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Split files into worker and main thread pieces.

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Brendan Dahl 2013-08-12 10:48:06 -07:00
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commit 5ecce4996b
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678
src/shared/annotation.js Normal file
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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals Util, isDict, isName, stringToPDFString, TODO, Dict, Stream,
stringToBytes, PDFJS, isWorker, assert, NotImplementedException,
Promise, isArray, ObjectLoader, isValidUrl, OperatorList */
'use strict';
var Annotation = (function AnnotationClosure() {
// 12.5.5: Algorithm: Appearance streams
function getTransformMatrix(rect, bbox, matrix) {
var bounds = Util.getAxialAlignedBoundingBox(bbox, matrix);
var minX = bounds[0];
var minY = bounds[1];
var maxX = bounds[2];
var maxY = bounds[3];
if (minX === maxX || minY === maxY) {
// From real-life file, bbox was [0, 0, 0, 0]. In this case,
// just apply the transform for rect
return [1, 0, 0, 1, rect[0], rect[1]];
}
var xRatio = (rect[2] - rect[0]) / (maxX - minX);
var yRatio = (rect[3] - rect[1]) / (maxY - minY);
return [
xRatio,
0,
0,
yRatio,
rect[0] - minX * xRatio,
rect[1] - minY * yRatio
];
}
function getDefaultAppearance(dict) {
var appearanceState = dict.get('AP');
if (!isDict(appearanceState)) {
return;
}
var appearance;
var appearances = appearanceState.get('N');
if (isDict(appearances)) {
var as = dict.get('AS');
if (as && appearances.has(as.name)) {
appearance = appearances.get(as.name);
}
} else {
appearance = appearances;
}
return appearance;
}
function Annotation(params) {
if (params.data) {
this.data = params.data;
return;
}
var dict = params.dict;
var data = this.data = {};
data.subtype = dict.get('Subtype').name;
var rect = dict.get('Rect');
data.rect = Util.normalizeRect(rect);
data.annotationFlags = dict.get('F');
var color = dict.get('C');
if (isArray(color) && color.length === 3) {
// TODO(mack): currently only supporting rgb; need support different
// colorspaces
data.color = color;
} else {
data.color = [0, 0, 0];
}
// Some types of annotations have border style dict which has more
// info than the border array
if (dict.has('BS')) {
var borderStyle = dict.get('BS');
data.borderWidth = borderStyle.has('W') ? borderStyle.get('W') : 1;
} else {
var borderArray = dict.get('Border') || [0, 0, 1];
data.borderWidth = borderArray[2] || 0;
}
this.appearance = getDefaultAppearance(dict);
}
Annotation.prototype = {
getData: function Annotation_getData() {
return this.data;
},
hasHtml: function Annotation_hasHtml() {
return false;
},
getHtmlElement: function Annotation_getHtmlElement(commonObjs) {
throw new NotImplementedException(
'getHtmlElement() should be implemented in subclass');
},
// TODO(mack): Remove this, it's not really that helpful.
getEmptyContainer: function Annotation_getEmptyContainer(tagName, rect) {
assert(!isWorker,
'getEmptyContainer() should be called from main thread');
rect = rect || this.data.rect;
var element = document.createElement(tagName);
element.style.width = Math.ceil(rect[2] - rect[0]) + 'px';
element.style.height = Math.ceil(rect[3] - rect[1]) + 'px';
return element;
},
isViewable: function Annotation_isViewable() {
var data = this.data;
return !!(
data &&
(!data.annotationFlags ||
!(data.annotationFlags & 0x22)) && // Hidden or NoView
data.rect // rectangle is nessessary
);
},
loadResources: function(keys) {
var promise = new Promise();
this.appearance.dict.getAsync('Resources').then(function(resources) {
if (!resources) {
promise.resolve();
return;
}
var objectLoader = new ObjectLoader(resources.map,
keys,
resources.xref);
objectLoader.load().then(function() {
promise.resolve(resources);
});
}.bind(this));
return promise;
},
getOperatorList: function Annotation_getToOperatorList(evaluator) {
var promise = new Promise();
if (!this.appearance) {
promise.resolve(new OperatorList());
return promise;
}
var data = this.data;
var appearanceDict = this.appearance.dict;
var resourcesPromise = this.loadResources([
'ExtGState',
'ColorSpace',
'Pattern',
'Shading',
'XObject',
'Font'
// ProcSet
// Properties
]);
var bbox = appearanceDict.get('BBox') || [0, 0, 1, 1];
var matrix = appearanceDict.get('Matrix') || [1, 0, 0, 1, 0 ,0];
var transform = getTransformMatrix(data.rect, bbox, matrix);
var border = data.border;
resourcesPromise.then(function(resources) {
var opList = new OperatorList();
opList.addOp('beginAnnotation', [data.rect, transform, matrix]);
evaluator.getOperatorList(this.appearance, resources, opList);
opList.addOp('endAnnotation', []);
promise.resolve(opList);
}.bind(this));
return promise;
}
};
Annotation.getConstructor =
function Annotation_getConstructor(subtype, fieldType) {
if (!subtype) {
return;
}
// TODO(mack): Implement FreeText annotations
if (subtype === 'Link') {
return LinkAnnotation;
} else if (subtype === 'Text') {
return TextAnnotation;
} else if (subtype === 'Widget') {
if (!fieldType) {
return;
}
if (fieldType === 'Tx') {
return TextWidgetAnnotation;
} else {
return WidgetAnnotation;
}
} else {
return Annotation;
}
};
// TODO(mack): Support loading annotation from data
Annotation.fromData = function Annotation_fromData(data) {
var subtype = data.subtype;
var fieldType = data.fieldType;
var Constructor = Annotation.getConstructor(subtype, fieldType);
if (Constructor) {
return new Constructor({ data: data });
}
};
Annotation.fromRef = function Annotation_fromRef(xref, ref) {
var dict = xref.fetchIfRef(ref);
if (!isDict(dict)) {
return;
}
var subtype = dict.get('Subtype');
subtype = isName(subtype) ? subtype.name : '';
if (!subtype) {
return;
}
var fieldType = Util.getInheritableProperty(dict, 'FT');
fieldType = isName(fieldType) ? fieldType.name : '';
var Constructor = Annotation.getConstructor(subtype, fieldType);
if (!Constructor) {
return;
}
var params = {
dict: dict,
ref: ref,
};
var annotation = new Constructor(params);
if (annotation.isViewable()) {
return annotation;
} else {
TODO('unimplemented annotation type: ' + subtype);
}
};
Annotation.appendToOperatorList = function Annotation_appendToOperatorList(
annotations, opList, pdfManager, partialEvaluator) {
function reject(e) {
annotationsReadyPromise.reject(e);
}
var annotationsReadyPromise = new Promise();
var annotationPromises = [];
for (var i = 0, n = annotations.length; i < n; ++i) {
annotationPromises.push(annotations[i].getOperatorList(partialEvaluator));
}
Promise.all(annotationPromises).then(function(datas) {
opList.addOp('beginAnnotations', []);
for (var i = 0, n = datas.length; i < n; ++i) {
var annotOpList = datas[i];
opList.addOpList(annotOpList);
}
opList.addOp('endAnnotations', []);
annotationsReadyPromise.resolve();
}, reject);
return annotationsReadyPromise;
};
return Annotation;
})();
PDFJS.Annotation = Annotation;
var WidgetAnnotation = (function WidgetAnnotationClosure() {
function WidgetAnnotation(params) {
Annotation.call(this, params);
if (params.data) {
return;
}
var dict = params.dict;
var data = this.data;
data.fieldValue = stringToPDFString(
Util.getInheritableProperty(dict, 'V') || '');
data.alternativeText = stringToPDFString(dict.get('TU') || '');
data.defaultAppearance = Util.getInheritableProperty(dict, 'DA') || '';
var fieldType = Util.getInheritableProperty(dict, 'FT');
data.fieldType = isName(fieldType) ? fieldType.name : '';
data.fieldFlags = Util.getInheritableProperty(dict, 'Ff') || 0;
this.fieldResources = Util.getInheritableProperty(dict, 'DR') || new Dict();
// Building the full field name by collecting the field and
// its ancestors 'T' data and joining them using '.'.
var fieldName = [];
var namedItem = dict;
var ref = params.ref;
while (namedItem) {
var parent = namedItem.get('Parent');
var parentRef = namedItem.getRaw('Parent');
var name = namedItem.get('T');
if (name) {
fieldName.unshift(stringToPDFString(name));
} else {
// The field name is absent, that means more than one field
// with the same name may exist. Replacing the empty name
// with the '`' plus index in the parent's 'Kids' array.
// This is not in the PDF spec but necessary to id the
// the input controls.
var kids = parent.get('Kids');
var j, jj;
for (j = 0, jj = kids.length; j < jj; j++) {
var kidRef = kids[j];
if (kidRef.num == ref.num && kidRef.gen == ref.gen)
break;
}
fieldName.unshift('`' + j);
}
namedItem = parent;
ref = parentRef;
}
data.fullName = fieldName.join('.');
}
var parent = Annotation.prototype;
Util.inherit(WidgetAnnotation, Annotation, {
isViewable: function WidgetAnnotation_isViewable() {
if (this.data.fieldType === 'Sig') {
TODO('unimplemented annotation type: Widget signature');
return false;
}
return parent.isViewable.call(this);
}
});
return WidgetAnnotation;
})();
var TextWidgetAnnotation = (function TextWidgetAnnotationClosure() {
function TextWidgetAnnotation(params) {
WidgetAnnotation.call(this, params);
if (params.data) {
return;
}
this.data.textAlignment = Util.getInheritableProperty(params.dict, 'Q');
}
// TODO(mack): This dupes some of the logic in CanvasGraphics.setFont()
function setTextStyles(element, item, fontObj) {
var style = element.style;
style.fontSize = item.fontSize + 'px';
style.direction = item.fontDirection < 0 ? 'rtl': 'ltr';
if (!fontObj) {
return;
}
style.fontWeight = fontObj.black ?
(fontObj.bold ? 'bolder' : 'bold') :
(fontObj.bold ? 'bold' : 'normal');
style.fontStyle = fontObj.italic ? 'italic' : 'normal';
var fontName = fontObj.loadedName;
var fontFamily = fontName ? '"' + fontName + '", ' : '';
// Use a reasonable default font if the font doesn't specify a fallback
var fallbackName = fontObj.fallbackName || 'Helvetica, sans-serif';
style.fontFamily = fontFamily + fallbackName;
}
var parent = WidgetAnnotation.prototype;
Util.inherit(TextWidgetAnnotation, WidgetAnnotation, {
hasHtml: function TextWidgetAnnotation_hasHtml() {
return !!this.data.fieldValue;
},
getHtmlElement: function TextWidgetAnnotation_getHtmlElement(commonObjs) {
assert(!isWorker, 'getHtmlElement() shall be called from main thread');
var item = this.data;
var element = this.getEmptyContainer('div');
element.style.display = 'table';
var content = document.createElement('div');
content.textContent = item.fieldValue;
var textAlignment = item.textAlignment;
content.style.textAlign = ['left', 'center', 'right'][textAlignment];
content.style.verticalAlign = 'middle';
content.style.display = 'table-cell';
var fontObj = item.fontRefName ?
commonObjs.getData(item.fontRefName) : null;
var cssRules = setTextStyles(content, item, fontObj);
element.appendChild(content);
return element;
},
getOperatorList: function TextWidgetAnnotation_getOperatorList(evaluator) {
var promise = new Promise();
var opList = new OperatorList();
var data = this.data;
// Even if there is an appearance stream, ignore it. This is the
// behaviour used by Adobe Reader.
var defaultAppearance = data.defaultAppearance;
if (!defaultAppearance) {
promise.resolve(opList);
return promise;
}
// Include any font resources found in the default appearance
var stream = new Stream(stringToBytes(defaultAppearance));
evaluator.getOperatorList(stream, this.fieldResources, opList);
var appearanceFnArray = opList.fnArray;
var appearanceArgsArray = opList.argsArray;
var fnArray = [];
var argsArray = [];
// TODO(mack): Add support for stroke color
data.rgb = [0, 0, 0];
// TODO THIS DOESN'T MAKE ANY SENSE SINCE THE fnArray IS EMPTY!
