BMP also works (1bit bitmaps are not supported by stb-image library)

radio/src/bmp.cpp

@@ -427,6 +427,7 @@ const char *writeScreenshot()
 #define STB_IMAGE_IMPLEMENTATION
 #define STBI_ONLY_PNG
 #define STBI_ONLY_JPEG
+#define STBI_ONLY_BMP
 #include "thirdparty/Stb/stb_image.h"
 
 

radio/src/gui/horus/menu_general_sdmanager.cpp

@@ -360,7 +360,7 @@ bool menuGeneralSdManager(evt_t _event)
   if (ext && !strcasecmp(ext, BITMAPS_EXT)) {
     if (lastBitmap != menuVerticalPosition) {
       lastBitmap = menuVerticalPosition;
-      if (bmpLoad(modelBitmap, reusableBuffer.sdmanager.lines[index], MODEL_BITMAP_WIDTH, MODEL_BITMAP_HEIGHT)) {
+      if (imgLoad(modelBitmap, reusableBuffer.sdmanager.lines[index], MODEL_BITMAP_WIDTH, MODEL_BITMAP_HEIGHT)) {
         ((uint32_t *)modelBitmap)[0] = 0;
       }
     }