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/**
* jsPDF Context2D PlugIn Copyright (c) 2014 Steven Spungin (TwelveTone LLC) steven@twelvetone.tv
*
* Licensed under the MIT License. http://opensource.org/licenses/mit-license
*/
/**
* This plugin mimics the HTML5 Canvas's context2d.
*
* The goal is to provide a way for current canvas implementations to print directly to a PDF.
*/
/**
* TODO implement stroke opacity (refactor from fill() method )
* TODO transform angle and radii parameters
*/
/**
* require('jspdf.js'); require('lib/css_colors.js');
*/
(function (jsPDFAPI) {
'use strict';
jsPDFAPI.events.push([
'initialized', function () {
this.context2d.pdf = this;
this.context2d.internal.pdf = this;
this.context2d.ctx = new context();
this.context2d.ctxStack = [];
this.context2d.path = [];
}
]);
jsPDFAPI.context2d = {
pageWrapXEnabled: false,
pageWrapYEnabled: false,
pageWrapX: 9999999,
pageWrapY: 9999999,
ctx: new context(),
f2: function (number) {
return number.toFixed(2);
},
fillRect: function (x, y, w, h) {
if (this._isFillTransparent()) {
return;
}
x = this._wrapX(x);
y = this._wrapY(y);
var xRect = this._matrix_map_rect(this.ctx._transform, {x: x, y: y, w: w, h: h});
this.pdf.rect(xRect.x, xRect.y, xRect.w, xRect.h, "f");
},
strokeRect: function (x, y, w, h) {
if (this._isStrokeTransparent()) {
return;
}
x = this._wrapX(x);
y = this._wrapY(y);
var xRect = this._matrix_map_rect(this.ctx._transform, {x: x, y: y, w: w, h: h});
this.pdf.rect(xRect.x, xRect.y, xRect.w, xRect.h, "s");
},
/**
* We cannot clear PDF commands that were already written to PDF, so we use white instead. <br />
* As a special case, read a special flag (ignoreClearRect) and do nothing if it is set.
* This results in all calls to clearRect() to do nothing, and keep the canvas transparent.
* This flag is stored in the save/restore context and is managed the same way as other drawing states.
* @param x
* @param y
* @param w
* @param h
*/
clearRect: function (x, y, w, h) {
if (this.ctx.ignoreClearRect) {
return;
}
x = this._wrapX(x);
y = this._wrapY(y);
var xRect = this._matrix_map_rect(this.ctx._transform, {x: x, y: y, w: w, h: h});
this.save();
this.setFillStyle('#ffffff');
//TODO This is hack to fill with white.
this.pdf.rect(xRect.x, xRect.y, xRect.w, xRect.h, "f");
this.restore();
},
save: function () {
this.ctx._fontSize = this.pdf.internal.getFontSize();
var ctx = new context();
ctx.copy(this.ctx);
this.ctxStack.push(this.ctx);
this.ctx = ctx;
},
restore: function () {
this.ctx = this.ctxStack.pop();
this.setFillStyle(this.ctx.fillStyle);
this.setStrokeStyle(this.ctx.strokeStyle);
this.setFont(this.ctx.font);
this.pdf.setFontSize(this.ctx._fontSize);
this.setLineCap(this.ctx.lineCap);
this.setLineWidth(this.ctx.lineWidth);
this.setLineJoin(this.ctx.lineJoin);
},
rect: function (x, y, w, h) {
this.moveTo(x, y);
this.lineTo(x + w, y);
this.lineTo(x + w, y + h);
this.lineTo(x, y + h);
this.lineTo(x, y); //TODO not needed
this.closePath();
},
beginPath: function () {
this.path = [];
},
closePath: function () {
this.path.push({
type: 'close'
});
},
_getRgba: function (style) {
// get the decimal values of r, g, and b;
var rgba = {};
if (this.internal.rxTransparent.test(style)) {
rgba.r = 0;
rgba.g = 0;
rgba.b = 0;
rgba.a = 0;
}
else {
var m = this.internal.rxRgb.exec(style);
if (m != null) {
rgba.r = parseInt(m[1]);
rgba.g = parseInt(m[2]);
rgba.b = parseInt(m[3]);
rgba.a = 1;
} else {
m = this.internal.rxRgba.exec(style);
if (m != null) {
rgba.r = parseInt(m[1]);
rgba.g = parseInt(m[2]);
rgba.b = parseInt(m[3]);
rgba.a = parseFloat(m[4]);
} else {
rgba.a = 1;
if (style.charAt(0) != '#') {
style = CssColors.colorNameToHex(style);
if (!style) {
style = '#000000';
}
} else {
}
if (style.length === 4) {
rgba.r = style.substring(1, 2);
rgba.r += r;
rgba.g = style.substring(2, 3);
rgba.g += g;
rgba.b = style.substring(3, 4);
rgba.b += b;
} else {
rgba.r = style.substring(1, 3);
rgba.g = style.substring(3, 5);
rgba.b = style.substring(5, 7);
}
rgba.r = parseInt(rgba.r, 16);
rgba.g = parseInt(rgba.g, 16);
rgba.b = parseInt(rgba.b, 16);
}
}
}
rgba.style = style;
return rgba;
},
setFillStyle: function (style) {
// get the decimal values of r, g, and b;
var r, g, b, a;
if (this.internal.rxTransparent.test(style)) {
r = 0;
g = 0;
b = 0;
a = 0;
}
else {
var m = this.internal.rxRgb.exec(style);
if (m != null) {
r = parseInt(m[1]);
g = parseInt(m[2]);
b = parseInt(m[3]);
a = 1;
} else {
m = this.internal.rxRgba.exec(style);
if (m != null) {
r = parseInt(m[1]);
g = parseInt(m[2]);
b = parseInt(m[3]);
a = parseFloat(m[4]);
} else {
a = 1;
if (style.charAt(0) != '#') {
style = CssColors.colorNameToHex(style);
if (!style) {
style = '#000000';
