canvas.js

/**
 * Copyright 2014 Google Inc. All rights reserved.
 *
 * Use of this source code is governed by a BSD-style
 * license that can be found in the LICENSE file.
 *
 * @fileoverview Description of this file.
 *
 * A polyfill for HTML Canvas features, including
 * Path2D support.
 */
if (CanvasRenderingContext2D.prototype.ellipse == undefined) {
  CanvasRenderingContext2D.prototype.ellipse = function(x, y, radiusX, radiusY, rotation, startAngle, endAngle, antiClockwise) {
    this.save();
    this.translate(x, y);
    this.rotate(rotation);
    this.scale(radiusX, radiusY);
    this.arc(0, 0, 1, startAngle, endAngle, antiClockwise);
    this.restore();
  }
}

if (typeof Path2D !== 'function') {
  (function() {

    // Include the SVG path parser.
    parser = (function() {
      /*
       * Generated by PEG.js 0.8.0.
       *
       * http://pegjs.majda.cz/
       */
    
      function peg$subclass(child, parent) {
        function ctor() { this.constructor = child; }
        ctor.prototype = parent.prototype;
        child.prototype = new ctor();
      }
    
      function SyntaxError(message, expected, found, offset, line, column) {
        this.message  = message;
        this.expected = expected;
        this.found    = found;
        this.offset   = offset;
        this.line     = line;
        this.column   = column;
    
        this.name     = "SyntaxError";
      }
    
      peg$subclass(SyntaxError, Error);
    
      function parse(input) {
        var options = arguments.length > 1 ? arguments[1] : {},
    
            peg$FAILED = {},
    
            peg$startRuleFunctions = { svg_path: peg$parsesvg_path },
            peg$startRuleFunction  = peg$parsesvg_path,
    
            peg$c0 = peg$FAILED,
            peg$c1 = [],
            peg$c2 = null,
            peg$c3 = function(d) { return ops; },
            peg$c4 = /^[Mm]/,
            peg$c5 = { type: "class", value: "[Mm]", description: "[Mm]" },
            peg$c6 = function(ch, args) {
                  var moveCh = ch
                  // If this is the first move cmd then force it to be absolute.
                  if (firstSubPath) {
                    moveCh = 'M';
                    firstSubPath = false;
                  }
                  ops.push({type: 'moveTo', args: makeAbsolute(moveCh, args[0])});
                  for (var i=1; i < args.length; i++) {
                    // The lineTo args are either abs or relative, depending on the
                    // original moveto command.
                    ops.push({type: 'lineTo', args: makeAbsolute(ch, args[i])});
                  }
                },
            peg$c7 = function(one, rest) { return concatSequence(one, rest); },
            peg$c8 = /^[Zz]/,
            peg$c9 = { type: "class", value: "[Zz]", description: "[Zz]" },
            peg$c10 = function() { ops.push({type: 'closePath', args: []}); },
            peg$c11 = /^[Ll]/,
            peg$c12 = { type: "class", value: "[Ll]", description: "[Ll]" },
            peg$c13 = function(ch, args) {
                  for (var i=0; i < args.length; i++) {
                    ops.push({type: 'lineTo', args: makeAbsolute(ch, args[i])});
                  }
                },
            peg$c14 = /^[Hh]/,
            peg$c15 = { type: "class", value: "[Hh]", description: "[Hh]" },
            peg$c16 = function(ch, args) {
                for (var i=0; i < args.length; i++) {
                  ops.push({type: 'lineTo', args: makeAbsoluteFromX(ch, args[i])});
                }
              },
            peg$c17 = /^[Vv]/,
            peg$c18 = { type: "class", value: "[Vv]", description: "[Vv]" },
            peg$c19 = function(ch, args) {
                for (var i=0; i < args.length; i++) {
                  ops.push({type: 'lineTo', args: makeAbsoluteFromY(ch, args[i])});
                }
              },
            peg$c20 = /^[Cc]/,
            peg$c21 = { type: "class", value: "[Cc]", description: "[Cc]" },
            peg$c22 = function(ch, args) {
                for (var i=0; i < args.length; i++) {
                  ops.push({type: 'bezierCurveTo', args: makeAbsoluteMultiple(ch, args[i])});
                }
              },
            peg$c23 = function(cp1, cp2, last) { return cp1.concat(cp2, last); },
            peg$c24 = /^[Ss]/,
            peg$c25 = { type: "class", value: "[Ss]", description: "[Ss]" },
            peg$c26 = function(ch, args) {
                for (var i=0; i < args.length; i++) {
                  ops.push({type: 'bezierCurveTo', args: makeReflected().concat(makeAbsoluteMultiple(ch, args[i]))});
                }
              },
            peg$c27 = function(cp1, last) { return cp1.concat(last); },
            peg$c28 = /^[Qq]/,
            peg$c29 = { type: "class", value: "[Qq]", description: "[Qq]" },
            peg$c30 = function(ch, args) {
                for (var i=0; i < args.length; i++) {
                  ops.push({type: 'quadraticCurveTo', args: makeAbsoluteMultiple(ch, args[i])});
                }
              },
            peg$c31 = /^[Tt]/,
            peg$c32 = { type: "class", value: "[Tt]", description: "[Tt]" },
            peg$c33 = function(ch, args) {
                for (var i=0; i < args.length; i++) {
                  var reflected = makeReflected();
                  ops.push({type: 'quadraticCurveTo', args: reflected.concat(makeAbsoluteMultiple(ch, args[i]))});
                  lastControl = reflected.slice(0);
                }
              },
            peg$c34 = /^[Aa]/,
            peg$c35 = { type: "class", value: "[Aa]", description: "[Aa]" },
            peg$c36 = function(ch, args) {
                for (var i=0; i < args.length; i++) {
                  var x1 = [lastCoord.slice()];
                  var x2 = [makeAbsolute(ch, args[i].slice(-2))];
                  absArgs = x1.concat(args[i].slice(0, -2), x2);
                  ellipseFromEllipticalArc.apply(this, absArgs);
                }
              },
            peg$c37 = function(rx, ry, xrot, large, sweep, last) { return [parseFloat(rx), parseFloat(ry), parseFloat(flatten(xrot).join('')), parseInt(large), parseInt(sweep), last[0], last[1]]; },
            peg$c38 = function(x, y) { return [x, y] },
            peg$c39 = function(number) { return parseFloat(flatten(number).join('')) },
            peg$c40 = "0",
            peg$c41 = { type: "literal", value: "0", description: "\"0\"" },
            peg$c42 = "1",
            peg$c43 = { type: "literal", value: "1", description: "\"1\"" },
            peg$c44 = ",",
            peg$c45 = { type: "literal", value: ",", description: "\",\"" },
            peg$c46 = ".",
            peg$c47 = { type: "literal", value: ".", description: "\".\"" },
            peg$c48 = /^[eE]/,
            peg$c49 = { type: "class", value: "[eE]", description: "[eE]" },
            peg$c50 = "+",
            peg$c51 = { type: "literal", value: "+", description: "\"+\"" },
            peg$c52 = "-",
            peg$c53 = { type: "literal", value: "-", description: "\"-\"" },
            peg$c54 = /^[0-9]/,
            peg$c55 = { type: "class", value: "[0-9]", description: "[0-9]" },
            peg$c56 = function(digits) { return digits.join('') },
            peg$c57 = /^[ \t\n\r]/,
            peg$c58 = { type: "class", value: "[ \\t\\n\\r]", description: "[ \\t\\n\\r]" },
    
