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/* Copyright (C) 2015, Jaguar Land Rover. All Rights Reserved.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
import QtQuick 2.0
ShaderEffect {
anchors.fill: parent
property color color
property real radius: 16
fragmentShader: "
uniform lowp float radius;
uniform lowp float height;
uniform lowp float width;
uniform lowp float qt_Opacity;
uniform lowp vec4 color;
varying highp vec2 qt_TexCoord0;
void main(void) {
lowp vec2 dist = min(qt_TexCoord0, vec2(1.0) - qt_TexCoord0);
// Border shadow
lowp float xval = smoothstep(0.0, radius, dist.x * width);
lowp float yval = smoothstep(0.0, radius, dist.y * height);
lowp float borderVal = sqrt(yval * xval) * 0.5 + 0.5;
lowp vec4 borderColor = mix(color, vec4(0.0, 0.0, 0.0, 1.0), borderVal);
gl_FragColor = borderColor * qt_Opacity;
}
"
}
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