fabric
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Object model for HTML5 canvas, and SVG-to-canvas parser. Backed by jsdom and node-canvas.
15 lines (13 loc) • 429 B
JavaScript
const fragmentSource = `
precision highp float;
uniform sampler2D uTexture;
uniform float uContrast;
varying vec2 vTexCoord;
void main() {
vec4 color = texture2D(uTexture, vTexCoord);
float contrastF = 1.015 * (uContrast + 1.0) / (1.0 * (1.015 - uContrast));
color.rgb = contrastF * (color.rgb - 0.5) + 0.5;
gl_FragColor = color;
}`;
export { fragmentSource };
//# sourceMappingURL=constrast.mjs.map