Sakurai/pdf.js
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Optimize convertOpList in svg.js by computing the operator ID mapping only once

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There is no need to recompute this for every operator list we encounter.
This commit is contained in:
Tim van der Meij 2019-04-06 16:52:29 +02:00
parent 2b18e5a355
commit 5a03b1c0d7
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GPG Key ID: 8C3FD2925A5F2762
1 changed files with 10 additions and 6 deletions
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16
src/display/svg.js
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@ -432,6 +432,14 @@ SVGGraphics = class SVGGraphics {
this.embeddedFonts = Object.create(null); this.embeddedFonts = Object.create(null);
this.cssStyle = null; this.cssStyle = null;
this.forceDataSchema = !!forceDataSchema; this.forceDataSchema = !!forceDataSchema;
// In `src/shared/util.js` the operator names are mapped to IDs.
// The list below represents the reverse of that, i.e., it maps IDs
// to operator names.
this._operatorIdMapping = [];
for (const op in OPS) {
this._operatorIdMapping[OPS[op]] = op;
}
} }
save() { save() {
@ -493,11 +501,7 @@ SVGGraphics = class SVGGraphics {
} }
convertOpList(operatorList) { convertOpList(operatorList) {
const REVOPS = []; const operatorIdMapping = this._operatorIdMapping;
for (const op in OPS) {
REVOPS[OPS[op]] = op;
}
const argsArray = operatorList.argsArray; const argsArray = operatorList.argsArray;
const fnArray = operatorList.fnArray; const fnArray = operatorList.fnArray;
const opList = []; const opList = [];
@ -505,7 +509,7 @@ SVGGraphics = class SVGGraphics {
const fnId = fnArray[i]; const fnId = fnArray[i];
opList.push({ opList.push({
'fnId': fnId, 'fnId': fnId,
'fn': REVOPS[fnId], 'fn': operatorIdMapping[fnId],
'args': argsArray[i], 'args': argsArray[i],
}); });
} }