mirror of
https://github.com/Ttanasart-pt/Pixel-Composer.git
synced 2024-12-26 15:06:22 +01:00
33 lines
644 B
GLSL
33 lines
644 B
GLSL
//
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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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#ifdef _YY_HLSL11_
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#define PALETTE_LIMIT 1024
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#else
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#define PALETTE_LIMIT 256
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#endif
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uniform vec4 palette[PALETTE_LIMIT];
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uniform float paletteAmount;
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uniform float shift;
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void main() {
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vec4 c = texture2D( gm_BaseTexture, v_vTexcoord );
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float minDist = 999.;
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float index = 0.;
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for(float i = 0.; i < paletteAmount; i++) {
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float _dist = distance(c.rgb, palette[int(i)].rgb);
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if(_dist < minDist) {
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minDist = _dist;
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index = i;
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}
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}
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index = mod(index + shift, paletteAmount);
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gl_FragColor = palette[int(index)];
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}
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