            peg$currPos          = 0,
            peg$reportedPos      = 0,
            peg$cachedPos        = 0,
            peg$cachedPosDetails = { line: 1, column: 1, seenCR: false },
            peg$maxFailPos       = 0,
            peg$maxFailExpected  = [],
            peg$silentFails      = 0,
    
            peg$result;
    
        if ("startRule" in options) {
          if (!(options.startRule in peg$startRuleFunctions)) {
            throw new Error("Can't start parsing from rule \"" + options.startRule + "\".");
          }
    
          peg$startRuleFunction = peg$startRuleFunctions[options.startRule];
        }
    
        function text() {
          return input.substring(peg$reportedPos, peg$currPos);
        }
    
        function offset() {
          return peg$reportedPos;
        }
    
        function line() {
          return peg$computePosDetails(peg$reportedPos).line;
        }
    
        function column() {
          return peg$computePosDetails(peg$reportedPos).column;
        }
    
        function expected(description) {
          throw peg$buildException(
            null,
            [{ type: "other", description: description }],
            peg$reportedPos
          );
        }
    
        function error(message) {
          throw peg$buildException(message, null, peg$reportedPos);
        }
    
        function peg$computePosDetails(pos) {
          function advance(details, startPos, endPos) {
            var p, ch;
    
            for (p = startPos; p < endPos; p++) {
              ch = input.charAt(p);
              if (ch === "\n") {
                if (!details.seenCR) { details.line++; }
                details.column = 1;
                details.seenCR = false;
              } else if (ch === "\r" || ch === "\u2028" || ch === "\u2029") {
                details.line++;
                details.column = 1;
                details.seenCR = true;
              } else {
                details.column++;
                details.seenCR = false;
              }
            }
          }
    
          if (peg$cachedPos !== pos) {
            if (peg$cachedPos > pos) {
              peg$cachedPos = 0;
              peg$cachedPosDetails = { line: 1, column: 1, seenCR: false };
            }
            advance(peg$cachedPosDetails, peg$cachedPos, pos);
            peg$cachedPos = pos;
          }
    
          return peg$cachedPosDetails;
        }
    
        function peg$fail(expected) {
          if (peg$currPos < peg$maxFailPos) { return; }
    
          if (peg$currPos > peg$maxFailPos) {
            peg$maxFailPos = peg$currPos;
            peg$maxFailExpected = [];
          }
    
          peg$maxFailExpected.push(expected);
        }
    
        function peg$buildException(message, expected, pos) {
          function cleanupExpected(expected) {
            var i = 1;
    
            expected.sort(function(a, b) {
              if (a.description < b.description) {
                return -1;
              } else if (a.description > b.description) {
                return 1;
              } else {
                return 0;
              }
            });
    
            while (i < expected.length) {
              if (expected[i - 1] === expected[i]) {
                expected.splice(i, 1);
              } else {
                i++;
              }
            }
          }
    
          function buildMessage(expected, found) {
            function stringEscape(s) {
              function hex(ch) { return ch.charCodeAt(0).toString(16).toUpperCase(); }
    
              return s
                .replace(/\\/g,   '\\\\')
                .replace(/"/g,    '\\"')
                .replace(/\x08/g, '\\b')
                .replace(/\t/g,   '\\t')
                .replace(/\n/g,   '\\n')
                .replace(/\f/g,   '\\f')
                .replace(/\r/g,   '\\r')
                .replace(/[\x00-\x07\x0B\x0E\x0F]/g, function(ch) { return '\\x0' + hex(ch); })
                .replace(/[\x10-\x1F\x80-\xFF]/g,    function(ch) { return '\\x'  + hex(ch); })
                .replace(/[\u0180-\u0FFF]/g,         function(ch) { return '\\u0' + hex(ch); })
                .replace(/[\u1080-\uFFFF]/g,         function(ch) { return '\\u'  + hex(ch); });
            }
    
            var expectedDescs = new Array(expected.length),
                expectedDesc, foundDesc, i;
    
            for (i = 0; i < expected.length; i++) {
              expectedDescs[i] = expected[i].description;
            }
    
            expectedDesc = expected.length > 1
              ? expectedDescs.slice(0, -1).join(", ")
                  + " or "
                  + expectedDescs[expected.length - 1]
              : expectedDescs[0];
    
            foundDesc = found ? "\"" + stringEscape(found) + "\"" : "end of input";
    
            return "Expected " + expectedDesc + " but " + foundDesc + " found.";
          }
    
          var posDetails = peg$computePosDetails(pos),
              found      = pos < input.length ? input.charAt(pos) : null;
    
          if (expected !== null) {
            cleanupExpected(expected);
          }
    
          return new SyntaxError(
            message !== null ? message : buildMessage(expected, found),
            expected,
            found,
            pos,
            posDetails.line,
            posDetails.column
          );
        }
    
        function peg$parsesvg_path() {
          var s0, s1, s2, s3, s4;
    
          s0 = peg$currPos;
          s1 = [];
          s2 = peg$parsewsp();
          while (s2 !== peg$FAILED) {
            s1.push(s2);
            s2 = peg$parsewsp();
          }
          if (s1 !== peg$FAILED) {
            s2 = peg$parsemoveTo_drawTo_commandGroups();
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              s3 = [];
              s4 = peg$parsewsp();
              while (s4 !== peg$FAILED) {
                s3.push(s4);
                s4 = peg$parsewsp();
              }
              if (s3 !== peg$FAILED) {
                peg$reportedPos = s0;
                s1 = peg$c3(s2);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsemoveTo_drawTo_commandGroups() {
          var s0, s1, s2, s3, s4;
    
