1 files changed, 28 insertions, 0 deletions
diff --git a/basicsuite/Graphical Effects/Checkers.qml b/basicsuite/Graphical Effects/Checkers.qml
new file mode 100644
index 0000000..9ebdcff
--- /dev/null
+++ b/basicsuite/Graphical Effects/Checkers.qml
@@ -0,0 +1,28 @@
+import QtQuick 2.0
+
+
+// The checkers background
+ShaderEffect {
+
+    property real tileSize: 16
+    property color color1: Qt.rgba(0.7, 0.7, 0.7, 1);
+    property color color2: Qt.rgba(0.6, 0.6, 0.6, 1);
+
+    property size _pixelSize: Qt.size(Math.PI * width / tileSize, Math.PI * height / tileSize);
+
+    fragmentShader:
+        "
+        uniform lowp vec4 color1;
+        uniform lowp vec4 color2;
+        uniform lowp float qt_Opacity;
+        uniform highp vec2 _pixelSize;
+        varying highp vec2 qt_TexCoord0;
+        void main() {
+            highp vec2 tc = sign(sin(qt_TexCoord0 * _pixelSize));
+            if (tc.x != tc.y)
+                gl_FragColor = color1 * qt_Opacity;
+            else
+                gl_FragColor = color2 * qt_Opacity;
+        }
+        "
+}