Reimplement UniformAnimator for ShaderEffect

Fixes: QTBUG-83976
Change-Id: I307e96be0d3d2edeb8d9065d100c1ef38c8824c7
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

1 files changed, 52 insertions, 0 deletions

diff --git a/tests/manual/scenegraph_lancelot/data/shaders/propertyanimation/uniformanimator_stall.qml b/tests/manual/scenegraph_lancelot/data/shaders/propertyanimation/uniformanimator_stall.qml
new file mode 100644
index 0000000000..e62c64e3ae
--- /dev/null
+++ b/tests/manual/scenegraph_lancelot/data/shaders/propertyanimation/uniformanimator_stall.qml
@@ -0,0 +1,52 @@
+import QtQuick 2.12
+
+// This test is a rotating rectangle with a uniform animator changing its color.
+// There is a timer interrupting the rotation, but the uniform animator will still
+// run. This is repeated a few times and then all animation is stopped.
+
+Item {
+    width: 320
+    height: 320
+    visible: true
+
+    function stall(milliseconds) {
+        var startTime = new Date().getTime();
+        while ((new Date().getTime()) - startTime < milliseconds) {}
+    }
+
+    ShaderEffect {
+        id: shader
+        x: 60
+        y: 60
+        width: 200
+        height: 200
+        property real colorProperty: 0.0
+        fragmentShader: "qrc:shaders/property.frag"
+        UniformAnimator {
+            id: animator
+            target: shader
+            uniform: "colorProperty"
+            duration: 950
+            from: 0.0
+            to: 1.0
+            loops: 10
+            running: true
+        }
+        NumberAnimation on rotation { from: 0;to: 360; duration: 2500; loops: 1 }
+    }
+
+    Timer {
+        interval: 600; running: true; repeat: true;
+        property int num_repeats: 0
+        onTriggered: {
+            if (num_repeats < 3) {
+                stall(550);
+            } else {
+                animator.running = false;
+                repeat = false;
+            }
+
+            num_repeats += 1;
+        }
+    }
+}