}
} else {
}
if (style.length === 4) {
r = style.substring(1, 2);
r += r;
g = style.substring(2, 3);
g += g;
b = style.substring(3, 4);
b += b;
} else {
r = style.substring(1, 3);
g = style.substring(3, 5);
b = style.substring(5, 7);
}
r = parseInt(r, 16);
g = parseInt(g, 16);
b = parseInt(b, 16);
}
}
}
this.ctx.fillStyle = style;
this.ctx._isFillTransparent = (a == 0);
this.ctx._fillOpacity = a;
this.pdf.setFillColor(r, g, b, {
a: a
});
this.pdf.setTextColor(r, g, b, {
a: a
});
},
setStrokeStyle: function (style) {
var rgba = this._getRgba(style);
this.ctx.strokeStyle = rgba.style;
this.ctx._isStrokeTransparent = (rgba.a == 0);
this.ctx._strokeOpacity = rgba.a;
//TODO jsPDF to handle rgba
if (rgba.a === 0) {
this.pdf.setDrawColor(255, 255, 255);
}
else if (rgba.a === 1) {
this.pdf.setDrawColor(rgba.r, rgba.g, rgba.b);
} else {
//this.pdf.setDrawColor(rgba.r, rgba.g, rgba.b, {a: rgba.a});
this.pdf.setDrawColor(rgba.r, rgba.g, rgba.b);
}
},
fillText: function (text, x, y, maxWidth) {
if (this._isFillTransparent()) {
return;
}
x = this._wrapX(x);
y = this._wrapY(y);
var xpt = this._matrix_map_point(this.ctx._transform, [x, y]);
x = xpt[0];
y = xpt[1];
var rads = this._matrix_rotation(this.ctx._transform);
var degs = rads * 57.2958;
//TODO only push the clip if it has not been applied to the current PDF context
if (this.ctx._clip_path.length > 0) {
var lines;
if (window.outIntercept) {
lines = window.outIntercept.type === 'group' ? window.outIntercept.stream : window.outIntercept;
} else {
lines = this.internal.getCurrentPage();
}
lines.push("q");
var origPath = this.path;
this.path = this.ctx._clip_path;
this.ctx._clip_path = [];
this._fill(null, true);
this.ctx._clip_path = this.path;
this.path = origPath;
}
this.pdf.text(text, x, this._getBaseline(y), null, degs);
if (this.ctx._clip_path.length > 0) {
lines.push('Q');
}
},
strokeText: function (text, x, y, maxWidth) {
if (this._isStrokeTransparent()) {
return;
}
x = this._wrapX(x);
y = this._wrapY(y);
var xpt = this._matrix_map_point(this.ctx._transform, [x, y]);
x = xpt[0];
y = xpt[1];
var rads = this._matrix_rotation(this.ctx._transform);
var degs = rads * 57.2958;
//TODO only push the clip if it has not been applied to the current PDF context
if (this.ctx._clip_path.length > 0) {
var lines;
if (window.outIntercept) {
lines = window.outIntercept.type === 'group' ? window.outIntercept.stream : window.outIntercept;
} else {
lines = this.internal.getCurrentPage();
}
lines.push("q");
var origPath = this.path;
this.path = this.ctx._clip_path;
this.ctx._clip_path = [];
this._fill(null, true);
this.ctx._clip_path = this.path;
this.path = origPath;
}
this.pdf.text(text, x, this._getBaseline(y), {
stroke: true
}, degs);
if (this.ctx._clip_path.length > 0) {
lines.push('Q');
}
},
setFont: function (font) {
this.ctx.font = font;
//var rx = /\s*(\w+)\s+(\w+)\s+(\w+)\s+([\d\.]+)(px|pt|em)\s+["']?(\w+)['"]?/;
var rx = /\s*(\w+)\s+(\w+)\s+(\w+)\s+([\d\.]+)(px|pt|em)\s+(.*)?/;
m = rx.exec(font);
if (m != null) {
var fontStyle = m[1];
var fontVariant = m[2];
var fontWeight = m[3];
var fontSize = m[4];
var fontSizeUnit = m[5];
var fontFamily = m[6];
if ('px' === fontSizeUnit) {
fontSize = Math.floor(parseFloat(fontSize));
// fontSize = fontSize * 1.25;
} else if ('em' === fontSizeUnit) {
fontSize = Math.floor(parseFloat(fontSize) * this.pdf.getFontSize());
} else {
fontSize = Math.floor(parseFloat(fontSize));
}
this.pdf.setFontSize(fontSize);
if (fontWeight === 'bold' || fontWeight === '700') {
this.pdf.setFontStyle('bold');
} else {
if (fontStyle === 'italic') {
this.pdf.setFontStyle('italic');
} else {
this.pdf.setFontStyle('normal');
}
}
var name = fontFamily;
var parts = name.toLowerCase().split(/\s*,\s*/);
var jsPdfFontName;
if (parts.indexOf('arial') != -1) {
jsPdfFontName = 'Arial';
}
else if (parts.indexOf('verdana') != -1) {
jsPdfFontName = 'Verdana';
}
else if (parts.indexOf('helvetica') != -1) {
jsPdfFontName = 'Helvetica';
}
else if (parts.indexOf('sans-serif') != -1) {
jsPdfFontName = 'sans-serif';
}
else if (parts.indexOf('fixed') != -1) {
jsPdfFontName = 'Fixed';
}
else if (parts.indexOf('monospace') != -1) {
jsPdfFontName = 'Monospace';
}
else if (parts.indexOf('terminal') != -1) {
jsPdfFontName = 'Terminal';
}
else if (parts.indexOf('courier') != -1) {
jsPdfFontName = 'Courier';
}
else if (parts.indexOf('times') != -1) {
jsPdfFontName = 'Times';
}
else if (parts.indexOf('cursive') != -1) {
jsPdfFontName = 'Cursive';
}
else if (parts.indexOf('fantasy') != -1) {
jsPdfFontName = 'Fantasy';
}
else if (parts.indexOf('serif') != -1) {
jsPdfFontName = 'Serif';
}
else {
jsPdfFontName = 'Serif';
}
//TODO check more cases
var style;
if ('bold' === fontWeight) {
