shithub: freetype+ttf2subf

Download patch

ref: 9d8e6c29801c95ca170578a209ba2308dd8efa99
parent: 68bc56f864e3e1acd00870ca04085f387b144494
author: Werner Lemberg <[email protected]>
date: Sat Jun 16 06:11:58 EDT 2018 

* src/base/ftbitmap.c (FT_Bitmap_Blend): Avoid integer overflow.

git/fs: mount .git/fs: mount/attach disallowed 
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2018-06-16  Werner Lemberg  <[email protected]>
 
+	* src/base/ftbitmap.c (FT_Bitmap_Blend): Avoid integer overflow.
+
+2018-06-16  Werner Lemberg  <[email protected]>
+
 	Add `FT_Bitmap_Blend' API.
 
 	Still missing: Support for negative bitmap pitch and subpixel offset
--- a/src/base/ftbitmap.c
+++ b/src/base/ftbitmap.c
@@ -901,8 +901,11 @@
     source_llx -= final_llx;
     source_lly -= final_lly;
 
-    target_llx -= final_llx;
-    target_lly -= final_lly;
+    if ( target->width && target->rows )
+    {
+      target_llx -= final_llx;
+      target_lly -= final_lly;
+    }
 
     /* set up target bitmap */
     if ( target->pixel_mode == FT_PIXEL_MODE_NONE )