From 2579ed6b432c64ae0732342cebd83fde88492eee Mon Sep 17 00:00:00 2001
From: Jeffitus <49927060+Jeffitus@users.noreply.github.com>
Date: Fri, 17 Apr 2020 15:47:22 -0500
Subject: [PATCH] Some minor optimizations for 1.0 release

---
 src/drawing.c | 1 -
 src/game.c    | 5 ++++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/drawing.c b/src/drawing.c
index c7c8b0a..6de60b5 100644
--- a/src/drawing.c
+++ b/src/drawing.c
@@ -64,7 +64,6 @@ bool draw_puzzle(void) {
         }
     }
 
-    gfx_BlitBuffer();
     return puzzle_filled;
 }
 
diff --git a/src/game.c b/src/game.c
index 89ed48c..1912243 100644
--- a/src/game.c
+++ b/src/game.c
@@ -333,12 +333,15 @@ void reveal_solution(void) {
 
     for (i = 0; i < 9; i++) {
         for (j = 0; j < 9; j++) {
-            puzzle[i][j] |= SOLUTION(puzzle[i][j] & SOLUTION_DATA);
+            if (puzzle[i][j] & UNDEFINED) {
+                puzzle[i][j] = SOLUTION(puzzle[i][j] & SOLUTION_DATA) | UNDEFINED;
+            }
         }
     }
 
     draw_grid();
     draw_puzzle();
+    gfx_BlitBuffer();
     wait_for_key_press();
     wait_for_key_release();
 }
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