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opentype.js
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opentype.js
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/**
* https://opentype.js.org v1.3.3 | (c) Frederik De Bleser and other contributors | MIT License | Uses tiny-inflate by Devon Govett and string.prototype.codepointat polyfill by Mathias Bynens
*/
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(global = global || self, factory(global.opentype = {}));
}(this, (function (exports) { 'use strict';
/*! https://mths.be/codepointat v0.2.0 by @mathias */
if (!String.prototype.codePointAt) {
(function() {
var defineProperty = (function() {
// IE 8 only supports `Object.defineProperty` on DOM elements
try {
var object = {};
var $defineProperty = Object.defineProperty;
var result = $defineProperty(object, object, object) && $defineProperty;
} catch(error) {}
return result;
}());
var codePointAt = function(position) {
if (this == null) {
throw TypeError();
}
var string = String(this);
var size = string.length;
// `ToInteger`
var index = position ? Number(position) : 0;
if (index != index) { // better `isNaN`
index = 0;
}
// Account for out-of-bounds indices:
if (index < 0 || index >= size) {
return undefined;
}
// Get the first code unit
var first = string.charCodeAt(index);
var second;
if ( // check if it’s the start of a surrogate pair
first >= 0xD800 && first <= 0xDBFF && // high surrogate
size > index + 1 // there is a next code unit
) {
second = string.charCodeAt(index + 1);
if (second >= 0xDC00 && second <= 0xDFFF) { // low surrogate
// https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
return (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
}
}
return first;
};
if (defineProperty) {
defineProperty(String.prototype, 'codePointAt', {
'value': codePointAt,
'configurable': true,
'writable': true
});
} else {
String.prototype.codePointAt = codePointAt;
}
}());
}
var TINF_OK = 0;
var TINF_DATA_ERROR = -3;
function Tree() {
this.table = new Uint16Array(16); /* table of code length counts */
this.trans = new Uint16Array(288); /* code -> symbol translation table */
}
function Data(source, dest) {
this.source = source;
this.sourceIndex = 0;
this.tag = 0;
this.bitcount = 0;
this.dest = dest;
this.destLen = 0;
this.ltree = new Tree(); /* dynamic length/symbol tree */
this.dtree = new Tree(); /* dynamic distance tree */
}
/* --------------------------------------------------- *
* -- uninitialized global data (static structures) -- *
* --------------------------------------------------- */
var sltree = new Tree();
var sdtree = new Tree();
/* extra bits and base tables for length codes */
var length_bits = new Uint8Array(30);
var length_base = new Uint16Array(30);
/* extra bits and base tables for distance codes */
var dist_bits = new Uint8Array(30);
var dist_base = new Uint16Array(30);
/* special ordering of code length codes */
var clcidx = new Uint8Array([
16, 17, 18, 0, 8, 7, 9, 6,
10, 5, 11, 4, 12, 3, 13, 2,
14, 1, 15
]);
/* used by tinf_decode_trees, avoids allocations every call */
var code_tree = new Tree();
var lengths = new Uint8Array(288 + 32);
/* ----------------------- *
* -- utility functions -- *
* ----------------------- */
/* build extra bits and base tables */
function tinf_build_bits_base(bits, base, delta, first) {
var i, sum;
/* build bits table */
for (i = 0; i < delta; ++i) { bits[i] = 0; }
for (i = 0; i < 30 - delta; ++i) { bits[i + delta] = i / delta | 0; }
/* build base table */
for (sum = first, i = 0; i < 30; ++i) {
