tcc/ASP.NET/Services/ImageService.cs

75 lines
2.5 KiB
C#

using ImageMagick;
namespace TCC.Services
{
public class ImageService
{
public ImageService() { }
public MagickImage BoxBlurImage(Stream imageStream, int radius)
{
var image = new MagickImage(imageStream);
var blurredImage = new MagickImage(image);
blurredImage = BoxBlurImageSeparable(image, blurredImage, radius, 0);
blurredImage = BoxBlurImageSeparable(blurredImage, blurredImage, 0, radius);
return blurredImage;
}
private MagickImage BoxBlurImageSeparable(MagickImage image, MagickImage blurredImage, int radiusX, int radiusY)
{
var pixels = image.GetPixels();
var blurredPixels = blurredImage.GetPixelsUnsafe();
foreach (var pixel in pixels)
{
int x = pixel.X,
y = pixel.Y;
long rTotal = 0, gTotal = 0, bTotal = 0;
int pixelCount = 0;
for (int offsetY = -radiusY; offsetY <= radiusY; offsetY++)
{
for (int offsetX = -radiusX; offsetX <= radiusX; offsetX++)
{
int newX = x + offsetX;
int newY = y + offsetY;
if (newX >= 0 && newX < image.Width && newY >= 0 && newY < image.Height)
{
var pixelColor = pixels[newX, newY];
rTotal += pixelColor.GetChannel(0);
gTotal += pixelColor.GetChannel(1);
bTotal += pixelColor.GetChannel(2);
pixelCount++;
}
}
}
blurredPixels[x, y].SetChannel(0, Convert.ToUInt16(rTotal / pixelCount));
blurredPixels[x, y].SetChannel(1, Convert.ToUInt16(gTotal / pixelCount));
blurredPixels[x, y].SetChannel(2, Convert.ToUInt16(bTotal / pixelCount));
}
return blurredImage;
}
public void SaveImage(Stream fileStream)
{
var file = File.Create("image.png");
fileStream.CopyToAsync(file);
file.Close();
}
public byte[] GetSimpleImage()
{
return File.ReadAllBytes("static/small-image.png");
}
public byte[] GetBigImage()
{
return File.ReadAllBytes("static/big-image.png");
}
}
}