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Merge from gal's master branch (got a regression on the mapping between char->glyph)

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Vivien Nicolas 2011-06-16 03:05:55 +02:00
commit a57b53b3b3
3 changed files with 530 additions and 216 deletions
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98
test.js
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@ -56,87 +56,35 @@ function displayPage(num) {
var page = pdfDocument.getPage(pageNum = num);
function display() {
var t1 = Date.now();
var ctx = canvas.getContext("2d");
ctx.save();
ctx.fillStyle = "rgb(255, 255, 255)";
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.restore();
var t1 = Date.now();
var gfx = new CanvasGraphics(ctx);
page.display(gfx);
var ctx = canvas.getContext("2d");
ctx.save();
ctx.fillStyle = "rgb(255, 255, 255)";
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.restore();
var t2 = Date.now();
var infoDisplay = document.getElementById("info");
infoDisplay.innerHTML = "Time to render: "+ (t1 - t0) + "/" + (t2 - t1) + " ms";
}
var gfx = new CanvasGraphics(ctx);
// Loading a font via data uri is asynchronous, so wait for all font
// of the page to be fully loaded before loading the page
var fontsReady = true;
var fonts = page.fonts;
var xref = page.xref;
fonts.forEach(function(fontKey, fontDict) {
var descriptor = xref.fetch(fontDict.get("FontDescriptor"));
var fontName = descriptor.get("FontName").name;
fontName = fontName.replace("+", "_");
// page.compile will collect all fonts for us, once we have loaded them
// we can trigger the actual page rendering with page.display
var fonts = [];
page.compile(gfx, fonts);
var t2 = Date.now();
// Check if the font has been loaded or is still loading
var font = Fonts[fontName];
if (!font) {
var fontFile = descriptor.get2("FontFile", "FontFile2");
fontFile = xref.fetchIfRef(fontFile);
// Generate the custom cmap of the font if needed
var encodingMap = {};
if (fontDict.has("Encoding")) {
var encoding = xref.fetchIfRef(fontDict.get("Encoding"));
if (IsDict(encoding)) {
// Build an map between codes and glyphs
var differences = encoding.get("Differences");
var index = 0;
for (var j = 0; j < differences.length; j++) {
var data = differences[j];
IsNum(data) ? index = data : encodingMap[index++] = data;
}
// Get the font charset
var charset = descriptor.get("CharSet").split("/");
} else if (IsName(encoding)) {
var encoding = Encodings[encoding];
var widths = xref.fetchIfRef(fontDict.get("Widths"));
var firstchar = xref.fetchIfRef(fontDict.get("FirstChar"));
var charset = [];
for (var j = 0; j < widths.length; j++) {
var index = widths[j];
if (index)
charset.push(encoding[j + firstchar]);
}
}
}
var fontBBox = descriptor.get("FontBBox");
var subtype = fontDict.get("Subtype").name;
new Font(fontName, fontFile, encodingMap, charset, fontBBox, subtype);
return fontsReady = false;
} else if (font.loading) {
return fontsReady = false;
var interval = setInterval(function() {
for (var i = 0; i < fonts.length; i++) {
if (fonts[i].loading)
return;
}
});
// If everything is ready do not delayed the page loading any more
if (fontsReady)
display();
else {
// FIXME Relying on an event seems much more cleaner here instead
// of a setTimeout...
pageTimeout = window.setTimeout(displayPage, 150, num);
}
page.display(gfx);
var t3 = Date.now();
var infoDisplay = document.getElementById("info");
infoDisplay.innerHTML = "Time to load/compile/render: "+ (t1 - t0) + "/" + (t2 - t1) + "/" + (t3 - t2) + " ms";
clearInterval(interval);
}, 10);
}
function nextPage() {