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@@ -0,0 +1,404 @@
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+/**
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+ * @author zz85 / https://github.com/zz85 | twitter.com/blurspline
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+ *
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+ * Depth-of-field shader with bokeh
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+ * ported from GLSL shader by Martins Upitis
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+ * http://blenderartists.org/forum/showthread.php?237488-GLSL-depth-of-field-with-bokeh-v2-4-(update)
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+ *
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+ * Requires #define RINGS and SAMPLES integers
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+ */
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+
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+import {
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+ Vector2
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+} from "../../../build/three.module.js";
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+
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+
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+
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+var BokehShader = {
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+
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+ uniforms: {
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+
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+ "textureWidth": { value: 1.0 },
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+ "textureHeight": { value: 1.0 },
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+
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+ "focalDepth": { value: 1.0 },
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+ "focalLength": { value: 24.0 },
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+ "fstop": { value: 0.9 },
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+
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+ "tColor": { value: null },
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+ "tDepth": { value: null },
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+
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+ "maxblur": { value: 1.0 },
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+
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+ "showFocus": { value: 0 },
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+ "manualdof": { value: 0 },
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+ "vignetting": { value: 0 },
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+ "depthblur": { value: 0 },
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+
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+ "threshold": { value: 0.5 },
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+ "gain": { value: 2.0 },
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+ "bias": { value: 0.5 },
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+ "fringe": { value: 0.7 },
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+
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+ "znear": { value: 0.1 },
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+ "zfar": { value: 100 },
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+
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+ "noise": { value: 1 },
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+ "dithering": { value: 0.0001 },
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+ "pentagon": { value: 0 },
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+
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+ "shaderFocus": { value: 1 },
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+ "focusCoords": { value: new Vector2() }
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+
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+
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+ },
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+
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+ vertexShader: [
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+
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+ "varying vec2 vUv;",
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+
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+ "void main() {",
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+
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+ "vUv = uv;",
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+ "gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
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+
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+ "}"
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+
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+ ].join( "\n" ),
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+
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+ fragmentShader: [
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+
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+ "#include <common>",
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+
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+ "varying vec2 vUv;",
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+
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+ "uniform sampler2D tColor;",
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+ "uniform sampler2D tDepth;",
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+ "uniform float textureWidth;",
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+ "uniform float textureHeight;",
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+
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+ "uniform float focalDepth; //focal distance value in meters, but you may use autofocus option below",
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+ "uniform float focalLength; //focal length in mm",
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+ "uniform float fstop; //f-stop value",
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+ "uniform bool showFocus; //show debug focus point and focal range (red = focal point, green = focal range)",
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+
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+ "/*",
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+ "make sure that these two values are the same for your camera, otherwise distances will be wrong.",
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+ "*/",
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+
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+ "uniform float znear; // camera clipping start",
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+ "uniform float zfar; // camera clipping end",
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+
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+ "//------------------------------------------",
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+ "//user variables",
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+
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+ "const int samples = SAMPLES; //samples on the first ring",
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+ "const int rings = RINGS; //ring count",
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+
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+ "const int maxringsamples = rings * samples;",
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+
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+ "uniform bool manualdof; // manual dof calculation",
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+ "float ndofstart = 1.0; // near dof blur start",
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+ "float ndofdist = 2.0; // near dof blur falloff distance",
