From d10a5081789895add4de387d4454de5ce2b2d532 Mon Sep 17 00:00:00 2001
From: Crsky <crskycode@hotmail.com>
Date: Tue, 8 Apr 2025 16:05:50 +0800
Subject: [PATCH] (Bishop): Fix BSG grayscale format support

---
 ArcFormats/Bishop/ImageBSG.cs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/ArcFormats/Bishop/ImageBSG.cs b/ArcFormats/Bishop/ImageBSG.cs
index 6b4f5081..cd2f56a5 100644
--- a/ArcFormats/Bishop/ImageBSG.cs
+++ b/ArcFormats/Bishop/ImageBSG.cs
@@ -40,6 +40,7 @@ namespace GameRes.Formats.Bishop
         public int  DataOffset;
         public int  DataSize;
         public int  PaletteOffset;
+        public bool HasPalette;
     }
 
     [Export(typeof(ImageFormat))]
@@ -73,6 +74,7 @@ namespace GameRes.Formats.Bishop
                 DataOffset  = header.ToInt32 (base_offset+0x32)+base_offset,
                 DataSize    = header.ToInt32 (base_offset+0x36),
                 PaletteOffset = header.ToInt32 (base_offset+0x3A)+base_offset,
+                HasPalette  = header.ToInt32 (base_offset+0x3A) != 0
             };
         }
 
@@ -122,9 +124,9 @@ namespace GameRes.Formats.Bishop
                 Stride = (int)m_info.Width * 4;
                 break;
             case 2:
-                Format = PixelFormats.Indexed8;
+                Format = m_info.HasPalette ? PixelFormats.Indexed8 : PixelFormats.Gray8;
                 Stride = (int)m_info.Width;
-                Palette = ReadPalette();
+                Palette = m_info.HasPalette ? ReadPalette() : null;
                 break;
             }
         }