byte[] DecodeStream(Stream file, GgaMetaData meta)
{
int dst = 0;
var output = new byte[meta.Width * meta.Height * 4];
using (var input = new BinaryReader(file, Encoding.ASCII, true))
{
var end_pos = input.BaseStream.Position + meta.CompSize;
while (input.BaseStream.Position < end_pos)
{
int code = input.ReadByte();
switch (code)
{
case 0:
{
int src = dst - 4;
int count = input.ReadByte() * 4;
Binary.CopyOverlapped(output, src, dst, count);
dst += count;
break;
}
case 1:
{
int src = dst - 4;
int count = input.ReadUInt16() * 4;
Binary.CopyOverlapped(output, src, dst, count);
dst += count;
break;
}
case 2:
{
int l = input.ReadByte();
int src = dst - (l << 2);
System.Buffer.BlockCopy(output, src, output, dst, 4);
dst += 4;
break;
}
case 3:
{
int l = input.ReadUInt16();
int src = dst - (l << 2);
System.Buffer.BlockCopy(output, src, output, dst, 4);
dst += 4;
break;
}
case 4:
{
int l = input.ReadByte();
int src = dst - (l << 2);
int count = input.ReadByte() * 4;
Binary.CopyOverlapped(output, src, dst, count);
dst += count;
break;
}
case 5:
{
int l = input.ReadByte();
int src = dst - (l << 2);
int count = input.ReadUInt16() * 4;
Binary.CopyOverlapped(output, src, dst, count);
dst += count;
break;
}
case 6:
{
int l = input.ReadUInt16();
int src = dst - (l << 2);
int count = input.ReadByte() * 4;
Binary.CopyOverlapped(output, src, dst, count);
dst += count;
break;
}
case 7:
{
int l = input.ReadUInt16();
int src = dst - (l << 2);
int count = input.ReadUInt16() * 4;
Binary.CopyOverlapped(output, src, dst, count);
dst += count;
break;
}
case 8:
{
System.Buffer.BlockCopy(output, dst - 4, output, dst, 4);
dst += 4;
break;
}
case 9:
{
int src = dst - (int)meta.Width * 4;
System.Buffer.BlockCopy(output, src, output, dst, 4);
dst += 4;
break;
}
case 0x0a:
{
int src = dst - ((int)meta.Width * 4 + 4);
System.Buffer.BlockCopy(output, src, output, dst, 4);
dst += 4;
break;
}
case 0x0b:
{
int src = dst - ((int)meta.Width * 4 - 4);
System.Buffer.BlockCopy(output, src, output, dst, 4);
dst += 4;
break;
}
default:
{
int count = (code - 11) * 4;
if (count != input.Read(output, dst, count))
{
throw new InvalidFormatException("Unexpected end of input");
}
dst += count;
break;
}
}
}
return(output);
}
}
byte[] DecodeStream(Stream file, GgaMetaData meta)
{
int dst = 0;
var output = new byte[meta.Width*meta.Height*4];
using (var input = new BinaryReader (file, Encoding.ASCII, true))
{
var end_pos = input.BaseStream.Position + meta.CompSize;
while (input.BaseStream.Position < end_pos)
{
int code = input.ReadByte();
switch (code)
{
case 0:
{
int src = dst - 4;
int count = input.ReadByte() * 4;
Binary.CopyOverlapped (output, src, dst, count);
dst += count;
break;
}
case 1:
{
int src = dst - 4;
int count = input.ReadUInt16() * 4;
Binary.CopyOverlapped (output, src, dst, count);
dst += count;
break;
}
case 2:
{
int l = input.ReadByte();
int src = dst - (l << 2);
System.Buffer.BlockCopy (output, src, output, dst, 4);
dst += 4;
break;
}
case 3:
{
int l = input.ReadUInt16();
int src = dst - (l << 2);
System.Buffer.BlockCopy (output, src, output, dst, 4);
dst += 4;
break;
}
case 4:
{
int l = input.ReadByte();
int src = dst - (l << 2);
int count = input.ReadByte() * 4;
Binary.CopyOverlapped (output, src, dst, count);
dst += count;
break;
}
case 5:
{
int l = input.ReadByte();
int src = dst - (l << 2);
int count = input.ReadUInt16() * 4;
Binary.CopyOverlapped (output, src, dst, count);
dst += count;
break;
}
case 6:
{
int l = input.ReadUInt16();
int src = dst - (l << 2);
int count = input.ReadByte() * 4;
Binary.CopyOverlapped (output, src, dst, count);
dst += count;
break;
}
case 7:
{
int l = input.ReadUInt16();
int src = dst - (l << 2);
int count = input.ReadUInt16() * 4;
Binary.CopyOverlapped (output, src, dst, count);
dst += count;
break;
}
case 8:
{
System.Buffer.BlockCopy (output, dst-4, output, dst, 4);
dst += 4;
break;
}
case 9:
{
int src = dst - (int)meta.Width * 4;
System.Buffer.BlockCopy (output, src, output, dst, 4);
dst += 4;
break;
}
case 0x0a:
{
int src = dst - ((int)meta.Width * 4 + 4);
System.Buffer.BlockCopy (output, src, output, dst, 4);
dst += 4;
break;
}
case 0x0b:
{
int src = dst - ((int)meta.Width * 4 - 4);
System.Buffer.BlockCopy (output, src, output, dst, 4);
dst += 4;
break;
}
default:
{
int count = (code-11)*4;
if (count != input.Read (output, dst, count))
throw new InvalidFormatException ("Unexpected end of input");
dst += count;
break;
}
}
}
return output;
}
}
