# all files / src/shader/source/compositor/ dof.glsl.js

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     export default "@export clay.compositor.dof.coc\nuniform sampler2D depth;\nuniform float zNear: 0.1;\nuniform float zFar: 2000;\nuniform float focalDist: 3;\nuniform float focalRange: 1;\nuniform float focalLength: 30;\nuniform float fstop: 2.8;\nvarying vec2 v_Texcoord;\n@import clay.util.encode_float\nvoid main()\n{\n    float z = texture2D(depth, v_Texcoord).r * 2.0 - 1.0;\n    float dist = 2.0 * zNear * zFar / (zFar + zNear - z * (zFar - zNear));\n    float aperture = focalLength / fstop;\n    float coc;\n    float uppper = focalDist + focalRange;\n    float lower = focalDist - focalRange;\n    if (dist <= uppper && dist >= lower) {\n        coc = 0.5;\n    }\n    else {\n        float focalAdjusted = dist > uppper ? uppper : lower;\n        coc = abs(aperture * (focalLength * (dist - focalAdjusted)) / (dist * (focalAdjusted - focalLength)));\n        coc = clamp(coc, 0.0, 0.4) / 0.4000001;\n        if (dist < lower) {\n            coc = -coc;\n        }\n        coc = coc * 0.5 + 0.5;\n    }\n    gl_FragColor = encodeFloat(coc);\n}\n@end\n@export clay.compositor.dof.premultiply\nuniform sampler2D texture;\nuniform sampler2D coc;\nvarying vec2 v_Texcoord;\n@import clay.util.rgbm\n@import clay.util.decode_float\nvoid main() {\n    float fCoc = max(abs(decodeFloat(texture2D(coc, v_Texcoord)) * 2.0 - 1.0), 0.1);\n    gl_FragColor = encodeHDR(\n        vec4(decodeHDR(texture2D(texture, v_Texcoord)).rgb * fCoc, 1.0)\n    );\n}\n@end\n@export clay.compositor.dof.min_coc\nuniform sampler2D coc;\nvarying vec2 v_Texcoord;\nuniform vec2 textureSize : [512.0, 512.0];\n@import clay.util.float\nvoid main()\n{\n    vec4 d = vec4(-1.0, -1.0, 1.0, 1.0) / textureSize.xyxy;\n    float fCoc = decodeFloat(texture2D(coc, v_Texcoord + d.xy));\n    fCoc = min(fCoc, decodeFloat(texture2D(coc, v_Texcoord + d.zy)));\n    fCoc = min(fCoc, decodeFloat(texture2D(coc, v_Texcoord + d.xw)));\n    fCoc = min(fCoc, decodeFloat(texture2D(coc, v_Texcoord + d.zw)));\n    gl_FragColor = encodeFloat(fCoc);\n}\n@end\n@export clay.compositor.dof.max_coc\nuniform sampler2D coc;\nvarying vec2 v_Texcoord;\nuniform vec2 textureSize : [512.0, 512.0];\n@import clay.util.float\nvoid main()\n{\n    vec4 d = vec4(-1.0, -1.0, 1.0, 1.0) / textureSize.xyxy;\n    float fCoc = decodeFloat(texture2D(coc, v_Texcoord + d.xy));\n    fCoc = max(fCoc, decodeFloat(texture2D(coc, v_Texcoord + d.zy)));\n    fCoc = max(fCoc, decodeFloat(texture2D(coc, v_Texcoord + d.xw)));\n    fCoc = max(fCoc, decodeFloat(texture2D(coc, v_Texcoord + d.zw)));\n    gl_FragColor = encodeFloat(fCoc);\n}\n@end\n@export clay.compositor.dof.coc_upsample\n#define HIGH_QUALITY\nuniform sampler2D