commit cec2397fc0542516cac16615f63ab89032806a2e
author Albert Astals Cid <aacid@kde.org> Fri Sep 27 16:56:33 2019 +0200
committer Albert Astals Cid <aacid@kde.org> Fri Sep 27 16:56:33 2019 +0200
tree bdca57e3ae39b02f0eced474155b33d1cf14d18d
parent 0e8ed9a34e04cc4e56b31f4057c267630c4a7656

Annot: Protect against division by 0.0

poppler/Annot.cc

diff --git a/poppler/Annot.cc b/poppler/Annot.cc
index b51eeae..56b9b93 100644
--- a/poppler/Annot.cc
+++ b/poppler/Annot.cc
@@ -4084,7 +4084,7 @@
   GooString convertedText;
   const GfxFont *font;
   double dx, dy;
-  double fontSize, fontSize2, borderWidth, x, xPrev, y, w, wMax;
+  double fontSize, borderWidth, x, xPrev, y, w, wMax;
   int tfPos, tmPos, j;
   int rot;
   bool freeText = false;      // true if text should be freed before return
@@ -4415,9 +4415,11 @@
       // compute font autosize
       if (fontSize == 0) {
         fontSize = dy - 2 * borderWidth;
-        fontSize2 = (dx - 4 - 2 * borderWidth) / w;
-        if (fontSize2 < fontSize) {
-          fontSize = fontSize2;
+        if (w > 0) {
+          const double fontSize2 = (dx - 4 - 2 * borderWidth) / w;
+          if (fontSize2 < fontSize) {
+            fontSize = fontSize2;
+          }
         }
         fontSize = floor(fontSize);
         if (tfPos >= 0) {
@@ -4499,7 +4501,7 @@
   GooString *tok;
   GooString convertedText;
   const GfxFont *font;
-  double fontSize, fontSize2, borderWidth, x, y, w, wMax;
+  double fontSize, borderWidth, x, y, w, wMax;
   int tfPos, tmPos, i, j;
 
   //~ if there is no MK entry, this should use the existing content stream,
@@ -4585,7 +4587,7 @@
       }
     }
     fontSize = rect->y2 - rect->y1 - 2 * borderWidth;
-    fontSize2 = (rect->x2 - rect->x1 - 4 - 2 * borderWidth) / wMax;
+    const double fontSize2 = (rect->x2 - rect->x1 - 4 - 2 * borderWidth) / wMax;
     if (fontSize2 < fontSize) {
       fontSize = fontSize2;
     }