d2d1/effect: Recreate transform graph when input count changes.

dlls/d2d1/effect.c

@@ -189,7 +189,7 @@ static HRESULT STDMETHODCALLTYPE d2d_effect_impl_PrepareForRender(ID2D1EffectImp
 
 static HRESULT STDMETHODCALLTYPE d2d_effect_impl_SetGraph(ID2D1EffectImpl *iface, ID2D1TransformGraph *graph)
 {
-    return E_NOTIMPL;
+    return S_OK;
 }
 
 static const ID2D1EffectImplVtbl d2d_effect_impl_vtbl =
@@ -1045,6 +1045,7 @@ static void d2d_effect_cleanup(struct d2d_effect *effect)
     }
     free(effect->inputs);
     ID2D1EffectContext_Release(&effect->effect_context->ID2D1EffectContext_iface);
+    if (effect->graph)
         ID2D1TransformGraph_Release(&effect->graph->ID2D1TransformGraph_iface);
     d2d_effect_properties_cleanup(&effect->properties);
     if (effect->impl)
@@ -1239,6 +1240,8 @@ static void STDMETHODCALLTYPE d2d_effect_SetInput(ID2D1Effect *iface, UINT32 ind
 
 static HRESULT d2d_effect_set_input_count(struct d2d_effect *effect, UINT32 count)
 {
+    bool initialized = effect->inputs != NULL;
+    HRESULT hr = S_OK;
     unsigned int i;
 
     if (count == effect->input_count)
@@ -1251,10 +1254,9 @@ static HRESULT d2d_effect_set_input_count(struct d2d_effect *effect, UINT32 coun
             if (effect->inputs[i])
                 ID2D1Image_Release(effect->inputs[i]);
         }
-        effect->input_count = count;
-        return S_OK;
     }
-
+    else
+    {
         if (!d2d_array_reserve((void **)&effect->inputs, &effect->inputs_size,
                 count, sizeof(*effect->inputs)))
         {
@@ -1263,9 +1265,23 @@ static HRESULT d2d_effect_set_input_count(struct d2d_effect *effect, UINT32 coun
         }
 
         memset(&effect->inputs[effect->input_count], 0, sizeof(*effect->inputs) * (count - effect->input_count));
+    }
     effect->input_count = count;
 
-    return S_OK;
+    if (initialized)
+    {
+        ID2D1TransformGraph_Release(&effect->graph->ID2D1TransformGraph_iface);
+        effect->graph = NULL;
+
+        if (!(effect->graph = calloc(1, sizeof(*effect->graph))))
+            return E_OUTOFMEMORY;
+        d2d_transform_graph_init(effect->graph);
+
+        if (FAILED(hr = ID2D1EffectImpl_SetGraph(effect->impl, &effect->graph->ID2D1TransformGraph_iface)))
+            WARN("Failed to set a new transform graph, hr %#lx.\n", hr);
+    }
+
+    return hr;
 }
 
 static HRESULT STDMETHODCALLTYPE d2d_effect_SetInputCount(ID2D1Effect *iface, UINT32 count)

dlls/d2d1/tests/d2d1.c

@@ -11166,7 +11166,12 @@ static HRESULT STDMETHODCALLTYPE effect_impl_PrepareForRender(ID2D1EffectImpl *i
 
 static HRESULT STDMETHODCALLTYPE effect_impl_SetGraph(ID2D1EffectImpl *iface, ID2D1TransformGraph *graph)
 {
-    return E_NOTIMPL;
+    struct effect_impl *effect_impl = impl_from_ID2D1EffectImpl(iface);
+
+    ID2D1TransformGraph_Release(effect_impl->transform_graph);
+    ID2D1TransformGraph_AddRef(effect_impl->transform_graph = graph);
+
+    return S_OK;
 }
 
 static const ID2D1EffectImplVtbl effect_impl_vtbl =
@@ -11496,6 +11501,13 @@ static void test_effect_register(BOOL d3d11)
             (BYTE *)&integer, sizeof(integer));
     ok(hr == S_OK, "Got unexpected hr %#lx.\n", hr);
     ok(integer == 3, "Unexpected data %u.\n", integer);
+    hr = ID2D1Effect_SetInputCount(effect, 4);
+    ok(hr == S_OK, "Got unexpected hr %#lx.\n", hr);
+    hr = ID2D1Effect_GetValue(effect, D2D1_PROPERTY_INPUTS, D2D1_PROPERTY_TYPE_ARRAY,
+            (BYTE *)&integer, sizeof(integer));
+    ok(hr == S_OK, "Got unexpected hr %#lx.\n", hr);
+    ok(integer == 3, "Unexpected data %u.\n", integer);
+
     ID2D1Effect_Release(effect);
 
     hr = ID2D1Factory1_UnregisterEffect(factory, &CLSID_TestEffect);