dxgi: Implement d3d12_swapchain_GetMaximumFrameLatency().

Signed-off-by: Philip Rebohle <philip.rebohle@tu-dortmund.de> Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dxgi: Implement d3d12_swapchain_GetMaximumFrameLatency().
85710526 · Philip Rebohle · Alexandre Julliard · 440320ce · 85710526
Commit 85710526 authored Apr 17, 2020 by Philip Rebohle Committed by Alexandre Julliard Apr 17, 2020
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swapchain.c dlls/dxgi/swapchain.c +11 -2

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--- a/dlls/dxgi/swapchain.c
+++ b/dlls/dxgi/swapchain.c
@@ -2630,9 +2630,18 @@ static HRESULT STDMETHODCALLTYPE d3d12_swapchain_SetMaximumFrameLatency(IDXGISwa

 static HRESULT STDMETHODCALLTYPE d3d12_swapchain_GetMaximumFrameLatency(IDXGISwapChain3 *iface, UINT *max_latency)
 {
-    FIXME("iface %p, max_latency %p stub!\n", iface, max_latency);
+    struct d3d12_swapchain *swapchain = d3d12_swapchain_from_IDXGISwapChain3(iface);

-    return E_NOTIMPL;
+    TRACE("iface %p, max_latency %p.\n", iface, max_latency);
+
+    if (!(swapchain->desc.Flags & DXGI_SWAP_CHAIN_FLAG_FRAME_LATENCY_WAITABLE_OBJECT))
+    {
+        WARN("DXGI_SWAP_CHAIN_FLAG_FRAME_LATENCY_WAITABLE_OBJECT not set for swap chain %p.\n", iface);
+        return DXGI_ERROR_INVALID_CALL;
+    }
+
+    *max_latency = swapchain->frame_latency;
+    return S_OK;
 }

 static HANDLE STDMETHODCALLTYPE d3d12_swapchain_GetFrameLatencyWaitableObject(IDXGISwapChain3 *iface)