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/* ProfileHeader.java -- Encapsules ICC Profile header data

   Copyright (C) 2004 Free Software Foundation

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 gnu.java.awt.color;

import java.awt.color.ColorSpace;

import java.awt.color.ICC_Profile;

import java.nio.ByteBuffer;

/**

 * Header, abstracts and validates the header data.

 *

 * @author Sven de Marothy

 */

public class ProfileHeader

{

  /**

   * Magic identifier (ASCII 'acsp')

   */

  private static final int icMagicNumber = 0x61637370;

  /**

   * Mapping from ICC Profile signatures to ColorSpace types

   */

  private static final int[] csTypeMap =

                                         {

                                           ICC_Profile.icSigXYZData,

                                           ColorSpace.TYPE_XYZ,

                                           ICC_Profile.icSigLabData,

                                           ColorSpace.TYPE_Lab,

                                           ICC_Profile.icSigLuvData,

                                           ColorSpace.TYPE_Luv,

                                           ICC_Profile.icSigYCbCrData,

                                           ColorSpace.TYPE_YCbCr,

                                           ICC_Profile.icSigYxyData,

                                           ColorSpace.TYPE_Yxy,

                                           ICC_Profile.icSigRgbData,

                                           ColorSpace.TYPE_RGB,

                                           ICC_Profile.icSigGrayData,

                                           ColorSpace.TYPE_GRAY,

                                           ICC_Profile.icSigHsvData,

                                           ColorSpace.TYPE_HSV,

                                           ICC_Profile.icSigHlsData,

                                           ColorSpace.TYPE_HLS,

                                           ICC_Profile.icSigCmykData,

                                           ColorSpace.TYPE_CMYK,

                                           ICC_Profile.icSigCmyData,

                                           ColorSpace.TYPE_CMY,

                                           ICC_Profile.icSigSpace2CLR,

                                           ColorSpace.TYPE_2CLR,

                                           ICC_Profile.icSigSpace3CLR,

                                           ColorSpace.TYPE_3CLR,

                                           ICC_Profile.icSigSpace4CLR,

                                           ColorSpace.TYPE_4CLR,

                                           ICC_Profile.icSigSpace5CLR,

                                           ColorSpace.TYPE_5CLR,

                                           ICC_Profile.icSigSpace6CLR,

                                           ColorSpace.TYPE_6CLR,

                                           ICC_Profile.icSigSpace7CLR,

                                           ColorSpace.TYPE_7CLR,

                                           ICC_Profile.icSigSpace8CLR,

                                           ColorSpace.TYPE_8CLR,

                                           ICC_Profile.icSigSpace9CLR,

                                           ColorSpace.TYPE_9CLR,

                                           ICC_Profile.icSigSpaceACLR,

                                           ColorSpace.TYPE_ACLR,

                                           ICC_Profile.icSigSpaceBCLR,

                                           ColorSpace.TYPE_BCLR,

                                           ICC_Profile.icSigSpaceCCLR,

                                           ColorSpace.TYPE_CCLR,

                                           ICC_Profile.icSigSpaceDCLR,

                                           ColorSpace.TYPE_DCLR,

                                           ICC_Profile.icSigSpaceECLR,

                                           ColorSpace.TYPE_ECLR,

                                           ICC_Profile.icSigSpaceFCLR,

                                           ColorSpace.TYPE_FCLR

                                         };

  /**

   * Size of an ICC header (128 bytes)

   */

  public static final int HEADERSIZE = 128;

  /**

   * Mapping of ICC class signatures to profile class constants

   */

  private static final int[] classMap =

                                        {

                                          ICC_Profile.icSigInputClass,

                                          ICC_Profile.CLASS_INPUT,

                                          ICC_Profile.icSigDisplayClass,

                                          ICC_Profile.CLASS_DISPLAY,

                                          ICC_Profile.icSigOutputClass,

                                          ICC_Profile.CLASS_OUTPUT,

                                          ICC_Profile.icSigLinkClass,

                                          ICC_Profile.CLASS_DEVICELINK,

                                          ICC_Profile.icSigColorSpaceClass,

                                          ICC_Profile.CLASS_COLORSPACECONVERSION,

                                          ICC_Profile.icSigAbstractClass,

                                          ICC_Profile.CLASS_ABSTRACT,

                                          ICC_Profile.icSigNamedColorClass,

                                          ICC_Profile.CLASS_NAMEDCOLOR

                                        };

  private int size;

  private int cmmId;

