From ff8dc2af8fd95d1fecbc075bb3cd6dbac0199114 Mon Sep 17 00:00:00 2001
From: Brad Barnett <127794626+bdbarnett@users.noreply.github.com>
Date: Fri, 25 Sep 2026 09:52:10 -0500
Subject: [PATCH] windows pydevices variant: run built-in module __init__ on
 import

The windows port sits at the core ROM level, where
MICROPY_MODULE_BUILTIN_INIT is off, so micropython.exe never ran jpegio's
__init__ and `import jpegio` after lv.init() left LVGL without the jpegio
decoder (PyDevices/displayif#41). Unix gets it from the extra-features level;
the windows variant now sets it directly.
---
 variants/windows/pydevices/mpconfigvariant.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/variants/windows/pydevices/mpconfigvariant.h b/variants/windows/pydevices/mpconfigvariant.h
index a5ffe18c..8d8d8130 100644
--- a/variants/windows/pydevices/mpconfigvariant.h
+++ b/variants/windows/pydevices/mpconfigvariant.h
@@ -3,3 +3,7 @@
 // -X heapsize= still overrides it. Needs patch 0012.
 #include "variants/dev/mpconfigvariant.h"
 #define MICROPY_UNIX_DEFAULT_HEAP_SIZE (8 * 1024 * 1024)
+// Run a built-in module's __init__ on import, as unix does. The windows port
+// sits at the core ROM level, where this is off, so `import jpegio` after
+// lv.init() never registered displayif's LVGL decoder (displayif#41).
+#define MICROPY_MODULE_BUILTIN_INIT (1)