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From c8bec6549c10ffaa2f2fbad8bbc629efdf0dd125 Mon Sep 17 00:00:00 2001
From: Leon Bottou <leon@bottou.org>
Date: Thu, 17 Oct 2019 22:20:31 -0400
Subject: [PATCH] Fixed bug 309
---
libdjvu/IW44EncodeCodec.cpp | 2 +-
tools/ddjvu.cpp | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/libdjvu/IW44EncodeCodec.cpp b/libdjvu/IW44EncodeCodec.cpp
index 00752a0..f81eaeb 100644
--- a/libdjvu/IW44EncodeCodec.cpp
+++ b/libdjvu/IW44EncodeCodec.cpp
@@ -405,7 +405,7 @@ filter_fv(short *p, int w, int h, int rowsize, int scale)
int y = 0;
int s = scale*rowsize;
int s3 = s+s+s;
- h = ((h-1)/scale)+1;
+ h = (h>0) ? ((h-1)/scale)+1 : 0;
y += 1;
p += s;
while (y-3 < h)
diff --git a/tools/ddjvu.cpp b/tools/ddjvu.cpp
index 6d0df3b..7109952 100644
--- a/tools/ddjvu.cpp
+++ b/tools/ddjvu.cpp
@@ -279,7 +279,7 @@ render(ddjvu_page_t *page, int pageno)
prect.h = (ih * 100) / dpi;
}
/* Process aspect ratio */
- if (flag_aspect <= 0)
+ if (flag_aspect <= 0 && iw>0 && ih>0)
{
double dw = (double)iw / prect.w;
double dh = (double)ih / prect.h;
--
2.23.0
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