molstar/lib/commonjs/mol-gl/shader/bloom/luminosity.frag.js

A comprehensive macromolecular library.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.luminosity_frag = void 0;
exports.luminosity_frag = `
precision highp float;
precision highp int;
precision highp sampler2D;

uniform sampler2D tColor;
uniform sampler2D tEmissive;
uniform sampler2D tDepth;
uniform vec2 uTexSizeInv;

uniform vec3 uDefaultColor;
uniform float uDefaultOpacity;
uniform float uLuminosityThreshold;
uniform float uSmoothWidth;

#include common

float getDepth(const in vec2 coords) {
    #ifdef depthTextureSupport
        return texture2D(tDepth, coords).r;
    #else
        return unpackRGBAToDepth(texture2D(tDepth, coords));
    #endif
}

bool isBackground(const in float depth) {
    return depth == 1.0;
}

void main(void) {
    vec2 coords = gl_FragCoord.xy * uTexSizeInv;
    vec4 texel = texture2D(tColor, coords);
    float emissive = texture2D(tEmissive, coords).a;
    float depth = getDepth(coords);

    if (isBackground(depth)) {
        gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0);
        return;
    }

    vec4 outputColor = vec4(uDefaultColor.rgb, uDefaultOpacity);

    #if defined(dMode_luminosity)
        vec3 luma = vec3(0.299, 0.587, 0.114);
        float v = dot(texel.xyz, luma);
        float alpha = smoothstep(uLuminosityThreshold, uLuminosityThreshold + uSmoothWidth, v);

        gl_FragColor = mix(outputColor, texel, alpha);
    #elif defined(dMode_emissive)
        gl_FragColor = mix(outputColor, texel, emissive);
    #endif
}
`;