/// <summary>
/// Gets the ImageProcessor Url from the image path.
/// </summary>
/// <param name="imageUrl">
/// The image url.
/// </param>
/// <param name="imageUrlGenerator">
/// The generator that will process all the options and the image URL to return a full image urls with all processing options appended
/// </param>
/// <param name="cropDataSet"></param>
/// <param name="width">
/// The width of the output image.
/// </param>
/// <param name="height">
/// The height of the output image.
/// </param>
/// <param name="cropAlias">
/// The crop alias.
/// </param>
/// <param name="quality">
/// Quality percentage of the output image.
/// </param>
/// <param name="imageCropMode">
/// The image crop mode.
/// </param>
/// <param name="imageCropAnchor">
/// The image crop anchor.
/// </param>
/// <param name="preferFocalPoint">
/// Use focal point to generate an output image using the focal point instead of the predefined crop if there is one
/// </param>
/// <param name="useCropDimensions">
/// Use crop dimensions to have the output image sized according to the predefined crop sizes, this will override the width and height parameters
/// </param>
/// <param name="cacheBusterValue">
/// Add a serialized date of the last edit of the item to ensure client cache refresh when updated
/// </param>
/// <param name="furtherOptions">
/// These are any query string parameters (formatted as query strings) that ImageProcessor supports. For example:
/// <example>
/// <![CDATA[
/// furtherOptions: "&bgcolor=fff"
/// ]]>
/// </example>
/// </param>
/// <param name="ratioMode">
/// Use a dimension as a ratio
/// </param>
/// <param name="upScale">
/// If the image should be upscaled to requested dimensions
/// </param>
/// <returns>
/// The <see cref="string"/>.
/// </returns>
public static string GetCropUrl(
this string imageUrl,
IImageUrlGenerator imageUrlGenerator,
ImageCropperValue cropDataSet,
int?width = null,
int?height = null,
string cropAlias = null,
int?quality = null,
ImageCropMode?imageCropMode = null,
ImageCropAnchor?imageCropAnchor = null,
bool preferFocalPoint = false,
bool useCropDimensions = false,
string cacheBusterValue = null,
string furtherOptions = null,
ImageCropRatioMode?ratioMode = null,
bool upScale = true,
string animationProcessMode = null)
{
if (string.IsNullOrEmpty(imageUrl))
{
return(string.Empty);
}
ImageUrlGenerationOptions options;
if (cropDataSet != null && (imageCropMode == ImageCropMode.Crop || imageCropMode == null))
{
var crop = cropDataSet.GetCrop(cropAlias);
// if a crop was specified, but not found, return null
if (crop == null && !string.IsNullOrWhiteSpace(cropAlias))
{
return(null);
}
options = cropDataSet.GetCropBaseOptions(imageUrl, crop, string.IsNullOrWhiteSpace(cropAlias), preferFocalPoint);
if (crop != null & useCropDimensions)
{
width = crop.Width;
height = crop.Height;
}
// If a predefined crop has been specified & there are no coordinates & no ratio mode, but a width parameter has been passed we can get the crop ratio for the height
if (crop != null && string.IsNullOrEmpty(cropAlias) == false && crop.Coordinates == null && ratioMode == null && width != null && height == null)
{
options.HeightRatio = (decimal)crop.Height / crop.Width;
}
// If a predefined crop has been specified & there are no coordinates & no ratio mode, but a height parameter has been passed we can get the crop ratio for the width
if (crop != null && string.IsNullOrEmpty(cropAlias) == false && crop.Coordinates == null && ratioMode == null && width == null && height != null)
{
options.WidthRatio = (decimal)crop.Width / crop.Height;
}
}
else
{
options = new ImageUrlGenerationOptions(imageUrl)
{
ImageCropMode = (imageCropMode ?? ImageCropMode.Pad).ToString().ToLowerInvariant(),
ImageCropAnchor = imageCropAnchor?.ToString().ToLowerInvariant()
};
}
options.Quality = quality;
options.Width = ratioMode != null && ratioMode.Value == ImageCropRatioMode.Width ? null : width;
options.Height = ratioMode != null && ratioMode.Value == ImageCropRatioMode.Height ? null : height;
options.AnimationProcessMode = animationProcessMode;
if (ratioMode == ImageCropRatioMode.Width && height != null)
{
// if only height specified then assume a square
if (width == null)
{
width = height;
}
options.WidthRatio = (decimal)width / (decimal)height;
}
if (ratioMode == ImageCropRatioMode.Height && width != null)
{
// if only width specified then assume a square
if (height == null)
{
height = width;
}
options.HeightRatio = (decimal)height / (decimal)width;
}
options.UpScale = upScale;
options.FurtherOptions = furtherOptions;
options.CacheBusterValue = cacheBusterValue;
return(imageUrlGenerator.GetImageUrl(options));
}
/// <summary>
/// Gets the underlying image processing service URL from the image path.