for (var i = 0, n = fnArray.length; i < n; ++i) {
var fnName = appearanceFnArray[i];
var args = appearanceArgsArray[i];
if (fnName === 'setFont') {
data.fontRefName = args[0];
var size = args[1];
if (size < 0) {
data.fontDirection = -1;
data.fontSize = -size;
} else {
data.fontDirection = 1;
data.fontSize = size;
}
} else if (fnName === 'setFillRGBColor') {
data.rgb = args;
} else if (fnName === 'setFillGray') {
var rgbValue = args[0] * 255;
data.rgb = [rgbValue, rgbValue, rgbValue];
}
}
promise.resolve(opList);
return promise;
}
});
return TextWidgetAnnotation;
})();
var TextAnnotation = (function TextAnnotationClosure() {
function TextAnnotation(params) {
Annotation.call(this, params);
if (params.data) {
return;
}
var dict = params.dict;
var data = this.data;
var content = dict.get('Contents');
var title = dict.get('T');
data.content = stringToPDFString(content || '');
data.title = stringToPDFString(title || '');
data.name = !dict.has('Name') ? 'Note' : dict.get('Name').name;
}
var ANNOT_MIN_SIZE = 10;
Util.inherit(TextAnnotation, Annotation, {
getOperatorList: function TextAnnotation_getOperatorList(evaluator) {
var promise = new Promise();
promise.resolve(new OperatorList());
return promise;
},
hasHtml: function TextAnnotation_hasHtml() {
return true;
},
getHtmlElement: function TextAnnotation_getHtmlElement(commonObjs) {
assert(!isWorker, 'getHtmlElement() shall be called from main thread');
var item = this.data;
var rect = item.rect;
// sanity check because of OOo-generated PDFs
if ((rect[3] - rect[1]) < ANNOT_MIN_SIZE) {
rect[3] = rect[1] + ANNOT_MIN_SIZE;
}
if ((rect[2] - rect[0]) < ANNOT_MIN_SIZE) {
rect[2] = rect[0] + (rect[3] - rect[1]); // make it square
}
var container = this.getEmptyContainer('section', rect);
container.className = 'annotText';
var image = document.createElement('img');
image.style.width = container.style.width;
image.style.height = container.style.height;
var iconName = item.name;
image.src = PDFJS.imageResourcesPath + 'annotation-' +
iconName.toLowerCase() + '.svg';
image.alt = '[{{type}} Annotation]';
image.dataset.l10nId = 'text_annotation_type';
image.dataset.l10nArgs = JSON.stringify({type: iconName});
var content = document.createElement('div');
content.setAttribute('hidden', true);
var title = document.createElement('h1');
var text = document.createElement('p');
content.style.left = Math.floor(rect[2] - rect[0]) + 'px';
content.style.top = '0px';
title.textContent = item.title;
if (!item.content && !item.title) {
content.setAttribute('hidden', true);
} else {
var e = document.createElement('span');
var lines = item.content.split(/(?:\r\n?|\n)/);
for (var i = 0, ii = lines.length; i < ii; ++i) {
var line = lines[i];
e.appendChild(document.createTextNode(line));
if (i < (ii - 1))
e.appendChild(document.createElement('br'));
}
text.appendChild(e);
image.addEventListener('mouseover', function annotationImageOver() {
container.style.zIndex += 1;
content.removeAttribute('hidden');
}, false);
image.addEventListener('mouseout', function annotationImageOut() {
container.style.zIndex -= 1;
content.setAttribute('hidden', true);
}, false);
}
content.appendChild(title);
content.appendChild(text);
container.appendChild(image);
container.appendChild(content);
return container;
}
});
return TextAnnotation;
})();
var LinkAnnotation = (function LinkAnnotationClosure() {
function LinkAnnotation(params) {
Annotation.call(this, params);
if (params.data) {
return;
}
var dict = params.dict;
var data = this.data;
var action = dict.get('A');
if (action) {
var linkType = action.get('S').name;
if (linkType === 'URI') {
var url = action.get('URI');
// TODO: pdf spec mentions urls can be relative to a Base
// entry in the dictionary.
if (!isValidUrl(url, false)) {
url = '';
}
data.url = url;
} else if (linkType === 'GoTo') {
data.dest = action.get('D');
} else if (linkType === 'GoToR') {
var urlDict = action.get('F');
if (isDict(urlDict)) {
// We assume that the 'url' is a Filspec dictionary
// and fetch the url without checking any further
url = urlDict.get('F') || '';
}
// TODO: pdf reference says that GoToR
// can also have 'NewWindow' attribute
if (!isValidUrl(url, false)) {
url = '';
}
data.url = url;
data.dest = action.get('D');
} else if (linkType === 'Named') {
data.action = action.get('N').name;
} else {
TODO('unrecognized link type: ' + linkType);
}
} else if (dict.has('Dest')) {
// simple destination link
var dest = dict.get('Dest');
data.dest = isName(dest) ? dest.name : dest;
}
}
Util.inherit(LinkAnnotation, Annotation, {
hasOperatorList: function LinkAnnotation_hasOperatorList() {
return false;
},
hasHtml: function LinkAnnotation_hasHtml() {
return true;
},
getHtmlElement: function LinkAnnotation_getHtmlElement(commonObjs) {
var rect = this.data.rect;
var element = document.createElement('a');
var borderWidth = this.data.borderWidth;
element.style.borderWidth = borderWidth + 'px';
var color = this.data.color;
var rgb = [];
for (var i = 0; i < 3; ++i) {
rgb[i] = Math.round(color[i] * 255);
}
element.style.borderColor = Util.makeCssRgb(rgb);
element.style.borderStyle = 'solid';
var width = rect[2] - rect[0] - 2 * borderWidth;
var height = rect[3] - rect[1] - 2 * borderWidth;
element.style.width = width + 'px';
element.style.height = height + 'px';
element.href = this.data.url || '';
return element;
}
});
return LinkAnnotation;
})();

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src/shared/cffStandardStrings.js Normal file
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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var CFFEncodingMap = {
'0': '-reserved-',
'1': 'hstem',
'2': '-reserved-',
'3': 'vstem',
'4': 'vmoveto',
'5': 'rlineto',
'6': 'hlineto',
'7': 'vlineto',
'8': 'rrcurveto',
'9': '-reserved-',
'10': 'callsubr',
'11': 'return',
'12': {
'3': 'and',
'4': 'or',
'5': 'not',
'9': 'abs',
'10': 'add',
'11': 'div',
'12': 'sub',
'14': 'neg',
'15': 'eq',
'18': 'drop',
'20': 'put',
'21': 'get',
'22': 'ifelse',
'23': 'random',
'24': 'mul',
'26': 'sqrt',
'27': 'dup',
'28': 'exch',
'29': 'index',
'30': 'roll',
'34': 'hflex',
'35': 'flex',
'36': 'hflex1',
'37': 'flex1'
},
'13': '-reserved-',
'14': 'endchar',
'15': '-reserved-',
'16': '-reserved-',
'17': '-reserved-',
'18': 'hstemhm',
'19': 'hintmask',
'20': 'cntrmask',
'21': 'rmoveto',
'22': 'hmoveto',
'23': 'vstemhm',
'24': 'rcurveline',
'25': 'rlivecurve',
'26': 'vvcurveto',
'27': 'hhcurveto',
'29': 'callgsubr',
'30': 'vhcurveto',
'31': 'hvcurveto'
};
var CFFDictDataMap = {
'0': {
name: 'version',
operand: 'SID'
},
'1': {
name: 'Notice',
operand: 'SID'
},
'2': {
name: 'FullName',
operand: 'SID'
},
'3': {
name: 'FamilyName',
operand: 'SID'
},
'4': {
name: 'Weight',
operand: 'SID'
},
'5': {
name: 'FontBBox',
operand: [0, 0, 0, 0]
},
'6': {
name: 'BlueValues'
},
'7': {
name: 'OtherBlues'
},
'8': {
name: 'FamilyBlues'
},
'9': {
name: 'FamilyOtherBlues'
},
'10': {
name: 'StdHW'
},
'11': {
name: 'StdVW'
},
'12': {
'0': {
name: 'Copyright',
operand: 'SID'
},
'1': {
name: 'IsFixedPitch',
operand: false
},
'2': {
name: 'ItalicAngle',
operand: 0
},
'3': {
name: 'UnderlinePosition',
operand: -100
},
'4': {
name: 'UnderlineThickness',
operand: 50
},
'5': {
name: 'PaintType',
operand: 0
},
'6': {
name: 'CharstringType',
operand: 2
},
'7': {
name: 'FontMatrix',
operand: [0.001, 0, 0, 0.001, 0 , 0]
},
'8': {
name: 'StrokeWidth',
operand: 0
},
'9': {
name: 'BlueScale'
},
'10': {
name: 'BlueShift'
},
'11': {
name: 'BlueFuzz'
},
'12': {
name: 'StemSnapH'
},
'13': {
name: 'StemSnapV'
},
'14': {
name: 'ForceBold'
},
'17': {
name: 'LanguageGroup'
},
'18': {
name: 'ExpansionFactor'
},
'19': {
name: 'initialRandomSeed'
},
'20': {
name: 'SyntheticBase',
operand: null
},
'21': {
name: 'PostScript',
operand: 'SID'
},
'22': {
name: 'BaseFontName',
operand: 'SID'
},
'23': {
name: 'BaseFontBlend',
operand: 'delta'
}
},
'13': {
name: 'UniqueID',
operand: null
},
'14': {
name: 'XUID',
operand: []
},
'15': {
name: 'charset',
operand: 0
},
'16': {
name: 'Encoding',
operand: 0
},
'17': {
name: 'CharStrings',
operand: null
},
'18': {
name: 'Private',
operand: 'number number'
},
'19': {
name: 'Subrs'
},
'20': {
name: 'defaultWidthX'
},
'21': {
name: 'nominalWidthX'
}
};
var CFFDictPrivateDataMap = {
'6': {
name: 'BluesValues',
operand: 'delta'
},
'7': {
name: 'OtherBlues',
operand: 'delta'
},
'8': {
name: 'FamilyBlues',
operand: 'delta'
},
'9': {
name: 'FamilyOtherBlues',
operand: 'delta'
},
'10': {
name: 'StdHW',
operand: null
},
'11': {
name: 'StdVW',
operand: null
},
'12': {
'9': {
name: 'BlueScale',
operand: 0.039625
},
'10': {
name: 'BlueShift',
operand: 7
},
'11': {
name: 'BlueFuzz',
operand: 1
},
'12': {
name: 'StemSnapH',
operand: 'delta'
},
'13': {
name: 'StemSnapV',
operand: 'delta'
},
'14': {
name: 'ForceBold',
operand: 'boolean'
},
'17': {
name: 'LanguageGroup',
operand: 0
},
'18': {
name: 'ExpansionFactor',
operand: 0.06
},
'19': {
name: 'initialRandomSeed',
operand: 0
}
},
'19': {
name: 'Subrs',
operand: null
},
'20': {
name: 'defaultWidthX',
operand: 0
},
'21': {
name: 'nominalWidthX',
operand: 0
}
};

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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals error, info, isArray, isDict, isName, isStream, isString,
PDFFunction, warn, shadow */
'use strict';
var ColorSpace = (function ColorSpaceClosure() {
// Constructor should define this.numComps, this.defaultColor, this.name
function ColorSpace() {
error('should not call ColorSpace constructor');
}
ColorSpace.prototype = {
/**
* Converts the color value to the RGB color. The color components are
* located in the src array starting from the srcOffset. Returns the array
* of the rgb components, each value ranging from [0,255].
*/
getRgb: function ColorSpace_getRgb(src, srcOffset) {
error('Should not call ColorSpace.getRgb');
},
/**
* Converts the color value to the RGB color, similar to the getRgb method.
* The result placed into the dest array starting from the destOffset.
*/
getRgbItem: function ColorSpace_getRgb(src, srcOffset, dest, destOffset) {
error('Should not call ColorSpace.getRgbItem');
},
/**
* Converts the specified number of the color values to the RGB colors.
* The colors are located in the src array starting from the srcOffset.
