colorconvertop.java

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        /* make the transform list */
        theTransforms = new ICC_Transform [nTransforms];

        /* initialize transform get loop */
        if (theProfiles[0].getProfileClass() == ICC_Profile.CLASS_OUTPUT) {
                                        /* if first profile is a printer
                                           render as colorimetric */
            renderState = ICC_Profile.icRelativeColorimetric;
        }
        else {
            renderState = ICC_Profile.icPerceptual; /* render any other
                                                       class perceptually */
        }

        whichTrans = ICC_Transform.In;

        /* get the transforms from each profile */
        for (i1 = 0; i1 < nTransforms; i1++) {
            if (i1 == nTransforms -1) {         /* last profile? */
                whichTrans = ICC_Transform.Out; /* get output transform */
            }
            else {	/* check for abstract profile */
                if ((whichTrans == ICC_Transform.Simulation) &&
                    (theProfiles[i1].getProfileClass () ==
                     ICC_Profile.CLASS_ABSTRACT)) {
            	renderState = ICC_Profile.icPerceptual;
                    whichTrans = ICC_Transform.In;
                }
            }

            theTransforms[i1] = new ICC_Transform (theProfiles[i1],
                                                   renderState, whichTrans);

            /* get this profile's rendering intent to select transform
               from next profile */
            renderState = getRenderingIntent(theProfiles[i1]);

            /* "middle" profiles use simulation transform */
            whichTrans = ICC_Transform.Simulation;
        }

        /* make the net transform */
        thisTransform = new ICC_Transform (theTransforms);

        /* update corresponding source and dest profiles */
        thisSrcProfile = srcProfile;
        thisDestProfile = destProfile;
    }

    /**
     * ColorConverts the image data in the source Raster.
     * If the destination Raster is null, a new Raster will be created.
     * The number of bands in the source and destination Rasters must
     * meet the requirements explained above.  The constructor used to
     * create this ColorConvertOp must have provided enough information
     * to define both source and destination color spaces.  See above.
     * Otherwise, an exception is thrown.
     * @param src the source <code>Raster</code> to be converted
     * @param dest the destination <code>WritableRaster</code>, 
     *        or <code>null</code>
     * @return <code>dest</code> color converted from <code>src</code> 
     *         or a new, converted <code>WritableRaster</code>
     *         if <code>dest</code> is <code>null</code>
     * @exception IllegalArgumentException if the number of source or
     *             destination bands is incorrect, the source or destination
     *             color spaces are undefined, or this op was constructed
     *             with one of the constructors that applies only to
     *             operations on BufferedImages.
     */
    public final WritableRaster filter (Raster src, WritableRaster dest)  {

        if (CSList != null) {
            /* non-ICC case */
            return nonICCRasterFilter(src, dest);
        }
        int nProfiles = profileList.length;
        if (nProfiles < 2) {
            throw new IllegalArgumentException(
                "Source or Destination ColorSpace is undefined");
        }
        if (src.getNumBands() != profileList[0].getNumComponents()) {
            throw new IllegalArgumentException(
                "Numbers of source Raster bands and source color space " +
                "components do not match");
        }
        if (dest == null) {
            dest = createCompatibleDestRaster(src);
        }
        else {
            if (src.getHeight() != dest.getHeight() ||
                src.getWidth() != dest.getWidth()) {
                throw new IllegalArgumentException(
                    "Width or height of Rasters do not match");
            }
            if (dest.getNumBands() !=
                profileList[nProfiles-1].getNumComponents()) {
                throw new IllegalArgumentException(
                    "Numbers of destination Raster bands and destination " +
                    "color space components do not match");
            }
        }

        /* make a new transform if needed */
        if (thisRasterTransform == null) {
            int              i1, whichTrans, renderState;
            ICC_Transform[]  theTransforms;

            /* make the transform list */
            theTransforms = new ICC_Transform [nProfiles];

            /* initialize transform get loop */
            if (profileList[0].getProfileClass() == ICC_Profile.CLASS_OUTPUT) {
                                            /* if first profile is a printer
                                               render as colorimetric */
                renderState = ICC_Profile.icRelativeColorimetric;
            }
            else {
                renderState = ICC_Profile.icPerceptual; /* render any other
                                                           class perceptually */
            }

            whichTrans = ICC_Transform.In;

