From: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
Date: Thu, 19 Feb 2015 07:17:28 +0000 (+0900)
Subject: * ftcrfont.c (ftcrfont_draw): Don't flush when drawing to screen.
X-Git-Tag: emacs-25.0.90~2008^2~15
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=3be1a7cee98ba105d3fd4c4a762250a66d90d37b;p=emacs.git

* ftcrfont.c (ftcrfont_draw): Don't flush when drawing to screen.
---

diff --git a/src/ChangeLog b/src/ChangeLog
index fea9e379d73..d2cb70e2d08 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,7 @@
+2015-02-19  YAMAMOTO Mitsuharu  <mituharu@math.s.chiba-u.ac.jp>
+
+	* ftcrfont.c (ftcrfont_draw): Don't flush when drawing to screen.
+
 2015-02-17  YAMAMOTO Mitsuharu  <mituharu@math.s.chiba-u.ac.jp>
 
 	* xterm.c [USE_CAIRO]: Include math.h.
diff --git a/src/ftcrfont.c b/src/ftcrfont.c
index d60c1202b9d..fc4e6dae873 100644
--- a/src/ftcrfont.c
+++ b/src/ftcrfont.c
@@ -246,6 +246,7 @@ ftcrfont_draw (struct glyph_string *s,
   cairo_t *cr;
   cairo_glyph_t *glyphs;
   cairo_surface_t *surface;
+  cairo_surface_type_t surface_type;
   int len = to - from;
   int i;
 
@@ -282,7 +283,12 @@ ftcrfont_draw (struct glyph_string *s,
   FT_Activate_Size (ftcrfont_info->ft_size_draw);
   cairo_show_glyphs (cr, glyphs, len);
   surface = cairo_get_target (cr);
-  if (cairo_surface_get_type (surface) != CAIRO_SURFACE_TYPE_XLIB)
+  /* XXX: It used to be necessary to flush when exporting.  It might
+     be the case that this is no longer necessary.  */
+  surface_type = cairo_surface_get_type (surface);
+  if (surface_type != CAIRO_SURFACE_TYPE_XLIB
+      && (surface_type != CAIRO_SURFACE_TYPE_IMAGE
+	  || cairo_image_surface_get_format (surface) != CAIRO_FORMAT_ARGB32))
     cairo_surface_flush (surface);
 
   x_end_cr_clip (f);