From 683bc1942720c80e9d47788c5217bc7b746436dd Mon Sep 17 00:00:00 2001
From: sbarman <sbarman@L3CWZ5T.(none)>
Date: Mon, 27 Jun 2011 09:58:02 -0700
Subject: [PATCH] working version of PDFImage
---
pdf.js | 32 +++++++++++++++++++++++++++++---
1 file changed, 29 insertions(+), 3 deletions(-)
diff --git a/pdf.js b/pdf.js
index 8b8e6ff54..542c0d48a 100644
--- a/pdf.js
+++ b/pdf.js
@@ -4446,14 +4446,39 @@ var PDFImage = (function() {
constructor.prototype = {
getCompFunction: function getCompFunction(bpc, width, numComps, buffer) {
var bufferPos = 0;
- if (bpc == 8) {
+ if (bpc == 1) {
+ var rowComps = width * numComps;
+ var curComp = 0;
+ var mask = 0;
+ var buf = 0;
+
+ var getComp = function() {
+ if (mask <= 0) {
+ buf = buffer[bufferPos++];
+ mask = 128;
+ }
+
+ var ret = buf & mask;
+ curComp++;
+
+ if (curComp % rowComps == 0) {
+ mask = 0;
+ buf = 0;
+ } else {
+ mask >>= 1;
+ }
+ return ret * 255;
+ }
+ } else if (bpc == 8) {
var getComp = function() {
return buffer[bufferPos++];
}
} else {
- var rowBytes = (width * numComps * bpc + 7) >> 3;
+ var rowComps = width * numComps;
+ var curComp = 0;
var bits = 0;
var buf = 0;
+
var getComp = function() {
while (bits < bpc) {
buf = (buf << 8) | buffer[bufferPos++];
@@ -4461,8 +4486,9 @@ var PDFImage = (function() {
}
var remainingBits = bits - bpc;
var ret = buf >> remainingBits;
+ curComp++;
- if (bufferPos % rowBytes == 0) {
+ if (curComp % rowComps == 0) {
buf = 0;
bits = 0;
} else {