internal static AniHeaderChunkContent Parse(BinaryReader reader)
{
var result = new AniHeaderChunkContent
{
HeaderSize = reader.ReadUInt32(),
NumFrames = reader.ReadUInt32(),
NumSteps = reader.ReadUInt32(),
FrameWidth = reader.ReadUInt32(),
FrameHeight = reader.ReadUInt32(),
BitCount = reader.ReadUInt32(),
NumPlanes = reader.ReadUInt32(),
DefaultFrameDisplayRate = reader.ReadUInt32(),
};
var attributes = reader.ReadUInt32();
result.FrameType = (attributes & 0x1) == 1
? AniFrameType.IconOrCursorData
: AniFrameType.RawData;
result.FileContainsSequenceData = ((attributes >> 1) & 0x1) == 1;
if (result.FrameType == AniFrameType.RawData)
{
throw new NotSupportedException();
}
return(result);
}
internal static RiffChunk Parse(BinaryReader reader)
{
var chunkType = reader.ReadFourCc();
var chunkSize = reader.ReadUInt32();
var endPosition = reader.BaseStream.Position + chunkSize;
// If this is the RIFF chunk, the chunk size includes the chunk type and chunk size values.
if (chunkType == "RIFF")
{
endPosition -= 8;
}
RiffChunkContent content;
switch (chunkType)
{
case "RIFF":
case "LIST":
content = RiffChunkList.Parse(reader, endPosition);
break;
case "INAM":
case "IART":
content = InfoChunkContent.Parse(reader);
break;
case "anih":
content = AniHeaderChunkContent.Parse(reader);
break;
case "rate":
content = RateChunkContent.Parse(reader, endPosition);
break;
case "seq ":
content = SequenceChunkContent.Parse(reader, endPosition);
break;
case "icon":
content = IconChunkContent.Parse(reader, endPosition);
break;
default:
throw new InvalidDataException($"Chunk type not supported: {chunkType}");
}
if (reader.BaseStream.Position != endPosition)
{
throw new InvalidDataException();
}
if (chunkSize % 2 != 0)
{
// Pad byte.
reader.ReadByte();
}
return(new RiffChunk
{
ChunkType = chunkType,
Size = chunkSize,
Content = content
});
}
