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February 8, 2018 20:40
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Simple Contrast Adjustment Shader
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| #version 330 core | |
| in vec2 vTexCoord0; | |
| out vec4 oColor; | |
| uniform sampler2D uTex0; | |
| uniform vec2 uResolution; | |
| uniform float uExponent; //good values will be between 5 and 15 | |
| uniform float uShift; //good values will be between 0 and 1 | |
| void main(void) { | |
| //get original pixel | |
| vec4 pix = texture( uTex0, vTexCoord0 ); | |
| //adjust the contrast by shifting the median | |
| //value and applying an exponential | |
| oColor = clamp( pow( pix + uShift, uExponent ), 0.0f, 1.0f); | |
| } |
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