[reactos] 01/01: [NTGDI][FREETYPE] Return non-zero gm.gmBlackBoxX/Y (#2643)

[Katayama Hirofumi MZ]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=52fb8c1a8d1d1ef2ddb46c...

commit 52fb8c1a8d1d1ef2ddb46c017b461011b26188ee
Author:     Katayama Hirofumi MZ [e-mail]
AuthorDate: Thu Apr 23 22:02:41 2020 +0900
Commit:     GitHub [e-mail]
CommitDate: Thu Apr 23 22:02:41 2020 +0900

[NTGDI][FREETYPE] Return non-zero gm.gmBlackBoxX/Y (#2643)

In return of GetGlyphOutline function call, gm.gmBlackBoxX and gm.gmBlackBoxY must be non-zero to avoid Division by Zero. At epilogue of ftGdiGetGlyphOutline, we adjust the values. CORE-15949
---
 win32ss/gdi/ntgdi/freetype.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/win32ss/gdi/ntgdi/freetype.c b/win32ss/gdi/ntgdi/freetype.c
index 7d646807e7b..c53bf1a12aa 100644
--- a/win32ss/gdi/ntgdi/freetype.c
+++ b/win32ss/gdi/ntgdi/freetype.c
@@ -4203,6 +4203,12 @@ ftGdiGetGlyphOutline(
     }

DPRINT("ftGdiGetGlyphOutline END and needed %lu\n", needed);
+
+    if (gm.gmBlackBoxX == 0)
+        gm.gmBlackBoxX = 1;
+    if (gm.gmBlackBoxY == 0)
+        gm.gmBlackBoxY = 1;
+
     *pgm = gm;
     return needed;
 }