{
    "QEN": {
        "description": "The FastBlur effect softens the source content by blurring it with algorithm which uses the source content downscaling and bilinear filtering.",
        "fragmentCode": [
            "@requires BlurHelper",
            "@main",
            "{",
            "    vec4 blurredColor = texture(iSource, texCoord) * blurWeight1[0];",
            "    blurredColor += texture(iSourceBlur1, texCoord) * blurWeight1[1];",
            "#if (BLUR_HELPER_MAX_LEVEL > 2)",
            "    blurredColor += texture(iSourceBlur2, texCoord) * blurWeight1[2];",
            "#endif",
            "#if (BLUR_HELPER_MAX_LEVEL > 8)",
            "    blurredColor += texture(iSourceBlur3, texCoord) * blurWeight1[3];",
            "#endif",
            "#if (BLUR_HELPER_MAX_LEVEL > 16)",
            "    blurredColor += texture(iSourceBlur4, texCoord) * blurWeight2[0];",
            "#endif",
            "#if (BLUR_HELPER_MAX_LEVEL > 32)",
            "    blurredColor += texture(iSourceBlur5, texCoord) * blurWeight2[1];",
            "#endif",
            "",
            "    fragColor = blurredColor;",
            "}"
        ],
        "name": "Fast Blur",
        "properties": [
            {
                "defaultValue": "0",
                "description": "Sets the amount of blur.",
                "maxValue": "1",
                "minValue": "0",
                "name": "fastBlurAmount",
                "displayName": "Amount",
                "type": "float"
            }
        ],
        "version": 1,
        "vertexCode": [
            "out vec4 blurWeight1;",
            "out vec2 blurWeight2;",
            "",
            "float blurWeight(float v) {",
            "    return max(0.0, min(1.0, 1.0 - v * 2.0));",
            "}",
            "",
            "@main",
            "{",
            "    float blurLod = sqrt(fastBlurAmount * (BLUR_HELPER_MAX_LEVEL / 64.0)) * 1.2 - 0.2;",
            "    float bw1 = blurWeight(abs(blurLod - 0.1));",
            "    float bw2 = blurWeight(abs(blurLod - 0.3));",
            "    float bw3 = blurWeight(abs(blurLod - 0.5));",
            "    float bw4 = blurWeight(abs(blurLod - 0.7));",
            "    float bw5 = blurWeight(abs(blurLod - 0.9));",
            "    float bw6 = blurWeight(abs(blurLod - 1.1));",
            "",
            "    float bsum = bw1 + bw2 + bw3 + bw4 + bw5 + bw6;",
            "    blurWeight1 = vec4(bw1 / bsum, bw2 / bsum, bw3 / bsum, bw4 / bsum);",
            "    blurWeight2 = vec2(bw5 / bsum, bw6 / bsum);",
            "}"
        ]
    }
}
