export const wgslFragment: "\nstruct BlendUniforms {\n\tuBlendMode : f32,\n};\n@group(3) @binding(0) var<uniform> fx : BlendUniforms;\n@group(3) @binding(1) var backdrop : texture_2d<f32>;\n@group(3) @binding(2) var backdrop_sampler : sampler;\n\n// HardLight(Cb, Cs) \u2014 also the kernel for Overlay, which the W3C spec\n// defines as HardLight with the arguments swapped\nfn ME_hardLight(b : vec3f, s : vec3f) -> vec3f {\n\tlet lo = 2.0 * b * s;\n\tlet hi = 1.0 - 2.0 * (1.0 - b) * (1.0 - s);\n\treturn mix(lo, hi, step(vec3f(0.5), s));\n}\n\nfn ME_softLight(b : vec3f, s : vec3f) -> vec3f {\n\tlet d = mix(((16.0 * b - 12.0) * b + 4.0) * b, sqrt(b), step(vec3f(0.25), b));\n\tlet lo = b - (1.0 - 2.0 * s) * b * (1.0 - b);\n\tlet hi = b + (2.0 * s - 1.0) * (d - b);\n\treturn mix(lo, hi, step(vec3f(0.5), s));\n}\n\n// Cb == 0 wins over Cs == 1, so it is applied last\nfn ME_colorDodge(b : vec3f, s : vec3f) -> vec3f {\n\tvar r = min(vec3f(1.0), b / max(1.0 - s, vec3f(1e-4)));\n\tr = mix(r, vec3f(1.0), step(vec3f(1.0), s));\n\treturn mix(r, vec3f(0.0), step(b, vec3f(0.0)));\n}\n\n// Cb == 1 wins over Cs == 0, so it is applied last\nfn ME_colorBurn(b : vec3f, s : vec3f) -> vec3f {\n\tvar r = 1.0 - min(vec3f(1.0), (1.0 - b) / max(s, vec3f(1e-4)));\n\tr = mix(r, vec3f(0.0), step(s, vec3f(0.0)));\n\treturn mix(r, vec3f(1.0), step(vec3f(1.0), b));\n}\n\nfn ME_blend(b : vec3f, s : vec3f) -> vec3f {\n\tif (fx.uBlendMode < 0.5) { return abs(b - s); }\n\tif (fx.uBlendMode < 1.5) { return ME_hardLight(s, b); }\n\tif (fx.uBlendMode < 2.5) { return ME_hardLight(b, s); }\n\tif (fx.uBlendMode < 3.5) { return ME_colorDodge(b, s); }\n\tif (fx.uBlendMode < 4.5) { return ME_colorBurn(b, s); }\n\tif (fx.uBlendMode < 5.5) { return ME_softLight(b, s); }\n\tif (fx.uBlendMode < 6.5) { return min(b, s); }\n\treturn max(b, s);\n}\n\nfn apply(color : vec4f, uv : vec2f) -> vec4f {\n\t// sampled BEFORE any branch, so plain textureSampleLevel is safe here\n\tlet Cb = textureSampleLevel(backdrop, backdrop_sampler, screen_uv, 0.0).rgb;\n\tlet a = color.a;\n\tlet Cs = color.rgb / max(a, 1e-4);\n\tlet B = clamp(ME_blend(Cb, Cs), vec3f(0.0), vec3f(1.0));\n\treturn vec4f(a * B, a);\n}\n";
import ShaderEffect from "./shadereffect.js";
//# sourceMappingURL=blendEffect.d.ts.map