From 47f0326eee80dfd00006bf5a4ca12ce0d81efcf4 Mon Sep 17 00:00:00 2001
From: Andreas Gal <andreas.gal@gmail.com>
Date: Sat, 4 Jun 2011 23:01:25 -0700
Subject: [PATCH] parse Interpolate and ImageMask for images

---
 pdf.js | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/pdf.js b/pdf.js
index 956bde4b8..1f74f0ef5 100644
--- a/pdf.js
+++ b/pdf.js
@@ -1888,8 +1888,21 @@ var CanvasGraphics = (function() {
             this.save();
 
             // TODO cache rendered images?
-            var w = image.dict.get("Width");
-            var h = image.dict.get("Height");
+
+            var dict = image.dict;
+            var w = dict.get("Width") || dict.get("W");
+            var h = dict.get("Height") || dict.get("H");
+
+            if (w < 1 || h < 1)
+                error("Invalid image width or height");
+
+            var interpolate = dict.get("Interpolate") || dict.get("I");
+            if (!IsBool(interpolate))
+                interpolate = false;
+            var imageMask = dict.get("ImageMask") || dict.get("IM");
+            if (!IsBool(imageMask))
+                imageMask = false;
+
             var tmpCanvas = document.createElement("canvas");
             tmpCanvas.width = w;
             tmpCanvas.height = h;