Sakurai/pdf.js
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Avoid creating intermediate strings in Util.makeCssRgb().

Browse Source 
On one example (the Wuppertal map) this avoids the creation of over
230,000 intermediate strings.
This commit is contained in:
Nicholas Nethercote 2014-07-08 21:31:07 -07:00
parent 2e98f9095e
commit 31c613f064
1 changed files with 8 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/shared/util.js
View File

@ -560,8 +560,15 @@ var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];
var Util = PDFJS.Util = (function UtilClosure() {
function Util() {}
var rgbBuf = ['rgb(', 0, ',', 0, ',', 0, ')'];
// makeCssRgb() can be called thousands of times. Using |rgbBuf| avoids
// creating many intermediate strings.
Util.makeCssRgb = function Util_makeCssRgb(rgb) {
return 'rgb(' + rgb[0] + ',' + rgb[1] + ',' + rgb[2] + ')';
rgbBuf[1] = rgb[0];
rgbBuf[3] = rgb[1];
rgbBuf[5] = rgb[2];
return rgbBuf.join('');
};
// Concatenates two transformation matrices together and returns the result.