[PATCH 2/5] server: For a CS_PARENTDC child use parent for visible region calculations.

[Dmitry Timoshkov]

From: Dmitry Timoshkov

Signed-off-by: Dmitry Timoshkov 
---
 server/window.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/server/window.c b/server/window.c
index fc16acc1822..cc48b8343ee 100644
--- a/server/window.c
+++ b/server/window.c
@@ -1313,7 +1313,19 @@ static struct region *crop_region_to_win_rect( struct window *win, struct region
     rectangle_t rect;
     struct region *tmp;

-    if (!get_window_visible_rect( win, &rect, frame )) return NULL;
+    if (win->parent && is_window_using_parent_dc( win ))
+    {
+        int offset_x, offset_y;
+
+        if (!get_window_visible_rect( win->parent, &rect, 0 )) return NULL;
+
+        offset_x = rect.left + (frame ? win->window_rect.left : win->client_rect.left);
+        offset_y = rect.top + (frame ? win->window_rect.top : win->client_rect.top);
+        offset_rect( &rect, -offset_x, -offset_y );
+    }
+    else
+        if (!get_window_visible_rect( win, &rect, frame )) return NULL;
+
     if (!(tmp = create_empty_region())) return NULL;
     set_region_rect( tmp, &rect );