1274 lines
42 KiB
JavaScript
1274 lines
42 KiB
JavaScript
/* -*- 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;
|
|
|
|
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) {
|
|
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 {
|
|
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;
|
|
},
|
|
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);
|
|
},
|
|
createTextGeometry: function CanvasGraphics_createTextGeometry() {
|
|
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;
|
|
geometry.fontName = font.loadedName;
|
|
geometry.fontFamily = font.fallbackName;
|
|
geometry.fontSize = this.current.fontSize;
|
|
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.createTextGeometry();
|
|
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.createTextGeometry();
|
|
|
|
if (fontSizeScale != 1.0) {
|
|
ctx.scale(fontSizeScale, fontSizeScale);
|
|
lineWidth /= fontSizeScale;
|
|
}
|
|
|
|
ctx.lineWidth = lineWidth;
|
|
|
|
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) {
|
|
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;
|
|
}
|
|
}
|
|
|
|
x += charWidth;
|
|
|
|
var glyphUnicode = glyph.unicode === ' ' ? '\u00A0' : glyph.unicode;
|
|
if (glyphUnicode in NormalizedUnicodes)
|
|
glyphUnicode = NormalizedUnicodes[glyphUnicode];
|
|
|
|
canvasWidth += charWidth;
|
|
}
|
|
current.x += x * textHScale2;
|
|
ctx.restore();
|
|
}
|
|
|
|
if (textSelection) {
|
|
geom.canvasWidth = canvasWidth;
|
|
this.textLayer.appendText(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.createTextGeometry();
|
|
ctx.restore();
|
|
}
|
|
|
|
for (var i = 0; i < arrLength; ++i) {
|
|
var e = arr[i];
|
|
if (isNum(e)) {
|
|
var spacingLength = -e * 0.001 * fontSize * textHScale;
|
|
current.x += spacingLength;
|
|
|
|
if (textSelection)
|
|
canvasWidth += spacingLength;
|
|
} else if (isString(e)) {
|
|
var shownCanvasWidth = this.showText(e, true);
|
|
|
|
if (textSelection)
|
|
canvasWidth += shownCanvasWidth;
|
|
} else {
|
|
error('TJ array element ' + e + ' is not string or num');
|
|
}
|
|
}
|
|
|
|
if (textSelection) {
|
|
geom.canvasWidth = canvasWidth;
|
|
this.textLayer.appendText(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);
|
|
} else {
|
|
this.setFillColor.apply(this, arguments);
|
|
}
|
|
},
|
|
setStrokeGray: function CanvasGraphics_setStrokeGray(gray) {
|
|
if (!(this.current.strokeColorSpace instanceof DeviceGrayCS))
|
|
this.current.strokeColorSpace = new DeviceGrayCS();
|
|
|
|
var color = Util.makeCssRgb(gray, gray, gray);
|
|
this.ctx.strokeStyle = color;
|
|
this.current.strokeColor = color;
|
|
},
|
|
setFillGray: function CanvasGraphics_setFillGray(gray) {
|
|
if (!(this.current.fillColorSpace instanceof DeviceGrayCS))
|
|
this.current.fillColorSpace = new DeviceGrayCS();
|
|
|
|
var color = Util.makeCssRgb(gray, gray, gray);
|
|
this.ctx.fillStyle = color;
|
|
this.current.fillColor = color;
|
|
},
|
|
setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) {
|
|
if (!(this.current.strokeColorSpace instanceof DeviceRgbCS))
