mirror of
https://github.com/Ttanasart-pt/Pixel-Composer.git
synced 2024-12-27 23:46:56 +01:00
26 lines
656 B
Text
26 lines
656 B
Text
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//
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// Simple passthrough fragment shader
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//
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varying vec2 v_vTexcoord;
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varying vec4 v_vColour;
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uniform sampler2D samH, samS, samV;
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vec3 hsv2rgb(vec3 c) {
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vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
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vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
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return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
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}
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void main() {
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vec4 _h = texture2D( samH, v_vTexcoord );
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vec4 _s = texture2D( samS, v_vTexcoord );
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vec4 _v = texture2D( samV, v_vTexcoord );
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float h = (_h[0] + _h[1] + _h[2]) / 3.;
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float s = (_s[0] + _s[1] + _s[2]) / 3.;
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float v = (_v[0] + _v[1] + _v[2]) / 3.;
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gl_FragColor = vec4(hsv2rgb(vec3(h, s, v)), 1.);
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}
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