base[i] = sum;
sum += 1 << bits[i];
}
}
/* build the fixed huffman trees */
function tinf_build_fixed_trees(lt, dt) {
var i;
/* build fixed length tree */
for (i = 0; i < 7; ++i) { lt.table[i] = 0; }
lt.table[7] = 24;
lt.table[8] = 152;
lt.table[9] = 112;
for (i = 0; i < 24; ++i) { lt.trans[i] = 256 + i; }
for (i = 0; i < 144; ++i) { lt.trans[24 + i] = i; }
for (i = 0; i < 8; ++i) { lt.trans[24 + 144 + i] = 280 + i; }
for (i = 0; i < 112; ++i) { lt.trans[24 + 144 + 8 + i] = 144 + i; }
/* build fixed distance tree */
for (i = 0; i < 5; ++i) { dt.table[i] = 0; }
dt.table[5] = 32;
for (i = 0; i < 32; ++i) { dt.trans[i] = i; }
}
/* given an array of code lengths, build a tree */
var offs = new Uint16Array(16);
function tinf_build_tree(t, lengths, off, num) {
var i, sum;
/* clear code length count table */
for (i = 0; i < 16; ++i) { t.table[i] = 0; }
/* scan symbol lengths, and sum code length counts */
for (i = 0; i < num; ++i) { t.table[lengths[off + i]]++; }
t.table[0] = 0;
/* compute offset table for distribution sort */
for (sum = 0, i = 0; i < 16; ++i) {
offs[i] = sum;
sum += t.table[i];
}
/* create code->symbol translation table (symbols sorted by code) */
for (i = 0; i < num; ++i) {
if (lengths[off + i]) { t.trans[offs[lengths[off + i]]++] = i; }
}
}
/* ---------------------- *
* -- decode functions -- *
* ---------------------- */
/* get one bit from source stream */
function tinf_getbit(d) {
/* check if tag is empty */
if (!d.bitcount--) {
/* load next tag */
d.tag = d.source[d.sourceIndex++];
d.bitcount = 7;
}
/* shift bit out of tag */
var bit = d.tag & 1;
d.tag >>>= 1;
return bit;
}
/* read a num bit value from a stream and add base */
function tinf_read_bits(d, num, base) {
if (!num)
{ return base; }
while (d.bitcount < 24) {
d.tag |= d.source[d.sourceIndex++] << d.bitcount;
d.bitcount += 8;
}
var val = d.tag & (0xffff >>> (16 - num));
d.tag >>>= num;
d.bitcount -= num;
return val + base;
}
/* given a data stream and a tree, decode a symbol */
function tinf_decode_symbol(d, t) {
while (d.bitcount < 24) {
d.tag |= d.source[d.sourceIndex++] << d.bitcount;
d.bitcount += 8;
}
var sum = 0, cur = 0, len = 0;
var tag = d.tag;
/* get more bits while code value is above sum */
do {
cur = 2 * cur + (tag & 1);
tag >>>= 1;
++len;
sum += t.table[len];
cur -= t.table[len];
} while (cur >= 0);
d.tag = tag;
d.bitcount -= len;
return t.trans[sum + cur];
}
/* given a data stream, decode dynamic trees from it */
function tinf_decode_trees(d, lt, dt) {
var hlit, hdist, hclen;
var i, num, length;
/* get 5 bits HLIT (257-286) */
hlit = tinf_read_bits(d, 5, 257);
/* get 5 bits HDIST (1-32) */
hdist = tinf_read_bits(d, 5, 1);
/* get 4 bits HCLEN (4-19) */
hclen = tinf_read_bits(d, 4, 4);
for (i = 0; i < 19; ++i) { lengths[i] = 0; }
/* read code lengths for code length alphabet */
for (i = 0; i < hclen; ++i) {
/* get 3 bits code length (0-7) */
var clen = tinf_read_bits(d, 3, 0);
lengths[clcidx[i]] = clen;
}
/* build code length tree */
tinf_build_tree(code_tree, lengths, 0, 19);
/* decode code lengths for the dynamic trees */
for (num = 0; num < hlit + hdist;) {
var sym = tinf_decode_symbol(d, code_tree);
switch (sym) {
case 16:
/* copy previous code length 3-6 times (read 2 bits) */
var prev = lengths[num - 1];
for (length = tinf_read_bits(d, 2, 3); length; --length) {
lengths[num++] = prev;
}
break;
case 17:
/* repeat code length 0 for 3-10 times (read 3 bits) */
for (length = tinf_read_bits(d, 3, 3); length; --length) {
lengths[num++] = 0;
}
break;
case 18:
