export type SepiaProps = {
    amount?: number;
};
export type SepiaUniforms = SepiaProps;
/**
 * @filter         Sepia
 * @description    Gives the image a reddish-brown monochrome tint that imitates an old photograph.
 * @param amount   0 to 1 (0 for no effect, 1 for full sepia coloring)
 */
export declare const sepia: {
    readonly props: SepiaProps;
    readonly uniforms: SepiaUniforms;
    readonly name: "sepia";
    readonly uniformTypes: {
        readonly amount: "f32";
    };
    readonly propTypes: {
        readonly amount: {
            readonly value: 0.5;
            readonly min: 0;
            readonly max: 1;
        };
    };
    readonly fs: "uniform sepiaUniforms {\n  float amount;\n} sepia;\n\nvec4 sepia_filterColor(vec4 color) {\n  float r = color.r;\n  float g = color.g;\n  float b = color.b;\n\n  color.r =\n    min(1.0, (r * (1.0 - (0.607 * sepia.amount))) + (g * (0.769 * sepia.amount)) + (b * (0.189 * sepia.amount)));\n  color.g = min(1.0, (r * 0.349 * sepia.amount) + (g * (1.0 - (0.314 * sepia.amount))) + (b * 0.168 * sepia.amount));\n  color.b = min(1.0, (r * 0.272 * sepia.amount) + (g * 0.534 * sepia.amount) + (b * (1.0 - (0.869 * sepia.amount))));\n\n  return color;\n}\n\nvec4 sepia_filterColor_ext(vec4 color, vec2 texSize, vec2 texCoord) {\n  return sepia_filterColor(color);\n}\n";
    readonly source: "struct sepiaUniforms {\n  amount: f32\n};\n\n@group(0) @binding(1) var<uniform> sepia: sepiaUniforms;\n\nfn sepia_filterColor(color: vec4f) -> vec4f {\n  let r: f32 = color.r;\n  let g: f32 = color.g;\n  let b: f32 = color.b;\n\n  color.r =\n    min(1.0, (r * (1.0 - (0.607 * sepia.amount))) + (g * (0.769 * sepia.amount)) + (b * (0.189 * sepia.amount)));\n  color.g = min(1.0, (r * 0.349 * sepia.amount) + (g * (1.0 - (0.314 * sepia.amount))) + (b * 0.168 * sepia.amount));\n  color.b = min(1.0, (r * 0.272 * sepia.amount) + (g * 0.534 * sepia.amount) + (b * (1.0 - (0.869 * sepia.amount))));\n\n  return color;\n}\n\nvec4 sepia_filterColor_ext(vec4 color, vec2 texSize, vec2 texCoord) {\n  return sepia_filterColor(color);\n}\n";
    readonly passes: [{
        readonly filter: true;
    }];
};
//# sourceMappingURL=sepia.d.ts.map