EffectComposer: Fix generated code for mipmap effects

Mipmap effects need layer.smooth and layer.mipmap to work correctly.

Fixes: QDS-11793
Change-Id: I8f04ca9f144f51d0032d995c2bafdcb0c95ad73d
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>

src/plugins/effectcomposer/effectcomposermodel.cpp

@@ -618,6 +618,20 @@ R"(
 )"
     };
 
+    if (m_shaderFeatures.enabled(ShaderFeatures::Mipmap)) {
+        QString mipmap1{
+            R"(parent.layer.smooth = true
+            parent.layer.mipmap = true
+            %1)"
+        };
+        QString mipmap2{
+            R"(_oldParent.layer.smooth = false
+            _oldParent.layer.mipmap = false
+            %2)"
+        };
+        parentChanged = parentChanged.arg(mipmap1, mipmap2);
+    }
+
     parentChanged = parentChanged.arg(m_shaderFeatures.enabled(ShaderFeatures::Source)
                                           ? QString("source = parent") : QString(),
                                       m_shaderFeatures.enabled(ShaderFeatures::Source)

src/plugins/effectcomposer/shaderfeatures.cpp

@@ -73,8 +73,12 @@ void ShaderFeatures::checkLine(const QString &line, Features &features)
         if (m_gridMeshWidth > 1 || m_gridMeshHeight > 1)
             features.setFlag(GridMesh, true);
     }
+
     if (line.contains("@blursources"))
         features.setFlag(BlurSources, true);
+
+    if (line.contains("textureLod("))
+        features.setFlag(Mipmap, true);
 }
 
 int ShaderFeatures::gridMeshHeight() const

src/plugins/effectcomposer/shaderfeatures.h

@@ -19,7 +19,8 @@ public:
         Mouse       = 1 << 4,
         FragCoord   = 1 << 5,
         GridMesh    = 1 << 6,
-        BlurSources = 1 << 7
+        BlurSources = 1 << 7,
+        Mipmap      = 1 << 8
     };
     Q_DECLARE_FLAGS(Features, Feature)