1 files changed, 4 insertions, 3 deletions
diff --git a/src/effects/private/qgfxshaderbuilder.cpp b/src/effects/private/qgfxshaderbuilder.cpp
index 81a3c12..fe1d7fe 100644
--- a/src/effects/private/qgfxshaderbuilder.cpp
+++ b/src/effects/private/qgfxshaderbuilder.cpp
@@ -312,10 +312,11 @@ QVariantMap QGfxShaderBuilder::gaussianBlur(const QJSValue &parameters)
     int requestedSamples = requestedRadius * 2 + 1;
     int samples = 1 + requestedSamples / 2;
     int radius = requestedSamples / 4;
+    bool fallback = parameters.property(QStringLiteral("fallback")).toBool();
 
     QVariantMap result;
 
-    if (samples > m_maxBlurSamples || masked) {
+    if (samples > m_maxBlurSamples || masked || fallback) {
         QByteArray fragShader;
         if (masked)
             fragShader += "uniform mediump sampler2D mask;\n";
@@ -354,9 +355,9 @@ QVariantMap QGfxShaderBuilder::gaussianBlur(const QJSValue &parameters)
                 fragShader += ".a";
             fragShader += ";\n";
         }
-        fragShader += "    const mediump float wSum = ";
+        fragShader += "    const mediump float wSum = float(";
         fragShader += QByteArray::number(wSum);
-        fragShader += ";\n"
+        fragShader += ");\n"
             "    gl_FragColor = ";
         if (alphaOnly)
             fragShader += "mix(vec4(0), color, clamp((result / wSum) / thickness, 0.0, 1.0)) * qt_Opacity;\n";