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+ "float fdofstart = 1.0; // far dof blur start",
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+ "float fdofdist = 3.0; // far dof blur falloff distance",
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+
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+ "float CoC = 0.03; //circle of confusion size in mm (35mm film = 0.03mm)",
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+
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+ "uniform bool vignetting; // use optical lens vignetting",
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+
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+ "float vignout = 1.3; // vignetting outer border",
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+ "float vignin = 0.0; // vignetting inner border",
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+ "float vignfade = 22.0; // f-stops till vignete fades",
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+
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+ "uniform bool shaderFocus;",
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+ "// disable if you use external focalDepth value",
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+
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+ "uniform vec2 focusCoords;",
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+ "// autofocus point on screen (0.0,0.0 - left lower corner, 1.0,1.0 - upper right)",
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+ "// if center of screen use vec2(0.5, 0.5);",
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+
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+ "uniform float maxblur;",
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+ "//clamp value of max blur (0.0 = no blur, 1.0 default)",
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+
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+ "uniform float threshold; // highlight threshold;",
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+ "uniform float gain; // highlight gain;",
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+
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+ "uniform float bias; // bokeh edge bias",
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+ "uniform float fringe; // bokeh chromatic aberration / fringing",
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+
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+ "uniform bool noise; //use noise instead of pattern for sample dithering",
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+
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+ "uniform float dithering;",
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+
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+ "uniform bool depthblur; // blur the depth buffer",
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+ "float dbsize = 1.25; // depth blur size",
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+
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+ "/*",
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+ "next part is experimental",
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+ "not looking good with small sample and ring count",
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+ "looks okay starting from samples = 4, rings = 4",
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+ "*/",
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+
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+ "uniform bool pentagon; //use pentagon as bokeh shape?",
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+ "float feather = 0.4; //pentagon shape feather",
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+
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+ "//------------------------------------------",
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+
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+ "float penta(vec2 coords) {",
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+ "//pentagonal shape",
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+ "float scale = float(rings) - 1.3;",
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+ "vec4 HS0 = vec4( 1.0, 0.0, 0.0, 1.0);",
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+ "vec4 HS1 = vec4( 0.309016994, 0.951056516, 0.0, 1.0);",
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+ "vec4 HS2 = vec4(-0.809016994, 0.587785252, 0.0, 1.0);",
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+ "vec4 HS3 = vec4(-0.809016994,-0.587785252, 0.0, 1.0);",
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+ "vec4 HS4 = vec4( 0.309016994,-0.951056516, 0.0, 1.0);",
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+ "vec4 HS5 = vec4( 0.0 ,0.0 , 1.0, 1.0);",
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+
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+ "vec4 one = vec4( 1.0 );",
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+
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+ "vec4 P = vec4((coords),vec2(scale, scale));",
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+
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+ "vec4 dist = vec4(0.0);",
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+ "float inorout = -4.0;",
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+
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+ "dist.x = dot( P, HS0 );",
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+ "dist.y = dot( P, HS1 );",
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+ "dist.z = dot( P, HS2 );",
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+ "dist.w = dot( P, HS3 );",
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+
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+ "dist = smoothstep( -feather, feather, dist );",
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+
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+ "inorout += dot( dist, one );",
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+
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+ "dist.x = dot( P, HS4 );",
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+ "dist.y = HS5.w - abs( P.z );",
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+
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+ "dist = smoothstep( -feather, feather, dist );",
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+ "inorout += dist.x;",
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+
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+ "return clamp( inorout, 0.0, 1.0 );",
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+ "}",
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+
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+ "float bdepth(vec2 coords) {",
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+ "// Depth buffer blur",
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+ "float d = 0.0;",
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+ "float kernel[9];",
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+ "vec2 offset[9];",
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+
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+ "vec2 wh = vec2(1.0/textureWidth,1.0/textureHeight) * dbsize;",
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+
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+ "offset[0] = vec2(-wh.x,-wh.y);",
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+ "offset[1] = vec2( 0.0, -wh.y);",
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+ "offset[2] = vec2( wh.x -wh.y);",
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+
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+ "offset[3] = vec2(-wh.x, 0.0);",
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+ "offset[4] = vec2( 0.0, 0.0);",
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+ "offset[5] = vec2( wh.x, 0.0);",
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+
