public override ImageMetaData ReadMetaData(IBinaryStream stream)
{
var header = stream.ReadHeader(0x14);
int compression = header.ToUInt16(0xC);
if (compression < 1 || compression > 3)
{
return(null);
}
int depth = header.ToInt16(0x10);
var info = new CrxMetaData
{
Width = header.ToUInt16(8),
Height = header.ToUInt16(10),
OffsetX = header.ToInt16(4),
OffsetY = header.ToInt16(6),
BPP = 0 == depth ? 24 : 1 == depth ? 32 : 8,
Compression = compression,
CompressionFlags = header.ToUInt16(0xE),
Colors = depth,
Mode = header.ToUInt16(0x12),
};
return(info);
}
public Reader(IBinaryStream input, CrxMetaData info)
{
m_width = (int)info.Width;
m_height = (int)info.Height;
m_bpp = info.BPP;
m_compression = info.Compression;
m_flags = info.CompressionFlags;
m_mode = info.Mode;
switch (m_bpp)
{
case 24: Format = PixelFormats.Bgr24; break;
case 32: Format = PixelFormats.Bgra32; break;
case 8: Format = PixelFormats.Indexed8; break;
default: throw new InvalidFormatException();
}
m_stride = (m_width * m_bpp / 8 + 3) & ~3;
m_output = new byte[m_height * m_stride];
m_input = input;
m_input.Position = 0x14;
if (8 == m_bpp)
{
ReadPalette(info.Colors);
}
}
} // 'CRXG'
public override ImageMetaData ReadMetaData(Stream stream)
{
var header = new byte[0x14];
if (header.Length != stream.Read(header, 0, header.Length))
{
return(null);
}
int depth = LittleEndian.ToInt16(header, 0x10);
var info = new CrxMetaData
{
Width = LittleEndian.ToUInt16(header, 8),
Height = LittleEndian.ToUInt16(header, 10),
OffsetX = LittleEndian.ToInt16(header, 4),
OffsetY = LittleEndian.ToInt16(header, 6),
BPP = 0 == depth ? 24 : 1 == depth ? 32 : 8,
Compression = LittleEndian.ToUInt16(header, 0xC),
Colors = depth,
Mode = LittleEndian.ToUInt16(header, 0x12),
};
if (info.Compression != 1 && info.Compression != 2)
{
return(null);
}
return(info);
}
public Reader(IBinaryStream input, CrxMetaData info)
{
m_width = (int)info.Width;
m_height = (int)info.Height;
m_bpp = info.BPP;
m_compression = info.Compression;
m_flags = info.CompressionFlags;
m_mode = info.Mode;
Format = CheckFormat(m_bpp);
m_stride = (m_width * m_bpp / 8 + 3) & ~3;
m_output = new byte[m_height * m_stride];
m_input = input;
m_input.Position = 0x14;
if (8 == m_bpp)
{
ReadPalette(info.Colors);
}
}
public Writer(byte[] input,
BinaryWriter output,
CrxMetaData info)
{
m_width = (int)info.Width;
m_height = (int)info.Height;
m_bpp = info.BPP;
m_compression = info.Compression;
m_flags = info.CompressionFlags;
m_mode = info.Mode;
Format = CheckFormat(m_bpp);
m_stride = (m_width * m_bpp / 8 + 3) & ~3;
m_input = input;
m_output = output;
m_output.Seek(0x14, SeekOrigin.Begin);
if (8 == m_bpp)
{
ReadPalette(info.Colors);
}
}
