fabric-pure-browser
Version:
Fabric.js package with no node-specific dependencies (node-canvas, jsdom). The project is published once a day (in case if a new version appears) from 'master' branch of https://github.com/fabricjs/fabric.js repository. You can keep original imports in
399 lines (363 loc) • 8.73 kB
JavaScript
(function() {
function normalize(a, c, p, s) {
if (a < Math.abs(c)) {
a = c;
s = p / 4;
}
else {
//handle the 0/0 case:
if (c === 0 && a === 0) {
s = p / (2 * Math.PI) * Math.asin(1);
}
else {
s = p / (2 * Math.PI) * Math.asin(c / a);
}
}
return { a: a, c: c, p: p, s: s };
}
function elastic(opts, t, d) {
return opts.a *
Math.pow(2, 10 * (t -= 1)) *
Math.sin( (t * d - opts.s) * (2 * Math.PI) / opts.p );
}
/**
* Cubic easing out
* @memberOf fabric.util.ease
*/
function easeOutCubic(t, b, c, d) {
return c * ((t = t / d - 1) * t * t + 1) + b;
}
/**
* Cubic easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutCubic(t, b, c, d) {
t /= d / 2;
if (t < 1) {
return c / 2 * t * t * t + b;
}
return c / 2 * ((t -= 2) * t * t + 2) + b;
}
/**
* Quartic easing in
* @memberOf fabric.util.ease
*/
function easeInQuart(t, b, c, d) {
return c * (t /= d) * t * t * t + b;
}
/**
* Quartic easing out
* @memberOf fabric.util.ease
*/
function easeOutQuart(t, b, c, d) {
return -c * ((t = t / d - 1) * t * t * t - 1) + b;
}
/**
* Quartic easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutQuart(t, b, c, d) {
t /= d / 2;
if (t < 1) {
return c / 2 * t * t * t * t + b;
}
return -c / 2 * ((t -= 2) * t * t * t - 2) + b;
}
/**
* Quintic easing in
* @memberOf fabric.util.ease
*/
function easeInQuint(t, b, c, d) {
return c * (t /= d) * t * t * t * t + b;
}
/**
* Quintic easing out
* @memberOf fabric.util.ease
*/
function easeOutQuint(t, b, c, d) {
return c * ((t = t / d - 1) * t * t * t * t + 1) + b;
}
/**
* Quintic easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutQuint(t, b, c, d) {
t /= d / 2;
if (t < 1) {
return c / 2 * t * t * t * t * t + b;
}
return c / 2 * ((t -= 2) * t * t * t * t + 2) + b;
}
/**
* Sinusoidal easing in
* @memberOf fabric.util.ease
*/
function easeInSine(t, b, c, d) {
return -c * Math.cos(t / d * (Math.PI / 2)) + c + b;
}
/**
* Sinusoidal easing out
* @memberOf fabric.util.ease
*/
function easeOutSine(t, b, c, d) {
return c * Math.sin(t / d * (Math.PI / 2)) + b;
}
/**
* Sinusoidal easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutSine(t, b, c, d) {
return -c / 2 * (Math.cos(Math.PI * t / d) - 1) + b;
}
/**
* Exponential easing in
* @memberOf fabric.util.ease
*/
function easeInExpo(t, b, c, d) {
return (t === 0) ? b : c * Math.pow(2, 10 * (t / d - 1)) + b;
}
/**
* Exponential easing out
* @memberOf fabric.util.ease
*/
function easeOutExpo(t, b, c, d) {
return (t === d) ? b + c : c * (-Math.pow(2, -10 * t / d) + 1) + b;
}
/**
* Exponential easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutExpo(t, b, c, d) {
if (t === 0) {
return b;
}
if (t === d) {
return b + c;
}
t /= d / 2;
if (t < 1) {
return c / 2 * Math.pow(2, 10 * (t - 1)) + b;
}
return c / 2 * (-Math.pow(2, -10 * --t) + 2) + b;
}
/**
* Circular easing in
* @memberOf fabric.util.ease
*/
function easeInCirc(t, b, c, d) {
return -c * (Math.sqrt(1 - (t /= d) * t) - 1) + b;
}
/**
* Circular easing out
* @memberOf fabric.util.ease
*/
function easeOutCirc(t, b, c, d) {
return c * Math.sqrt(1 - (t = t / d - 1) * t) + b;
}
/**
* Circular easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutCirc(t, b, c, d) {
t /= d / 2;
if (t < 1) {
return -c / 2 * (Math.sqrt(1 - t * t) - 1) + b;
}
return c / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1) + b;
}
/**
* Elastic easing in
* @memberOf fabric.util.ease
*/
function easeInElastic(t, b, c, d) {
var s = 1.70158, p = 0, a = c;
if (t === 0) {
return b;
}
t /= d;
if (t === 1) {
return b + c;
}
if (!p) {
p = d * 0.3;
}
