From e3bef7d1a6aee1c66024de8fd6b7ed5c5db37706 Mon Sep 17 00:00:00 2001
From: Xin-Xin Wang <xin-xinw@musiclifephilosophy.com>
Date: Wed, 15 Feb 2017 12:19:32 -0500
Subject: [PATCH] Fix issue #65 (single pixel png causes an error) (#72)

---
 lib/bitmapper.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/lib/bitmapper.js b/lib/bitmapper.js
index 8d79d26..4ba5d76 100644
--- a/lib/bitmapper.js
+++ b/lib/bitmapper.js
@@ -105,10 +105,15 @@ function mapImage8Bit(image, pxData, getPxPos, bpp, data, rawPos) { // eslint-di
 
       for (var i = 0; i < 4; i++) {
         var idx = pixelBppMap[bpp][i];
-        if (i === data.length) {
-          throw new Error('Ran out of data');
+        if (idx === 0xff) {
+          pxData[pxPos + i] = 0xff;
+        } else {
+          var dataPos = idx + rawPos;
+          if (dataPos === data.length) {
+            throw new Error('Ran out of data');
+          }
+          pxData[pxPos + i] = data[dataPos];
         }
-        pxData[pxPos + i] = idx !== 0xff ? data[idx + rawPos] : 0xff;
       }
       rawPos += bpp; //eslint-disable-line no-param-reassign
     }