/// </summary>
/// <param name="imageUrl">The image URL.</param>
/// <param name="imageUrlGenerator">The generator that will process all the options and the image URL to return a full image URLs with all processing options appended.</param>
/// <param name="cropDataSet">The crop data set.</param>
/// <param name="width">The width of the output image.</param>
/// <param name="height">The height of the output image.</param>
/// <param name="cropAlias">The crop alias.</param>
/// <param name="quality">Quality percentage of the output image.</param>
/// <param name="imageCropMode">The image crop mode.</param>
/// <param name="imageCropAnchor">The image crop anchor.</param>
/// <param name="preferFocalPoint">Use focal point to generate an output image using the focal point instead of the predefined crop if there is one.</param>
/// <param name="useCropDimensions">Use crop dimensions to have the output image sized according to the predefined crop sizes, this will override the width and height parameters.</param>
/// <param name="cacheBusterValue">Add a serialized date of the last edit of the item to ensure client cache refresh when updated.</param>
/// <param name="furtherOptions">These are any query string parameters (formatted as query strings) that the underlying image processing service supports. For example:
/// <example><![CDATA[
/// furtherOptions: "bgcolor=fff"
/// ]]></example></param>
/// <returns>
/// The URL of the cropped image.
/// </returns>
public static string GetCropUrl(
this string imageUrl,
IImageUrlGenerator imageUrlGenerator,
ImageCropperValue cropDataSet,
int?width = null,
int?height = null,
string cropAlias = null,
int?quality = null,
ImageCropMode?imageCropMode = null,
ImageCropAnchor?imageCropAnchor = null,
bool preferFocalPoint = false,
bool useCropDimensions = false,
string cacheBusterValue = null,
string furtherOptions = null)
{
if (string.IsNullOrWhiteSpace(imageUrl))
{
return(null);
}
ImageUrlGenerationOptions options;
if (cropDataSet != null && (imageCropMode == ImageCropMode.Crop || imageCropMode == null))
{
ImageCropperValue.ImageCropperCrop crop = cropDataSet.GetCrop(cropAlias);
// If a crop was specified, but not found, return null
if (crop == null && !string.IsNullOrWhiteSpace(cropAlias))
{
return(null);
}
options = cropDataSet.GetCropBaseOptions(imageUrl, crop, preferFocalPoint || string.IsNullOrWhiteSpace(cropAlias));
if (crop != null && useCropDimensions)
{
width = crop.Width;
height = crop.Height;
}
// Calculate missing dimension if a predefined crop has been specified, but has no coordinates
if (crop != null && string.IsNullOrEmpty(cropAlias) == false && crop.Coordinates == null)
{
if (width != null && height == null)
{
height = (int)MathF.Round(width.Value * ((float)crop.Height / crop.Width));
}
else if (width == null && height != null)
{
width = (int)MathF.Round(height.Value * ((float)crop.Width / crop.Height));
}
}
}
else
{
options = new ImageUrlGenerationOptions(imageUrl)
{
ImageCropMode = (imageCropMode ?? ImageCropMode.Pad), // Not sure why we default to Pad
ImageCropAnchor = imageCropAnchor
};
}
options.Quality = quality;
options.Width = width;
options.Height = height;
options.FurtherOptions = furtherOptions;
options.CacheBusterValue = cacheBusterValue;
return(imageUrlGenerator.GetImageUrl(options));
}
