llvm-gcc-4.2/libjava/classpath/java/awt/image/RGBImageFilter.java - llvm-archive - Git at Google

 /* RGBImageFilter.java -- Java class for filtering Pixels by RGB values
    Copyright (C) 1999, 2005  Free Software Foundation, Inc.

 This file is part of GNU Classpath.

 GNU Classpath is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2, or (at your option)
 any later version.

 GNU Classpath is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with GNU Classpath; see the file COPYING.  If not, write to the
 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 02110-1301 USA.

 Linking this library statically or dynamically with other modules is
 making a combined work based on this library.  Thus, the terms and
 conditions of the GNU General Public License cover the whole
 combination.

 As a special exception, the copyright holders of this library give you
 permission to link this library with independent modules to produce an
 executable, regardless of the license terms of these independent
 modules, and to copy and distribute the resulting executable under
 terms of your choice, provided that you also meet, for each linked
 independent module, the terms and conditions of the license of that
 module.  An independent module is a module which is not derived from
 or based on this library.  If you modify this library, you may extend
 this exception to your version of the library, but you are not
 obligated to do so.  If you do not wish to do so, delete this
 exception statement from your version. */


 package java.awt.image;

 /**
  * A filter designed to filter images in the default RGBColorModel regardless of
  * the ImageProducer's ColorModel.
  *
  * @author Mark Benvenuto (mcb54@columbia.edu)
  */
 public abstract class RGBImageFilter extends ImageFilter
 {
     protected ColorModel origmodel;

     protected ColorModel newmodel;

     /**
        Specifies whether to apply the filter to the index entries of the
        IndexColorModel. Subclasses should set this to true if the filter
        does not depend on the pixel's coordinate.
      */
     protected boolean canFilterIndexColorModel = false;

     /**
        Construct new RGBImageFilter.
      */
     public RGBImageFilter()
     {
     }

     /**
      * Sets the ColorModel used to filter with. If the specified ColorModel is IndexColorModel
      * and canFilterIndexColorModel is true, we subsitute the ColorModel for a filtered one
      * here and in setPixels whenever the original one appears. Otherwise overrides the default
      * ColorModel of ImageProducer and specifies the default RGBColorModel
      *
      * @param model the color model to be used most often by setPixels
      * @see ColorModel */
     public void setColorModel(ColorModel model)
     {
 	origmodel = model;
 	newmodel = model;

 	if( ( model instanceof IndexColorModel) && canFilterIndexColorModel  ) {
 		newmodel = filterIndexColorModel( (IndexColorModel) model );
 		if (consumer != null)
 		  consumer.setColorModel(newmodel);
 	    }
 	else {
 	  if (consumer != null)
 	    consumer.setColorModel(ColorModel.getRGBdefault());
 	}
     }

     /**
        Registers a new ColorModel to subsitute for the old ColorModel when
        setPixels encounters the a pixel with the old ColorModel. The pixel
        remains unchanged except for a new ColorModel.

        @param oldcm the old ColorModel
        @param newcm the new ColorModel
      */
     public void substituteColorModel(ColorModel oldcm,
 				     ColorModel newcm)
     {
 	origmodel = oldcm;
 	newmodel = newcm;
     }

     /**
        Filters an IndexColorModel through the filterRGB function. Uses
        coordinates of -1 to indicate its filtering an index and not a pixel.

        @param icm an IndexColorModel to filter
      */
     public IndexColorModel filterIndexColorModel(IndexColorModel icm)
     {
 	int len = icm.getMapSize(), rgb;
 	byte reds[] = new byte[len], greens[] = new byte[len], blues[] = new byte[len], alphas[]  = new byte[len];

 	icm.getAlphas( alphas );
 	icm.getReds( reds );
 	icm.getGreens( greens );
 	icm.getBlues( blues );

 	for( int i = 0; i < len; i++ )
 	    {
 		rgb = filterRGB( -1, -1, makeColor ( alphas[i], reds[i], greens[i], blues[i] ) );
 		alphas[i] = (byte)(( 0xff000000 & rgb ) >> 24);
 		reds[i] = (byte)(( 0xff0000 & rgb ) >> 16);
 		greens[i] = (byte)(( 0xff00 & rgb ) >> 8);
 		blues[i] = (byte)(0xff & rgb);
 	    }
 	return new IndexColorModel( icm.getPixelSize(), len, reds, greens, blues, alphas );
     }

     private int makeColor( byte a, byte r, byte g, byte b )
     {
 	return ( 0xff000000 & (a << 24) | 0xff0000 & (r << 16) | 0xff00 & (g << 8) | 0xff & b );
     }

     /**
        This functions filters a set of RGB pixels through filterRGB.

