[PATCH v2 1/2] explorer: Introduce a new WINE_VIDEO_DRIVER variable.

[Aida Jonikienė]

From: Aida Jonikienė

This variable is the Wine's equivalent of the SDL_VIDEODRIVER/
SDL_VIDEO_DRIVER variable in SDL 2 and 3 (it explicitly selects
a list of graphics/video drivers to be used).
---
 programs/explorer/desktop.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/programs/explorer/desktop.c b/programs/explorer/desktop.c
index fb59258ad36..c573417fc9c 100644
--- a/programs/explorer/desktop.c
+++ b/programs/explorer/desktop.c
@@ -963,7 +963,7 @@ static void load_graphics_driver( const WCHAR *driver, GUID *guid )
 {
     static const WCHAR device_keyW[] = L"System\CurrentControlSet\Control\Video\{%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}\0000";

-    WCHAR buffer[MAX_PATH], libname[32], *name, *next;
+    WCHAR buffer[MAX_PATH], *env_name, libname[32], *name, *next;
     WCHAR key[ARRAY_SIZE( device_keyW ) + 39];
     BOOL null_driver = FALSE;
     HMODULE module = 0;
@@ -975,7 +975,9 @@ static void load_graphics_driver( const WCHAR *driver, GUID *guid )
         lstrcpyW( buffer, default_driver );

/* @@ Wine registry key: HKCU\Software\Wine\Drivers */
-        if (!RegOpenKeyW( HKEY_CURRENT_USER, L"Software\Wine\Drivers", &hkey ))
+        if ((env_name = _wgetenv( L"WINE_VIDEO_DRIVER" )) && env_name[0] != '\0')
+            lstrcpynW( buffer, env_name, ARRAY_SIZE( buffer ));
+        else if (!RegOpenKeyW( HKEY_CURRENT_USER, L"Software\Wine\Drivers", &hkey ))
         {
             DWORD count = sizeof(buffer);
             RegQueryValueExW( hkey, L"Graphics", 0, NULL, (LPBYTE)buffer, &count );