master 60199ac01d7 2/2: ; * src/ftfont.c (ftfont_glyph_metrics): Comment on advance rounding.

[Po Lu]

branch: master
commit 60199ac01d711d3240146afedd830b774eb5c5d2
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    ; * src/ftfont.c (ftfont_glyph_metrics): Comment on advance rounding.
---
 src/ftfont.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/ftfont.c b/src/ftfont.c
index d3c836c0f2d..46abe35ff9a 100644
--- a/src/ftfont.c
+++ b/src/ftfont.c
@@ -1572,6 +1572,12 @@ ftfont_glyph_metrics (FT_Face ft_face, int c, int 
*advance, int *lbearing,
   if (FT_Load_Glyph (ft_face, c, FT_LOAD_DEFAULT) == 0)
     {
       FT_Glyph_Metrics *m = &ft_face->glyph->metrics;
+
+      /* At first glance this might appear to truncate the glyph's
+        horizontal advance, but FreeType internally rounds the
+        advance width to a pixel boundary prior to returning these
+        metrics.  */
+
       *advance = m->horiAdvance >> 6;
       *lbearing = m->horiBearingX >> 6;
       *rbearing = (m->horiBearingX + m->width) >> 6;