          s0 = peg$currPos;
          s1 = peg$parsemoveTo_drawTo_commandGroup();
          if (s1 !== peg$FAILED) {
            s2 = peg$currPos;
            s3 = [];
            s4 = peg$parsewsp();
            while (s4 !== peg$FAILED) {
              s3.push(s4);
              s4 = peg$parsewsp();
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parsemoveTo_drawTo_commandGroups();
              if (s4 !== peg$FAILED) {
                s3 = [s3, s4];
                s2 = s3;
              } else {
                peg$currPos = s2;
                s2 = peg$c0;
              }
            } else {
              peg$currPos = s2;
              s2 = peg$c0;
            }
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              s1 = [s1, s2];
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsemoveTo_drawTo_commandGroup() {
          var s0, s1, s2, s3, s4;
    
          s0 = peg$currPos;
          s1 = peg$parsemoveto();
          if (s1 !== peg$FAILED) {
            s2 = peg$currPos;
            s3 = [];
            s4 = peg$parsewsp();
            while (s4 !== peg$FAILED) {
              s3.push(s4);
              s4 = peg$parsewsp();
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parsedrawto_commands();
              if (s4 !== peg$FAILED) {
                s3 = [s3, s4];
                s2 = s3;
              } else {
                peg$currPos = s2;
                s2 = peg$c0;
              }
            } else {
              peg$currPos = s2;
              s2 = peg$c0;
            }
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              s1 = [s1, s2];
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsedrawto_commands() {
          var s0, s1, s2, s3, s4;
    
          s0 = peg$currPos;
          s1 = peg$parsedrawto_command();
          if (s1 !== peg$FAILED) {
            s2 = peg$currPos;
            s3 = [];
            s4 = peg$parsewsp();
            while (s4 !== peg$FAILED) {
              s3.push(s4);
              s4 = peg$parsewsp();
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parsedrawto_commands();
              if (s4 !== peg$FAILED) {
                s3 = [s3, s4];
                s2 = s3;
              } else {
                peg$currPos = s2;
                s2 = peg$c0;
              }
            } else {
              peg$currPos = s2;
              s2 = peg$c0;
            }
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              s1 = [s1, s2];
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsedrawto_command() {
          var s0;
    
          s0 = peg$parseclosepath();
          if (s0 === peg$FAILED) {
            s0 = peg$parselineto();
            if (s0 === peg$FAILED) {
              s0 = peg$parsehorizontal_lineto();
              if (s0 === peg$FAILED) {
                s0 = peg$parsevertical_lineto();
                if (s0 === peg$FAILED) {
                  s0 = peg$parsecurveto();
                  if (s0 === peg$FAILED) {
                    s0 = peg$parsesmooth_curveto();
                    if (s0 === peg$FAILED) {
                      s0 = peg$parsequadratic_bezier_curveto();
                      if (s0 === peg$FAILED) {
                        s0 = peg$parsesmooth_quadratic_bezier_curveto();
                        if (s0 === peg$FAILED) {
                          s0 = peg$parseelliptical_arc();
                        }
                      }
                    }
                  }
                }
              }
            }
          }
    
          return s0;
        }
    
        function peg$parsemoveto() {
          var s0, s1, s2, s3;
    
          s0 = peg$currPos;
          if (peg$c4.test(input.charAt(peg$currPos))) {
            s1 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c5); }
          }
          if (s1 !== peg$FAILED) {
            s2 = [];
            s3 = peg$parsewsp();
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              s3 = peg$parsewsp();
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parsemoveto_argument_sequence();
              if (s3 !== peg$FAILED) {
                peg$reportedPos = s0;
                s1 = peg$c6(s1, s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsemoveto_argument_sequence() {
          var s0, s1, s2, s3, s4;
    
          s0 = peg$currPos;
          s1 = peg$parsecoordinate_pair();
          if (s1 !== peg$FAILED) {
            s2 = peg$currPos;
            s3 = peg$parsecomma_wsp();
            if (s3 === peg$FAILED) {
              s3 = peg$c2;
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parselineto_argument_sequence();
              if (s4 !== peg$FAILED) {
                s3 = [s3, s4];
                s2 = s3;
              } else {
                peg$currPos = s2;
                s2 = peg$c0;
              }
            } else {
              peg$currPos = s2;
              s2 = peg$c0;
            }
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              peg$reportedPos = s0;
              s1 = peg$c7(s1, s2);
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parseclosepath() {
          var s0, s1;
    
          s0 = peg$currPos;
          if (peg$c8.test(input.charAt(peg$currPos))) {
            s1 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c9); }
          }
          if (s1 !== peg$FAILED) {
            peg$reportedPos = s0;
            s1 = peg$c10();
          }
          s0 = s1;
    
          return s0;
        }
    
        function peg$parselineto() {
          var s0, s1, s2, s3;
    
          s0 = peg$currPos;
          if (peg$c11.test(input.charAt(peg$currPos))) {
            s1 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c12); }
          }
          if (s1 !== peg$FAILED) {
            s2 = [];
            s3 = peg$parsewsp();
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              s3 = peg$parsewsp();
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parselineto_argument_sequence();
              if (s3 !== peg$FAILED) {
                peg$reportedPos = s0;
                s1 = peg$c13(s1, s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parselineto_argument_sequence() {
          var s0, s1, s2, s3, s4;
    
          s0 = peg$currPos;
          s1 = peg$parsecoordinate_pair();
          if (s1 !== peg$FAILED) {
            s2 = peg$currPos;
            s3 = peg$parsecomma_wsp();
            if (s3 === peg$FAILED) {
              s3 = peg$c2;
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parselineto_argument_sequence();
              if (s4 !== peg$FAILED) {
                s3 = [s3, s4];
                s2 = s3;
              } else {
                peg$currPos = s2;
                s2 = peg$c0;
              }
            } else {
              peg$currPos = s2;
              s2 = peg$c0;
            }
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              peg$reportedPos = s0;
              s1 = peg$c7(s1, s2);
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsehorizontal_lineto() {
          var s0, s1, s2, s3;
    
          s0 = peg$currPos;
          if (peg$c14.test(input.charAt(peg$currPos))) {
            s1 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c15); }
          }
          if (s1 !== peg$FAILED) {
            s2 = [];
            s3 = peg$parsewsp();
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              s3 = peg$parsewsp();
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parsecoordinate_sequence();
              if (s3 !== peg$FAILED) {
                peg$reportedPos = s0;
                s1 = peg$c16(s1, s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsecoordinate_sequence() {
          var s0, s1, s2, s3, s4;
    