style = 'bold';
} else {
style = 'normal';
}
this.pdf.setFont(jsPdfFontName, style);
} else {
var rx = /(\d+)(pt|px|em)\s+(\w+)\s*(\w+)?/;
var m = rx.exec(font);
if (m != null) {
var size = m[1];
var unit = m[2];
var name = m[3];
var style = m[4];
if (!style) {
style = 'normal';
}
if ('em' === fontSizeUnit) {
size = Math.floor(parseFloat(fontSize) * this.pdf.getFontSize());
} else {
size = Math.floor(parseFloat(size));
}
this.pdf.setFontSize(size);
this.pdf.setFont(name, style);
}
}
},
setTextBaseline: function (baseline) {
this.ctx.textBaseline = baseline;
},
getTextBaseline: function () {
return this.ctx.textBaseline;
},
//TODO implement textAlign
setTextAlign: function (align) {
this.ctx.textAlign = align;
},
getTextAlign: function () {
return this.ctx.textAlign;
},
setLineWidth: function (width) {
this.ctx.lineWidth = width;
this.pdf.setLineWidth(width);
},
setLineCap: function (style) {
this.ctx.lineCap = style;
this.pdf.setLineCap(style);
},
setLineJoin: function (style) {
this.ctx.lineJoin = style;
this.pdf.setLineJoin(style);
},
moveTo: function (x, y) {
x = this._wrapX(x);
y = this._wrapY(y);
var xpt = this._matrix_map_point(this.ctx._transform, [x, y]);
x = xpt[0];
y = xpt[1];
var obj = {
type: 'mt',
x: x,
y: y
};
this.path.push(obj);
},
_wrapX: function (x) {
if (this.pageWrapXEnabled) {
return x % this.pageWrapX;
} else {
return x;
}
},
_wrapY: function (y) {
if (this.pageWrapYEnabled) {
this._gotoPage(this._page(y));
return (y - this.lastBreak) % this.pageWrapY;
} else {
return y;
}
},
transform: function (a, b, c, d, e, f) {
//TODO apply to current transformation instead of replacing
this.ctx._transform = [a, b, c, d, e, f];
},
setTransform: function (a, b, c, d, e, f) {
this.ctx._transform = [a, b, c, d, e, f];
},
_getTransform: function () {
return this.ctx._transform;
},
lastBreak: 0,
// Y Position of page breaks.
pageBreaks: [],
// returns: One-based Page Number
// Should only be used if pageWrapYEnabled is true
_page: function (y) {
if (this.pageWrapYEnabled) {
this.lastBreak = 0;
var manualBreaks = 0;
var autoBreaks = 0;
for (var i = 0; i < this.pageBreaks.length; i++) {
if (y >= this.pageBreaks[i]) {
manualBreaks++;
if (this.lastBreak === 0) {
autoBreaks++;
}
var spaceBetweenLastBreak = this.pageBreaks[i] - this.lastBreak;
this.lastBreak = this.pageBreaks[i];
var pagesSinceLastBreak = Math.floor(spaceBetweenLastBreak / this.pageWrapY);
autoBreaks += pagesSinceLastBreak;
}
}
if (this.lastBreak === 0) {
var pagesSinceLastBreak = Math.floor(y / this.pageWrapY) + 1;
autoBreaks += pagesSinceLastBreak;
}
return autoBreaks + manualBreaks;
} else {
return this.pdf.internal.getCurrentPageInfo().pageNumber;
}
},
_gotoPage: function (pageOneBased) {
// This is a stub to be overriden if needed
},
lineTo: function (x, y) {
x = this._wrapX(x);
y = this._wrapY(y);
var xpt = this._matrix_map_point(this.ctx._transform, [x, y]);
x = xpt[0];
y = xpt[1];
var obj = {
type: 'lt',
x: x,
y: y
};
this.path.push(obj);
},
bezierCurveTo: function (x1, y1, x2, y2, x, y) {
x1 = this._wrapX(x1);
y1 = this._wrapY(y1);
x2 = this._wrapX(x2);
y2 = this._wrapY(y2);
x = this._wrapX(x);
y = this._wrapY(y);
var xpt;
xpt = this._matrix_map_point(this.ctx._transform, [x, y]);
x = xpt[0];
y = xpt[1];
xpt = this._matrix_map_point(this.ctx._transform, [x1, y1]);
x1 = xpt[0];
y1 = xpt[1];
xpt = this._matrix_map_point(this.ctx._transform, [x2, y2]);
x2 = xpt[0];
y2 = xpt[1];
var obj = {
type: 'bct',
x1: x1,
y1: y1,
x2: x2,
y2: y2,
x: x,
y: y
};
this.path.push(obj);
},
quadraticCurveTo: function (x1, y1, x, y) {
x1 = this._wrapX(x1);
y1 = this._wrapY(y1);
x = this._wrapX(x);
y = this._wrapY(y);
var xpt;
xpt = this._matrix_map_point(this.ctx._transform, [x, y]);
x = xpt[0];
y = xpt[1];
xpt = this._matrix_map_point(this.ctx._transform, [x1, y1]);
x1 = xpt[0];
y1 = xpt[1];
var obj = {
type: 'qct',
x1: x1,
y1: y1,
x: x,
y: y
};
this.path.push(obj);
},
arc: function (x, y, radius, startAngle, endAngle, anticlockwise) {
x = this._wrapX(x);
y = this._wrapY(y);
var xpt = this._matrix_map_point(this.ctx._transform, [x, y]);
x = xpt[0];
y = xpt[1];
var obj = {
type: 'arc',
x: x,
y: y,
radius: radius,
startAngle: startAngle,
endAngle: endAngle,
anticlockwise: anticlockwise
};
this.path.push(obj);
},
drawImage: function (img, x, y, w, h, x2, y2, w2, h2) {
if (x2 !== undefined) {
x = x2;
y = y2;
w = w2;
h = h2;
}
x = this._wrapX(x);
y = this._wrapY(y);
var xRect = this._matrix_map_rect(this.ctx._transform, {x: x, y: y, w: w, h: h});
var xRect2 = this._matrix_map_rect(this.ctx._transform, {x: x2, y: y2, w: w2, h: h2});
// TODO implement source clipping and image scaling
var format;
var rx = /data:image\/(\w+).*/i;
var m = rx.exec(img);