* The result is placed into the dest array starting from the destOffset.
* The src array items shall be in [0,2^bits) range, the dest array items
* will be in [0,255] range.
*/
getRgbBuffer: function ColorSpace_getRgbBuffer(src, srcOffset, count,
dest, destOffset, bits) {
error('Should not call ColorSpace.getRgbBuffer');
},
/**
* Determines amount of the bytes is required to store the reslut of the
* conversion that done by the getRgbBuffer method.
*/
getOutputLength: function ColorSpace_getOutputLength(inputLength) {
error('Should not call ColorSpace.getOutputLength');
},
/**
* Returns true if source data will be equal the result/output data.
*/
isPassthrough: function ColorSpace_isPassthrough(bits) {
return false;
},
/**
* Creates the output buffer and converts the specified number of the color
* values to the RGB colors, similar to the getRgbBuffer.
*/
createRgbBuffer: function ColorSpace_createRgbBuffer(src, srcOffset,
count, bits) {
if (this.isPassthrough(bits)) {
return src.subarray(srcOffset);
}
var dest = new Uint8Array(count * 3);
var numComponentColors = 1 << bits;
// Optimization: create a color map when there is just one component and
// we are converting more colors than the size of the color map. We
// don't build the map if the colorspace is gray or rgb since those
// methods are faster than building a map. This mainly offers big speed
// ups for indexed and alternate colorspaces.
if (this.numComps === 1 && count > numComponentColors &&
this.name !== 'DeviceGray' && this.name !== 'DeviceRGB') {
// TODO it may be worth while to cache the color map. While running
// testing I never hit a cache so I will leave that out for now (perhaps
// we are reparsing colorspaces too much?).
var allColors = bits <= 8 ? new Uint8Array(numComponentColors) :
new Uint16Array(numComponentColors);
for (var i = 0; i < numComponentColors; i++) {
allColors[i] = i;
}
var colorMap = new Uint8Array(numComponentColors * 3);
this.getRgbBuffer(allColors, 0, numComponentColors, colorMap, 0, bits);
var destOffset = 0;
for (var i = 0; i < count; ++i) {
var key = src[srcOffset++] * 3;
dest[destOffset++] = colorMap[key];
dest[destOffset++] = colorMap[key + 1];
dest[destOffset++] = colorMap[key + 2];
}
return dest;
}
this.getRgbBuffer(src, srcOffset, count, dest, 0, bits);
return dest;
},
/**
* True if the colorspace has components in the default range of [0, 1].
* This should be true for all colorspaces except for lab color spaces
* which are [0,100], [-128, 127], [-128, 127].
*/
usesZeroToOneRange: true
};
ColorSpace.parse = function ColorSpace_parse(cs, xref, res) {
var IR = ColorSpace.parseToIR(cs, xref, res);
if (IR instanceof AlternateCS)
return IR;
return ColorSpace.fromIR(IR);
};
ColorSpace.fromIR = function ColorSpace_fromIR(IR) {
var name = isArray(IR) ? IR[0] : IR;
switch (name) {
case 'DeviceGrayCS':
return this.singletons.gray;
case 'DeviceRgbCS':
return this.singletons.rgb;
case 'DeviceCmykCS':
return this.singletons.cmyk;
case 'PatternCS':
var basePatternCS = IR[1];
if (basePatternCS)
basePatternCS = ColorSpace.fromIR(basePatternCS);
return new PatternCS(basePatternCS);
case 'IndexedCS':
var baseIndexedCS = IR[1];
var hiVal = IR[2];
var lookup = IR[3];
return new IndexedCS(ColorSpace.fromIR(baseIndexedCS), hiVal, lookup);
case 'AlternateCS':
var numComps = IR[1];
var alt = IR[2];
var tintFnIR = IR[3];
return new AlternateCS(numComps, ColorSpace.fromIR(alt),
PDFFunction.fromIR(tintFnIR));
case 'LabCS':
var whitePoint = IR[1].WhitePoint;
var blackPoint = IR[1].BlackPoint;
var range = IR[1].Range;
return new LabCS(whitePoint, blackPoint, range);
default:
error('Unkown name ' + name);
}
return null;
};
ColorSpace.parseToIR = function ColorSpace_parseToIR(cs, xref, res) {
if (isName(cs)) {
var colorSpaces = res.get('ColorSpace');
if (isDict(colorSpaces)) {
var refcs = colorSpaces.get(cs.name);
if (refcs)
cs = refcs;
}
}
cs = xref.fetchIfRef(cs);
var mode;
if (isName(cs)) {
mode = cs.name;
this.mode = mode;
switch (mode) {
case 'DeviceGray':
case 'G':
return 'DeviceGrayCS';
case 'DeviceRGB':
case 'RGB':
return 'DeviceRgbCS';
case 'DeviceCMYK':
case 'CMYK':
return 'DeviceCmykCS';
case 'Pattern':
return ['PatternCS', null];
default:
error('unrecognized colorspace ' + mode);
}
} else if (isArray(cs)) {
mode = cs[0].name;
this.mode = mode;
switch (mode) {
case 'DeviceGray':
case 'G':
return 'DeviceGrayCS';
case 'DeviceRGB':
case 'RGB':
return 'DeviceRgbCS';
case 'DeviceCMYK':
case 'CMYK':
return 'DeviceCmykCS';
case 'CalGray':
return 'DeviceGrayCS';
case 'CalRGB':
return 'DeviceRgbCS';
case 'ICCBased':
var stream = xref.fetchIfRef(cs[1]);
var dict = stream.dict;
var numComps = dict.get('N');
if (numComps == 1)
return 'DeviceGrayCS';
if (numComps == 3)
return 'DeviceRgbCS';
if (numComps == 4)
return 'DeviceCmykCS';
break;
case 'Pattern':
var basePatternCS = cs[1];
if (basePatternCS)
basePatternCS = ColorSpace.parseToIR(basePatternCS, xref, res);
return ['PatternCS', basePatternCS];
case 'Indexed':
case 'I':
var baseIndexedCS = ColorSpace.parseToIR(cs[1], xref, res);
var hiVal = cs[2] + 1;
var lookup = xref.fetchIfRef(cs[3]);
if (isStream(lookup)) {
lookup = lookup.getBytes();
}
return ['IndexedCS', baseIndexedCS, hiVal, lookup];
case 'Separation':
case 'DeviceN':
var name = cs[1];
var numComps = 1;
if (isName(name))
numComps = 1;
else if (isArray(name))
numComps = name.length;
var alt = ColorSpace.parseToIR(cs[2], xref, res);
var tintFnIR = PDFFunction.getIR(xref, xref.fetchIfRef(cs[3]));
return ['AlternateCS', numComps, alt, tintFnIR];
case 'Lab':
var params = cs[1].getAll();
return ['LabCS', params];
default:
error('unimplemented color space object "' + mode + '"');
}
} else {
error('unrecognized color space object: "' + cs + '"');
}
return null;
};
/**
* Checks if a decode map matches the default decode map for a color space.
* This handles the general decode maps where there are two values per
* component. e.g. [0, 1, 0, 1, 0, 1] for a RGB color.
* This does not handle Lab, Indexed, or Pattern decode maps since they are
* slightly different.
* @param {Array} decode Decode map (usually from an image).
* @param {Number} n Number of components the color space has.
*/
ColorSpace.isDefaultDecode = function ColorSpace_isDefaultDecode(decode, n) {
if (!decode)
return true;
if (n * 2 !== decode.length) {
warn('The decode map is not the correct length');
return true;
}
for (var i = 0, ii = decode.length; i < ii; i += 2) {
if (decode[i] !== 0 || decode[i + 1] != 1)
return false;
}
return true;
};
ColorSpace.singletons = {
get gray() {
return shadow(this, 'gray', new DeviceGrayCS());
},
get rgb() {
return shadow(this, 'rgb', new DeviceRgbCS());
},
get cmyk() {
return shadow(this, 'cmyk', new DeviceCmykCS());
}
};
return ColorSpace;
})();
/**
* Alternate color space handles both Separation and DeviceN color spaces. A
* Separation color space is actually just a DeviceN with one color component.
* Both color spaces use a tinting function to convert colors to a base color
* space.
*/
var AlternateCS = (function AlternateCSClosure() {
function AlternateCS(numComps, base, tintFn) {
this.name = 'Alternate';
this.numComps = numComps;
this.defaultColor = new Float32Array(numComps);
for (var i = 0; i < numComps; ++i) {
this.defaultColor[i] = 1;
}
this.base = base;
this.tintFn = tintFn;
}
AlternateCS.prototype = {
getRgb: function AlternateCS_getRgb(src, srcOffset) {
var rgb = new Uint8Array(3);
this.getRgbItem(src, srcOffset, rgb, 0);
return rgb;
},
getRgbItem: function AlternateCS_getRgbItem(src, srcOffset,
dest, destOffset) {
var baseNumComps = this.base.numComps;
var input = 'subarray' in src ?
