Bug 696984: Badly rendered characters.

The type3 font(s) in the file have an invalid (0 sized) bbox, hence
the clipping of the chars goes wrong.

We now spot the invalid bbox, and suppress the clipping.

1 files changed, 9 insertions, 5 deletions

diff --git a/source/fitz/font.c b/source/fitz/font.c
index 79cd050a..a291eab8 100644
--- a/source/fitz/font.c
+++ b/source/fitz/font.c
@@ -176,6 +176,7 @@ fz_set_font_bbox(fz_context *ctx, fz_font *font, float xmin, float ymin, float x
 		font->bbox.y0 = -1;
 		font->bbox.x1 = 2;
 		font->bbox.y1 = 2;
+		font->invalid_bbox = 1;
 	}
 	else
 	{
@@ -1203,11 +1204,14 @@ fz_bound_t3_glyph(fz_context *ctx, fz_font *font, int gid, fz_rect *bounds)
 		fz_rethrow(ctx);
 	}
 
-	/* clip the bbox size to a reasonable maximum for degenerate glyphs */
-	big = font->bbox;
-	m = fz_max(fz_abs(big.x1 - big.x0), fz_abs(big.y1 - big.y0));
-	fz_expand_rect(&big, fz_max(fz_matrix_expansion(&font->t3matrix) * 2, m));
-	fz_intersect_rect(bounds, &big);
+	if (!font->invalid_bbox)
+	{
+		/* clip the bbox size to a reasonable maximum for degenerate glyphs */
+		big = font->bbox;
+		m = fz_max(fz_abs(big.x1 - big.x0), fz_abs(big.y1 - big.y0));
+		fz_expand_rect(&big, fz_max(fz_matrix_expansion(&font->t3matrix) * 2, m));
+		fz_intersect_rect(bounds, &big);
+	}
 
 	return bounds;
 }