if (m != null) {
format = m[1];
} else {
// format = "jpeg";
format = "png";
}
this.pdf.addImage(img, format, xRect.x, xRect.y, xRect.w, xRect.h);
},
/**
* Multiply the first matrix by the second
* @param m1
* @param m2
* @returns {*[]}
* @private
*/
_matrix_multiply: function (m2, m1) {
var sx = m1[0];
var shy = m1[1];
var shx = m1[2];
var sy = m1[3];
var tx = m1[4];
var ty = m1[5];
var t0 = sx * m2[0] + shy * m2[2];
var t2 = shx * m2[0] + sy * m2[2];
var t4 = tx * m2[0] + ty * m2[2] + m2[4];
shy = sx * m2[1] + shy * m2[3];
sy = shx * m2[1] + sy * m2[3];
ty = tx * m2[1] + ty * m2[3] + m2[5];
sx = t0;
shx = t2;
tx = t4;
return [sx, shy, shx, sy, tx, ty];
},
_matrix_rotation: function (m) {
return Math.atan2(m[2], m[0]);
},
_matrix_decompose: function (matrix) {
var a = matrix[0];
var b = matrix[1];
var c = matrix[2];
var d = matrix[3];
var scaleX = Math.sqrt(a * a + b * b);
a /= scaleX;
b /= scaleX;
var shear = a * c + b * d;
c -= a * shear;
d -= b * shear;
var scaleY = Math.sqrt(c * c + d * d);
c /= scaleY;
d /= scaleY;
shear /= scaleY;
if (a * d < b * c) {
a = -a;
b = -b;
shear = -shear;
scaleX = -scaleX;
}
return {
scale: [scaleX, 0, 0, scaleY, 0, 0],
translate: [1, 0, 0, 1, matrix[4], matrix[5]],
rotate: [a, b, -b, a, 0, 0],
skew: [1, 0, shear, 1, 0, 0]
};
},
_matrix_map_point: function (m1, pt) {
var sx = m1[0];
var shy = m1[1];
var shx = m1[2];
var sy = m1[3];
var tx = m1[4];
var ty = m1[5];
var px = pt[0];
var py = pt[1];
var x = px * sx + py * shx + tx;
var y = px * shy + py * sy + ty;
return [x, y];
},
_matrix_map_point_obj: function (m1, pt) {
var xpt = this._matrix_map_point(m1, [pt.x, pt.y]);
return {x: xpt[0], y: xpt[1]};
},
_matrix_map_rect: function (m1, rect) {
var p1 = this._matrix_map_point(m1, [rect.x, rect.y]);
var p2 = this._matrix_map_point(m1, [rect.x + rect.w, rect.y + rect.h]);
return {x: p1[0], y: p1[1], w: p2[0] - p1[0], h: p2[1] - p1[1]};
},
_matrix_is_identity: function (m1) {
if (m1[0] != 1) {
return false;
}
if (m1[1] != 0) {
return false;
}
if (m1[2] != 0) {
return false;
}
if (m1[3] != 1) {
return false;
}
if (m1[4] != 0) {
return false;
}
if (m1[5] != 0) {
return false;
}
return true;
},
rotate: function (angle) {
var matrix = [Math.cos(angle), Math.sin(angle), -Math.sin(angle), Math.cos(angle), 0.0, 0.0];
this.ctx._transform = this._matrix_multiply(this.ctx._transform, matrix);
},
scale: function (sx, sy) {
var matrix = [sx, 0.0, 0.0, sy, 0.0, 0.0];
this.ctx._transform = this._matrix_multiply(this.ctx._transform, matrix);
},
translate: function (x, y) {
var matrix = [1.0, 0.0, 0.0, 1.0, x, y];
this.ctx._transform = this._matrix_multiply(this.ctx._transform, matrix);
},
stroke: function () {
if (this.ctx._clip_path.length > 0) {
var lines;
if (window.outIntercept) {
lines = window.outIntercept.type === 'group' ? window.outIntercept.stream : window.outIntercept;
} else {
lines = this.internal.getCurrentPage();
}
lines.push("q");
var origPath = this.path;
this.path = this.ctx._clip_path;
this.ctx._clip_path = [];
this._stroke(true);
this.ctx._clip_path = this.path;
this.path = origPath;
this._stroke(false);
lines.push("Q");
} else {
this._stroke(false);
}
},
_stroke: function (isClip) {
if (!isClip && this._isStrokeTransparent()) {
return;
}
//TODO opacity
var moves = [];
var closed = false;
var xPath = this.path;
for (var i = 0; i < xPath.length; i++) {
var pt = xPath[i];
switch (pt.type) {
case 'mt':
moves.push({start: pt, deltas: [], abs: []});
break;
case 'lt':
var delta = [
pt.x - xPath[i - 1].x, pt.y - xPath[i - 1].y
];
moves[moves.length - 1].deltas.push(delta);
moves[moves.length - 1].abs.push(pt);
break;
case 'bct':
var delta = [
pt.x1 - xPath[i - 1].x, pt.y1 - xPath[i - 1].y,
pt.x2 - xPath[i - 1].x, pt.y2 - xPath[i - 1].y,
pt.x - xPath[i - 1].x, pt.y - xPath[i - 1].y
];
moves[moves.length - 1].deltas.push(delta);
break;
case 'qct':
// convert to bezier
var x1 = xPath[i - 1].x + 2.0 / 3.0 * (pt.x1 - xPath[i - 1].x);
var y1 = xPath[i - 1].y + 2.0 / 3.0 * (pt.y1 - xPath[i - 1].y);
var x2 = pt.x + 2.0 / 3.0 * (pt.x1 - pt.x);
var y2 = pt.y + 2.0 / 3.0 * (pt.y1 - pt.y);
var x3 = pt.x;
var y3 = pt.y;
var delta = [
x1 - xPath[i - 1].x, y1 - xPath[i - 1].y,
x2 - xPath[i - 1].x, y2 - xPath[i - 1].y,
x3 - xPath[i - 1].x, y3 - xPath[i - 1].y
];
moves[moves.length - 1].deltas.push(delta);
break;
case 'arc':
moves[moves.length - 1].arc = true;
moves[moves.length - 1].abs.push(pt);
break;
case 'close':
closed = true;
break;
}
}
for (var i = 0; i < moves.length; i++) {
var style;
if (i == moves.length - 1) {
style = 's';
} else {
style = null;
}
if (moves[i].arc) {
var arcs = moves[i].abs;
for (var ii = 0; ii < arcs.length; ii++) {
var arc = arcs[ii];
var start = arc.startAngle * 360 / (2 * Math.PI);
