private void WriteInfo(EndianBinaryWriter writer, BmpInfoHeader infoHeader)
{
writer.Write(infoHeader.HeaderSize);
writer.Write(infoHeader.Width);
writer.Write(infoHeader.Height);
writer.Write(infoHeader.Planes);
writer.Write(infoHeader.BitsPerPixel);
writer.Write((int)infoHeader.Compression);
writer.Write(infoHeader.ImageSize);
writer.Write(infoHeader.XPelsPerMeter);
writer.Write(infoHeader.YPelsPerMeter);
writer.Write(infoHeader.ClrUsed);
writer.Write(infoHeader.ClrImportant);
}
private void ReadInfoHeader()
{
byte[] data = new byte[BmpInfoHeader.size];
currentStream.Read(data, 0, BmpInfoHeader.size);
infoHeader = new BmpInfoHeader {
HeaderSize = BitConverter.ToInt32(data, 0),
Width = BitConverter.ToInt32(data, 4),
Height = BitConverter.ToInt32(data, 8),
Planes = BitConverter.ToInt16(data, 12),
BitsPerPixel = BitConverter.ToInt16(data, 14),
ImageSize = BitConverter.ToInt32(data, 20),
XPelsPerMeter = BitConverter.ToInt32(data, 24),
YPelsPerMeter = BitConverter.ToInt32(data, 28),
ClrUsed = BitConverter.ToInt32(data, 32),
ClrImportant = BitConverter.ToInt32(data, 36),
Compression = (BmpCompression)BitConverter.ToInt32(data, 16)
};
}
public void Encode(ImageBase image, Stream stream, BmpBitsPerPixel bitsPerPixel)
{
if (image == null || stream == null)
{
throw new ArgumentNullException();
}
bmpBitsPerPixel = bitsPerPixel;
int rowWidth = image.Width;
// TODO: Check this for varying file formats.
int amount = (image.Width * (int)bmpBitsPerPixel) % 4;
if (amount != 0)
{
rowWidth += 4 - amount;
}
// Do not use IDisposable pattern here as we want to preserve the stream.
EndianBinaryWriter writer = new EndianBinaryWriter(EndianBitConverter.Little, stream);
int bpp = (int)bmpBitsPerPixel;
BmpFileHeader fileHeader = new BmpFileHeader {
Type = 19778, // BM
Offset = 54,
FileSize = 54 + image.Height * rowWidth * bpp
};
BmpInfoHeader infoHeader = new BmpInfoHeader {
HeaderSize = 40,
Height = image.Height,
Width = image.Width,
BitsPerPixel = (short)(8 * bpp),
Planes = 1,
ImageSize = image.Height * rowWidth * bpp,
ClrUsed = 0,
ClrImportant = 0
};
WriteHeader(writer, fileHeader);
WriteInfo(writer, infoHeader);
WriteImage(writer, image);
writer.Flush();
}
public void Encode(ImageBase image, Stream stream, BmpBitsPerPixel bitsPerPixel)
{
if (image == null || stream == null){
throw new ArgumentNullException();
}
bmpBitsPerPixel = bitsPerPixel;
int rowWidth = image.Width;
// TODO: Check this for varying file formats.
int amount = (image.Width*(int) bmpBitsPerPixel)%4;
if (amount != 0){
rowWidth += 4 - amount;
}
// Do not use IDisposable pattern here as we want to preserve the stream.
EndianBinaryWriter writer = new EndianBinaryWriter(EndianBitConverter.Little, stream);
int bpp = (int) bmpBitsPerPixel;
BmpFileHeader fileHeader = new BmpFileHeader{
Type = 19778, // BM
Offset = 54,
FileSize = 54 + image.Height*rowWidth*bpp
};
BmpInfoHeader infoHeader = new BmpInfoHeader{
HeaderSize = 40,
Height = image.Height,
Width = image.Width,
BitsPerPixel = (short) (8*bpp),
Planes = 1,
ImageSize = image.Height*rowWidth*bpp,
ClrUsed = 0,
ClrImportant = 0
};
WriteHeader(writer, fileHeader);
WriteInfo(writer, infoHeader);
WriteImage(writer, image);
writer.Flush();
}
private void WriteInfo(EndianBinaryWriter writer, BmpInfoHeader infoHeader)
{
writer.Write(infoHeader.HeaderSize);
writer.Write(infoHeader.Width);
writer.Write(infoHeader.Height);
writer.Write(infoHeader.Planes);
writer.Write(infoHeader.BitsPerPixel);
writer.Write((int) infoHeader.Compression);
writer.Write(infoHeader.ImageSize);
writer.Write(infoHeader.XPelsPerMeter);
writer.Write(infoHeader.YPelsPerMeter);
writer.Write(infoHeader.ClrUsed);
writer.Write(infoHeader.ClrImportant);
}
