From e7698686fa4b61f006520aadddd78bcc64e794b2 Mon Sep 17 00:00:00 2001
From: OODLER <oodler@cpan.org>
Date: Wed, 20 Dec 2023 16:49:47 -0600
Subject: [PATCH] fixed a glitch in the prog8/vtui example (#117)

When the program starts, before the screen is modified, save_rec
is called to capture the cx16 logo.

The fix was to not do the second call to save_rec until after
vtui is used to draw the boxes on the screen.

Before the this fix, the initial replacement issue was of the
logo and not the portion of the screen originally modified by
vtui.
---
 examples/cx16/vtui/testvtui.p8 | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/examples/cx16/vtui/testvtui.p8 b/examples/cx16/vtui/testvtui.p8
index bce755ff2..979cb31e3 100644
--- a/examples/cx16/vtui/testvtui.p8
+++ b/examples/cx16/vtui/testvtui.p8
@@ -8,13 +8,16 @@
 main {
     sub start() {
         vtui.initialize()
-        store_logo()
+        store_logo()            ; capture logo before boxes are drawn
 
         txt.lowercase()
         vtui.screen_set(0)
         vtui.clr_scr('%', $50)
         vtui.gotoxy(5,5)
         vtui.fill_box(':', 70, 50, $c6)
+
+        store_where_logo_was()  ; after vtui draws boxes, initialize replacement screen values as logo moves
+
         vtui.gotoxy(10,10)
         vtui.border(1, 40, 6, $47)
         vtui.gotoxy(12,12)
@@ -45,6 +48,9 @@ main {
     sub store_logo() {
         vtui.gotoxy(0, 0)
         vtui.save_rect($80, 1, $0000, 7, 7)
+    }
+
+    sub store_where_logo_was() {
         vtui.gotoxy(0, 0)
         vtui.save_rect($80, 1, $0100, 7, 7)
     }