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canvas.js
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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.
*/
'use strict';
// <canvas> contexts store most of the state we need natively.
// However, PDF needs a bit more state, which we store here.
var TextRenderingMode = {
FILL: 0,
STROKE: 1,
FILL_STROKE: 2,
INVISIBLE: 3,
FILL_ADD_TO_PATH: 4,
STROKE_ADD_TO_PATH: 5,
FILL_STROKE_ADD_TO_PATH: 6,
ADD_TO_PATH: 7
};
// Minimal font size that would be used during canvas fillText operations.
var MIN_FONT_SIZE = 1;
//MQZ. Oct.17.2012 - moved createScratchCanvas to pdf.js to use PDFCanvas
//function createScratchCanvas(width, height) {
// var canvas = document.createElement('canvas');
// canvas.width = width;
// canvas.height = height;
// return canvas;
//}
function addContextCurrentTransform(ctx) {
// If the context doesn't expose a `mozCurrentTransform`, add a JS based on.
if (!ctx.mozCurrentTransform) {
// Store the original context
ctx._originalSave = ctx.save;
ctx._originalRestore = ctx.restore;
ctx._originalRotate = ctx.rotate;
ctx._originalScale = ctx.scale;
ctx._originalTranslate = ctx.translate;
ctx._originalTransform = ctx.transform;
ctx._transformMatrix = [1, 0, 0, 1, 0, 0];
ctx._transformStack = [];
Object.defineProperty(ctx, 'mozCurrentTransform', {
get: function getCurrentTransform() {
return this._transformMatrix;
}
});
Object.defineProperty(ctx, 'mozCurrentTransformInverse', {
get: function getCurrentTransformInverse() {
// Calculation done using WolframAlpha:
// http://www.wolframalpha.com/input/?
// i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}}
var m = this._transformMatrix;
var a = m[0], b = m[1], c = m[2], d = m[3], e = m[4], f = m[5];
var ad_bc = a * d - b * c;
var bc_ad = b * c - a * d;
return [
d / ad_bc,
b / bc_ad,
c / bc_ad,
a / ad_bc,
(d * e - c * f) / bc_ad,
(b * e - a * f) / ad_bc
];
}
});
ctx.save = function ctxSave() {
var old = this._transformMatrix;
this._transformStack.push(old);
this._transformMatrix = old.slice(0, 6);
this._originalSave();
};
ctx.restore = function ctxRestore() {
var prev = this._transformStack.pop();
if (prev) {
this._transformMatrix = prev;
this._originalRestore();
}
};
ctx.translate = function ctxTranslate(x, y) {
var m = this._transformMatrix;
m[4] = m[0] * x + m[2] * y + m[4];
m[5] = m[1] * x + m[3] * y + m[5];
this._originalTranslate(x, y);
};
ctx.scale = function ctxScale(x, y) {
var m = this._transformMatrix;
m[0] = m[0] * x;
m[1] = m[1] * x;
m[2] = m[2] * y;
m[3] = m[3] * y;
this._originalScale(x, y);
};
ctx.transform = function ctxTransform(a, b, c, d, e, f) {
var m = this._transformMatrix;
this._transformMatrix = [
m[0] * a + m[2] * b,
m[1] * a + m[3] * b,
m[0] * c + m[2] * d,
m[1] * c + m[3] * d,
m[0] * e + m[2] * f + m[4],
m[1] * e + m[3] * f + m[5]
];
ctx._originalTransform(a, b, c, d, e, f);
};
ctx.rotate = function ctxRotate(angle) {
var cosValue = Math.cos(angle);
var sinValue = Math.sin(angle);
var m = this._transformMatrix;
this._transformMatrix = [
m[0] * cosValue + m[2] * sinValue,
m[1] * cosValue + m[3] * sinValue,
m[0] * (-sinValue) + m[2] * cosValue,
m[1] * (-sinValue) + m[3] * cosValue,
m[4],
m[5]
];
this._originalRotate(angle);
};
}
}
var CanvasExtraState = (function CanvasExtraStateClosure() {
function CanvasExtraState(old) {
// Are soft masks and alpha values shapes or opacities?
