Fix rendering after stereoscopic mode switch

When stereoscopic mode is changed, mark layerdata dirty.
This fixes at least presentations with temporalAA on.

Task-number: QT3DS-4067
Change-Id: I99afda71f56e81d1a9b67ba1e2c882b9b33c97ee
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>

2 files changed, 8 insertions, 0 deletions

diff --git a/src/runtimerender/rendererimpl/Qt3DSRendererImplLayerRenderPreparationData.cpp b/src/runtimerender/rendererimpl/Qt3DSRendererImplLayerRenderPreparationData.cpp
index 821a0b8..9c1da26 100644
--- a/src/runtimerender/rendererimpl/Qt3DSRendererImplLayerRenderPreparationData.cpp
+++ b/src/runtimerender/rendererimpl/Qt3DSRendererImplLayerRenderPreparationData.cpp
@@ -155,6 +155,7 @@ namespace render {
         , m_FeaturesDirty(true)
         , m_FeatureSetHash(0)
         , m_TooManyLightsError(false)
+        , m_StereoMode(StereoModes::Mono)
     {
     }
 
@@ -1333,6 +1334,12 @@ namespace render {
                     m_Renderer.PrepareImageForIbl(*m_Layer.m_LightProbe);
                     wasDataDirty = true;
                 }
+                if (m_StereoMode != thePrepResult.getStereoMode()) {
+                    // When stereo mode changes we need to mark data dirty
+                    // for e.g. temporalAA to render correctly.
+                    m_StereoMode = thePrepResult.getStereoMode();
+                    wasDataDirty = true;
+                }
 
                 bool lightProbeValid = HasValidLightProbe(m_Layer.m_LightProbe);
 
diff --git a/src/runtimerender/rendererimpl/Qt3DSRendererImplLayerRenderPreparationData.h b/src/runtimerender/rendererimpl/Qt3DSRendererImplLayerRenderPreparationData.h
index 8b1463a..376749e 100644
--- a/src/runtimerender/rendererimpl/Qt3DSRendererImplLayerRenderPreparationData.h
+++ b/src/runtimerender/rendererimpl/Qt3DSRendererImplLayerRenderPreparationData.h
@@ -296,6 +296,7 @@ namespace render {
         bool m_FeaturesDirty;
         size_t m_FeatureSetHash;
         bool m_TooManyLightsError;
+        StereoModes::Enum m_StereoMode;
 
         // shadow mapps
         NVScopedRefCounted<Qt3DSShadowMap> m_ShadowMapManager;