Sakurai/pdf.js
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uncompressed pdfs render a bit now

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This commit is contained in:
Andreas Gal 2011-05-11 19:05:30 -07:00
parent 6a4b0e8058
commit 284ef90e47
2 changed files with 41 additions and 241 deletions
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246
pdf.js
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@ -1788,6 +1788,18 @@ var Page = (function() {
error("invalid page contents object");
return this.contents = obj;
},
get resources() {
var obj = this.pageDict.get("Resources");
if (IsRef(obj))
obj = this.xref.fetch(obj);
return this.resources = (IsDict(obj) ? obj : null);
},
get mediaBox() {
var obj = this.pageDict.get("MediaBox");
return this.mediaBox = ((IsArray(obj) && obj.length == 4)
? obj
: null);
},
display: function() {
var stream = this.contents;
var parser = new Parser(new Lexer(stream), false);
@ -1853,7 +1865,7 @@ var Catalog = (function() {
pageCache = this.pageCache = [];
this.traverseKids(this.toplevelPagesDict);
}
return this.pageCache[n];
return this.pageCache[n-1];
}
};
@ -2014,7 +2026,8 @@ var Interpreter = (function() {
BT: gfx.beginText,
ET: gfx.endText,
Tf: function(fontRef, size) {
var font = env.res.Font[fontRef.name]
var font = env.res.get("Font").get(fontRef.name);
//alert(uneval(font));
gfx.setFont(font, size);
},
Td: gfx.moveText,
@ -2512,235 +2525,6 @@ var CanvasGraphics = (function() {
return constructor;
})();
//var PostscriptGraphics
//var SVGGraphics
var MockParser = (function() {
function constructor(objs) {
this.objs = objs.slice(0);
}
constructor.prototype = {
getObj: function() {
return this.objs.shift();
}
};
return constructor;
})();
function cmd(c) { return new Cmd(c); }
function name(n) { return new Name(n); }
function int(i) { return i; }
function string(s) { return s; }
function eof() { return EOF; }
function array(a) { return a; }
function real(r) { return r; }
var tests = [
{ name: "Hello world",
res: {
// XXX not structured correctly
Font: {
F1: { Type: "Font",
Subtype: "Type1",
Name: "F1",
BaseFont: "Helvetica",
Encoding: "MacRomanEncoding"
},
}
},
mediaBox: [ 0, 0, 612, 792 ],
objs: [
cmd("BT"),
name("F1"), int(24), cmd("Tf"),
int(100), int(100), cmd("Td"),
string("Hello World"), cmd("Tj"),
cmd("ET"),
eof()
]
},
{ name: "Simple graphics",
res: { },
mediaBox: [ 0, 0, 612, 792 ],
objs: [
int(150), int(250), cmd("m"),
int(150), int(350), cmd("l"),
cmd("S"),
int(4), cmd("w"),
array([int(4), int(6)]), int(0), cmd("d"),
int(150), int(250), cmd("m"),
int(400), int(250), cmd("l"),
cmd("S"),
array([]), int(0), cmd("d"),
int(1), cmd("w"),
real(1.0), real(0.0), real(0.0), cmd("RG"),
real(0.5), real(0.75), real(1.0), cmd("rg"),
int(200), int(300), int(50), int(75), cmd("re"),
cmd("B"),
real(0.5), real(0.1), real(0.2), cmd("RG"),
real(0.7), cmd("g"),
int(300), int(300), cmd("m"),
int(300), int(400), int(400), int(400), int(400), int(300), cmd("c"),
cmd("b"),
eof()
]
},
{ name: "Heart",
res: { },
mediaBox: [ 0, 0, 612, 792 ],
objs: [
cmd("q"),
real(0.9), real(0.0), real(0.0), cmd("rg"),
int(75), int(40), cmd("m"),
int(75), int(37), int(70), int(25), int(50), int(25), cmd("c"),
int(20), int(25), int(20), real(62.5), int(20), real(62.5), cmd("c"),
int(20), int(80), int(40), int(102), int(75), int(120), cmd("c"),
int(110), int(102), int(130), int(80), int(130), real(62.5), cmd("c"),
int(130), real(62.5), int(130), int(25), int(100), int(25), cmd("c"),
int(85), int(25), int(75), int(37), int(75), int(40), cmd("c"),
cmd("f"),
cmd("Q"),
eof()
]
},
{ name: "Rectangle",
res: { },
mediaBox: [ 0, 0, 612, 792 ],
objs: [
int(1), int(0), int(0), int(1), int(80), int(80), cmd("cm"),
int(0), int(72), cmd("m"),
int(72), int(0), cmd("l"),
int(0), int(-72), cmd("l"),
int(-72), int(0), cmd("l"),
int(4), cmd("w"),
cmd("h"), cmd("S"),
eof()
]
},
{ name: "TJ",
res: {
// XXX not structured correctly
Font: {
F1: { Type: "Font",
Subtype: "Type1",
Name: "F1",
BaseFont: "Georgia",
Encoding: "MacRomanEncoding"
},
}
},
mediaBox: [ 0, 0, 612, 792 ],
objs: [
cmd("BT"),
name("F1"), real(17.9328), cmd("Tf"),
real(80.5159), real(700.6706), cmd("Td"),
[ string("Trace-based Just-in-Time") ], cmd("TJ"),
int(0), int(-18), cmd("Td"),
[ string("T"), int(74), string("race-based"), int(-250), string("J"), int(15), string("ust-in-T"), int(18), string("ime") ], cmd("TJ"),
cmd("ET"),
eof()
]
},
{ name: "Line cap",
res: { },
mediaBox: [ 0, 0, 612, 792 ],
objs: [
int(5), cmd("w"),
int(0), cmd("J"), // butt cap
int(100), int(692), cmd("m"),
int(200), int(692), cmd("l"),
cmd("S"),
int(1), cmd("J"), // round cap
int(100), int(686), cmd("m"),
int(200), int(686), cmd("l"),
cmd("S"),
int(2), cmd("J"), // projecting square cap
int(100), int(680), cmd("m"),
int(200), int(680), cmd("l"),
cmd("S"),
eof()
],
},
{ name: "Line join",
res: { },
mediaBox: [ 0, 0, 612, 792 ],
objs: [
int(20), cmd("w"),
int(0), cmd("j"), // miter join
int(100), int(692), cmd("m"),
int(150), int(642), cmd("l"),
int(200), int(692), cmd("l"),
cmd("S"),
int(1), cmd("j"), // round join
int(250), int(692), cmd("m"),
int(300), int(642), cmd("l"),
int(350), int(692), cmd("l"),
cmd("S"),
int(2), cmd("j"), // bevel join
int(400), int(692), cmd("m"),
int(450), int(642), cmd("l"),
int(500), int(692), cmd("l"),
cmd("S"),
eof()
],
},
{ name: "NYI", // check that NYI commands are no-ops
res: { },
mediaBox: [ 0, 0, 612, 792 ],
objs: [
name("Perceptual"), cmd("ri"),
int(2), cmd("i"),
int(1), int(0), int(0), int(1), int(80), int(80), cmd("Tm"),
name("DeviceRGB"), cmd("CS"),
name("DeviceGray"), cmd("cs"),
int(1), int(0), int(0), cmd("SC"),
int(1), int(0), int(0), cmd("SCN"),
int(1), cmd("sc"),
int(1), cmd("scn"),
name("object"), cmd("Do"),
name("shading"), cmd("sh"),
eof()
],
},
{ name: "Broken heart",
res: { },
mediaBox: [ 0, 0, 612, 792 ],
objs: [
cmd("q"),
int(20), int(20), int(60), int(60), cmd("re"),
int(60), int(60), int(60), int(60), cmd("re"),
cmd("W"), cmd("n"),
real(0.9), real(0.0), real(0.0), cmd("rg"),
int(75), int(40), cmd("m"),
int(75), int(37), int(70), int(25), int(50), int(25), cmd("c"),
int(20), int(25), int(20), real(62.5), int(20), real(62.5), cmd("c"),
int(20), int(80), int(40), int(102), int(75), int(120), cmd("c"),
int(110), int(102), int(130), int(80), int(130), real(62.5), cmd("c"),
int(130), real(62.5), int(130), int(25), int(100), int(25), cmd("c"),
int(85), int(25), int(75), int(37), int(75), int(40), cmd("c"),
cmd("f"),
cmd("Q"),
eof()
]
},
];
function runEchoTests() {
tests.forEach(function(test) {
putstr("Running echo test '"+ test.name +"'... ");

