Sakurai/pdf.js
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cache results of compilation

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This commit is contained in:
Andreas Gal 2011-06-14 23:16:53 -07:00
parent 7afaca2d35
commit 5acb9a16de
1 changed files with 16 additions and 15 deletions
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pdf.js
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@ -1395,7 +1395,9 @@ var Page = (function() {
gfx.beginDrawing({ x: mediaBox[0], y: mediaBox[1], gfx.beginDrawing({ x: mediaBox[0], y: mediaBox[1],
width: mediaBox[2] - mediaBox[0], width: mediaBox[2] - mediaBox[0],
height: mediaBox[3] - mediaBox[1] }); height: mediaBox[3] - mediaBox[1] });
gfx.execute(contents, xref, resources); if (!this.code)
this.code = gfx.compile(contents, xref, resources);
gfx.execute(this.code, xref, resources);
gfx.endDrawing(); gfx.endDrawing();
} }
}; };
@ -1682,16 +1684,13 @@ var CanvasGraphics = (function() {
this.ctx.translate(0, -mediaBox.height); this.ctx.translate(0, -mediaBox.height);
}, },
execute: function(stream, xref, resources) { execute: function(code, xref, resources) {
if (!stream.execute)
stream.execute = this.compile(stream, xref, resources);
var savedXref = this.xref, savedRes = this.res, savedXobjs = this.xobjs; var savedXref = this.xref, savedRes = this.res, savedXobjs = this.xobjs;
this.xref = xref; this.xref = xref;
this.res = resources || new Dict(); this.res = resources || new Dict();
this.xobjs = xref.fetchIfRef(this.res.get("XObject")) || new Dict(); this.xobjs = xref.fetchIfRef(this.res.get("XObject")) || new Dict();
stream.execute(this); code(this);
this.xobjs = savedXobjs; this.xobjs = savedXobjs;
this.res = savedRes; this.res = savedRes;
@ -1699,6 +1698,7 @@ var CanvasGraphics = (function() {
}, },
compile: function(stream, xref, resources) { compile: function(stream, xref, resources) {
console.log("compiling");
var xobjs = xref.fetchIfRef(resources.get("XObject")) || new Dict(); var xobjs = xref.fetchIfRef(resources.get("XObject")) || new Dict();
var parser = new Parser(new Lexer(stream), false); var parser = new Parser(new Lexer(stream), false);
@ -1725,7 +1725,7 @@ var CanvasGraphics = (function() {
assertWellFormed(fn, "Unknown command '" + cmd + "'"); assertWellFormed(fn, "Unknown command '" + cmd + "'");
// TODO figure out how to type-check vararg functions // TODO figure out how to type-check vararg functions
if (cmd == "Do") { // eagerly compile XForm objects if (cmd == "Do" && !args[0].code) { // eagerly compile XForm objects
var name = args[0].name; var name = args[0].name;
var xobj = xobjs.get(name); var xobj = xobjs.get(name);
if (xobj) { if (xobj) {
@ -1736,7 +1736,7 @@ var CanvasGraphics = (function() {
assertWellFormed(IsName(type), "XObject should have a Name subtype"); assertWellFormed(IsName(type), "XObject should have a Name subtype");
if ("Form" == type.name) { if ("Form" == type.name) {
this.compile(xobj, xref, xobj.dict.get("Resources")); args[0].code = this.compile(xobj, xref, xobj.dict.get("Resources"));
} }
} }
} }
@ -2050,9 +2050,9 @@ var CanvasGraphics = (function() {
var type = xobj.dict.get("Subtype"); var type = xobj.dict.get("Subtype");
assertWellFormed(IsName(type), "XObject should have a Name subtype"); assertWellFormed(IsName(type), "XObject should have a Name subtype");
if ("Image" == type.name) { if ("Image" == type.name) {
this.paintImageXObject(xobj, false); this.paintImageXObject(obj, xobj, false);
} else if ("Form" == type.name) { } else if ("Form" == type.name) {
this.paintFormXObject(xobj); this.paintFormXObject(obj, xobj);
} else if ("PS" == type.name) { } else if ("PS" == type.name) {
warn("(deprecated) PostScript XObjects are not supported"); warn("(deprecated) PostScript XObjects are not supported");
} else { } else {
@ -2060,25 +2060,26 @@ var CanvasGraphics = (function() {
} }
}, },
paintFormXObject: function(form) { paintFormXObject: function(ref, stream) {
this.save(); this.save();
var matrix = form.dict.get("Matrix"); var matrix = stream.dict.get("Matrix");
if (matrix && IsArray(matrix) && 6 == matrix.length) if (matrix && IsArray(matrix) && 6 == matrix.length)
this.transform.apply(this, matrix); this.transform.apply(this, matrix);
var bbox = form.dict.get("BBox"); var bbox = stream.dict.get("BBox");
if (bbox && IsArray(bbox) && 4 == bbox.length) { if (bbox && IsArray(bbox) && 4 == bbox.length) {
this.rectangle.apply(this, bbox); this.rectangle.apply(this, bbox);
this.clip(); this.clip();
this.endPath(); this.endPath();
} }
this.execute(form, this.xref, form.dict.get("Resources"));
this.execute(ref.code, this.xref, stream.dict.get("Resources"));
this.restore(); this.restore();
}, },
paintImageXObject: function(image, inline) { paintImageXObject: function(ref, image, inline) {
this.save(); this.save();
if (image.getParams) { if (image.getParams) {
// JPX/JPEG2000 streams directly contain bits per component // JPX/JPEG2000 streams directly contain bits per component