coc;\nuniform vec2 textureSize : [512, 512];\nuniform float sampleScale: 0.5;\nvarying vec2 v_Texcoord;\n@import clay.util.float\nvoid main()\n{\n#ifdef HIGH_QUALITY\n    vec4 d = vec4(1.0, 1.0, -1.0, 0.0) / textureSize.xyxy * sampleScale;\n    float s;\n    s  = decodeFloat(texture2D(coc, v_Texcoord - d.xy));\n    s += decodeFloat(texture2D(coc, v_Texcoord - d.wy)) * 2.0;\n    s += decodeFloat(texture2D(coc, v_Texcoord - d.zy));\n    s += decodeFloat(texture2D(coc, v_Texcoord + d.zw)) * 2.0;\n    s += decodeFloat(texture2D(coc, v_Texcoord       )) * 4.0;\n    s += decodeFloat(texture2D(coc, v_Texcoord + d.xw)) * 2.0;\n    s += decodeFloat(texture2D(coc, v_Texcoord + d.zy));\n    s += decodeFloat(texture2D(coc, v_Texcoord + d.wy)) * 2.0;\n    s += decodeFloat(texture2D(coc, v_Texcoord + d.xy));\n    gl_FragColor = encodeFloat(s / 16.0);\n#else\n    vec4 d = vec4(-1.0, -1.0, +1.0, +1.0) / textureSize.xyxy;\n    float s;\n    s  = decodeFloat(texture2D(coc, v_Texcoord + d.xy));\n    s += decodeFloat(texture2D(coc, v_Texcoord + d.zy));\n    s += decodeFloat(texture2D(coc, v_Texcoord + d.xw));\n    s += decodeFloat(texture2D(coc, v_Texcoord + d.zw));\n    gl_FragColor = encodeFloat(s / 4.0);\n#endif\n}\n@end\n@export clay.compositor.dof.upsample\n#define HIGH_QUALITY\nuniform sampler2D coc;\nuniform sampler2D texture;\nuniform vec2 textureSize : [512, 512];\nuniform float sampleScale: 0.5;\nvarying vec2 v_Texcoord;\n@import clay.util.rgbm\n@import clay.util.decode_float\nfloat tap(vec2 uv, inout vec4 color, float baseWeight) {\n    float weight = abs(decodeFloat(texture2D(coc, uv)) * 2.0 - 1.0) * baseWeight;\n    color += decodeHDR(texture2D(texture, uv)) * weight;\n    return weight;\n}\nvoid main()\n{\n#ifdef HIGH_QUALITY\n    vec4 d = vec4(1.0, 1.0, -1.0, 0.0) / textureSize.xyxy * sampleScale;\n    vec4 color = vec4(0.0);\n    float baseWeight = 1.0 / 16.0;\n    float w  = tap(v_Texcoord - d.xy, color, baseWeight);\n    w += tap(v_Texcoord - d.wy, color, baseWeight * 2.0);\n    w += tap(v_Texcoord - d.zy, color, baseWeight);\n    w += tap(v_Texcoord + d.zw, color, baseWeight * 2.0);\n    w += tap(v_Texcoord       , color, baseWeight * 4.0);\n    w += tap(v_Texcoord + d.xw, color, baseWeight * 2.0);\n    w += tap(v_Texcoord + d.zy, color, baseWeight);\n    w += tap(v_Texcoord + d.wy, color, baseWeight * 2.0);\n    w += tap(v_Texcoord + d.xy, color, baseWeight);\n    gl_FragColor = encodeHDR(color / w);\n#else\n    vec4 d = vec4(-1.0, -1.0, +1.0, +1.0) / textureSize.xyxy;\n    vec4 color = vec4(0.0);\n    float baseWeight = 1.0 / 4.0;\n    float w  = tap(v_Texcoord + d.xy, color, baseWeight);\n    w += tap(v_Texcoord + d.zy, color, baseWeight);\n    w += tap(v_Texcoord + d.xw, color, baseWeight);\n    w += tap(v_Texcoord + d.zw, color, baseWeight);\n    gl_FragColor = encodeHDR(color / w);\n#endif\n}\n@end\n@export clay.compositor.dof.downsample\nuniform sampler2D texture;\nuniform sampler2D coc;\nuniform vec2 textureSize : [512, 512];\nvarying vec2 v_Texcoord;\n@import clay.util.rgbm\n@import clay.util.decode_float\nfloat tap(vec2 uv, inout vec4 color) {\n    float weight = abs(decodeFloat(texture2D(coc, uv)) * 2.0 - 1.0) * 0.25;\n    color += decodeHDR(texture2D(texture, uv)) * weight;\n    return weight;\n}\nvoid main()\n{\n    vec4 d = vec4(-1.0, -1.0, 1.0, 1.0) / textureSize.xyxy;\n    vec4 color = vec4(0.0);\n    float weight = tap(v_Texcoord + d.xy, color);\n    weight += tap(v_Texcoord + d.zy, color);\n    weight += tap(v_Texcoord + d.xw, color);\n    weight += tap(v_Texcoord + d.zw, color);\n    color /= weight;\n    gl_FragColor = encodeHDR(color);\n}\n@end\n@export clay.compositor.dof.hexagonal_blur_frag\n@import clay.util.float\nvec4 doBlur(sampler2D targetTexture, vec2 offset) {\n#ifdef BLUR_COC\n    float cocSum = 0.0;\n#else\n    vec4 color = vec4(0.0);\n#endif\n    float weightSum = 0.0;\n    float kernelWeight = 1.0 / float(KERNEL_SIZE);\n    for (int i = 0; i < KERNEL_SIZE; i++) {\n        vec2 coord = v_Texcoord + offset * float(i);\n        float w = kernelWeight;\n#ifdef BLUR_COC\n        float fCoc = decodeFloat(texture2D(targetTexture, coord)) * 2.0 - 1.0;\n        cocSum += clamp(fCoc, -1.0, 0.0) * w;\n#else\n        float fCoc = decodeFloat(texture2D(coc, coord)) * 2.0 - 1.0;\n        vec4 texel = texture2D(targetTexture, coord);\n    #if !defined(BLUR_NEARFIELD)\n        w *= abs(fCoc);\n    #endif\n        color += decodeHDR(texel) * w;\n#endif\n        weightSum += w;\n    }\n#ifdef BLUR_COC\n    return encodeFloat(clamp(cocSum / weightSum, -1.0, 0.0) * 0.5 + 0.5);\n#else\n    return color / weightSum;\n#endif\n}\n@end\n@export clay.compositor.dof.hexagonal_blur_1\n#define KERNEL_SIZE 5\nuniform sampler2D texture;\nuniform sampler2D coc;\nvarying vec2 v_Texcoord;\nuniform float blurSize : 1.0;\nuniform vec2 textureSize : [512.0, 512.0];\n@import clay.util.rgbm\n@import clay.compositor.dof.hexagonal_blur_frag\nvoid main()\n{\n    vec2 offset = blurSize / textureSize;\n#if !defined(BLUR_NEARFIELD) && !defined(BLUR_COC)\n    offset *= abs(decodeFloat(texture2D(coc, v_Texcoord)) * 2.0 - 1.0);\n#endif\n    gl_FragColor = doBlur(texture, vec2(0.0, offset.y));\n#if !defined(BLUR_COC)\n    gl_FragColor = encodeHDR(gl_FragColor);\n#endif\n}\n@end\n@export clay.compositor.dof.hexagonal_blur_2\n#define KERNEL_SIZE 5\nuniform sampler2D texture;\nuniform sampler2D coc;\nvarying vec2 v_Texcoord;\nuniform float blurSize : 1.0;\nuniform vec2 textureSize : [512.0, 512.0];\n@import clay.util.rgbm\n@import clay.compositor.dof.hexagonal_blur_frag\nvoid