public static TgaHeader ReadHeader(Stream stream)
{
var header = new TgaHeader
{
IdLength = ReadByte(stream),
ColorMapType = ReadByte(stream),
DataTypeCode = ReadDataTypeCode(stream),
ColorMapOrigin = ReadShort(stream),
ColorMapLength = ReadShort(stream),
ColorMapDepth = ReadByte(stream),
XOrigin = ReadShort(stream),
YOrigin = ReadShort(stream),
Width = ReadShort(stream),
Height = ReadShort(stream),
BitsPerPixel = ReadByte(stream),
ImageDescriptor = ReadByte(stream)
};
return(header);
}
private static ImageSource Decode(byte[] data, TgaHeader tgaHeader, int size)
{
switch (tgaHeader.DataTypeCode)
{
case DataTypeCode.Rgb:
return(RgbDecoder.Decode(data, tgaHeader, size));
case DataTypeCode.RgbRle:
return(RgbRleDecoder.Decode(data, tgaHeader, size));
case DataTypeCode.Bw:
case DataTypeCode.BwRle:
case DataTypeCode.ColorMapped:
case DataTypeCode.ColorMappedRle:
case DataTypeCode.ColorMappedCompressed:
case DataTypeCode.ColorMappedCompressedQuad:
case DataTypeCode.NoImageData:
return(null); // We know about these formats but don't offer a preview of them
default:
throw new UnsupportedPixelFormatException();
}
}
