Józef Kucia : dxgi: Implement d3d12_swapchain_GetCurrentBackBufferIndex().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 71b29963c588f6cf558f3e7ccc23a476438b22ff
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=71b29963c588f6cf558f3e7cc...

Author: Józef Kucia <jkucia(a)codeweavers.com>
Date:   Thu May 31 12:04:34 2018 +0200

dxgi: Implement d3d12_swapchain_GetCurrentBackBufferIndex().

Signed-off-by: Józef Kucia <jkucia(a)codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet(a)codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard(a)winehq.org>

---

 dlls/dxgi/swapchain.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/dlls/dxgi/swapchain.c b/dlls/dxgi/swapchain.c
index d7b7288..76c674a 100644
--- a/dlls/dxgi/swapchain.c
+++ b/dlls/dxgi/swapchain.c
@@ -1291,9 +1291,11 @@ static HRESULT STDMETHODCALLTYPE d3d12_swapchain_GetMatrixTransform(IDXGISwapCha
 
 static UINT STDMETHODCALLTYPE d3d12_swapchain_GetCurrentBackBufferIndex(IDXGISwapChain3 *iface)
 {
-    FIXME("iface %p stub!\n", iface);
+    struct d3d12_swapchain *swapchain = d3d12_swapchain_from_IDXGISwapChain3(iface);
+
+    TRACE("iface %p.\n", iface);
 
-    return 0;
+    return swapchain->current_buffer_index;
 }
 
 static HRESULT STDMETHODCALLTYPE d3d12_swapchain_CheckColorSpaceSupport(IDXGISwapChain3 *iface,