emscripten fixes.

--HG--
branch : dev

premake4.lua

@@ -442,7 +442,7 @@ function build_link_configuration( package_name, use_ee_icon )
 	
 	configuration "emscripten"
 		linkoptions{ "-O1 -s TOTAL_MEMORY=67108864 -s ASM_JS=1 -s VERBOSE=1 -s DISABLE_EXCEPTION_CATCHING=0 -s USE_SDL=2" }
-		buildoptions { "-fno-strict-aliasing -O2 -ffast-math" }
+		buildoptions { "-fno-strict-aliasing -O2 -ffast-math -s USE_SDL=2" }
 
 		if _OPTIONS["with-gles1"] and ( not _OPTIONS["with-gles2"] or _OPTIONS["force-gles1"] ) then
 			linkoptions{ "-s LEGACY_GL_EMULATION=1" }

src/eepp/window/backend/SDL2/inputsdl2.cpp

@@ -13,7 +13,8 @@ static Uint32	KeyCodesTable[ SDL_NUM_SCANCODES ];
 static bool		KeyCodesTableInit = false;
 
 InputSDL::InputSDL( EE::Window::Window * window ) :
-	Input( window, eeNew( JoystickManagerSDL, () ) )
+	Input( window, eeNew( JoystickManagerSDL, () ) ),
+	mDPIScale(1.f)
 {
 	#if defined( EE_X11_PLATFORM )
 	mMouseSpeed = 1.75f;

src/eepp/window/backend/SDL2/windowsdl2.cpp

@@ -130,9 +130,11 @@ bool WindowSDL::create( WindowSettings Settings, ContextSettings Context ) {
 
 	mWindow.Flags = SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN;
 
+	#if EE_PLATFORM != EE_PLATFORM_EMSCRIPTEN
 	#if SDL_VERSION_ATLEAST(2,0,1)
 	mWindow.Flags |= SDL_WINDOW_ALLOW_HIGHDPI;
 	#endif
+	#endif
 
 	if ( mWindow.WindowConfig.Style & WindowStyle::Resize ) {
 		mWindow.Flags |= SDL_WINDOW_RESIZABLE;