            /* get the transforms from each profile */
            for (i1 = 0; i1 < nProfiles; i1++) {
                if (i1 == nProfiles -1) {         /* last profile? */
                    whichTrans = ICC_Transform.Out; /* get output transform */
                }
                else {	/* check for abstract profile */
                    if ((whichTrans == ICC_Transform.Simulation) &&
                        (profileList[i1].getProfileClass () ==
                         ICC_Profile.CLASS_ABSTRACT)) {
                	renderState = ICC_Profile.icPerceptual;
                        whichTrans = ICC_Transform.In;
                    }
                }

                theTransforms[i1] = new ICC_Transform (profileList[i1],
                                                       renderState, whichTrans);

                /* get this profile's rendering intent to select transform
                   from next profile */
                renderState = getRenderingIntent(profileList[i1]);

                /* "middle" profiles use simulation transform */
                whichTrans = ICC_Transform.Simulation;
            }

            /* make the net transform */
            thisRasterTransform = new ICC_Transform (theTransforms);
        }

        int srcTransferType = src.getTransferType();
        int dstTransferType = dest.getTransferType();
        if ((srcTransferType == DataBuffer.TYPE_FLOAT) ||
            (srcTransferType == DataBuffer.TYPE_DOUBLE) ||
            (dstTransferType == DataBuffer.TYPE_FLOAT) ||
            (dstTransferType == DataBuffer.TYPE_DOUBLE)) {
            if (srcMinVals == null) {
                getMinMaxValsFromProfiles(profileList[0],
                                          profileList[nProfiles-1]);
            }
            /* color convert the raster */
            thisRasterTransform.colorConvert(src, dest,
                                             srcMinVals, srcMaxVals,
                                             dstMinVals, dstMaxVals);
        } else {
            /* color convert the raster */
            thisRasterTransform.colorConvert(src, dest);
        }


        return dest;
    }

    /**
     * Returns the bounding box of the destination, given this source.
     * Note that this will be the same as the the bounding box of the
     * source.
     * @param src the source <code>BufferedImage</code>
     * @return a <code>Rectangle2D</code> that is the bounding box
     *         of the destination, given the specified <code>src</code>
     */
    public final Rectangle2D getBounds2D (BufferedImage src) {
        return getBounds2D(src.getRaster());
    }

    /**
     * Returns the bounding box of the destination, given this source.
     * Note that this will be the same as the the bounding box of the
     * source.
     * @param src the source <code>Raster</code>
     * @return a <code>Rectangle2D</code> that is the bounding box
     *         of the destination, given the specified <code>src</code>
     */
    public final Rectangle2D getBounds2D (Raster src) {
        /*        return new Rectangle (src.getXOffset(),
                              src.getYOffset(),
                              src.getWidth(), src.getHeight()); */
        return src.getBounds();
    }

    /**
     * Creates a zeroed destination image with the correct size and number of
     * bands, given this source.
     * @param src       Source image for the filter operation.
     * @param destCM    ColorModel of the destination.  If null, an
     *                  appropriate ColorModel will be used.
     * @return a <code>BufferedImage</code> with the correct size and
     * number of bands from the specified <code>src</code>.
     * @throws IllegalArgumentException if <code>destCM</code> is 
     *         <code>null</code> and this <code>ColorConvertOp</code> was 
     *         created without any <code>ICC_Profile</code> or 
     *         <code>ColorSpace</code> defined for the destination
     */
    public BufferedImage createCompatibleDestImage (BufferedImage src,
                                                    ColorModel destCM) {
        ColorSpace cs = null;;
        if (destCM == null) {
            if (CSList == null) {
                /* ICC case */
                int nProfiles = profileList.length;
                if (nProfiles == 0) {
                    throw new IllegalArgumentException(
                        "Destination ColorSpace is undefined");
                }
                ICC_Profile destProfile = profileList[nProfiles - 1];
                cs = new ICC_ColorSpace(destProfile);
            } else {
                /* non-ICC case */
                int nSpaces = CSList.length;
                cs = CSList[nSpaces - 1];
            }
        }
        return createCompatibleDestImage(src, destCM, cs);
    }

