From: Kalervo Kujala <kkujala@>
Date: Mon, 5 Sep 2011 21:11:24 +0000 (+0300)
Subject: Fix a bug and speed up graycs_getRgbBuffer.
X-Git-Url: https://git.parisson.com/?a=commitdiff_plain;h=d4b8326496bdc65af50892df0cebe5ac897e7737;p=pdf.js.git

Fix a bug and speed up graycs_getRgbBuffer.

An rgbBuffer was created which was three times as big as intended. It also
caused that the function was very slow when rendering cable.pdf. Which led
to a slow script warning dialog.

With this fix the function speeds up fifteen-fold in the firebug profile.
---

diff --git a/pdf.js b/pdf.js
index 9a476cc..44197b4 100644
--- a/pdf.js
+++ b/pdf.js
@@ -5469,8 +5469,9 @@ var DeviceGrayCS = (function() {
     },
     getRgbBuffer: function graycs_getRgbBuffer(input, bits) {
       var scale = 255 / ((1 << bits) - 1);
-      var rgbBuf = new Uint8Array(input.length * 3);
-      for (var i = 0, j = 0; i < input.length; ++i) {
+      var length = input.length;
+      var rgbBuf = new Uint8Array(length * 3);
+      for (var i = 0, j = 0; i < length; ++i) {
         var c = (scale * input[i]) | 0;
         rgbBuf[j++] = c;
         rgbBuf[j++] = c;