Fix T62651: Win32 Multiple Adapters Warning

Show a more instructive error message for users who have plugged
multiple monitors into multiple display adapters. And do not exit
if unable to open a child window when in this state.

See D13885 for more details

Differential Revision: https://developer.blender.org/D13885

Reviewed by Ray Molenkamp

1 files changed, 20 insertions, 11 deletions

diff --git a/intern/ghost/intern/GHOST_WindowWin32.cpp b/intern/ghost/intern/GHOST_WindowWin32.cpp
index 7993772a94b..47d4ff77d17 100644
--- a/intern/ghost/intern/GHOST_WindowWin32.cpp
+++ b/intern/ghost/intern/GHOST_WindowWin32.cpp
@@ -132,8 +132,24 @@ GHOST_WindowWin32::GHOST_WindowWin32(GHOST_SystemWin32 *system,
   m_hDC = ::GetDC(m_hWnd);
 
   if (!setDrawingContextType(type)) {
+    const char *title = "Blender - Unsupported Graphics Card Configuration";
+    const char *text =
+        "A graphics card and driver with support for OpenGL 3.3 or higher is "
+        "required.\n\nInstalling the latest driver for your graphics card might resolve the "
+        "issue.";
+    if (GetSystemMetrics(SM_CMONITORS) > 1) {
+      text =
+          "A graphics card and driver with support for OpenGL 3.3 or higher is "
+          "required.\n\nPlugging all monitors into your primary graphics card might resolve "
+          "this issue. Installing the latest driver for your graphics card could also help.";
+    }
+    MessageBox(m_hWnd, text, title, MB_OK | MB_ICONERROR);
+    ::ReleaseDC(m_hWnd, m_hDC);
     ::DestroyWindow(m_hWnd);
     m_hWnd = NULL;
+    if (!parentwindow) {
+      exit(0);
+    }
     return;
   }
 
@@ -567,20 +583,13 @@ GHOST_Context *GHOST_WindowWin32::newDrawingContext(GHOST_TDrawingContextType ty
                                    (m_debug_context ? WGL_CONTEXT_DEBUG_BIT_ARB : 0),
                                    GHOST_OPENGL_WGL_RESET_NOTIFICATION_STRATEGY);
 
-    if (context->initializeDrawingContext()) {
-      return context;
-    }
-    else {
-      MessageBox(m_hWnd,
-                 "A graphics card and driver with support for OpenGL 3.3 or higher is required.\n"
-                 "Installing the latest driver for your graphics card may resolve the issue.\n\n"
-                 "The program will now close.",
-                 "Blender - Unsupported Graphics Card or Driver",
-                 MB_OK | MB_ICONERROR);
+    if (context && !context->initializeDrawingContext()) {
       delete context;
-      exit(0);
+      context = nullptr;
     }
 
+    return context;
+
 #elif defined(WITH_GL_PROFILE_COMPAT)
     // ask for 2.1 context, driver gives any GL version >= 2.1
     // (hopefully the latest compatibility profile)