public Reader(Stream input, GrxMetaData info)
{
m_input = input;
m_info = info;
m_pixel_size = (m_info.BPP + 7) / 8;
switch (m_info.BPP)
{
case 32:
Format = PixelFormats.Bgr32;
break;
case 24:
Format = PixelFormats.Bgr32;
m_pixel_size = 4;
break;
case 16:
Format = PixelFormats.Bgr565;
break;
case 15:
Format = PixelFormats.Bgr555;
break;
case 8:
Format = PixelFormats.Gray8;
break;
default:
throw new InvalidFormatException();
}
m_aligned_width = ((int)m_info.Width + 3) & ~3;
Stride = m_aligned_width * m_pixel_size;
m_output = new byte[Stride * (int)info.Height];
}
public Reader(Stream input, GrxMetaData info)
{
m_input = input;
m_info = info;
m_input.Seek(0x10, SeekOrigin.Current);
m_pixel_size = m_info.BPP / 8;
switch (m_info.BPP)
{
case 32:
Format = PixelFormats.Bgr32;
break;
case 24:
Format = PixelFormats.Bgr32;
m_pixel_size = 4;
break;
case 16:
Format = PixelFormats.Bgr565;
break;
case 8:
Format = PixelFormats.Gray8;
break;
default:
throw new InvalidFormatException();
}
m_aligned_width = (m_info.Width + 3u) & ~3u;
Stride = (int)(m_aligned_width * m_pixel_size);
m_output = new byte[Stride * (int)info.Height];
}
internal GrxMetaData ReadInfo(IBinaryStream file)
{
var info = new GrxMetaData();
info.IsPacked = file.ReadByte() != 0;
info.HasAlpha = file.ReadByte() != 0;
info.BPP = file.ReadUInt16();
info.Width = file.ReadUInt16();
info.Height = file.ReadUInt16();
info.AlphaOffset = file.ReadInt32();
return(info);
}