Nikolay Sivov : d2d1: Check for NULL pointer when releasing previous render target view.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 621675e8f889c0003e9802ad2000d3332bfe132d
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=621675e8f889c0003e9802ad2000d3332bfe132d

Author: Nikolay Sivov <nsivov at codeweavers.com>
Date:   Wed Jan 25 00:47:38 2017 +0300

d2d1: Check for NULL pointer when releasing previous render target view.

Signed-off-by: Nikolay Sivov <nsivov at codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/d2d1/render_target.c | 3 ++-
 dlls/d2d1/tests/d2d1.c    | 6 ++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/dlls/d2d1/render_target.c b/dlls/d2d1/render_target.c
index 0a70897..187e1e0 100644
--- a/dlls/d2d1/render_target.c
+++ b/dlls/d2d1/render_target.c
@@ -2375,7 +2375,8 @@ HRESULT d2d_d3d_render_target_create_rtv(ID2D1RenderTarget *iface, IDXGISurface1
 
     render_target->pixel_size.width = surface_desc.Width;
     render_target->pixel_size.height = surface_desc.Height;
-    ID3D10RenderTargetView_Release(render_target->view);
+    if (render_target->view)
+        ID3D10RenderTargetView_Release(render_target->view);
     render_target->view = view;
 
     return S_OK;
diff --git a/dlls/d2d1/tests/d2d1.c b/dlls/d2d1/tests/d2d1.c
index cde8579..5df5b6e 100644
--- a/dlls/d2d1/tests/d2d1.c
+++ b/dlls/d2d1/tests/d2d1.c
@@ -3129,6 +3129,7 @@ static void test_hwnd_target(void)
     ID2D1HwndRenderTarget *rt;
     ID2D1Factory *factory;
     ID3D10Device1 *device;
+    D2D1_SIZE_U size;
     HRESULT hr;
 
     if (!(device = create_device()))
@@ -3166,6 +3167,11 @@ static void test_hwnd_target(void)
     hr = ID2D1Factory_CreateHwndRenderTarget(factory, &desc, &hwnd_rt_desc, &rt);
     ok(SUCCEEDED(hr), "Failed to create render target, hr %#x.\n", hr);
 
+    size.width = 128;
+    size.height = 64;
+    hr = ID2D1HwndRenderTarget_Resize(rt, &size);
+    ok(SUCCEEDED(hr), "Failed to resize render target, hr %#x.\n", hr);
+
     ID2D1HwndRenderTarget_Release(rt);
 
     DestroyWindow(hwnd_rt_desc.hwnd);