this.alphaIsShape = false;
this.fontSize = 0;
this.fontSizeScale = 1;
this.textMatrix = IDENTITY_MATRIX;
this.fontMatrix = IDENTITY_MATRIX;
this.leading = 0;
// Current point (in user coordinates)
this.x = 0;
this.y = 0;
// Start of text line (in text coordinates)
this.lineX = 0;
this.lineY = 0;
// Character and word spacing
this.charSpacing = 0;
this.wordSpacing = 0;
this.textHScale = 1;
this.textRenderingMode = TextRenderingMode.FILL;
this.textRise = 0;
// Color spaces
this.fillColorSpace = new DeviceGrayCS();
this.fillColorSpaceObj = null;
this.strokeColorSpace = new DeviceGrayCS();
this.strokeColorSpaceObj = null;
this.fillColorObj = null;
this.strokeColorObj = null;
// Default fore and background colors
this.fillColor = '#000000';
this.strokeColor = '#000000';
// Note: fill alpha applies to all non-stroking operations
this.fillAlpha = 1;
this.strokeAlpha = 1;
this.lineWidth = 1;
this.old = old;
}
CanvasExtraState.prototype = {
clone: function CanvasExtraState_clone() {
return Object.create(this);
},
setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) {
this.x = x;
this.y = y;
}
};
return CanvasExtraState;
})();
var CanvasGraphics = (function CanvasGraphicsClosure() {
// Defines the time the executeOperatorList is going to be executing
// before it stops and shedules a continue of execution.
var kExecutionTime = 15;
function CanvasGraphics(canvasCtx, objs, textLayer) {
this.ctx = canvasCtx;
this.current = new CanvasExtraState();
this.stateStack = [];
this.pendingClip = null;
this.res = null;
this.xobjs = null;
this.objs = objs;
this.textLayer = textLayer;
if (canvasCtx) {
addContextCurrentTransform(canvasCtx);
}
}
var LINE_CAP_STYLES = ['butt', 'round', 'square'];
var LINE_JOIN_STYLES = ['miter', 'round', 'bevel'];
var NORMAL_CLIP = {};
var EO_CLIP = {};
CanvasGraphics.prototype = {
slowCommands: {
'stroke': true,
'closeStroke': true,
'fill': true,
'eoFill': true,
'fillStroke': true,
'eoFillStroke': true,
'closeFillStroke': true,
'closeEOFillStroke': true,
'showText': true,
'showSpacedText': true,
'setStrokeColorSpace': true,
'setFillColorSpace': true,
'setStrokeColor': true,
'setStrokeColorN': true,
'setFillColor': true,
'setFillColorN': true,
'setStrokeGray': true,
'setFillGray': true,
'setStrokeRGBColor': true,
'setFillRGBColor': true,
'setStrokeCMYKColor': true,
'setFillCMYKColor': true,
'paintJpegXObject': true,
'paintImageXObject': true,
'paintImageMaskXObject': true,
'shadingFill': true
},
beginDrawing: function CanvasGraphics_beginDrawing(viewport) {
var transform = viewport.transform;
this.ctx.save();
this.ctx.transform.apply(this.ctx, transform);
if (this.textLayer)
this.textLayer.beginLayout();
},
executeOperatorList: function CanvasGraphics_executeOperatorList(
operatorList,
executionStartIdx, continueCallback,
stepper) {
var argsArray = operatorList.argsArray;
var fnArray = operatorList.fnArray;
var i = executionStartIdx || 0;
var argsArrayLen = argsArray.length;
// Sometimes the OperatorList to execute is empty.
