3 files changed, 9 insertions, 3 deletions
diff --git a/source/blender/blenfont/intern/blf.c b/source/blender/blenfont/intern/blf.c
index 132a0ec3808..5bd62980b6d 100644
--- a/source/blender/blenfont/intern/blf.c
+++ b/source/blender/blenfont/intern/blf.c
@@ -96,15 +96,16 @@ static FontBLF *blf_get(int fontid)
 	return NULL;
 }
 
-int BLF_init(int points, int dpi)
+int BLF_init(void)
 {
 	int i;
 
 	for (i = 0; i < BLF_MAX_FONT; i++)
 		global_font[i] = NULL;
 
-	global_font_points = points;
-	global_font_dpi = dpi;
+	global_font_points = 11;
+	global_font_dpi = 72;
+
 	return blf_font_init();
 }
 
diff --git a/source/blender/blenfont/intern/blf_glyph.c b/source/blender/blenfont/intern/blf_glyph.c
index aa7d539538b..bbbabfb8ba2 100644
--- a/source/blender/blenfont/intern/blf_glyph.c
+++ b/source/blender/blenfont/intern/blf_glyph.c
@@ -135,6 +135,7 @@ void blf_glyph_cache_clear(FontBLF *font)
 	while ((gc = BLI_pophead(&font->cache))) {
 		blf_glyph_cache_free(gc);
 	}
+	font->glyph_cache = NULL;
 }
 
 void blf_glyph_cache_free(GlyphCacheBLF *gc)
diff --git a/source/blender/blenfont/intern/blf_thumbs.c b/source/blender/blenfont/intern/blf_thumbs.c
index 133168fccf2..b6f5ffbb092 100644
--- a/source/blender/blenfont/intern/blf_thumbs.c
+++ b/source/blender/blenfont/intern/blf_thumbs.c
@@ -98,6 +98,10 @@ void BLF_thumb_preview(
 
 		blf_font_size(font, (unsigned int)MAX2(font_size_min, font_size_curr), dpi);
 
+		/* font->glyph_cache remains NULL if blf_font_size() failed to set font size */
+		if (!font->glyph_cache)
+			break;
+
 		/* decrease font size each time */
 		font_size_curr -= (font_size_curr / font_shrink);
 		font_shrink += 1;