emscripten: minor refactoring

- Remove the use of EXPORTED_FUNCTIONS in favor of EMSCRIPTEN_KEEPALIVE
- SDL_Delay is no longer aliased to emscripten_sleep

src/CMakeLists.txt

@@ -42,7 +42,6 @@ elseif (EMSCRIPTEN)
     "SHELL:-s ALLOW_MEMORY_GROWTH=1"
     "SHELL:-s NO_EXIT_RUNTIME=1"
     "SHELL:-s ASYNCIFY_ADD=\"['NACT::execute()']\""
-    "SHELL:-s EXPORTED_FUNCTIONS=\"['_main','_ags_setAntialiasedStringMode']\""
     "SHELL:-s EXTRA_EXPORTED_RUNTIME_METHODS=\"['getValue','addRunDependency','removeRunDependency']\"")
 
 else()  # NOT (ANDROID OR EMSCRIPTEN)

src/common.h

@@ -12,9 +12,10 @@
 #include <limits.h>
 #include <stdio.h>
 
-#ifdef EMSCRIPTEN
+#ifdef __EMSCRIPTEN__
 #include <emscripten.h>
-#define SDL_Delay emscripten_sleep
+#else
+#define EMSCRIPTEN_KEEPALIVE
 #endif
 
 #define FONT_RESOURCE_NAME "MTLc3m.ttf"

src/sdlmain.cpp

@@ -13,10 +13,6 @@
 #include <emscripten/html5.h>
 #endif
 
-extern "C" {
-	void ags_setAntialiasedStringMode(int on);
-}
-
 SDL_Window* g_window;
 
 int main(int argc, char *argv[])

src/sys/ags_text.cpp

@@ -543,7 +543,7 @@ uint16 AGS::convert_hankaku(uint16 code)
 
 extern "C" {
 
-void ags_setAntialiasedStringMode(int on) {
+void EMSCRIPTEN_KEEPALIVE ags_setAntialiasedStringMode(int on) {
 	antialias = on != 0;
 }
 

src/sys/nact.cpp

@@ -489,7 +489,11 @@ void NACT::wait_after_open_menu()
 void NACT::sys_sleep(int ms) {
 	pump_events();
 	ags->update_screen();
+#ifdef __EMSCRIPTEN__
+	emscripten_sleep(ms);
+#else
 	SDL_Delay(ms);
+#endif
 }
 
 // WinMainとのインターフェース

src/sys/nact.h

@@ -418,4 +418,6 @@ protected:
 	uint16 cali2() override;
 };
 
+extern "C" void ags_setAntialiasedStringMode(int on);
+
 #endif // _NACT_H_