notcurses_visual/notcurses-view: update man pages for sexblitter

doc/man/man1/notcurses-view.1.md

@@ -14,8 +14,8 @@ notcurses-view - Render images and video to a terminal
 
 **notcurses-view** uses a multimedia-enabled notcurses to render images
 and videos to a terminal. By default, **stretch**-type scaling is used to
-fill the rendering area, and the **quadblitter** blitter is used for a
-2x2→1 mapping from pixels to cells.
+fill the rendering area, and the **sexblitter** blitter is used for a
+3x2→1 mapping from pixels to cells.
 
 # OPTIONS
 

doc/man/man3/notcurses_visual.3.md

@@ -186,6 +186,11 @@ visual and the specified blitter.
 
 **ncvisual_geom** returns non-zero if the **blitter** is invalid.
 
+**ncvisual_default_blitter** returns the blitter selected by **NCBLIT_DEFAULT**
+in the specified configuration. If UTF8 is not enabled, this will always be
+**NCBLIT_1x1**. Otherwise, if **NCSCALE_STRETCH** is in use, this will be
+**NCBLIT_3x2**; if the scaling is any other value, **NCBLIT_2x1** will be used.
+
 # NOTES
 
 Multimedia decoding requires that Notcurses be built with either FFmpeg or