src.subarray(srcOffset, srcOffset + this.numComps) :
Array.prototype.slice.call(src, srcOffset, srcOffset + this.numComps);
var tinted = this.tintFn(input);
this.base.getRgbItem(tinted, 0, dest, destOffset);
},
getRgbBuffer: function AlternateCS_getRgbBuffer(src, srcOffset, count,
dest, destOffset, bits) {
var tintFn = this.tintFn;
var base = this.base;
var scale = 1 / ((1 << bits) - 1);
var baseNumComps = base.numComps;
var usesZeroToOneRange = base.usesZeroToOneRange;
var isPassthrough = base.isPassthrough(8) || !usesZeroToOneRange;
var pos = isPassthrough ? destOffset : 0;
var baseBuf = isPassthrough ? dest : new Uint8Array(baseNumComps * count);
var numComps = this.numComps;
var scaled = new Float32Array(numComps);
for (var i = 0; i < count; i++) {
for (var j = 0; j < numComps; j++) {
scaled[j] = src[srcOffset++] * scale;
}
var tinted = tintFn(scaled);
if (usesZeroToOneRange) {
for (var j = 0; j < baseNumComps; j++) {
baseBuf[pos++] = tinted[j] * 255;
}
} else {
base.getRgbItem(tinted, 0, baseBuf, pos);
pos += baseNumComps;
}
}
if (!isPassthrough) {
base.getRgbBuffer(baseBuf, 0, count, dest, destOffset, 8);
}
},
getOutputLength: function AlternateCS_getOutputLength(inputLength) {
return this.base.getOutputLength(inputLength *
this.base.numComps / this.numComps);
},
isPassthrough: ColorSpace.prototype.isPassthrough,
createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
isDefaultDecode: function AlternateCS_isDefaultDecode(decodeMap) {
return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
},
usesZeroToOneRange: true
};
return AlternateCS;
})();
var PatternCS = (function PatternCSClosure() {
function PatternCS(baseCS) {
this.name = 'Pattern';
this.base = baseCS;
}
PatternCS.prototype = {};
return PatternCS;
})();
var IndexedCS = (function IndexedCSClosure() {
function IndexedCS(base, highVal, lookup) {
this.name = 'Indexed';
this.numComps = 1;
this.defaultColor = new Uint8Array([0]);
this.base = base;
this.highVal = highVal;
var baseNumComps = base.numComps;
var length = baseNumComps * highVal;
var lookupArray;
if (isStream(lookup)) {
lookupArray = new Uint8Array(length);
var bytes = lookup.getBytes(length);
lookupArray.set(bytes);
} else if (isString(lookup)) {
lookupArray = new Uint8Array(length);
for (var i = 0; i < length; ++i)
lookupArray[i] = lookup.charCodeAt(i);
} else if (lookup instanceof Uint8Array || lookup instanceof Array) {
lookupArray = lookup;
} else {
error('Unrecognized lookup table: ' + lookup);
}
this.lookup = lookupArray;
}
IndexedCS.prototype = {
getRgb: function IndexedCS_getRgb(src, srcOffset) {
var numComps = this.base.numComps;
var start = src[srcOffset] * numComps;
return this.base.getRgb(this.lookup, start);
},
getRgbItem: function IndexedCS_getRgbItem(src, srcOffset,
dest, destOffset) {
var numComps = this.base.numComps;
var start = src[srcOffset] * numComps;
this.base.getRgbItem(this.lookup, start, dest, destOffset);
},
getRgbBuffer: function IndexedCS_getRgbBuffer(src, srcOffset, count,
dest, destOffset) {
var base = this.base;
var numComps = base.numComps;
var outputDelta = base.getOutputLength(numComps);
var lookup = this.lookup;
for (var i = 0; i < count; ++i) {
var lookupPos = src[srcOffset++] * numComps;
base.getRgbBuffer(lookup, lookupPos, 1, dest, destOffset, 8);
destOffset += outputDelta;
}
},
getOutputLength: function IndexedCS_getOutputLength(inputLength) {
return this.base.getOutputLength(inputLength * this.base.numComps);
},
isPassthrough: ColorSpace.prototype.isPassthrough,
createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
isDefaultDecode: function IndexedCS_isDefaultDecode(decodeMap) {
// indexed color maps shouldn't be changed
return true;
},
usesZeroToOneRange: true
};
return IndexedCS;
})();
var DeviceGrayCS = (function DeviceGrayCSClosure() {
function DeviceGrayCS() {
this.name = 'DeviceGray';
this.numComps = 1;
this.defaultColor = new Float32Array([0]);
}
DeviceGrayCS.prototype = {
getRgb: function DeviceGrayCS_getRgb(src, srcOffset) {
var rgb = new Uint8Array(3);
this.getRgbItem(src, srcOffset, rgb, 0);
return rgb;
},
getRgbItem: function DeviceGrayCS_getRgbItem(src, srcOffset,
dest, destOffset) {
var c = (src[srcOffset] * 255) | 0;
c = c < 0 ? 0 : c > 255 ? 255 : c;
dest[destOffset] = dest[destOffset + 1] = dest[destOffset + 2] = c;
},
getRgbBuffer: function DeviceGrayCS_getRgbBuffer(src, srcOffset, count,
dest, destOffset, bits) {
var scale = 255 / ((1 << bits) - 1);
var j = srcOffset, q = destOffset;
for (var i = 0; i < count; ++i) {
var c = (scale * src[j++]) | 0;
dest[q++] = c;
dest[q++] = c;
dest[q++] = c;
}
},
getOutputLength: function DeviceGrayCS_getOutputLength(inputLength) {
return inputLength * 3;
},
isPassthrough: ColorSpace.prototype.isPassthrough,
createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
isDefaultDecode: function DeviceGrayCS_isDefaultDecode(decodeMap) {
return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
},
usesZeroToOneRange: true
};
return DeviceGrayCS;
})();
var DeviceRgbCS = (function DeviceRgbCSClosure() {
function DeviceRgbCS() {
this.name = 'DeviceRGB';
this.numComps = 3;
this.defaultColor = new Float32Array([0, 0, 0]);
}
DeviceRgbCS.prototype = {
getRgb: function DeviceRgbCS_getRgb(src, srcOffset) {
var rgb = new Uint8Array(3);
this.getRgbItem(src, srcOffset, rgb, 0);
return rgb;
},
getRgbItem: function DeviceRgbCS_getRgbItem(src, srcOffset,
dest, destOffset) {
var r = (src[srcOffset] * 255) | 0;
var g = (src[srcOffset + 1] * 255) | 0;
var b = (src[srcOffset + 2] * 255) | 0;
dest[destOffset] = r < 0 ? 0 : r > 255 ? 255 : r;
dest[destOffset + 1] = g < 0 ? 0 : g > 255 ? 255 : g;
dest[destOffset + 2] = b < 0 ? 0 : b > 255 ? 255 : b;
},
getRgbBuffer: function DeviceRgbCS_getRgbBuffer(src, srcOffset, count,
dest, destOffset, bits) {
var length = count * 3;
if (bits == 8) {
dest.set(src.subarray(srcOffset, srcOffset + length), destOffset);
return;
}
var scale = 255 / ((1 << bits) - 1);
var j = srcOffset, q = destOffset;
for (var i = 0; i < length; ++i) {
dest[q++] = (scale * src[j++]) | 0;
}
},
getOutputLength: function DeviceRgbCS_getOutputLength(inputLength) {
return inputLength;
},
isPassthrough: function DeviceRgbCS_isPassthrough(bits) {
return bits == 8;
},
createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
isDefaultDecode: function DeviceRgbCS_isDefaultDecode(decodeMap) {
return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
},
usesZeroToOneRange: true
};
return DeviceRgbCS;
})();
var DeviceCmykCS = (function DeviceCmykCSClosure() {
// The coefficients below was found using numerical analysis: the method of
// steepest descent for the sum((f_i - color_value_i)^2) for r/g/b colors,
// where color_value is the tabular value from the table of sampled RGB colors
// from CMYK US Web Coated (SWOP) colorspace, and f_i is the corresponding
// CMYK color conversion using the estimation below:
// f(A, B,.. N) = Acc+Bcm+Ccy+Dck+c+Fmm+Gmy+Hmk+Im+Jyy+Kyk+Ly+Mkk+Nk+255
function convertToRgb(src, srcOffset, srcScale, dest, destOffset) {
var c = src[srcOffset + 0] * srcScale;
var m = src[srcOffset + 1] * srcScale;
var y = src[srcOffset + 2] * srcScale;
var k = src[srcOffset + 3] * srcScale;
var r =
c * (-4.387332384609988 * c + 54.48615194189176 * m +
18.82290502165302 * y + 212.25662451639585 * k +
-285.2331026137004) +
m * (1.7149763477362134 * m - 5.6096736904047315 * y +
-17.873870861415444 * k - 5.497006427196366) +
y * (-2.5217340131683033 * y - 21.248923337353073 * k +
17.5119270841813) +
k * (-21.86122147463605 * k - 189.48180835922747) + 255;
var g =
c * (8.841041422036149 * c + 60.118027045597366 * m +
6.871425592049007 * y + 31.159100130055922 * k +
-79.2970844816548) +
m * (-15.310361306967817 * m + 17.575251261109482 * y +
131.35250912493976 * k - 190.9453302588951) +
y * (4.444339102852739 * y + 9.8632861493405 * k - 24.86741582555878) +
k * (-20.737325471181034 * k - 187.80453709719578) + 255;
var b =
c * (0.8842522430003296 * c + 8.078677503112928 * m +
30.89978309703729 * y - 0.23883238689178934 * k +
-14.183576799673286) +
m * (10.49593273432072 * m + 63.02378494754052 * y +
50.606957656360734 * k - 112.23884253719248) +
y * (0.03296041114873217 * y + 115.60384449646641 * k +
-193.58209356861505) +
k * (-22.33816807309886 * k - 180.12613974708367) + 255;
dest[destOffset] = r > 255 ? 255 : r < 0 ? 0 : r;
dest[destOffset + 1] = g > 255 ? 255 : g < 0 ? 0 : g;
dest[destOffset + 2] = b > 255 ? 255 : b < 0 ? 0 : b;
}
function DeviceCmykCS() {
this.name = 'DeviceCMYK';
this.numComps = 4;
this.defaultColor = new Float32Array([0, 0, 0, 1]);
}
DeviceCmykCS.prototype = {
getRgb: function DeviceCmykCS_getRgb(src, srcOffset) {
var rgb = new Uint8Array(3);
convertToRgb(src, srcOffset, 1, rgb, 0);
return rgb;
},
getRgbItem: function DeviceCmykCS_getRgbItem(src, srcOffset,
dest, destOffset) {
convertToRgb(src, srcOffset, 1, dest, destOffset);
},
getRgbBuffer: function DeviceCmykCS_getRgbBuffer(src, srcOffset, count,
dest, destOffset, bits) {
var scale = 1 / ((1 << bits) - 1);
for (var i = 0; i < count; i++) {
convertToRgb(src, srcOffset, scale, dest, destOffset);
srcOffset += 4;
destOffset += 3;
}
},
getOutputLength: function DeviceCmykCS_getOutputLength(inputLength) {
return (inputLength >> 2) * 3;
},
isPassthrough: ColorSpace.prototype.isPassthrough,
createRgbBuffer: ColorSpace.prototype.createRgbBuffer,
isDefaultDecode: function DeviceCmykCS_isDefaultDecode(decodeMap) {
return ColorSpace.isDefaultDecode(decodeMap, this.numComps);
},
usesZeroToOneRange: true
};
return DeviceCmykCS;
})();
//
// LabCS: Based on "PDF Reference, Sixth Ed", p.250
//
var LabCS = (function LabCSClosure() {
function LabCS(whitePoint, blackPoint, range) {
this.name = 'Lab';
this.numComps = 3;
this.defaultColor = new Float32Array([0, 0, 0]);
if (!whitePoint)
error('WhitePoint missing - required for color space Lab');
blackPoint = blackPoint || [0, 0, 0];
range = range || [-100, 100, -100, 100];
// Translate args to spec variables
this.XW = whitePoint[0];
this.YW = whitePoint[1];
this.ZW = whitePoint[2];
this.amin = range[0];
this.amax = range[1];
this.bmin = range[2];
this.bmax = range[3];
// These are here just for completeness - the spec doesn't offer any
// formulas that use BlackPoint in Lab
this.XB = blackPoint[0];
this.YB = blackPoint[1];
this.ZB = blackPoint[2];
// Validate vars as per spec
if (this.XW < 0 || this.ZW < 0 || this.YW !== 1)
error('Invalid WhitePoint components, no fallback available');
if (this.XB < 0 || this.YB < 0 || this.ZB < 0) {
info('Invalid BlackPoint, falling back to default');
this.XB = this.YB = this.ZB = 0;
}
if (this.amin > this.amax || this.bmin > this.bmax) {
info('Invalid Range, falling back to defaults');
this.amin = -100;
this.amax = 100;
this.bmin = -100;
this.bmax = 100;
}
}
// Function g(x) from spec
function fn_g(x) {
if (x >= 6 / 29)
return x * x * x;
else
return (108 / 841) * (x - 4 / 29);
}
function decode(value, high1, low2, high2) {
return low2 + (value) * (high2 - low2) / (high1);
}
// If decoding is needed maxVal should be 2^bits per component - 1.
function convertToRgb(cs, src, srcOffset, maxVal, dest, destOffset) {
// XXX: Lab input is in the range of [0, 100], [amin, amax], [bmin, bmax]
// not the usual [0, 1]. If a command like setFillColor is used the src
// values will already be within the correct range. However, if we are
// converting an image we have to map the values to the correct range given
// above.
// Ls,as,bs <---> L*,a*,b* in the spec
var Ls = src[srcOffset];
var as = src[srcOffset + 1];
var bs = src[srcOffset + 2];
if (maxVal !== false) {
Ls = decode(Ls, maxVal, 0, 100);
as = decode(as, maxVal, cs.amin, cs.amax);
bs = decode(bs, maxVal, cs.bmin, cs.bmax);
}
// Adjust limits of 'as' and 'bs'
as = as > cs.amax ? cs.amax : as < cs.amin ? cs.amin : as;
bs = bs > cs.bmax ? cs.bmax : bs < cs.bmin ? cs.bmin : bs;
// Computes intermediate variables X,Y,Z as per spec
var M = (Ls + 16) / 116;
var L = M + (as / 500);
var N = M - (bs / 200);
var X = cs.XW * fn_g(L);
var Y = cs.YW * fn_g(M);
var Z = cs.ZW * fn_g(N);
var r, g, b;
// Using different conversions for D50 and D65 white points,
// per http://www.color.org/srgb.pdf
if (cs.ZW < 1) {
// Assuming D50 (X=0.9642, Y=1.00, Z=0.8249)
r = X * 3.1339 + Y * -1.6170 + Z * -0.4906;
g = X * -0.9785 + Y * 1.9160 + Z * 0.0333;
b = X * 0.0720 + Y * -0.2290 + Z * 1.4057;
} else {
// Assuming D65 (X=0.9505, Y=1.00, Z=1.0888)
r = X * 3.2406 + Y * -1.5372 + Z * -0.4986;
g = X * -0.9689 + Y * 1.8758 + Z * 0.0415;
b = X * 0.0557 + Y * -0.2040 + Z * 1.0570;
}
// clamp color values to [0,1] range then convert to [0,255] range.
dest[destOffset] = Math.sqrt(r < 0 ? 0 : r > 1 ? 1 : r) * 255;
dest[destOffset + 1] = Math.sqrt(g < 0 ? 0 : g > 1 ? 1 : g) * 255;
dest[destOffset + 2] = Math.sqrt(b < 0 ? 0 : b > 1 ? 1 : b) * 255;
}
LabCS.prototype = {
getRgb: function LabCS_getRgb(src, srcOffset) {
var rgb = new Uint8Array(3);
convertToRgb(this, src, srcOffset, false, rgb, 0);
return rgb;
},
getRgbItem: function LabCS_getRgbItem(src, srcOffset, dest, destOffset) {
convertToRgb(this, src, srcOffset, false, dest, destOffset);
},
getRgbBuffer: function LabCS_getRgbBuffer(src, srcOffset, count,
dest, destOffset, bits) {
var maxVal = (1 << bits) - 1;
for (var i = 0; i < count; i++) {
convertToRgb(this, src, srcOffset, maxVal, dest, destOffset);
srcOffset += 3;
destOffset += 3;
}
},
getOutputLength: function LabCS_getOutputLength(inputLength) {
return inputLength;
},
isPassthrough: ColorSpace.prototype.isPassthrough,
isDefaultDecode: function LabCS_isDefaultDecode(decodeMap) {
// XXX: Decoding is handled with the lab conversion because of the strange
// ranges that are used.
return true;
},
usesZeroToOneRange: false
};
return LabCS;
})();

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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals CFFDictDataMap, CFFDictPrivateDataMap, CFFEncodingMap, CFFStrings,
Components, Dict, dump, error, isNum, log, netscape, Stream */
'use strict';
/*
* The Type2 reader code below is only used for debugging purpose since Type2
* is only a CharString format and is never used directly as a Font file.
