public ImageRetrieveResult RetrieveImage(LayersCmsImage image)
{
if (image == null || image.Filename == null) throw new ArgumentNullException("image");
try
{
// Get the full file path
String imageFilePath = Path.Combine(_folderPath, image.Filename);
// Load the contents of the file at the given path into an Image instance
Image img = Image.FromFile(imageFilePath);
// Return the successful output
return new ImageRetrieveResult()
{
ErrorMessage = null,
Exception = null,
Image = img,
Successful = true
};
}
catch (Exception e)
{
// Report the error
return new ImageRetrieveResult()
{
ErrorMessage = "Unable to retrieve image file from the file system",
Exception = e,
Image = null,
Successful = false
};
}
}
public ImageSaveResult SaveImage(Image graphic, LayersCmsImage imageData, bool disposeOnComplete)
{
if (graphic == null) throw new ArgumentNullException("graphic");
if (imageData == null) throw new ArgumentNullException("imageData");
ImageSaveResult output = SaveImage(graphic, imageData);
// Dispose of the image (if requested)
if (disposeOnComplete)
graphic.Dispose();
return output;
}
public override Image GetImage(LayersCmsImage imageData, ImageResizeDetails resizeDetails)
{
if (imageData == null) throw new ArgumentNullException("imageData");
if (resizeDetails == null) throw new ArgumentNullException("resizeDetails");
var settings = new ResizeSettings() {Format = ImageFileExtension};
// If a height AND a width have been specified, resize to the exact width/height combo
if (resizeDetails.Height != null && resizeDetails.Width != null)
{
settings.Height = resizeDetails.Height.Value;
settings.Width = resizeDetails.Width.Value;
settings.Mode = FitMode.Crop;
// If the image is small, use 100% quality, else 90%
settings.Quality = (resizeDetails.Height.Value <= SmallImageThreshold && resizeDetails.Width.Value <= SmallImageThreshold
? SmallImageQualityPercent
: StandardImageQualityPercent);
}
else if (resizeDetails.Height != null)
{
// Only a height has been specified. Proportionally resize the image scaled to the height value
settings.Height = resizeDetails.Height.Value;
}
else if (resizeDetails.Width != null)
{
// Only a width has been specified. Proportionally resize the image scaled to the width value
settings.Width = resizeDetails.Width.Value;
}
using (ImageRetrieveResult retrievedImage = ImageStore.RetrieveImage(imageData))
{
if (retrievedImage.Successful && retrievedImage.Image != null)
{
// Instantiate a new stream to store the resized image into
using (Stream imageStream = new MemoryStream())
{
// Let ImageResizer handle the resizing
ImageBuilder.Current.Build(retrievedImage.Image, imageStream, settings, true);
// Return an Image constructed from the stream
return Image.FromStream(imageStream);
}
}
// If the image data is invalid (no image found), return null
return null;
}
}
private ImageSaveResult SaveImage(Image graphic, LayersCmsImage imageData)
{
if (graphic == null) throw new ArgumentNullException("graphic");
if (imageData == null || imageData.Filename == null) throw new ArgumentNullException("imageData");
try
{
// Generate a unique filename given the data in the imageData param
String newFilename = _fileHelper.GenerateUniqueFilename(imageData.Filename, _folderPath, true);
// Save the image file to the file system
graphic.Save(newFilename);
// Update the LayersCmsImage so it the filename property matches the filename of the saved file
imageData.Filename = newFilename;
// Return the successful result
return new ImageSaveResult()
{
CmsImage = imageData,
ErrorMessage = null,
Exception = null,
Successful = true
};
}
catch (Exception e)
{
// Report the error
return new ImageSaveResult()
{
Exception = e,
CmsImage = null,
ErrorMessage = "Unable to save image file",
Successful = false
};
}
}
public abstract Image GetImage(LayersCmsImage imageData, ImageResizeDetails resizeDetails);
