public static AseChunk ReadChunk(AseFrame frame, ChunkType type, int size, AseReader reader)
{
var pos = reader.Position;
AseChunk chunk = null;
switch (type)
{
// Chunk types we care about
case ChunkType.Palette:
chunk = new AsePaletteChunk(frame, reader);
break;
case ChunkType.Layer:
chunk = new AseLayerChunk(frame, reader);
break;
case ChunkType.Cel:
chunk = new AseCelChunk(frame, reader, size);
break;
case ChunkType.ColorProfile:
chunk = new AseColorProfileChunk(frame, reader);
break;
case ChunkType.FrameTags:
chunk = new AseFrameTagsChunk(frame, reader);
break;
case ChunkType.Slice:
chunk = new AseSliceChunk(frame, reader);
break;
case ChunkType.UserData:
chunk = new AseUserDataChunk(frame, reader);
break;
// Chunk types we don't care about
case ChunkType.OldPalette:
chunk = new AseDummyChunk(frame, reader, type, size);
break;
// Chunk types we haven't handled yet. Indicates a bug that should be fixed.
default:
chunk = new AseDummyChunk(frame, reader, type, size);
Debug.LogErrorFormat("Unhandled chunk type: {0}", ((ushort)type).ToString("X4"));
break;
}
// Check that we read the right amount of bytes
Assert.IsTrue((reader.Position - pos) == size, string.Format("Chunk {0} read {1} bytes but we were expected {2} bytes read", type, reader.Position - pos, size));
reader.LastChunk = chunk;
return(chunk);
}
public AseCelChunk(AseFrame frame, AseReader reader, int size)
: base(frame)
{
// Keep track of read position
var pos = reader.Position;
LayerIndex = reader.ReadWORD();
PositionX = reader.ReadSHORT();
PositionY = reader.ReadSHORT();
Opacity = reader.ReadBYTE();
CelType = (CelType)reader.ReadWORD();
// Ignore next 7 bytes
reader.ReadBYTEs(7);
if (CelType == CelType.Raw)
{
Width = reader.ReadWORD();
Height = reader.ReadWORD();
var bytesRead = reader.Position - pos;
PixelBytes = reader.ReadBYTEs(size - bytesRead);
}
else if (CelType == CelType.Linked)
{
FramePositionLink = reader.ReadWORD();
// Get a reference to our linked cell. It should be in a previous frame with a matching layer index.
Debug.Assert(Frame.AseFile.Frames.Count > FramePositionLink);
LinkedCel = Frame.AseFile.Frames[FramePositionLink].Chunks.OfType <AseCelChunk>().FirstOrDefault(c => c.LayerIndex == LayerIndex);
Debug.Assert(LinkedCel != null);
}
else if (CelType == CelType.CompressedImage)
{
Width = reader.ReadWORD();
Height = reader.ReadWORD();
var bytesRead = reader.Position - pos;
var compressed = reader.ReadBYTEs(size - bytesRead);
PixelBytes = ZlibDeflate(compressed);
}
}
public void VisitCelChunk(AseCelChunk cel)
{
// Is our layer visible?
var layer = m_Layers[cel.LayerIndex];
if (!layer.IsVisible)
{
return;
}
if (cel.LinkedCel != null)
{
cel = cel.LinkedCel;
}
byte opacity = PixmanCombine.MUL_UN8(cel.Opacity, layer.Opacity);
var blendfunc = GetBlendFunc(layer);
for (int i = 0; i < cel.Width; i++)
{
for (int j = 0; j < cel.Height; j++)
{
var x = cel.PositionX + i;
var y = FlipY(cel.PositionY + j);
Color32 colorBackdrop = m_Texture2D.GetPixel(x, y);
Color32 colorSrc = GetPixelFromBytes(i, j, cel.Width, cel.PixelBytes);
uint backdrop = Color32ToRGBA(colorBackdrop);
uint src = Color32ToRGBA(colorSrc);
uint result = blendfunc(backdrop, src, opacity);
Color32 colorResult = RGBAToColor32(result);
m_Texture2D.SetPixel(x, y, colorResult);
}
}
m_Texture2D.Apply();
}