/* repeat code length 0 for 11-138 times (read 7 bits) */
for (length = tinf_read_bits(d, 7, 11); length; --length) {
lengths[num++] = 0;
}
break;
default:
/* values 0-15 represent the actual code lengths */
lengths[num++] = sym;
break;
}
}
/* build dynamic trees */
tinf_build_tree(lt, lengths, 0, hlit);
tinf_build_tree(dt, lengths, hlit, hdist);
}
/* ----------------------------- *
* -- block inflate functions -- *
* ----------------------------- */
/* given a stream and two trees, inflate a block of data */
function tinf_inflate_block_data(d, lt, dt) {
while (1) {
var sym = tinf_decode_symbol(d, lt);
/* check for end of block */
if (sym === 256) {
return TINF_OK;
}
if (sym < 256) {
d.dest[d.destLen++] = sym;
} else {
var length, dist, offs;
var i;
sym -= 257;
/* possibly get more bits from length code */
length = tinf_read_bits(d, length_bits[sym], length_base[sym]);
dist = tinf_decode_symbol(d, dt);
/* possibly get more bits from distance code */
offs = d.destLen - tinf_read_bits(d, dist_bits[dist], dist_base[dist]);
/* copy match */
for (i = offs; i < offs + length; ++i) {
d.dest[d.destLen++] = d.dest[i];
}
}
}
}
/* inflate an uncompressed block of data */
function tinf_inflate_uncompressed_block(d) {
var length, invlength;
var i;
/* unread from bitbuffer */
while (d.bitcount > 8) {
d.sourceIndex--;
d.bitcount -= 8;
}
/* get length */
length = d.source[d.sourceIndex + 1];
length = 256 * length + d.source[d.sourceIndex];
/* get one's complement of length */
invlength = d.source[d.sourceIndex + 3];
invlength = 256 * invlength + d.source[d.sourceIndex + 2];
/* check length */
if (length !== (~invlength & 0x0000ffff))
{ return TINF_DATA_ERROR; }
d.sourceIndex += 4;
/* copy block */
for (i = length; i; --i)
{ d.dest[d.destLen++] = d.source[d.sourceIndex++]; }
/* make sure we start next block on a byte boundary */
d.bitcount = 0;
return TINF_OK;
}
/* inflate stream from source to dest */
function tinf_uncompress(source, dest) {
var d = new Data(source, dest);
var bfinal, btype, res;
do {
/* read final block flag */
bfinal = tinf_getbit(d);
/* read block type (2 bits) */
btype = tinf_read_bits(d, 2, 0);
/* decompress block */
switch (btype) {
case 0:
/* decompress uncompressed block */
res = tinf_inflate_uncompressed_block(d);
break;
case 1:
/* decompress block with fixed huffman trees */
res = tinf_inflate_block_data(d, sltree, sdtree);
break;
case 2:
/* decompress block with dynamic huffman trees */
tinf_decode_trees(d, d.ltree, d.dtree);
res = tinf_inflate_block_data(d, d.ltree, d.dtree);
break;
default:
res = TINF_DATA_ERROR;
}
if (res !== TINF_OK)
{ throw new Error('Data error'); }
} while (!bfinal);
if (d.destLen < d.dest.length) {
if (typeof d.dest.slice === 'function')
{ return d.dest.slice(0, d.destLen); }
else
{ return d.dest.subarray(0, d.destLen); }
}
return d.dest;
}
/* -------------------- *
* -- initialization -- *
* -------------------- */
/* build fixed huffman trees */
tinf_build_fixed_trees(sltree, sdtree);
/* build extra bits and base tables */
tinf_build_bits_base(length_bits, length_base, 4, 3);
tinf_build_bits_base(dist_bits, dist_base, 2, 1);
/* fix a special case */
length_bits[28] = 0;
length_base[28] = 258;
var tinyInflate = tinf_uncompress;
// The Bounding Box object
function derive(v0, v1, v2, v3, t) {
return Math.pow(1 - t, 3) * v0 +
3 * Math.pow(1 - t, 2) * t * v1 +
3 * (1 - t) * Math.pow(t, 2) * v2 +
Math.pow(t, 3) * v3;
}
/**
* A bounding box is an enclosing box that describes the smallest measure within which all the points lie.
