long FlcDeltaFlc(BinaryFormatter formatter, int frame)
{
long pos, read;
short lines, l, b, colour;
byte skip;
sbyte change;
lines = formatter.ReadShort16();
read = 6 + sizeof(short);
l = 0;
while (lines > 0) {
pos = l * FlcHeader.width;
b = formatter.ReadShort16();
read += 2;
if ((b & 0xC000) == 0x0000) {
b &= 0x3FFF;
for (int j = 0; j < b; j++) {
skip = formatter.ReadByte();
pos += skip;
read += 1;
change = formatter.ReadSByte();
read += 1;
if (change > 0) {
for (int i = 0; i < change; i++) {
colour = formatter.ReadShort16();
read += 2;
mBufferFrames[frame][pos++] = (byte)(colour & 0x00FF);
mBufferFrames[frame][pos++] = (byte)((colour >> 8) & 0x00FF);
}
}
else {
change = (sbyte)-change;
colour = formatter.ReadShort16();
read += 2;
for (int i = 0; i < change; i++) {
mBufferFrames[frame][pos++] = (byte)(colour & 0x00FF);
mBufferFrames[frame][pos++] = (byte)((colour >> 8) & 0x00FF);
}
}
}
lines--;
l++;
}
else {
if ((b & 0xC000) == 0xC000)
l -= b;
else
mBufferFrames[frame][pos++] = (byte)(b & 0x00FF);
}
}
if ((read % 4) == 1) {
formatter.ReadBytes(2);
read++;
}
return read;
}