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playcanvas

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Open-source WebGL/WebGPU 3D engine for the web

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playcanvas/engine

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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;