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+ "offset[6] = vec2(-wh.x, wh.y);",
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+ "offset[7] = vec2( 0.0, wh.y);",
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+ "offset[8] = vec2( wh.x, wh.y);",
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+
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+ "kernel[0] = 1.0/16.0; kernel[1] = 2.0/16.0; kernel[2] = 1.0/16.0;",
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+ "kernel[3] = 2.0/16.0; kernel[4] = 4.0/16.0; kernel[5] = 2.0/16.0;",
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+ "kernel[6] = 1.0/16.0; kernel[7] = 2.0/16.0; kernel[8] = 1.0/16.0;",
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+
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+
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+ "for( int i=0; i<9; i++ ) {",
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+ "float tmp = texture2D(tDepth, coords + offset[i]).r;",
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+ "d += tmp * kernel[i];",
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+ "}",
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+
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+ "return d;",
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+ "}",
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+
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+
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+ "vec3 color(vec2 coords,float blur) {",
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+ "//processing the sample",
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+
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+ "vec3 col = vec3(0.0);",
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+ "vec2 texel = vec2(1.0/textureWidth,1.0/textureHeight);",
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+
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+ "col.r = texture2D(tColor,coords + vec2(0.0,1.0)*texel*fringe*blur).r;",
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+ "col.g = texture2D(tColor,coords + vec2(-0.866,-0.5)*texel*fringe*blur).g;",
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+ "col.b = texture2D(tColor,coords + vec2(0.866,-0.5)*texel*fringe*blur).b;",
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+
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+ "vec3 lumcoeff = vec3(0.299,0.587,0.114);",
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+ "float lum = dot(col.rgb, lumcoeff);",
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+ "float thresh = max((lum-threshold)*gain, 0.0);",
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+ "return col+mix(vec3(0.0),col,thresh*blur);",
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+ "}",
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+
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+ "vec3 debugFocus(vec3 col, float blur, float depth) {",
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+ "float edge = 0.002*depth; //distance based edge smoothing",
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+ "float m = clamp(smoothstep(0.0,edge,blur),0.0,1.0);",
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+ "float e = clamp(smoothstep(1.0-edge,1.0,blur),0.0,1.0);",
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+
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+ "col = mix(col,vec3(1.0,0.5,0.0),(1.0-m)*0.6);",
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+ "col = mix(col,vec3(0.0,0.5,1.0),((1.0-e)-(1.0-m))*0.2);",
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+
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+ "return col;",
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+ "}",
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+
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+ "float linearize(float depth) {",
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+ "return -zfar * znear / (depth * (zfar - znear) - zfar);",
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+ "}",
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+
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+
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+ "float vignette() {",
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+ "float dist = distance(vUv.xy, vec2(0.5,0.5));",
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+ "dist = smoothstep(vignout+(fstop/vignfade), vignin+(fstop/vignfade), dist);",
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+ "return clamp(dist,0.0,1.0);",
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+ "}",
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+
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+ "float gather(float i, float j, int ringsamples, inout vec3 col, float w, float h, float blur) {",
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+ "float rings2 = float(rings);",
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+ "float step = PI*2.0 / float(ringsamples);",
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+ "float pw = cos(j*step)*i;",
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+ "float ph = sin(j*step)*i;",
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+ "float p = 1.0;",
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+ "if (pentagon) {",
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+ "p = penta(vec2(pw,ph));",
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+ "}",
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+ "col += color(vUv.xy + vec2(pw*w,ph*h), blur) * mix(1.0, i/rings2, bias) * p;",
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+ "return 1.0 * mix(1.0, i /rings2, bias) * p;",
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+ "}",
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+
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+ "void main() {",
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+ "//scene depth calculation",
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+
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+ "float depth = linearize(texture2D(tDepth,vUv.xy).x);",
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+
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+ "// Blur depth?",
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+ "if ( depthblur ) {",
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+ "depth = linearize(bdepth(vUv.xy));",
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+ "}",
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+
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+ "//focal plane calculation",
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+
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+ "float fDepth = focalDepth;",
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+
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+ "if (shaderFocus) {",
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+
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+ "fDepth = linearize(texture2D(tDepth,focusCoords).x);",
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+
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+ "}",
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+
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+ "// dof blur factor calculation",
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+
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+ "float blur = 0.0;",
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+
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+ "if (manualdof) {",
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+ "float a = depth-fDepth; // Focal plane",
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+ "float b = (a-fdofstart)/fdofdist; // Far DoF",
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+ "float c = (-a-ndofstart)/ndofdist; // Near Dof",
