From e66480b56f9e09ded9a355dc1a9c109d8c6e3571 Mon Sep 17 00:00:00 2001
From: Alexei Podtelezhnikov <apodtele@gmail.com>
Date: Tue, 3 Jan 2023 20:41:42 +0000
Subject: * src/base/ftobjs.c (FT_Request_Metrics): Avoid division by zero.

The division-by-zero might happen in broken fonts (see #1194).
Instead of returning a huge number from FT_DivFix until and failing
to scale later, we now bail immediately.
---
 src/base/ftobjs.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/base/ftobjs.c b/src/base/ftobjs.c
index 7f1f063cc..8b99a2088 100644
--- a/src/base/ftobjs.c
+++ b/src/base/ftobjs.c
@@ -3276,6 +3276,14 @@
       if ( h < 0 )
         h = -h;
 
+      if ( ( !w && req->width )                     ||
+           ( !h && ( req->height || !req->width ) ) )
+      {
+        FT_ERROR(( "FT_Request_Metrics: Divide by zero\n" ));
+        error = FT_ERR( Divide_By_Zero );
+        goto Exit;
+      }
+
       scaled_w = FT_REQUEST_WIDTH ( req );
       scaled_h = FT_REQUEST_HEIGHT( req );
 
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