From db09e34f71ab4e01b21888a3c7687318bc3d6d99 Mon Sep 17 00:00:00 2001
From: notmasteryet <async.processingjs@yahoo.com>
Date: Sun, 28 Aug 2011 16:14:37 -0500
Subject: [PATCH] Fix inverted B/W images in PIPEHEATCABLE.PDF

---
 pdf.js       | 22 +++++++++++++---------
 test/test.py |  2 +-
 2 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/pdf.js b/pdf.js
index 12aa9ca4c..201744efe 100644
--- a/pdf.js
+++ b/pdf.js
@@ -5133,7 +5133,7 @@ var CanvasGraphics = (function() {
         var inverseDecode = !!imageObj.decode && imageObj.decode[0] > 0;
         imageObj.applyStencilMask(pixels, inverseDecode);
       } else
-        imageObj.fillRgbaBuffer(pixels);
+        imageObj.fillRgbaBuffer(pixels, imageObj.decode);
 
       tmpCtx.putImageData(imgData, 0, 0);
       ctx.drawImage(tmpCanvas, 0, -h);
@@ -5928,7 +5928,7 @@ var PDFImage = (function() {
   };
 
   constructor.prototype = {
-    getComponents: function getComponents(buffer) {
+    getComponents: function getComponents(buffer, decodeMap) {
       var bpc = this.bpc;
       if (bpc == 8)
         return buffer;
@@ -5942,6 +5942,11 @@ var PDFImage = (function() {
       var output = new Uint8Array(length);
 
       if (bpc == 1) {
+        var valueZero = 0, valueOne = 255;
+        if (decodeMap) {
+          valueZero = decodeMap[0] ? 255 : 0;
+          valueOne = decodeMap[1] ? 255 : 0;
+        }
         var rowComps = width * numComps;
         var mask = 0;
         var buf = 0;
@@ -5959,13 +5964,11 @@ var PDFImage = (function() {
             mask = 128;
           }
 
-          var t = buf & mask;
-          if (t == 0)
-            output[i] = 0;
-          else
-            output[i] = 255;
+          output[i] = !(buf & mask) ? valueZero : valueOne;
         }
       } else {
+        if (decodeMap != null)
+          TODO('interpolate component values');
         var rowComps = width * numComps;
         var bits = 0;
         var buf = 0;
@@ -6034,7 +6037,7 @@ var PDFImage = (function() {
         }
       }
     },
-    fillRgbaBuffer: function fillRgbaBuffer(buffer) {
+    fillRgbaBuffer: function fillRgbaBuffer(buffer, decodeMap) {
       var numComps = this.numComps;
       var width = this.width;
       var height = this.height;
@@ -6044,7 +6047,8 @@ var PDFImage = (function() {
       var rowBytes = (width * numComps * bpc + 7) >> 3;
       var imgArray = this.image.getBytes(height * rowBytes);
 
-      var comps = this.colorSpace.getRgbBuffer(this.getComponents(imgArray));
+      var comps = this.colorSpace.getRgbBuffer(
+        this.getComponents(imgArray, decodeMap));
       var compsPos = 0;
       var opacity = this.getOpacity();
       var opacityPos = 0;
diff --git a/test/test.py b/test/test.py
index a6b01ec3d..d1e798d86 100644
--- a/test/test.py
+++ b/test/test.py
@@ -136,7 +136,7 @@ class PDFTestHandler(BaseHTTPRequestHandler):
         path, _ = url.path, url.query
         path = os.path.abspath(os.path.realpath(DOC_ROOT + os.sep + path))
         prefix = os.path.commonprefix(( path, DOC_ROOT ))
-        _, ext = os.path.splitext(path)
+        _, ext = os.path.splitext(path.lower())
 
         if url.path == "/favicon.ico":
             self.sendFile(os.path.join(DOC_ROOT, "test", "resources", "favicon.ico"), ext)