ce4c83ff
 wxy
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var utils = require('../utils')
, nodes = require('../nodes');
/**
* Return a `RGBA` from the r,g,b,a channels.
*
* Examples:
*
* rgba(255,0,0,0.5)
* // => rgba(255,0,0,0.5)
*
* rgba(255,0,0,1)
* // => #ff0000
*
* rgba(#ffcc00, 50%)
* // rgba(255,204,0,0.5)
*
* @param {Unit|RGBA|HSLA} red
* @param {Unit} green
* @param {Unit} blue
* @param {Unit} alpha
* @return {RGBA}
* @api public
*/
module.exports = function rgba(red, green, blue, alpha){
switch (arguments.length) {
case 1:
utils.assertColor(red);
return red.rgba;
case 2:
utils.assertColor(red);
var color = red.rgba;
utils.assertType(green, 'unit', 'alpha');
alpha = green.clone();
if ('%' == alpha.type) alpha.val /= 100;
return new nodes.RGBA(
color.r
, color.g
, color.b
, alpha.val);
default:
utils.assertType(red, 'unit', 'red');
utils.assertType(green, 'unit', 'green');
utils.assertType(blue, 'unit', 'blue');
utils.assertType(alpha, 'unit', 'alpha');
var r = '%' == red.type ? Math.round(red.val * 2.55) : red.val
, g = '%' == green.type ? Math.round(green.val * 2.55) : green.val
, b = '%' == blue.type ? Math.round(blue.val * 2.55) : blue.val;
alpha = alpha.clone();
if (alpha && '%' == alpha.type) alpha.val /= 100;
return new nodes.RGBA(
r
, g
, b
, alpha.val);
}
};
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