/// <summary>
/// Resizes the current image to the given dimensions using Content Aware Resizing.
/// </summary>
/// <param name="factory">
/// The current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class
/// that this method extends.
/// </param>
/// <param name="size">
/// The <see cref="T:System.Drawing.Size"/> containing the width and height to set the image to.
/// </param>
/// <returns>
/// The current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class.
/// </returns>
public static ImageFactory ContentAwareResize(this ImageFactory factory, Size size)
{
if (factory.ShouldProcess)
{
int width = size.Width;
int height = size.Height;
ContentAwareResizeLayer resizeLayer = new ContentAwareResizeLayer(new Size(width, height));
return(factory.ContentAwareResize(resizeLayer));
}
return(factory);
}
/// <summary>
/// Resizes the current image to the given dimensions using Content Aware Resizing.
/// </summary>
/// <param name="factory">
/// The current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class
/// that this method extends.
/// </param>
/// <param name="layer">
/// The <see cref="ContentAwareResizeLayer"/> containing the properties required to resize the image.
/// </param>
/// <returns>
/// The current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class.
/// </returns>
public static ImageFactory ContentAwareResize(this ImageFactory factory, ContentAwareResizeLayer layer)
{
if (factory.ShouldProcess)
{
Dictionary <string, string> resizeSettings = new Dictionary <string, string> {
{ "MaxWidth", layer.Size.Width.ToString("G") }, { "MaxHeight", layer.Size.Height.ToString("G") }
};
ContentAwareResize resize = new ContentAwareResize {
DynamicParameter = layer, Settings = resizeSettings
};
factory.CurrentImageFormat.ApplyProcessor(resize.ProcessImage, factory);
}
return(factory);
}
/// <summary>
/// Processes the image.
/// </summary>
/// <param name="factory">
/// The current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class containing
/// the image to process.
/// </param>
/// <returns>
/// The processed image from the current instance of the <see cref="T:ImageProcessor.ImageFactory"/> class.
/// </returns>
public Image ProcessImage(ImageFactory factory)
{
string fileName = Guid.NewGuid().ToString();
// Use bmp's as the temporary files since they are lossless and support transparency.
string sourcePath = Path.Combine(CairBootstrapper.CairPath, fileName + ".bmp");
string resizedPath = Path.Combine(CairBootstrapper.CairPath, fileName + "-r.bmp");
// Gather the parameters.
ContentAwareResizeLayer layer = (ContentAwareResizeLayer)this.DynamicParameter;
int width = layer.Size.Width;
int height = layer.Size.Height;
int timeout = layer.Timeout > 0 ? layer.Timeout : 60000;
int defaultMaxWidth;
int defaultMaxHeight;
int.TryParse(this.Settings["MaxWidth"], NumberStyles.Any, CultureInfo.InvariantCulture, out defaultMaxWidth);
int.TryParse(this.Settings["MaxHeight"], NumberStyles.Any, CultureInfo.InvariantCulture, out defaultMaxHeight);
Bitmap newImage = null;
Image image = factory.Image;
try
{
int sourceWidth = image.Width;
int sourceHeight = image.Height;
// Fractional variants for preserving aspect ratio.
double percentHeight = Math.Abs(height / (double)sourceHeight);
double percentWidth = Math.Abs(width / (double)sourceWidth);
int maxWidth = defaultMaxWidth > 0 ? defaultMaxWidth : int.MaxValue;
int maxHeight = defaultMaxHeight > 0 ? defaultMaxHeight : int.MaxValue;
// If height or width is not passed we assume that the standard ratio is to be kept.
if (height == 0)
{
height = (int)Math.Ceiling(sourceHeight * percentWidth);
}
if (width == 0)
{
width = (int)Math.Ceiling(sourceWidth * percentHeight);
}
if (width > 0 && height > 0 && width <= maxWidth && height <= maxHeight)
{
// Save the temporary bitmap.
image.Save(sourcePath, ImageFormat.Bmp);
// Process the image using the CAIR executable.
string arguments = string.Format(
" -I \"{0}\" -O \"{1}\" -C {2} -X {3} -Y {4} -E {5} -T {6} -R {7}",
sourcePath,
resizedPath,
(int)layer.ConvolutionType,
width,
height,
(int)layer.EnergyFunction,
layer.Parallelize ? Math.Min(4, Environment.ProcessorCount) : 1,
(int)layer.OutputType);
if (!string.IsNullOrWhiteSpace(layer.WeightPath))
{
arguments = string.Format("{0} -W {1}", arguments, layer.WeightPath);
}
this.ProcessCairImage(arguments, timeout);
// Assign the new image.
newImage = new Bitmap(resizedPath);
newImage.MakeTransparent();
// Reassign the image.
image.Dispose();
image = newImage;
}
}
catch (Exception ex)
{
if (newImage != null)
{
newImage.Dispose();
}
throw new ImageProcessingException("Error processing image with " + this.GetType().Name, ex);
}
finally
{
FileInfo sourceFileInfo = new FileInfo(sourcePath);
if (sourceFileInfo.Exists)
{
sourceFileInfo.Delete();
}
FileInfo resizedFileInfo = new FileInfo(resizedPath);
if (resizedFileInfo.Exists)
{
resizedFileInfo.Delete();
}
}
return(image);
}