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#ifdef GL_ES
    precision mediump float;
#else
#   define lowp
#   define mediump
#   define highp
#endif // GL_ES

uniform float blurSize;

uniform sampler2D source;
uniform lowp float qt_Opacity;
varying vec2 qt_TexCoord0;

void main()
{
    vec2 uv = qt_TexCoord0.xy;
    vec4 c = vec4(0.0);
    c += texture2D(source, uv - vec2(0.0, 4.0*blurSize)) * 0.05;
    c += texture2D(source, uv - vec2(0.0, 3.0*blurSize)) * 0.09;
    c += texture2D(source, uv - vec2(0.0, 2.0*blurSize)) * 0.12;
    c += texture2D(source, uv - vec2(0.0, 1.0*blurSize)) * 0.15;
    c += texture2D(source, uv) * 0.18;
    c += texture2D(source, uv + vec2(0.0, 1.0*blurSize)) * 0.15;
    c += texture2D(source, uv + vec2(0.0, 2.0*blurSize)) * 0.12;
    c += texture2D(source, uv + vec2(0.0, 3.0*blurSize)) * 0.09;
    c += texture2D(source, uv + vec2(0.0, 4.0*blurSize)) * 0.05;
    // First pass we don't apply opacity
    gl_FragColor = c;
}
