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https://github.com/DanielnetoDotCom/YouPHPTube
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56 lines
1 KiB
JavaScript
56 lines
1 KiB
JavaScript
/**
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* Brightness and contrast adjustment
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* https://github.com/evanw/glfx.js
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* brightness: -1 to 1 (-1 is solid black, 0 is no change, and 1 is solid white)
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* contrast: -1 to 1 (-1 is solid gray, 0 is no change, and 1 is maximum contrast)
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*/
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THREE.BrightnessContrastShader = {
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uniforms: {
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'tDiffuse': { value: null },
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'brightness': { value: 0 },
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'contrast': { value: 0 }
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},
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vertexShader: [
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'varying vec2 vUv;',
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'void main() {',
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' vUv = uv;',
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' gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',
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'}'
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].join( '\n' ),
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fragmentShader: [
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'uniform sampler2D tDiffuse;',
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'uniform float brightness;',
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'uniform float contrast;',
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'varying vec2 vUv;',
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'void main() {',
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' gl_FragColor = texture2D( tDiffuse, vUv );',
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' gl_FragColor.rgb += brightness;',
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' if (contrast > 0.0) {',
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' gl_FragColor.rgb = (gl_FragColor.rgb - 0.5) / (1.0 - contrast) + 0.5;',
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' } else {',
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' gl_FragColor.rgb = (gl_FragColor.rgb - 0.5) * (1.0 + contrast) + 0.5;',
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' }',
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'}'
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].join( '\n' )
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};
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