Merge pull request #9064 from barronpm/move-jellyfin-drawing-skia

1 files changed, 47 insertions, 0 deletions

diff --git a/src/Jellyfin.Drawing.Skia/SkiaHelper.cs b/src/Jellyfin.Drawing.Skia/SkiaHelper.cs
new file mode 100644
index 000000000..23e92dcb2
--- /dev/null
+++ b/src/Jellyfin.Drawing.Skia/SkiaHelper.cs
@@ -0,0 +1,47 @@
+using System.Collections.Generic;
+using SkiaSharp;
+
+namespace Jellyfin.Drawing.Skia
+{
+    /// <summary>
+    /// Class containing helper methods for working with SkiaSharp.
+    /// </summary>
+    public static class SkiaHelper
+    {
+        /// <summary>
+        /// Gets the next valid image as a bitmap.
+        /// </summary>
+        /// <param name="skiaEncoder">The current skia encoder.</param>
+        /// <param name="paths">The list of image paths.</param>
+        /// <param name="currentIndex">The current checked index.</param>
+        /// <param name="newIndex">The new index.</param>
+        /// <returns>A valid bitmap, or null if no bitmap exists after <c>currentIndex</c>.</returns>
+        public static SKBitmap? GetNextValidImage(SkiaEncoder skiaEncoder, IReadOnlyList<string> paths, int currentIndex, out int newIndex)
+        {
+            var imagesTested = new Dictionary<int, int>();
+            SKBitmap? bitmap = null;
+
+            while (imagesTested.Count < paths.Count)
+            {
+                if (currentIndex >= paths.Count)
+                {
+                    currentIndex = 0;
+                }
+
+                bitmap = skiaEncoder.Decode(paths[currentIndex], false, null, out _);
+
+                imagesTested[currentIndex] = 0;
+
+                currentIndex++;
+
+                if (bitmap is not null)
+                {
+                    break;
+                }
+            }
+
+            newIndex = currentIndex;
+            return bitmap;
+        }
+    }
+}