public void Parse(Tags tags, BinaryReader reader, int size)
{
reader.BaseStream.Seek(tags.position, SeekOrigin.Begin);
image_id_ = (int)reader.ReadUInt16();
if ((int)tags.tag == (int)ObjectType.DefineBitsLossLess2)
{
is_loss_less_ = true;
byte format = reader.ReadByte();
width_ = reader.ReadUInt16();
height_ = reader.ReadUInt16();
MemoryStream ms = new MemoryStream();
StreamUtil.Copy(reader.BaseStream, ms, size - 7);
ms.Seek(0, SeekOrigin.Begin);
ICSharpCode.SharpZipLib.Zip.Compression.Streams.InflaterInputStream zis =
new ICSharpCode.SharpZipLib.Zip.Compression.Streams.InflaterInputStream(ms);
MemoryStream ms2 = new MemoryStream();
byte[] b = new byte[1024];
int s;
while ((s = zis.Read(b, 0, b.Length)) > 0)
{
ms2.Write(b, 0, s);
}
zis.Close();
ms2.Seek(0, SeekOrigin.Begin);
raw_data_ = new byte[ms2.Length];
ms2.Read(raw_data_, 0, raw_data_.Length);
}
else
{
reader.BaseStream.Seek(tags.position, SeekOrigin.Begin);
image_id_ = (int)reader.ReadUInt16();
MemoryStream ms = new MemoryStream();
StreamUtil.Copy(reader.BaseStream, ms, size - 2);
image_ = new Bitmap(ms);
}
}
/// <summary>
/// 解压字符串
/// </summary>
/// <param name="pBytes"></param>
/// <returns></returns>
public byte[] DeCompress(byte[] pBytes)
{
ICSharpCode.SharpZipLib.Zip.Compression.Streams.InflaterInputStream mStream = new ICSharpCode.SharpZipLib.Zip.Compression.Streams.InflaterInputStream(new MemoryStream(pBytes));
MemoryStream mMemory = new MemoryStream();
Int32 mSize;
byte[] mWriteData = new byte[4096];
while (true)
{
mSize = mStream.Read(mWriteData, 0, mWriteData.Length);
if (mSize > 0)
{
mMemory.Write(mWriteData, 0, mSize);
}
else
{
break;
}
}
mStream.Close();
return(mMemory.ToArray());
}
/// <summary>
/// 解壓處理的byte陣列
/// </summary>
/// <param name="bytes">傳入要處理的byte陣列</param>
/// <returns>回傳位元陣列</returns>
public static byte[] DeCompress(byte[] bytes)
{
//使用壓縮的輸入資料流
//使用memory資料流讀入要處理的byte陣列 來處理 解壓輸入處理資料
ZipProc.Streams.InflaterInputStream stream = new ZipProc.Streams.InflaterInputStream(
new MemoryStream(bytes));
//開起記憶體空間資料流
MemoryStream memory = new MemoryStream();
//宣告byte陣列,預設為4k
byte[] writeData = new byte[4096];
int size;
while (true)
{
//讀取解壓的輸入資料流 , 並將結果放到byte陣列 ,每次處理4K
size = stream.Read(writeData, 0, writeData.Length);
if (size > 0) //還有解壓資料,將資料放到memory 資料流
memory.Write(writeData, 0, size);
else //無解縮資料,離開迴圈
break;
}
//關閉解壓輸入資料流
stream.Close();
//回傳記憶體資料流內的陣列
return memory.ToArray();
}