fix image compatibility under Firefox

Asvel · Feb 23, 2025 · a42b6e5 · a42b6e5
1 parent 1ba191a
commit a42b6e5
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/client/StaticData.cs b/client/StaticData.cs
@@ -13,11 +13,17 @@ internal class StaticData
     {
         public static readonly JsonSerializerOptions JsonOptions = new() { Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping };
         public static readonly byte[] BmpHeader = [
-            0x42, 0x4D, 0x46, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x00, 0x00, 0x00, 0x38, 0x00,
+            0x42, 0x4D, 0x7A, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7A, 0x00, 0x00, 0x00, 0x6C, 0x00,
             0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0xD8, 0xFF, 0xFF, 0xFF, 0x01, 0x00, 0x20, 0x00, 0x03, 0x00,
             0x00, 0x00, 0x00, 0x19, 0x00, 0x00, 0x60, 0x09, 0x00, 0x00, 0x60, 0x09, 0x00, 0x00, 0x00, 0x00,
             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00,
             0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,
+            // Firefox 不支持只带 alpha mask 不带后续 color space 内容的 DIB header，加个无效的 bV4CSType=-1 哄哄它
+            // https://hg.mozilla.org/mozilla-central/file/tip/image/decoders/nsBMPDecoder.cpp
+            0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 
         ];
 
         public readonly Dictionary<string, byte[]> Jsons = [];