* It is used to calculate the bounding box of a glyph or text path.
*
* On initialization, x1/y1/x2/y2 will be NaN. Check if the bounding box is empty using `isEmpty()`.
*
* @exports opentype.BoundingBox
* @class
* @constructor
*/
function BoundingBox() {
this.x1 = Number.NaN;
this.y1 = Number.NaN;
this.x2 = Number.NaN;
this.y2 = Number.NaN;
}
/**
* Returns true if the bounding box is empty, that is, no points have been added to the box yet.
*/
BoundingBox.prototype.isEmpty = function() {
return isNaN(this.x1) || isNaN(this.y1) || isNaN(this.x2) || isNaN(this.y2);
};
/**
* Add the point to the bounding box.
* The x1/y1/x2/y2 coordinates of the bounding box will now encompass the given point.
* @param {number} x - The X coordinate of the point.
* @param {number} y - The Y coordinate of the point.
*/
BoundingBox.prototype.addPoint = function(x, y) {
if (typeof x === 'number') {
if (isNaN(this.x1) || isNaN(this.x2)) {
this.x1 = x;
this.x2 = x;
}
if (x < this.x1) {
this.x1 = x;
}
if (x > this.x2) {
this.x2 = x;
}
}
if (typeof y === 'number') {
if (isNaN(this.y1) || isNaN(this.y2)) {
this.y1 = y;
this.y2 = y;
}
if (y < this.y1) {
this.y1 = y;
}
if (y > this.y2) {
this.y2 = y;
}
}
};
/**
* Add a X coordinate to the bounding box.
* This extends the bounding box to include the X coordinate.
* This function is used internally inside of addBezier.
* @param {number} x - The X coordinate of the point.
*/
BoundingBox.prototype.addX = function(x) {
this.addPoint(x, null);
};
/**
* Add a Y coordinate to the bounding box.
* This extends the bounding box to include the Y coordinate.
* This function is used internally inside of addBezier.
* @param {number} y - The Y coordinate of the point.
*/
BoundingBox.prototype.addY = function(y) {
this.addPoint(null, y);
};
/**
* Add a Bézier curve to the bounding box.
* This extends the bounding box to include the entire Bézier.
* @param {number} x0 - The starting X coordinate.
* @param {number} y0 - The starting Y coordinate.
* @param {number} x1 - The X coordinate of the first control point.
* @param {number} y1 - The Y coordinate of the first control point.
* @param {number} x2 - The X coordinate of the second control point.
* @param {number} y2 - The Y coordinate of the second control point.
* @param {number} x - The ending X coordinate.
* @param {number} y - The ending Y coordinate.