|
|
this.current.strokeColorSpace = new DeviceRgbCS();
|
|
|
|
var color = Util.makeCssRgb(r, g, b);
|
|
this.ctx.strokeStyle = color;
|
|
this.current.strokeColor = color;
|
|
},
|
|
setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) {
|
|
if (!(this.current.fillColorSpace instanceof DeviceRgbCS))
|
|
this.current.fillColorSpace = new DeviceRgbCS();
|
|
|
|
var color = Util.makeCssRgb(r, g, b);
|
|
this.ctx.fillStyle = color;
|
|
this.current.fillColor = color;
|
|
},
|
|
setStrokeCMYKColor: function CanvasGraphics_setStrokeCMYKColor(c, m, y, k) {
|
|
if (!(this.current.strokeColorSpace instanceof DeviceCmykCS))
|
|
this.current.strokeColorSpace = new DeviceCmykCS();
|
|
|
|
var color = Util.makeCssCmyk(c, m, y, k);
|
|
this.ctx.strokeStyle = color;
|
|
this.current.strokeColor = color;
|
|
},
|
|
setFillCMYKColor: function CanvasGraphics_setFillCMYKColor(c, m, y, k) {
|
|
if (!(this.current.fillColorSpace instanceof DeviceCmykCS))
|
|
this.current.fillColorSpace = new DeviceCmykCS();
|
|
|
|
var color = Util.makeCssCmyk(c, m, y, k);
|
|
this.ctx.fillStyle = color;
|
|
this.current.fillColor = color;
|
|
},
|
|
|
|
shadingFill: function CanvasGraphics_shadingFill(patternIR) {
|
|
var ctx = this.ctx;
|
|
|
|
this.save();
|
|
var pattern = Pattern.shadingFromIR(patternIR);
|
|
ctx.fillStyle = pattern.getPattern(ctx);
|
|
|
|
var inv = ctx.mozCurrentTransformInverse;
|
|
if (inv) {
|
|
var canvas = ctx.canvas;
|
|
var width = canvas.width;
|
|
var height = canvas.height;
|
|
|
|
var bl = Util.applyTransform([0, 0], inv);
|
|
var br = Util.applyTransform([0, height], inv);
|
|
var ul = Util.applyTransform([width, 0], inv);
|
|
var ur = Util.applyTransform([width, height], inv);
|
|
|
|
var x0 = Math.min(bl[0], br[0], ul[0], ur[0]);
|
|
var y0 = Math.min(bl[1], br[1], ul[1], ur[1]);
|
|
var x1 = Math.max(bl[0], br[0], ul[0], ur[0]);
|
|
var y1 = Math.max(bl[1], br[1], ul[1], ur[1]);
|
|
|
|
this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0);
|
|
} else {
|
|
// HACK to draw the gradient onto an infinite rectangle.
|
|
// PDF gradients are drawn across the entire image while
|
|
// Canvas only allows gradients to be drawn in a rectangle
|
|
// The following bug should allow us to remove this.
|
|
// https://bugzilla.mozilla.org/show_bug.cgi?id=664884
|
|
|
|
this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10);
|
|
}
|
|
|
|
this.restore();
|
|
},
|
|
|
|
// Images
|
|
beginInlineImage: function CanvasGraphics_beginInlineImage() {
|
|
error('Should not call beginInlineImage');
|
|
},
|
|
beginImageData: function CanvasGraphics_beginImageData() {
|
|
error('Should not call beginImageData');
|
|
},
|
|
|
|
paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(matrix,
|
|
bbox) {
|
|
this.save();
|
|
|
|
if (matrix && isArray(matrix) && 6 == matrix.length)
|
|
this.transform.apply(this, matrix);
|
|
|
|
if (bbox && isArray(bbox) && 4 == bbox.length) {
|
|
var width = bbox[2] - bbox[0];
|
|
var height = bbox[3] - bbox[1];
|
|
