public static void Resize(ResizeRequest request)
{
ValidateRequest(request);
using (var imgToResize = Image.FromFile(request.OriginalImageFilePath))
{
var sourceWidth = imgToResize.Width;
var sourceHeight = imgToResize.Height;
var nPercentW = (request.NewImageSize.Width/(float) sourceWidth);
var nPercentH = (request.NewImageSize.Height/(float) sourceHeight);
var nPercent = nPercentH < nPercentW ? nPercentH : nPercentW;
var destWidth = (int) (sourceWidth*nPercent);
var destHeight = (int) (sourceHeight*nPercent);
using (var b = new Bitmap(destWidth, destHeight))
using (var g = Graphics.FromImage(b))
{
g.SmoothingMode = SmoothingMode.HighSpeed;
g.PixelOffsetMode = PixelOffsetMode.HighSpeed;
g.CompositingQuality = CompositingQuality.HighSpeed;
g.DrawImage(imgToResize, 0, 0, destWidth, destHeight);
b.Save(request.NewImageFilePath);
imgToResize.Dispose();
}
}
}
private static void ValidateRequest(ResizeRequest request)
{
var validation = FileAndDirectoryValidator.IsValid(request.NewImageFilePath);
if(validation.Valid) return;
throw new Exception(validation.Errors.First());
}