Migrate shadereffects example to be cross-backend

...while demonstrating best practices like file selectors.

Task-number: QTBUG-52914
Change-Id: Ibf7bca77b7b142f5ccb956e05efc5be974d53c79
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

1 files changed, 14 insertions, 0 deletions

diff --git a/examples/quick/shadereffects/content/shaders/blur.frag b/examples/quick/shadereffects/content/shaders/blur.frag
new file mode 100644
index 0000000000..9173945eed
--- /dev/null
+++ b/examples/quick/shadereffects/content/shaders/blur.frag
@@ -0,0 +1,14 @@
+uniform lowp float qt_Opacity;
+uniform sampler2D source;
+uniform highp vec2 delta;
+
+varying highp vec2 qt_TexCoord0;
+
+void main()
+{
+    gl_FragColor =(0.0538 * texture2D(source, qt_TexCoord0 - 3.182 * delta)
+                 + 0.3229 * texture2D(source, qt_TexCoord0 - 1.364 * delta)
+                 + 0.2466 * texture2D(source, qt_TexCoord0)
+                 + 0.3229 * texture2D(source, qt_TexCoord0 + 1.364 * delta)
+                 + 0.0538 * texture2D(source, qt_TexCoord0 + 3.182 * delta)) * qt_Opacity;
+}