[pango] Win32: Reset BkMode so ETO doesn't draw its own

[Matthias Clasen <matthiasc src gnome org>]

commit 72e16506d6bd43efe4db24ebc3f69537f7208b1a
Author: Nicolas Hake <nh nosebud de>
Date:   Mon Jul 11 13:22:05 2016 +0200

    Win32: Reset BkMode so ETO doesn't draw its own
    
    If the DC's background mode is set to OPAQUE, ExtTextOut will draw its
    own background boxes around glyph items. Since we don't place any
    requirements on the DC, set the background mode to TRANSPARENT before
    rendering any glyphs (and reset it to its original value afterwards).
    
    https://bugzilla.gnome.org/show_bug.cgi?id=768679

 pango/pangowin32.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/pango/pangowin32.c b/pango/pangowin32.c
index d39cf8b..04e0d51 100644
--- a/pango/pangowin32.c
+++ b/pango/pangowin32.c
@@ -1020,6 +1020,7 @@ pango_win32_render_layout_line (HDC              hdc,
   PangoRectangle overall_rect;
   PangoRectangle logical_rect;
   PangoRectangle ink_rect;
+  int oldbkmode = SetBkMode (hdc, TRANSPARENT);
 
   int x_off = 0;
 
@@ -1145,6 +1146,8 @@ pango_win32_render_layout_line (HDC              hdc,
 
       x_off += logical_rect.width;
     }
+
+    SetBkMode (hdc, oldbkmode);
 }
 
 /**