  // Major/Minor version, The ICC-1998 spec is major v2

  private int majorVersion;

  // Major/Minor version, The ICC-1998 spec is major v2

  private int minorVersion;

  private int profileClass; // profile device class

  private int colorSpace; // data color space type

  private int profileColorSpace; // profile connection space (PCS) type

  private byte[] timestamp; // original creation timestamp

  private int platform; // platform signature

  private int flags; // flags

  private int magic; // magic number.

  private int manufacturerSig; // manufacturer sig

  private int modelSig; // model sig

  private byte[] attributes; // Attributes

  private int intent; // rendering intent

  private byte[] illuminant; // illuminant info (Coordinates of D50 in the PCS)

  private int creatorSig; // Creator sig (same type as manufacturer)

  /**

   * Creates a 'default' header for use with our predefined profiles.

   * Note the device and profile color spaces are not set.

   */

  public ProfileHeader()

  {

    creatorSig = 0;

    intent = 0;

    modelSig = manufacturerSig = (int) 0x6E6f6E65; // 'none'

    magic = icMagicNumber;

    cmmId = 0;

    platform = 0; // no preferred platform

    timestamp = new byte[8];

    majorVersion = 2;

    minorVersion = 0x10;

    flags = 0;

    // D50 in XYZ format (encoded)

    illuminant = new byte[]

                 {

                   (byte) 0x00, (byte) 0x00, (byte) 0xf6, (byte) 0xd6,

                   (byte) 0x00, (byte) 0x01, (byte) 0x00, (byte) 0x00,

                   (byte) 0x00, (byte) 0x00, (byte) 0xd3, (byte) 0x2d

                 };

    attributes = new byte[8];

    profileClass = ICC_Profile.CLASS_DISPLAY;

  }

  /**

   * Creates a header from profile data. Only the header portion (128 bytes)

   * is read, so the array passed need not be the full profile.

   */

  public ProfileHeader(byte[] data)

  {

    ByteBuffer buf = ByteBuffer.wrap(data);

    // Get size (the sign bit shouldn't matter.

    // A valid profile can never be +2Gb)

    size = buf.getInt(ICC_Profile.icHdrSize);

    // CMM ID

    cmmId = buf.getInt(ICC_Profile.icHdrCmmId);

    // Version number

    majorVersion = (int) (data[ICC_Profile.icHdrVersion]);

    minorVersion = (int) (data[ICC_Profile.icHdrVersion + 1]);

    // Profile/Device class

    int classSig = buf.getInt(ICC_Profile.icHdrDeviceClass);

    profileClass = -1;

    for (int i = 0; i < classMap.length; i += 2)

      if (classMap[i] == classSig)

        {

          profileClass = classMap[i + 1];

          break;

        }

    // get the data color space

    int csSig = buf.getInt(ICC_Profile.icHdrColorSpace);

    colorSpace = -1;

    for (int i = 0; i < csTypeMap.length; i += 2)

      if (csTypeMap[i] == csSig)

        {

          colorSpace = csTypeMap[i + 1];

          break;

        }

    // get the profile color space (PCS), must be xyz or lab except

    // for device-link-class profiles

    int pcsSig = buf.getInt(ICC_Profile.icHdrPcs);

    profileColorSpace = -1;

    if (profileClass != ICC_Profile.CLASS_DEVICELINK)

      {

        if (pcsSig == ICC_Profile.icSigXYZData)

          profileColorSpace = ColorSpace.TYPE_XYZ;

        if (pcsSig == ICC_Profile.icSigLabData)

          profileColorSpace = ColorSpace.TYPE_Lab;

      }

    else

      {

        for (int i = 0; i < csTypeMap.length; i += 2)

          if (csTypeMap[i] == pcsSig)

            {

              profileColorSpace = csTypeMap[i + 1];

              break;

            }

      }

    // creation timestamp

    timestamp = new byte[8];

    System.arraycopy(data, ICC_Profile.icHdrDate, timestamp, 0, 8);

    // magic number

    magic = buf.getInt(ICC_Profile.icHdrMagic);

    //  platform info

    platform = buf.getInt(ICC_Profile.icHdrPlatform);

    // get flags

    flags = buf.getInt(ICC_Profile.icHdrFlags);

    // get manufacturer sign

    manufacturerSig = buf.getInt(ICC_Profile.icHdrManufacturer);

    // get header model

    modelSig = buf.getInt(ICC_Profile.icHdrModel);

    // attributes

    attributes = new byte[8];

    System.arraycopy(data, ICC_Profile.icHdrAttributes, attributes, 0, 8);

    // rendering intent

    intent = buf.getInt(ICC_Profile.icHdrRenderingIntent);

    // illuminant info

    illuminant = new byte[12];

    System.arraycopy(data, ICC_Profile.icHdrIlluminant, illuminant, 0, 12);

    // Creator signature

    creatorSig = buf.getInt(ICC_Profile.icHdrCreator);

    // The rest of the header (Total size: 128 bytes) is unused..