*/
BoundingBox.prototype.addBezier = function(x0, y0, x1, y1, x2, y2, x, y) {
// This code is based on http://nishiohirokazu.blogspot.com/2009/06/how-to-calculate-bezier-curves-bounding.html
// and https://github.com/icons8/svg-path-bounding-box
var p0 = [x0, y0];
var p1 = [x1, y1];
var p2 = [x2, y2];
var p3 = [x, y];
this.addPoint(x0, y0);
this.addPoint(x, y);
for (var i = 0; i <= 1; i++) {
var b = 6 * p0[i] - 12 * p1[i] + 6 * p2[i];
var a = -3 * p0[i] + 9 * p1[i] - 9 * p2[i] + 3 * p3[i];
var c = 3 * p1[i] - 3 * p0[i];
if (a === 0) {
if (b === 0) { continue; }
var t = -c / b;
if (0 < t && t < 1) {
if (i === 0) { this.addX(derive(p0[i], p1[i], p2[i], p3[i], t)); }
if (i === 1) { this.addY(derive(p0[i], p1[i], p2[i], p3[i], t)); }
}
continue;
}
var b2ac = Math.pow(b, 2) - 4 * c * a;
if (b2ac < 0) { continue; }
var t1 = (-b + Math.sqrt(b2ac)) / (2 * a);
if (0 < t1 && t1 < 1) {
if (i === 0) { this.addX(derive(p0[i], p1[i], p2[i], p3[i], t1)); }
if (i === 1) { this.addY(derive(p0[i], p1[i], p2[i], p3[i], t1)); }
}
var t2 = (-b - Math.sqrt(b2ac)) / (2 * a);
if (0 < t2 && t2 < 1) {
if (i === 0) { this.addX(derive(p0[i], p1[i], p2[i], p3[i], t2)); }
if (i === 1) { this.addY(derive(p0[i], p1[i], p2[i], p3[i], t2)); }
}
}
};
/**
* Add a quadratic curve to the bounding box.
* This extends the bounding box to include the entire quadratic curve.
* @param {number} x0 - The starting X coordinate.
* @param {number} y0 - The starting Y coordinate.
* @param {number} x1 - The X coordinate of the control point.
* @param {number} y1 - The Y coordinate of the control point.
* @param {number} x - The ending X coordinate.
* @param {number} y - The ending Y coordinate.
*/
BoundingBox.prototype.addQuad = function(x0, y0, x1, y1, x, y) {
var cp1x = x0 + 2 / 3 * (x1 - x0);
var cp1y = y0 + 2 / 3 * (y1 - y0);
var cp2x = cp1x + 1 / 3 * (x - x0);
var cp2y = cp1y + 1 / 3 * (y - y0);
this.addBezier(x0, y0, cp1x, cp1y, cp2x, cp2y, x, y);
};
// Geometric objects
/**
* A bézier path containing a set of path commands similar to a SVG path.
* Paths can be drawn on a context using `draw`.
* @exports opentype.Path
* @class
* @constructor
*/
function Path() {
this.commands = [];
this.fill = 'black';
this.stroke = null;
this.strokeWidth = 1;
}
/**
* @param {number} x
* @param {number} y
*/
Path.prototype.moveTo = function(x, y) {
this.commands.push({
type: 'M',
x: x,
y: y
});
};
/**
* @param {number} x
* @param {number} y
*/
Path.prototype.lineTo = function(x, y) {
this.commands.push({
type: 'L',
x: x,
y: y
});
};
/**
* Draws cubic curve
* @function
* curveTo
* @memberof opentype.Path.prototype
* @param {number} x1 - x of control 1
* @param {number} y1 - y of control 1
* @param {number} x2 - x of control 2
* @param {number} y2 - y of control 2
* @param {number} x - x of path point
* @param {number} y - y of path point
*/
/**
* Draws cubic curve
* @function
* bezierCurveTo
* @memberof opentype.Path.prototype
* @param {number} x1 - x of control 1
* @param {number} y1 - y of control 1
* @param {number} x2 - x of control 2
* @param {number} y2 - y of control 2
* @param {number} x - x of path point
* @param {number} y - y of path point
* @see curveTo
*/
Path.prototype.curveTo = Path.prototype.bezierCurveTo = function(x1, y1, x2, y2, x, y) {
this.commands.push({
type: 'C',
x1: x1,
y1: y1,
x2: x2,
y2: y2,
x: x,
y: y
});
};
/**
* Draws quadratic curve
* @function
* quadraticCurveTo
* @memberof opentype.Path.prototype
* @param {number} x1 - x of control
* @param {number} y1 - y of control
* @param {number} x - x of path point
* @param {number} y - y of path point
*/
/**
* Draws quadratic curve
* @function
* quadTo
* @memberof opentype.Path.prototype
* @param {number} x1 - x of control
* @param {number} y1 - y of control
* @param {number} x - x of path point
* @param {number} y - y of path point
*/
Path.prototype.quadTo = Path.prototype.quadraticCurveTo = function(x1, y1, x, y) {
this.commands.push({
type: 'Q',
x1: x1,
y1: y1,
x: x,
y: y
});
};
/**
* Closes the path
* @function closePath
* @memberof opentype.Path.prototype
*/
/**
* Close the path
* @function close
* @memberof opentype.Path.prototype
*/
Path.prototype.close = Path.prototype.closePath = function() {
this.commands.push({
type: 'Z'
});
};
/**
* Add the given path or list of commands to the commands of this path.