var opts = normalize(a, c, p, s);
return -elastic(opts, t, d) + b;
}
/**
* Elastic easing out
* @memberOf fabric.util.ease
*/
function easeOutElastic(t, b, c, d) {
var s = 1.70158, p = 0, a = c;
if (t === 0) {
return b;
}
t /= d;
if (t === 1) {
return b + c;
}
if (!p) {
p = d * 0.3;
}
var opts = normalize(a, c, p, s);
return opts.a * Math.pow(2, -10 * t) * Math.sin((t * d - opts.s) * (2 * Math.PI) / opts.p ) + opts.c + b;
}
/**
* Elastic easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutElastic(t, b, c, d) {
var s = 1.70158, p = 0, a = c;
if (t === 0) {
return b;
}
t /= d / 2;
if (t === 2) {
return b + c;
}
if (!p) {
p = d * (0.3 * 1.5);
}
var opts = normalize(a, c, p, s);
if (t < 1) {
return -0.5 * elastic(opts, t, d) + b;
}
return opts.a * Math.pow(2, -10 * (t -= 1)) *
Math.sin((t * d - opts.s) * (2 * Math.PI) / opts.p ) * 0.5 + opts.c + b;
}
/**
* Backwards easing in
* @memberOf fabric.util.ease
*/
function easeInBack(t, b, c, d, s) {
if (s === undefined) {
s = 1.70158;
}
return c * (t /= d) * t * ((s + 1) * t - s) + b;
}
/**
* Backwards easing out
* @memberOf fabric.util.ease
*/
function easeOutBack(t, b, c, d, s) {
if (s === undefined) {
s = 1.70158;
}
return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;
}
/**
* Backwards easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutBack(t, b, c, d, s) {
if (s === undefined) {
s = 1.70158;
}
t /= d / 2;
if (t < 1) {
return c / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b;
}
return c / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b;
}
/**
* Bouncing easing in
* @memberOf fabric.util.ease
*/
function easeInBounce(t, b, c, d) {
return c - easeOutBounce (d - t, 0, c, d) + b;
}
/**
* Bouncing easing out
* @memberOf fabric.util.ease
*/
function easeOutBounce(t, b, c, d) {
if ((t /= d) < (1 / 2.75)) {
return c * (7.5625 * t * t) + b;
}
else if (t < (2 / 2.75)) {
return c * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75) + b;
}
else if (t < (2.5 / 2.75)) {
return c * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375) + b;
}
else {
return c * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375) + b;
}
}
/**
* Bouncing easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutBounce(t, b, c, d) {
if (t < d / 2) {
return easeInBounce (t * 2, 0, c, d) * 0.5 + b;
}
return easeOutBounce(t * 2 - d, 0, c, d) * 0.5 + c * 0.5 + b;
}
/**
* Easing functions
* See <a href="http://gizma.com/easing/">Easing Equations by Robert Penner</a>
* @namespace fabric.util.ease
*/
fabric.util.ease = {
/**
* Quadratic easing in
* @memberOf fabric.util.ease
*/
easeInQuad: function(t, b, c, d) {
return c * (t /= d) * t + b;
},
/**
* Quadratic easing out
* @memberOf fabric.util.ease
*/
easeOutQuad: function(t, b, c, d) {
return -c * (t /= d) * (t - 2) + b;
},
/**
* Quadratic easing in and out
* @memberOf fabric.util.ease
*/
easeInOutQuad: function(t, b, c, d) {
t /= (d / 2);
if (t < 1) {
return c / 2 * t * t + b;
}
return -c / 2 * ((--t) * (t - 2) - 1) + b;
},
/**
* Cubic easing in
* @memberOf fabric.util.ease
*/
easeInCubic: function(t, b, c, d) {
return c * (t /= d) * t * t + b;
},
easeOutCubic: easeOutCubic,
easeInOutCubic: easeInOutCubic,
easeInQuart: easeInQuart,
easeOutQuart: easeOutQuart,
easeInOutQuart: easeInOutQuart,
easeInQuint: easeInQuint,
easeOutQuint: easeOutQuint,
easeInOutQuint: easeInOutQuint,
easeInSine: easeInSine,
easeOutSine: easeOutSine,
easeInOutSine: easeInOutSine,
easeInExpo: easeInExpo,
easeOutExpo: easeOutExpo,
easeInOutExpo: easeInOutExpo,
easeInCirc: easeInCirc,
easeOutCirc: easeOutCirc,
easeInOutCirc: easeInOutCirc,
easeInElastic: easeInElastic,
easeOutElastic: easeOutElastic,
easeInOutElastic: easeInOutElastic,
easeInBack: easeInBack,
easeOutBack: easeOutBack,
easeInOutBack: easeInOutBack,
easeInBounce: easeInBounce,
easeOutBounce: easeOutBounce,
easeInOutBounce: easeInOutBounce
};
})();