          s0 = peg$currPos;
          s1 = peg$parsecoordinate();
          if (s1 !== peg$FAILED) {
            s2 = peg$currPos;
            s3 = peg$parsecomma_wsp();
            if (s3 === peg$FAILED) {
              s3 = peg$c2;
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parsecoordinate_sequence();
              if (s4 !== peg$FAILED) {
                s3 = [s3, s4];
                s2 = s3;
              } else {
                peg$currPos = s2;
                s2 = peg$c0;
              }
            } else {
              peg$currPos = s2;
              s2 = peg$c0;
            }
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              peg$reportedPos = s0;
              s1 = peg$c7(s1, s2);
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsevertical_lineto() {
          var s0, s1, s2, s3;
    
          s0 = peg$currPos;
          if (peg$c17.test(input.charAt(peg$currPos))) {
            s1 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c18); }
          }
          if (s1 !== peg$FAILED) {
            s2 = [];
            s3 = peg$parsewsp();
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              s3 = peg$parsewsp();
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parsecoordinate_sequence();
              if (s3 !== peg$FAILED) {
                peg$reportedPos = s0;
                s1 = peg$c19(s1, s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsecurveto() {
          var s0, s1, s2, s3;
    
          s0 = peg$currPos;
          if (peg$c20.test(input.charAt(peg$currPos))) {
            s1 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c21); }
          }
          if (s1 !== peg$FAILED) {
            s2 = [];
            s3 = peg$parsewsp();
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              s3 = peg$parsewsp();
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parsecurveto_argument_sequence();
              if (s3 !== peg$FAILED) {
                peg$reportedPos = s0;
                s1 = peg$c22(s1, s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsecurveto_argument_sequence() {
          var s0, s1, s2, s3, s4;
    
          s0 = peg$currPos;
          s1 = peg$parsecurveto_argument();
          if (s1 !== peg$FAILED) {
            s2 = peg$currPos;
            s3 = peg$parsecomma_wsp();
            if (s3 === peg$FAILED) {
              s3 = peg$c2;
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parsecurveto_argument_sequence();
              if (s4 !== peg$FAILED) {
                s3 = [s3, s4];
                s2 = s3;
              } else {
                peg$currPos = s2;
                s2 = peg$c0;
              }
            } else {
              peg$currPos = s2;
              s2 = peg$c0;
            }
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              peg$reportedPos = s0;
              s1 = peg$c7(s1, s2);
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsecurveto_argument() {
          var s0, s1, s2, s3, s4, s5;
    
          s0 = peg$currPos;
          s1 = peg$parsecoordinate_pair();
          if (s1 !== peg$FAILED) {
            s2 = peg$parsecomma_wsp();
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parsecoordinate_pair();
              if (s3 !== peg$FAILED) {
                s4 = peg$parsecomma_wsp();
                if (s4 === peg$FAILED) {
                  s4 = peg$c2;
                }
                if (s4 !== peg$FAILED) {
                  s5 = peg$parsecoordinate_pair();
                  if (s5 !== peg$FAILED) {
                    peg$reportedPos = s0;
                    s1 = peg$c23(s1, s3, s5);
                    s0 = s1;
                  } else {
                    peg$currPos = s0;
                    s0 = peg$c0;
                  }
                } else {
                  peg$currPos = s0;
                  s0 = peg$c0;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsesmooth_curveto() {
          var s0, s1, s2, s3;
    
          s0 = peg$currPos;
          if (peg$c24.test(input.charAt(peg$currPos))) {
            s1 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c25); }
          }
          if (s1 !== peg$FAILED) {
            s2 = [];
            s3 = peg$parsewsp();
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              s3 = peg$parsewsp();
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parsesmooth_curveto_argument_sequence();
              if (s3 !== peg$FAILED) {
                peg$reportedPos = s0;
                s1 = peg$c26(s1, s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsesmooth_curveto_argument_sequence() {
          var s0, s1, s2, s3, s4;
    
          s0 = peg$currPos;
          s1 = peg$parsesmooth_curveto_argument();
          if (s1 !== peg$FAILED) {
            s2 = peg$currPos;
            s3 = peg$parsecomma_wsp();
            if (s3 === peg$FAILED) {
              s3 = peg$c2;
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parsesmooth_curveto_argument_sequence();
              if (s4 !== peg$FAILED) {
                s3 = [s3, s4];
                s2 = s3;
              } else {
                peg$currPos = s2;
                s2 = peg$c0;
              }
            } else {
              peg$currPos = s2;
              s2 = peg$c0;
            }
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              peg$reportedPos = s0;
              s1 = peg$c7(s1, s2);
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsesmooth_curveto_argument() {
          var s0, s1, s2, s3;
    
          s0 = peg$currPos;
          s1 = peg$parsecoordinate_pair();
          if (s1 !== peg$FAILED) {
            s2 = peg$parsecomma_wsp();
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parsecoordinate_pair();
              if (s3 !== peg$FAILED) {
                peg$reportedPos = s0;
                s1 = peg$c27(s1, s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsequadratic_bezier_curveto() {
          var s0, s1, s2, s3;
    
          s0 = peg$currPos;
          if (peg$c28.test(input.charAt(peg$currPos))) {
            s1 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c29); }
          }
          if (s1 !== peg$FAILED) {
            s2 = [];
            s3 = peg$parsewsp();
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              s3 = peg$parsewsp();
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parsequadratic_bezier_curveto_argument_sequence();
              if (s3 !== peg$FAILED) {
                peg$reportedPos = s0;
                s1 = peg$c30(s1, s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsequadratic_bezier_curveto_argument_sequence() {
          var s0, s1, s2, s3, s4;
    
          s0 = peg$currPos;
          s1 = peg$parsequadratic_bezier_curveto_argument();
          if (s1 !== peg$FAILED) {
            s2 = peg$currPos;
            s3 = peg$parsecomma_wsp();
            if (s3 === peg$FAILED) {
              s3 = peg$c2;
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parsequadratic_bezier_curveto_argument_sequence();
              if (s4 !== peg$FAILED) {
                s3 = [s3, s4];
                s2 = s3;
              } else {
                peg$currPos = s2;
                s2 = peg$c0;
              }
            } else {
              peg$currPos = s2;
              s2 = peg$c0;
            }
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              peg$reportedPos = s0;
              s1 = peg$c7(s1, s2);
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsequadratic_bezier_curveto_argument() {
          var s0, s1, s2, s3;
    