36
test.html
View File

@ -20,18 +20,30 @@ body {
}
</style>
<script type="text/javascript">
<script type="text/javascript">
var canvas, numPages, pageDisplay, pageNum;
function load() {
canvas = document.getElementById("canvas");
pageDisplay = document.getElementById("pageNumber");
numPages = tests.length;
displayPage(pageNum = 0);
req = new XMLHttpRequest();
req.open("GET", "uncompressed.tracemonkey-pldi-09.pdf");
req.onreadystatechange = xhrstate;
req.send(null);
}
function displayPage(number) {
var page = tests[number];
pageDisplay.value = number;
function xhrstate() {
if (req.readyState == 4 && req.status == 200) {
var data = req.mozResponseArrayBuffer;
pdf = new PDFDoc(new Stream(data));
numPages = pdf.numPages;
displayPage(1);
}
}
function displayPage(num) {
var page = pdf.getPage(pageNum = num);
pageDisplay.value = num;
var ctx = canvas.getContext("2d");
ctx.save();
@ -40,17 +52,21 @@ function displayPage(number) {
ctx.restore();
var gfx = new CanvasGraphics(ctx);
var interp = new Interpreter(null, page.res, null, gfx);
interp.interpretHelper(page.mediaBox, new MockParser(page.objs));
var interp = new Interpreter(null, page.resources, null, gfx);
var stream = page.contents;
var parser = new Parser(new Lexer(stream), false);
interp.interpretHelper(page.mediaBox, parser);
}
function nextPage() {
pageNum = (pageNum + 1) % numPages;
if (pageNum < numPages)
++pageNum;
displayPage(pageNum);
}
function prevPage() {
pageNum = (pageNum - 1 + numPages) % numPages;
if (pageNum > 0)
--pageNum;
displayPage(pageNum);
}