Fixing some smaller bugs & do some cleanup. viewer_worker.html UI is now
This commit is contained in:
Julian Viereck
parent
39ac389a7e
commit
52a117d32a
3
pdf.js
3
pdf.js
@ -2867,7 +2867,7 @@ var CanvasGraphics = (function() {
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this.ctx.scale(1, -1);
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if (this.ctx.$showText) {
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this.ctx.$showText(this.current.y, Fonts.charsToUnicode(text));
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this.ctx.$showText(this.current.y, text, Fonts.charsToUnicode(text));
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} else {
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text = Fonts.charsToUnicode(text);
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this.ctx.translate(this.current.x, -1 * this.current.y);
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@ -3423,7 +3423,6 @@ var CanvasGraphics = (function() {
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TODO("Images with "+ numComps + " components per pixel");
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}
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}
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console.log("paintImageXObject", w, h);
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tmpCanvas.putImageData(imgData, 0, 0);
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ctx.drawImage(tmpCanvas.getCanvas(), 0, -h);
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this.restore();
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@ -2,6 +2,16 @@
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<head>
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<title>Simple pdf.js page viewer worker</title>
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<script>
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var timer = null
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function tic() {
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timer = Date.now();
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}
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function toc(msg) {
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console.log(msg + ": " + (Date.now() - timer) + "ms");
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}
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var myWorker = new Worker('worker.js');
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var currentX = 0;
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@ -23,11 +33,9 @@ var special = {
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currentX = currentXStack.pop();
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},
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"$showText": function(y, text) {
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// console.log(text, currentX, y, this.measureText(text).width);
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"$showText": function(y, text, uniText) {
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this.translate(currentX, -1 * y);
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this.fillText(text, 0, 0);
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this.fillText(uniText, 0, 0);
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currentX += this.measureText(text).width;
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},
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@ -48,20 +56,10 @@ function renderProxyCanvas(stack) {
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// for (var i = 0; i < 1000; i++) {
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var opp = stack[i];
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if (opp[0] == "$") {
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// console.log("set property", opp[1], opp[2]);
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if (opp[1] == "font") {
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ctx[opp[1]] = opp[2];
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// ctx.font = "10px 'Verdana Bold Italic'";
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// console.log("font", opp[2]);
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} else {
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ctx[opp[1]] = opp[2];
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}
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} else if (opp[0] in special) {
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// console.log("sepcial", opp[0], opp[1])
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special[opp[0]].apply(ctx, opp[1]);
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} else {
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// console.log("execute", opp[0], opp[1]);
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ctx[opp[0]].apply(ctx, opp[1]);
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}
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}
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@ -71,6 +69,7 @@ const WAIT = 0;
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const CANVAS_PROXY_STACK = 1;
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const LOG = 2;
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const FONT = 3;
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const PDF_NUM_PAGE = 4;
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var onMessageState = WAIT;
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var fontStr = null;
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@ -85,6 +84,9 @@ myWorker.onmessage = function(event) {
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throw "expecting to get an string";
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}
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switch (data) {
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case "pdf_num_page":
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onMessageState = PDF_NUM_PAGE;
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return;
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case "log":
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onMessageState = LOG;
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return;
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@ -99,6 +101,13 @@ myWorker.onmessage = function(event) {
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}
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break;
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case PDF_NUM_PAGE:
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console.log(data);
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maxPages = parseInt(data);
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document.getElementById("numPages").innerHTML = "/" + data;
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onMessageState = WAIT;
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break;
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case FONT:
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data = JSON.parse(data);
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var base64 = window.btoa(data.str);
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@ -115,6 +124,7 @@ myWorker.onmessage = function(event) {
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ctx.font = "bold italic 20px " + data.fontName + ", Symbol, Arial";
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}, 10);
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intervals.push(interval);
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console.log("setup font", data.fontName);
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onMessageState = WAIT;
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break;
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@ -127,7 +137,7 @@ myWorker.onmessage = function(event) {
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case CANVAS_PROXY_STACK:
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var stack = JSON.parse(data);
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gStack = stack;
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console.log("canvas stack", stack.length)
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console.log("canvas stack size", stack.length)
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// Shedule a timeout. Hoping the fonts are loaded after 100ms.
