From 89610c84dc83c852ea33d8c90301d4b7c30a775d Mon Sep 17 00:00:00 2001
From: Nicolas Roggeman <nicolas.roggeman@ledger.fr>
Date: Fri, 12 Jul 2024 10:57:59 +0200
Subject: [PATCH] Fix wrong display of some image files when BPP is not
 properly set in area

---
 src/bolos/nbgl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/bolos/nbgl.c b/src/bolos/nbgl.c
index 29186e91..606e7b82 100644
--- a/src/bolos/nbgl.c
+++ b/src/bolos/nbgl.c
@@ -118,6 +118,10 @@ unsigned long sys_nbgl_front_draw_img_file(nbgl_area_t *area, uint8_t *buffer,
   }
   size_t len = sizeof(nbgl_area_t) + 1;
   size_t buffer_len = 0;
+
+  // force area bpp with the value from "file" to avoid some issues
+  area->bpp = (buffer[4] >> 4) & 0xF;
+
   switch (compressed) {
   case 0: // no compression
     buffer_len = (area->width * area->height * (area->bpp + 1)) / 8;