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{
"QEN": {
"description": "This effect adjusts the source item colors. Brightness adjustment changes the perceived luminance of the source item. Contrast adjustment increases or decreases the color and brightness variations.",
"fragmentCode": [
"@main",
"{",
" fragColor.rgb /= max(1.0/256.0, fragColor.a);",
" float c = 1.0 + brightnessContrastContrast;",
" float contrastGainFactor = 1.0 + c * c * c * c * step(0.0, brightnessContrastContrast);",
" fragColor.rgb = ((fragColor.rgb - 0.5) * (contrastGainFactor * brightnessContrastContrast + 1.0)) + 0.5;",
" fragColor.rgb = mix(fragColor.rgb, vec3(step(0.0, brightnessContrastBrightness)), abs(brightnessContrastBrightness));",
" fragColor = vec4(fragColor.rgb * fragColor.a, fragColor.a);",
"}"
],
"name": "BrightnessContrast",
"properties": [
{
"defaultValue": "0",
"description": "This property defines how much the source brightness is increased or decreased.\n\nThe value ranges from -1.0 to 1.0. By default, the property is set to 0.0 (no change).",
"maxValue": "1",
"minValue": "-1",
"name": "brightnessContrastBrightness",
"type": "float"
},
{
"defaultValue": "0",
"description": "This property defines how much the source contrast is increased or decreased. The decrease of the contrast is linear, but the increase is applied with a non-linear curve to allow very high contrast adjustment at the high end of the value range.\n\nThe value ranges from -1.0 to 1.0. By default, the property is set to 0.0 (no change).",
"maxValue": "1",
"minValue": "-1",
"name": "brightnessContrastContrast",
"type": "float"
}
],
"version": 1
}
}