bandedsamplemodel.java

gcc的组建

   * @param x The x-coordinate of the pixel rectangle to store in
   * <code>iArray</code>.
   * @param y The y-coordinate of the pixel rectangle to store in
   * <code>iArray</code>.
   * @param w The width in pixels of the rectangle.
   * @param h The height in pixels of the rectangle.
   * @param b The band to retrieve.
   * @param iArray The int array to store the pixels into or null to force
   * creation.
   * @param data The DataBuffer that is the source of the pixel data.
   * @return The primitive array containing the pixel data.
   */
  public int[] getSamples(int x, int y, int w, int h, int b, int[] iArray,
			  DataBuffer data)
  {
    if (iArray == null) iArray = new int[w*h];
    int outOffset = 0;
    int maxX = x + w;
    int maxY = y + h;
    for (int yy = y; yy < maxY; yy++)
      {
	for (int xx = x; xx < maxX; xx++)
	  {
	    int offset = bandOffsets[b] + yy * scanlineStride + xx;
	    iArray[outOffset++] =
	      data.getElem(bankIndices[b], offset);
	  }
      }
    return iArray;	
  }


  /**
   * Set the pixel at x, y to the value in the first element of the primitive
   * array obj.
   *
   * @param x The x-coordinate of the data elements in <code>obj</code>.
   * @param y The y-coordinate of the data elements in <code>obj</code>.
   * @param obj The primitive array containing the data elements to set.
   * @param data The DataBuffer to store the data elements into.
   * @see java.awt.image.SampleModel#setDataElements(int, int, int, int, java.lang.Object, java.awt.image.DataBuffer)
   */
  public void setDataElements(int x, int y, Object obj, DataBuffer data)
  {
    int transferType = getTransferType();
    if (getTransferType() != data.getDataType())
      {
	throw new IllegalArgumentException("transfer type ("+
					   getTransferType()+"), "+
					   "does not match data "+
					   "buffer type (" +
					   data.getDataType() +
					   ").");
      }

    int offset = y * scanlineStride + x;
    
    try
      {
	switch (transferType)
	  {
	  case DataBuffer.TYPE_BYTE:
	    {
	      DataBufferByte out = (DataBufferByte) data;
	      byte[] in = (byte[]) obj;
	      for (int i=0; i < numBands; i++)
		out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
	      return;
	    }
	  case DataBuffer.TYPE_SHORT:
	    {
	      DataBufferShort out = (DataBufferShort) data;
	      short[] in = (short[]) obj;
	      for (int i=0; i < numBands; i++)
		out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
	      return;
	    }
	  case DataBuffer.TYPE_USHORT:
	    {
	      DataBufferUShort out = (DataBufferUShort) data;
	      short[] in = (short[]) obj;
	      for (int i=0; i < numBands; i++)
		out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
	      return;
	    }
	  case DataBuffer.TYPE_INT:
	    {
	      DataBufferInt out = (DataBufferInt) data;
	      int[] in = (int[]) obj;
	      for (int i=0; i < numBands; i++)
		out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
	      return;
	    }
	  case DataBuffer.TYPE_FLOAT:
	    {
	      DataBufferFloat out = (DataBufferFloat) data;
	      float[] in = (float[]) obj;
	      for (int i=0; i < numBands; i++)
		out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
	      return;
	    }
	  case DataBuffer.TYPE_DOUBLE:
	    {
	      DataBufferDouble out = (DataBufferDouble) data;
	      double[] in = (double[]) obj;
	      for (int i=0; i < numBands; i++)
		out.getData(bankIndices[i])[offset + bandOffsets[i]] = in[i];
	      return;
	    }
	  default:
	    throw new ClassCastException("Unsupported data type");
	  }
      }
    catch (ArrayIndexOutOfBoundsException aioobe)
      {
	String msg = "While writing data elements" +
	  ", x="+x+", y="+y+
	  ", width="+width+", height="+height+
	  ", scanlineStride="+scanlineStride+
	  ", offset="+offset+
	  ", data.getSize()="+data.getSize()+
	  ", data.getOffset()="+data.getOffset()+
	  ": " +
	  aioobe;
	throw new ArrayIndexOutOfBoundsException(msg);
      }
    }

