/// <summary>
/// init: is called automatically before writing the first row
/// </summary>
private void Init()
{
datStream = new PngIDatChunkOutputStream(this.outputStream, this.IdatMaxSize);
datStreamDeflated = ZlibStreamFactory.CreateZlibOutputStream(datStream, this.CompLevel, this.CompressionStrategy, true);
WriteSignatureAndIHDR();
WriteFirstChunks();
}
internal static byte[] CompressBytes(byte[] ori, int offset, int len, bool compress)
{
try
{
MemoryStream inb = new MemoryStream(ori, offset, len);
Stream inx = inb;
if (!compress)
{
inx = ZlibStreamFactory.CreateZlibInputStream(inb);
}
MemoryStream outb = new MemoryStream();
Stream outx = outb;
if (compress)
{
outx = ZlibStreamFactory.CreateZlibOutputStream(outb);
}
ShovelInToOut(inx, outx);
inx.Close();
outx.Close();
byte[] res = outb.ToArray();
return(res);
}
catch (Exception e)
{
throw new PngjException(e);
}
}