* @param {Array} pathOrCommands - another opentype.Path, an opentype.BoundingBox, or an array of commands.
*/
Path.prototype.extend = function(pathOrCommands) {
if (pathOrCommands.commands) {
pathOrCommands = pathOrCommands.commands;
} else if (pathOrCommands instanceof BoundingBox) {
var box = pathOrCommands;
this.moveTo(box.x1, box.y1);
this.lineTo(box.x2, box.y1);
this.lineTo(box.x2, box.y2);
this.lineTo(box.x1, box.y2);
this.close();
return;
}
Array.prototype.push.apply(this.commands, pathOrCommands);
};
/**
* Calculate the bounding box of the path.
* @returns {opentype.BoundingBox}
*/
Path.prototype.getBoundingBox = function() {
var box = new BoundingBox();
var startX = 0;
var startY = 0;
var prevX = 0;
var prevY = 0;
for (var i = 0; i < this.commands.length; i++) {
var cmd = this.commands[i];
switch (cmd.type) {
case 'M':
box.addPoint(cmd.x, cmd.y);
startX = prevX = cmd.x;
startY = prevY = cmd.y;
break;
case 'L':
box.addPoint(cmd.x, cmd.y);
prevX = cmd.x;
prevY = cmd.y;
break;
case 'Q':
box.addQuad(prevX, prevY, cmd.x1, cmd.y1, cmd.x, cmd.y);
prevX = cmd.x;
prevY = cmd.y;
break;
case 'C':
box.addBezier(prevX, prevY, cmd.x1, cmd.y1, cmd.x2, cmd.y2, cmd.x, cmd.y);
prevX = cmd.x;
prevY = cmd.y;
break;
case 'Z':
prevX = startX;
prevY = startY;
break;
default:
throw new Error('Unexpected path command ' + cmd.type);
}
}
if (box.isEmpty()) {
box.addPoint(0, 0);
}
return box;
};
/**
* Draw the path to a 2D context.
* @param {CanvasRenderingContext2D} ctx - A 2D drawing context.
*/
Path.prototype.draw = function(ctx) {
ctx.beginPath();
for (var i = 0; i < this.commands.length; i += 1) {
var cmd = this.commands[i];
if (cmd.type === 'M') {
ctx.moveTo(cmd.x, cmd.y);
} else if (cmd.type === 'L') {
ctx.lineTo(cmd.x, cmd.y);
} else if (cmd.type === 'C') {
ctx.bezierCurveTo(cmd.x1, cmd.y1, cmd.x2, cmd.y2, cmd.x, cmd.y);
} else if (cmd.type === 'Q') {
ctx.quadraticCurveTo(cmd.x1, cmd.y1, cmd.x, cmd.y);
} else if (cmd.type === 'Z') {
ctx.closePath();
}
}
if (this.fill) {
ctx.fillStyle = this.fill;
ctx.fill();
}
if (this.stroke) {
ctx.strokeStyle = this.stroke;
ctx.lineWidth = this.strokeWidth;
ctx.stroke();
}
};
/**
* Convert the Path to a string of path data instructions
* See http://www.w3.org/TR/SVG/paths.html#PathData
* @param {number} [decimalPlaces=2] - The amount of decimal places for floating-point values
* @return {string}
*/
Path.prototype.toPathData = function(decimalPlaces) {
decimalPlaces = decimalPlaces !== undefined ? decimalPlaces : 2;
function floatToString(v) {
if (Math.round(v) === v) {
return '' + Math.round(v);
} else {
return v.toFixed(decimalPlaces);
}
}
function packValues() {
var arguments$1 = arguments;
var s = '';
for (var i = 0; i < arguments.length; i += 1) {
var v = arguments$1[i];
if (v >= 0 && i > 0) {
s += ' ';
}
s += floatToString(v);
}
return s;
}
var d = '';
for (var i = 0; i < this.commands.length; i += 1) {
var cmd = this.commands[i];
if (cmd.type === 'M') {
d += 'M' + packValues(cmd.x, cmd.y);
} else if (cmd.type === 'L') {
d += 'L' + packValues(cmd.x, cmd.y);
} else if (cmd.type === 'C') {
d += 'C' + packValues(cmd.x1, cmd.y1, cmd.x2, cmd.y2, cmd.x, cmd.y);
} else if (cmd.type === 'Q') {
d += 'Q' + packValues(cmd.x1, cmd.y1, cmd.x, cmd.y);
} else if (cmd.type === 'Z') {
d += 'Z';
}
}
return d;
};
/**
* Convert the path to an SVG <path> element, as a string.
