mirror of
https://github.com/Orama-Interactive/Pixelorama.git
synced 2025-01-18 17:19:50 +00:00
22 lines
518 B
Plaintext
22 lines
518 B
Plaintext
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shader_type canvas_item;
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render_mode unshaded;
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uniform sampler2D lut;
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void fragment() {
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vec4 color = texture(TEXTURE, UV);
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vec4 similar = texture(lut, vec2(0.5 / 256.0, 0.5));
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float index = 0.0;
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if (color.a > 0.0) {
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float dist = distance(color.xyz, similar.xyz);
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for (int i = 1; i < 256; i++) {
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vec4 c = texture(lut, vec2((float(i) + 0.5) / 256.0, 0.5));
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float d = distance(color.xyz, c.xyz);
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if (d < dist) {
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dist = d;
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index = float(i) / 255.0;
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}
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}
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}
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COLOR = vec4(vec3(index), 1.0);
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}
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