/// <summary>
/// Crops the image to a centered square.
/// Make sure that if you're pulling the source image from a stream,
/// the stream remains open.
/// </summary>
/// <param name="img"></param>
/// <returns></returns>
public static byte[] CropImageToSquare(Image img)
{
CropDimensionHelper d = GetCropDimensions(img.Width, img.Height);
Rectangle cropArea = CreateRectangleFromDimensions(d);
Bitmap bmp = CreateBitmapFromDimensions(d.Smaller, d.Smaller);
DrawSquareOntoBitmap(bmp, img, cropArea);
byte[] squareBytes = GetImageBytes(bmp, img.RawFormat);
return(squareBytes);
}
/// <summary>
/// Gets dimensions for our square.
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
/// <returns></returns>
private static CropDimensionHelper GetCropDimensions(int width, int height)
{
CropDimensionHelper d = new CropDimensionHelper();
if (width < height)
{
d.WidthStart = 0;
d.HeightStart = (height / 2) - (width / 2);
d.Smaller = width;
}
else
{
d.HeightStart = 0;
d.WidthStart = (width / 2) - (height / 2);
d.Smaller = height;
}
return(d);
}
/// <summary>
/// Creates a crop area from our dimensions.
/// </summary>
/// <param name="d"></param>
/// <returns></returns>
private static Rectangle CreateRectangleFromDimensions(CropDimensionHelper d)
{
Rectangle cropArea = new Rectangle(d.WidthStart, d.HeightStart, d.Smaller, d.Smaller);
return(cropArea);
}
