From 417cf07c5dfdb07ddb547dfe3e7529fee700cc79 Mon Sep 17 00:00:00 2001
From: Lorn Potter <lorn.potter@gmail.com>
Date: Fri, 22 Dec 2023 17:36:41 +1000
Subject: [PATCH] wasm: provide isValid implementation for
 QWasmOffscreenSurface
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Fixes: QTBUG-120350
Pick-to: 6.6
Change-Id: I0cb2ba66a2d27f3d96a4a6a1cb85695f6b305178
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
(cherry picked from commit 139d57a7e906b84672024661a58628918ceff928)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/plugins/platforms/wasm/qwasmoffscreensurface.cpp | 5 +++++
 src/plugins/platforms/wasm/qwasmoffscreensurface.h   | 1 +
 2 files changed, 6 insertions(+)

diff --git a/src/plugins/platforms/wasm/qwasmoffscreensurface.cpp b/src/plugins/platforms/wasm/qwasmoffscreensurface.cpp
index 0191e0b2165..dcfc4433e6f 100644
--- a/src/plugins/platforms/wasm/qwasmoffscreensurface.cpp
+++ b/src/plugins/platforms/wasm/qwasmoffscreensurface.cpp
@@ -27,4 +27,9 @@ QWasmOffscreenSurface::~QWasmOffscreenSurface()
     emscripten::val::module_property("specialHTMLTargets").delete_(m_specialTargetId);
 }
 
+bool QWasmOffscreenSurface::isValid() const
+{
+    return !m_offscreenCanvas.isNull() && !m_offscreenCanvas.isUndefined();
+}
+
 QT_END_NAMESPACE
diff --git a/src/plugins/platforms/wasm/qwasmoffscreensurface.h b/src/plugins/platforms/wasm/qwasmoffscreensurface.h
index 38a991f4cee..1c713104481 100644
--- a/src/plugins/platforms/wasm/qwasmoffscreensurface.h
+++ b/src/plugins/platforms/wasm/qwasmoffscreensurface.h
@@ -20,6 +20,7 @@ public:
     ~QWasmOffscreenSurface() final;
 
     const std::string &id() const { return m_specialTargetId; }
+    bool isValid() const override;
 
 private:
     std::string m_specialTargetId;