          s0 = peg$currPos;
          s1 = peg$parsecoordinate_pair();
          if (s1 !== peg$FAILED) {
            s2 = peg$parsecomma_wsp();
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parsecoordinate_pair();
              if (s3 !== peg$FAILED) {
                peg$reportedPos = s0;
                s1 = peg$c27(s1, s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsesmooth_quadratic_bezier_curveto() {
          var s0, s1, s2, s3;
    
          s0 = peg$currPos;
          if (peg$c31.test(input.charAt(peg$currPos))) {
            s1 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c32); }
          }
          if (s1 !== peg$FAILED) {
            s2 = [];
            s3 = peg$parsewsp();
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              s3 = peg$parsewsp();
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parsesmooth_quadratic_bezier_curveto_argument_sequence();
              if (s3 !== peg$FAILED) {
                peg$reportedPos = s0;
                s1 = peg$c33(s1, s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsesmooth_quadratic_bezier_curveto_argument_sequence() {
          var s0, s1, s2, s3, s4;
    
          s0 = peg$currPos;
          s1 = peg$parsecoordinate_pair();
          if (s1 !== peg$FAILED) {
            s2 = peg$currPos;
            s3 = peg$parsecomma_wsp();
            if (s3 === peg$FAILED) {
              s3 = peg$c2;
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parsesmooth_quadratic_bezier_curveto_argument_sequence();
              if (s4 !== peg$FAILED) {
                s3 = [s3, s4];
                s2 = s3;
              } else {
                peg$currPos = s2;
                s2 = peg$c0;
              }
            } else {
              peg$currPos = s2;
              s2 = peg$c0;
            }
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              peg$reportedPos = s0;
              s1 = peg$c7(s1, s2);
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parseelliptical_arc() {
          var s0, s1, s2, s3;
    
          s0 = peg$currPos;
          if (peg$c34.test(input.charAt(peg$currPos))) {
            s1 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c35); }
          }
          if (s1 !== peg$FAILED) {
            s2 = [];
            s3 = peg$parsewsp();
            while (s3 !== peg$FAILED) {
              s2.push(s3);
              s3 = peg$parsewsp();
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parseelliptical_arc_argument_sequence();
              if (s3 !== peg$FAILED) {
                peg$reportedPos = s0;
                s1 = peg$c36(s1, s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parseelliptical_arc_argument_sequence() {
          var s0, s1, s2, s3, s4;
    
          s0 = peg$currPos;
          s1 = peg$parseelliptical_arc_argument();
          if (s1 !== peg$FAILED) {
            s2 = peg$currPos;
            s3 = peg$parsecomma_wsp();
            if (s3 === peg$FAILED) {
              s3 = peg$c2;
            }
            if (s3 !== peg$FAILED) {
              s4 = peg$parseelliptical_arc_argument_sequence();
              if (s4 !== peg$FAILED) {
                s3 = [s3, s4];
                s2 = s3;
              } else {
                peg$currPos = s2;
                s2 = peg$c0;
              }
            } else {
              peg$currPos = s2;
              s2 = peg$c0;
            }
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              peg$reportedPos = s0;
              s1 = peg$c7(s1, s2);
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parseelliptical_arc_argument() {
          var s0, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10, s11;
    
          s0 = peg$currPos;
          s1 = peg$parsenonnegative_number();
          if (s1 !== peg$FAILED) {
            s2 = peg$parsecomma_wsp();
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parsenonnegative_number();
              if (s3 !== peg$FAILED) {
                s4 = peg$parsecomma_wsp();
                if (s4 === peg$FAILED) {
                  s4 = peg$c2;
                }
                if (s4 !== peg$FAILED) {
                  s5 = peg$parsenumber();
                  if (s5 !== peg$FAILED) {
                    s6 = peg$parsecomma_wsp();
                    if (s6 !== peg$FAILED) {
                      s7 = peg$parseflag();
                      if (s7 !== peg$FAILED) {
                        s8 = peg$parsecomma_wsp();
                        if (s8 === peg$FAILED) {
                          s8 = peg$c2;
                        }
                        if (s8 !== peg$FAILED) {
                          s9 = peg$parseflag();
                          if (s9 !== peg$FAILED) {
                            s10 = peg$parsecomma_wsp();
                            if (s10 === peg$FAILED) {
                              s10 = peg$c2;
                            }
                            if (s10 !== peg$FAILED) {
                              s11 = peg$parsecoordinate_pair();
                              if (s11 !== peg$FAILED) {
                                peg$reportedPos = s0;
                                s1 = peg$c37(s1, s3, s5, s7, s9, s11);
                                s0 = s1;
                              } else {
                                peg$currPos = s0;
                                s0 = peg$c0;
                              }
                            } else {
                              peg$currPos = s0;
                              s0 = peg$c0;
                            }
                          } else {
                            peg$currPos = s0;
                            s0 = peg$c0;
                          }
                        } else {
                          peg$currPos = s0;
                          s0 = peg$c0;
                        }
                      } else {
                        peg$currPos = s0;
                        s0 = peg$c0;
                      }
                    } else {
                      peg$currPos = s0;
                      s0 = peg$c0;
                    }
                  } else {
                    peg$currPos = s0;
                    s0 = peg$c0;
                  }
                } else {
                  peg$currPos = s0;
                  s0 = peg$c0;
                }
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsecoordinate_pair() {
          var s0, s1, s2, s3;
    
          s0 = peg$currPos;
          s1 = peg$parsecoordinate();
          if (s1 !== peg$FAILED) {
            s2 = peg$parsecomma_wsp();
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parsecoordinate();
              if (s3 !== peg$FAILED) {
                peg$reportedPos = s0;
                s1 = peg$c38(s1, s3);
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsecoordinate() {
          var s0, s1;
    
          s0 = peg$currPos;
          s1 = peg$parsenumber();
          if (s1 !== peg$FAILED) {
            peg$reportedPos = s0;
            s1 = peg$c39(s1);
          }
          s0 = s1;
    
          return s0;
        }
    
        function peg$parsenonnegative_number() {
          var s0;
    
          s0 = peg$parsefloating_point_constant();
          if (s0 === peg$FAILED) {
            s0 = peg$parsedigit_sequence();
          }
    
          return s0;
        }
    
        function peg$parsenumber() {
          var s0, s1, s2;
    
