Fix code page issue on windows

README.md

@@ -104,7 +104,6 @@ Not all terminals will actually offer a pleasant experience. The main criteria a
 
 - **Support for UTF-8 and good rendering of unicode block elements**
   More specifically the following characters `▄ █ ▀`.
-  Changing the code page might be necessary on windows, using `chcp 65001`.
   Also, the alignement might be off (e.g small spaces between pixels)
   This is not always well supported.
 
@@ -136,8 +135,8 @@ About Windows:
 
 | Windows          | Status     | Colors        | Unicode rendering      | Performance | Comments                 |
 |------------------|------------|---------------|------------------------|-------------|--------------------------|
-| Windows terminal | Unpleasant | 24-bit colors | Good (`chcp 65001`)    | 30 FPS      | Buggy display            |
-| Cmder            | Unplayable | 24-bit colors | Good (`chcp 65001`)    | 2 FPS       | No window title          |
+| Windows terminal | Unpleasant | 24-bit colors | Good                   | 30 FPS      | Buggy display            |
+| Cmder            | Unplayable | 24-bit colors | Good                   | 2 FPS       | No window title          |
 | Terminus         | Unplayable | 24-bit colors | Misalignments          | 10 FPS      |                          |
 | Command prompt   | Broken     | N/A           | N/A                    | N/A         | No ANSI code support     |
 | Git bash         | Broken     | N/A           | N/A                    | N/A         | Doesn't work with winpty |

gambaterm/run.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import os
+import sys
 import time
 import contextlib
 from itertools import count
@@ -31,6 +32,20 @@ def get_ref(width: int, height: int, console: Console) -> tuple[int, int]:
     return refx, refy
 
 
+def write_bytes(app_session: AppSession, video_data: bytes) -> None:
+    # Fix code page issue on windows:
+    # `sys.stdout.buffer.raw` is a `WindowsConsoleIO` that always support UTF-8
+    # regardless of the configured codepage
+    if (
+        sys.platform == "win32"
+        and app_session.output.fileno() == sys.stdout.fileno()
+        and hasattr(sys.stdout.buffer, "raw")
+    ):
+        sys.stdout.buffer.raw.write(video_data)
+    else:
+        os.write(app_session.output.fileno(), video_data)
+
+
 def run(
     console: Console,
     get_input: InputGetter,
@@ -140,7 +155,7 @@ def run(
             # Video sync
             if video_data:
                 # Write video frame, might block
-                os.write(app_session.output.fileno(), video_data)
+                write_bytes(app_session, video_data)
                 # Send CPR request
                 if use_cpr_sync:
                     app_session.output.ask_for_cpr()