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Merge pull request #8540 from Rob--W/svg-oom

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Reduce memory requirements of pdf2svg.js example to avoid OOM
This commit is contained in:
Yury Delendik 2017-06-20 17:24:48 -05:00 committed by GitHub
commit 9bed695ebd
2 changed files with 23 additions and 15 deletions
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29
examples/node/domstubs.js
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@ -95,24 +95,27 @@ DOMElement.prototype = {
}, },
toString: function DOMElement_toString() { toString: function DOMElement_toString() {
var attrList = []; var buf = [];
for (i in this.attributes) { buf.push('<' + this.nodeName);
attrList.push(i + '="' + xmlEncode(this.attributes[i]) + '"'); if (this.nodeName === 'svg:svg') {
buf.push(' xmlns:xlink="http://www.w3.org/1999/xlink"' +
' xmlns:svg="http://www.w3.org/2000/svg"');
}
for (var i in this.attributes) {
buf.push(' ' + i + '="' + xmlEncode(this.attributes[i]) + '"');
} }
buf.push('>');
if (this.nodeName === 'svg:tspan' || this.nodeName === 'svg:style') { if (this.nodeName === 'svg:tspan' || this.nodeName === 'svg:style') {
var encText = xmlEncode(this.textContent); buf.push(xmlEncode(this.textContent));
return '<' + this.nodeName + ' ' + attrList.join(' ') + '>' +
encText + '</' + this.nodeName + '>';
} else if (this.nodeName === 'svg:svg') {
var ns = 'xmlns:xlink="http://www.w3.org/1999/xlink" ' +
'xmlns:svg="http://www.w3.org/2000/svg"'
return '<' + this.nodeName + ' ' + ns + ' ' + attrList.join(' ') + '>' +
this.childNodes.join('') + '</' + this.nodeName + '>';
} else { } else {
return '<' + this.nodeName + ' ' + attrList.join(' ') + '>' + this.childNodes.forEach(function(childNode) {
this.childNodes.join('') + '</' + this.nodeName + '>'; buf.push(childNode.toString());
});
} }
buf.push('</' + this.nodeName + '>');
return buf.join('');
}, },
cloneNode: function DOMElement_cloneNode() { cloneNode: function DOMElement_cloneNode() {

9
examples/node/pdf2svg.js
View File

@ -18,7 +18,7 @@ var pdfPath = process.argv[2] || '../../web/compressed.tracemonkey-pldi-09.pdf';
var data = new Uint8Array(fs.readFileSync(pdfPath)); var data = new Uint8Array(fs.readFileSync(pdfPath));
// Dumps svg outputs to a folder called svgdump // Dumps svg outputs to a folder called svgdump
function writeToFile(svgdump, pageNum) { function writeToFile(svgdump, pageNum, callback) {
var name = getFileNameFromPath(pdfPath); var name = getFileNameFromPath(pdfPath);
fs.mkdir('./svgdump/', function(err) { fs.mkdir('./svgdump/', function(err) {
if (!err || err.code === 'EEXIST') { if (!err || err.code === 'EEXIST') {
@ -29,7 +29,10 @@ function writeToFile(svgdump, pageNum) {
} else { } else {
console.log('Page: ' + pageNum); console.log('Page: ' + pageNum);
} }
callback();
}); });
} else {
callback();
} }
}); });
} }
@ -67,7 +70,9 @@ pdfjsLib.getDocument({
svgGfx.embedFonts = true; svgGfx.embedFonts = true;
return svgGfx.getSVG(opList, viewport).then(function (svg) { return svgGfx.getSVG(opList, viewport).then(function (svg) {
var svgDump = svg.toString(); var svgDump = svg.toString();
writeToFile(svgDump, pageNum); return new Promise(function(resolve) {
writeToFile(svgDump, pageNum, resolve);
});
}); });
}); });
}) })