[cairo] [PATCH 1/3] Enlarge fallback surface

[LRN]

Enlarges the fallback surface created of the amount
necessary not to write past the end of the DIB. It assumes that
Clip applied to an HDC are clamped to (0,0,width,height) of the HDC.

Fixes bug 53121

Signed-off-by: Massimo Valentini <mvalentini at src.gnome.org>
---
 src/win32/cairo-win32-display-surface.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/win32/cairo-win32-display-surface.c b/src/win32/cairo-win32-display-surface.c
index 5ecdbee..965f2c4 100644
--- a/src/win32/cairo-win32-display-surface.c
+++ b/src/win32/cairo-win32-display-surface.c
@@ -455,17 +455,17 @@ _cairo_win32_display_surface_map_to_image (void                    *abstract_sur
 	surface->fallback =
 	    _cairo_win32_display_surface_create_for_dc (surface->win32.dc,
 							surface->win32.format,
-							surface->win32.extents.width,
-							surface->win32.extents.height);
+							surface->win32.extents.x + surface->win32.extents.width,
+							surface->win32.extents.y + surface->win32.extents.height);
 	if (unlikely (status = surface->fallback->status))
 	    goto err;

 	if (!BitBlt (to_win32_surface(surface->fallback)->dc,
-		     0, 0,
+		     surface->win32.extents.x, surface->win32.extents.y,
 		     surface->win32.extents.width,
 		     surface->win32.extents.height,
 		     surface->win32.dc,
-		     0, 0,
+		     surface->win32.extents.x, surface->win32.extents.y,
 		     SRCCOPY)) {
 	    status = _cairo_error (CAIRO_STATUS_DEVICE_ERROR);
 	    goto err;
-- 
1.7.6.5