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