        @param x the x coordinate of the rectangle
        @param y the y coordinate of the rectangle
        @param w the width of the rectangle
        @param h the height of the rectangle
        @param pixels the array of pixel values
        @param offset the index of the first pixels in the <code>pixels</code> array
        @param scansize the width to use in extracting pixels from the <code>pixels</code> array
     */
     public void filterRGBPixels(int x, int y, int w, int h, int[] pixels,
 				int offset, int scansize)
     {
       for (int yp = 0; yp < h; yp++)
 	{
 	  for (int xp = 0; xp < w; xp++)
 	    {
 	      pixels[offset + xp] = filterRGB(xp + x, yp + y, pixels[offset + xp]);
 	    }
 	  offset += scansize;
 	}
     }


     /**
      * If the ColorModel is the same ColorModel which as already converted
      * then it converts it the converted ColorModel. Otherwise it passes the
      * array of pixels through filterRGBpixels.
      *
      * @param x the x coordinate of the rectangle
      * @param y the y coordinate of the rectangle
      * @param w the width of the rectangle
      * @param h the height of the rectangle
      * @param model the <code>ColorModel</code> used to translate the pixels
      * @param pixels the array of pixel values
      * @param offset the index of the first pixels in the <code>pixels</code> array
      * @param scansize the width to use in extracting pixels from the <code>pixels</code> array
      */
     public void setPixels(int x, int y, int w, int h,
                           ColorModel model, byte[] pixels,
                           int offset, int scansize)
     {
 	if(model == origmodel && (model instanceof IndexColorModel) && canFilterIndexColorModel)
 	{
 	  if (consumer != null)
 	    consumer.setPixels(x, y, w, h, newmodel, pixels, offset, scansize);
 	}
 	else
 	{
 	    int intPixels[] =
 		convertColorModelToDefault( x, y, w, h, model, pixels, offset, scansize );
 	    filterRGBPixels( x, y, w, h, intPixels, offset, scansize );
 	    if (consumer != null)
 	      consumer.setPixels(x, y, w, h, ColorModel.getRGBdefault(), intPixels, offset, scansize);
 	}
     }

     /**
      * This function delivers a rectangle of pixels where any
      * pixel(m,n) is stored in the array as an <code>int</code> at
      * index (n * scansize + m + offset).
      *
      * @param x the x coordinate of the rectangle
      * @param y the y coordinate of the rectangle
      * @param w the width of the rectangle
      * @param h the height of the rectangle
      * @param model the <code>ColorModel</code> used to translate the pixels
      * @param pixels the array of pixel values
      * @param offset the index of the first pixels in the <code>pixels</code> array
      * @param scansize the width to use in extracting pixels from the <code>pixels</code> array
      */
     public void setPixels(int x, int y, int w, int h,
                           ColorModel model, int[] pixels,
                           int offset, int scansize)
     {
 	if(model == origmodel && (model instanceof IndexColorModel) && canFilterIndexColorModel)
 	{
 	  if (consumer != null)
 	    consumer.setPixels(x, y, w, h, newmodel, pixels, offset, scansize);
 	}
 	else
 	{
 	    //FIXME: Store the filtered pixels in a separate temporary buffer?
 	  convertColorModelToDefault( x, y, w, h, model, pixels, offset, scansize );
 	  filterRGBPixels( x, y, w, h, pixels, offset, scansize );
 	  if (consumer != null)
 	    consumer.setPixels(x, y, w, h, ColorModel.getRGBdefault(), pixels, offset, scansize);
 	}
     }

     private int[] convertColorModelToDefault(int x, int y, int w, int h,
                                             ColorModel model, byte pixels[],
                                             int offset, int scansize)
     {
 	int intPixels[] = new int[pixels.length];
 	for (int i = 0; i < pixels.length; i++)
 	    intPixels[i] = makeColorbyDefaultCM(model, pixels[i]);
 	return intPixels;
     }

     private void convertColorModelToDefault(int x, int y, int w, int h,
                                             ColorModel model, int pixels[],
                                             int offset, int scansize)
     {
 	for (int i = 0; i < pixels.length; i++)
 	    pixels[i] = makeColorbyDefaultCM(model, pixels[i]);
     }

     private int makeColorbyDefaultCM(ColorModel model, byte rgb)
     {
 	return makeColor( model.getAlpha( rgb ) * 4, model.getRed( rgb ) * 4, model.getGreen( rgb ) * 4, model.getBlue( rgb ) * 4 );
     }

     private int makeColorbyDefaultCM(ColorModel model, int rgb)
     {
 	return makeColor( model.getAlpha( rgb ), model.getRed( rgb ), model.getGreen( rgb ), model.getBlue( rgb ) );
     }

     private int makeColor( int a, int r, int g, int b )
     {
 	return (int)( 0xff000000 & (a << 24) | 0xff0000 & (r << 16) | 0xff00 & (g << 8) | 0xff & b );
     }


     /**
        Filters a single pixel from the default ColorModel.