    private BufferedImage createCompatibleDestImage(BufferedImage src,
                                                    ColorModel destCM,
                                                    ColorSpace destCS) {
        BufferedImage image;
        if (destCM == null) {
            ColorModel srcCM = src.getColorModel();
            int nbands = destCS.getNumComponents();
            boolean hasAlpha = srcCM.hasAlpha();
            if (hasAlpha) {
               nbands += 1;
            }
            int[] nbits = new int[nbands];
            for (int i = 0; i < nbands; i++) {
                nbits[i] = 8;
            }
            destCM = new ComponentColorModel(destCS, nbits, hasAlpha,
                                             srcCM.isAlphaPremultiplied(),
                                             srcCM.getTransparency(),
                                             DataBuffer.TYPE_BYTE);
        }
        int w = src.getWidth();
        int h = src.getHeight();
        image = new BufferedImage(destCM,
                                  destCM.createCompatibleWritableRaster(w, h),
                                  destCM.isAlphaPremultiplied(), null);
        return image;
    }


    /**
     * Creates a zeroed destination Raster with the correct size and number of
     * bands, given this source.
     * @param src the specified <code>Raster</code>
     * @return a <code>WritableRaster</code> with the correct size and number
     *         of bands from the specified <code>src</code>
     * @throws IllegalArgumentException if this <code>ColorConvertOp</code> 
     *         was created without sufficient information to define the 
     *         <code>dst</code> and <code>src</code> color spaces
     */
    public WritableRaster createCompatibleDestRaster (Raster src) {
        int ncomponents;

        if (CSList != null) {
            /* non-ICC case */
            if (CSList.length != 2) {
                throw new IllegalArgumentException(
                    "Destination ColorSpace is undefined");
            }
            ncomponents = CSList[1].getNumComponents();
        } else {
            /* ICC case */
            int nProfiles = profileList.length;
            if (nProfiles < 2) {
                throw new IllegalArgumentException(
                    "Destination ColorSpace is undefined");
            }
            ncomponents = profileList[nProfiles-1].getNumComponents();
        }

        WritableRaster dest =
            Raster.createInterleavedRaster(DataBuffer.TYPE_BYTE,
                                  src.getWidth(),
                                  src.getHeight(),
                                  ncomponents,
                                  new Point(src.getMinX(), src.getMinY()));
        return dest;
    }

    /**
     * Returns the location of the destination point given a
     * point in the source.  If <code>dstPt</code> is non-null, 
     * it will be used to hold the return value.  Note that 
     * for this class, the destination point will be the same 
     * as the source point.
     * @param srcPt the specified source <code>Point2D</code>
     * @param dstPt the destination <code>Point2D</code>
     * @return <code>dstPt</code> after setting its location to be
     *         the same as <code>srcPt</code>
     */
    public final Point2D getPoint2D (Point2D srcPt, Point2D dstPt) {
        if (dstPt == null) {
            dstPt = new Point2D.Float();
        }
        dstPt.setLocation(srcPt.getX(), srcPt.getY());

        return dstPt;
    }


    /**
     * Returns the RenderingIntent from the specified ICC Profile.
     */
    private int getRenderingIntent (ICC_Profile profile) {
        byte[] header = profile.getData(ICC_Profile.icSigHead);
        int index = ICC_Profile.icHdrRenderingIntent;
        return (((header[index]   & 0xff) << 24) |
                ((header[index+1] & 0xff) << 16) |
                ((header[index+2] & 0xff) <<  8) |
                 (header[index+3] & 0xff));
    }

    /**
     * Returns the rendering hints used by this op.
     * @return the <code>RenderingHints</code> object of this 
     *         <code>ColorConvertOp</code>
     */
    public final RenderingHints getRenderingHints() {
        return hints;
    }

    private final BufferedImage nonICCBIFilter(BufferedImage src,
                                               ColorSpace srcColorSpace,
                                               BufferedImage dst,
                                               ColorSpace dstColorSpace) {

        int w = src.getWidth();
        int h = src.getHeight();
        ICC_ColorSpace ciespace =