declare const _default: "\n    #ifdef CAS\n        uniform sharpness: f32;\n\n        // reversible LDR <-> HDR tone mapping, as CAS needs LDR input\n        #ifdef CAS_HDR\n            fn maxComponent(x: f32, y: f32, z: f32) -> f32 { return max(x, max(y, z)); }\n            fn toSDR(c: vec3f) -> vec3f { return c / (1.0 + maxComponent(c.r, c.g, c.b)); }\n            fn toHDR(c: vec3f) -> vec3f { return c / max(1.0 - maxComponent(c.r, c.g, c.b), 1e-4); }\n        #else\n            fn toSDR(c: vec3f) -> vec3f { return c; }\n            fn toHDR(c: vec3f) -> vec3f { return c; }\n        #endif\n\n        fn applyCas(color: vec3f, uv: vec2f, sharpness: f32) -> vec3f {\n            let x = uniform.sceneTextureInvRes.x;\n            let y = uniform.sceneTextureInvRes.y;\n\n            // sample 4 neighbors around the already sampled pixel, and convert it to SDR\n            let a: half3 = half3(toSDR(textureSampleLevel(sceneTexture, sceneTextureSampler, uv + vec2f(0.0, -y), 0.0).rgb));\n            let b: half3 = half3(toSDR(textureSampleLevel(sceneTexture, sceneTextureSampler, uv + vec2f(-x, 0.0), 0.0).rgb));\n            let c: half3 = half3(toSDR(color.rgb));\n            let d: half3 = half3(toSDR(textureSampleLevel(sceneTexture, sceneTextureSampler, uv + vec2f(x, 0.0), 0.0).rgb));\n            let e: half3 = half3(toSDR(textureSampleLevel(sceneTexture, sceneTextureSampler, uv + vec2f(0.0, y), 0.0).rgb));\n\n            // apply the sharpening\n            let min_g = min(a.g, min(b.g, min(c.g, min(d.g, e.g))));\n            let max_g = max(a.g, max(b.g, max(c.g, max(d.g, e.g))));\n            let sharpening_amount = sqrt(min(half(1.0) - max_g, min_g) / max(max_g, half(1e-4)));\n            let w = sharpening_amount * half(sharpness);\n            var res = (w * (a + b + d + e) + c) / (half(4.0) * w + half(1.0));\n\n            // remove negative colors\n            res = max(res, half3(0.0));\n\n            // convert back to HDR\n            return toHDR(vec3f(res));\n        }\n    #endif\n";
export default _default;