feat: hash screenshot

Command.cs

@@ -1,5 +1,6 @@
 using System.Drawing;
 using System.Drawing.Imaging;
+using Blake3;
 using Dalamud.Game.Command;
 using Newtonsoft.Json;
 using WebP.Net;
@@ -38,28 +39,41 @@ internal class Command : IDisposable {
         }
 
         var saveAs = this.Plugin.Config.SaveFormat;
+        byte[] imageData;
+        string ext;
         if (saveAs.ToImageFormat() is { } format) {
-            this.SaveNative(format, bitmap);
+            var data = this.SaveNative(format, bitmap);
+            if (data == null) {
+                return;
+            }
+
+            (imageData, ext) = data.Value;
         } else if (saveAs is Format.WebpLossless or Format.WebpLossy) {
             using var webp = new WebPObject(bitmap);
-            var bytes = saveAs == Format.WebpLossless
+            imageData = saveAs == Format.WebpLossless
                 ? webp.GetWebPLossless()
                 : webp.GetWebPLossy(this.Plugin.Config.SaveFormatData);
-            using var stream = this.OpenFile("webp");
-            stream.Write(bytes);
+            ext = "webp";
+        } else {
+            return;
         }
 
+        using var stream = this.OpenFile(ext);
+        stream.Write(imageData);
+
         var meta = ScreenshotMetadata.Capture(this.Plugin);
+        var hash = new Blake3HashAlgorithm().ComputeHash(imageData);
+        meta.Blake3Hash = Convert.ToHexString(hash);
         var json = JsonConvert.SerializeObject(meta, Formatting.Indented);
         Plugin.Log.Info(json);
 
         this.Plugin.ChatGui.Print("Screenshot saved.");
     }
 
-    private void SaveNative(ImageFormat format, Image bitmap) {
+    private (byte[], string)? SaveNative(ImageFormat format, Image bitmap) {
         var encoder = GetEncoder(format);
         if (encoder == null) {
-            return;
+            return null;
         }
 
         // ReSharper disable once SwitchExpressionHandlesSomeKnownEnumValuesWithExceptionInDefault
@@ -75,8 +89,9 @@ internal class Command : IDisposable {
             ],
         };
 
-        using var stream = this.OpenFile(ext);
+        using var stream = new MemoryStream();
         bitmap.Save(stream, encoder, parameters);
+        return (stream.ToArray(), ext);
     }
 
     private FileStream OpenFile(string ext) {

Screenie.csproj

@@ -56,6 +56,7 @@
     </ItemGroup>
 
     <ItemGroup>
+        <PackageReference Include="Blake3" Version="1.0.0" />
         <PackageReference Include="DalamudPackager" Version="2.1.12"/>
         <PackageReference Include="Microsoft.Windows.CsWin32" Version="0.3.49-beta">
             <PrivateAssets>all</PrivateAssets>

packages.lock.json

@@ -2,6 +2,12 @@
   "version": 1,
   "dependencies": {
     "net7.0-windows7.0": {
+      "Blake3": {
+        "type": "Direct",
+        "requested": "[1.0.0, )",
+        "resolved": "1.0.0",
+        "contentHash": "PR0aJRXkBGk8dPhpAdrscHzTpbNiFQ/oQLAG5vEuwTE4Vu2u4D6UZwwr7tqlDyjCpbE76pWwjZz5BmpoNNZZ/A=="
+      },
       "DalamudPackager": {
         "type": "Direct",
         "requested": "[2.1.12, )",