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setTimeout(function() {
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@ -135,7 +145,9 @@ myWorker.onmessage = function(event) {
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intervals.forEach(function(inter) {
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clearInterval(inter);
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});
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tic();
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renderProxyCanvas(stack);
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toc("canvas rendering")
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}, 100);
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onMessageState = WAIT;
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break;
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@ -144,6 +156,19 @@ myWorker.onmessage = function(event) {
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//
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// myWorker.postMessage(array);
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var currentPage = 1;
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var maxPages = 1;
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function showPage(num) {
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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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console.log("worker: page=" + num)
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document.getElementById('pageNumber').value = num;
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currentPage = parseInt(num);
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myWorker.postMessage(num);
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}
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function open(url) {
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document.title = url;
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var req = new XMLHttpRequest();
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@ -155,22 +180,27 @@ function open(url) {
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var data = req.mozResponseArrayBuffer || req.mozResponse ||
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req.responseArrayBuffer || req.response;
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myWorker.postMessage(data);
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showPage("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 nextPage() {
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if (currentPage == maxPages) return;
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currentPage++;
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showPage(currentPage);
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}
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function prevPage() {
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if (currentPage == 0) return;
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currentPage--;
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showPage(currentPage);
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}
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window.onload = function() {
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var ctx = window.ctx = document.getElementById("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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// for (var name in ctx) {
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// if (!(ctx[name] instanceof Function)) {
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// console.log('"' + name + '": "' + ctx[name] + '",');
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// }
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// }
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window.canvas = document.getElementById("canvas");
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window.ctx = canvas.getContext("2d");
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open("compressed.tracemonkey-pldi-09.pdf");
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}
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</script>
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@ -184,7 +214,7 @@ window.onload = function() {
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-- Can we use JSONP to overcome the same-origin restrictions? -->
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<button onclick="prevPage();">Previous</button>
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<button onclick="nextPage();">Next</button>
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<input type="text" id="pageNumber" onchange="gotoPage(this.value);"
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<input type="text" id="pageNumber" onchange="showPage(this.value);"
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value="1" size="4"></input>
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<span id="numPages">--</span>
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<span id="info"></span>
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53
worker.js
53
worker.js
@ -26,7 +26,7 @@ function tic() {
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}
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function toc(msg) {
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log("Took ", (Date.now() - timer));
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log(msg + ": " + (Date.now() - timer) + "ms");
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timer = null;
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}
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@ -41,46 +41,41 @@ var canvas = new CanvasProxy(1224, 1584);
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log("test");
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var pageInterval;
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var pdfDocument = null;
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onmessage = function(event) {
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var data = event.data;
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var pdfDocument = new PDFDoc(new Stream(data));
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var numPages = pdfDocument.numPages;
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if (!pdfDocument) {
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pdfDocument = new PDFDoc(new Stream(data));
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postMessage("pdf_num_page");
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postMessage(pdfDocument.numPages)
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return;
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} else {
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tic();
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// Let's try to render the first page...
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var page = pdfDocument.getPage(2);
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var page = pdfDocument.getPage(parseInt(data));
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// page.compile will collect all fonts for us, once we have loaded them
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// we can trigger the actual page rendering with page.display
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var fonts = [];
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var gfx = new CanvasGraphics(canvas, ImageCanvasProxy);
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page.compile(gfx, fonts);
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toc("compiled page");
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// Inspect fonts and translate the missing one.
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var count = fonts.length;
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for (var i = 0; i < count; i++) {
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var font = fonts[i];
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if (Fonts[font.name]) {
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fontsReady = fontsReady && !Fonts[font.name].loading;
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continue;
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}
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// This "builds" the font and sents it over to the main thread.
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new Font(font.name, font.file, font.properties);
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}
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toc("compiled page");
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page.display(gfx);
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canvas.flush();
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}
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}
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// function open(url) {
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// var req = new XMLHttpRequest();
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// req.open("GET", url);
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// // req.responseType = "arraybuffer";
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// req.expected = 0;//(document.URL.indexOf("file:") == 0) ? 0 : 200;
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// req.onreadystatechange = function() {
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// postMessage("loaded");
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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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// numPages = pdfDocument.numPages;
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// // document.getElementById("numPages").innerHTML = numPages.toString();
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// // goToPage(pageNum);
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// }
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// };
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// req.send(null);
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// }
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//
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// open("compressed.tracemonkey-pldi-09.pdf")
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