private static void WriteBitmap(string fileName,
byte[] buff,
int width,
int height,
int depthBytes,
RGBQUAD[] palArray,
bool skipPalette)
{
var bmf = new BITMAPFILEHEADER();
var bmi = new BITMAPINFOHEADER();
bmf.bfType = 0x4D42;
var paletteSize = skipPalette ? 0 : (Marshal.SizeOf <RGBQUAD>() * (palArray?.Length ?? 0));
var offBits = Marshal.SizeOf <BITMAPFILEHEADER>() + Marshal.SizeOf <BITMAPINFOHEADER>() + paletteSize;
bmf.bfSize = (uint)(offBits + buff.Length);
bmf.bfOffBits = (uint)offBits;
bmi.biSize = (uint)Marshal.SizeOf <BITMAPINFOHEADER>();
bmi.biWidth = width;
bmi.biHeight = height;
bmi.biPlanes = 1;
bmi.biBitCount = (ushort)(depthBytes * 8);
var fileStream = OpenFileOrDie(fileName, FileMode.Create);
fileStream.Write(StructToBytes(bmf), 0, Marshal.SizeOf <BITMAPFILEHEADER>());
fileStream.Write(StructToBytes(bmi), 0, Marshal.SizeOf <BITMAPINFOHEADER>());
var paletteAndMap = depthBytes == 1 && !skipPalette
? (palArray ?? throw new ArgumentNullException(nameof(palArray), "A palette must exist for 8Bpp image."))
.SelectMany(StructToBytes).Concat(buff).ToArray()
: buff;
fileStream.Write(paletteAndMap, 0, paletteAndMap.Length);
fileStream.Close();
}
public DecodingData(BITMAPFILEHEADER bmf, BITMAPINFOHEADER bmi, byte[] encodedData, RGBQUAD[] pal, byte[] alphaBuff, byte[] decodedData)
{
Bmf = bmf;
Bmi = bmi;
EncodedData = encodedData?.ToArray();
PalArray = pal?.ToArray();
AlphaBuff = alphaBuff?.ToArray();
DecodedData = decodedData?.ToArray();
}
private static void ReadBitmap(string fileName, out byte[] buffer, out long length, out BITMAPFILEHEADER bmf, out BITMAPINFOHEADER bmi)
{
var fileStream = OpenFileOrDie(fileName, FileMode.Open);
try
{
var bmfB = new byte[Marshal.SizeOf <BITMAPFILEHEADER>()];
var bmiB = new byte[Marshal.SizeOf <BITMAPINFOHEADER>()];
length = fileStream.Length - (bmfB.Length + bmiB.Length);
buffer = new byte[length];
fileStream.Read(bmfB, 0, Marshal.SizeOf <BITMAPFILEHEADER>());
fileStream.Read(bmiB, 0, Marshal.SizeOf <BITMAPINFOHEADER>());
fileStream.Read(buffer, 0, (int)length);
// ReSharper disable once UnusedVariable
bmf = ByteArrayToStructure <BITMAPFILEHEADER>(bmfB);
bmi = ByteArrayToStructure <BITMAPINFOHEADER>(bmiB);
}
finally
{
fileStream.Close();
}
}
public DecodingData(BITMAPFILEHEADER bmf, BITMAPINFOHEADER bmi, byte[] encodedData, RGBQUAD[] pal, byte[] alphaBuff, byte[] decodedData, AGFHDR agfHeader, ACIFHDR acifHeader)
: this(bmf, bmi, encodedData, pal, alphaBuff, decodedData)
{
AgfHeader = agfHeader;
AcifHeader = acifHeader;
}
