/// <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> Read the header and tags into memory and verify
/// that the correct type of profile is being used. for encoding.
/// </summary>
/// <param name="data">ICCProfile
/// </param>
/// <exception cref="ICCProfileInvalidException">for bad signature and class and bad type
/// </exception>
private void initProfile(byte[] data)
{
header = new ICCProfileHeader(data);
tags = ICCTagTable.createInstance(data);
// Verify that the data pointed to by icc is indeed a valid profile
// and that it is possibly of one of the Restricted ICC types. The simplest way to check
// this is to verify that the profile signature is correct, that it is an input profile,
// and that the PCS used is XYX.
// However, a common error in profiles will be to create Monitor profiles rather
// than input profiles. If this is the only error found, it's still useful to let this
// go through with an error written to stderr.
if (ProfileClass == kdwDisplayProfile)
{
string message = "NOTE!! Technically, this profile is a Display profile, not an"
+ " Input Profile, and thus is not a valid Restricted ICC profile."
+ " However, it is quite possible that this profile is usable as"
+ " a Restricted ICC profile, so this code will ignore this state"
+ " and proceed with processing.";
FacilityManager.getMsgLogger().printmsg(CSJ2K.j2k.util.MsgLogger_Fields.WARNING, message);
}
if ((ProfileSignature != kdwProfileSignature) ||
((ProfileClass != kdwInputProfile) && (ProfileClass != kdwDisplayProfile)) || (PCSType != kdwXYZData))
{
throw new ICCProfileInvalidException();
}
}
/// <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);
}
}