var end = arc.endAngle * 360 / (2 * Math.PI);
var x = arc.x;
var y = arc.y;
this.internal.arc2(this, x, y, arc.radius, start, end, arc.anticlockwise, style, isClip);
}
} else {
var x = moves[i].start.x;
var y = moves[i].start.y;
if (!isClip) {
this.pdf.lines(moves[i].deltas, x, y, null, style);
} else {
this.pdf.lines(moves[i].deltas, x, y, null, null);
this.pdf.clip_fixed();
}
}
}
},
_isFillTransparent: function () {
return this.ctx._isFillTransparent || this.globalAlpha == 0;
},
_isStrokeTransparent: function () {
return this.ctx._isStrokeTransparent || this.globalAlpha == 0;
},
fill: function (fillRule) { //evenodd or nonzero (default)
if (this.ctx._clip_path.length > 0) {
var lines;
if (window.outIntercept) {
lines = window.outIntercept.type === 'group' ? window.outIntercept.stream : window.outIntercept;
} else {
lines = this.internal.getCurrentPage();
}
lines.push("q");
var origPath = this.path;
this.path = this.ctx._clip_path;
this.ctx._clip_path = [];
this._fill(fillRule, true);
this.ctx._clip_path = this.path;
this.path = origPath;
this._fill(fillRule, false);
lines.push('Q');
} else {
this._fill(fillRule, false);
}
},
_fill: function (fillRule, isClip) {
if (this._isFillTransparent()) {
return;
}
var v2Support = typeof this.pdf.internal.newObject2 === 'function';
var lines;
if (window.outIntercept) {
lines = window.outIntercept.type === 'group' ? window.outIntercept.stream : window.outIntercept;
} else {
lines = this.internal.getCurrentPage();
}
// if (this.ctx._clip_path.length > 0) {
// lines.push('q');
// var oldPath = this.path;
// this.path = this.ctx._clip_path;
// this.ctx._clip_path = [];
// this._fill(fillRule, true);
// this.ctx._clip_path = this.path;
// this.path = oldPath;
// }
var moves = [];
var outInterceptOld = window.outIntercept;
if (v2Support) {
// Blend and Mask
switch (this.ctx.globalCompositeOperation) {
case 'normal':
case 'source-over':
break;
case 'destination-in':
case 'destination-out':
//TODO this need to be added to the current group or page
// define a mask stream
var obj = this.pdf.internal.newStreamObject();
// define a mask state
var obj2 = this.pdf.internal.newObject2();
obj2.push('<</Type /ExtGState');
obj2.push('/SMask <</S /Alpha /G ' + obj.objId + ' 0 R>>'); // /S /Luminosity will need to define color space
obj2.push('>>');
// add mask to page resources
var gsName = 'MASK' + obj2.objId;
this.pdf.internal.addGraphicsState(gsName, obj2.objId);
var instruction = '/' + gsName + ' gs';
// add mask to page, group, or stream
lines.splice(0, 0, 'q');
lines.splice(1, 0, instruction);
lines.push('Q');
window.outIntercept = obj;
break;
default:
var dictionaryEntry = '/' + this.pdf.internal.blendModeMap[this.ctx.globalCompositeOperation.toUpperCase()];
if (dictionaryEntry) {
this.pdf.internal.out(dictionaryEntry + ' gs');
}
break;
}
}
var alpha = this.ctx.globalAlpha;
if (this.ctx._fillOpacity < 1) {
// TODO combine this with global opacity
alpha = this.ctx._fillOpacity;
}
//TODO check for an opacity graphics state that was already created
//TODO do not set opacity if current value is already active
if (v2Support) {
var objOpac = this.pdf.internal.newObject2();
objOpac.push('<</Type /ExtGState');
//objOpac.push(this.ctx.globalAlpha + " CA"); // Stroke
//objOpac.push(this.ctx.globalAlpha + " ca"); // Not Stroke
objOpac.push('/CA ' + alpha); // Stroke
objOpac.push('/ca ' + alpha); // Not Stroke
objOpac.push('>>');
var gsName = 'GS_O_' + objOpac.objId;
this.pdf.internal.addGraphicsState(gsName, objOpac.objId);
this.pdf.internal.out('/' + gsName + ' gs');
}
var xPath = this.path;
for (var i = 0; i < xPath.length; i++) {
var pt = xPath[i];
switch (pt.type) {
case 'mt':
moves.push({start: pt, deltas: [], abs: []});
break;
case 'lt':
var delta = [
pt.x - xPath[i - 1].x, pt.y - xPath[i - 1].y
];
moves[moves.length - 1].deltas.push(delta);
moves[moves.length - 1].abs.push(pt);
break;
case 'bct':
var delta = [
pt.x1 - xPath[i - 1].x, pt.y1 - xPath[i - 1].y,
pt.x2 - xPath[i - 1].x, pt.y2 - xPath[i - 1].y,
pt.x - xPath[i - 1].x, pt.y - xPath[i - 1].y
];
moves[moves.length - 1].deltas.push(delta);
break;
case 'qct':
// convert to bezier
var x1 = xPath[i - 1].x + 2.0 / 3.0 * (pt.x1 - xPath[i - 1].x);
var y1 = xPath[i - 1].y + 2.0 / 3.0 * (pt.y1 - xPath[i - 1].y);
var x2 = pt.x + 2.0 / 3.0 * (pt.x1 - pt.x);
var y2 = pt.y + 2.0 / 3.0 * (pt.y1 - pt.y);
var x3 = pt.x;
var y3 = pt.y;
var delta = [
x1 - xPath[i - 1].x, y1 - xPath[i - 1].y,
x2 - xPath[i - 1].x, y2 - xPath[i - 1].y,
x3 - xPath[i - 1].x, y3 - xPath[i - 1].y
];
moves[moves.length - 1].deltas.push(delta);
break;
case 'arc':
//TODO this was hack to avoid out of bounds issue
if (moves.length == 0) {
