icc_profile.java

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     */
    public static final int icSigPs2CRD1Tag       = 0x70736431;    /* 'psd1' */

    /**
     * ICC Profile Tag Signature: 'psd2'.
     */
    public static final int icSigPs2CRD2Tag       = 0x70736432;    /* 'psd2' */

    /**
     * ICC Profile Tag Signature: 'psd3'.
     */
    public static final int icSigPs2CRD3Tag       = 0x70736433;    /* 'psd3' */

    /**
     * ICC Profile Tag Signature: 'ps2s'.
     */
    public static final int icSigPs2CSATag        = 0x70733273;    /* 'ps2s' */

    /**
     * ICC Profile Tag Signature: 'ps2i'.
     */
    public static final int icSigPs2RenderingIntentTag = 0x70733269;
                                                                   /* 'ps2i' */

    /**
     * ICC Profile Tag Signature: 'rXYZ'.
     */
    public static final int icSigRedColorantTag   = 0x7258595A;    /* 'rXYZ' */

    /**
     * ICC Profile Tag Signature: 'rTRC'.
     */
    public static final int icSigRedTRCTag        = 0x72545243;    /* 'rTRC' */

    /**
     * ICC Profile Tag Signature: 'scrd'.
     */
    public static final int icSigScreeningDescTag = 0x73637264;    /* 'scrd' */

    /**
     * ICC Profile Tag Signature: 'scrn'.
     */
    public static final int icSigScreeningTag     = 0x7363726E;    /* 'scrn' */

    /**
     * ICC Profile Tag Signature: 'tech'.
     */
    public static final int icSigTechnologyTag    = 0x74656368;    /* 'tech' */

    /**
     * ICC Profile Tag Signature: 'bfd '.
     */
    public static final int icSigUcrBgTag         = 0x62666420;    /* 'bfd ' */

    /**
     * ICC Profile Tag Signature: 'vued'.
     */
    public static final int icSigViewingCondDescTag = 0x76756564;  /* 'vued' */

    /**
     * ICC Profile Tag Signature: 'view'.
     */
    public static final int icSigViewingConditionsTag = 0x76696577;/* 'view' */

    /**
     * ICC Profile Tag Signature: 'chrm'.
     */
    public static final int icSigChromaticityTag  = 0x6368726d;    /* 'chrm' */


    /**
     * ICC Profile Header Location: profile size in bytes.
     */
    public static final int icHdrSize         = 0;  /* Profile size in bytes */

    /**
     * ICC Profile Header Location: CMM for this profile.
     */
    public static final int icHdrCmmId        = 4;  /* CMM for this profile */

    /**
     * ICC Profile Header Location: format version number.
     */
    public static final int icHdrVersion      = 8;  /* Format version number */

    /**
     * ICC Profile Header Location: type of profile.
     */
    public static final int icHdrDeviceClass  = 12; /* Type of profile */

    /**
     * ICC Profile Header Location: color space of data.
     */
    public static final int icHdrColorSpace   = 16; /* Color space of data */

    /**
     * ICC Profile Header Location: PCS - XYZ or Lab only.
     */
    public static final int icHdrPcs          = 20; /* PCS - XYZ or Lab only */

    /**
     * ICC Profile Header Location: date profile was created.
     */
    public static final int icHdrDate       = 24; /* Date profile was created */

    /**
     * ICC Profile Header Location: icMagicNumber.
     */
    public static final int icHdrMagic        = 36; /* icMagicNumber */

    /**
     * ICC Profile Header Location: primary platform.
     */
    public static final int icHdrPlatform     = 40; /* Primary Platform */

    /**
     * ICC Profile Header Location: various bit settings.
     */
    public static final int icHdrFlags        = 44; /* Various bit settings */

    /**
     * ICC Profile Header Location: device manufacturer.
     */
    public static final int icHdrManufacturer = 48; /* Device manufacturer */

    /**
     * ICC Profile Header Location: device model number.
     */
    public static final int icHdrModel        = 52; /* Device model number */

    /**
     * ICC Profile Header Location: device attributes.
     */
    public static final int icHdrAttributes   = 56; /* Device attributes */

    /**
     * ICC Profile Header Location: rendering intent.
     */
    public static final int icHdrRenderingIntent = 64; /* Rendering intent */

    /**
     * ICC Profile Header Location: profile illuminant.
     */
    public static final int icHdrIlluminant   = 68; /* Profile illuminant */

    /**
     * ICC Profile Header Location: profile creator.
     */
    public static final int icHdrCreator      = 80; /* Profile creator */


    /**
     * ICC Profile Constant: tag type signaturE.
     */
    public static final int icTagType          = 0;    /* tag type signature */

    /**
     * ICC Profile Constant: reserved.
     */
    public static final int icTagReserved      = 4;    /* reserved */

    /**
     * ICC Profile Constant: curveType count.
     */
    public static final int icCurveCount       = 8;    /* curveType count */