        @param x x-coordinate
        @param y y-coordinate
        @param rgb color
      */
     public abstract int filterRGB(int x,
 				  int y,
 				  int rgb);
 }
	/* RGBImageFilter.java -- Java class for filtering Pixels by RGB values
	Copyright (C) 1999, 2005 Free Software Foundation, Inc.

	This file is part of GNU Classpath.

	GNU Classpath is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2, or (at your option)
	any later version.

	GNU Classpath is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with GNU Classpath; see the file COPYING. If not, write to the
	Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	02110-1301 USA.

	Linking this library statically or dynamically with other modules is
	making a combined work based on this library. Thus, the terms and
	conditions of the GNU General Public License cover the whole
	combination.

	As a special exception, the copyright holders of this library give you
	permission to link this library with independent modules to produce an
	executable, regardless of the license terms of these independent
	modules, and to copy and distribute the resulting executable under
	terms of your choice, provided that you also meet, for each linked
	independent module, the terms and conditions of the license of that
	module. An independent module is a module which is not derived from
	or based on this library. If you modify this library, you may extend
	this exception to your version of the library, but you are not
	obligated to do so. If you do not wish to do so, delete this
	exception statement from your version. */


	package java.awt.image;

	/**
	* A filter designed to filter images in the default RGBColorModel regardless of
	* the ImageProducer's ColorModel.
	*
	* @author Mark Benvenuto (mcb54@columbia.edu)
	*/
	public abstract class RGBImageFilter extends ImageFilter
	{
	protected ColorModel origmodel;

	protected ColorModel newmodel;

	/**
	Specifies whether to apply the filter to the index entries of the
	IndexColorModel. Subclasses should set this to true if the filter
	does not depend on the pixel's coordinate.
	*/
	protected boolean canFilterIndexColorModel = false;

	/**
	Construct new RGBImageFilter.
	*/
	public RGBImageFilter()
	{
	}

	/**
	* Sets the ColorModel used to filter with. If the specified ColorModel is IndexColorModel
	* and canFilterIndexColorModel is true, we subsitute the ColorModel for a filtered one
	* here and in setPixels whenever the original one appears. Otherwise overrides the default
	* ColorModel of ImageProducer and specifies the default RGBColorModel
	*
	* @param model the color model to be used most often by setPixels
	* @see ColorModel */
	public void setColorModel(ColorModel model)
	{
	origmodel = model;
	newmodel = model;

	if( ( model instanceof IndexColorModel) && canFilterIndexColorModel ) {
	newmodel = filterIndexColorModel( (IndexColorModel) model );
	if (consumer != null)
	consumer.setColorModel(newmodel);
	}
	else {
	if (consumer != null)
	consumer.setColorModel(ColorModel.getRGBdefault());
	}
	}

	/**
	Registers a new ColorModel to subsitute for the old ColorModel when
	setPixels encounters the a pixel with the old ColorModel. The pixel
	remains unchanged except for a new ColorModel.

	@param oldcm the old ColorModel
	@param newcm the new ColorModel
	*/
	public void substituteColorModel(ColorModel oldcm,
	ColorModel newcm)
	{
	origmodel = oldcm;
	newmodel = newcm;
	}

	/**
	Filters an IndexColorModel through the filterRGB function. Uses
	coordinates of -1 to indicate its filtering an index and not a pixel.

	@param icm an IndexColorModel to filter
	*/
	public IndexColorModel filterIndexColorModel(IndexColorModel icm)
	{
	int len = icm.getMapSize(), rgb;
	byte reds[] = new byte[len], greens[] = new byte[len], blues[] = new byte[len], alphas[] = new byte[len];

	icm.getAlphas( alphas );
	icm.getReds( reds );
	icm.getGreens( greens );
	icm.getBlues( blues );

	for( int i = 0; i < len; i++ )
	{
	rgb = filterRGB( -1, -1, makeColor ( alphas[i], reds[i], greens[i], blues[i] ) );
	alphas[i] = (byte)(( 0xff000000 & rgb ) >> 24);
	reds[i] = (byte)(( 0xff0000 & rgb ) >> 16);
	greens[i] = (byte)(( 0xff00 & rgb ) >> 8);
	blues[i] = (byte)(0xff & rgb);
	}
	return new IndexColorModel( icm.getPixelSize(), len, reds, greens, blues, alphas );
	}

	private int makeColor( byte a, byte r, byte g, byte b )
	{
	return ( 0xff000000 & (a << 24) \| 0xff0000 & (r << 16) \| 0xff00 & (g << 8) \| 0xff & b );
	}

	/**
	This functions filters a set of RGB pixels through filterRGB.

