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jellyfin/MediaBrowser.Controller/Drawing/ImageHelper.cs

73 lines
2.4 KiB

using System;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Model.Drawing;
using MediaBrowser.Model.Entities;
namespace MediaBrowser.Controller.Drawing
{
public static class ImageHelper
{
public static ImageSize GetNewImageSize(ImageProcessingOptions options, ImageSize? originalImageSize)
{
if (originalImageSize.HasValue)
{
// Determine the output size based on incoming parameters
var newSize = DrawingUtils.Resize(originalImageSize.Value, options.Width, options.Height, options.MaxWidth, options.MaxHeight);
return newSize;
}
return GetSizeEstimate(options);
}
public static IImageProcessor ImageProcessor { get; set; }
private static ImageSize GetSizeEstimate(ImageProcessingOptions options)
{
if (options.Width.HasValue && options.Height.HasValue)
{
return new ImageSize(options.Width.Value, options.Height.Value);
}
var aspect = GetEstimatedAspectRatio(options.Image.Type, options.Item);
var width = options.Width ?? options.MaxWidth;
if (width.HasValue)
{
var heightValue = width.Value / aspect;
return new ImageSize(width.Value, heightValue);
}
var height = options.Height ?? options.MaxHeight ?? 200;
var widthValue = aspect * height;
return new ImageSize(widthValue, height);
}
private static double GetEstimatedAspectRatio(ImageType type, IHasMetadata item)
{
switch (type)
{
case ImageType.Art:
case ImageType.Backdrop:
case ImageType.Chapter:
case ImageType.Screenshot:
case ImageType.Thumb:
return 1.78;
case ImageType.Banner:
return 5.4;
case ImageType.Box:
case ImageType.BoxRear:
case ImageType.Disc:
case ImageType.Menu:
return 1;
case ImageType.Logo:
return 2.58;
case ImageType.Primary:
return item.GetDefaultPrimaryImageAspectRatio() ?? .667;
default:
return 1;
}
}
}
}