  }

  /**

   * Verify that the header is valid

   * @param size equals the file size if it is to be verified, -1 otherwise

   * @throws IllegalArgumentException if the header is found to be invalid.

   */

  public void verifyHeader(int size) throws IllegalArgumentException

  {

    // verify size

    if (size != -1 && this.size != size)

      throw new IllegalArgumentException("Invalid profile length:" + size);

    // Check version number

    if (majorVersion != 2)

      throw new IllegalArgumentException("Wrong major version number:"

                                         + majorVersion);

    // Profile/Device class

    if (profileClass == -1)

      throw new IllegalArgumentException("Invalid profile/device class");

    // get the data color space

    if (colorSpace == -1)

      throw new IllegalArgumentException("Invalid colorspace");

    // profile color space

    if (profileColorSpace == -1)

      throw new IllegalArgumentException("Invalid PCS.");

    // check magic number

    if (magic != icMagicNumber)

      throw new IllegalArgumentException("Invalid magic number!");

  }

  /**

   * Creates a header, setting the header file size at the same time.

   * @param size the profile file size.

   */

  public byte[] getData(int size)

  {

    byte[] data = new byte[HEADERSIZE];

    ByteBuffer buf = ByteBuffer.wrap(data);

    buf.putInt(ICC_Profile.icHdrSize, size);

    buf.putInt(ICC_Profile.icHdrCmmId, cmmId);

    buf.putShort(ICC_Profile.icHdrVersion,

                 (short) (majorVersion << 8 | minorVersion));

    for (int i = 1; i < classMap.length; i += 2)

      if (profileClass == classMap[i])

        buf.putInt(ICC_Profile.icHdrDeviceClass, classMap[i - 1]);

    for (int i = 1; i < csTypeMap.length; i += 2)

      if (csTypeMap[i] == colorSpace)

        buf.putInt(ICC_Profile.icHdrColorSpace, csTypeMap[i - 1]);

    for (int i = 1; i < csTypeMap.length; i += 2)

      if (csTypeMap[i] == profileColorSpace)

        buf.putInt(ICC_Profile.icHdrPcs, csTypeMap[i - 1]);

    System.arraycopy(timestamp, 0, data, ICC_Profile.icHdrDate,

                     timestamp.length);

    buf.putInt(ICC_Profile.icHdrMagic, icMagicNumber);

    buf.putInt(ICC_Profile.icHdrPlatform, platform);

    buf.putInt(ICC_Profile.icHdrFlags, flags);

    buf.putInt(ICC_Profile.icHdrManufacturer, manufacturerSig);

    buf.putInt(ICC_Profile.icHdrModel, modelSig);

    System.arraycopy(attributes, 0, data, ICC_Profile.icHdrAttributes,

                     attributes.length);

    buf.putInt(ICC_Profile.icHdrRenderingIntent, intent);

    System.arraycopy(illuminant, 0, data, ICC_Profile.icHdrIlluminant,

                     illuminant.length);

    buf.putInt(ICC_Profile.icHdrCreator, creatorSig);

    return buf.array();

  }

  public int getSize()

  {

    return size;

  }

  public void setSize(int s)

  {

    size = s;

  }

  public int getMajorVersion()

  {

    return majorVersion;

  }

  public int getMinorVersion()

  {

    return minorVersion;

  }

  public int getProfileClass()

  {

    return profileClass;

  }

  public void setProfileClass(int pc)

  {

    profileClass = pc;

  }

  public int getColorSpace()

  {

    return colorSpace;

  }

  public int getProfileColorSpace()

  {

    return profileColorSpace;

  }

  public void setColorSpace(int cs)

  {

    colorSpace = cs;

  }

  public void setProfileColorSpace(int pcs)

  {

    profileColorSpace = pcs;

  }

}