d3d11: Do not return uninitialized values on Map() failure.

dlls/d3d11/device.c

@@ -799,18 +799,21 @@ static HRESULT STDMETHODCALLTYPE d3d11_device_context_Map(ID3D11DeviceContext1 *
     if (map_flags)
         FIXME("Ignoring map_flags %#x.\n", map_flags);
 
+    mapped_subresource->pData = NULL;
+
     if (context->type != D3D11_DEVICE_CONTEXT_IMMEDIATE
             && map_type != D3D11_MAP_WRITE_DISCARD && map_type != D3D11_MAP_WRITE_NO_OVERWRITE)
         return E_INVALIDARG;
 
     wined3d_resource = wined3d_resource_from_d3d11_resource(resource);
 
-    hr = wined3d_device_context_map(context->wined3d_context, wined3d_resource, subresource_idx,
-            &map_desc, NULL, wined3d_map_flags_from_d3d11_map_type(map_type));
-
-    mapped_subresource->pData = map_desc.data;
-    mapped_subresource->RowPitch = map_desc.row_pitch;
-    mapped_subresource->DepthPitch = map_desc.slice_pitch;
+    if (SUCCEEDED(hr = wined3d_device_context_map(context->wined3d_context, wined3d_resource, subresource_idx,
+            &map_desc, NULL, wined3d_map_flags_from_d3d11_map_type(map_type))))
+    {
+        mapped_subresource->pData = map_desc.data;
+        mapped_subresource->RowPitch = map_desc.row_pitch;
+        mapped_subresource->DepthPitch = map_desc.slice_pitch;
+    }
 
     return hr;
 }

dlls/d3d11/tests/d3d11.c

@@ -14934,8 +14934,14 @@ static void test_resource_map(void)
     hr = ID3D11Device_CreateBuffer(device, &buffer_desc, NULL, &buffer);
     ok(hr == S_OK, "Got unexpected hr %#lx.\n", hr);
 
+    mapped_subresource.pData = (void *)0xdeadbeef;
+    mapped_subresource.RowPitch = 0xabab;
+    mapped_subresource.DepthPitch = 0xcdcd;
     hr = ID3D11DeviceContext_Map(context, (ID3D11Resource *)buffer, 1, D3D11_MAP_READ, 0, &mapped_subresource);
     ok(hr == E_INVALIDARG, "Got unexpected hr %#lx.\n", hr);
+    ok(!mapped_subresource.pData, "Unexpected pointer %p.\n", mapped_subresource.pData);
+    ok(mapped_subresource.RowPitch == 0xabab, "Unexpected row pitch value %u.\n", mapped_subresource.RowPitch);
+    ok(mapped_subresource.DepthPitch == 0xcdcd, "Unexpected depth pitch value %u.\n", mapped_subresource.DepthPitch);
 
     memset(&mapped_subresource, 0, sizeof(mapped_subresource));
     hr = ID3D11DeviceContext_Map(context, (ID3D11Resource *)buffer, 0, D3D11_MAP_WRITE, 0, &mapped_subresource);
@@ -14972,8 +14978,14 @@ static void test_resource_map(void)
     hr = ID3D11Device_CreateTexture2D(device, &texture2d_desc, NULL, &texture2d);
     ok(hr == S_OK, "Got unexpected hr %#lx.\n", hr);
 
+    mapped_subresource.pData = (void *)0xdeadbeef;
+    mapped_subresource.RowPitch = 0xabab;
+    mapped_subresource.DepthPitch = 0xcdcd;
     hr = ID3D11DeviceContext_Map(context, (ID3D11Resource *)texture2d, 1, D3D11_MAP_READ, 0, &mapped_subresource);
     ok(hr == E_INVALIDARG, "Got unexpected hr %#lx.\n", hr);
+    ok(!mapped_subresource.pData, "Unexpected pointer %p.\n", mapped_subresource.pData);
+    ok(mapped_subresource.RowPitch == 0xabab, "Unexpected row pitch value %u.\n", mapped_subresource.RowPitch);
+    ok(mapped_subresource.DepthPitch == 0xcdcd, "Unexpected depth pitch value %u.\n", mapped_subresource.DepthPitch);
 
     memset(&mapped_subresource, 0, sizeof(mapped_subresource));
     hr = ID3D11DeviceContext_Map(context, (ID3D11Resource *)texture2d, 0, D3D11_MAP_WRITE, 0, &mapped_subresource);
@@ -33285,8 +33297,14 @@ static void test_deferred_context_map(void)
     hr = ID3D11Device_CreateBuffer(device, &buffer_desc, &resource_data, &buffer2);
     ok(hr == S_OK, "Got unexpected hr %#lx.\n", hr);
 
+    map_desc.pData = (void *)0xdeadbeef;
+    map_desc.RowPitch = 0xabab;
+    map_desc.DepthPitch = 0xcdcd;
     hr = ID3D11DeviceContext_Map(deferred, (ID3D11Resource *)buffer, 0, D3D11_MAP_READ, 0, &map_desc);
     ok(hr == E_INVALIDARG, "Got unexpected hr %#lx.\n", hr);
+    ok(!map_desc.pData, "Unexpected pointer %p.\n", map_desc.pData);
+    ok(map_desc.RowPitch == 0xabab, "Unexpected row pitch value %u.\n", map_desc.RowPitch);
+    ok(map_desc.DepthPitch == 0xcdcd, "Unexpected depth pitch value %u.\n", map_desc.DepthPitch);
 
     hr = ID3D11DeviceContext_Map(deferred, (ID3D11Resource *)buffer, 0, D3D11_MAP_READ_WRITE, 0, &map_desc);
     ok(hr == E_INVALIDARG, "Got unexpected hr %#lx.\n", hr);