moves.push({start: {x: 0, y: 0}, deltas: [], abs: []});
}
moves[moves.length - 1].arc = true;
moves[moves.length - 1].abs.push(pt);
break;
case 'close':
//moves[moves.length - 1].deltas.push('close');
break;
}
}
for (var i = 0; i < moves.length; i++) {
var style;
if (i == moves.length - 1) {
style = 'f';
if (fillRule === 'evenodd') {
style += '*';
}
} else {
style = null;
}
if (moves[i].arc) {
var arcs = moves[i].abs;
for (var ii = 0; ii < arcs.length; ii++) {
var arc = arcs[ii];
//TODO lines deltas were getting in here
if (typeof arc.startAngle !== 'undefined') {
var start = arc.startAngle * 360 / (2 * Math.PI);
var end = arc.endAngle * 360 / (2 * Math.PI);
// Add the current position (last move to)
//var x = moves[i].start.x + arc.x;
//var y = moves[i].start.y + arc.y;
var x = arc.x;
var y = arc.y;
if (ii == 0) {
this.internal.move2(this, x, y);
}
this.internal.arc2(this, x, y, arc.radius, start, end, arc.anticlockwise, null, isClip);
} else {
this.internal.line2(c2d, arc.x, arc.y);
}
}
// extra move bug causing close to resolve to wrong point
var x = moves[i].start.x;
var y = moves[i].start.y;
this.internal.line2(c2d, x, y);
this.pdf.internal.out('h');
this.pdf.internal.out('f');
}
else {
var x = moves[i].start.x;
var y = moves[i].start.y;
if (!isClip) {
this.pdf.lines(moves[i].deltas, x, y, null, style);
} else {
this.pdf.lines(moves[i].deltas, x, y, null, null);
this.pdf.clip_fixed();
}
}
}
window.outIntercept = outInterceptOld;
// if (this.ctx._clip_path.length > 0) {
// lines.push('Q');
// }
},
pushMask: function () {
var v2Support = typeof this.pdf.internal.newObject2 === 'function';
if (!v2Support) {
console.log('jsPDF v2 not enabled')
return;
}
// define a mask stream
var obj = this.pdf.internal.newStreamObject();
// define a mask state
var obj2 = this.pdf.internal.newObject2();
obj2.push('<</Type /ExtGState');
obj2.push('/SMask <</S /Alpha /G ' + obj.objId + ' 0 R>>'); // /S /Luminosity will need to define color space
obj2.push('>>');
// add mask to page resources
var gsName = 'MASK' + obj2.objId;
this.pdf.internal.addGraphicsState(gsName, obj2.objId);
var instruction = '/' + gsName + ' gs';
this.pdf.internal.out(instruction);
},
clip: function () {
//TODO do we reset the path, or just copy it?
if (this.ctx._clip_path.length > 0) {
for (var i = 0; i < this.path.length; i++) {
this.ctx._clip_path.push(this.path[i]);
}
} else {
this.ctx._clip_path = this.path;
}
this.path = [];
},
measureText: function (text) {
var pdf = this.pdf;
return {
getWidth: function () {
var fontSize = pdf.internal.getFontSize();
var txtWidth = pdf.getStringUnitWidth(text) * fontSize / pdf.internal.scaleFactor;
return txtWidth;
},
get width() {
return this.getWidth(text);
}
}
},
_getBaseline: function (y) {
var height = parseInt(this.pdf.internal.getFontSize());
// TODO Get descent from font descriptor
var descent = height * .25;
switch (this.ctx.textBaseline) {
case 'bottom':
return y - descent;
case 'top':
return y + height;
case 'hanging':
return y + height - descent;
case 'middle':
return y + height / 2 - descent;
case 'ideographic':
// TODO not implemented
return y;
case 'alphabetic':
default:
return y;
}
}
}
;
var c2d = jsPDFAPI.context2d;
// accessor methods
Object.defineProperty(c2d, 'fillStyle', {
set: function (value) {
this.setFillStyle(value);
},
get: function () {
return this.ctx.fillStyle;
}
});
Object.defineProperty(c2d, 'strokeStyle', {
set: function (value) {
this.setStrokeStyle(value);
},
get: function () {
return this.ctx.strokeStyle;
}
});
Object.defineProperty(c2d, 'lineWidth', {
set: function (value) {
this.setLineWidth(value);
},
get: function () {
return this.ctx.lineWidth;
}
});
Object.defineProperty(c2d, 'lineCap', {
set: function (val) {
this.setLineCap(val);
},
get: function () {
return this.ctx.lineCap;
}
});
Object.defineProperty(c2d, 'lineJoin', {
set: function (val) {
this.setLineJoin(val);
},
get: function () {
return this.ctx.lineJoin;
}
});
Object.defineProperty(c2d, 'miterLimit', {
set: function (val) {
this.ctx.miterLimit = val;
},
get: function () {
return this.ctx.miterLimit;
}
});
Object.defineProperty(c2d, 'textBaseline', {
set: function (value) {
this.setTextBaseline(value);
},
get: function () {
return this.getTextBaseline();
}
});
Object.defineProperty(c2d, 'textAlign', {
set: function (value) {
this.setTextAlign(value);
},
get: function () {
return this.getTextAlign();
}
});
Object.defineProperty(c2d, 'font', {
set: function (value) {
this.setFont(value);
},
get: function () {
return this.ctx.font;
}
});
Object.defineProperty(c2d, 'globalCompositeOperation', {
set: function (value) {
this.ctx.globalCompositeOperation = value;
},
get: function () {
return this.ctx.globalCompositeOperation;
