Custom message box for 3DS (#1932)

CMakeLists.txt

@@ -475,7 +475,8 @@ if(N3DS)
   list(APPEND devilutionx_SRCS
     Source/platform/ctr/system.cpp
     Source/platform/ctr/keyboard.cpp
-    Source/platform/ctr/display.cpp)
+    Source/platform/ctr/display.cpp
+    Source/platform/ctr/messagebox.cpp)
   set(BIN_TARGET ${BIN_TARGET}.elf)
 endif()
 

Source/platform/ctr/messagebox.cpp

@@ -0,0 +1,29 @@
+#include <3ds.h>
+#include <SDL.h>
+#include <fmt/core.h>
+#include "utils/sdl2_to_1_2_backports.h"
+
+int SDL_ShowSimpleMessageBox(Uint32 flags,
+    const char *title,
+    const char *message,
+    SDL_Surface *window)
+{
+	if (SDL_ShowCursor(SDL_DISABLE) <= -1)
+		SDL_Log("%s", SDL_GetError());
+
+	bool init = !gspHasGpuRight();
+	auto text = fmt::format("{}\n\n{}", title, message);
+
+	if (init)
+		gfxInitDefault();
+
+	errorConf error;
+	errorInit(&error, ERROR_TEXT, CFG_LANGUAGE_EN);
+	errorText(&error, text.c_str());
+	errorDisp(&error);
+
+	if (init)
+		gfxExit();
+
+	return 0;
+}

Source/utils/sdl2_to_1_2_backports.h

@@ -123,6 +123,13 @@ enum {
 	// clang-format on
 };
 
+#ifdef __3DS__
+/** Defined in Source/platform/ctr/messagebox.cpp */
+int SDL_ShowSimpleMessageBox(Uint32 flags,
+    const char *title,
+    const char *message,
+    SDL_Surface *window);
+#else
 inline int SDL_ShowSimpleMessageBox(Uint32 flags,
     const char *title,
     const char *message,
@@ -131,6 +138,7 @@ inline int SDL_ShowSimpleMessageBox(Uint32 flags,
 	SDL_Log("MSGBOX: %s\n%s", title, message);
 	return 0;
 }
+#endif
 
 //= Window handling