Michael Stefaniuc : dxgi: COM cleanup in the IDXGISwapChain iface.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 61f51eb47ecde08f9d1f6e60b1261e52f029a67e
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=61f51eb47ecde08f9d1f6e60b1261e52f029a67e

Author: Michael Stefaniuc <mstefani at redhat.de>
Date:   Mon Jun  6 10:25:49 2011 +0200

dxgi: COM cleanup in the IDXGISwapChain iface.

---

 dlls/dxgi/dxgi_private.h |    2 +-
 dlls/dxgi/swapchain.c    |   15 ++++++++++-----
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/dlls/dxgi/dxgi_private.h b/dlls/dxgi/dxgi_private.h
index 741e3e3..98fdea8 100644
--- a/dlls/dxgi/dxgi_private.h
+++ b/dlls/dxgi/dxgi_private.h
@@ -124,7 +124,7 @@ HRESULT dxgi_adapter_init(struct dxgi_adapter *adapter, IWineDXGIFactory *parent
 /* IDXGISwapChain */
 struct dxgi_swapchain
 {
-    const struct IDXGISwapChainVtbl *vtbl;
+    IDXGISwapChain IDXGISwapChain_iface;
     LONG refcount;
     struct wined3d_swapchain *wined3d_swapchain;
 };
diff --git a/dlls/dxgi/swapchain.c b/dlls/dxgi/swapchain.c
index e4f7433..373403c 100644
--- a/dlls/dxgi/swapchain.c
+++ b/dlls/dxgi/swapchain.c
@@ -24,6 +24,11 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(dxgi);
 
+static inline struct dxgi_swapchain *impl_from_IDXGISwapChain(IDXGISwapChain *iface)
+{
+    return CONTAINING_RECORD(iface, struct dxgi_swapchain, IDXGISwapChain_iface);
+}
+
 /* IUnknown methods */
 
 static HRESULT STDMETHODCALLTYPE dxgi_swapchain_QueryInterface(IDXGISwapChain *iface, REFIID riid, void **object)
@@ -48,7 +53,7 @@ static HRESULT STDMETHODCALLTYPE dxgi_swapchain_QueryInterface(IDXGISwapChain *i
 
 static ULONG STDMETHODCALLTYPE dxgi_swapchain_AddRef(IDXGISwapChain *iface)
 {
-    struct dxgi_swapchain *This = (struct dxgi_swapchain *)iface;
+    struct dxgi_swapchain *This = impl_from_IDXGISwapChain(iface);
     ULONG refcount = InterlockedIncrement(&This->refcount);
 
     TRACE("%p increasing refcount to %u\n", This, refcount);
@@ -61,7 +66,7 @@ static ULONG STDMETHODCALLTYPE dxgi_swapchain_AddRef(IDXGISwapChain *iface)
 
 static ULONG STDMETHODCALLTYPE dxgi_swapchain_Release(IDXGISwapChain *iface)
 {
-    struct dxgi_swapchain *This = (struct dxgi_swapchain *)iface;
+    struct dxgi_swapchain *This = impl_from_IDXGISwapChain(iface);
     ULONG refcount = InterlockedDecrement(&This->refcount);
 
     TRACE("%p decreasing refcount to %u\n", This, refcount);
@@ -130,7 +135,7 @@ static HRESULT STDMETHODCALLTYPE dxgi_swapchain_GetDevice(IDXGISwapChain *iface,
 
 static HRESULT STDMETHODCALLTYPE dxgi_swapchain_Present(IDXGISwapChain *iface, UINT sync_interval, UINT flags)
 {
-    struct dxgi_swapchain *This = (struct dxgi_swapchain *)iface;
+    struct dxgi_swapchain *This = impl_from_IDXGISwapChain(iface);
 
     TRACE("iface %p, sync_interval %u, flags %#x\n", iface, sync_interval, flags);
 
@@ -143,7 +148,7 @@ static HRESULT STDMETHODCALLTYPE dxgi_swapchain_Present(IDXGISwapChain *iface, U
 static HRESULT STDMETHODCALLTYPE dxgi_swapchain_GetBuffer(IDXGISwapChain *iface,
         UINT buffer_idx, REFIID riid, void **surface)
 {
-    struct dxgi_swapchain *This = (struct dxgi_swapchain *)iface;
+    struct dxgi_swapchain *This = impl_from_IDXGISwapChain(iface);
     struct wined3d_surface *backbuffer;
     IUnknown *parent;
     HRESULT hr;
@@ -271,7 +276,7 @@ HRESULT dxgi_swapchain_init(struct dxgi_swapchain *swapchain, struct dxgi_device
 {
     HRESULT hr;
 
-    swapchain->vtbl = &dxgi_swapchain_vtbl;
+    swapchain->IDXGISwapChain_iface.lpVtbl = &dxgi_swapchain_vtbl;
     swapchain->refcount = 1;
 
     hr = wined3d_swapchain_create(device->wined3d_device, present_parameters,