/**
 * Copyright (c) 2019-2021 mol* contributors, licensed under MIT, See LICENSE file for more info.
 *
 * @author Alexander Rose <alexander.rose@weirdbyte.de>
 */
export declare const text_frag = "\nprecision highp float;\nprecision highp int;\n\n#include common\n#include common_frag_params\n#include color_frag_params\n#include common_clip\n\nuniform sampler2D tFont;\n\nuniform vec3 uBorderColor;\nuniform float uBorderWidth;\nuniform vec3 uBackgroundColor;\nuniform float uBackgroundOpacity;\n\nvarying vec2 vTexCoord;\n\nconst float smoothness = 32.0;\nconst float gamma = 2.2;\n\nvoid main2(){\n    gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);\n}\n\nvoid main(){\n    #include clip_pixel\n\n    float fragmentDepth = gl_FragCoord.z;\n    bool interior = false;\n    #include assign_material_color\n\n    if (vTexCoord.x > 1.0) {\n        gl_FragColor = vec4(uBackgroundColor, uBackgroundOpacity * material.a);\n    } else {\n        // retrieve signed distance\n        float sdf = texture2D(tFont, vTexCoord).a + uBorderWidth;\n\n        // perform adaptive anti-aliasing of the edges\n        float w = clamp(smoothness * (abs(dFdx(vTexCoord.x)) + abs(dFdy(vTexCoord.y))), 0.0, 0.5);\n        float a = smoothstep(0.5 - w, 0.5 + w, sdf);\n\n        // gamma correction for linear attenuation\n        a = pow(a, 1.0 / gamma);\n\n        if (a < 0.5) discard;\n        material.a *= a;\n\n        // add border\n        float t = 0.5 + uBorderWidth;\n        if (uBorderWidth > 0.0 && sdf < t) {\n            material.xyz = mix(uBorderColor, material.xyz, smoothstep(t - w, t, sdf));\n        }\n\n        gl_FragColor = material;\n    }\n\n    #if defined(dRenderVariant_pick)\n        #include check_picking_alpha\n    #elif defined(dRenderVariant_depth)\n        gl_FragColor = material;\n    #elif defined(dRenderVariant_marking)\n        gl_FragColor = material;\n    #elif defined(dRenderVariant_color)\n        #include apply_marker_color\n        #include apply_fog\n        #include wboit_write\n    #endif\n}\n";