Introduce QOpenGLWindow

[ChangeLog] Added QOpenGLWindow. This serves as a convenience class for
creating windows showing OpenGL content via an API similar to QGLWidget
and without any widget dependencies.

Done-with: Jorgen Lind <jorgen.lind@digia.com>
Task-number: QTBUG-36899
Change-Id: I52e9bc61acb129dbfd3841b3adeffab2dbcf7f05
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/examples/opengl/qopenglwindow/background.frag b/examples/opengl/qopenglwindow/background.frag
new file mode 100644
index 0000000000..067c3505dc
--- /dev/null
+++ b/examples/opengl/qopenglwindow/background.frag
@@ -0,0 +1,24 @@
+uniform highp int currentTime;
+uniform highp vec2 windowSize;
+
+float noise(vec2 co)
+{
+    return 0.5 * fract(sin(dot(co.xy, vec2(12.9898,78.233))) * 43758.5453);
+}
+
+float curvSpeed()
+{
+   return mod(float(currentTime), 1000000.0) / 500.0;
+}
+
+float curv()
+{
+    return 1.0 - abs((gl_FragCoord.y / (windowSize.y / 10.0) - 5.0) - sin((gl_FragCoord.x / (windowSize.x/20.0)) - curvSpeed()));
+}
+
+void main()
+{
+    float coordNoise = noise(gl_FragCoord.xy);
+    float proximity = smoothstep(0.5, 1.0, (curv() + 1.0) * (coordNoise ));
+    gl_FragColor = vec4(coordNoise, coordNoise, coordNoise, 1.0) * proximity;
+}