Support alpha channel initial work

In this initial work, all (almost) color properties are converted into a new type (float4) to
support an alpha channel. Alpha channel option is shown in the color dialog for Layer and Scene
background properties only. The following is remaining:
- Scene background alpha doesn't work in the editor (works in the viewer RT1)

Task-number: QT3DS-3128
Change-Id: Ib5540ebc8e2ff68709473451e4a92bf66ddb8ad2
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/Runtime/Source/runtimerender/q3dsqmlrender.h b/src/Runtime/Source/runtimerender/q3dsqmlrender.h
index 12d459cf..99b395de 100644
--- a/src/Runtime/Source/runtimerender/q3dsqmlrender.h
+++ b/src/Runtime/Source/runtimerender/q3dsqmlrender.h
@@ -65,7 +65,7 @@ public:
                          NVRenderContext &/*inRenderContext*/,
                          QT3DSVec2 /*inPresentationScaleFactor*/,
                          SScene::RenderClearCommand /*inColorBufferNeedsClear*/,
-                         QT3DSVec3 /*inclearColor*/,
+                         QT3DSVec4 /*inclearColor*/,
                          const SRenderInstanceId /*instanceId*/) override {}
 
     IGraphObjectPickQuery *GetGraphObjectPickQuery(const SRenderInstanceId instanceId) override