    ImageLayout il = layout == null ?
        new ImageLayout() : (ImageLayout)layout.clone();

    // Force the origin to coincide with that of the source.
    il.setMinX(source.getMinX());
    il.setMinY(source.getMinY());

    // Recalculate the non-unity dimensions to be a positive power of 2.
    // XXX This calculation should not be effected if an implementation
    // of the FCT which supports arbitrary dimensions is used.
    boolean createNewSampleModel = false;
    int w = il.getWidth(source);
    if(w > 1) {
        int newWidth = MathJAI.nextPositivePowerOf2(w);
        if(newWidth != w) {
            il.setWidth(w = newWidth);
            createNewSampleModel = true;
        }
    }
    int h = il.getHeight(source);
    if(h > 1) {
        int newHeight = MathJAI.nextPositivePowerOf2(h);
        if(newHeight != h) {
            il.setHeight(h = newHeight);
            createNewSampleModel = true;
        }
    }

    // Force the image to contain floating point data.
    SampleModel sm = il.getSampleModel(source);
    int dataType = sm.getTransferType();
    if(dataType != DataBuffer.TYPE_FLOAT &&
       dataType != DataBuffer.TYPE_DOUBLE) {
        dataType = DataBuffer.TYPE_FLOAT;
        createNewSampleModel = true;
    }

    // Create a new SampleModel for the destination.
    if(createNewSampleModel) {
        sm = RasterFactory.createComponentSampleModel(sm, dataType, w, h,
                                                      sm.getNumBands());
        il.setSampleModel(sm);

        // Clear the ColorModel mask if needed.
        ColorModel cm = il.getColorModel(null);
        if(cm != null &&
           !JDKWorkarounds.areCompatibleDataModels(sm, cm)) {
            // Clear the mask bit if incompatible.
            il.unsetValid(ImageLayout.COLOR_MODEL_MASK);
        }
    }

    return il;
}
 

import javax.media.jai.ImageLayout; //导入方法依赖的package包/类
private static ImageLayout layoutHelper(Vector sources,
                                        ImageLayout il) {

    ImageLayout layout = (il == null) ? new ImageLayout() : (ImageLayout)il.clone();

    int numSources = sources.size();

    // dest data type is the maximum of transfertype of source image
    // utilizing the monotonicity of data types.

    // dest number of bands = sum of source bands
    int destNumBands = totalNumBands(sources);

    int destDataType = DataBuffer.TYPE_BYTE;  // initialize
    RenderedImage srci = (RenderedImage)sources.get(0);
    Rectangle destBounds = new Rectangle(srci.getMinX(),  srci.getMinY(),
                                         srci.getWidth(), srci.getHeight());                                             
    for ( int i = 0; i < numSources; i++ ) {
        srci = (RenderedImage)sources.get(i);
        destBounds = destBounds.intersection(new Rectangle(srci.getMinX(), srci.getMinY(),
                                             srci.getWidth(), srci.getHeight()));

        int typei = srci.getSampleModel().getTransferType();

        // NOTE: this depends on JDK ordering
        destDataType = typei > destDataType ? typei : destDataType;
    }

    SampleModel sm = layout.getSampleModel((RenderedImage)sources.get(0));

    if ( sm.getNumBands() < destNumBands ) {
        int[] destOffsets = new int[destNumBands];

        for(int i=0; i < destNumBands; i++) {
            destOffsets[i] = i;
        }

        // determine the proper width and height to use
        int destTileWidth = sm.getWidth();
        int destTileHeight = sm.getHeight();
        if(layout.isValid(ImageLayout.TILE_WIDTH_MASK))
        {
            destTileWidth =
                layout.getTileWidth((RenderedImage)sources.get(0));
        }
        if(layout.isValid(ImageLayout.TILE_HEIGHT_MASK))
        {
            destTileHeight =
                layout.getTileHeight((RenderedImage)sources.get(0));
        }
        
        sm = RasterFactory.createComponentSampleModel(sm,
                                                      destDataType,
                                                      destTileWidth,
                                                      destTileHeight,
                                                      destNumBands);


        layout.setSampleModel(sm);
    }

    ColorModel cm = layout.getColorModel(null);

