public Image <TPixel> Decode <TPixel>(Configuration configuration, Stream stream, CancellationToken token) where TPixel : unmanaged, IPixel <TPixel>
{
using (Stream bmpStream = DibToBmpStream(stream))
{
return(decoder.Decode <TPixel>(configuration, bmpStream, token));
}
}
public static void SaveToJpeg(Stream image, string destination)
{
if (image == null)
{
return;
}
image.Position = 0;
var bmpDecoder = new BmpDecoder();
var img = bmpDecoder.Decode(Configuration.Default, image);
if (img == null)
{
return;
}
var width = (int)(img.Width * 0.5D);
var height = (int)(img.Height * 0.5D);
img.Mutate(context => context.Resize(new ResizeOptions
{
Mode = ResizeMode.Max,
Size = new Size(width, height)
}));
using var ms = new MemoryStream();
img.Save(ms, JpegFormat.Instance);
img.Dispose();
File.WriteAllBytes(destination, ms.ToArray());
}
public void Decode_VerifyRatio(string imagePath, int xResolution, int yResolution, PixelResolutionUnit resolutionUnit)
{
var testFile = TestFile.Create(imagePath);
using (var stream = new MemoryStream(testFile.Bytes, false))
{
var decoder = new BmpDecoder();
using (Image <Rgba32> image = decoder.Decode <Rgba32>(Configuration.Default, stream))
{
ImageMetadata meta = image.Metadata;
Assert.Equal(xResolution, meta.HorizontalResolution);
Assert.Equal(yResolution, meta.VerticalResolution);
Assert.Equal(resolutionUnit, meta.ResolutionUnits);
}
}
}
public static ImageResult FromStream(Stream stream, ColorComponents?requiredComponents = null,
bool use8BitsPerChannel = true)
{
ImageResult result = null;
if (JpgDecoder.Test(stream))
{
result = JpgDecoder.Decode(stream, requiredComponents);
}
else if (PngDecoder.Test(stream))
{
result = PngDecoder.Decode(stream, requiredComponents);
}
else if (BmpDecoder.Test(stream))
{
result = BmpDecoder.Decode(stream, requiredComponents);
}
else if (GifDecoder.Test(stream))
{
result = GifDecoder.Decode(stream, requiredComponents);
}
else if (PsdDecoder.Test(stream))
{
result = PsdDecoder.Decode(stream, requiredComponents);
}
else if (TgaDecoder.Test(stream))
{
result = TgaDecoder.Decode(stream, requiredComponents);
}
if (result == null)
{
Decoder.stbi__err("unknown image type");
}
if (use8BitsPerChannel && result.BitsPerChannel != 8)
{
result.Data = Conversion.stbi__convert_16_to_8(result.Data, result.Width, result.Height,
(int)result.ColorComponents);
}
return(result);
}
