213 lines
8.4 KiB
C#
213 lines
8.4 KiB
C#
/// <summary>**************************************************************************
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///
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/// $Id: SYccColorSpaceMapper.java,v 1.1 2002/07/25 14:52:01 grosbois Exp $
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///
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/// Copyright Eastman Kodak Company, 343 State Street, Rochester, NY 14650
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/// $Date $
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/// ***************************************************************************
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/// </summary>
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using System;
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using ParameterList = CSJ2K.j2k.util.ParameterList;
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using BlkImgDataSrc = CSJ2K.j2k.image.BlkImgDataSrc;
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using DataBlk = CSJ2K.j2k.image.DataBlk;
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using DataBlkInt = CSJ2K.j2k.image.DataBlkInt;
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using DataBlkFloat = CSJ2K.j2k.image.DataBlkFloat;
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using ImgDataAdapter = CSJ2K.j2k.image.ImgDataAdapter;
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using FacilityManager = CSJ2K.j2k.util.FacilityManager;
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namespace CSJ2K.Color
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{
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/// <summary> This decodes maps which are defined in the e-sRGB
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/// colorspace into the sRGB colorspace.
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///
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/// </summary>
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/// <seealso cref="jj2000.j2k.colorspace.ColorSpace">
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/// </seealso>
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/// <version> 1.0
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/// </version>
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/// <author> Jason S. Clary
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/// </author>
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public class EsRgbColorSpaceMapper : ColorSpaceMapper
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{
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/// <summary> Factory method for creating instances of this class.</summary>
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/// <param name="src">-- source of image data
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/// </param>
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/// <param name="csMap">-- provides colorspace info
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/// </param>
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/// <returns> SYccColorSpaceMapper instance
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/// </returns>
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public static new BlkImgDataSrc createInstance(BlkImgDataSrc src, ColorSpace csMap)
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{
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return new EsRgbColorSpaceMapper(src, csMap);
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}
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/// <summary> Ctor which creates an ICCProfile for the image and initializes
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/// all data objects (input, working, and output).
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///
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/// </summary>
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/// <param name="src">-- Source of image data
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/// </param>
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/// <param name="csm">-- provides colorspace info
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/// </param>
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protected internal EsRgbColorSpaceMapper(BlkImgDataSrc src, ColorSpace csMap):base(src, csMap)
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{
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initialize();
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}
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/// <summary>General utility used by ctors </summary>
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private void initialize()
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{
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if (ncomps != 1 && ncomps != 3)
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{
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System.String msg = "EsRgbColorSpaceMapper: e-sRGB transformation _not_ applied to " + ncomps + " component image";
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FacilityManager.getMsgLogger().printmsg(CSJ2K.j2k.util.MsgLogger_Fields.ERROR, msg);
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throw new ColorSpaceException(msg);
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}
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}
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/// <summary>
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/// <para>Returns, in the blk argument, a block of image data containing the
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/// specifed rectangular area, in the specified component. The data is
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/// returned, as a copy of the internal data, therefore the returned data
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/// can be modified "in place".</para>
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///
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/// <para>The rectangular area to return is specified by the 'ulx', 'uly', 'w'
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/// and 'h' members of the 'blk' argument, relative to the current
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/// tile. These members are not modified by this method. The 'offset' of
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/// the returned data is 0, and the 'scanw' is the same as the block's
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/// width. See the 'DataBlk' class.</para>
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///
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/// <para>If the data array in 'blk' is 'null', then a new one is created. If
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/// the data array is not 'null' then it is reused, and it must be large
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/// enough to contain the block's data. Otherwise an 'ArrayStoreException'
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/// or an 'IndexOutOfBoundsException' is thrown by the Java system.</para>
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///
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/// <para>The returned data has its 'progressive' attribute set to that of the
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/// input data.</para>
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///
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/// </summary>
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/// <param name="blk">Its coordinates and dimensions specify the area to
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/// return. If it contains a non-null data array, then it must have the
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/// correct dimensions. If it contains a null data array a new one is
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/// created. The fields in this object are modified to return the data.
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///
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/// </param>
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/// <param name="c">The index of the component from which to get the data. Only 0
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/// and 3 are valid.
