Ken Thomases : gdi32: Also accept "\\.\DISPLAY<n>" devices names with <n> other than 1 as display devices.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 7c2d5a7c25437bc872c8ddf335466cffc0e995fa
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=7c2d5a7c25437bc872c8ddf335466cffc0e995fa

Author: Ken Thomases <ken at codeweavers.com>
Date:   Tue Jun 25 16:39:11 2019 +0800

gdi32: Also accept "\\.\DISPLAY<n>" devices names with <n> other than 1 as display devices.

Signed-off-by: Zhiyi Zhang <zzhang at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/gdi32/driver.c | 32 ++++++++++++++++++++++++++++----
 1 file changed, 28 insertions(+), 4 deletions(-)

diff --git a/dlls/gdi32/driver.c b/dlls/gdi32/driver.c
index 96c2f1f..dcbc480 100644
--- a/dlls/gdi32/driver.c
+++ b/dlls/gdi32/driver.c
@@ -136,6 +136,32 @@ static const struct gdi_dc_funcs *get_display_driver(void)
 
 
 /**********************************************************************
+ *	     is_display_device
+ */
+static BOOL is_display_device( LPCWSTR name )
+{
+    static const WCHAR display_deviceW[] = {'\\','\\','.','\\','D','I','S','P','L','A','Y'};
+    const WCHAR *p = name;
+
+    if (strncmpiW( name, display_deviceW, sizeof(display_deviceW) / sizeof(WCHAR) ))
+        return FALSE;
+
+    p += sizeof(display_deviceW) / sizeof(WCHAR);
+
+    if (!isdigitW( *p++ ))
+        return FALSE;
+
+    for (; *p; p++)
+    {
+        if (!isdigitW( *p ))
+            return FALSE;
+    }
+
+    return TRUE;
+}
+
+
+/**********************************************************************
  *	     DRIVER_load_driver
  */
 const struct gdi_dc_funcs *DRIVER_load_driver( LPCWSTR name )
@@ -143,10 +169,9 @@ const struct gdi_dc_funcs *DRIVER_load_driver( LPCWSTR name )
     HMODULE module;
     struct graphics_driver *driver, *new_driver;
     static const WCHAR displayW[] = { 'd','i','s','p','l','a','y',0 };
-    static const WCHAR display1W[] = {'\\','\\','.','\\','D','I','S','P','L','A','Y','1',0};
 
     /* display driver is a special case */
-    if (!strcmpiW( name, displayW ) || !strcmpiW( name, display1W )) return get_display_driver();
+    if (!strcmpiW( name, displayW ) || is_display_device( name )) return get_display_driver();
 
     if ((module = GetModuleHandleW( name )))
     {
@@ -883,13 +908,12 @@ BOOL DRIVER_GetDriverName( LPCWSTR device, LPWSTR driver, DWORD size )
 {
     static const WCHAR displayW[] = { 'd','i','s','p','l','a','y',0 };
     static const WCHAR devicesW[] = { 'd','e','v','i','c','e','s',0 };
-    static const WCHAR display1W[] = {'\\','\\','.','\\','D','I','S','P','L','A','Y','1',0};
     static const WCHAR empty_strW[] = { 0 };
     WCHAR *p;
 
     /* display is a special case */
     if (!strcmpiW( device, displayW ) ||
-        !strcmpiW( device, display1W ))
+        is_display_device( device ))
     {
         lstrcpynW( driver, displayW, size );
         return TRUE;