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feat: Improve Sixel rendering stability by adjusting output height and anchoring behavior

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Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>
This commit is contained in:
Hans Kokx
2026-03-20 18:03:19 +01:00
parent 1e5222368a
commit 2598218a4d
2 changed files with 25 additions and 12 deletions
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15
apps/wolf_3d_cli/lib/cli_game_loop.dart
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@@ -68,7 +68,8 @@ class CliGameLoop {
}
}
stdout.write('\x1b[?25l\x1b[2J');
// Disable Sixel scrolling mode so frames overwrite in-place.
stdout.write('\x1b[?80l\x1b[?25l\x1b[2J');
_stdinSubscription = _stdinStream.listen(_handleInput);
_stopwatch.start();
@@ -101,7 +102,8 @@ class CliGameLoop {
}
if (stdout.hasTerminal) {
stdout.write('\x1b[0m\x1b[?25h');
// Restore scrolling Sixel mode and cursor visibility.
stdout.write('\x1b[0m\x1b[?80h\x1b[?25h');
}
_isRunning = false;
@@ -200,12 +202,15 @@ class CliGameLoop {
return;
}
final int safeCols = cols > 1 ? cols - 1 : cols;
final String hint = _buildShortcutHintText();
final String visible = hint.length > cols ? hint.substring(0, cols) : hint;
final String padded = visible.padRight(cols);
final String visible = hint.length > safeCols
? hint.substring(0, safeCols)
: hint;
final String padded = visible.padRight(safeCols);
// Draw an overlay line without disturbing the renderer's cursor position.
stdout.write('\x1b[s\x1b[1;1H\x1b[0m\x1b[2m$padded\x1b[0m\x1b[u');
stdout.write('\x1b[s\x1b[1;1H\x1b[0m\x1b[2m\x1b[2K$padded\x1b[0m\x1b[u');
}
String _buildShortcutHintText() {