public override ImageMetaData ReadMetaData(Stream stream)
{
var header = new byte[0x20];
if (header.Length != stream.Read(header, 0, header.Length))
{
return(null);
}
if (header[0] != 1 && header[0] != 2)
{
return(null);
}
if (header[1] != 1 && header[1] != 0xA1 && header[1] != 0xA2)
{
return(null);
}
int bpp = LittleEndian.ToUInt16(header, 6);
if (bpp != 24 && bpp != 32)
{
return(null);
}
int left = LittleEndian.ToUInt16(header, 8);
int right = LittleEndian.ToUInt16(header, 0xA);
int top = LittleEndian.ToUInt16(header, 0xC);
int bottom = LittleEndian.ToUInt16(header, 0xE);
var info = new GrdMetaData {
Format = LittleEndian.ToUInt16(header, 0),
Width = (uint)(right - left),
Height = (uint)(bottom - top),
BPP = bpp,
OffsetX = left,
OffsetY = top,
AlphaSize = LittleEndian.ToInt32(header, 0x10),
RSize = LittleEndian.ToInt32(header, 0x14),
GSize = LittleEndian.ToInt32(header, 0x18),
BSize = LittleEndian.ToInt32(header, 0x1C),
};
if (0x20 + info.AlphaSize + info.RSize + info.BSize + info.GSize != stream.Length)
{
return(null);
}
return(info);
}
public override ImageMetaData ReadMetaData(IBinaryStream stream)
{
var header = stream.ReadHeader(0x20);
if (header[0] != 1 && header[0] != 2)
{
return(null);
}
if (header[1] != 1 && header[1] != 0xA1 && header[1] != 0xA2)
{
return(null);
}
int bpp = header.ToUInt16(6);
if (bpp != 24 && bpp != 32)
{
return(null);
}
int screen_width = header.ToUInt16(2);
int screen_height = header.ToUInt16(4);
int left = header.ToUInt16(8);
int right = header.ToUInt16(0xA);
int top = header.ToUInt16(0xC);
int bottom = header.ToUInt16(0xE);
var info = new GrdMetaData {
Format = header.ToUInt16(0),
Width = (uint)(right - left),
Height = (uint)(bottom - top),
BPP = bpp,
OffsetX = left,
OffsetY = screen_height - bottom,
AlphaSize = header.ToInt32(0x10),
RSize = header.ToInt32(0x14),
GSize = header.ToInt32(0x18),
BSize = header.ToInt32(0x1C),
};
if (0x20 + info.AlphaSize + info.RSize + info.BSize + info.GSize != stream.Length)
{
return(null);
}
return(info);
}
public GrdReader(Stream input, GrdMetaData info)
{
m_input = input;
m_info = info;
if (24 == m_info.BPP)
{
Format = PixelFormats.Bgr24;
}
else if (m_info.AlphaSize > 0)
{
Format = PixelFormats.Bgra32;
}
else
{
Format = PixelFormats.Bgr32;
}
int channel_size = (int)(m_info.Width * m_info.Height);
m_pack_type = m_info.Format >> 8;
m_pixel_size = m_info.BPP / 8;
m_output = new byte[m_pixel_size * channel_size];
m_channel = new byte[channel_size];
}
