declare const _default: "\n    #include \"sampleCatmullRomPS\"\n    #include \"screenDepthPS\"\n\n    var sourceTexture: texture_2d<f32>;\n    var sourceTextureSampler: sampler;\n    var historyTexture: texture_2d<f32>;\n    var historyTextureSampler: sampler;\n    uniform matrix_viewProjectionPrevious: mat4x4f;\n    uniform matrix_viewProjectionInverse: mat4x4f;\n    uniform jitters: vec4f;   // xy: current frame, zw: previous frame\n    uniform textureSize: vec2f;\n\n    varying uv0: vec2f;\n\n    fn reproject(uv_in: vec2f, depth: f32) -> vec2f {\n\n        // uv was Y-flipped by getImageEffectUV for texture sampling,\n        // un-flip to reconstruct correct NDC (viewProj matrices use standard Y convention)\n        var uv = vec2f(uv_in.x, 1.0 - uv_in.y);\n\n        var ndc = vec4f(uv * 2.0 - 1.0, depth, 1.0);\n\n        // remove jitter from the current frame\n        ndc = vec4f(ndc.xy - uniform.jitters.xy, ndc.zw);\n\n        // Transform NDC to world space of the current frame\n        var worldPosition = uniform.matrix_viewProjectionInverse * ndc;\n        worldPosition = worldPosition / worldPosition.w;\n\n        // world position to screen space of the previous frame\n        let screenPrevious = uniform.matrix_viewProjectionPrevious * worldPosition;\n\n        // flip result back to texture sampling convention\n        var result = (screenPrevious.xy / screenPrevious.w) * 0.5 + 0.5;\n        result.y = 1.0 - result.y;\n\n        return result;\n    }\n\n    fn colorClampPremul(uv: vec2f, historyPremul: vec3f) -> vec3f {\n\n        var minPremul = vec3f(9999.0);\n        var maxPremul = vec3f(-9999.0);\n\n        // 3x3 neighborhood in premultiplied space \u2014 same domain as the temporal mix (see fragmentMain).\n        for (var ix: i32 = -1; ix <= 1; ix = ix + 1) {\n            for (var iy: i32 = -1; iy <= 1; iy = iy + 1) {\n                let s = textureSample(sourceTexture, sourceTextureSampler, uv + vec2f(f32(ix), f32(iy)) / uniform.textureSize);\n                let premul = s.rgb * s.a;\n                minPremul = min(minPremul, premul);\n                maxPremul = max(maxPremul, premul);\n            }\n        }\n\n        return clamp(historyPremul, minPremul, maxPremul);\n    }\n\n    @fragment\n    fn fragmentMain(input: FragmentInput) -> FragmentOutput {\n        var output: FragmentOutput;\n\n        // current frame\n        let srcColor = textureSample(sourceTexture, sourceTextureSampler, uv0);\n\n        // current depth is in linear space, convert it to non-linear space\n        let linearDepth = getLinearScreenDepth(uv0);\n        let depth = delinearizeDepth(linearDepth);\n\n        // previous frame\n        let historyUv = reproject(uv0, depth);\n\n        #ifdef QUALITY_HIGH\n\n            var historySample: vec4f = SampleTextureCatmullRom(historyTexture, historyTextureSampler, historyUv, uniform.textureSize);\n\n        #else\n\n            var historySample: vec4f = textureSample(historyTexture, historyTextureSampler, historyUv);\n\n        #endif\n\n        // Premultiplied (rgb * a) is the coverage-correct space for TAA: straight RGB interpolates\n        // uncorrelated color and opacity at edges, which causes colored fringes and alpha-related\n        // ghosting when history is blended or clamped against a 3x3 neighborhood. We clamp and mix\n        // in premultiplied space, then un-premultiply once using the current frame's alpha only\n        // (alpha is not temporally filtered \u2014 output stays tied to this frame's coverage).\n        let historyPremul = historySample.rgb * historySample.a;\n        let srcPremul = srcColor.rgb * srcColor.a;\n\n        let historyPremulClamped = colorClampPremul(uv0, historyPremul);\n\n        let mixFactor_condition = historyUv.x < 0.0 || historyUv.x > 1.0 || historyUv.y < 0.0 || historyUv.y > 1.0;\n        let mixFactor = select(0.05, 1.0, mixFactor_condition);\n\n        let mixedPremul = mix(historyPremulClamped, srcPremul, mixFactor);\n        let a = srcColor.a;\n        // UNORM8 alpha step \u2014 avoid un-premul in the lowest band (quantization / noise).\n        let UNPREMUL_EPS = 1.0 / 255.0;\n        let rgbStraight = select(srcColor.rgb, mixedPremul / a, a > UNPREMUL_EPS);\n        output.color = vec4f(rgbStraight, a);\n        return output;\n    }\n";
export default _default;