Move font size check from interpreter to font rendering.

1 files changed, 9 insertions, 0 deletions

diff --git a/draw/glyphcache.c b/draw/glyphcache.c
index ac148340..0f8abf75 100644
--- a/draw/glyphcache.c
+++ b/draw/glyphcache.c
@@ -1,5 +1,6 @@
 #include "fitz.h"
 
+#define MAXFONTSIZE 1000
 #define MAXGLYPHSIZE 256
 #define MAXCACHESIZE (1024*1024)
 
@@ -67,6 +68,14 @@ fz_renderglyph(fz_glyphcache *cache, fz_font *font, int cid, fz_matrix ctm)
 {
 	fz_glyphkey key;
 	fz_pixmap *val;
+	float size = fz_matrixexpansion(ctm);
+
+	if (size > MAXFONTSIZE)
+	{
+		/* TODO: this case should be handled by rendering glyph as a path fill */
+		fz_warn("font size too large (%g), not rendering glyph", size);
+		return nil;
+	}
 
 	key.font = font;
 	key.cid = cid;