}
});
Object.defineProperty(c2d, 'globalAlpha', {
set: function (value) {
this.ctx.globalAlpha = value;
},
get: function () {
return this.ctx.globalAlpha;
}
});
// Not HTML API
Object.defineProperty(c2d, 'ignoreClearRect', {
set: function (value) {
this.ctx.ignoreClearRect = value;
},
get: function () {
return this.ctx.ignoreClearRect;
}
});
// End Not HTML API
c2d.internal = {};
c2d.internal.rxRgb = /rgb\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)/;
c2d.internal.rxRgba = /rgba\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*,\s*([\d\.]+)\s*\)/;
c2d.internal.rxTransparent = /transparent|rgba\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*,\s*0+\s*\)/;
// http://hansmuller-flex.blogspot.com/2011/10/more-about-approximating-circular-arcs.html
c2d.internal.arc = function (c2d, xc, yc, r, a1, a2, anticlockwise, style) {
var includeMove = true;
var k = this.pdf.internal.scaleFactor;
var pageHeight = this.pdf.internal.pageSize.height;
var f2 = this.pdf.internal.f2;
var a1r = a1 * (Math.PI / 180);
var a2r = a2 * (Math.PI / 180);
var curves = this.createArc(r, a1r, a2r, anticlockwise);
var pathData = null;
for (var i = 0; i < curves.length; i++) {
var curve = curves[i];
if (includeMove && i == 0) {
this.pdf.internal.out([
f2((curve.x1 + xc) * k), f2((pageHeight - (curve.y1 + yc)) * k), 'm', f2((curve.x2 + xc) * k), f2((pageHeight - (curve.y2 + yc)) * k), f2((curve.x3 + xc) * k), f2((pageHeight - (curve.y3 + yc)) * k), f2((curve.x4 + xc) * k), f2((pageHeight - (curve.y4 + yc)) * k), 'c'
].join(' '));
} else {
this.pdf.internal.out([
f2((curve.x2 + xc) * k), f2((pageHeight - (curve.y2 + yc)) * k), f2((curve.x3 + xc) * k), f2((pageHeight - (curve.y3 + yc)) * k), f2((curve.x4 + xc) * k), f2((pageHeight - (curve.y4 + yc)) * k), 'c'
].join(' '));
}
//c2d._lastPoint = {x: curve.x1 + xc, y: curve.y1 + yc};
c2d._lastPoint = {x: xc, y: yc};
// f2((curve.x1 + xc) * k), f2((pageHeight - (curve.y1 + yc)) * k), 'm', f2((curve.x2 + xc) * k), f2((pageHeight - (curve.y2 + yc)) * k), f2((curve.x3 + xc) * k), f2((pageHeight - (curve.y3 + yc)) * k), f2((curve.x4 + xc) * k), f2((pageHeight - (curve.y4 + yc)) * k), 'c'
}
if (style !== null) {
this.pdf.internal.out(this.pdf.internal.getStyle(style));
}
};
/**
*
* @param x Edge point X
* @param y Edge point Y
* @param r Radius
* @param a1 start angle
* @param a2 end angle
* @param anticlockwise
* @param style
* @param isClip
*/
c2d.internal.arc2 = function (c2d, x, y, r, a1, a2, anticlockwise, style, isClip) {
// we need to convert from cartesian to polar here methinks.
var centerX = x;// + r;
var centerY = y;
if (false) {
var phi = (a2 - a1);
var start = {
x: r,
y: 0
};
var pt1 = {
x: r,
y: r * 4 / 3 * Math.tan(phi / 4)
};
var pt2 = {
x: r * ( Math.cos(phi) + 4 / 3 * Math.tan(phi / 4) * Math.sin(phi) ),
y: r * ( Math.sin(phi) - 4 / 3 * Math.tan(phi / 4) * Math.cos(phi) )
};
var end = {
x: r * Math.cos(phi),
y: r * Math.sin(phi)
};
var matrix = [Math.cos(a1), Math.sin(a1), -Math.sin(a1), Math.cos(a1), x, y];
start = c2d._matrix_map_point_obj(matrix, start);
pt1 = c2d._matrix_map_point_obj(matrix, pt1);
pt2 = c2d._matrix_map_point_obj(matrix, pt2);
end = c2d._matrix_map_point_obj(matrix, end);
var k = this.pdf.internal.scaleFactor;
var pageHeight = this.pdf.internal.pageSize.height;
var f2 = this.pdf.internal.f2;
this.pdf.internal.out([
f2((start.x) * k), f2((pageHeight - (start.y)) * k), 'm', f2((pt1.x) * k), f2((pageHeight - (pt1.y)) * k), f2((pt2.x) * k), f2((pageHeight - (pt2.y)) * k), f2((end.x) * k), f2((pageHeight - (end.y)) * k), 'c'
].join(' '));
//this.pdf.internal.out('f');
c2d._lastPoint = end;
return;
}
if (!isClip) {
this.arc(c2d, centerX, centerY, r, a1, a2, anticlockwise, style);
} else {
this.arc(c2d, centerX, centerY, r, a1, a2, anticlockwise, null);
this.pdf.clip_fixed();
}
};
c2d.internal.move2 = function (c2d, x, y) {
var k = this.pdf.internal.scaleFactor;
var pageHeight = this.pdf.internal.pageSize.height;
var f2 = this.pdf.internal.f2;
this.pdf.internal.out([
f2((x) * k), f2((pageHeight - (y)) * k), 'm'
].join(' '));
c2d._lastPoint = {x: x, y: y};
};
c2d.internal.line2 = function (c2d, dx, dy) {
var k = this.pdf.internal.scaleFactor;
var pageHeight = this.pdf.internal.pageSize.height;
var f2 = this.pdf.internal.f2;
//var pt = {x: c2d._lastPoint.x + dx, y: c2d._lastPoint.y + dy};
var pt = {x: dx, y: dy};
this.pdf.internal.out([
f2((pt.x) * k), f2((pageHeight - (pt.y)) * k), 'l'
].join(' '));
//this.pdf.internal.out('f');
c2d._lastPoint = pt;
};
/**
* Return a array of objects that represent bezier curves which approximate the circular arc centered at the origin, from startAngle to endAngle (radians) with the specified radius.
