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import QtQuick 1.0
import Qt.labs.shaders 1.0

ShaderEffectItem {
    id: effect
    property real ratio: 1.0
    property variant source: 0

    fragmentShader:
        "
        varying highp vec2 qt_TexCoord0;
        uniform sampler2D source;
        uniform highp float ratio;
        void main(void)
        {
            lowp vec4 textureColor = texture2D(source, qt_TexCoord0.st);
            lowp float gray = dot(textureColor, vec4(0.299, 0.587, 0.114, 0.0));
            gl_FragColor = vec4(gray * ratio + textureColor.r * (1.0 - ratio), gray * ratio + textureColor.g * (1.0 - ratio), gray * ratio + textureColor.b * (1.0 - ratio), textureColor.a);
        }
        "
}