93 lines
3 KiB
GLSL
93 lines
3 KiB
GLSL
// DoF with bokeh GLSL shader by Martins Upitis (martinsh) (devlog-martinsh.blogspot.com)
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// Creative Commons Attribution 3.0 Unported License
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#include "compiled.inc"
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#include "std/math.glsl"
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// const float compoDOFDistance = 10.0; // Focal distance value in meters
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// const float compoDOFLength = 160.0; // Focal length in mm 18-200
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// const float compoDOFFstop = 128.0; // F-stop value
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const int samples = 6; // Samples on the first ring
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const int rings = 6; // Ring count
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const vec2 focus = vec2(0.5, 0.5);
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const float coc = 0.11; // Circle of confusion size in mm (35mm film = 0.03mm)
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const float maxblur = 1.0;
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const float threshold = 0.5; // Highlight threshold
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const float gain = 2.0; // Highlight gain
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const float bias = 0.5; // Bokeh edge bias
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const float fringe = 0.7; // Bokeh chromatic aberration/fringing
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const float namount = 0.0001; // Dither amount
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vec3 color(vec2 coords, const float blur, const sampler2D tex, const vec2 texStep) {
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vec3 col = vec3(0.0);
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col.r = textureLod(tex, coords + vec2(0.0, 1.0) * texStep * fringe * blur, 0.0).r;
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col.g = textureLod(tex, coords + vec2(-0.866, -0.5) * texStep * fringe * blur, 0.0).g;
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col.b = textureLod(tex, coords + vec2(0.866, -0.5) * texStep * fringe * blur, 0.0).b;
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const 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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vec3 dof(
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const vec2 texCoord,
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const float gdepth,
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const sampler2D tex,
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const sampler2D gbufferD,
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const vec2 texStep,
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const vec2 cameraProj,
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const bool autoFocus,
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const float DOFDistance,
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const float DOFLength,
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const float DOFFStop) {
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float depth = linearize(gdepth, cameraProj);
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float fDepth = 0.0;
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if(autoFocus) {
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fDepth = linearize(textureLod(gbufferD, focus, 0.0).r * 2.0 - 1.0, cameraProj);
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} else {
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fDepth = DOFDistance;
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}
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float f = DOFLength; // 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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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 * DOFFStop * coc);
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float blur = abs(a - b) * c;
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blur = clamp(blur, 0.0, 1.0);
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vec2 noise = rand2(texCoord) * namount * blur;
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float w = (texStep.x) * blur * maxblur + noise.x;
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float h = (texStep.y) * blur * maxblur + noise.y;
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vec3 col = vec3(0.0);
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if (blur < 0.05) {
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col = textureLod(tex, texCoord, 0.0).rgb;
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}
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else {
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col = textureLod(tex, texCoord, 0.0).rgb;
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float s = 1.0;
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int ringsamples;
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for (int i = 1; i <= rings; ++i) {
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ringsamples = i * samples;
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for (int j = 0 ; j < ringsamples; ++j) {
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float step = PI2 / float(ringsamples);
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float pw = (cos(float(j) * step) * float(i));
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float ph = (sin(float(j) * step) * float(i));
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float p = 1.0;
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// if (pentagon) p = penta(vec2(pw, ph));
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col += color(texCoord + vec2(pw * w, ph * h), blur, tex, texStep) * mix(1.0, (float(i)) / (float(rings)), bias) * p;
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s += 1.0 * mix(1.0, (float(i)) / (float(rings)), bias) * p;
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}
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}
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col /= s;
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}
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return col;
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}
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