private static RectangleF GetImageCenterCrop(Size imageSize, Size maxImageSize)
{
PointF imageCenterPosition = UserPhotoUtilities.GetImageCenterPosition(imageSize, maxImageSize);
float width = (float)Math.Min(imageSize.Width, maxImageSize.Width);
float height = (float)Math.Min(imageSize.Height, maxImageSize.Height);
return(new RectangleF(imageCenterPosition, new SizeF(width, height)));
}
private static float GetHorizontalScaleFactor(Size imageSize, Size maxImageSize)
{
float result = 1f;
if (UserPhotoUtilities.NeedsHorizontalCrop(imageSize, maxImageSize))
{
result = (float)maxImageSize.Width / (float)imageSize.Width;
}
return(result);
}
private static float GetVerticalScaleFactor(Size imageSize, Size maxImageSize)
{
float result = 1f;
if (UserPhotoUtilities.NeedsVerticalCrop(imageSize, maxImageSize))
{
result = (float)maxImageSize.Height / (float)imageSize.Height;
}
return(result);
}
private static PointF GetImageCenterPosition(Size imageSize, Size maxImageSize)
{
PointF result = new PointF(0f, 0f);
if (UserPhotoUtilities.NeedsHorizontalCrop(imageSize, maxImageSize))
{
result.X = (float)(imageSize.Width - maxImageSize.Width) * 0.5f;
}
if (UserPhotoUtilities.NeedsVerticalCrop(imageSize, maxImageSize))
{
result.Y = (float)(imageSize.Height - maxImageSize.Height) * 0.35f;
}
return(result);
}
public static Dictionary <UserPhotoSize, Image> GetAllScaleCroppedImages(Stream originalImageStream)
{
Util.ThrowOnNullArgument(originalImageStream, "originalImageStream");
Dictionary <UserPhotoSize, Image> result;
using (Image imageFromStream = UserPhotoUtilities.GetImageFromStream(originalImageStream, true))
{
Dictionary <UserPhotoSize, Image> dictionary = new Dictionary <UserPhotoSize, Image>();
foreach (UserPhotoSize userPhotoSize in (UserPhotoSize[])Enum.GetValues(typeof(UserPhotoSize)))
{
dictionary.Add(userPhotoSize, UserPhotoUtilities.GetImageOfSize(imageFromStream, userPhotoSize));
}
result = dictionary;
}
return(result);
}
private static Image GetScaledAndCroppedImage(Image image, Size maxImageSize)
{
if (maxImageSize.Width > image.Size.Width || maxImageSize.Height > image.Size.Height)
{
return(null);
}
Size imageScaledSize = UserPhotoUtilities.GetImageScaledSize(image.Size, maxImageSize);
Image result;
using (Bitmap bitmap = new Bitmap(imageScaledSize.Width, imageScaledSize.Height))
{
using (Graphics graphics = Graphics.FromImage(bitmap))
{
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.DrawImage(image, 0, 0, bitmap.Width, bitmap.Height);
}
RectangleF imageCenterCrop = UserPhotoUtilities.GetImageCenterCrop(imageScaledSize, maxImageSize);
result = bitmap.Clone(imageCenterCrop, bitmap.PixelFormat);
}
return(result);
}
private static Image GetImageOfSize(Image originalImage, UserPhotoSize size)
{
Util.ThrowOnNullArgument(originalImage, "originalImage");
EnumValidator.ThrowIfInvalid <UserPhotoSize>(size, "size");
return(UserPhotoUtilities.GetScaledAndCroppedImage(originalImage, UserPhotoDimensions.GetImageSize(size)));
}
private static Size GetImageScaledSize(Size imageSize, Size maxImageSize)
{
float scale = Math.Max(UserPhotoUtilities.GetVerticalScaleFactor(imageSize, maxImageSize), UserPhotoUtilities.GetHorizontalScaleFactor(imageSize, maxImageSize));
return(UserPhotoUtilities.GetScaledSize(imageSize, scale));
}