main()\n{\n    vec2 offset = blurSize / textureSize;\n#if !defined(BLUR_NEARFIELD) && !defined(BLUR_COC)\n    offset *= abs(decodeFloat(texture2D(coc, v_Texcoord)) * 2.0 - 1.0);\n#endif\n    offset.y /= 2.0;\n    gl_FragColor = doBlur(texture, -offset);\n#if !defined(BLUR_COC)\n    gl_FragColor = encodeHDR(gl_FragColor);\n#endif\n}\n@end\n@export clay.compositor.dof.hexagonal_blur_3\n#define KERNEL_SIZE 5\nuniform sampler2D texture1;\nuniform sampler2D texture2;\nuniform sampler2D coc;\nvarying vec2 v_Texcoord;\nuniform float blurSize : 1.0;\nuniform vec2 textureSize : [512.0, 512.0];\n@import clay.util.rgbm\n@import clay.compositor.dof.hexagonal_blur_frag\nvoid main()\n{\n    vec2 offset = blurSize / textureSize;\n#if !defined(BLUR_NEARFIELD) && !defined(BLUR_COC)\n    offset *= abs(decodeFloat(texture2D(coc, v_Texcoord)) * 2.0 - 1.0);\n#endif\n    offset.y /= 2.0;\n    vec2 vDownRight = vec2(offset.x, -offset.y);\n    vec4 texel1 = doBlur(texture1, -offset);\n    vec4 texel2 = doBlur(texture1, vDownRight);\n    vec4 texel3 = doBlur(texture2, vDownRight);\n#ifdef BLUR_COC\n    float coc1 = decodeFloat(texel1) * 2.0 - 1.0;\n    float coc2 = decodeFloat(texel2) * 2.0 - 1.0;\n    float coc3 = decodeFloat(texel3) * 2.0 - 1.0;\n    gl_FragColor = encodeFloat(\n        ((coc1 + coc2 + coc3) / 3.0) * 0.5 + 0.5\n    );\n#else\n    vec4 color = (texel1 + texel2 + texel3) / 3.0;\n    gl_FragColor = encodeHDR(color);\n#endif\n}\n@end\n@export clay.compositor.dof.composite\n#define DEBUG 0\nuniform sampler2D original;\nuniform sampler2D blurred;\nuniform sampler2D nearfield;\nuniform sampler2D coc;\nuniform sampler2D nearcoc;\nvarying vec2 v_Texcoord;\n@import clay.util.rgbm\n@import clay.util.float\nvoid main()\n{\n    vec4 blurredColor = decodeHDR(texture2D(blurred, v_Texcoord));\n    vec4 originalColor = decodeHDR(texture2D(original, v_Texcoord));\n    float fCoc = decodeFloat(texture2D(coc, v_Texcoord));\n    fCoc = abs(fCoc * 2.0 - 1.0);\n    float weight = smoothstep(0.0, 1.0, fCoc);\n#ifdef NEARFIELD_ENABLED\n    vec4 nearfieldColor = decodeHDR(texture2D(nearfield, v_Texcoord));\n    float fNearCoc = decodeFloat(texture2D(nearcoc, v_Texcoord));\n    fNearCoc = abs(fNearCoc * 2.0 - 1.0);\n    gl_FragColor = encodeHDR(\n        mix(\n            nearfieldColor, mix(originalColor, blurredColor, weight),\n            pow(1.0 - fNearCoc, 4.0)\n        )\n    );\n#else\n    gl_FragColor = encodeHDR(mix(originalColor, blurredColor, weight));\n#endif\n#if DEBUG == 1\n    gl_FragColor = vec4(vec3(fCoc), 1.0);\n#elif DEBUG == 2\n    gl_FragColor = vec4(vec3(fNearCoc), 1.0);\n#elif DEBUG == 3\n    gl_FragColor = encodeHDR(blurredColor);\n#elif DEBUG == 4\n    gl_FragColor = encodeHDR(nearfieldColor);\n#endif\n}\n@end";