From 7a38b04192b762d36bea1c233c58f225d5e69e08 Mon Sep 17 00:00:00 2001
From: sommermorgentraum <24917424+zxkmm@users.noreply.github.com>
Date: Sat, 19 Oct 2024 21:31:49 +0800
Subject: [PATCH] fix read data of display (#2312)

---
 firmware/common/portapack_io.hpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/firmware/common/portapack_io.hpp b/firmware/common/portapack_io.hpp
index b25cdb7f..09646f2f 100644
--- a/firmware/common/portapack_io.hpp
+++ b/firmware/common/portapack_io.hpp
@@ -416,8 +416,12 @@ class IO {
         const auto value_low = data_read();
         uint32_t original_value = (value_high << 8) | value_low;
 
+        if (get_is_inverted()) return original_value;
+
         if (get_dark_cover()) {
-            original_value = DARKENED_PIXEL(original_value, get_brightness());
+            // this is read data, so if the fake brightness is enabled AKA get_dark_cover() == true,
+            // then shift to back side AKA UNDARKENED_PIXEL, to prevent read shifted darkern info
+            original_value = UNDARKENED_PIXEL(original_value, get_brightness());
         }
         return original_value;
     }