From 5e6b378965fc8e969309059aa4ea7e5d239ab3b5 Mon Sep 17 00:00:00 2001
From: Jules Laplace <jules@okfoc.us>
Date: Wed, 11 May 2016 15:28:45 -0400
Subject: add inverted cross brush, smear brush, pick brush style..

---
 js/blit.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'js/blit.js')

diff --git a/js/blit.js b/js/blit.js
index 2e41f5c..b434742 100644
--- a/js/blit.js
+++ b/js/blit.js
@@ -78,6 +78,17 @@ var blit = (function(){
       }
     })
   }
+  blit.inverted_cross = function(A, lex){
+    // 1x1 brush should still draw something
+    if (A.w == 1 && A.h == 1) {
+      return
+    }
+    A.forEach(function(lex,x,y) {
+      if (!((x+y)%2)) {
+        lex.clear()
+      }
+    })
+  }
   blit.square = function(A, lex){
   	// i.e. no transparency
   }
-- 
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