16 lines
428 B
Text
16 lines
428 B
Text
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shader_type canvas_item;
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uniform vec4 marker_color : source_color = vec4(1.0, 0.0, 0.0, 1.0);
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void fragment() {
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vec4 source = texture(TEXTURE, UV) * COLOR;
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float red_dominance = source.r - max(source.g, source.b);
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float marker_mask = smoothstep(0.04, 0.18, red_dominance);
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vec3 colored_marker = marker_color.rgb * source.r;
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COLOR = vec4(
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mix(source.rgb, colored_marker, marker_mask),
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source.a * marker_color.a
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);
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}
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