  public void setPixel(int x, int y, int[] iArray, DataBuffer data)
  {
    for (int b=0; b < numBands; b++)
      data.setElem(bankIndices[b], bandOffsets[b] + y * scanlineStride + x,
		   iArray[b]);
  }

  public void setPixels(int x, int y, int w, int h, int[] iArray,
			DataBuffer data)
  {
    int inOffset = 0;
    for (int hh = 0; hh < h; hh++)
      {
	for (int ww = 0; ww < w; ww++)
	  {
	    int offset = y * scanlineStride + (x + ww);
	    for (int b=0; b < numBands; b++)
	      data.setElem(bankIndices[b], bandOffsets[b] + offset,
			   iArray[inOffset++]);
	  }
	y++;
      }
  }

  public void setSample(int x, int y, int b, int s, DataBuffer data)
  {
    data.setElem(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, s);
  }
  
  public void setSample(int x, int y, int b, float s, DataBuffer data)
  {
    data.setElemFloat(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, s);
  }
  
  public void setSample(int x, int y, int b, double s, DataBuffer data)
  {
    data.setElemDouble(bankIndices[b], bandOffsets[b] + y * scanlineStride + x, s);
  }
  
  public void setSamples(int x, int y, int w, int h, int b, int[] iArray,
			 DataBuffer data)
  {
    int inOffset = 0;

    switch (getTransferType())
      {
      case DataBuffer.TYPE_BYTE:
	{
	  DataBufferByte out = (DataBufferByte) data;
	  byte[] bank = out.getData(bankIndices[b]);
	  for (int hh = 0; hh < h; hh++)
	    {
	      for (int ww = 0; ww < w; ww++)
		{
		  int offset = bandOffsets[b] + y * scanlineStride + (x + ww);
		  bank[offset] = (byte)iArray[inOffset++];
		}
	      y++;
	    }
	  return;
	}
      case DataBuffer.TYPE_SHORT:
	{
	  DataBufferShort out = (DataBufferShort) data;
	  short[] bank = out.getData(bankIndices[b]);
	  for (int hh = 0; hh < h; hh++)
	    {
	      for (int ww = 0; ww < w; ww++)
		{
		  int offset = bandOffsets[b] + y * scanlineStride + (x + ww);
		  bank[offset] = (short)iArray[inOffset++];
		}
	      y++;
	    }
	  return;
	}
      case DataBuffer.TYPE_USHORT:
	{
	  DataBufferShort out = (DataBufferShort) data;
	  short[] bank = out.getData(bankIndices[b]);
	  for (int hh = 0; hh < h; hh++)
	    {
	      for (int ww = 0; ww < w; ww++)
		{
		  int offset = bandOffsets[b] + y * scanlineStride + (x + ww);
		  bank[offset] = (short)iArray[inOffset++];
		}
	      y++;
	    }
	  return;
	}
      case DataBuffer.TYPE_INT:
	{
	  DataBufferInt out = (DataBufferInt) data;
	  int[] bank = out.getData(bankIndices[b]);
	  for (int hh = 0; hh < h; hh++)
	    {
	      for (int ww = 0; ww < w; ww++)
		{
		  int offset = bandOffsets[b] + y * scanlineStride + (x + ww);
		  bank[offset] = iArray[inOffset++];
		}
	      y++;
	    }
	  return;
	}
      case DataBuffer.TYPE_FLOAT:
      case DataBuffer.TYPE_DOUBLE:
	break;
      default:
	throw new ClassCastException("Unsupported data type");
      }

    // Default implementation probably slower for float and double
    for (int hh = 0; hh < h; hh++)
      {
	for (int ww = 0; ww < w; ww++)
	  {
	    int offset = bandOffsets[b] + y * scanlineStride + (x + ww);
	    data.setElem(bankIndices[b], offset, iArray[inOffset++]);
	  }
	y++;
      }
  }

  /**
   * Creates a String with some information about this SampleModel.
   * @return A String describing this SampleModel.
   * @see java.lang.Object#toString()
   */
  public String toString()
  {
    StringBuffer result = new StringBuffer();
    result.append(getClass().getName());
    result.append("[");
    result.append("scanlineStride=").append(scanlineStride);
    for(int i=0; i < bitMasks.length; i+=1)
    {
      result.append(", mask[").append(i).append("]=0x").append(Integer.toHexString(bitMasks[i]));
    }
    
    result.append("]");
    return result.toString();
  }
}