From 19b8c1fa5676f2ba8828246a07c5ab80ac505394 Mon Sep 17 00:00:00 2001
From: olikraus <olikraus@gmail.com>
Date: Sat, 7 Jan 2017 15:10:43 +0100
Subject: [PATCH] issue #56

---
 csrc/u8g2_ll_hvline.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/csrc/u8g2_ll_hvline.c b/csrc/u8g2_ll_hvline.c
index 3e5c77ae..8df00175 100644
--- a/csrc/u8g2_ll_hvline.c
+++ b/csrc/u8g2_ll_hvline.c
@@ -33,6 +33,19 @@
   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
   ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
 
+
+  *ptr |= or_mask
+  *ptr ^= xor_mask
+  
+  color = 0:   or_mask = 1, xor_mask = 1
+  color = 1:   or_mask = 1, xor_mask = 0
+  color = 2:   or_mask = 0, xor_mask = 1
+
+  if ( color <= 1 )
+    or_mask  = mask;
+  if ( color != 1 )
+    xor_mask = mask;
+    
 */
 
 #include "u8g2.h"