67 lines
1.7 KiB
JavaScript
67 lines
1.7 KiB
JavaScript
/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- /
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/* vim: set shiftwidth=4 tabstop=8 autoindent cindent expandtab: */
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var pdfDocument, canvas, pageDisplay, pageNum;
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function load() {
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canvas = document.getElementById("canvas");
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canvas.mozOpaque = true;
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open("uncompressed.tracemonkey-pldi-09.pdf");
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}
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function open(url) {
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document.title = url;
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req = new XMLHttpRequest();
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req.open("GET", url);
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req.mozResponseType = req.responseType = "arraybuffer";
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req.expected = (document.URL.indexOf("file:") == 0) ? 0 : 200;
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req.onreadystatechange = function() {
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if (req.readyState == 4 && req.status == req.expected) {
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var data = req.mozResponseArrayBuffer || req.mozResponse ||
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req.responseArrayBuffer || req.response;
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pdfDocument = new PDFDoc(new Stream(data));
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displayPage(1);
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}
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};
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req.send(null);
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}
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function displayPage(num) {
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document.getElementById("pageNumber").value = num;
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var t0 = Date.now();
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var page = pdfDocument.getPage(pageNum = num);
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var t1 = Date.now();
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var ctx = canvas.getContext("2d");
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ctx.save();
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ctx.fillStyle = "rgb(255, 255, 255)";
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ctx.fillRect(0, 0, canvas.width, canvas.height);
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ctx.restore();
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var gfx = new CanvasGraphics(ctx);
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page.display(gfx);
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var t2 = Date.now();
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var infoDisplay = document.getElementById("info");
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infoDisplay.innerHTML = "Time to render: "+ (t1 - t0) + "/" + (t2 - t1) + " ms";
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}
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function nextPage() {
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if (pageNum < pdfDocument.numPages)
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displayPage(++pageNum);
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}
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function prevPage() {
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if (pageNum > 1)
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displayPage(--pageNum);
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}
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function gotoPage(num) {
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if (0 <= num && num <= numPages)
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displayPage(pageNum = num);
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}
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