ExifResolutionValues struct

src/ImageSharp/Common/Helpers/UnitConverter.cs

@@ -98,13 +98,14 @@ namespace SixLabors.ImageSharp.Common.Helpers
         }
 
         /// <summary>
-        /// Sets the exif profile resolution values.
+        /// Gets the exif profile resolution values.
         /// </summary>
         /// <param name="unit">The resolution unit.</param>
         /// <param name="horizontal">The horizontal resolution value.</param>
         /// <param name="vertical">The vertical resolution value.</param>
+        /// <returns><see cref="ExifResolutionValues"/></returns>
         [MethodImpl(InliningOptions.ShortMethod)]
-        public static (ushort, double?, double?) AdjustToExif(PixelResolutionUnit unit, double horizontal, double vertical)
+        public static ExifResolutionValues GetExifResolutionValues(PixelResolutionUnit unit, double horizontal, double vertical)
         {
             switch (unit)
             {
@@ -128,10 +129,10 @@ namespace SixLabors.ImageSharp.Common.Helpers
             ushort exifUnit = (ushort)(unit + 1);
             if (unit == PixelResolutionUnit.AspectRatio)
             {
-                return (exifUnit, null, null);
+                return new ExifResolutionValues(exifUnit, null, null);
             }
 
-            return (exifUnit, horizontal, vertical);
+            return new ExifResolutionValues(exifUnit, horizontal, vertical);
         }
     }
 }

src/ImageSharp/Formats/Tiff/TiffEncoderEntriesCollector.cs

@@ -239,26 +239,26 @@ namespace SixLabors.ImageSharp.Formats.Tiff
 
             private void ProcessResolution(ImageMetadata imageMetadata)
             {
-                (ushort, double?, double?) exifValues = UnitConverter.AdjustToExif(
+                ExifResolutionValues resolution = UnitConverter.GetExifResolutionValues(
                     imageMetadata.ResolutionUnits,
                     imageMetadata.HorizontalResolution,
                     imageMetadata.VerticalResolution);
 
                 this.Collector.AddOrReplace(new ExifShort(ExifTagValue.ResolutionUnit)
                 {
-                    Value = exifValues.Item1
+                    Value = resolution.ResolutionUnit
                 });
 
-                if (exifValues.Item2 != null && exifValues.Item3 != null)
+                if (resolution.VerticalResolution.HasValue && resolution.HorizontalResolution.HasValue)
                 {
                     this.Collector.AddOrReplace(new ExifRational(ExifTagValue.XResolution)
                     {
-                        Value = new Rational(exifValues.Item2.Value)
+                        Value = new Rational(resolution.HorizontalResolution.Value)
                     });
 
                     this.Collector.AddOrReplace(new ExifRational(ExifTagValue.YResolution)
                     {
-                        Value = new Rational(exifValues.Item3.Value)
+                        Value = new Rational(resolution.VerticalResolution.Value)
                     });
                 }
             }