          s0 = peg$currPos;
          s1 = peg$parsesign();
          if (s1 === peg$FAILED) {
            s1 = peg$c2;
          }
          if (s1 !== peg$FAILED) {
            s2 = peg$parsefloating_point_constant();
            if (s2 !== peg$FAILED) {
              s1 = [s1, s2];
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
          if (s0 === peg$FAILED) {
            s0 = peg$currPos;
            s1 = peg$parsesign();
            if (s1 === peg$FAILED) {
              s1 = peg$c2;
            }
            if (s1 !== peg$FAILED) {
              s2 = peg$parsedigit_sequence();
              if (s2 !== peg$FAILED) {
                s1 = [s1, s2];
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          }
    
          return s0;
        }
    
        function peg$parseflag() {
          var s0;
    
          if (input.charCodeAt(peg$currPos) === 48) {
            s0 = peg$c40;
            peg$currPos++;
          } else {
            s0 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c41); }
          }
          if (s0 === peg$FAILED) {
            if (input.charCodeAt(peg$currPos) === 49) {
              s0 = peg$c42;
              peg$currPos++;
            } else {
              s0 = peg$FAILED;
              if (peg$silentFails === 0) { peg$fail(peg$c43); }
            }
          }
    
          return s0;
        }
    
        function peg$parsecomma_wsp() {
          var s0, s1, s2, s3, s4;
    
          s0 = peg$currPos;
          s1 = [];
          s2 = peg$parsewsp();
          if (s2 !== peg$FAILED) {
            while (s2 !== peg$FAILED) {
              s1.push(s2);
              s2 = peg$parsewsp();
            }
          } else {
            s1 = peg$c0;
          }
          if (s1 !== peg$FAILED) {
            s2 = peg$parsecomma();
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              s3 = [];
              s4 = peg$parsewsp();
              while (s4 !== peg$FAILED) {
                s3.push(s4);
                s4 = peg$parsewsp();
              }
              if (s3 !== peg$FAILED) {
                s1 = [s1, s2, s3];
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
          if (s0 === peg$FAILED) {
            s0 = peg$currPos;
            s1 = peg$parsecomma();
            if (s1 !== peg$FAILED) {
              s2 = [];
              s3 = peg$parsewsp();
              while (s3 !== peg$FAILED) {
                s2.push(s3);
                s3 = peg$parsewsp();
              }
              if (s2 !== peg$FAILED) {
                s1 = [s1, s2];
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          }
    
          return s0;
        }
    
        function peg$parsecomma() {
          var s0;
    
          if (input.charCodeAt(peg$currPos) === 44) {
            s0 = peg$c44;
            peg$currPos++;
          } else {
            s0 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c45); }
          }
    
          return s0;
        }
    
        function peg$parsefloating_point_constant() {
          var s0, s1, s2;
    
          s0 = peg$currPos;
          s1 = peg$parsefractional_constant();
          if (s1 !== peg$FAILED) {
            s2 = peg$parseexponent();
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              s1 = [s1, s2];
              s0 = s1;
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
          if (s0 === peg$FAILED) {
            s0 = peg$currPos;
            s1 = peg$parsedigit_sequence();
            if (s1 !== peg$FAILED) {
              s2 = peg$parseexponent();
              if (s2 !== peg$FAILED) {
                s1 = [s1, s2];
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          }
    
          return s0;
        }
    
        function peg$parsefractional_constant() {
          var s0, s1, s2, s3;
    
          s0 = peg$currPos;
          s1 = peg$parsedigit_sequence();
          if (s1 === peg$FAILED) {
            s1 = peg$c2;
          }
          if (s1 !== peg$FAILED) {
            if (input.charCodeAt(peg$currPos) === 46) {
              s2 = peg$c46;
              peg$currPos++;
            } else {
              s2 = peg$FAILED;
              if (peg$silentFails === 0) { peg$fail(peg$c47); }
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parsedigit_sequence();
              if (s3 !== peg$FAILED) {
                s1 = [s1, s2, s3];
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
          if (s0 === peg$FAILED) {
            s0 = peg$currPos;
            s1 = peg$parsedigit_sequence();
            if (s1 !== peg$FAILED) {
              if (input.charCodeAt(peg$currPos) === 46) {
                s2 = peg$c46;
                peg$currPos++;
              } else {
                s2 = peg$FAILED;
                if (peg$silentFails === 0) { peg$fail(peg$c47); }
              }
              if (s2 !== peg$FAILED) {
                s1 = [s1, s2];
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          }
    
          return s0;
        }
    
        function peg$parseexponent() {
          var s0, s1, s2, s3;
    
          s0 = peg$currPos;
          if (peg$c48.test(input.charAt(peg$currPos))) {
            s1 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s1 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c49); }
          }
          if (s1 !== peg$FAILED) {
            s2 = peg$parsesign();
            if (s2 === peg$FAILED) {
              s2 = peg$c2;
            }
            if (s2 !== peg$FAILED) {
              s3 = peg$parsedigit_sequence();
              if (s3 !== peg$FAILED) {
                s1 = [s1, s2, s3];
                s0 = s1;
              } else {
                peg$currPos = s0;
                s0 = peg$c0;
              }
            } else {
              peg$currPos = s0;
              s0 = peg$c0;
            }
          } else {
            peg$currPos = s0;
            s0 = peg$c0;
          }
    
          return s0;
        }
    
        function peg$parsesign() {
          var s0;
    
          if (input.charCodeAt(peg$currPos) === 43) {
            s0 = peg$c50;
            peg$currPos++;
          } else {
            s0 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c51); }
          }
          if (s0 === peg$FAILED) {
            if (input.charCodeAt(peg$currPos) === 45) {
              s0 = peg$c52;
              peg$currPos++;
            } else {
              s0 = peg$FAILED;
              if (peg$silentFails === 0) { peg$fail(peg$c53); }
            }
          }
    
          return s0;
        }
    
        function peg$parsedigit_sequence() {
          var s0, s1, s2;
    
          s0 = peg$currPos;
          s1 = [];
          if (peg$c54.test(input.charAt(peg$currPos))) {
            s2 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s2 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c55); }
          }
          if (s2 !== peg$FAILED) {
            while (s2 !== peg$FAILED) {
              s1.push(s2);
              if (peg$c54.test(input.charAt(peg$currPos))) {
                s2 = input.charAt(peg$currPos);
                peg$currPos++;
              } else {
                s2 = peg$FAILED;
                if (peg$silentFails === 0) { peg$fail(peg$c55); }
              }
            }
          } else {
            s1 = peg$c0;
          }
          if (s1 !== peg$FAILED) {
            peg$reportedPos = s0;
            s1 = peg$c56(s1);
          }
          s0 = s1;
    
          return s0;
        }
    
        function peg$parsewsp() {
          var s0;
    
          if (peg$c57.test(input.charAt(peg$currPos))) {
            s0 = input.charAt(peg$currPos);
            peg$currPos++;
          } else {
            s0 = peg$FAILED;
            if (peg$silentFails === 0) { peg$fail(peg$c58); }
          }
    
          return s0;
        }
    
    
          // The last coordinate we are at in the path. In absolute coords.
          var lastCoord = [0, 0];
          // The last control point we encountered in the path. In absolute coords.
          var lastControl = [0, 0];
          // The list of operations we've parsed so far.
          var ops = [];
          // Have we parsed the first sub-path yet?
          var firstSubPath = true;
          // The letter of the last parsed command.
          var lastCh = '';

