ShaderEffect: Allow use of shaders without QML engine

Change-Id: I43a18b94be6d17f6cca745a23bb006515c567de3
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickshadereffect/tst_qquickshadereffect.cpp b/tests/auto/quick/qquickshadereffect/tst_qquickshadereffect.cpp
index f601f520bb..a57b7d4c1f 100644
--- a/tests/auto/quick/qquickshadereffect/tst_qquickshadereffect.cpp
+++ b/tests/auto/quick/qquickshadereffect/tst_qquickshadereffect.cpp
@@ -46,6 +46,10 @@ class TestShaderEffect : public QQuickShaderEffect
     Q_PROPERTY(QMatrix4x4 mat4x4 READ mat4x4Read NOTIFY dummyChanged)
 
 public:
+    TestShaderEffect(QQuickItem* parent = nullptr) : QQuickShaderEffect(parent)
+    {
+    }
+
     QMatrix4x4 mat4x4Read() const { return QMatrix4x4(1,0,0,0,0,1,0,0,0,0,1,0,0,0,0,1); }
     QVariant dummyRead() const { return QVariant(); }
 
@@ -79,6 +83,8 @@ private slots:
     void deleteShaderEffectSource();
     void twoImagesOneShaderEffect();
 
+    void withoutQmlEngine();
+
 private:
     enum PresenceFlags {
         VertexPresent = 0x01,
@@ -320,6 +326,16 @@ void tst_qquickshadereffect::twoImagesOneShaderEffect()
     delete view;
 }
 
+void tst_qquickshadereffect::withoutQmlEngine()
+{
+    // using a shader without QML engine used to crash
+    auto window = new QQuickWindow;
+    auto shaderEffect = new TestShaderEffect(window->contentItem());
+    shaderEffect->setVertexShader("");
+    QVERIFY(shaderEffect->isComponentComplete());
+    delete window;
+}
+
 QTEST_MAIN(tst_qquickshadereffect)
 
 #include "tst_qquickshadereffect.moc"