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///
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/// </param>
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/// <returns> The requested DataBlk
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/// </returns>
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/// <seealso cref="getInternCompData">
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///
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/// </seealso>
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public override DataBlk getCompData(DataBlk outblk, int c)
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{
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int type = outblk.DataType;
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double colors = Math.Pow(2, src.getNomRangeBits(c));
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double bitoff=colors*0.375D;
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if (type == DataBlk.TYPE_INT)
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{
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DataBlkInt intblk=(DataBlkInt)src.getInternCompData(outblk, c);
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for (int i = 0; i < intblk.data_array.Length; i++)
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{
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int tmp = intblk.data_array[i];
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tmp += (int)(colors / 2);
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tmp -= (int)bitoff;
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tmp *= 2;
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tmp -= (int)(colors / 2);
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intblk.data_array[i] = tmp;
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}
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outblk = intblk;
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}
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else if (type == DataBlk.TYPE_FLOAT)
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{
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FacilityManager.getMsgLogger().printmsg(CSJ2K.j2k.util.MsgLogger_Fields.WARNING, "Unsupported e-sRGB DataType (float)");
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DataBlkFloat fltblk = (DataBlkFloat)src.getInternCompData(outblk, c);
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outblk = fltblk;
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}
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return outblk;
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}
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/// <summary> Returns, in the blk argument, a block of image data containing the
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/// specifed rectangular area, in the specified component. The data is
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/// returned, as a reference to the internal data, if any, instead of as a
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/// copy, therefore the returned data should not be modified.
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///
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/// <P>The rectangular area to return is specified by the 'ulx', 'uly', 'w'
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/// and 'h' members of the 'blk' argument, relative to the current
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/// tile. These members are not modified by this method. The 'offset' and
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/// 'scanw' of the returned data can be arbitrary. See the 'DataBlk' class.
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///
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/// <P>This method, in general, is more efficient than the 'getCompData()'
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/// method since it may not copy the data. However if the array of returned
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/// data is to be modified by the caller then the other method is probably
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/// preferable.
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///
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/// <P>If possible, the data in the returned 'DataBlk' should be the
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/// internal data itself, instead of a copy, in order to increase the data
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/// transfer efficiency. However, this depends on the particular
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/// implementation (it may be more convenient to just return a copy of the
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/// data). This is the reason why the returned data should not be modified.
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///
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/// <P>If the data array in <tt>blk</tt> is <tt>null</tt>, then a new one
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/// is created if necessary. The implementation of this interface may
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/// choose to return the same array or a new one, depending on what is more
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/// efficient. Therefore, the data array in <tt>blk</tt> prior to the
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/// method call should not be considered to contain the returned data, a
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/// new array may have been created. Instead, get the array from
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/// <tt>blk</tt> after the method has returned.
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///
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/// <P>The returned data may have its 'progressive' attribute set. In this
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/// case the returned data is only an approximation of the "final" data.
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///
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/// </summary>
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/// <param name="blk">Its coordinates and dimensions specify the area to return,
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/// relative to the current tile. Some fields in this object are modified
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/// to return the data.
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///
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/// </param>
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/// <param name="c">The index of the component from which to get the data.
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///
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/// </param>
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/// <returns> The requested DataBlk
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///
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/// </returns>
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/// <seealso cref="getCompData">
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/// </seealso>
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public override DataBlk getInternCompData(DataBlk out_Renamed, int c)
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{
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return getCompData(out_Renamed, c);
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}
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/// <summary>Return a suitable String representation of the class instance. </summary>
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public override System.String ToString()
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{
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int i;
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System.Text.StringBuilder rep_nComps = new System.Text.StringBuilder("ncomps= ").Append(System.Convert.ToString(ncomps));
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System.Text.StringBuilder rep_comps = new System.Text.StringBuilder();
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for (i = 0; i < ncomps; ++i)
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{
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rep_comps.Append(" ").Append("component[").Append(System.Convert.ToString(i)).Append("] height, width = (").Append(src.getCompImgHeight(i)).Append(", ").Append(src.getCompImgWidth(i)).Append(")").Append(eol);
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}
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System.Text.StringBuilder rep = new System.Text.StringBuilder("[EsRGBColorSpaceMapper ");
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rep.Append(rep_nComps).Append(eol);
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rep.Append(rep_comps).Append(" ");
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return rep.Append("]").ToString();
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}
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}
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} |