From 79c820e7b17ba35a8289f19fa8f258f4578f9ff1 Mon Sep 17 00:00:00 2001
From: Volker Ruppert <Volker.Ruppert@t-online.de>
Date: Sun, 8 Sep 2024 07:01:26 +0200
Subject: [PATCH] win32 gui: fixed dimension_update() for 15 bpp modes.

---
 bochs/gui/win32.cc | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/bochs/gui/win32.cc b/bochs/gui/win32.cc
index 71dba31eb..0f85d716d 100644
--- a/bochs/gui/win32.cc
+++ b/bochs/gui/win32.cc
@@ -1895,8 +1895,12 @@ void bx_win32_gui_c::dimension_update(unsigned x, unsigned y, unsigned fheight,
     }
   }
 
-  bitmap_info->bmiHeader.biBitCount = bpp;
   if (bpp != current_bpp) {
+    if (bpp == 15) {
+      bitmap_info->bmiHeader.biBitCount = 16;
+    } else {
+      bitmap_info->bmiHeader.biBitCount = bpp;
+    }
     if (bpp == 16) {
       bitmap_info->bmiHeader.biCompression = BI_BITFIELDS;
       static RGBQUAD red_mask   = {0x00, 0xF8, 0x00, 0x00};
@@ -1915,9 +1919,6 @@ void bx_win32_gui_c::dimension_update(unsigned x, unsigned y, unsigned fheight,
         bitmap_info->bmiColors[2] = bitmap_info->bmiColors[258];
       }
       bitmap_info->bmiHeader.biCompression = BI_RGB;
-      if (bpp == 15) {
-        bitmap_info->bmiHeader.biBitCount = 16;
-      }
     }
   }
   current_bpp = guest_bpp = bpp;