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+ "blur = (a>0.0) ? b : c;",
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+ "} else {",
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+ "float f = focalLength; // focal length in mm",
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+ "float d = fDepth*1000.0; // focal plane in mm",
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+ "float o = depth*1000.0; // depth in mm",
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+
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+ "float a = (o*f)/(o-f);",
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+ "float b = (d*f)/(d-f);",
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+ "float c = (d-f)/(d*fstop*CoC);",
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+
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+ "blur = abs(a-b)*c;",
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+ "}",
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+
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+ "blur = clamp(blur,0.0,1.0);",
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+
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+ "// calculation of pattern for dithering",
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+
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+ "vec2 noise = vec2(rand(vUv.xy), rand( vUv.xy + vec2( 0.4, 0.6 ) ) )*dithering*blur;",
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+
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+ "// getting blur x and y step factor",
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+
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+ "float w = (1.0/textureWidth)*blur*maxblur+noise.x;",
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+ "float h = (1.0/textureHeight)*blur*maxblur+noise.y;",
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+
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+ "// calculation of final color",
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+
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+ "vec3 col = vec3(0.0);",
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+
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+ "if(blur < 0.05) {",
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+ "//some optimization thingy",
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+ "col = texture2D(tColor, vUv.xy).rgb;",
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+ "} else {",
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+ "col = texture2D(tColor, vUv.xy).rgb;",
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+ "float s = 1.0;",
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+ "int ringsamples;",
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+
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+ "for (int i = 1; i <= rings; i++) {",
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+ "/*unboxstart*/",
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+ "ringsamples = i * samples;",
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+
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+ "for (int j = 0 ; j < maxringsamples ; j++) {",
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+ "if (j >= ringsamples) break;",
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+ "s += gather(float(i), float(j), ringsamples, col, w, h, blur);",
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+ "}",
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+ "/*unboxend*/",
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+ "}",
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+
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+ "col /= s; //divide by sample count",
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+ "}",
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+
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+ "if (showFocus) {",
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+ "col = debugFocus(col, blur, depth);",
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+ "}",
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+
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+ "if (vignetting) {",
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+ "col *= vignette();",
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+ "}",
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+
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+ "gl_FragColor.rgb = col;",
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+ "gl_FragColor.a = 1.0;",
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+ "} "
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+
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+ ].join( "\n" )
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+
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+};
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+
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+var BokehDepthShader = {
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+
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+ uniforms: {
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+
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+ "mNear": { value: 1.0 },
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+ "mFar": { value: 1000.0 },
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+
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+ },
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+
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+ vertexShader: [
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+
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+ "varying float vViewZDepth;",
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+
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+ "void main() {",
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+
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+ " #include <begin_vertex>",
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+ " #include <project_vertex>",
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+
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+ " vViewZDepth = - mvPosition.z;",
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+
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+ "}"
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+
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+ ].join( "\n" ),
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+
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+ fragmentShader: [
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+
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+ "uniform float mNear;",
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+ "uniform float mFar;",
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+
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+ "varying float vViewZDepth;",
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+
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+ "void main() {",
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+
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+ " float color = 1.0 - smoothstep( mNear, mFar, vViewZDepth );",
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+ " gl_FragColor = vec4( vec3( color ), 1.0 );",
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+
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+ "} "
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+
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+ ].join( "\n" )
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+
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+};
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+
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+export { BokehShader, BokehDepthShader };
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Michael Herzog