if (argsArrayLen == i) {
return i;
}
var executionEndIdx;
var endTime = Date.now() + kExecutionTime;
var objs = this.objs;
var fnName;
var slowCommands = this.slowCommands;
while (true) {
if (stepper && i === stepper.nextBreakPoint) {
stepper.breakIt(i, continueCallback);
return i;
}
fnName = fnArray[i];
if (fnName !== 'dependency') {
this[fnName].apply(this, argsArray[i]);
} else {
var deps = argsArray[i];
for (var n = 0, nn = deps.length; n < nn; n++) {
var depObjId = deps[n];
// If the promise isn't resolved yet, add the continueCallback
// to the promise and bail out.
if (!objs.isResolved(depObjId)) {
objs.get(depObjId, continueCallback);
return i;
}
}
}
i++;
// If the entire operatorList was executed, stop as were done.
if (i == argsArrayLen) {
return i;
}
// If the execution took longer then a certain amount of time, shedule
// to continue exeution after a short delay.
// However, this is only possible if a 'continueCallback' is passed in.
if (continueCallback && slowCommands[fnName] && Date.now() > endTime) {
setTimeout(continueCallback, 0);
return i;
}
// If the operatorList isn't executed completely yet OR the execution
// time was short enough, do another execution round.
}
},
endDrawing: function CanvasGraphics_endDrawing() {
this.ctx.restore();
if (this.textLayer)
this.textLayer.endLayout();
},
// Graphics state
setLineWidth: function CanvasGraphics_setLineWidth(width) {
this.current.lineWidth = width;
this.ctx.lineWidth = width;
},
setLineCap: function CanvasGraphics_setLineCap(style) {
this.ctx.lineCap = LINE_CAP_STYLES[style];
},
setLineJoin: function CanvasGraphics_setLineJoin(style) {
this.ctx.lineJoin = LINE_JOIN_STYLES[style];
},
setMiterLimit: function CanvasGraphics_setMiterLimit(limit) {
this.ctx.miterLimit = limit;
},
setDash: function CanvasGraphics_setDash(dashArray, dashPhase) {
this.ctx.mozDash = dashArray;
this.ctx.mozDashOffset = dashPhase;
this.ctx.webkitLineDash = dashArray;
this.ctx.webkitLineDashOffset = dashPhase;
},
setRenderingIntent: function CanvasGraphics_setRenderingIntent(intent) {
// Maybe if we one day fully support color spaces this will be important
// for now we can ignore.
// TODO set rendering intent?
},
setFlatness: function CanvasGraphics_setFlatness(flatness) {
// There's no way to control this with canvas, but we can safely ignore.
// TODO set flatness?
},
setGState: function CanvasGraphics_setGState(states) {
for (var i = 0, ii = states.length; i < ii; i++) {
var state = states[i];
var key = state[0];
var value = state[1];
switch (key) {
case 'LW':
this.setLineWidth(value);
break;
case 'LC':
this.setLineCap(value);
break;
case 'LJ':
this.setLineJoin(value);
break;
case 'ML':
this.setMiterLimit(value);
break;
case 'D':
this.setDash(value[0], value[1]);
break;
case 'RI':
this.setRenderingIntent(value);
break;
case 'FL':
this.setFlatness(value);
break;
case 'Font':
this.setFont(state[1], state[2]);
break;
case 'CA':
this.current.strokeAlpha = state[1];
break;
case 'ca':
this.current.fillAlpha = state[1];
this.ctx.globalAlpha = state[1];
break;
}
}
},
save: function CanvasGraphics_save() {
this.ctx.save();
var old = this.current;
this.stateStack.push(old);
this.current = old.clone();
},
restore: function CanvasGraphics_restore() {
var prev = this.stateStack.pop();
if (prev) {
this.current = prev;
this.ctx.restore();
}
},
transform: function CanvasGraphics_transform(a, b, c, d, e, f) {
this.ctx.transform(a, b, c, d, e, f);
},
// Path
moveTo: function CanvasGraphics_moveTo(x, y) {
this.ctx.moveTo(x, y);
this.current.setCurrentPoint(x, y);
},
lineTo: function CanvasGraphics_lineTo(x, y) {
this.ctx.lineTo(x, y);
this.current.setCurrentPoint(x, y);
},
curveTo: function CanvasGraphics_curveTo(x1, y1, x2, y2, x3, y3) {
this.ctx.bezierCurveTo(x1, y1, x2, y2, x3, y3);
this.current.setCurrentPoint(x3, y3);
},
curveTo2: function CanvasGraphics_curveTo2(x2, y2, x3, y3) {
var current = this.current;
