public ImageProcessTarget(Size targetSize, ImageCropType cropType, float cropWidthPercentage, float cropHeightPercentage)
{
this.ScaleSize = targetSize;
this.CropType = cropType;
this.CropSize = new Size(
(int)Math.Round(this.ScaleSize.Width * cropWidthPercentage, 0),
(int)Math.Round(this.ScaleSize.Height * cropHeightPercentage, 0)
);
}
/// <summary>
/// Crops an image using the specified crop type, width and height
/// <para>This method makes use of Crop(Bitmap image, Rectangle rectangle), see that method for more information</para>
/// </summary>
/// <param name="image">The image to crop</param>
/// <param name="imageCropType">The type of crop</param>
/// <param name="width">The desired width</param>
/// <param name="height">The desired height</param>
/// <returns>A new image of with the specified crop</returns>
public Bitmap Crop(Bitmap image, ImageCropType imageCropType, int width, int height)
{
var x = 0;
var y = 0;
switch (imageCropType)
{
case ImageCropType.Center:
x = (image.Width - width) / 2;
y = (image.Height - height) / 2;
break;
case ImageCropType.TopRight:
x = image.Width - width;
break;
case ImageCropType.BottomLeft:
y = image.Height - height;
break;
case ImageCropType.BottomRight:
x = image.Width - width;
y = image.Height - height;
break;
case ImageCropType.LeftCenter:
y = (image.Height - height) / 2;
break;
case ImageCropType.TopCenter:
x = (image.Width - width) / 2;
break;
case ImageCropType.RightCenter:
x = image.Width - width;
y = (image.Height - height) / 2;
break;
case ImageCropType.BottomCenter:
x = (image.Width - width) / 2;
y = image.Height - height;
break;
default:
// this will be TopLeft (0, 0)
break;
}
return this.Crop(image, new Rectangle(x, y, width, height));
}
public void SetAppLogoImageCrop(ImageCropType appLogoImageCrop)
{
this.appLogoImageCrop = appLogoImageCrop;
}
private void CropCornerAndTestForBlack(ImageCropType type, Rectangle blackRect, float blackPortion = 0.25f)
{
var source = ResHelper.LoadImage("croppable.jpg");
var result = this.subject.Crop(source, type, 100, 100);
Assert.IsNotNull(result);
// allowing 2 * width as epsilon to handle integer division / rounding
Assert.AreEqual(result.Width * result.Height * (1 - blackPortion), ResHelper.PixelCount(result, Color.White), result.Width * 2);
Assert.AreEqual(result.Width * result.Height * blackPortion, ResHelper.PixelCount(result, Color.Black, blackRect), result.Width * 2);
}
