From 0527b8bc8d4312c7aea4b48b246fef0ba5df5abb Mon Sep 17 00:00:00 2001
From: mduan <duan.mack@gmail.com>
Date: Fri, 18 Jan 2013 15:06:12 -0800
Subject: [PATCH] Fix invalid version number in truetype 'head' table
---
src/fonts.js | 19 +++++++++++++++++++
test/pdfs/issue2531.pdf.link | 1 +
test/test_manifest.json | 8 ++++++++
3 files changed, 28 insertions(+)
create mode 100644 test/pdfs/issue2531.pdf.link
diff --git a/src/fonts.js b/src/fonts.js
index c70831bcb..97a296fbf 100644
--- a/src/fonts.js
+++ b/src/fonts.js
@@ -3254,6 +3254,21 @@ var Font = (function FontClosure() {
return glyf.length;
}
+ function sanitizeHead(head) {
+ var data = head.data;
+
+ // Validate version:
+ // Should always be 0x00010000
+ var version = int32([data[0], data[1], data[2], data[3]]);
+ if (version >> 16 !== 1) {
+ info('Invalid version in data type: ' + version);
+ data[0] = 0;
+ data[1] = 1;
+ data[2] = 0;
+ data[3] = 0;
+ }
+ }
+
function sanitizeGlyphLocations(loca, glyf, numGlyphs,
isGlyphLocationsLong) {
var itemSize, itemDecode, itemEncode;
@@ -3678,6 +3693,10 @@ var Font = (function FontClosure() {
sanitizeTTPrograms(fpgm, prep);
+ if (head) {
+ sanitizeHead(head);
+ }
+
var isGlyphLocationsLong = int16([head.data[50], head.data[51]]);
if (head && loca && glyf) {
sanitizeGlyphLocations(loca, glyf, numGlyphs, isGlyphLocationsLong);
diff --git a/test/pdfs/issue2531.pdf.link b/test/pdfs/issue2531.pdf.link
new file mode 100644
index 000000000..70f40062c
--- /dev/null
+++ b/test/pdfs/issue2531.pdf.link
@@ -0,0 +1 @@
+http://www.rcjohnso.com/Looper/Looper.pdf
diff --git a/test/test_manifest.json b/test/test_manifest.json
index 9467dcb6b..f612cea6e 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -30,6 +30,14 @@
"rounds": 1,
"type": "eq"
},
+ { "id": "issue2531",
+ "file": "pdfs/issue2531.pdf",
+ "md5": "c58e6642d8a6e2ddd5e07a543ef8f30d",
+ "link": true,
+ "rounds": 1,
+ "pageLimit": 4,
+ "type": "eq"
+ },
{ "id": "html5-canvas-cheat-sheet-load",
"file": "pdfs/canvas.pdf",
"md5": "59510028561daf62e00bf9f6f066b033",