/// <summary>
/// Encodes the image to the specified stream from the <see cref="ImageFrame{TPixel}"/>.
/// </summary>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <param name="image">The <see cref="ImageFrame{TPixel}"/> to encode from.</param>
/// <param name="stream">The <see cref="Stream"/> to encode the image data to.</param>
public void Encode <TPixel>(Image <TPixel> image, Stream stream)
where TPixel : struct, IPixel <TPixel>
{
Guard.NotNull(image, nameof(image));
Guard.NotNull(stream, nameof(stream));
// Cast to int will get the bytes per pixel
short bpp = (short)(8 * (int)this.bitsPerPixel);
int bytesPerLine = 4 * (((image.Width * bpp) + 31) / 32);
this.padding = bytesPerLine - (image.Width * (int)this.bitsPerPixel);
var infoHeader = new BmpInfoHeader(
headerSize: BmpInfoHeader.Size,
height: image.Height,
width: image.Width,
bitsPerPixel: bpp,
planes: 1,
imageSize: image.Height * bytesPerLine,
clrUsed: 0,
clrImportant: 0);
var fileHeader = new BmpFileHeader(
type: 19778, // BM
offset: 54,
reserved: 0,
fileSize: 54 + infoHeader.ImageSize);
#if NETCOREAPP2_1
Span <byte> buffer = stackalloc byte[40];
#else
byte[] buffer = new byte[40];
#endif
fileHeader.WriteTo(buffer);
stream.Write(buffer, 0, BmpFileHeader.Size);
infoHeader.WriteTo(buffer);
stream.Write(buffer, 0, 40);
this.WriteImage(stream, image.Frames.RootFrame);
stream.Flush();
}
/// <summary>
/// Encodes the image to the specified stream from the <see cref="ImageFrame{TPixel}"/>.
/// </summary>
/// <typeparam name="TPixel">The pixel format.</typeparam>
/// <param name="image">The <see cref="ImageFrame{TPixel}"/> to encode from.</param>
/// <param name="stream">The <see cref="Stream"/> to encode the image data to.</param>
public void Encode <TPixel>(Image <TPixel> image, Stream stream)
where TPixel : struct, IPixel <TPixel>
{
Guard.NotNull(image, nameof(image));
Guard.NotNull(stream, nameof(stream));
// Cast to int will get the bytes per pixel
short bpp = (short)(8 * (int)this.bitsPerPixel);
int bytesPerLine = 4 * (((image.Width * bpp) + 31) / 32);
this.padding = bytesPerLine - (image.Width * (int)this.bitsPerPixel);
// Set Resolution.
ImageMetaData meta = image.MetaData;
int hResolution = 0;
int vResolution = 0;
if (meta.ResolutionUnits != PixelResolutionUnit.AspectRatio)
{
if (meta.HorizontalResolution > 0 && meta.VerticalResolution > 0)
{
switch (meta.ResolutionUnits)
{
case PixelResolutionUnit.PixelsPerInch:
hResolution = (int)Math.Round(UnitConverter.InchToMeter(meta.HorizontalResolution));
vResolution = (int)Math.Round(UnitConverter.InchToMeter(meta.VerticalResolution));
break;
case PixelResolutionUnit.PixelsPerCentimeter:
hResolution = (int)Math.Round(UnitConverter.CmToMeter(meta.HorizontalResolution));
vResolution = (int)Math.Round(UnitConverter.CmToMeter(meta.VerticalResolution));
break;
case PixelResolutionUnit.PixelsPerMeter:
hResolution = (int)Math.Round(meta.HorizontalResolution);
vResolution = (int)Math.Round(meta.VerticalResolution);
break;
}
}
}
var infoHeader = new BmpInfoHeader(
headerSize: BmpInfoHeader.Size,
height: image.Height,
width: image.Width,
bitsPerPixel: bpp,
planes: 1,
imageSize: image.Height * bytesPerLine,
clrUsed: 0,
clrImportant: 0,
xPelsPerMeter: hResolution,
yPelsPerMeter: vResolution);
var fileHeader = new BmpFileHeader(
type: 19778, // BM
offset: 54,
reserved: 0,
fileSize: 54 + infoHeader.ImageSize);
#if NETCOREAPP2_1
Span <byte> buffer = stackalloc byte[40];
#else
byte[] buffer = new byte[40];
#endif
fileHeader.WriteTo(buffer);
stream.Write(buffer, 0, BmpFileHeader.Size);
infoHeader.WriteTo(buffer);
stream.Write(buffer, 0, 40);
this.WriteImage(stream, image.Frames.RootFrame);
stream.Flush();
}