this.rectangle(bbox[0], bbox[1], width, height);
|
|
this.clip();
|
|
this.endPath();
|
|
}
|
|
},
|
|
|
|
paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() {
|
|
this.restore();
|
|
},
|
|
|
|
paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) {
|
|
var domImage = this.objs.get(objId);
|
|
if (!domImage) {
|
|
error('Dependent image isn\'t ready yet');
|
|
}
|
|
|
|
this.save();
|
|
|
|
var ctx = this.ctx;
|
|
// scale the image to the unit square
|
|
ctx.scale(1 / w, -1 / h);
|
|
|
|
ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height,
|
|
0, -h, w, h);
|
|
|
|
this.restore();
|
|
},
|
|
|
|
paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(
|
|
imgArray, inverseDecode, width, height) {
|
|
function applyStencilMask(buffer, inverseDecode) {
|
|
var imgArrayPos = 0;
|
|
var i, j, mask, buf;
|
|
// removing making non-masked pixels transparent
|
|
var bufferPos = 3; // alpha component offset
|
|
for (i = 0; i < height; i++) {
|
|
mask = 0;
|
|
for (j = 0; j < width; j++) {
|
|
if (!mask) {
|
|
buf = imgArray[imgArrayPos++];
|
|
mask = 128;
|
|
}
|
|
if (!(buf & mask) == inverseDecode) {
|
|
buffer[bufferPos] = 0;
|
|
}
|
|
bufferPos += 4;
|
|
mask >>= 1;
|
|
}
|
|
}
|
|
}
|
|
function rescaleImage(pixels, widthScale, heightScale) {
|
|
var scaledWidth = Math.ceil(width / widthScale);
|
|
var scaledHeight = Math.ceil(height / heightScale);
|
|
|
|
var itemsSum = new Uint32Array(scaledWidth * scaledHeight * 4);
|
|
var itemsCount = new Uint32Array(scaledWidth * scaledHeight);
|
|
for (var i = 0, position = 0; i < height; i++) {
|
|
var lineOffset = (0 | (i / heightScale)) * scaledWidth;
|
|
for (var j = 0; j < width; j++) {
|
|
var countOffset = lineOffset + (0 | (j / widthScale));
|
|
var sumOffset = countOffset << 2;
|
|
itemsSum[sumOffset] += pixels[position];
|
|
itemsSum[sumOffset + 1] += pixels[position + 1];
|
|
itemsSum[sumOffset + 2] += pixels[position + 2];
|
|
itemsSum[sumOffset + 3] += pixels[position + 3];
|
|
itemsCount[countOffset]++;
|
|
position += 4;
|
|
}
|
|
}
|
|
var tmpCanvas = createScratchCanvas(scaledWidth, scaledHeight);
|
|
var tmpCtx = tmpCanvas.getContext('2d');
|
|
var imgData = tmpCtx.getImageData(0, 0, scaledWidth, scaledHeight);
|
|
pixels = imgData.data;
|
|
for (var i = 0, j = 0, ii = scaledWidth * scaledHeight; i < ii; i++) {
|
|
var count = itemsCount[i];
|
|
pixels[j] = itemsSum[j] / count;
|
|
pixels[j + 1] = itemsSum[j + 1] / count;
|
|
pixels[j + 2] = itemsSum[j + 2] / count;
|
|
pixels[j + 3] = itemsSum[j + 3] / count;
|
|
j += 4;
|
|
}
|
|
tmpCtx.putImageData(imgData, 0, 0);
|
|
return tmpCanvas;
|
|
}
|
|
|
|
this.save();
|
|
|
|
var ctx = this.ctx;
|
|
var w = width, h = height;
|
|
// scale the image to the unit square
|
|
ctx.scale(1 / w, -1 / h);
|
|
|
|
var tmpCanvas = createScratchCanvas(w, h);
|
|
var tmpCtx = tmpCanvas.getContext('2d');
|
|
|
|
var fillColor = this.current.fillColor;
|
|
tmpCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') &&
|
|
fillColor.type === 'Pattern') ?