this.ctx.bezierCurveTo(current.x, current.y, x2, y2, x3, y3);
current.setCurrentPoint(x3, y3);
},
curveTo3: function CanvasGraphics_curveTo3(x1, y1, x3, y3) {
this.curveTo(x1, y1, x3, y3, x3, y3);
this.current.setCurrentPoint(x3, y3);
},
closePath: function CanvasGraphics_closePath() {
this.ctx.closePath();
},
rectangle: function CanvasGraphics_rectangle(x, y, width, height) {
if (width > 10 || height > 10) //MQZ. 9/12/2012. Avoid to draw check box
this.ctx.rect(x, y, width, height);
},
stroke: function CanvasGraphics_stroke(consumePath) {
consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
var ctx = this.ctx;
var strokeColor = this.current.strokeColor;
if (this.current.lineWidth === 0)
ctx.lineWidth = this.getSinglePixelWidth();
// For stroke we want to temporarily change the global alpha to the
// stroking alpha.
ctx.globalAlpha = this.current.strokeAlpha;
if (strokeColor && strokeColor.hasOwnProperty('type') &&
strokeColor.type === 'Pattern') {
// for patterns, we transform to pattern space, calculate
// the pattern, call stroke, and restore to user space
ctx.save();
ctx.strokeStyle = strokeColor.getPattern(ctx);
ctx.stroke();
ctx.restore();
} else {
ctx.stroke();
}
if (consumePath)
this.consumePath();
// Restore the global alpha to the fill alpha
ctx.globalAlpha = this.current.fillAlpha;
},
closeStroke: function CanvasGraphics_closeStroke() {
this.closePath();
this.stroke();
},
fill: function CanvasGraphics_fill(consumePath) {
consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
var ctx = this.ctx;
var fillColor = this.current.fillColor;
if (fillColor && fillColor.hasOwnProperty('type') &&
fillColor.type === 'Pattern') {
ctx.save();
ctx.fillStyle = fillColor.getPattern(ctx);
ctx.fill();
ctx.restore();
} else {
if (fillColor != 'rgb(220,255,250)') //MQZ.9/12/2012: prevent weird bk color in 1040
ctx.fill();
}
if (consumePath)
this.consumePath();
},
eoFill: function CanvasGraphics_eoFill() {
var savedFillRule = this.setEOFillRule();
this.fill();
this.restoreFillRule(savedFillRule);
},
fillStroke: function CanvasGraphics_fillStroke() {
this.fill(false);
this.stroke(false);
this.consumePath();
},
eoFillStroke: function CanvasGraphics_eoFillStroke() {
var savedFillRule = this.setEOFillRule();
this.fillStroke();
this.restoreFillRule(savedFillRule);
},
closeFillStroke: function CanvasGraphics_closeFillStroke() {
this.closePath();
this.fillStroke();
},
closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() {
var savedFillRule = this.setEOFillRule();
this.closePath();
this.fillStroke();
this.restoreFillRule(savedFillRule);
},
endPath: function CanvasGraphics_endPath() {
this.consumePath();
},
// Clipping
clip: function CanvasGraphics_clip() {
this.pendingClip = NORMAL_CLIP;
},
eoClip: function CanvasGraphics_eoClip() {
this.pendingClip = EO_CLIP;
},
// Text
beginText: function CanvasGraphics_beginText() {
this.current.textMatrix = IDENTITY_MATRIX;
this.current.x = this.current.lineX = 0;
this.current.y = this.current.lineY = 0;
},
endText: function CanvasGraphics_endText() {
},
setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) {
this.current.charSpacing = spacing;
},
setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) {
this.current.wordSpacing = spacing;
},
setHScale: function CanvasGraphics_setHScale(scale) {
this.current.textHScale = scale / 100;
},
setLeading: function CanvasGraphics_setLeading(leading) {
this.current.leading = -leading;
},
setFont: function CanvasGraphics_setFont(fontRefName, size) {
var fontObj = this.objs.get(fontRefName);
var current = this.current;
if (!fontObj)
error('Can\'t find font for ' + fontRefName);
// Slice-clone matrix so we can manipulate it without affecting original
if (fontObj.fontMatrix)
current.fontMatrix = fontObj.fontMatrix.slice(0);
else
current.fontMatrix = IDENTITY_MATRIX.slice(0);
// A valid matrix needs all main diagonal elements to be non-zero
// This also ensures we bypass FF bugzilla bug #719844.
