Adding sixel support ref. #7

patches.def.h

@@ -208,6 +208,26 @@
  */
 #define SINGLE_DRAWABLE_BUFFER_PATCH 0
 
+/* This patch adds SIXEL graphics support for st.
+ * Note that patch/sixel.c/sixel_hls.c come from mintty, licensed under GPL.
+ * Known issues:
+ *    - Entering clear causes all sixels to be deleted from scrollback.
+ *    - Rendering sixel graphics may cause unusual cursor placement, this is
+ *      not specific to this variant of st - the same issue is present in
+ *      the xterm implementation. This is likely an issue of sixel height
+ *      not being detected correctly.
+ *    - If combined with the alpha patch sixel graphics disappear (become white)
+ *      when transparent and rendered against a white background. This is believed
+ *      to be related to how the sixel graphics use RGB colors instead of RGBA.
+ *      A pull request or instructions for how to properly add alpha support for
+ *      sixel graphics would be very welcome.
+ *
+ * Note that you need to uncomment the corresponding lines in Makefile when including this patch.
+ *
+ * https://gist.github.com/saitoha/70e0fdf22e3e8f63ce937c7f7da71809
+ */
+#define SIXEL_PATCH 0
+
 /* This patch allows clients to embed into the st window and is useful if you tend to
  * start X applications from the terminal. For example:
  *