|
|
fillColor.getPattern(tmpCtx) : fillColor;
|
|
tmpCtx.fillRect(0, 0, w, h);
|
|
|
|
var imgData = tmpCtx.getImageData(0, 0, w, h);
|
|
var pixels = imgData.data;
|
|
|
|
applyStencilMask(pixels, inverseDecode);
|
|
|
|
var currentTransform = ctx.mozCurrentTransformInverse;
|
|
var widthScale = Math.max(Math.abs(currentTransform[0]), 1);
|
|
var heightScale = Math.max(Math.abs(currentTransform[3]), 1);
|
|
if (widthScale >= 2 || heightScale >= 2) {
|
|
// canvas does not resize well large images to small -- using simple
|
|
// algorithm to perform pre-scaling
|
|
tmpCanvas = rescaleImage(imgData.data, widthScale, heightScale);
|
|
ctx.scale(widthScale, heightScale);
|
|
ctx.drawImage(tmpCanvas, 0, -h / heightScale);
|
|
} else {
|
|
tmpCtx.putImageData(imgData, 0, 0);
|
|
ctx.drawImage(tmpCanvas, 0, -h);
|
|
}
|
|
this.restore();
|
|
},
|
|
|
|
paintImageXObject: function CanvasGraphics_paintImageXObject(objId) {
|
|
var imgData = this.objs.get(objId);
|
|
if (!imgData)
|
|
error('Dependent image isn\'t ready yet');
|
|
|
|
this.save();
|
|
var ctx = this.ctx;
|
|
var w = imgData.width;
|
|
var h = imgData.height;
|
|
// scale the image to the unit square
|
|
ctx.scale(1 / w, -1 / h);
|
|
|
|
var tmpCanvas = createScratchCanvas(w, h);
|
|
var tmpCtx = tmpCanvas.getContext('2d');
|
|
this.putBinaryImageData(tmpCtx, imgData, w, h);
|
|
|
|
ctx.drawImage(tmpCanvas, 0, -h);
|
|
this.restore();
|
|
},
|
|
|
|
putBinaryImageData: function CanvasGraphics_putBinaryImageData(ctx, imgData,
|
|
w, h) {
|
|
var tmpImgData = 'createImageData' in ctx ? ctx.createImageData(w, h) :
|
|
ctx.getImageData(0, 0, w, h);
|
|
|
|
var tmpImgDataPixels = tmpImgData.data;
|
|
var data = imgData.data;
|
|
if ('set' in tmpImgDataPixels)
|
|
tmpImgDataPixels.set(data);
|
|
else {
|
|
// Copy over the imageData pixel by pixel.
|
|
for (var i = 0, ii = tmpImgDataPixels.length; i < ii; i++)
|
|
tmpImgDataPixels[i] = data[i];
|
|
}
|
|
|
|
ctx.putImageData(tmpImgData, 0, 0);
|
|
},
|
|
|
|
// Marked content
|
|
|
|
markPoint: function CanvasGraphics_markPoint(tag) {
|
|
// TODO Marked content.
|
|
},
|
|
markPointProps: function CanvasGraphics_markPointProps(tag, properties) {
|
|
// TODO Marked content.
|
|
},
|
|
beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) {
|
|
// TODO Marked content.
|
|
},
|
|
beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps(
|
|
tag, properties) {
|
|
// TODO Marked content.
|
|
},
|
|
endMarkedContent: function CanvasGraphics_endMarkedContent() {
|
|
// TODO Marked content.
|
|
},
|
|
|
|
// Compatibility
|
|
|
|
beginCompat: function CanvasGraphics_beginCompat() {
|
|
TODO('ignore undefined operators (should we do that anyway?)');
|
|
},
|
|
endCompat: function CanvasGraphics_endCompat() {
|
|
TODO('stop ignoring undefined operators');
|
|
},
|
|
|
|
// Helper functions
|
|
|
|
consumePath: function CanvasGraphics_consumePath() {
|
|
if (this.pendingClip) {
|
|
var savedFillRule = null;
|
|
if (this.pendingClip == EO_CLIP)
|
|
savedFillRule = this.setEOFillRule();
|
|
|
|
this.ctx.clip();
|
|
|
|
this.pendingClip = null;
|
|
if (savedFillRule !== null)
|
|
this.restoreFillRule(savedFillRule);
|
|
}
|
|
this.ctx.beginPath();
|
|
},
|
|
// We generally keep the canvas context set for
|
|
// nonzero-winding, and just set evenodd for the operations
|
|
// that need them.
|
|
setEOFillRule: function CanvasGraphics_setEOFillRule() {
|
|
var savedFillRule = this.ctx.mozFillRule;
|
|
this.ctx.mozFillRule = 'evenodd';
|
|
return savedFillRule;
|
|
},
|
|
restoreFillRule: function CanvasGraphics_restoreFillRule(rule) {
|
|
this.ctx.mozFillRule = rule;
|
|
},
|
|
getSinglePixelWidth: function CanvasGraphics_getSinglePixelWidth(scale) {
|
|
var inverse = this.ctx.mozCurrentTransformInverse;
|
|
return Math.abs(inverse[0] + inverse[2]);
|
|
}
|
|
};
|
|
|
|
return CanvasGraphics;
|
|
})();
|
|
|