Alexandre Julliard : gdi32: Add a helper function to find a specific driver in the DC stack.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 0f5cc668bada79e38e8751bcf796f5b348ed3805
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=0f5cc668bada79e38e8751bcf796f5b348ed3805

Author: Alexandre Julliard <julliard at winehq.org>
Date:   Tue Aug 21 12:54:01 2012 +0200

gdi32: Add a helper function to find a specific driver in the DC stack.

---

 dlls/gdi32/gdi_private.h |    8 ++++++++
 dlls/gdi32/path.c        |    9 +++++----
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/dlls/gdi32/gdi_private.h b/dlls/gdi32/gdi_private.h
index 44d5798..78ff1a7 100644
--- a/dlls/gdi32/gdi_private.h
+++ b/dlls/gdi32/gdi_private.h
@@ -179,6 +179,14 @@ static inline PHYSDEV pop_dc_driver( DC *dc, PHYSDEV dev )
     return dev;
 }
 
+static inline PHYSDEV find_dc_driver( DC *dc, const struct gdi_dc_funcs *funcs )
+{
+    PHYSDEV dev;
+
+    for (dev = dc->physDev; dev; dev = dev->next) if (dev->funcs == funcs) return dev;
+    return NULL;
+}
+
 /* bitmap object */
 
 typedef struct tagBITMAPOBJ
diff --git a/dlls/gdi32/path.c b/dlls/gdi32/path.c
index 0a591af..a58f4e6 100644
--- a/dlls/gdi32/path.c
+++ b/dlls/gdi32/path.c
@@ -856,14 +856,15 @@ static BOOL pathdrv_DeleteDC( PHYSDEV dev )
 
 BOOL PATH_SavePath( DC *dst, DC *src )
 {
-    struct path_physdev *physdev;
+    PHYSDEV dev;
 
     if (src->path)
     {
         if (!(dst->path = copy_gdi_path( src->path ))) return FALSE;
     }
-    else if ((physdev = find_path_physdev( src )))
+    else if ((dev = find_dc_driver( src, &path_driver )))
     {
+        struct path_physdev *physdev = get_path_physdev( dev );
         if (!(dst->path = copy_gdi_path( physdev->path ))) return FALSE;
         dst->path_open = TRUE;
     }
@@ -880,7 +881,7 @@ BOOL PATH_RestorePath( DC *dst, DC *src )
         if (!physdev)
         {
             if (!path_driver.pCreateDC( &dst->physDev, NULL, NULL, NULL, NULL )) return FALSE;
-            physdev = get_path_physdev( dst->physDev );
+            physdev = get_path_physdev( find_dc_driver( dst, &path_driver ));
         }
         else free_gdi_path( physdev->path );
 
@@ -2101,7 +2102,7 @@ BOOL nulldrv_BeginPath( PHYSDEV dev )
         free_gdi_path( path );
         return FALSE;
     }
-    physdev = get_path_physdev( dc->physDev );
+    physdev = get_path_physdev( find_dc_driver( dc, &path_driver ));
     physdev->path = path;
     if (dc->path) free_gdi_path( dc->path );
     dc->path = NULL;