mirror of
https://github.com/photonstorm/phaser
synced 2024-12-24 12:03:36 +00:00
50 lines
1.7 KiB
JavaScript
50 lines
1.7 KiB
JavaScript
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module.exports = [
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'#define SHADER_NAME BOKEH_FS',
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'precision mediump float;',
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'#define ITERATIONS 100.0',
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'#define ONEOVER_ITR 1.0 / ITERATIONS',
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'#define PI 3.141596',
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'#define GOLDEN_ANGLE 2.39996323',
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'uniform sampler2D uMainSampler;',
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'uniform vec2 resolution;',
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'uniform float radius;',
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'uniform float amount;',
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'uniform float contrast;',
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'uniform bool isTiltShift;',
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'uniform float strength;',
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'uniform vec2 blur;',
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'varying vec2 outTexCoord;',
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'vec2 Sample (in float theta, inout float r)',
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'{',
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' r += 1.0 / r;',
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' return (r - 1.0) * vec2(cos(theta), sin(theta)) * 0.06;',
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'}',
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'vec3 Bokeh (sampler2D tex, vec2 uv, float radius)',
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'{',
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' vec3 acc = vec3(0.0);',
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' vec3 div = vec3(0.0);',
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' vec2 pixel = vec2(resolution.y / resolution.x, 1.0) * radius * .025;',
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' float r = 1.0;',
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' for (float j = 0.0; j < GOLDEN_ANGLE * ITERATIONS; j += GOLDEN_ANGLE)',
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' {',
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' vec3 col = texture2D(tex, uv + pixel * Sample(j, r)).xyz;',
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' col = contrast > 0.0 ? col * col * (1.0 + contrast) : col;',
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' vec3 bokeh = vec3(0.5) + pow(col, vec3(10.0)) * amount;',
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' acc += col * bokeh;',
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' div += bokeh;',
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' }',
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' return acc / div;',
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'}',
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'void main ()',
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'{',
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' float shift = 1.0;',
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' if (isTiltShift)',
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' {',
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' vec2 uv = vec2(gl_FragCoord.xy / resolution + vec2(-0.5, -0.5)) * 2.0;',
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' float centerStrength = 1.0;',
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' shift = length(uv * blur * strength) * centerStrength;',
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' }',
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' gl_FragColor = vec4(Bokeh(uMainSampler, outTexCoord * vec2(1.0, 1.0), radius * shift), 0.0);',
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'}',
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].join('\n');
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