public Stream Resize(Stream imageStream, int maxWidthOrHeight)
{
Size size = new Size(maxWidthOrHeight, maxWidthOrHeight);
ResizeLayer layer = new ResizeLayer(size, ResizeMode.Max);
Resizer resizer = new Resizer(layer);
Bitmap bmp = resizer.ResizeImage(Image.FromStream(imageStream));
return ToStream(bmp, ImageFormat.Jpeg);
}
/// <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)
{
Image image = factory.Image;
try
{
ImageLayer imageLayer = this.DynamicParameter;
Bitmap overlay = new Bitmap(imageLayer.Image);
// Set the resolution of the overlay and the image to match.
overlay.SetResolution(image.HorizontalResolution, image.VerticalResolution);
Size size = imageLayer.Size;
int width = image.Width;
int height = image.Height;
int overlayWidth = size != Size.Empty ? Math.Min(width, size.Width) : Math.Min(width, overlay.Width);
int overlayHeight = size != Size.Empty ? Math.Min(height, size.Height) : Math.Min(height, overlay.Height);
Point? position = imageLayer.Position;
int opacity = imageLayer.Opacity;
if (image.Size != overlay.Size || image.Size != new Size(overlayWidth, overlayHeight))
{
// Find the maximum possible dimensions and resize the image.
ResizeLayer layer = new ResizeLayer(new Size(overlayWidth, overlayHeight), ResizeMode.Max);
Resizer resizer = new Resizer(layer) { AnimationProcessMode = factory.AnimationProcessMode };
overlay = resizer.ResizeImage(overlay, factory.FixGamma);
overlayWidth = overlay.Width;
overlayHeight = overlay.Height;
}
// Figure out bounds.
Rectangle parent = new Rectangle(0, 0, width, height);
Rectangle child = new Rectangle(0, 0, overlayWidth, overlayHeight);
// Apply opacity.
if (opacity < 100)
{
overlay = Adjustments.Alpha(overlay, opacity);
}
using (Graphics graphics = Graphics.FromImage(image))
{
graphics.SmoothingMode = SmoothingMode.AntiAlias;
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
graphics.CompositingQuality = CompositingQuality.HighQuality;
if (position != null)
{
// Draw the image in position catering for overflow.
graphics.DrawImage(overlay, new Point(Math.Min(position.Value.X, width - overlayWidth), Math.Min(position.Value.Y, height - overlayHeight)));
}
else
{
RectangleF centered = ImageMaths.CenteredRectangle(parent, child);
graphics.DrawImage(overlay, new PointF(centered.X, centered.Y));
}
}
}
catch (Exception ex)
{
throw new ImageProcessingException("Error processing image with " + this.GetType().Name, ex);
}
return image;
}
/// <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)
{
Bitmap newImage = null;
Image image = factory.Image;
try
{
ResizeLayer resizeLayer = this.DynamicParameter;
// Augment the layer with the extra information.
resizeLayer.RestrictedSizes = this.RestrictedSizes;
Size maxSize = new Size();
int maxWidth;
int maxHeight;
int.TryParse(this.Settings["MaxWidth"], NumberStyles.Any, CultureInfo.InvariantCulture, out maxWidth);
int.TryParse(this.Settings["MaxHeight"], NumberStyles.Any, CultureInfo.InvariantCulture, out maxHeight);
maxSize.Width = maxWidth;
maxSize.Height = maxHeight;
resizeLayer.MaxSize = maxSize;
Resizer resizer = new Resizer(resizeLayer) { ImageFormat = factory.CurrentImageFormat, AnimationProcessMode = factory.AnimationProcessMode };
newImage = resizer.ResizeImage(image, factory.FixGamma);
// Check that the original image has not been returned.
if (newImage != image)
{
// Reassign the image.
image.Dispose();
image = newImage;
if (factory.PreserveExifData && factory.ExifPropertyItems.Any())
{
// Set the width EXIF data.
factory.SetPropertyItem(ExifPropertyTag.ImageWidth, (ushort)image.Width);
// Set the height EXIF data.
factory.SetPropertyItem(ExifPropertyTag.ImageHeight, (ushort)image.Height);
}
}
}
catch (Exception ex)
{
newImage?.Dispose();
throw new ImageProcessingException("Error processing image with " + this.GetType().Name, ex);
}
return image;
}
/// <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)
{
Bitmap newImage = null;
Image image = factory.Image;
try
{
ResizeLayer resizeLayer = this.DynamicParameter;
// Augment the layer with the extra information.
resizeLayer.RestrictedSizes = this.RestrictedSizes;
Size maxSize = new Size();
int maxWidth;
int maxHeight;
int.TryParse(this.Settings["MaxWidth"], NumberStyles.Any, CultureInfo.InvariantCulture, out maxWidth);
int.TryParse(this.Settings["MaxHeight"], NumberStyles.Any, CultureInfo.InvariantCulture, out maxHeight);
maxSize.Width = maxWidth;
maxSize.Height = maxHeight;
resizeLayer.MaxSize = maxSize;
Resizer resizer = new Resizer(resizeLayer);
newImage = resizer.ResizeImage(image);
// Check that the original image has not been returned.
if (newImage != image)
{
// 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);
}
return image;
}