if (current.fontMatrix[0] === 0 ||
current.fontMatrix[3] === 0) {
warn('Invalid font matrix for font ' + fontRefName);
}
// The spec for Tf (setFont) says that 'size' specifies the font 'scale',
// and in some docs this can be negative (inverted x-y axes).
// We implement this condition with fontMatrix.
if (size < 0) {
size = -size;
current.fontMatrix[0] *= -1;
current.fontMatrix[3] *= -1;
}
this.current.font = fontObj;
this.current.fontSize = size;
if (fontObj.coded)
return; // we don't need ctx.font for Type3 fonts
var name = fontObj.loadedName || 'sans-serif';
var bold = fontObj.black ? (fontObj.bold ? 'bolder' : 'bold') :
(fontObj.bold ? 'bold' : 'normal');
var italic = fontObj.italic ? 'italic' : 'normal';
var typeface = '"' + name + '", ' + fontObj.fallbackName;
// Some font backends cannot handle fonts below certain size.
// Keeping the font at minimal size and using the fontSizeScale to change
// the current transformation matrix before the fillText/strokeText.
// See https://bugzilla.mozilla.org/show_bug.cgi?id=726227
var browserFontSize = size >= MIN_FONT_SIZE ? size : MIN_FONT_SIZE;
this.current.fontSizeScale = browserFontSize != MIN_FONT_SIZE ? 1.0 :
size / MIN_FONT_SIZE;
var rule = italic + ' ' + bold + ' ' + browserFontSize + 'px ' + typeface;
this.ctx.font = rule;
//MQZ. 10/23/2012. enable font detection
this.ctx.setFont(fontObj);
},
setTextRenderingMode: function CanvasGraphics_setTextRenderingMode(mode) {
if (mode >= TextRenderingMode.FILL_ADD_TO_PATH)
TODO('unsupported text rendering mode: ' + mode);
this.current.textRenderingMode = mode;
},
setTextRise: function CanvasGraphics_setTextRise(rise) {
this.current.textRise = rise;
},
moveText: function CanvasGraphics_moveText(x, y) {
this.current.x = this.current.lineX += x;
this.current.y = this.current.lineY += y;
},
setLeadingMoveText: function CanvasGraphics_setLeadingMoveText(x, y) {
this.setLeading(-y);
this.moveText(x, y);
},
setTextMatrix: function CanvasGraphics_setTextMatrix(a, b, c, d, e, f) {
this.current.textMatrix = [a, b, c, d, e, f];
this.current.x = this.current.lineX = 0;
this.current.y = this.current.lineY = 0;
},
nextLine: function CanvasGraphics_nextLine() {
this.moveText(0, this.current.leading);
},
applyTextTransforms: function CanvasGraphics_applyTextTransforms() {
var ctx = this.ctx;
var current = this.current;
var textHScale = current.textHScale;
var fontMatrix = current.fontMatrix || IDENTITY_MATRIX;
ctx.transform.apply(ctx, current.textMatrix);
ctx.scale(1, -1);
ctx.translate(current.x, -current.y - current.textRise);
ctx.transform.apply(ctx, fontMatrix);
ctx.scale(textHScale, 1);
},
getTextGeometry: function CanvasGraphics_getTextGeometry() {
var geometry = {};
var ctx = this.ctx;
var font = this.current.font;
var ctxMatrix = ctx.mozCurrentTransform;
if (ctxMatrix) {
var bl = Util.applyTransform([0, 0], ctxMatrix);
var tr = Util.applyTransform([1, 1], ctxMatrix);
geometry.x = bl[0];
geometry.y = bl[1];
geometry.hScale = tr[0] - bl[0];
geometry.vScale = tr[1] - bl[1];
}