	@param x the x coordinate of the rectangle
	@param y the y coordinate of the rectangle
	@param w the width of the rectangle
	@param h the height of the rectangle
	@param pixels the array of pixel values
	@param offset the index of the first pixels in the <code>pixels</code> array
	@param scansize the width to use in extracting pixels from the <code>pixels</code> array
	*/
	public void filterRGBPixels(int x, int y, int w, int h, int[] pixels,
	int offset, int scansize)
	{
	for (int yp = 0; yp < h; yp++)
	{
	for (int xp = 0; xp < w; xp++)
	{
	pixels[offset + xp] = filterRGB(xp + x, yp + y, pixels[offset + xp]);
	}
	offset += scansize;
	}
	}


	/**
	* If the ColorModel is the same ColorModel which as already converted
	* then it converts it the converted ColorModel. Otherwise it passes the
	* array of pixels through filterRGBpixels.
	*
	* @param x the x coordinate of the rectangle
	* @param y the y coordinate of the rectangle
	* @param w the width of the rectangle
	* @param h the height of the rectangle
	* @param model the <code>ColorModel</code> used to translate the pixels
	* @param pixels the array of pixel values
	* @param offset the index of the first pixels in the <code>pixels</code> array
	* @param scansize the width to use in extracting pixels from the <code>pixels</code> array
	*/
	public void setPixels(int x, int y, int w, int h,
	ColorModel model, byte[] pixels,
	int offset, int scansize)
	{
	if(model == origmodel && (model instanceof IndexColorModel) && canFilterIndexColorModel)
	{
	if (consumer != null)
	consumer.setPixels(x, y, w, h, newmodel, pixels, offset, scansize);
	}
	else
	{
	int intPixels[] =
	convertColorModelToDefault( x, y, w, h, model, pixels, offset, scansize );
	filterRGBPixels( x, y, w, h, intPixels, offset, scansize );
	if (consumer != null)
	consumer.setPixels(x, y, w, h, ColorModel.getRGBdefault(), intPixels, offset, scansize);
	}
	}

	/**
	* This function delivers a rectangle of pixels where any
	* pixel(m,n) is stored in the array as an <code>int</code> at
	* index (n * scansize + m + offset).
	*
	* @param x the x coordinate of the rectangle
	* @param y the y coordinate of the rectangle
	* @param w the width of the rectangle
	* @param h the height of the rectangle
	* @param model the <code>ColorModel</code> used to translate the pixels
	* @param pixels the array of pixel values
	* @param offset the index of the first pixels in the <code>pixels</code> array
	* @param scansize the width to use in extracting pixels from the <code>pixels</code> array
	*/
	public void setPixels(int x, int y, int w, int h,
	ColorModel model, int[] pixels,
	int offset, int scansize)
	{
	if(model == origmodel && (model instanceof IndexColorModel) && canFilterIndexColorModel)
	{
	if (consumer != null)
	consumer.setPixels(x, y, w, h, newmodel, pixels, offset, scansize);
	}
	else
	{
	//FIXME: Store the filtered pixels in a separate temporary buffer?
	convertColorModelToDefault( x, y, w, h, model, pixels, offset, scansize );
	filterRGBPixels( x, y, w, h, pixels, offset, scansize );
	if (consumer != null)
	consumer.setPixels(x, y, w, h, ColorModel.getRGBdefault(), pixels, offset, scansize);
	}
	}

	private int[] convertColorModelToDefault(int x, int y, int w, int h,
	ColorModel model, byte pixels[],
	int offset, int scansize)
	{
	int intPixels[] = new int[pixels.length];
	for (int i = 0; i < pixels.length; i++)
	intPixels[i] = makeColorbyDefaultCM(model, pixels[i]);
	return intPixels;
	}

	private void convertColorModelToDefault(int x, int y, int w, int h,
	ColorModel model, int pixels[],
	int offset, int scansize)
	{
	for (int i = 0; i < pixels.length; i++)
	pixels[i] = makeColorbyDefaultCM(model, pixels[i]);
	}

	private int makeColorbyDefaultCM(ColorModel model, byte rgb)
	{
	return makeColor( model.getAlpha( rgb ) * 4, model.getRed( rgb ) * 4, model.getGreen( rgb ) * 4, model.getBlue( rgb ) * 4 );
	}

	private int makeColorbyDefaultCM(ColorModel model, int rgb)
	{
	return makeColor( model.getAlpha( rgb ), model.getRed( rgb ), model.getGreen( rgb ), model.getBlue( rgb ) );
	}

	private int makeColor( int a, int r, int g, int b )
	{
	return (int)( 0xff000000 & (a << 24) \| 0xff0000 & (r << 16) \| 0xff00 & (g << 8) \| 0xff & b );
	}


	/**
	Filters a single pixel from the default ColorModel.

	@param x x-coordinate
	@param y y-coordinate
	@param rgb color
	*/
	public abstract int filterRGB(int x,
	int y,
	int rgb);
	}