*
* So the code here is useful for dumping the data content of a .cff file in
* order to investigate the similarity between a Type1 CharString and a Type2
* CharString or to understand the structure of the CFF format.
*/
/*
* Build a charset by assigning the glyph name and the human readable form
* of the glyph data.
*/
function readCharset(aStream, aCharstrings) {
var charset = {};
var format = aStream.getByte();
var count = aCharstrings.length - 1;
if (format === 0) {
charset['.notdef'] = readCharstringEncoding(aCharstrings[0]);
for (var i = 1; i < count + 1; i++) {
var sid = aStream.getByte() << 8 | aStream.getByte();
charset[CFFStrings[sid]] = readCharstringEncoding(aCharstrings[i]);
//log(CFFStrings[sid] + "::" + charset[CFFStrings[sid]]);
}
} else if (format == 1) {
for (var i = 1; i < count + 1; i++) {
var first = aStream.getByte();
first = (first << 8) | aStream.getByte();
var numLeft = aStream.getByte();
for (var j = 0; j <= numLeft; j++) {
var sid = first++;
if (CFFStrings[sid] == 'three')
log(aCharstrings[j]);
charset[CFFStrings[sid]] = readCharstringEncoding(aCharstrings[j]);
}
}
} else {
error('Invalid charset format');
}
return charset;
}
/*
* Take a Type2 binary charstring as input and transform it to a human
* readable representation as specified by the 'The Type 2 Charstring Format',
* chapter 3.1.
*/
function readCharstringEncoding(aString) {
if (!aString)
return '';
var charstringTokens = [];
var count = aString.length;
for (var i = 0; i < count; ) {
var value = aString[i++];
var token = null;
if (value < 0) {
continue;
} else if (value <= 11) {
token = CFFEncodingMap[value];
} else if (value == 12) {
token = CFFEncodingMap[value][aString[i++]];
} else if (value <= 18) {
token = CFFEncodingMap[value];
} else if (value <= 20) {
var mask = aString[i++];
token = CFFEncodingMap[value];
} else if (value <= 27) {
token = CFFEncodingMap[value];
} else if (value == 28) {
token = aString[i++] << 8 | aString[i++];
} else if (value <= 31) {
token = CFFEncodingMap[value];
} else if (value < 247) {
token = parseInt(value, 10) - 139;
} else if (value < 251) {
token = (value - 247) * 256 + aString[i++] + 108;
} else if (value < 255) {
token = -(value - 251) * 256 - aString[i++] - 108;
} else {// value == 255
token = aString[i++] << 24 | aString[i++] << 16 |
aString[i++] << 8 | aString[i];
}
charstringTokens.push(token);
}
return charstringTokens;
}
/*
* Take a binary DICT Data as input and transform it into a human readable
* form as specified by 'The Compact Font Format Specification', chapter 5.
*/
function readFontDictData(aString, aMap) {
var fontDictDataTokens = [];
var count = aString.length;
for (var i = 0; i < count; i) {
var value = aString[i++];
var token = null;
if (value == 12) {
token = aMap[value][aString[i++]];
} else if (value == 28) {
token = aString[i++] << 8 | aString[i++];
} else if (value == 29) {
token = aString[i++] << 24 |
aString[i++] << 16 |
aString[i++] << 8 |
aString[i++];
} else if (value == 30) {
token = '';
var parsed = false;
while (!parsed) {
var octet = aString[i++];
var nibbles = [parseInt(octet / 16, 10), parseInt(octet % 16, 10)];
for (var j = 0; j < nibbles.length; j++) {
var nibble = nibbles[j];
switch (nibble) {
case 0xA:
token += '.';
break;
case 0xB:
token += 'E';
break;
case 0xC:
token += 'E-';
break;
case 0xD:
break;
case 0xE:
token += '-';
break;
case 0xF:
parsed = true;
break;
default:
token += nibble;
break;
}
}
}
token = parseFloat(token);
} else if (value <= 31) {
token = aMap[value];
} else if (value <= 246) {
token = parseInt(value, 10) - 139;
} else if (value <= 250) {
token = (value - 247) * 256 + aString[i++] + 108;
} else if (value <= 254) {
token = -(value - 251) * 256 - aString[i++] - 108;
} else if (value == 255) {
error('255 is not a valid DICT command');
}
fontDictDataTokens.push(token);
}
return fontDictDataTokens;
}
/*
* Take a stream as input and return an array of objects.
* In CFF an INDEX is a structure with the following format:
* {
* count: 2 bytes (Number of objects stored in INDEX),
* offsize: 1 byte (Offset array element size),
* offset: [count + 1] bytes (Offsets array),
* data: - (Objects data)
* }
*
* More explanation are given in the 'CFF Font Format Specification',
* chapter 5.
*/
function readFontIndexData(aStream, aIsByte) {
var count = aStream.getByte() << 8 | aStream.getByte();
var offsize = aStream.getByte();
function getNextOffset() {
switch (offsize) {
case 0:
return 0;
case 1:
return aStream.getByte();
case 2:
return aStream.getByte() << 8 | aStream.getByte();
case 3:
return aStream.getByte() << 16 | aStream.getByte() << 8 |
aStream.getByte();
case 4:
return aStream.getByte() << 24 | aStream.getByte() << 16 |
aStream.getByte() << 8 | aStream.getByte();
}
error(offsize + ' is not a valid offset size');
return null;
}
var offsets = [];
for (var i = 0; i < count + 1; i++)
offsets.push(getNextOffset());
dump('Found ' + count + ' objects at offsets :' +
offsets + ' (offsize: ' + offsize + ')');
// Now extract the objects
var relativeOffset = aStream.pos;
var objects = [];
for (var i = 0; i < count; i++) {
var offset = offsets[i];
aStream.pos = relativeOffset + offset - 1;
var data = [];
var length = offsets[i + 1] - 1;
for (var j = offset - 1; j < length; j++)
data.push(aIsByte ? aStream.getByte() : aStream.getChar());
objects.push(data);
}
return objects;
}
var Type2Parser = function type2Parser(aFilePath) {
var font = new Dict();
var xhr = new XMLHttpRequest();
xhr.open('GET', aFilePath, false);
xhr.mozResponseType = xhr.responseType = 'arraybuffer';
xhr.expected = (document.URL.indexOf('file:') === 0) ? 0 : 200;
xhr.send(null);
this.data = new Stream(xhr.mozResponseArrayBuffer || xhr.mozResponse ||
xhr.responseArrayBuffer || xhr.response);
// Turn on this flag for additional debugging logs
var debug = false;
function dump(aStr) {
if (debug)
log(aStr);
}
function parseAsToken(aString, aMap) {
var decoded = readFontDictData(aString, aMap);
var stack = [];
var count = decoded.length;
for (var i = 0; i < count; i++) {
var token = decoded[i];
if (isNum(token)) {
stack.push(token);
} else {
switch (token.operand) {
case 'SID':
font.set(token.name, CFFStrings[stack.pop()]);
break;
case 'number number':
font.set(token.name, {
offset: stack.pop(),
size: stack.pop()
});
break;
case 'boolean':
font.set(token.name, stack.pop());
break;
case 'delta':
font.set(token.name, stack.pop());
break;
default:
if (token.operand && token.operand.length) {
var array = [];
for (var j = 0; j < token.operand.length; j++)
array.push(stack.pop());
font.set(token.name, array);
} else {
font.set(token.name, stack.pop());
}
break;
}
}
}
}
this.parse = function type2ParserParse(aStream) {
font.set('major', aStream.getByte());
font.set('minor', aStream.getByte());
font.set('hdrSize', aStream.getByte());
font.set('offsize', aStream.getByte());
// Read the NAME Index
dump('Reading Index: Names');
font.set('Names', readFontIndexData(aStream));
dump('Names: ' + font.get('Names'));
// Read the Top Dict Index
dump('Reading Index: TopDict');
var topDict = readFontIndexData(aStream, true);
dump('TopDict: ' + topDict);
// Read the String Index
dump('Reading Index: Strings');
var strings = readFontIndexData(aStream);
dump('strings: ' + strings);
// Fill up the Strings dictionary with the new unique strings
for (var i = 0; i < strings.length; i++)
CFFStrings.push(strings[i].join(''));
// Parse the TopDict operator
var objects = [];
var count = topDict.length;
for (var i = 0; i < count; i++)
parseAsToken(topDict[i], CFFDictDataMap);
// Read the Global Subr Index that comes just after the Strings Index
// (cf. "The Compact Font Format Specification" Chapter 16)
dump('Reading Global Subr Index');
var subrs = readFontIndexData(aStream, true);
dump(subrs);
// Reading Private Dict
var priv = font.get('Private');
dump('Reading Private Dict (offset: ' + priv.offset +
' size: ' + priv.size + ')');
aStream.pos = priv.offset;
var privateDict = [];
for (var i = 0; i < priv.size; i++)
privateDict.push(aStream.getByte());
dump('privateData:' + privateDict);
parseAsToken(privateDict, CFFDictPrivateDataMap);
for (var p in font.map)
dump(p + '::' + font.get(p));
// Read CharStrings Index
var charStringsOffset = font.get('CharStrings');
dump('Read CharStrings Index (offset: ' + charStringsOffset + ')');
aStream.pos = charStringsOffset;
var charStrings = readFontIndexData(aStream, true);
// Read Charset
dump('Read Charset for ' + charStrings.length + ' glyphs');
var charsetEntry = font.get('charset');
if (charsetEntry === 0) {
error('Need to support CFFISOAdobeCharset');
} else if (charsetEntry == 1) {
error('Need to support CFFExpert');
} else if (charsetEntry == 2) {
error('Need to support CFFExpertSubsetCharset');
} else {
aStream.pos = charsetEntry;
var charset = readCharset(aStream, charStrings);
}
};
};
/*
* To try the Type2 decoder on a local file in the current directory:
*
* var cff = new Type2Parser("file.cff");
* cff.parse(this.data);
*
* To try the Type2 decoder on a custom built CFF array:
*
* var file = new Uint8Array(cffFileArray, 0, cffFileSize);
* var parser = new Type2Parser();
* parser.parse(new Stream(file));
*
*/
/*
* Write to a file to the disk (works only on Firefox in privilege mode)
* but this is useful for dumping a font file to the disk and check with
* fontforge or the ots program what's wrong with the file.