    /**
     * ICC Profile Constant: curveType data.
     */
    public static final int icCurveData        = 12;   /* curveType data */

    /**
     * ICC Profile Constant: XYZNumber X.
     */
    public static final int icXYZNumberX       = 8;    /* XYZNumber X */


    /**
     * Constructs an ICC_Profile object with a given ID.
     */
    ICC_Profile(long ID) {
        this.ID = ID;
    }


    /**
     * Constructs an ICC_Profile object whose loading will be deferred.
     * The ID will be 0 until the profile is loaded.
     */
    ICC_Profile(ProfileDeferralInfo pdi) {
        this.deferralInfo = pdi;
        this.profileActivator = new ProfileActivator() {
            public void activate() {
                activateDeferredProfile();
            }
        };
        ProfileDeferralMgr.registerDeferral(this.profileActivator);
    }


    /**
     * Frees the resources associated with an ICC_Profile object.
     */
    protected void finalize () {
        if (ID != 0) {
            CMM.checkStatus(CMM.cmmFreeProfile(ID));
        } else if (profileActivator != null) {
            ProfileDeferralMgr.unregisterDeferral(profileActivator);
        }
    }


    /**
     * Constructs an ICC_Profile object corresponding to the data in
     * a byte array.  Throws an IllegalArgumentException if the data
     * does not correspond to a valid ICC Profile.
     * @param data the specified ICC Profile data
     * @return an <code>ICC_Profile</code> object corresponding to
     *          the data in the specified <code>data</code> array.
     */
    public static ICC_Profile getInstance(byte[] data) {
    ICC_Profile thisProfile;

        long[] theID = new long [1];

        if (ProfileDeferralMgr.deferring) {
            ProfileDeferralMgr.activateProfiles();
        }
        
        try {
            CMM.checkStatus(CMM.cmmLoadProfile(data, theID));
        } catch (CMMException c) {
            throw new IllegalArgumentException("Invalid ICC Profile Data");
        }

        try {
            if ((getColorSpaceType (theID[0]) == ColorSpace.TYPE_GRAY) &&
                (getData (theID[0], icSigMediaWhitePointTag) != null) &&
                (getData (theID[0], icSigGrayTRCTag) != null)) {
                thisProfile = new ICC_ProfileGray (theID[0]);
            }
            else if ((getColorSpaceType (theID[0]) == ColorSpace.TYPE_RGB) &&
                (getData (theID[0], icSigMediaWhitePointTag) != null) &&
                (getData (theID[0], icSigRedColorantTag) != null) &&
                (getData (theID[0], icSigGreenColorantTag) != null) &&
                (getData (theID[0], icSigBlueColorantTag) != null) &&
                (getData (theID[0], icSigRedTRCTag) != null) &&
                (getData (theID[0], icSigGreenTRCTag) != null) &&
                (getData (theID[0], icSigBlueTRCTag) != null)) {
                thisProfile = new ICC_ProfileRGB (theID[0]);
            }
            else {
                thisProfile = new ICC_Profile (theID[0]);
            }
        } catch (CMMException c) {
            thisProfile = new ICC_Profile (theID[0]);
        }
        return thisProfile;
    }



    /**
     * Constructs an ICC_Profile corresponding to one of the specific color
     * spaces defined by the ColorSpace class (for example CS_sRGB).
     * Throws an IllegalArgumentException if cspace is not one of the
     * defined color spaces.
     *   
     * @param cspace the type of color space to create a profile for.
     * The specified type is one of the color
     * space constants defined in the  <CODE>ColorSpace</CODE> class.
     *       
     * @return an <code>ICC_Profile</code> object corresponding to
     *          the specified <code>ColorSpace</code> type.
     * @exception IllegalArgumentException If <CODE>cspace</CODE> is not
     * one of the predefined color space types.
     */
    public static ICC_Profile getInstance (int cspace)
    {
    ICC_Profile thisProfile = null;
    String fileName;

        try {
            switch (cspace) {
            case ColorSpace.CS_sRGB:
                if (sRGBprofile == null) {
                    sRGBprofile = getDeferredInstance(
                        new ProfileDeferralInfo("sRGB.pf", ColorSpace.TYPE_RGB,
                                                3, CLASS_DISPLAY)); 
                }
                thisProfile = sRGBprofile;

                break;

            case ColorSpace.CS_CIEXYZ:
                if (XYZprofile == null) {
                    XYZprofile = getInstance ("CIEXYZ.pf");
                }
                thisProfile = XYZprofile;

                break;

            case ColorSpace.CS_PYCC:
                if (PYCCprofile == null) {
                    PYCCprofile = getInstance ("PYCC.pf");
                }
                thisProfile = PYCCprofile;

                break;

            case ColorSpace.CS_GRAY:
                if (GRAYprofile == null) {
                    GRAYprofile = getInstance ("GRAY.pf");
                }
                thisProfile = GRAYprofile;

