private static void ResizeImage(int width, int height, int quality, string options, IMagickImage magickImage)
{
magickImage.Quality = quality;
magickImage.Strip();
if (options.Contains("g")) //grayscale
{
magickImage.Grayscale(PixelIntensityMethod.Average);
}
if (width == magickImage.BaseWidth && height == magickImage.BaseHeight)
{
return;
}
else if (options.Contains("f") || options.Contains("t"))
{
magickImage.Resize(width, height);
}
else
{
var magickGeometry = new MagickGeometry(width, height)
{
IgnoreAspectRatio = false, //保持长宽比
FillArea = true
};
magickImage.Resize(magickGeometry);
magickImage.Crop(magickGeometry, Gravity.Center);
}
}
private static void ApplyEffect(IMagickImage image, ThumbnailEffectType effect)
{
switch (effect)
{
case ThumbnailEffectType.Grayscale:
image.Grayscale();
break;
case ThumbnailEffectType.Sepia:
image.SepiaTone();
break;
}
}
private static void ResizeImage(int requestWidth, int requestHeight, int quality, string options, IMagickImage image)
{
image.Quality = quality;
image.Strip();
if (options.Contains("g")) //grayscale
{
image.Grayscale(PixelIntensityMethod.Average);
}
if (image.BaseWidth == requestWidth && image.BaseHeight == requestHeight) //requested image is same size
{
return;
}
if (requestWidth == 0 && requestHeight == 0) //requested image is same size
{
return;
}
if (options.Contains("f") || options.Contains("t")) //scale with aspect of image
{
var size = new MagickGeometry(requestWidth, requestHeight);
image.Resize(size);
}
else if (requestWidth == 0 || requestHeight == 0) //scale with aspect of image
{
var size = new MagickGeometry(requestWidth, requestHeight);
image.Resize(size);
}
else // This will resize the image to a fixed size without maintaining the aspect ratio.
{
var size = new MagickGeometry(requestWidth, requestHeight)
{
IgnoreAspectRatio = false, //keep aspect ratio!
FillArea = true
};
image.Resize(size);
image.Crop(size, Gravity.Center);
}
}
public void Grayscale()
{
_current.Grayscale();
}