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Extend: default missing edge props to zero #2578

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Lovell Fuller
2021-03-25 16:34:02 +00:00
parent f1f18fbb4a
commit 6147491d9e
4 changed files with 85 additions and 28 deletions
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57
lib/resize.js
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@@ -302,11 +302,20 @@ function resize (width, height, options) {
* })
* ...
*
* @example
* // Add a row of 10 red pixels to the bottom
* sharp(input)
* .extend({
* bottom: 10,
* background: 'red'
* })
* ...
*
* @param {(number|Object)} extend - single pixel count to add to all edges or an Object with per-edge counts
* @param {number} [extend.top]
* @param {number} [extend.left]
* @param {number} [extend.bottom]
* @param {number} [extend.right]
* @param {number} [extend.top=0]
* @param {number} [extend.left=0]
* @param {number} [extend.bottom=0]
* @param {number} [extend.right=0]
* @param {String|Object} [extend.background={r: 0, g: 0, b: 0, alpha: 1}] - background colour, parsed by the [color](https://www.npmjs.org/package/color) module, defaults to black without transparency.
* @returns {Sharp}
* @throws {Error} Invalid parameters
@@ -317,17 +326,35 @@ function extend (extend) {
this.options.extendBottom = extend;
this.options.extendLeft = extend;
this.options.extendRight = extend;
} else if (
is.object(extend) &&
is.integer(extend.top) && extend.top >= 0 &&
is.integer(extend.bottom) && extend.bottom >= 0 &&
is.integer(extend.left) && extend.left >= 0 &&
is.integer(extend.right) && extend.right >= 0
) {
this.options.extendTop = extend.top;
this.options.extendBottom = extend.bottom;
this.options.extendLeft = extend.left;
this.options.extendRight = extend.right;
} else if (is.object(extend)) {
if (is.defined(extend.top)) {
if (is.integer(extend.top) && extend.top >= 0) {
this.options.extendTop = extend.top;
} else {
throw is.invalidParameterError('top', 'positive integer', extend.top);
}
}
if (is.defined(extend.bottom)) {
if (is.integer(extend.bottom) && extend.bottom >= 0) {
this.options.extendBottom = extend.bottom;
} else {
throw is.invalidParameterError('bottom', 'positive integer', extend.bottom);
}
}
if (is.defined(extend.left)) {
if (is.integer(extend.left) && extend.left >= 0) {
this.options.extendLeft = extend.left;
} else {
throw is.invalidParameterError('left', 'positive integer', extend.left);
}
}
if (is.defined(extend.right)) {
if (is.integer(extend.right) && extend.right >= 0) {
this.options.extendRight = extend.right;
} else {
throw is.invalidParameterError('right', 'positive integer', extend.right);
}
}
this._setBackgroundColourOption('extendBackground', extend.background);
} else {
throw is.invalidParameterError('extend', 'integer or object', extend);