                break;

            case ColorSpace.CS_LINEAR_RGB:
                if (LINEAR_RGBprofile == null) {
                    LINEAR_RGBprofile = getInstance ("LINEAR_RGB.pf");
                }
                thisProfile = LINEAR_RGBprofile;

                break;

            default:
                throw new IllegalArgumentException("Unknown color space");
            }
        } catch (IOException e) {
            throw new IllegalArgumentException("Can't load standard profile");
        }

        return thisProfile;
    }


    /**
     * Constructs an ICC_Profile corresponding to the data in a file.
     * fileName may be an absolute or a relative file specification.
     * Relative file names are looked for in several places: first, relative
     * to any directories specified by the java.iccprofile.path property;
     * second, relative to any directories specified by the java.class.path
     * property; finally, in a directory used to store profiles always
     * available, such as the profile for sRGB.  Built-in profiles use .pf as
     * the file name extension for profiles, e.g. sRGB.pf.
     * This method throws an IOException if the specified file cannot be
     * opened or if an I/O error occurs while reading the file.  It throws
     * an IllegalArgumentException if the file does not contain valid ICC
     * Profile data.
     * @param fileName The file that contains the data for the profile.
     *
     * @return an <code>ICC_Profile</code> object corresponding to
     *          the data in the specified file.
     * @exception IOException If the specified file cannot be opened or
     * an I/O error occurs while reading the file.
     *   
     * @exception IllegalArgumentException If the file does not
     * contain valid ICC Profile data. 
     */
    public static ICC_Profile getInstance(String fileName) throws IOException {
    ICC_Profile thisProfile;
    FileInputStream fis;

        if ((fis = openProfile(fileName)) == null) {
            throw new IOException("Cannot open file " + fileName);
        }

        thisProfile = getInstance(fis);

        fis.close();    /* close the file */
    
        return thisProfile;
    }


    /**
     * Constructs an ICC_Profile corresponding to the data in an InputStream.
     * This method throws an IllegalArgumentException if the stream does not
     * contain valid ICC Profile data.  It throws an IOException if an I/O
     * error occurs while reading the stream.
     * @param s The input stream from which to read the profile data.
     *
     * @return an <CODE>ICC_Profile</CODE> object corresponding to the
     *     data in the specified <code>InputStream</code>.
     *
     * @exception IOException If an I/O error occurs while reading the stream.
     *   
     * @exception IllegalArgumentException If the stream does not
     * contain valid ICC Profile data.
     */
    public static ICC_Profile getInstance(InputStream s) throws IOException {
    byte profileData[];

        if (s instanceof ProfileDeferralInfo) {
            /* hack to detect profiles whose loading can be deferred */
            return getDeferredInstance((ProfileDeferralInfo) s);
        }

        if ((profileData = getProfileDataFromStream(s)) == null) {
            throw new IllegalArgumentException("Invalid ICC Profile Data");
        }

        return getInstance(profileData);
    }


    static byte[] getProfileDataFromStream(InputStream s) throws IOException {
    byte profileData[];
    int profileSize;

        byte header[] = new byte[128];
        int bytestoread = 128;
        int bytesread = 0;
        int n;

        while (bytestoread != 0) {
            if ((n = s.read(header, bytesread, bytestoread)) < 0) {
                return null;
            }
            bytesread += n;
            bytestoread -= n;
        }
        if (header[36] != 0x61 || header[37] != 0x63 ||
            header[38] != 0x73 || header[39] != 0x70) {
            return null;   /* not a valid profile */
        }
        profileSize = ((header[0] & 0xff) << 24) |
                      ((header[1] & 0xff) << 16) |
                      ((header[2] & 0xff) <<  8) |
                       (header[3] & 0xff);
        profileData = new byte[profileSize];
        System.arraycopy(header, 0, profileData, 0, 128);
        bytestoread = profileSize - 128;
        bytesread = 128;
        while (bytestoread != 0) {
            if ((n = s.read(profileData, bytesread, bytestoread)) < 0) {
                return null;
            }
            bytesread += n;
            bytestoread -= n;
        }

        return profileData;
    }


    /**
     * Constructs an ICC_Profile for which the actual loading of the
     * profile data from a file and the initialization of the CMM should
     * be deferred as long as possible.
     */
    static ICC_Profile getDeferredInstance(ProfileDeferralInfo pdi)
        throws IOException {

        if (!ProfileDeferralMgr.deferring) {
            return getInstance(pdi.filename);
        }
        if (pdi.colorSpaceType == ColorSpace.TYPE_RGB) {
            return new ICC_ProfileRGB(pdi);
        } else if (pdi.colorSpaceType == ColorSpace.TYPE_GRAY) {
            return new ICC_ProfileGray(pdi);
        } else {
            return new ICC_Profile(pdi);
        }
    }


    void activateDeferredProfile() {
    long[] theID = new long [1];
    byte profileData[];
    FileInputStream fis;