Fixed invalid GLSL in openglunderqml example.

First argument to pow is not allowed to be negative.

Task-number: QTBUG-30191
Change-Id: Iac6c25d84e26777564d6741690aab552a0bb513e
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>

diff --git a/examples/quick/scenegraph/openglunderqml/squircle.cpp b/examples/quick/scenegraph/openglunderqml/squircle.cpp
index 8e34144..84509fb 100644 (file)
--- a/examples/quick/scenegraph/openglunderqml/squircle.cpp
+++ b/examples/quick/scenegraph/openglunderqml/squircle.cpp
@@ -108,7 +108,7 @@ void Squircle::paint()
                                            "uniform lowp float t;"
                                            "varying highp vec2 coords;"
                                            "void main() {"
-                                           "    lowp float i = 1. - (pow(coords.x, 4.) + pow(coords.y, 4.));"
+                                           "    lowp float i = 1. - (pow(abs(coords.x), 4.) + pow(abs(coords.y), 4.));"
                                            "    i = smoothstep(t - 0.8, t + 0.8, i);"
                                            "    i = floor(i * 20.) / 20.;"
                                            "    gl_FragColor = vec4(coords * .5 + .5, i, i);"