/// <summary>
/// Creates a new SPR2 instance.
/// </summary>
/// <param name="Chunk">The data for the chunk.</param>
/// <param name="PMaps">The palettemaps for this SPR2.</param>
public SPR2Parser(IffChunk Chunk, List <PaletteMap> PMaps) : base(Chunk)
{
m_Name = Name;
int[] offsets;
MemoryStream MemStream = new MemoryStream(Chunk.Data);
BinaryReader Reader = new BinaryReader(MemStream);
m_Version = Reader.ReadUInt32();
//In version 1001, all frames are decompressed from the beginning, and there's no point in storing
//the compressed data AS WELL as the decompressed frames...!
if (m_Version == 1000)
{
m_ChunkData = Chunk.Data;
}
if (m_Version == 1001)
{
m_PaletteID = Reader.ReadUInt32();
m_FrameCount = Reader.ReadUInt32();
}
else
{
m_FrameCount = Reader.ReadUInt32();
m_PaletteID = Reader.ReadUInt32();
}
if (PMaps.Count == 1 && m_PaletteID == 1)
{
m_PMap = PMaps[0];
}
else
{
m_PMap = PMaps.Find(delegate(PaletteMap PMap) { if (PMap.ID == m_PaletteID)
{
return(true);
}
return(false); });
}
//Some SPR2s blatantly specify the wrong ID because there's only one palettemap...
if (m_PMap == null)
{
m_PMap = PMaps[0];
}
offsets = new int[m_FrameCount];
if (m_Version == 1000)
{
for (int i = 0; i < m_FrameCount; i++)
{
offsets[i] = Reader.ReadInt32();
m_FrameOffsets.Add(offsets[i]);
}
}
if (m_Version == 1001)
{
for (int l = 0; l < m_FrameCount; l++)
{
SpriteFrame Frame = new SpriteFrame();
Frame.Version = Reader.ReadUInt32();
Frame.Size = Reader.ReadUInt32();
Frame.Width = Reader.ReadUInt16();
Frame.Height = Reader.ReadUInt16();
Frame.Flag = Reader.ReadUInt32();
Frame.PaletteID = Reader.ReadUInt16();
Frame.TransparentPixel = m_PMap.GetColorAtIndex(Reader.ReadUInt16());
Frame.YLocation = Reader.ReadUInt16();
Frame.XLocation = Reader.ReadUInt16();
if ((SPR2Flags)Frame.Flag == SPR2Flags.HasAlphaChannel)
{
Frame.Init(true, true);
}
else
{
if ((SPR2Flags)Frame.Flag == SPR2Flags.HasZBufferChannel)
{
Frame.Init(false, true);
}
else
{
Frame.Init(false, false);
}
}
DecompressFrame2(ref Frame, ref Reader);
Frame.BitmapData.Unlock(true); //The bitmapdata is locked when the frame is created.
if (Frame.HasZBuffer)
{
Frame.ZBuffer.Unlock(true); //The bitmapdata is locked when the frame is created.
}
m_Frames.Add(Frame);
}
}
Reader.Close();
}
/// <summary>
/// Decompresses a frame stored in this SPR.
/// </summary>
/// <param name="Frame">A SpriteFrame instance that will contain the decompressed frame.</param>
/// <param name="Reader">The binary reader to read the frame with.</param>
private void DecompressFrame2(ref SpriteFrame Frame, ref BinaryReader Reader)
{
bool quit = false;
byte Clr = 0;
Color Transparent;
int CurrentRow = 0, CurrentColumn = 0;
byte PixCommand, PixCount = 0;
if (m_PMap == null)
{
m_PMap = new PaletteMap();
}
while (quit == false)
{
byte RowCommand = Reader.ReadByte();
byte RowCount = Reader.ReadByte();
switch (RowCommand)
{
case 0x00: //Start marker; the count byte is ignored.
break;
//Fill this row with pixel data that directly follows; the count byte of the row command denotes the
//size in bytes of the row and pixel data.
case 0x04:
RowCount -= 2;
CurrentColumn = 0;
while (RowCount > 0)
{
PixCommand = Reader.ReadByte();
PixCount = Reader.ReadByte();
RowCount -= 2;
switch (PixCommand)
{
case 1: //Leave the next pixel count pixels as transparent.
Transparent = Color.FromArgb(0, 0, 0, 0);
for (int j = CurrentColumn; j < (CurrentColumn + PixCount); j++)
{
Frame.BitmapData.SetPixel(new Point(j, CurrentRow), Transparent);
}
CurrentColumn += PixCount;
break;
case 2: //Fill the next pixel count pixels with a palette color.
//The pixel data is two bytes: the first byte denotes the palette color index, and the
//second byte is padding (which is always equal to the first byte but is ignored).
Clr = Reader.ReadByte();
Reader.ReadByte(); //Padding
RowCount -= 2;
for (int j = CurrentColumn; j < (CurrentColumn + PixCount); j++)
{
Frame.BitmapData.SetPixel(new Point(j, CurrentRow),
m_PMap.GetColorAtIndex(Clr));
}
CurrentColumn += PixCount;
break;
case 3: //Set the next pixel count pixels to the palette color indices defined by the
//pixel data provided directly after this command.
byte Padding = (byte)(PixCount % 2);
if (Padding != 0)
{
RowCount -= (byte)(PixCount + Padding);
}
else
{
RowCount -= PixCount;
}
for (int j = CurrentColumn; j < (CurrentColumn + PixCount); j++)
{
Clr = Reader.ReadByte();
Frame.BitmapData.SetPixel(new Point(j, CurrentRow),
m_PMap.GetColorAtIndex(Clr));
}
CurrentColumn += PixCount;
if (Padding != 0)
{
Reader.ReadByte();
}
break;
}
}
CurrentRow++;
break;
case 0x05: //End marker. The count byte is always 0, but may be ignored.
//Some sprites don't have these, so read them using ReadBytes(), which
//simply returns an empty array if the stream couldn't be read.
Reader.ReadBytes(2); //PixCommand and PixCount.
quit = true;
break;
case 0x09: //Leave the next count rows as transparent.
PixCommand = Reader.ReadByte();
PixCount = Reader.ReadByte();
Transparent = Color.FromArgb(0, 0, 0, 0);
for (int i = 0; i < RowCount; i++)
{
for (int j = CurrentColumn; j < Frame.Width; j++)
{
Frame.BitmapData.SetPixel(new Point(j, CurrentRow), Transparent);
}
CurrentRow++;
}
break;
case 0x10: //Start marker, equivalent to 0x00; the count byte is ignored.
break;
}
if (Reader.BaseStream.Position == Reader.BaseStream.Length)
{
break;
}
}
}
