ce4c83ff
 wxy
初始提交
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var utils = require('../utils')
, nodes = require('../nodes')
, Image = require('./image');
/**
* Return the width and height of the given `img` path.
*
* Examples:
*
* image-size('foo.png')
* // => 200px 100px
*
* image-size('foo.png')[0]
* // => 200px
*
* image-size('foo.png')[1]
* // => 100px
*
* Can be used to test if the image exists,
* using an optional argument set to `true`
* (without this argument this function throws error
* if there is no such image).
*
* Example:
*
* image-size('nosuchimage.png', true)[0]
* // => 0
*
* @param {String} img
* @param {Boolean} ignoreErr
* @return {Expression}
* @api public
*/
module.exports = function imageSize(img, ignoreErr) {
utils.assertType(img, 'string', 'img');
try {
var img = new Image(this, img.string);
} catch (err) {
if (ignoreErr) {
return [new nodes.Unit(0), new nodes.Unit(0)];
} else {
throw err;
}
}
// Read size
img.open();
var size = img.size();
img.close();
// Return (w h)
var expr = [];
expr.push(new nodes.Unit(size[0], 'px'));
expr.push(new nodes.Unit(size[1], 'px'));
return expr;
};
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