          // Flatten an array.
          function flatten(a) {
            var flat = [];
            for (var i = 0; i < a.length; i++) {
              if (a[i] instanceof Array) {
                flat.push.apply(flat, flatten(a[i]));
              } else {
                flat.push(a[i]);
              }
            }
            return flat;
          }

          // Convert a position into an absolute position.
          function makeAbsolute(c, coord) {
            if ('mlazhvcsqt'.indexOf(c) === -1) {
              lastCoord = coord;
            } else {
              lastCoord[0] += coord[0];
              lastCoord[1] += coord[1];
            }
            lastCh = c;
            return lastCoord.slice(0);
          }
    
          // Convert a sequence of coordinates into absolute coordinates.
          //
          // For arguments that take multiple coord pairs, such as bezier.
          function makeAbsoluteMultiple(c, seq) {
            var r = [];
            var lastPosCopy = lastCoord.slice(0);
            for (var i=0; i < seq.length; i+=2) {
              // Only the last point should update lastCoord.
              lastCoord = lastPosCopy.slice(0);
              var coord = makeAbsolute(c, seq.slice(i, i+2));
              r = r.concat(coord);
              // Record the last control point, it might be needed for
              // shorthand operations.
              if (i == seq.length-4) {
                lastControl = coord.slice(0);
              }
            }
            return r;
          }
    
          // Find the reflection of the last control point over
          // the last postion in the path.
          function makeReflected() {
            if ('CcSsQqTt'.indexOf(lastCh) == -1) {
              lastControl = lastCoord.slice(0);
            }
            // reflected = 2*lastCoord - lastControl
            // Note the result is absolute, not relative.
            var r = [0, 0];
            r[0] = 2*lastCoord[0] - lastControl[0];
            r[1] = 2*lastCoord[1] - lastControl[1];
            return r;
          }
    
          function makeAbsoluteFromX(c, x) {
            var coord = [x, 0];
            if (c == 'H') {
              coord[1] = lastCoord[1];
            }
            return makeAbsolute(c, coord);
          }
    
          function makeAbsoluteFromY(c, y) {
            var coord = [0, y];
            if (c == 'V') {
              coord[0] = lastCoord[0];
            }
            return makeAbsolute(c, coord);
          }
    
          function concatSequence(one, rest) {
            var r = [one];
            if (rest && rest.length > 1) {
              var rem = rest[1];
              for (var i = 0; i < rem.length; i++) {
                r.push(rem[i]);
              }
            }
            return r;
          }
    
          function mag(v) {
            return Math.sqrt(Math.pow(v[0], 2) + Math.pow(v[1], 2));
          }
    
          function dot(u, v) {
            return (u[0]*v[0] + u[1]*v[1]);
          }
    
          function ratio(u, v) {
            return dot(u,v) / (mag(u)*mag(v))
          }
    
          function angle(u, v) {
            var sign = 1.0;
            if ((u[0]*v[1] - u[1]*v[0]) < 0) {
              sign = -1.0;
            }
            return sign * Math.acos(ratio(u,v));
          }
    
          function rotClockwise(v, angle) {
            var cost = Math.cos(angle);
            var sint = Math.sin(angle);
            return [cost*v[0] + sint*v[1], -1 * sint*v[0] + cost*v[1]];
          }
    
          function rotCounterClockwise(v, angle) {
            var cost = Math.cos(angle);
            var sint = Math.sin(angle);
            return [cost*v[0] - sint*v[1], sint*v[0] + cost*v[1]];
          }
    
          function midPoint(u, v) {
            return [(u[0] - v[0])/2.0, (u[1] - v[1])/2.0];
          }
    
          function meanVec(u, v) {
            return [(u[0] + v[0])/2.0, (u[1] + v[1])/2.0];
          }
    
          function pointMul(u, v) {
            return [u[0]*v[0], u[1]*v[1]];
          }
    
          function scale(c, v) {
            return [c*v[0], c*v[1]];
          }
    
          function sum(u, v) {
            return [u[0] + v[0], u[1] + v[1]];
          }
    
          // Convert an SVG elliptical arc to a series of canvas commands.
          //
          // x1, x2: start and stop coordinates of the ellipse.
          // rx, ry: radii of the ellipse.
          // phi: rotation of the ellipse.
          // fA: large arc flag.
          // fS: sweep flag.
          function ellipseFromEllipticalArc(x1, rx, ry, phi, fA, fS, x2) {
            // Convert from endpoint to center parametrization, as detailed in:
            //   http://www.w3.org/TR/SVG/implnote.html#ArcImplementationNotes
            if (rx == 0 || ry == 0) {
              ops.push({type: 'lineTo', args: x2});
              return;
            }
            var phi = phi * (Math.PI / 180.0);
            rx = Math.abs(rx);
            ry = Math.abs(ry);
            var xPrime = rotClockwise(midPoint(x1, x2), phi);                // F.6.5.1
            var xPrime2 = pointMul(xPrime, xPrime);
            var rx2 = Math.pow(rx, 2);
            var ry2 = Math.pow(ry, 2);
    
            var lambda = Math.sqrt(xPrime2[0]/rx2 + xPrime2[1]/ry2);
            if (lambda > 1) {
              rx *= lambda;
              ry *= lambda;
              rx2 = Math.pow(rx, 2);
              ry2 = Math.pow(ry, 2);
            }
    
