///////////////////////////////////////////////////////////////////////////
private void SaveImageRLE(BinaryReverseWriter writer)
{
// we will write the correct lengths later, so remember
// the position
var lengthPosition = writer.BaseStream.Position;
var rleRowLenghs = new int[m_rows * m_channels];
if (m_imageCompression == ImageCompression.Rle)
{
for (int i = 0; i < rleRowLenghs.Length; i++)
{
writer.Write((short)0x1234);
}
}
//---------------------------------------------------------------
for (int ch = 0; ch < m_channels; ch++)
{
var startIdx = ch * m_rows;
for (int row = 0; row < m_rows; row++)
{
rleRowLenghs[row + startIdx] = RleHelper.EncodedRow(writer.BaseStream, m_imageData[ch],
row * m_columns, m_columns);
}
}
//---------------------------------------------------------------
long endPosition = writer.BaseStream.Position;
writer.BaseStream.Position = lengthPosition;
for (var i = 0; i < rleRowLenghs.Length; i++)
{
writer.Write((short)rleRowLenghs[i]);
}
writer.BaseStream.Position = endPosition;
//---------------------------------------------------------------
}
public void CompressImageData()
{
if (m_imageCompression == ImageCompression.Rle)
{
MemoryStream dataStream = new MemoryStream();
BinaryReverseWriter writer = new BinaryReverseWriter(dataStream);
// we will write the correct lengths later, so remember
// the position
long lengthPosition = writer.BaseStream.Position;
int[] rleRowLengths = new int[m_layer.m_rect.Height];
for (int i = 0; i < rleRowLengths.Length; i++)
{
writer.Write((short)0x1234);
}
//---------------------------------------------------------------
int bytesPerRow = 0;
switch (m_layer.PsdFile.Depth)
{
case 1:
bytesPerRow = ImageDecoder.BytesFromBits(m_layer.m_rect.Width);
break;
case 8:
bytesPerRow = m_layer.m_rect.Width;
break;
case 16:
bytesPerRow = m_layer.m_rect.Width * 2;
break;
}
//---------------------------------------------------------------
for (int row = 0; row < m_layer.m_rect.Height; row++)
{
int rowIndex = row * m_layer.m_rect.Width;
rleRowLengths[row] = RleHelper.EncodedRow(writer.BaseStream, m_imageData, rowIndex, bytesPerRow);
}
//---------------------------------------------------------------
long endPosition = writer.BaseStream.Position;
writer.BaseStream.Position = lengthPosition;
for (int i = 0; i < rleRowLengths.Length; i++)
{
writer.Write((short)rleRowLengths[i]);
}
writer.BaseStream.Position = endPosition;
dataStream.Close();
m_data = dataStream.ToArray();
dataStream.Dispose();
}
else
{
m_data = (byte[])m_imageData.Clone();
}
}