geometry.spaceWidth = font.spaceWidth;
return geometry;
},
showText: function CanvasGraphics_showText(str, skipTextSelection) {
var ctx = this.ctx;
var current = this.current;
var font = current.font;
var glyphs = font.charsToGlyphs(str);
var fontSize = current.fontSize;
var fontSizeScale = current.fontSizeScale;
var charSpacing = current.charSpacing;
var wordSpacing = current.wordSpacing;
var textHScale = current.textHScale;
var fontMatrix = current.fontMatrix || IDENTITY_MATRIX;
var textHScale2 = textHScale * fontMatrix[0];
var glyphsLength = glyphs.length;
var textLayer = this.textLayer;
var geom;
var textSelection = textLayer && !skipTextSelection ? true : false;
var textRenderingMode = current.textRenderingMode;
var canvasWidth = 0.0;
// Type3 fonts - each glyph is a "mini-PDF"
if (font.coded) {
ctx.save();
ctx.transform.apply(ctx, current.textMatrix);
ctx.translate(current.x, current.y);
ctx.scale(textHScale, 1);
if (textSelection) {
this.save();
ctx.scale(1, -1);
geom = this.getTextGeometry();
this.restore();
}
for (var i = 0; i < glyphsLength; ++i) {
var glyph = glyphs[i];
if (glyph === null) {
// word break
this.ctx.translate(wordSpacing, 0);
current.x += wordSpacing * textHScale;
continue;
}
this.save();
ctx.scale(fontSize, fontSize);
ctx.transform.apply(ctx, fontMatrix);
this.executeOperatorList(glyph.operatorList);
this.restore();
var transformed = Util.applyTransform([glyph.width, 0], fontMatrix);
var width = transformed[0] * fontSize +
Util.sign(current.fontMatrix[0]) * charSpacing;
ctx.translate(width, 0);
current.x += width * textHScale;
canvasWidth += width;
}
ctx.restore();
} else {
ctx.save();
this.applyTextTransforms();
var lineWidth = current.lineWidth;
var scale = Math.abs(current.textMatrix[0] * fontMatrix[0]);
if (scale == 0 || lineWidth == 0)
lineWidth = this.getSinglePixelWidth();
else
lineWidth /= scale;
if (textSelection)
geom = this.getTextGeometry();
if (fontSizeScale != 1.0) {
ctx.scale(fontSizeScale, fontSizeScale);
lineWidth /= fontSizeScale;
}
ctx.lineWidth = lineWidth;
//MQZ. 11/16/2012: added helper function
var useGlyph = (str[0] != glyphs[0].fontChar);
if (useGlyph)
str = "";
var alphaExp = /[^ -~]/; // /^[0-9a-zA-Z| !@#$%^&*():\/\\_,.]+$/; //
var isAlphanumeric = function (char) {
return (!alphaExp.test(char));// char.match(alphaExp); //
};
var x = 0;
for (var i = 0; i < glyphsLength; ++i) {
var glyph = glyphs[i];
if (glyph === null) {
// word break
x += Util.sign(current.fontMatrix[0]) * wordSpacing;
continue;
}
var character = glyph.fontChar;
var charWidth = glyph.width * fontSize * 0.001 +
Util.sign(current.fontMatrix[0]) * charSpacing;
if (!glyph.disabled) {
//MQZ. Disable character-based text rendering
// var scaledX = x / fontSizeScale;
// switch (textRenderingMode) {
// default: // other unsupported rendering modes
// case TextRenderingMode.FILL:
// case TextRenderingMode.FILL_ADD_TO_PATH:
// ctx.fillText(character, scaledX, 0);
// break;
// case TextRenderingMode.STROKE:
// case TextRenderingMode.STROKE_ADD_TO_PATH:
