44 lines
1.3 KiB
JavaScript
44 lines
1.3 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: !0 });
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var msdfFrag = `// Pixi texture info\r
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varying vec2 vTextureCoord;\r
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uniform sampler2D uSampler;\r
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\r
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// Tint\r
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uniform vec4 uColor;\r
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\r
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// on 2D applications fwidth is screenScale / glyphAtlasScale * distanceFieldRange\r
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uniform float uFWidth;\r
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\r
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void main(void) {\r
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\r
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// To stack MSDF and SDF we need a non-pre-multiplied-alpha texture.\r
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vec4 texColor = texture2D(uSampler, vTextureCoord);\r
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\r
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// MSDF\r
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float median = texColor.r + texColor.g + texColor.b -\r
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min(texColor.r, min(texColor.g, texColor.b)) -\r
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max(texColor.r, max(texColor.g, texColor.b));\r
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// SDF\r
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median = min(median, texColor.a);\r
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\r
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float screenPxDistance = uFWidth * (median - 0.5);\r
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float alpha = clamp(screenPxDistance + 0.5, 0.0, 1.0);\r
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if (median < 0.01) {\r
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alpha = 0.0;\r
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} else if (median > 0.99) {\r
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alpha = 1.0;\r
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}\r
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\r
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// Gamma correction for coverage-like alpha\r
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float luma = dot(uColor.rgb, vec3(0.299, 0.587, 0.114));\r
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float gamma = mix(1.0, 1.0 / 2.2, luma);\r
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float coverage = pow(uColor.a * alpha, gamma); \r
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\r
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// NPM Textures, NPM outputs\r
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gl_FragColor = vec4(uColor.rgb, coverage);\r
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}\r
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`;
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exports.default = msdfFrag;
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//# sourceMappingURL=msdf.frag.js.map
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