* @param {number} [decimalPlaces=2] - The amount of decimal places for floating-point values
* @return {string}
*/
Path.prototype.toSVG = function(decimalPlaces) {
var svg = '<path d="';
svg += this.toPathData(decimalPlaces);
svg += '"';
if (this.fill && this.fill !== 'black') {
if (this.fill === null) {
svg += ' fill="none"';
} else {
svg += ' fill="' + this.fill + '"';
}
}
if (this.stroke) {
svg += ' stroke="' + this.stroke + '" stroke-width="' + this.strokeWidth + '"';
}
svg += '/>';
return svg;
};
/**
* Convert the path to a DOM element.
* @param {number} [decimalPlaces=2] - The amount of decimal places for floating-point values
* @return {SVGPathElement}
*/
Path.prototype.toDOMElement = function(decimalPlaces) {
var temporaryPath = this.toPathData(decimalPlaces);
var newPath = document.createElementNS('http://www.w3.org/2000/svg', 'path');
newPath.setAttribute('d', temporaryPath);
return newPath;
};
// Run-time checking of preconditions.
function fail(message) {
throw new Error(message);
}
// Precondition function that checks if the given predicate is true.
// If not, it will throw an error.
function argument(predicate, message) {
if (!predicate) {
fail(message);
}
}
var check = { fail: fail, argument: argument, assert: argument };
// Data types used in the OpenType font file.
var LIMIT16 = 32768; // The limit at which a 16-bit number switches signs == 2^15
var LIMIT32 = 2147483648; // The limit at which a 32-bit number switches signs == 2 ^ 31
/**
* @exports opentype.decode
* @class
*/
var decode = {};
/**
* @exports opentype.encode
* @class
*/
var encode = {};
/**
* @exports opentype.sizeOf
* @class
*/
var sizeOf = {};
// Return a function that always returns the same value.
function constant(v) {
return function() {
return v;
};
}
// OpenType data types //////////////////////////////////////////////////////
/**
* Convert an 8-bit unsigned integer to a list of 1 byte.
* @param {number}
* @returns {Array}
*/
encode.BYTE = function(v) {
check.argument(v >= 0 && v <= 255, 'Byte value should be between 0 and 255.');
return [v];
};
/**
* @constant
* @type {number}
*/
sizeOf.BYTE = constant(1);
/**
* Convert a 8-bit signed integer to a list of 1 byte.
* @param {string}
* @returns {Array}
*/
encode.CHAR = function(v) {
return [v.charCodeAt(0)];
};
/**
* @constant
* @type {number}
*/
sizeOf.CHAR = constant(1);
/**
* Convert an ASCII string to a list of bytes.
* @param {string}
* @returns {Array}
*/
encode.CHARARRAY = function(v) {
var b = [];
for (var i = 0; i < v.length; i += 1) {
b[i] = v.charCodeAt(i);
}