ddraw: Require a non-zero back buffer count for swap chains.

8797a9ed · Henri Verbeet · Alexandre Julliard · 23f47b57 · 8797a9ed
Commit 8797a9ed authored Dec 05, 2013 by Henri Verbeet Committed by Alexandre Julliard Dec 05, 2013
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surface.c dlls/ddraw/surface.c +7 -0

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--- a/dlls/ddraw/surface.c
+++ b/dlls/ddraw/surface.c
@@ -5647,6 +5647,13 @@ HRESULT ddraw_surface_create(struct ddraw *ddraw, const DDSURFACEDESC2 *surface_
                return DDERR_INVALIDCAPS;
            }

+            if (!(desc->dwFlags & DDSD_BACKBUFFERCOUNT) || !desc->dwBackBufferCount)
+            {
+                WARN("Tried to create a flippable primary surface without any back buffers.\n");
+                HeapFree(GetProcessHeap(), 0, texture);
+                return DDERR_INVALIDCAPS;
+            }
+
            if (!(ddraw->cooperative_level & DDSCL_EXCLUSIVE))
            {
                WARN("Tried to create a flippable primary surface without DDSCL_EXCLUSIVE.\n");