// Get bitmap data by BmpNo
private Color32[] GetBitmapByBmpNo(int bmpno, AdrnData adrnBlock)
{
if (adrnBlock.BitmapNo != bmpno)
{
Debug.Log("Error loading adrnData, could be resulted from errors in bin loading");
return(null);
}
if (fsReal == null)
{
fsReal = File.OpenRead(Application.dataPath + Consts.REAL);
}
if (fsReal == null)
{
Debug.Log("Error opening real.bin");
return(null);
}
fsReal.Seek((long)adrnBlock.Address, SeekOrigin.Begin);
Stream realOut = new MemoryStream();
RealHeader rhOut = new RealHeader();
if (Decode(fsReal, out realOut, out rhOut) == true)
{
realOut.Seek(0, SeekOrigin.Begin);
Color32[] colors = new Color32[realOut.Length];
for (int i = 0; i < realOut.Length; i++)
{
int colorindex = realOut.ReadByte();
if (colorindex < 0 || colorindex > 255)
{
return(null);
}
colors[i].a = activePalette[colorindex].a;
colors[i].r = activePalette[colorindex].r;
colors[i].g = activePalette[colorindex].g;
colors[i].b = activePalette[colorindex].b;
}
return(colors);
}
else
{
Debug.Log("Error while decoding from stream");
return(null);
}
}
// Decode input to bitmap data
private bool Decode(Stream input, out Stream output, out RealHeader header)
{
output = new MemoryStream();
byte[] bufferHeader = new byte[16];
input.Read(bufferHeader, 0, bufferHeader.Length);
header = new RealHeader();
header = ByteToStruct <RealHeader>(bufferHeader);
if (!string.Equals("RD", System.Text.Encoding.Default.GetString(System.BitConverter.GetBytes(header.ID))))
{
output = null;
return(false);
}
byte[] bufferInput = new byte[header.Size - bufferHeader.Length];
int bytesread = input.Read(bufferInput, 0, header.Size - bufferHeader.Length);
// 未壓縮圖像數據大小尚未明朗
if (header.CompressFlag == 0)
{
Debug.Log("Warning: Uncompressed image data detected!");
output.Seek(0, SeekOrigin.Begin);
output.Write(bufferInput, 0, bytesread);
return(true);
}
int indexInput = 0;
byte idx;
byte repData;
int cnt;
output.Seek(0, SeekOrigin.Begin);
while (indexInput < bufferInput.Length)
{
idx = bufferInput[indexInput++];
if ((idx & Consts.BIT_CMP) != 0)
{
if ((idx & Consts.BIT_ZERO) != 0)
{
repData = 0;
}
else
{
repData = bufferInput[indexInput++];
}
if ((idx & Consts.BIT_REP_LARG2) != 0)
{
cnt = ((idx & 0x0f) << 16);
cnt |= ((bufferInput[indexInput]) << 8);
indexInput++;
cnt |= bufferInput[indexInput++];
}
else if ((idx & Consts.BIT_REP_LARG) != 0)
{
cnt = ((idx & 0x0f) << 8);
cnt |= bufferInput[indexInput++];
}
else
{
cnt = (idx & 0x0f);
}
for (int i = 0; i < cnt && output.CanWrite; i++)
{
output.WriteByte(repData);
}
}
else
{
if ((idx & Consts.BIT_REP_LARG) != 0)
{
cnt = ((idx & 0x0f) << 8);
cnt |= bufferInput[indexInput++];
}
else
{
cnt = (idx & 0x0f);
}
if (cnt >= 0xfffff)
{
return(false);
}
for (int i = 0; i < cnt && output.CanWrite; i++) // TODO 長度限制待測試
{
output.WriteByte(bufferInput[indexInput++]);
}
}
}
return(true);
}