// ctx.strokeText(character, scaledX, 0);
// break;
// case TextRenderingMode.FILL_STROKE:
// case TextRenderingMode.FILL_STROKE_ADD_TO_PATH:
// ctx.fillText(character, scaledX, 0);
// ctx.strokeText(character, scaledX, 0);
// break;
// case TextRenderingMode.INVISIBLE:
// break;
// }
if (useGlyph && (textRenderingMode != TextRenderingMode.INVISIBLE)) {
if (isAlphanumeric(character))
str += character;
else if (glyph.unicode) {
str += glyph.unicode;
}
else {
str += " ";
// console.log("non-printable:\\u" + character.charCodeAt(0).toString(16) + "; unicode = " + glyph.unicode);
}
}
}
x += charWidth;
//MQZ. Nov.27.2012: comment out uesless unicode conversion
// var glyphUnicode = glyph.unicode === ' ' ? '\u00A0' : glyph.unicode;
// if (glyphUnicode in NormalizedUnicodes)
// glyphUnicode = NormalizedUnicodes[glyphUnicode];
canvasWidth += charWidth;
}
current.x += x * textHScale2;
//MQZ. 10/23/2012 Enable string rendering
switch (textRenderingMode) {
case TextRenderingMode.FILL:
case TextRenderingMode.FILL_ADD_TO_PATH:
ctx.fillText(str, 0, 0, canvasWidth, fontSize * scale);
break;
case TextRenderingMode.STROKE:
case TextRenderingMode.STROKE_ADD_TO_PATH:
ctx.strokeText(str, 0, 0, canvasWidth, fontSize * scale);
break;
case TextRenderingMode.FILL_STROKE:
case TextRenderingMode.FILL_STROKE_ADD_TO_PATH:
ctx.fillText(str, 0, 0, canvasWidth, fontSize * scale);
// ctx.strokeText(str, 0, 0, canvasWidth);
break;
case TextRenderingMode.INVISIBLE:
break;
default: // other unsupported rendering modes
}
//////////////////////////////////////////////////
ctx.restore();
}
if (textSelection) {
geom.canvasWidth = canvasWidth;
this.textLayer.appendText(font.fallbackName, fontSize, geom);
}
return canvasWidth;
},
showSpacedText: function CanvasGraphics_showSpacedText(arr) {
var ctx = this.ctx;
var current = this.current;
var font = current.font;
var fontSize = current.fontSize;
var textHScale = current.textHScale;
if (!font.coded)
textHScale *= (current.fontMatrix || IDENTITY_MATRIX)[0];
var arrLength = arr.length;
var textLayer = this.textLayer;
var geom;
var canvasWidth = 0.0;
var textSelection = textLayer ? true : false;
if (textSelection) {
ctx.save();
// Type3 fonts - each glyph is a "mini-PDF" (see also showText)
if (font.coded) {
ctx.transform.apply(ctx, current.textMatrix);
ctx.scale(1, -1);
ctx.translate(current.x, -1 * current.y);
ctx.scale(textHScale, 1);
} else
this.applyTextTransforms();
geom = this.getTextGeometry();
ctx.restore();
}
var sText = "";
var spacingLength = 0;
for (var i = 0; i < arrLength; ++i) {
var e = arr[i];
if (isNum(e)) {
//MQZ. Nov.28.2012 Disable character based rendering, make it a string
spacingLength = -e * 0.001 * fontSize * textHScale;
if (spacingLength > 0) {
var spTextWidth = 0;
if (spacingLength > 0.1) {
spTextWidth = this.showText(sText, true);
sText = "";
}
current.x += spacingLength;
if (textSelection)
canvasWidth += spacingLength + spTextWidth;
}
} else if (isString(e)) {
// var shownCanvasWidth = this.showText(e, true);
//
// if (textSelection)
