From 915b186bdc94c6a79537dbe1e7479af2d26f5081 Mon Sep 17 00:00:00 2001
From: Adam Saponara <as@php.net>
Date: Sun, 2 Apr 2023 20:06:56 -0400
Subject: [PATCH] invalidate last_(fg|bg) after mode switch

last_(fg|bg) are no longer valid after a mode switch. see the test
for an example of the bug in action.
---
 termbox2.h                           |  2 ++
 tests/test_output_mode/expected.ansi | 24 ++++++++++++++++++++++++
 tests/test_output_mode/test.php      | 17 +++++++++++++++++
 3 files changed, 43 insertions(+)
 create mode 100644 tests/test_output_mode/expected.ansi
 create mode 100755 tests/test_output_mode/test.php

diff --git a/termbox2.h b/termbox2.h
index 584cf91..e2311e8 100644
--- a/termbox2.h
+++ b/termbox2.h
@@ -1690,6 +1690,8 @@ int tb_set_output_mode(int mode) {
 #ifdef TB_OPT_TRUECOLOR
         case TB_OUTPUT_TRUECOLOR:
 #endif
+            global.last_fg = ~global.fg;
+            global.last_bg = ~global.bg;
             global.output_mode = mode;
             return TB_OK;
     }
diff --git a/tests/test_output_mode/expected.ansi b/tests/test_output_mode/expected.ansi
new file mode 100644
index 0000000..466ae50
--- /dev/null
+++ b/tests/test_output_mode/expected.ansi
@@ -0,0 +1,24 @@
+#5cyan (even after mode switch)
+#5[0;38:5:238mg[0;38:5:238mr[0;38:5:238ma[0;38:5:238my
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/tests/test_output_mode/test.php b/tests/test_output_mode/test.php
new file mode 100755
index 0000000..cee4897
--- /dev/null
+++ b/tests/test_output_mode/test.php
@@ -0,0 +1,17 @@
+<?php
+declare(strict_types=1);
+
+$test->ffi->tb_init();
+
+$y = 0;
+$fg = 7;
+
+$test->ffi->tb_printf(0, $y++, $fg, 0, "cyan (even after mode switch)");
+$test->ffi->tb_present();
+
+$test->ffi->tb_set_output_mode($test->defines['TB_OUTPUT_GRAYSCALE']);
+
+$test->ffi->tb_printf(0, $y++, $fg, 0, "gray");
+$test->ffi->tb_present();
+
+$test->screencap();
-- 
2.39.5