[pango] docs: Add extent images

[Matthias Clasen <matthiasc src gnome org>]

commit a43d5d3b4a15e9faf9c50e9c44aeb547cd53ce34
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Aug 4 15:57:03 2019 -0400

    docs: Add extent images
    
    Add an illustration of logical and ink rects.

 docs/meson.build    |   2 ++
 docs/rects1.png     | Bin 0 -> 11457 bytes
 docs/rects2.png     | Bin 0 -> 11910 bytes
 pango/glyphstring.c |   4 ++++
 4 files changed, 6 insertions(+)
---
diff --git a/docs/meson.build b/docs/meson.build
index 6f148221..419ab503 100644
--- a/docs/meson.build
+++ b/docs/meson.build
@@ -65,6 +65,8 @@ html_images = [
   'layout.png',
   'pipeline.png',
   'rotated-text.png',
+  'rects1.png',
+  'rects2.png',
 ]
 
 docdeps = [ libpango_dep ]
diff --git a/docs/rects1.png b/docs/rects1.png
new file mode 100644
index 00000000..a0dd9e93
Binary files /dev/null and b/docs/rects1.png differ
diff --git a/docs/rects2.png b/docs/rects2.png
new file mode 100644
index 00000000..e79ec448
Binary files /dev/null and b/docs/rects2.png differ
diff --git a/pango/glyphstring.c b/pango/glyphstring.c
index 007f8a34..6c674e03 100644
--- a/pango/glyphstring.c
+++ b/pango/glyphstring.c
@@ -271,6 +271,10 @@ pango_glyph_string_extents_range (PangoGlyphString *glyphs,
  * Compute the logical and ink extents of a glyph string. See the documentation
  * for pango_font_get_glyph_extents() for details about the interpretation
  * of the rectangles.
+ *
+ * Examples of logical (red) and ink (green) rects:
+ *
+ * ![](rects1.png) ![](rects2.png)
  */
 void
 pango_glyph_string_extents (PangoGlyphString *glyphs,