fix: el fade en el titol al anar a jugar es podia interrumpir continuament

source/input.cpp

@@ -4,6 +4,40 @@
 
 #include <iostream>  // for basic_ostream, operator<<, cout, basi...
 
+// Emscripten-only: SDL 3.4+ ja no casa el GUID dels mandos de Chrome Android
+// amb gamecontrollerdb (el gamepad.id d'Android no porta Vendor/Product, el
+// parser extreu valors escombraries, el GUID resultant no està a la db i el
+// gamepad queda obert amb un mapping incorrecte). Com el W3C Gamepad API
+// garanteix el layout estàndard quan el navegador reporta mapping=="standard",
+// injectem un mapping SDL amb eixe layout per al GUID del joystick abans
+// d'obrir-lo com gamepad. Fora d'Emscripten és un no-op.
+static void installWebStandardMapping(SDL_JoystickID jid) {
+#ifdef __EMSCRIPTEN__
+    SDL_GUID guid = SDL_GetJoystickGUIDForID(jid);
+    char guidStr[33];
+    SDL_GUIDToString(guid, guidStr, sizeof(guidStr));
+    const char *name = SDL_GetJoystickNameForID(jid);
+    if (!name || !*name) name = "Standard Gamepad";
+
+    char mapping[512];
+    SDL_snprintf(mapping, sizeof(mapping),
+                 "%s,%s,"
+                 "a:b0,b:b1,x:b2,y:b3,"
+                 "leftshoulder:b4,rightshoulder:b5,"
+                 "lefttrigger:b6,righttrigger:b7,"
+                 "back:b8,start:b9,"
+                 "leftstick:b10,rightstick:b11,"
+                 "dpup:b12,dpdown:b13,dpleft:b14,dpright:b15,"
+                 "guide:b16,"
+                 "leftx:a0,lefty:a1,rightx:a2,righty:a3,"
+                 "platform:Emscripten",
+                 guidStr, name);
+    SDL_AddGamepadMapping(mapping);
+#else
+    (void)jid;
+#endif
+}
+
 // Constructor
 Input::Input(std::string file) {
     // Fichero gamecontrollerdb.txt
@@ -224,6 +258,7 @@ bool Input::discoverGameController() {
             for (int i = 0; i < nJoysticks; i++) {
                 if (!SDL_IsGamepad(joysticks[i])) continue;
 
+                installWebStandardMapping(joysticks[i]);
                 SDL_Gamepad *pad = SDL_OpenGamepad(joysticks[i]);
                 if (pad != nullptr) {
                     const std::string name = buildControllerName(pad, padIndex);
@@ -264,6 +299,7 @@ bool Input::handleGamepadAdded(SDL_JoystickID jid, std::string &outName) {
         }
     }
 
+    installWebStandardMapping(jid);
     SDL_Gamepad *pad = SDL_OpenGamepad(jid);
     if (pad == nullptr) {
         if (verbose) {