*
* writeToFile(fontData, "/tmp/pdf.js." + fontCount + ".cff");
*/
function writeToFile(aBytes, aFilePath) {
if (!('netscape' in window))
return;
netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
var Cc = Components.classes,
Ci = Components.interfaces;
var file = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsILocalFile);
file.initWithPath(aFilePath);
var stream = Cc['@mozilla.org/network/file-output-stream;1']
.createInstance(Ci.nsIFileOutputStream);
stream.init(file, 0x04 | 0x08 | 0x20, 0x180, 0);
var bos = Cc['@mozilla.org/binaryoutputstream;1']
.createInstance(Ci.nsIBinaryOutputStream);
bos.setOutputStream(stream);
bos.writeByteArray(aBytes, aBytes.length);
stream.close();
}

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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* globals EOF, error, isArray, isBool, Lexer, TODO */
/* Copyright 2012 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
var PDFFunction = (function PDFFunctionClosure() {
var CONSTRUCT_SAMPLED = 0;
var CONSTRUCT_INTERPOLATED = 2;
var CONSTRUCT_STICHED = 3;
var CONSTRUCT_POSTSCRIPT = 4;
return {
getSampleArray: function PDFFunction_getSampleArray(size, outputSize, bps,
str) {
var length = 1;
for (var i = 0, ii = size.length; i < ii; i++)
length *= size[i];
length *= outputSize;
var array = [];
var codeSize = 0;
var codeBuf = 0;
// 32 is a valid bps so shifting won't work
var sampleMul = 1.0 / (Math.pow(2.0, bps) - 1);
var strBytes = str.getBytes((length * bps + 7) / 8);
var strIdx = 0;
for (var i = 0; i < length; i++) {
while (codeSize < bps) {
codeBuf <<= 8;
codeBuf |= strBytes[strIdx++];
codeSize += 8;
}
codeSize -= bps;
array.push((codeBuf >> codeSize) * sampleMul);
codeBuf &= (1 << codeSize) - 1;
}
return array;
},
getIR: function PDFFunction_getIR(xref, fn) {
var dict = fn.dict;
if (!dict)
dict = fn;
var types = [this.constructSampled,
null,
this.constructInterpolated,
this.constructStiched,
this.constructPostScript];
var typeNum = dict.get('FunctionType');
var typeFn = types[typeNum];
if (!typeFn)
error('Unknown type of function');
return typeFn.call(this, fn, dict, xref);
},
fromIR: function PDFFunction_fromIR(IR) {
var type = IR[0];
switch (type) {
case CONSTRUCT_SAMPLED:
return this.constructSampledFromIR(IR);
case CONSTRUCT_INTERPOLATED:
return this.constructInterpolatedFromIR(IR);
case CONSTRUCT_STICHED:
return this.constructStichedFromIR(IR);
//case CONSTRUCT_POSTSCRIPT:
default:
return this.constructPostScriptFromIR(IR);
}
},
parse: function PDFFunction_parse(xref, fn) {
var IR = this.getIR(xref, fn);
return this.fromIR(IR);
},
constructSampled: function PDFFunction_constructSampled(str, dict) {
function toMultiArray(arr) {
var inputLength = arr.length;
var outputLength = arr.length / 2;
var out = [];
var index = 0;
for (var i = 0; i < inputLength; i += 2) {
out[index] = [arr[i], arr[i + 1]];
++index;
}
return out;
}
var domain = dict.get('Domain');
var range = dict.get('Range');
if (!domain || !range)
error('No domain or range');
var inputSize = domain.length / 2;
var outputSize = range.length / 2;
domain = toMultiArray(domain);
range = toMultiArray(range);
var size = dict.get('Size');
var bps = dict.get('BitsPerSample');
var order = dict.get('Order') || 1;
if (order !== 1) {
// No description how cubic spline interpolation works in PDF32000:2008
// As in poppler, ignoring order, linear interpolation may work as good
TODO('No support for cubic spline interpolation: ' + order);
}
var encode = dict.get('Encode');
if (!encode) {
encode = [];
for (var i = 0; i < inputSize; ++i) {
encode.push(0);
encode.push(size[i] - 1);
}
}
encode = toMultiArray(encode);
var decode = dict.get('Decode');
if (!decode)
decode = range;
else
decode = toMultiArray(decode);
var samples = this.getSampleArray(size, outputSize, bps, str);
return [
CONSTRUCT_SAMPLED, inputSize, domain, encode, decode, samples, size,
outputSize, Math.pow(2, bps) - 1, range
];
},
constructSampledFromIR: function PDFFunction_constructSampledFromIR(IR) {
// See chapter 3, page 109 of the PDF reference
function interpolate(x, xmin, xmax, ymin, ymax) {
return ymin + ((x - xmin) * ((ymax - ymin) / (xmax - xmin)));
}
return function constructSampledFromIRResult(args) {
// See chapter 3, page 110 of the PDF reference.
var m = IR[1];
var domain = IR[2];
var encode = IR[3];
var decode = IR[4];
var samples = IR[5];
var size = IR[6];
var n = IR[7];
var mask = IR[8];
var range = IR[9];
if (m != args.length)
error('Incorrect number of arguments: ' + m + ' != ' +
args.length);
var x = args;
// Building the cube vertices: its part and sample index
// http://rjwagner49.com/Mathematics/Interpolation.pdf
var cubeVertices = 1 << m;
var cubeN = new Float64Array(cubeVertices);
var cubeVertex = new Uint32Array(cubeVertices);
for (var j = 0; j < cubeVertices; j++)
cubeN[j] = 1;
var k = n, pos = 1;
// Map x_i to y_j for 0 <= i < m using the sampled function.
for (var i = 0; i < m; ++i) {
// x_i' = min(max(x_i, Domain_2i), Domain_2i+1)
var domain_2i = domain[i][0];
var domain_2i_1 = domain[i][1];
var xi = Math.min(Math.max(x[i], domain_2i), domain_2i_1);
// e_i = Interpolate(x_i', Domain_2i, Domain_2i+1,
// Encode_2i, Encode_2i+1)
var e = interpolate(xi, domain_2i, domain_2i_1,
encode[i][0], encode[i][1]);
// e_i' = min(max(e_i, 0), Size_i - 1)
var size_i = size[i];
e = Math.min(Math.max(e, 0), size_i - 1);
// Adjusting the cube: N and vertex sample index
var e0 = e < size_i - 1 ? Math.floor(e) : e - 1; // e1 = e0 + 1;
var n0 = e0 + 1 - e; // (e1 - e) / (e1 - e0);
var n1 = e - e0; // (e - e0) / (e1 - e0);
var offset0 = e0 * k;
var offset1 = offset0 + k; // e1 * k
for (var j = 0; j < cubeVertices; j++) {
if (j & pos) {
cubeN[j] *= n1;
cubeVertex[j] += offset1;
} else {
cubeN[j] *= n0;
cubeVertex[j] += offset0;
}
}
k *= size_i;
pos <<= 1;
}
var y = new Float64Array(n);
for (var j = 0; j < n; ++j) {
// Sum all cube vertices' samples portions
var rj = 0;
for (var i = 0; i < cubeVertices; i++)
rj += samples[cubeVertex[i] + j] * cubeN[i];
// r_j' = Interpolate(r_j, 0, 2^BitsPerSample - 1,
// Decode_2j, Decode_2j+1)
rj = interpolate(rj, 0, 1, decode[j][0], decode[j][1]);
// y_j = min(max(r_j, range_2j), range_2j+1)
y[j] = Math.min(Math.max(rj, range[j][0]), range[j][1]);
}
return y;
};
},
constructInterpolated: function PDFFunction_constructInterpolated(str,
dict) {
var c0 = dict.get('C0') || [0];
var c1 = dict.get('C1') || [1];
var n = dict.get('N');
if (!isArray(c0) || !isArray(c1))
error('Illegal dictionary for interpolated function');
var length = c0.length;
var diff = [];
for (var i = 0; i < length; ++i)
diff.push(c1[i] - c0[i]);
return [CONSTRUCT_INTERPOLATED, c0, diff, n];
},
constructInterpolatedFromIR:
function PDFFunction_constructInterpolatedFromIR(IR) {
var c0 = IR[1];
var diff = IR[2];
var n = IR[3];
var length = diff.length;
return function constructInterpolatedFromIRResult(args) {
var x = n == 1 ? args[0] : Math.pow(args[0], n);
var out = [];
for (var j = 0; j < length; ++j)
out.push(c0[j] + (x * diff[j]));
return out;
};
},
constructStiched: function PDFFunction_constructStiched(fn, dict, xref) {
var domain = dict.get('Domain');
if (!domain)
error('No domain');
var inputSize = domain.length / 2;
if (inputSize != 1)
error('Bad domain for stiched function');
var fnRefs = dict.get('Functions');
var fns = [];
for (var i = 0, ii = fnRefs.length; i < ii; ++i)
fns.push(PDFFunction.getIR(xref, xref.fetchIfRef(fnRefs[i])));
var bounds = dict.get('Bounds');
var encode = dict.get('Encode');
return [CONSTRUCT_STICHED, domain, bounds, encode, fns];
},
constructStichedFromIR: function PDFFunction_constructStichedFromIR(IR) {
var domain = IR[1];
var bounds = IR[2];
var encode = IR[3];
var fnsIR = IR[4];
var fns = [];
for (var i = 0, ii = fnsIR.length; i < ii; i++) {
fns.push(PDFFunction.fromIR(fnsIR[i]));
}
return function constructStichedFromIRResult(args) {
var clip = function constructStichedFromIRClip(v, min, max) {
if (v > max)
v = max;
else if (v < min)
v = min;
return v;
};
// clip to domain
var v = clip(args[0], domain[0], domain[1]);
// calulate which bound the value is in
for (var i = 0, ii = bounds.length; i < ii; ++i) {
if (v < bounds[i])
break;
}
// encode value into domain of function
var dmin = domain[0];
if (i > 0)
dmin = bounds[i - 1];
var dmax = domain[1];
if (i < bounds.length)
dmax = bounds[i];
var rmin = encode[2 * i];
var rmax = encode[2 * i + 1];
var v2 = rmin + (v - dmin) * (rmax - rmin) / (dmax - dmin);
// call the appropropriate function
return fns[i]([v2]);
};
},
constructPostScript: function PDFFunction_constructPostScript(fn, dict,
xref) {
var domain = dict.get('Domain');
var range = dict.get('Range');
if (!domain)
error('No domain.');
if (!range)
error('No range.');
var lexer = new PostScriptLexer(fn);
var parser = new PostScriptParser(lexer);
var code = parser.parse();
return [CONSTRUCT_POSTSCRIPT, domain, range, code];
},
constructPostScriptFromIR: function PDFFunction_constructPostScriptFromIR(
IR) {
var domain = IR[1];
var range = IR[2];
var code = IR[3];
var numOutputs = range.length / 2;
var evaluator = new PostScriptEvaluator(code);
// Cache the values for a big speed up, the cache size is limited though
// since the number of possible values can be huge from a PS function.
var cache = new FunctionCache();
return function constructPostScriptFromIRResult(args) {
var initialStack = [];
for (var i = 0, ii = (domain.length / 2); i < ii; ++i) {
initialStack.push(args[i]);
}
var key = initialStack.join('_');
if (cache.has(key))
return cache.get(key);
var stack = evaluator.execute(initialStack);
var transformed = [];
for (i = numOutputs - 1; i >= 0; --i) {
var out = stack.pop();
var rangeIndex = 2 * i;
if (out < range[rangeIndex])
out = range[rangeIndex];
else if (out > range[rangeIndex + 1])
out = range[rangeIndex + 1];
transformed[i] = out;
}
cache.set(key, transformed);
return transformed;
};
}
};
})();
var FunctionCache = (function FunctionCacheClosure() {
// Of 10 PDF's with type4 functions the maxium number of distinct values seen
// was 256. This still may need some tweaking in the future though.
