3 files changed, 21 insertions, 0 deletions
diff --git a/src/plugins/platforms/wasm/qtloader.js b/src/plugins/platforms/wasm/qtloader.js
index 9bacce5944..3cbb1c8aa8 100644
--- a/src/plugins/platforms/wasm/qtloader.js
+++ b/src/plugins/platforms/wasm/qtloader.js
@@ -122,6 +122,8 @@
 //      Add canvas at run-time. Adds a corresponding QScreen,
 // removeCanvasElement
 //      Remove canvas at run-time. Removes the corresponding QScreen.
+// resizeCanvasElement
+//      Signals to the application that a canvas has been resized.
 
 
 var Module = {}
@@ -233,6 +235,7 @@ function QtLoader(config)
     publicAPI.loadEmscriptenModule = loadEmscriptenModule;
     publicAPI.addCanvasElement = addCanvasElement;
     publicAPI.removeCanvasElement = removeCanvasElement;
+    publicAPI.resizeCanvasElement = resizeCanvasElement;
 
     restartCount = 0;
 
@@ -548,6 +551,11 @@ function QtLoader(config)
             console.log("Error: removeCanvasElement can only be called in the Running state");
     }
 
+    function resizeCanvasElement(element) {
+        if (publicAPI.status == "Running")
+            Module.qtResizeCanvasElement(element);
+    }
+
     setStatus("Created");
 
     return publicAPI;
diff --git a/src/plugins/platforms/wasm/qwasmintegration.cpp b/src/plugins/platforms/wasm/qwasmintegration.cpp
index 44b4546dc6..55bb167fcc 100644
--- a/src/plugins/platforms/wasm/qwasmintegration.cpp
+++ b/src/plugins/platforms/wasm/qwasmintegration.cpp
@@ -73,11 +73,18 @@ static void removeCanvasElement(emscripten::val canvas)
     QWasmIntegration::get()->removeScreen(canvasId);
 }
 
+static void resizeCanvasElement(emscripten::val canvas)
+{
+    QString canvasId = QString::fromStdString(canvas["id"].as<std::string>());
+    QWasmIntegration::get()->resizeScreen(canvasId);
+}
+
 EMSCRIPTEN_BINDINGS(qtQWasmIntegraton)
 {
     function("qtBrowserBeforeUnload", &browserBeforeUnload);
     function("qtAddCanvasElement", &addCanvasElement);
     function("qtRemoveCanvasElement", &removeCanvasElement);
+    function("qtResizeCanvasElement", &resizeCanvasElement);
 }
 
 QWasmIntegration *QWasmIntegration::s_instance;
@@ -212,4 +219,9 @@ void QWasmIntegration::removeScreen(const QString &canvasId)
     QWindowSystemInterface::handleScreenRemoved(m_screens.take(canvasId));
 }
 
+void QWasmIntegration::resizeScreen(const QString &canvasId)
+{
+    m_screens.value(canvasId)->updateQScreenAndCanvasRenderSize();
+}
+
 QT_END_NAMESPACE
diff --git a/src/plugins/platforms/wasm/qwasmintegration.h b/src/plugins/platforms/wasm/qwasmintegration.h
index 01ce6ec007..2239bdc118 100644
--- a/src/plugins/platforms/wasm/qwasmintegration.h
+++ b/src/plugins/platforms/wasm/qwasmintegration.h
@@ -77,6 +77,7 @@ public:
 
     void addScreen(const QString &canvasId);
     void removeScreen(const QString &canvasId);
+    void resizeScreen(const QString &canvasId);
 
 private:
     mutable QWasmFontDatabase *m_fontDb;