public Image SmartScaleCrop(Image sourceImage, SmartScaleCropArguments args)
{
string fingerprint = ImageOptimizationHelper.GetImageFingerprint(sourceImage);
var entry = OptimizationManager.GetImageOptimizationLogEntrys().Where(e => e.Fingerprint == fingerprint).FirstOrDefault();
int focalPointX = 0;
int focalPointY = 0;
int focalPointWidth = 0;
int focalPointHeight = 0;
int focalPointAnchor = 0;
if (entry != null)
{
var sfImage = LibManager.GetImage(entry.ImageId);
focalPointX = sfImage.GetValue <int>("FocalPointX");
focalPointY = sfImage.GetValue <int>("FocalPointY");
focalPointWidth = sfImage.GetValue <int>("FocalPointWidth");
focalPointHeight = sfImage.GetValue <int>("FocalPointHeight");
focalPointAnchor = sfImage.GetValue <int>("FocalPointAnchor");
if (focalPointX != 0 && focalPointY != 0)
{
return(Process(sourceImage, focalPointX, focalPointY, focalPointWidth, focalPointHeight, focalPointAnchor, args));
}
}
return(base.Crop(sourceImage, args));
}
protected virtual void ValidateSmartScaleCropArguments(object argument)
{
SmartScaleCropArguments cropArgument = argument as SmartScaleCropArguments;
if (cropArgument == null)
{
object[] fullName = new object[] { typeof(SmartScaleCropArguments).FullName };
throw new InvalidOperationException("Argument of type '{0}' is expected".Arrange(fullName));
}
base.ValidateCropToAreaArguments(argument);
}
public Image Process(Image source, int focalPointX, int focalPointY, int focalPointWidth, int focalPointHeight, int focalPointAnchor, SmartScaleCropArguments args)
{
int cropX = focalPointX;
int cropY = focalPointY;
float s = 1;
bool scaleDown = (focalPointWidth > args.Width) || (focalPointHeight > args.Height);
bool scaleUp = ((focalPointWidth < args.Width) || (focalPointHeight < args.Height)) && args.ScaleUp;
bool shouldScale = scaleDown || scaleUp;
Image scaledSource = source;
if (args.PreserveFocalArea && shouldScale)
{
if (((float)focalPointWidth / (float)args.Width > (float)focalPointHeight / (float)args.Height))
{
s = (float)args.Width / (float)focalPointWidth;
}
else
{
s = (float)args.Height / (float)focalPointHeight;
}
ImagesHelper.TryResizeImage(source, (int)Math.Round(source.Width * s, 0), (int)Math.Round(source.Height * s, 0), out scaledSource, args.Quality);
}
cropX = Math.Min(Math.Max((int)Math.Round(focalPointX * s + focalPointWidth * s / 2 - args.Width / 2, 0), 0), scaledSource.Width - args.Width);
if (args.Width > scaledSource.Width)
{
cropX = (scaledSource.Width - args.Width) / 2;
}
cropY = Math.Min(Math.Max((int)Math.Round(focalPointY * s + focalPointHeight * s / 2 - args.Height / 2, 0), 0), scaledSource.Height - args.Height);
if (args.Height > scaledSource.Height)
{
cropY = (scaledSource.Height - args.Height) / 2;
}
if (!args.PreserveFocalArea)
{
switch (focalPointAnchor)
{
case 0:
break;
case 1:
cropY = focalPointY;
break;
case 2:
cropX = Math.Max((focalPointX + focalPointWidth) - args.Width, 0);
break;
case 3:
cropY = Math.Max((focalPointY + focalPointHeight) - args.Height, 0);
break;
case 4:
cropX = focalPointX;
break;
}
}
Rectangle crop = new Rectangle(cropX, cropY, args.Width, args.Height);
var bmp = new Bitmap(crop.Width, crop.Height);
using (var gr = Graphics.FromImage(bmp))
{
gr.DrawImage(scaledSource, new Rectangle(0, 0, bmp.Width, bmp.Height), crop, GraphicsUnit.Pixel);
}
return(bmp);
}