var MAX_CACHE_SIZE = 1024;
function FunctionCache() {
this.cache = {};
this.total = 0;
}
FunctionCache.prototype = {
has: function FunctionCache_has(key) {
return key in this.cache;
},
get: function FunctionCache_get(key) {
return this.cache[key];
},
set: function FunctionCache_set(key, value) {
if (this.total < MAX_CACHE_SIZE) {
this.cache[key] = value;
this.total++;
}
}
};
return FunctionCache;
})();
var PostScriptStack = (function PostScriptStackClosure() {
var MAX_STACK_SIZE = 100;
function PostScriptStack(initialStack) {
this.stack = initialStack || [];
}
PostScriptStack.prototype = {
push: function PostScriptStack_push(value) {
if (this.stack.length >= MAX_STACK_SIZE)
error('PostScript function stack overflow.');
this.stack.push(value);
},
pop: function PostScriptStack_pop() {
if (this.stack.length <= 0)
error('PostScript function stack underflow.');
return this.stack.pop();
},
copy: function PostScriptStack_copy(n) {
if (this.stack.length + n >= MAX_STACK_SIZE)
error('PostScript function stack overflow.');
var stack = this.stack;
for (var i = stack.length - n, j = n - 1; j >= 0; j--, i++)
stack.push(stack[i]);
},
index: function PostScriptStack_index(n) {
this.push(this.stack[this.stack.length - n - 1]);
},
// rotate the last n stack elements p times
roll: function PostScriptStack_roll(n, p) {
var stack = this.stack;
var l = stack.length - n;
var r = stack.length - 1, c = l + (p - Math.floor(p / n) * n), i, j, t;
for (i = l, j = r; i < j; i++, j--) {
t = stack[i]; stack[i] = stack[j]; stack[j] = t;
}
for (i = l, j = c - 1; i < j; i++, j--) {
t = stack[i]; stack[i] = stack[j]; stack[j] = t;
}
for (i = c, j = r; i < j; i++, j--) {
t = stack[i]; stack[i] = stack[j]; stack[j] = t;
}
}
};
return PostScriptStack;
})();
var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
function PostScriptEvaluator(operators, operands) {
this.operators = operators;
this.operands = operands;
}
PostScriptEvaluator.prototype = {
execute: function PostScriptEvaluator_execute(initialStack) {
var stack = new PostScriptStack(initialStack);
var counter = 0;
var operators = this.operators;
var length = operators.length;
var operator, a, b;
while (counter < length) {
operator = operators[counter++];
if (typeof operator == 'number') {
// Operator is really an operand and should be pushed to the stack.
stack.push(operator);
continue;
}
switch (operator) {
// non standard ps operators
case 'jz': // jump if false
b = stack.pop();
a = stack.pop();
if (!a)
counter = b;
break;
case 'j': // jump
a = stack.pop();
counter = a;
break;
// all ps operators in alphabetical order (excluding if/ifelse)
case 'abs':
a = stack.pop();
stack.push(Math.abs(a));
break;
case 'add':
b = stack.pop();
a = stack.pop();
stack.push(a + b);
break;
case 'and':
b = stack.pop();
a = stack.pop();
if (isBool(a) && isBool(b))
stack.push(a && b);
else
stack.push(a & b);
break;
case 'atan':
a = stack.pop();
stack.push(Math.atan(a));
break;
case 'bitshift':
b = stack.pop();
a = stack.pop();
if (a > 0)
stack.push(a << b);
else
stack.push(a >> b);
break;
case 'ceiling':
a = stack.pop();
stack.push(Math.ceil(a));
break;
case 'copy':
a = stack.pop();
stack.copy(a);
break;
case 'cos':
a = stack.pop();
stack.push(Math.cos(a));
break;
case 'cvi':
a = stack.pop() | 0;
stack.push(a);
break;
case 'cvr':
// noop
break;
case 'div':
b = stack.pop();
a = stack.pop();
stack.push(a / b);
break;
case 'dup':
stack.copy(1);
break;
case 'eq':
b = stack.pop();
a = stack.pop();
stack.push(a == b);
break;
case 'exch':
stack.roll(2, 1);
break;
case 'exp':
b = stack.pop();
a = stack.pop();
stack.push(Math.pow(a, b));
break;
case 'false':
stack.push(false);
break;
case 'floor':
a = stack.pop();
stack.push(Math.floor(a));
break;
case 'ge':
b = stack.pop();
a = stack.pop();
stack.push(a >= b);
break;
case 'gt':
b = stack.pop();
a = stack.pop();
stack.push(a > b);
break;
case 'idiv':
b = stack.pop();
a = stack.pop();
stack.push((a / b) | 0);
break;
case 'index':
a = stack.pop();
stack.index(a);
break;
case 'le':
b = stack.pop();
a = stack.pop();
stack.push(a <= b);
break;
case 'ln':
a = stack.pop();
stack.push(Math.log(a));
break;
case 'log':
a = stack.pop();
stack.push(Math.log(a) / Math.LN10);
break;
case 'lt':
b = stack.pop();
a = stack.pop();
stack.push(a < b);
break;
case 'mod':
b = stack.pop();
a = stack.pop();
stack.push(a % b);
break;
case 'mul':
b = stack.pop();
a = stack.pop();
stack.push(a * b);
break;
case 'ne':
b = stack.pop();
a = stack.pop();
stack.push(a != b);
break;
case 'neg':
a = stack.pop();
stack.push(-b);
break;
case 'not':
a = stack.pop();
if (isBool(a) && isBool(b))
stack.push(a && b);
else
stack.push(a & b);
break;
case 'or':
b = stack.pop();
a = stack.pop();
if (isBool(a) && isBool(b))
stack.push(a || b);
else
stack.push(a | b);
break;
case 'pop':
stack.pop();
break;
case 'roll':
b = stack.pop();
a = stack.pop();
stack.roll(a, b);
break;
case 'round':
a = stack.pop();
stack.push(Math.round(a));
break;
case 'sin':
a = stack.pop();
stack.push(Math.sin(a));
break;
case 'sqrt':
a = stack.pop();
stack.push(Math.sqrt(a));
break;
case 'sub':
b = stack.pop();
a = stack.pop();
stack.push(a - b);
break;
case 'true':
stack.push(true);
break;
case 'truncate':
a = stack.pop();
a = a < 0 ? Math.ceil(a) : Math.floor(a);
stack.push(a);
break;
case 'xor':
b = stack.pop();
a = stack.pop();
if (isBool(a) && isBool(b))
stack.push(a != b);
else
stack.push(a ^ b);
break;
default:
error('Unknown operator ' + operator);
break;
}
}
return stack.stack;
}
};
return PostScriptEvaluator;
})();
var PostScriptParser = (function PostScriptParserClosure() {
function PostScriptParser(lexer) {
this.lexer = lexer;
this.operators = [];
this.token = null;
this.prev = null;
}
PostScriptParser.prototype = {
nextToken: function PostScriptParser_nextToken() {
this.prev = this.token;
this.token = this.lexer.getToken();
},
accept: function PostScriptParser_accept(type) {
if (this.token.type == type) {
this.nextToken();
return true;
}
return false;
},
expect: function PostScriptParser_expect(type) {
if (this.accept(type))
return true;
error('Unexpected symbol: found ' + this.token.type + ' expected ' +
type + '.');
},
parse: function PostScriptParser_parse() {
this.nextToken();
this.expect(PostScriptTokenTypes.LBRACE);
this.parseBlock();
this.expect(PostScriptTokenTypes.RBRACE);
return this.operators;
},
parseBlock: function PostScriptParser_parseBlock() {
while (true) {
if (this.accept(PostScriptTokenTypes.NUMBER)) {
this.operators.push(this.prev.value);
} else if (this.accept(PostScriptTokenTypes.OPERATOR)) {
this.operators.push(this.prev.value);
} else if (this.accept(PostScriptTokenTypes.LBRACE)) {
this.parseCondition();
} else {
return;
}
}
},
parseCondition: function PostScriptParser_parseCondition() {
// Add two place holders that will be updated later
var conditionLocation = this.operators.length;
this.operators.push(null, null);
this.parseBlock();
this.expect(PostScriptTokenTypes.RBRACE);
if (this.accept(PostScriptTokenTypes.IF)) {
// The true block is right after the 'if' so it just falls through on
// true else it jumps and skips the true block.
this.operators[conditionLocation] = this.operators.length;
this.operators[conditionLocation + 1] = 'jz';
} else if (this.accept(PostScriptTokenTypes.LBRACE)) {
var jumpLocation = this.operators.length;
this.operators.push(null, null);
var endOfTrue = this.operators.length;
this.parseBlock();
this.expect(PostScriptTokenTypes.RBRACE);
this.expect(PostScriptTokenTypes.IFELSE);
// The jump is added at the end of the true block to skip the false
// block.
this.operators[jumpLocation] = this.operators.length;
this.operators[jumpLocation + 1] = 'j';
this.operators[conditionLocation] = endOfTrue;
this.operators[conditionLocation + 1] = 'jz';
} else {
error('PS Function: error parsing conditional.');
}
}
};
return PostScriptParser;
})();
var PostScriptTokenTypes = {
LBRACE: 0,
RBRACE: 1,
NUMBER: 2,
OPERATOR: 3,
IF: 4,
IFELSE: 5
};
var PostScriptToken = (function PostScriptTokenClosure() {
function PostScriptToken(type, value) {
this.type = type;
this.value = value;
}
var opCache = {};
PostScriptToken.getOperator = function PostScriptToken_getOperator(op) {
var opValue = opCache[op];
if (opValue)
return opValue;
return opCache[op] = new PostScriptToken(PostScriptTokenTypes.OPERATOR, op);
};
PostScriptToken.LBRACE = new PostScriptToken(PostScriptTokenTypes.LBRACE,
'{');
PostScriptToken.RBRACE = new PostScriptToken(PostScriptTokenTypes.RBRACE,
'}');
PostScriptToken.IF = new PostScriptToken(PostScriptTokenTypes.IF, 'IF');
PostScriptToken.IFELSE = new PostScriptToken(PostScriptTokenTypes.IFELSE,
'IFELSE');
return PostScriptToken;
})();
var PostScriptLexer = (function PostScriptLexerClosure() {
function PostScriptLexer(stream) {
this.stream = stream;
this.nextChar();
}
PostScriptLexer.prototype = {
nextChar: function PostScriptLexer_nextChar() {
return (this.currentChar = this.stream.getByte());
},
getToken: function PostScriptLexer_getToken() {
var s = '';
var comment = false;
var ch = this.currentChar;
// skip comments
while (true) {
if (ch < 0) {
return EOF;
}
if (comment) {
if (ch === 0x0A || ch === 0x0D) {
comment = false;
}
} else if (ch == 0x25) { // '%'
comment = true;
} else if (!Lexer.isSpace(ch)) {
break;
}
ch = this.nextChar();
}
switch (ch | 0) {
case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: // '0'-'4'
case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: // '5'-'9'
case 0x2B: case 0x2D: case 0x2E: // '+', '-', '.'
return new PostScriptToken(PostScriptTokenTypes.NUMBER,
this.getNumber());
case 0x7B: // '{'
this.nextChar();
return PostScriptToken.LBRACE;
case 0x7D: // '}'
this.nextChar();
return PostScriptToken.RBRACE;
}
// operator
var str = String.fromCharCode(ch);
while ((ch = this.nextChar()) >= 0 && // and 'A'-'Z', 'a'-'z'
((ch >= 0x41 && ch <= 0x5A) || (ch >= 0x61 && ch <= 0x7A))) {
str += String.fromCharCode(ch);
}
switch (str.toLowerCase()) {
case 'if':
return PostScriptToken.IF;
case 'ifelse':
return PostScriptToken.IFELSE;
default:
return PostScriptToken.getOperator(str);
}
},
getNumber: function PostScriptLexer_getNumber() {
var ch = this.currentChar;
var str = String.fromCharCode(ch);
while ((ch = this.nextChar()) >= 0) {
if ((ch >= 0x30 && ch <= 0x39) || // '0'-'9'
ch === 0x2D || ch === 0x2E) { // '-', '.'
str += String.fromCharCode(ch);
} else {
break;
}
}
var value = parseFloat(str);
if (isNaN(value))
error('Invalid floating point number: ' + value);
return value;
}
};
return PostScriptLexer;
})();

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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* Copyright 2012 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* globals CanvasGraphics, ColorSpace, DeviceRgbCS, error,
info, isArray, isPDFFunction, isStream, PDFFunction, TODO, Util,
warn, CachedCanvases */
'use strict';
var PatternType = {
AXIAL: 2,
RADIAL: 3
};
var Pattern = (function PatternClosure() {
// Constructor should define this.getPattern
function Pattern() {
error('should not call Pattern constructor');
}
Pattern.prototype = {
// Input: current Canvas context
// Output: the appropriate fillStyle or strokeStyle
getPattern: function Pattern_getPattern(ctx) {
error('Should not call Pattern.getStyle: ' + ctx);
}
};
Pattern.shadingFromIR = function Pattern_shadingFromIR(raw) {
return Shadings[raw[0]].fromIR(raw);
};
Pattern.parseShading = function Pattern_parseShading(shading, matrix, xref,
res) {
var dict = isStream(shading) ? shading.dict : shading;
var type = dict.get('ShadingType');
switch (type) {
case PatternType.AXIAL:
case PatternType.RADIAL:
// Both radial and axial shadings are handled by RadialAxial shading.
return new Shadings.RadialAxial(dict, matrix, xref, res);
default:
TODO('Unsupported shading type: ' + type);
return new Shadings.Dummy();
}
};
return Pattern;
})();
var Shadings = {};
// A small number to offset the first/last color stops so we can insert ones to
// support extend. Number.MIN_VALUE appears to be too small and breaks the
// extend. 1e-7 works in FF but chrome seems to use an even smaller sized number
// internally so we have to go bigger.