            var factor = Math.sqrt((rx2*ry2 - rx2*xPrime2[1] - ry2*xPrime2[0]) /
              (rx2*xPrime2[1] + ry2*xPrime2[0]));
            if (fA == fS) {
              factor *= -1.0;
            }
            var cPrime = scale(factor, [rx*xPrime[1]/ry, -ry*xPrime[0]/rx]); // F.6.5.2
            var c = sum(rotCounterClockwise(cPrime, phi), meanVec(x1, x2));  // F.6.5.3
            var x1UnitVector = [(xPrime[0] - cPrime[0])/rx, (xPrime[1] - cPrime[1])/ry];
            var x2UnitVector = [(-1.0*xPrime[0] - cPrime[0])/rx, (-1.0*xPrime[1] - cPrime[1])/ry];
            var theta = angle([1, 0], x1UnitVector);                         // F.6.5.5
            var deltaTheta = angle(x1UnitVector, x2UnitVector);              // F.6.5.6
            var start = theta;
            var end = theta+deltaTheta;
            ops.push(
              {type: 'save', args: []},
              {type: 'translate', args: [c[0], c[1]]},
              {type: 'rotate', args: [phi]},
              {type: 'scale', args: [rx, ry]},
              {type: 'arc', args: [0, 0, 1, start, end, 1-fS]},
              {type: 'restore', args: []}
              );
          }
    
    
        peg$result = peg$startRuleFunction();
    
        if (peg$result !== peg$FAILED && peg$currPos === input.length) {
          return peg$result;
        } else {
          if (peg$result !== peg$FAILED && peg$currPos < input.length) {
            peg$fail({ type: "end", description: "end of input" });
          }
    
          throw peg$buildException(null, peg$maxFailExpected, peg$maxFailPos);
        }
      }
    
      return {
        SyntaxError: SyntaxError,
        parse:       parse
      };
    })();

    function Path_(arg) {
      this.ops_ = [];
      if (arg == undefined) {
        return;
      }
      if (typeof arg == 'string') {
        try {
          this.ops_ = parser.parse(arg);
        } catch(e) {
          // Treat an invalid SVG path as an empty path.
        }
      } else if (arg.hasOwnProperty('ops_')) {
        this.ops_ = arg.ops_.slice(0);
      } else {
        throw 'Error: ' + typeof arg + 'is not a valid argument to Path';
      }
    };

    // TODO(jcgregorio) test for arcTo and implement via something.


    // Path methods that map simply to the CanvasRenderingContext2D.
    var simple_mapping = [
      'closePath',
      'moveTo',
      'lineTo',
      'quadraticCurveTo',
      'bezierCurveTo',
      'rect',
      'arc',
      'arcTo',
      'ellipse',
      'isPointInPath',
      'isPointInStroke',
      ];

    function createFunction(name) {
      return function() {
        this.ops_.push({type: name, args: Array.prototype.slice.call(arguments, 0)});
      };
    }

    // Add simple_mapping methods to Path2D.
    for (var i=0; i<simple_mapping.length; i++) {
      var name = simple_mapping[i];
      Path_.prototype[name] = createFunction(name);
    }

    Path_.prototype['addPath'] = function(path, tr) {
      var hasTx = false;
      if (tr
          && tr.hasOwnProperty('a')
          && tr.hasOwnProperty('b')
          && tr.hasOwnProperty('c')
          && tr.hasOwnProperty('d')
          && tr.hasOwnProperty('e')
          && tr.hasOwnProperty('f')) {
        hasTx = true;
        this.ops_.push({type: 'save', args: []});
        this.ops_.push({type: 'transform', args: [tr.a, tr.b, tr.c, tr.d, tr.e, tr.f]});
      }
      this.ops_ = this.ops_.concat(path.ops_);
      if (hasTx) {
        this.ops_.push({type: 'restore', args: []});
      }
    }

    original_fill = CanvasRenderingContext2D.prototype.fill;
    original_stroke = CanvasRenderingContext2D.prototype.stroke;
    original_clip = CanvasRenderingContext2D.prototype.clip;
    original_is_point_in_path = CanvasRenderingContext2D.prototype.isPointInPath;
    original_is_point_in_stroke = CanvasRenderingContext2D.prototype.isPointInStroke;

    // Replace methods on CanvasRenderingContext2D with ones that understand Path2D.
    CanvasRenderingContext2D.prototype.fill = function(arg) {
      if (arg instanceof Path_) {
        this.beginPath();
        for (var i = 0, len = arg.ops_.length; i < len; i++) {
          var op = arg.ops_[i];
          CanvasRenderingContext2D.prototype[op.type].apply(this, op.args);
        }
        original_fill.apply(this, Array.prototype.slice.call(arguments, 1));
      } else {
        original_fill.apply(this, arguments);
      }
    }

    CanvasRenderingContext2D.prototype.stroke = function(arg) {
      if (arg instanceof Path_) {
        this.beginPath();
        for (var i = 0, len = arg.ops_.length; i < len; i++) {
          var op = arg.ops_[i];
          CanvasRenderingContext2D.prototype[op.type].apply(this, op.args);
        }
        original_stroke.call(this);
      } else {
        original_stroke.call(this);
      }
    }

    CanvasRenderingContext2D.prototype.clip = function(arg) {
      if (arg instanceof Path_) {
        // Note that we don't save and restore the context state, since the
        // clip region is part of the state. Not really a problem since the
        // HTML 5 spec doesn't say that clip(path) doesn't affect the current
        // path.
        this.beginPath();
        for (var i = 0, len = arg.ops_.length; i < len; i++) {
          var op = arg.ops_[i];
          CanvasRenderingContext2D.prototype[op.type].apply(this, op.args);
        }
        original_clip.apply(this, Array.prototype.slice.call(arguments, 1));
      } else {
        original_clip.apply(this, arguments);
      }
    }

    CanvasRenderingContext2D.prototype.isPointInPath = function(arg) {
      if (arg instanceof Path_) {
        this.beginPath();
        for (var i = 0, len = arg.ops_.length; i < len; i++) {
          var op = arg.ops_[i];
          CanvasRenderingContext2D.prototype[op.type].apply(this, op.args);
        }
        return original_is_point_in_path.apply(this, Array.prototype.slice.call(arguments, 1));
      } else {
        return original_is_point_in_path.apply(this, arguments);
      }
    }
    CanvasRenderingContext2D.prototype.isPointInStroke = function(arg) {
      if (arg instanceof Path_) {
        this.beginPath();
        for (var i = 0, len = arg.ops_.length; i < len; i++) {
          var op = arg.ops_[i];
          CanvasRenderingContext2D.prototype[op.type].apply(this, op.args);
        }
        return original_is_point_in_stroke.apply(this, Array.prototype.slice.call(arguments, 1));
      } else {
        return original_is_point_in_stroke.apply(this, arguments);
      }
    }

    // Set up externs.
    Path2D = Path_;
  })();
}