[PATCH v2 1/7] win32u: Flush window surface when it is fully unlocked.

[Rémi Bernon]

From: Rémi Bernon

---
 dlls/win32u/dibdrv/dc.c | 34 ++++++++++++++++++++++------------
 1 file changed, 22 insertions(+), 12 deletions(-)

diff --git a/dlls/win32u/dibdrv/dc.c b/dlls/win32u/dibdrv/dc.c
index 38039e7d6ae..e1b2f66cb25 100644
--- a/dlls/win32u/dibdrv/dc.c
+++ b/dlls/win32u/dibdrv/dc.c
@@ -734,6 +734,7 @@ struct windrv_physdev
     struct gdi_physdev     dev;
     struct dibdrv_physdev *dibdrv;
     struct window_surface *surface;
+    UINT lock_count;
 };

static const struct gdi_dc_funcs window_driver;
@@ -743,25 +744,34 @@ static inline struct windrv_physdev *get_windrv_physdev( PHYSDEV dev )
     return (struct windrv_physdev *)dev;
 }

+/* gdi_lock should not be locked */
 static inline void lock_surface( struct windrv_physdev *dev )
 {
-    /* gdi_lock should not be locked */
-    dev->surface->funcs->lock( dev->surface );
-    if (IsRectEmpty( dev->dibdrv->bounds ) || dev->surface->draw_start_ticks == 0)
-        dev->surface->draw_start_ticks = NtGetTickCount();
+    struct window_surface *surface = dev->surface;
+
+    surface->funcs->lock( surface );
+    if (!dev->lock_count++)
+    {
+        if (IsRectEmpty( dev->dibdrv->bounds ) || !surface->draw_start_ticks)
+            surface->draw_start_ticks = NtGetTickCount();
+    }
 }

static inline void unlock_surface( struct windrv_physdev *dev )
 {
-    BOOL should_flush = NtGetTickCount() - dev->surface->draw_start_ticks > FLUSH_PERIOD;
-    dev->surface->funcs->unlock( dev->surface );
-    if (should_flush) dev->surface->funcs->flush( dev->surface );
+    struct window_surface *surface = dev->surface;
+
+    surface->funcs->unlock( surface );
+    if (!--dev->lock_count)
+    {
+        DWORD ticks = NtGetTickCount() - surface->draw_start_ticks;
+        if (ticks > FLUSH_PERIOD) surface->funcs->flush( dev->surface );
+    }
 }

-static void unlock_bits_surface( struct gdi_image_bits *bits )
+static void unlock_windrv_bits( struct gdi_image_bits *bits )
 {
-    struct window_surface *surface = bits->param;
-    surface->funcs->unlock( surface );
+    unlock_surface( bits->param );
 }

void dibdrv_set_window_surface( DC *dc, struct window_surface *surface )
@@ -964,8 +974,8 @@ static DWORD windrv_GetImage( PHYSDEV dev, BITMAPINFO *info,
     {
         /* use the freeing callback to unlock the surface */
         assert( !bits->free );
-        bits->free = unlock_bits_surface;
-        bits->param = physdev->surface;
+        bits->free = unlock_windrv_bits;
+        bits->param = physdev;
     }
     else unlock_surface( physdev );
     return ret;