Shadings.SMALL_NUMBER = 1e-2;
// Radial and axial shading have very similar implementations
// If needed, the implementations can be broken into two classes
Shadings.RadialAxial = (function RadialAxialClosure() {
function RadialAxial(dict, matrix, xref, res, ctx) {
this.matrix = matrix;
this.coordsArr = dict.get('Coords');
this.shadingType = dict.get('ShadingType');
this.type = 'Pattern';
this.ctx = ctx;
var cs = dict.get('ColorSpace', 'CS');
cs = ColorSpace.parse(cs, xref, res);
this.cs = cs;
var t0 = 0.0, t1 = 1.0;
if (dict.has('Domain')) {
var domainArr = dict.get('Domain');
t0 = domainArr[0];
t1 = domainArr[1];
}
var extendStart = false, extendEnd = false;
if (dict.has('Extend')) {
var extendArr = dict.get('Extend');
extendStart = extendArr[0];
extendEnd = extendArr[1];
}
if (this.shadingType === PatternType.RADIAL &&
(!extendStart || !extendEnd)) {
// Radial gradient only currently works if either circle is fully within
// the other circle.
var x1 = this.coordsArr[0];
var y1 = this.coordsArr[1];
var r1 = this.coordsArr[2];
var x2 = this.coordsArr[3];
var y2 = this.coordsArr[4];
var r2 = this.coordsArr[5];
var distance = Math.sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
if (r1 <= r2 + distance &&
r2 <= r1 + distance) {
warn('Unsupported radial gradient.');
}
}
this.extendStart = extendStart;
this.extendEnd = extendEnd;
var fnObj = dict.get('Function');
var fn;
if (isArray(fnObj)) {
var fnArray = [];
for (var j = 0, jj = fnObj.length; j < jj; j++) {
var obj = xref.fetchIfRef(fnObj[j]);
if (!isPDFFunction(obj)) {
error('Invalid function');
}
fnArray.push(PDFFunction.parse(xref, obj));
}
fn = function radialAxialColorFunction(arg) {
var out = [];
for (var i = 0, ii = fnArray.length; i < ii; i++) {
out.push(fnArray[i](arg)[0]);
}
return out;
};
} else {
if (!isPDFFunction(fnObj)) {
error('Invalid function');
}
fn = PDFFunction.parse(xref, fnObj);
}
// 10 samples seems good enough for now, but probably won't work
// if there are sharp color changes. Ideally, we would implement
// the spec faithfully and add lossless optimizations.
var diff = t1 - t0;
var step = diff / 10;
var colorStops = this.colorStops = [];
// Protect against bad domains so we don't end up in an infinte loop below.
if (t0 >= t1 || step <= 0) {
// Acrobat doesn't seem to handle these cases so we'll ignore for
// now.
info('Bad shading domain.');
return;
}
for (var i = t0; i <= t1; i += step) {
var rgbColor = cs.getRgb(fn([i]), 0);
var cssColor = Util.makeCssRgb(rgbColor);
colorStops.push([(i - t0) / diff, cssColor]);
}
var background = 'transparent';
if (dict.has('Background')) {
var rgbColor = cs.getRgb(dict.get('Background'), 0);
background = Util.makeCssRgb(rgbColor);
}
if (!extendStart) {
// Insert a color stop at the front and offset the first real color stop
// so it doesn't conflict with the one we insert.
colorStops.unshift([0, background]);
colorStops[1][0] += Shadings.SMALL_NUMBER;
}
if (!extendEnd) {
// Same idea as above in extendStart but for the end.
colorStops[colorStops.length - 1][0] -= Shadings.SMALL_NUMBER;
colorStops.push([1, background]);
}
this.colorStops = colorStops;
}
RadialAxial.fromIR = function RadialAxial_fromIR(raw) {
var type = raw[1];
var colorStops = raw[2];
var p0 = raw[3];
var p1 = raw[4];
var r0 = raw[5];
var r1 = raw[6];
return {
type: 'Pattern',
getPattern: function RadialAxial_getPattern(ctx) {
var grad;
if (type == PatternType.AXIAL)
grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]);
else if (type == PatternType.RADIAL)
grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1);
for (var i = 0, ii = colorStops.length; i < ii; ++i) {
var c = colorStops[i];
grad.addColorStop(c[0], c[1]);
}
return grad;
}
};
};
RadialAxial.prototype = {
getIR: function RadialAxial_getIR() {
var coordsArr = this.coordsArr;
var type = this.shadingType;
if (type == PatternType.AXIAL) {
var p0 = [coordsArr[0], coordsArr[1]];
var p1 = [coordsArr[2], coordsArr[3]];
var r0 = null;
var r1 = null;
} else if (type == PatternType.RADIAL) {
var p0 = [coordsArr[0], coordsArr[1]];
var p1 = [coordsArr[3], coordsArr[4]];
var r0 = coordsArr[2];
var r1 = coordsArr[5];
} else {
error('getPattern type unknown: ' + type);
}
var matrix = this.matrix;
if (matrix) {
p0 = Util.applyTransform(p0, matrix);
p1 = Util.applyTransform(p1, matrix);
}
return ['RadialAxial', type, this.colorStops, p0, p1, r0, r1];
}
};
return RadialAxial;
})();
Shadings.Dummy = (function DummyClosure() {
function Dummy() {
this.type = 'Pattern';
}
Dummy.fromIR = function Dummy_fromIR() {
return {
type: 'Pattern',
getPattern: function Dummy_fromIR_getPattern() {
return 'hotpink';
}
};
};
Dummy.prototype = {
getIR: function Dummy_getIR() {
return ['Dummy'];
}
};
return Dummy;
})();
var TilingPattern = (function TilingPatternClosure() {
var PaintType = {
COLORED: 1,
UNCOLORED: 2
};
var MAX_PATTERN_SIZE = 8192;
function TilingPattern(IR, color, ctx, objs, commonObjs, baseTransform) {
this.name = IR[1][0].name;
this.operatorList = IR[2];
this.matrix = IR[3] || [1, 0, 0, 1, 0, 0];
this.bbox = IR[4];
this.xstep = IR[5];
this.ystep = IR[6];
this.paintType = IR[7];
this.tilingType = IR[8];
this.color = color;
this.objs = objs;
this.commonObjs = commonObjs;
this.baseTransform = baseTransform;
this.type = 'Pattern';
this.ctx = ctx;
}
TilingPattern.getIR = function TilingPattern_getIR(operatorList, dict, args) {
var matrix = dict.get('Matrix');
var bbox = dict.get('BBox');
var xstep = dict.get('XStep');
var ystep = dict.get('YStep');
var paintType = dict.get('PaintType');
var tilingType = dict.get('TilingType');
return [
'TilingPattern', args, operatorList, matrix, bbox, xstep, ystep,
paintType, tilingType
];
};
TilingPattern.prototype = {
createPatternCanvas: function TilinPattern_createPatternCanvas(tmpCanvas) {
var operatorList = this.operatorList;
var bbox = this.bbox;
var xstep = this.xstep;
var ystep = this.ystep;
var paintType = this.paintType;
var tilingType = this.tilingType;
var color = this.color;
var objs = this.objs;
var commonObjs = this.commonObjs;
var ctx = this.ctx;
TODO('TilingType: ' + tilingType);
var x0 = bbox[0], y0 = bbox[1], x1 = bbox[2], y1 = bbox[3];
var topLeft = [x0, y0];
// we want the canvas to be as large as the step size
var botRight = [x0 + xstep, y0 + ystep];
var width = botRight[0] - topLeft[0];
var height = botRight[1] - topLeft[1];
// Obtain scale from matrix and current transformation matrix.
var matrixScale = Util.singularValueDecompose2dScale(this.matrix);
var curMatrixScale = Util.singularValueDecompose2dScale(
this.baseTransform);
var combinedScale = [matrixScale[0] * curMatrixScale[0],
matrixScale[1] * curMatrixScale[1]];
// MAX_PATTERN_SIZE is used to avoid OOM situation.
// Use width and height values that are as close as possible to the end
// result when the pattern is used. Too low value makes the pattern look
// blurry. Too large value makes it look too crispy.
width = Math.min(Math.ceil(Math.abs(width * combinedScale[0])),
MAX_PATTERN_SIZE);
height = Math.min(Math.ceil(Math.abs(height * combinedScale[1])),
MAX_PATTERN_SIZE);
tmpCanvas.width = width;
tmpCanvas.height = height;
// set the new canvas element context as the graphics context
var tmpCtx = tmpCanvas.getContext('2d');
var graphics = new CanvasGraphics(tmpCtx, commonObjs, objs);
this.setFillAndStrokeStyleToContext(tmpCtx, paintType, color);
this.setScale(width, height, xstep, ystep);
this.transformToScale(graphics);
// transform coordinates to pattern space
var tmpTranslate = [1, 0, 0, 1, -topLeft[0], -topLeft[1]];
graphics.transform.apply(graphics, tmpTranslate);
this.clipBbox(graphics, bbox, x0, y0, x1, y1);
graphics.executeOperatorList(operatorList);
},
setScale: function TilingPattern_setScale(width, height, xstep, ystep) {
this.scale = [width / xstep, height / ystep];
},
transformToScale: function TilingPattern_transformToScale(graphics) {
var scale = this.scale;
var tmpScale = [scale[0], 0, 0, scale[1], 0, 0];
graphics.transform.apply(graphics, tmpScale);
},
scaleToContext: function TilingPattern_scaleToContext() {
var scale = this.scale;
this.ctx.scale(1 / scale[0], 1 / scale[1]);
},
clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) {
if (bbox && isArray(bbox) && 4 == bbox.length) {
var bboxWidth = x1 - x0;
var bboxHeight = y1 - y0;
graphics.rectangle(x0, y0, bboxWidth, bboxHeight);
graphics.clip();
graphics.endPath();
}
},
setFillAndStrokeStyleToContext:
function setFillAndStrokeStyleToContext(context, paintType, color) {
switch (paintType) {
case PaintType.COLORED:
var ctx = this.ctx;
context.fillStyle = ctx.fillStyle;
context.strokeStyle = ctx.strokeStyle;
break;
case PaintType.UNCOLORED:
var rgbColor = ColorSpace.singletons.rgb.getRgb(color, 0);
var cssColor = Util.makeCssRgb(rgbColor);
context.fillStyle = cssColor;
context.strokeStyle = cssColor;
break;
default:
error('Unsupported paint type: ' + paintType);
}
},
getPattern: function TilingPattern_getPattern() {
var temporaryPatternCanvas = CachedCanvases.getCanvas('pattern');
this.createPatternCanvas(temporaryPatternCanvas);
var ctx = this.ctx;
ctx.setTransform.apply(ctx, this.baseTransform);
ctx.transform.apply(ctx, this.matrix);
this.scaleToContext();
return ctx.createPattern(temporaryPatternCanvas, 'repeat');
}
};
return TilingPattern;
})();

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