*
* Each bezier curve is an object with four points, where x1,y1 and x4,y4 are the arc's end points and x2,y2 and x3,y3 are the cubic bezier's control points.
*/
c2d.internal.createArc = function (radius, startAngle, endAngle, anticlockwise) {
var EPSILON = 0.00001; // Roughly 1/1000th of a degree, see below
// normalize startAngle, endAngle to [-2PI, 2PI]
var twoPI = Math.PI * 2;
var startAngleN = startAngle;
if (startAngleN < twoPI || startAngleN > twoPI) {
startAngleN = startAngleN % twoPI;
}
var endAngleN = endAngle;
if (endAngleN < twoPI || endAngleN > twoPI) {
endAngleN = endAngleN % twoPI;
}
// Compute the sequence of arc curves, up to PI/2 at a time.
// Total arc angle is less than 2PI.
var curves = [];
var piOverTwo = Math.PI / 2.0;
// var sgn = (startAngle < endAngle) ? +1 : -1; // clockwise or counterclockwise
var sgn = anticlockwise ? -1 : +1;
var a1 = startAngle;
for (var totalAngle = Math.min(twoPI, Math.abs(endAngleN - startAngleN)); totalAngle > EPSILON;) {
var a2 = a1 + sgn * Math.min(totalAngle, piOverTwo);
curves.push(this.createSmallArc(radius, a1, a2));
totalAngle -= Math.abs(a2 - a1);
a1 = a2;
}
return curves;
};
c2d.internal.getCurrentPage = function () {
return this.pdf.internal.pages[this.pdf.internal.getCurrentPageInfo().pageNumber];
};
/**
* Cubic bezier approximation of a circular arc centered at the origin, from (radians) a1 to a2, where a2-a1 < pi/2. The arc's radius is r.
*
* Returns an object with four points, where x1,y1 and x4,y4 are the arc's end points and x2,y2 and x3,y3 are the cubic bezier's control points.
*
* This algorithm is based on the approach described in: A. Riškus, "Approximation of a Cubic Bezier Curve by Circular Arcs and Vice Versa," Information Technology and Control, 35(4), 2006 pp. 371-378.
*/
c2d.internal.createSmallArc = function (r, a1, a2) {
// Compute all four points for an arc that subtends the same total angle
// but is centered on the X-axis
var a = (a2 - a1) / 2.0;
var x4 = r * Math.cos(a);
var y4 = r * Math.sin(a);
var x1 = x4;
var y1 = -y4;
var q1 = x1 * x1 + y1 * y1;
var q2 = q1 + x1 * x4 + y1 * y4;
var k2 = 4 / 3 * (Math.sqrt(2 * q1 * q2) - q2) / (x1 * y4 - y1 * x4);
var x2 = x1 - k2 * y1;
var y2 = y1 + k2 * x1;
var x3 = x2;
var y3 = -y2;
// Find the arc points' actual locations by computing x1,y1 and x4,y4
// and rotating the control points by a + a1
var ar = a + a1;
var cos_ar = Math.cos(ar);
var sin_ar = Math.sin(ar);
return {
x1: r * Math.cos(a1),
y1: r * Math.sin(a1),
x2: x2 * cos_ar - y2 * sin_ar,
y2: x2 * sin_ar + y2 * cos_ar,
x3: x3 * cos_ar - y3 * sin_ar,
y3: x3 * sin_ar + y3 * cos_ar,
x4: r * Math.cos(a2),
y4: r * Math.sin(a2)
};
}
function context() {
this._isStrokeTransparent = false;
this._strokeOpacity = 1;
this.strokeStyle = '#000000';
this.fillStyle = '#000000';
this._isFillTransparent = false;
this._fillOpacity = 1;
this.font = "12pt times";
this.textBaseline = 'alphabetic'; // top,bottom,middle,ideographic,alphabetic,hanging
this.textAlign = 'start';
this.lineWidth = 1;
this.lineJoin = 'miter'; // round, bevel, miter
this.lineCap = 'butt'; // butt, round, square
this._transform = [1, 0, 0, 1, 0, 0]; // sx, shy, shx, sy, tx, ty
this.globalCompositeOperation = 'normal';
this.globalAlpha = 1.0;
this._clip_path = [];
// TODO miter limit //default 10
// Not HTML API
this.ignoreClearRect = false;
this.copy = function (ctx) {
this._isStrokeTransparent = ctx._isStrokeTransparent;
this._strokeOpacity = ctx._strokeOpacity;
this.strokeStyle = ctx.strokeStyle;
this._isFillTransparent = ctx._isFillTransparent;
this._fillOpacity = ctx._fillOpacity;
this.fillStyle = ctx.fillStyle;
this.font = ctx.font;
this.lineWidth = ctx.lineWidth;
this.lineJoin = ctx.lineJoin;
this.lineCap = ctx.lineCap;
this.textBaseline = ctx.textBaseline;
this.textAlign = ctx.textAlign;
this._fontSize = ctx._fontSize;
this._transform = ctx._transform.slice(0);
this.globalCompositeOperation = ctx.globalCompositeOperation;
this.globalAlpha = ctx.globalAlpha;
this._clip_path = ctx._clip_path.slice(0); //TODO deep copy?
// Not HTML API
this.ignoreClearRect = ctx.ignoreClearRect;
};
}
return this;
})(jsPDF.API);