Invalidate external renderpass descriptors from Quick3D

Change-Id: I362b35b3d038d4fb24fab0e73cb120027f2308ea
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
(cherry picked from commit 93fe74ca433850e505f8f8940e99f3bf6a6dc050)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/src/quick/scenegraph/coreapi/qsgrenderer_p.h b/src/quick/scenegraph/coreapi/qsgrenderer_p.h
index 0c9a424abc..31f00dc738 100644
--- a/src/quick/scenegraph/coreapi/qsgrenderer_p.h
+++ b/src/quick/scenegraph/coreapi/qsgrenderer_p.h
@@ -115,6 +115,18 @@ public:
     void setRenderPassDescriptor(QRhiRenderPassDescriptor *rpDesc) { m_rp_desc = rpDesc; }
     QRhiRenderPassDescriptor *renderPassDescriptor() const { return m_rp_desc; }
 
+    void setExternalRenderPassDescriptor(QRhiRenderPassDescriptor *rpDesc) {
+        if (m_external_rp_desc) {
+            // Changes will be rare in practice - one has to construct a
+            // dynamic Quick 3D scene with reparenting involved for that. Play
+            // nice nonetheless and invalidate as soon as possible.
+            if (m_external_rp_desc != rpDesc)
+                invalidatePipelineCacheDependency(m_external_rp_desc);
+        }
+        m_rp_desc = rpDesc;
+        m_external_rp_desc = rpDesc;
+    }
+
     void setRenderPassRecordingCallbacks(QSGRenderContext::RenderPassCallback start,
                                          QSGRenderContext::RenderPassCallback end,
                                          void *userData)
@@ -150,6 +162,7 @@ protected:
     QRhiRenderTarget *m_rt;
     QRhiCommandBuffer *m_cb;
     QRhiRenderPassDescriptor *m_rp_desc;
+    QRhiRenderPassDescriptor *m_external_rp_desc;
     struct {
         QSGRenderContext::RenderPassCallback start = nullptr;
         QSGRenderContext::RenderPassCallback end = nullptr;