// canvasWidth += shownCanvasWidth;
sText += e;
} else {
error('TJ array element ' + e + ' is not string or num');
}
}
//MQZ. Nov.28.2012 Disable character based rendering, make it a string
var shownCanvasWidth = this.showText(sText, true);
if (textSelection)
canvasWidth += shownCanvasWidth;
if (textSelection) {
geom.canvasWidth = canvasWidth;
this.textLayer.appendText(font.fallbackName, fontSize, geom);
}
},
nextLineShowText: function CanvasGraphics_nextLineShowText(text) {
this.nextLine();
this.showText(text);
},
nextLineSetSpacingShowText:
function CanvasGraphics_nextLineSetSpacingShowText(wordSpacing,
charSpacing,
text) {
this.setWordSpacing(wordSpacing);
this.setCharSpacing(charSpacing);
this.nextLineShowText(text);
},
// Type3 fonts
setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) {
// We can safely ignore this since the width should be the same
// as the width in the Widths array.
},
setCharWidthAndBounds: function CanvasGraphics_setCharWidthAndBounds(xWidth,
yWidth,
llx,
lly,
urx,
ury) {
// TODO According to the spec we're also suppose to ignore any operators
// that set color or include images while processing this type3 font.
this.rectangle(llx, lly, urx - llx, ury - lly);
this.clip();
this.endPath();
},
// Color
setStrokeColorSpace: function CanvasGraphics_setStrokeColorSpace(raw) {
this.current.strokeColorSpace = ColorSpace.fromIR(raw);
},
setFillColorSpace: function CanvasGraphics_setFillColorSpace(raw) {
this.current.fillColorSpace = ColorSpace.fromIR(raw);
},
setStrokeColor: function CanvasGraphics_setStrokeColor(/*...*/) {
var cs = this.current.strokeColorSpace;
var rgbColor = cs.getRgb(arguments);
var color = Util.makeCssRgb(rgbColor[0], rgbColor[1], rgbColor[2]);
this.ctx.strokeStyle = color;
this.current.strokeColor = color;
},
getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR, cs) {
if (IR[0] == 'TilingPattern') {
var args = IR[1];
var base = cs.base;
var color;
if (base) {
var baseComps = base.numComps;
color = [];
for (var i = 0; i < baseComps; ++i)
color.push(args[i]);
color = base.getRgb(color);
}
var pattern = new TilingPattern(IR, color, this.ctx, this.objs);
} else if (IR[0] == 'RadialAxial' || IR[0] == 'Dummy') {
var pattern = Pattern.shadingFromIR(IR);
} else {
error('Unkown IR type ' + IR[0]);
}
return pattern;
},
setStrokeColorN: function CanvasGraphics_setStrokeColorN(/*...*/) {
var cs = this.current.strokeColorSpace;
if (cs.name == 'Pattern') {
this.current.strokeColor = this.getColorN_Pattern(arguments, cs);
} else {
this.setStrokeColor.apply(this, arguments);
}
},
setFillColor: function CanvasGraphics_setFillColor(/*...*/) {
var cs = this.current.fillColorSpace;
var rgbColor = cs.getRgb(arguments);
var color = Util.makeCssRgb(rgbColor[0], rgbColor[1], rgbColor[2]);
this.ctx.fillStyle = color;
this.current.fillColor = color;
},
setFillColorN: function CanvasGraphics_setFillColorN(/*...*/) {
var cs = this.current.fillColorSpace;
if (cs.name == 'Pattern') {
this.current.fillColor = this.getColorN_Pattern(arguments, cs);