43 lines
1.4 KiB
JavaScript
43 lines
1.4 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule processColor
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*/
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'use strict';
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var tinycolor = require('tinycolor');
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var Platform = require('Platform');
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/* eslint no-bitwise: 0 */
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function processColor(color) {
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if (!color || typeof color === 'number') {
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return color;
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} else if (color instanceof Array) {
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return color.map(processColor);
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} else {
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var color = tinycolor(color);
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if (color.isValid()) {
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var rgb = color.toRgb();
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// All bitwise operations happen on 32-bit numbers, so we shift the 1 first
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// then multiply it with the actual value.
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var colorInt = Math.round(rgb.a * 255) * (1 << 24) + rgb.r * (1 << 16) + rgb.g * (1 << 8) + rgb.b;
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if (Platform.OS === 'android') {
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// Android use 32 bit *signed* integer to represent the color
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// We utilize the fact that bitwise operations in JS also operates on
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// signed 32 bit integers, so that we can use those to convert from
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// *unsiged* to *signed* 32bit int that way.
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colorInt = colorInt | 0x0;
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}
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return colorInt;
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}
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return 0;
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}
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}
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module.exports = processColor;
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