yetangitu/pdf.js
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Reduce the memory usage of the operator list.

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This commit is contained in:
Brendan Dahl 2013-11-13 11:43:38 -08:00
parent a6e7f2226a
commit f4942b11f8
8 changed files with 288 additions and 155 deletions
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10
src/display/api.js
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@ -481,10 +481,10 @@ var PDFPageProxy = (function PDFPageProxyClosure() {
*/
_renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk) {
// Add the new chunk to the current operator list.
Util.concatenateToArray(this.operatorList.fnArray,
operatorListChunk.fnArray);
Util.concatenateToArray(this.operatorList.argsArray,
operatorListChunk.argsArray);
for (var i = 0, ii = operatorListChunk.length; i < ii; i++) {
this.operatorList.fnArray.push(operatorListChunk.fnArray[i]);
this.operatorList.argsArray.push(operatorListChunk.argsArray[i]);
}
this.operatorList.lastChunk = operatorListChunk.lastChunk;
// Notify all the rendering tasks there are more operators to be consumed.
@ -1094,7 +1094,7 @@ var InternalRenderTask = (function InternalRenderTaskClosure() {
this.operatorListIdx,
this._continue.bind(this),
this.stepper);
if (this.operatorListIdx === this.operatorList.fnArray.length) {
if (this.operatorListIdx === this.operatorList.argsArray.length) {
this.running = false;
if (this.operatorList.lastChunk) {
this.gfx.endDrawing();

16
src/display/canvas.js
View file

@ -17,7 +17,7 @@
/* globals ColorSpace, DeviceCmykCS, DeviceGrayCS, DeviceRgbCS, error,
FONT_IDENTITY_MATRIX, IDENTITY_MATRIX, ImageData, isArray, isNum,
Pattern, TilingPattern, TODO, Util, warn, assert, info,
TextRenderingMode */
TextRenderingMode, OPS */
'use strict';
@ -538,7 +538,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
var commonObjs = this.commonObjs;
var objs = this.objs;
var fnName;
var fnId;
var slowCommands = this.slowCommands;
while (true) {
@ -547,10 +547,10 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
return i;
}
fnName = fnArray[i];
fnId = fnArray[i];
if (fnName !== 'dependency') {
this[fnName].apply(this, argsArray[i]);
if (fnId !== OPS.dependency) {
this[fnId].apply(this, argsArray[i]);
} else {
var deps = argsArray[i];
for (var n = 0, nn = deps.length; n < nn; n++) {
@ -580,7 +580,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
// 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) {
if (continueCallback && slowCommands[fnId] && Date.now() > endTime) {
setTimeout(continueCallback, 0);
return i;
}
@ -1867,6 +1867,10 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
}
};
for (var op in OPS) {
CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op];
}
return CanvasGraphics;
})();