protected void SaveAsBrl4(string path, Rectangle area, string newExt, DataProcessor.Abstract.DataStringProcessor processor)
{
using (var fr = System.IO.File.Open(_file.Properties.FilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
var fname = Path.ChangeExtension(path, newExt);
using (var fw = System.IO.File.Open(fname, FileMode.Create, FileAccess.ReadWrite, FileShare.ReadWrite))
{
fr.Seek(Marshal.SizeOf(typeof(RlViewer.Headers.Concrete.Rl4.Rl4RliFileHeader)), SeekOrigin.Begin);
var rlSubHeader = _head.HeaderStruct.rlParams
.ChangeImgDimensions(area.Width, area.Height)
.ChangeFragmentShift(area.X, area.Y);
RlViewer.Headers.Concrete.Rl4.Rl4RliFileHeader rl4Header =
new Headers.Concrete.Rl4.Rl4RliFileHeader(_head.HeaderStruct.fileSign, _head.HeaderStruct.fileVersion,
_head.HeaderStruct.rhgParams, rlSubHeader, _head.HeaderStruct.synthParams, _head.HeaderStruct.reserved);
var brl4Head = rl4Header.ToBrl4(0, 1, 0);
fw.Write(RlViewer.Behaviors.Converters.StructIO.WriteStruct<RlViewer.Headers.Concrete.Brl4.Brl4RliFileHeader>(brl4Head),
0, Marshal.SizeOf(brl4Head));
byte[] strHeader = new byte[SourceFile.Header.StrHeaderLength];
int strDataLength = _file.Width * _file.Header.BytesPerSample;
byte[] frameData = new byte[area.Width * _file.Header.BytesPerSample];
long lineToStartSaving = (long)area.Y * (long)(_file.Width * _file.Header.BytesPerSample + SourceFile.Header.StrHeaderLength);
long sampleToStartSaving = area.X * _file.Header.BytesPerSample;
fr.Seek(lineToStartSaving, SeekOrigin.Current);
for (int i = 0; i < area.Height; i++)
{
//read-write string header
OnProgressReport((int)((double)i / (double)area.Height * 100));
if (OnCancelWorker())
{
return;
}
fr.Read(strHeader, 0, SourceFile.Header.StrHeaderLength);
var brl4StrHead = Converters.FileHeaderConverters.ToBrl4StrHeader(strHeader);
fw.Write(brl4StrHead, 0, SourceFile.Header.StrHeaderLength);
fr.Seek(sampleToStartSaving, SeekOrigin.Current);
fr.Read(frameData, 0, frameData.Length);
var processedFrame = processor.ProcessRawDataString(frameData);
fw.Write(processedFrame, 0, processedFrame.Length);
fr.Seek(strDataLength - frameData.Length - sampleToStartSaving, SeekOrigin.Current);
}
}
}
}