    if ( cm != null &&
         !JDKWorkarounds.areCompatibleDataModels(sm, cm)) {
        // Clear the mask bit if incompatible.
        layout.unsetValid(ImageLayout.COLOR_MODEL_MASK);
    }

    return layout;
}
 

import javax.media.jai.ImageLayout; //导入方法依赖的package包/类
/**
 * Constructs a ScaleBilinearBinaryOpImage from a RenderedImage source,
 * 
 * @param source a RenderedImage.
 * @param layout an ImageLayout optionally containing the tile grid layout,
 *        SampleModel, and ColorModel, or null.
 * @param xScale scale factor along x axis.
 * @param yScale scale factor along y axis.
 * @param xTrans translation factor along x axis.
 * @param yTrans translation factor along y axis.
 * @param interp an Interpolation object to use for resampling.
 */

public ScaleBilinearBinaryOpImage(RenderedImage source,
		    BorderExtender extender,
		    Map config,
		    ImageLayout layout,
		    float xScale,
		    float yScale,
		    float xTrans,
		    float yTrans,
		    Interpolation interp) 
{
  super(source,
  layout, 
  config,
  true,
  extender,
  interp,
  xScale,
  yScale,
  xTrans,
  yTrans);

  subsampleBits =  interp.getSubsampleBitsH ();

  // Numnber of subsampling positions
  one = 1 << subsampleBits;

  //Subsampling related variables
  shift2 = 2 * subsampleBits;
  round2 = 1 << (shift2 - 1);

  // Propagate source's ColorModel
  if (layout != null) 
  {
    colorModel = layout.getColorModel(source);
  } 
  else 
  {
    colorModel = source.getColorModel();
  }
  
  sampleModel = source.getSampleModel().createCompatibleSampleModel(tileWidth, tileHeight);
  
  if (invScaleXRational.num > invScaleXRational.denom) 
  {
    invScaleXInt = invScaleXRational.num / invScaleXRational.denom;
    invScaleXFrac = invScaleXRational.num % invScaleXRational.denom;
  } 
  else 
  {
    invScaleXInt = 0;
    invScaleXFrac = invScaleXRational.num;
  }

  if (invScaleYRational.num > invScaleYRational.denom) 
  {
    invScaleYInt = invScaleYRational.num / invScaleYRational.denom;
    invScaleYFrac = invScaleYRational.num % invScaleYRational.denom;
  } 
  else 
  {
    invScaleYInt = 0;
    invScaleYFrac = invScaleYRational.num;
  }
}
 

import javax.media.jai.ImageLayout; //导入方法依赖的package包/类
/**
 * Force the destination image to have a signed data type.
 */
private static ImageLayout layoutHelper(ImageLayout layout,
                                        RenderedImage source) {
    // Create or clone the layout.
    ImageLayout il = layout == null ?
        new ImageLayout() : (ImageLayout)layout.clone();

    // Get the reference SampleModel.
    SampleModel sm = il.getSampleModel(source);

    // Get the data type.
    int dataType = sm.getTransferType();

    // Determine whether the destination requires a different data type
    // and set it if so.
    boolean createNewSampleModel = false;
    if(dataType == DataBuffer.TYPE_BYTE) {
        dataType = DataBuffer.TYPE_SHORT;
        createNewSampleModel = true;
    } else if(dataType == DataBuffer.TYPE_USHORT) {
        dataType = DataBuffer.TYPE_INT;
        createNewSampleModel = true;
    }

    // Create a new SampleModel for the destination if necessary.
    if(createNewSampleModel) {
        sm = RasterFactory.createComponentSampleModel(sm, dataType,
                                                      sm.getWidth(),
                                                      sm.getHeight(),
                                                      sm.getNumBands());

        il.setSampleModel(sm);

        // Check ColorModel.
        ColorModel cm = il.getColorModel(null);
        if(cm != null &&
           !JDKWorkarounds.areCompatibleDataModels(sm, cm)) {
            // Clear the mask bit if incompatible.
            il.unsetValid(ImageLayout.COLOR_MODEL_MASK);
        }
    }

    return il;
}