Care package: game_change, rumble, allow extensions if needed, tidy stubs

Makefile.gmloader

@@ -64,6 +64,7 @@ JNI_OBJS:=$(patsubst %.cpp,build/%.cpp.o,$(wildcard jni/classes/*.cpp))
 JNI_OBJS+=$(patsubst %.cpp,build/%.cpp.o,$(wildcard jni/*.cpp))
 GMLOADER_OBJS:=$(patsubst %.cpp,build/%.cpp.o,$(wildcard gmloader/*.cpp))
 GMLOADER_OBJS+=$(patsubst %.cpp,build/%.cpp.o,$(wildcard gmloader/classes/*.cpp))
+GMLOADER_OBJS+=$(patsubst %.cpp,build/%.cpp.o,$(wildcard gmloader/stubs/*.cpp))
 
 GENERIC_OBJ:=\
 	${LOADER_OBJS} \

gmloader/configuration.cpp

@@ -11,6 +11,9 @@ void from_json(const json& j, gml_config& c) {
     get_if_exists("show_cursor", show_cursor);
     get_if_exists("disable_controller", disable_controller);
     get_if_exists("disable_depth", disable_depth);
+    get_if_exists("disable_extensions", disable_extensions);
+    get_if_exists("disable_rumble", disable_rumble);
+    get_if_exists("rumble_scale", rumble_scale);
     get_if_exists("disable_texhack", disable_texhack);
     get_if_exists("force_platform", force_platform);
 }
@@ -21,6 +24,9 @@ void gml_config::init_defaults(){
     show_cursor = true;
     disable_controller = false;
     disable_depth = false;
+    disable_extensions = true;
+    disable_rumble = false;
+    rumble_scale = 1.0;
     disable_texhack = true; /* Disabled by default until properly tested. */
     force_platform = "os_android";
 }
@@ -52,6 +58,9 @@ void gml_config::show_config(){
     printf("config: show_cursor = %d\n", show_cursor);
     printf("config: disable_controller = %d\n", disable_controller);
     printf("config: disable_depth = %d\n", disable_depth);
+    printf("config: disable_extensions = %d\n", disable_extensions);
+    printf("config: disable_rumble = %d\n", disable_rumble);
+    printf("config: rumble_scale = %f\n", rumble_scale);
     printf("config: disable_texhack = %d\n", disable_texhack);
     printf("config: force_platform = %s\n", force_platform.c_str());
 }

gmloader/configuration.h

@@ -13,6 +13,9 @@ struct gml_config {
     bool show_cursor;
     bool disable_controller;
     bool disable_depth;
+    bool disable_extensions;
+    bool disable_rumble;
+    float rumble_scale;
     bool disable_texhack;
     std::string force_platform;
 

gmloader/gamepad.cpp

@@ -219,6 +219,18 @@ ABI_ATTR void gamepad_button_value(RValue *ret, void *self, void *other, int arg
 
 ABI_ATTR void gamepad_set_vibration(RValue *ret, void *self, void *other, int argc, RValue *args)
 {
+    int id = YYGetInt32(args, 0);
+    double left = YYGetReal(args, 1);
+    double right = YYGetReal(args, 2);
+
+    if (!IS_CONTROLLER_BOUNDS) {
+        ret->rvalue.val = 0.0f;
+        return;
+    }
+
+    Gamepad *gamepad = &yoyo_gamepads[id];
+    gamepad->motors[0] = left;
+    gamepad->motors[1] = right;
 }
 
 ABI_ATTR void gamepad_set_axis_deadzone(RValue *ret, void *self, void *other, int argc, RValue *args)

gmloader/input.cpp

@@ -6,7 +6,6 @@
 #include "platform.h"
 #include "so_util.h"
 #include "libyoyo.h"
-#include "configuration.h"
 
 int app_in_focus = 0;
 int mouse_has_warped = 0;
@@ -302,7 +301,7 @@ int update_inputs(SDL_Window *win)
         }
     }
 
-    // Gamepad Input Code
+    // Synchronize gamepad<->yoyogamepad states
     SDL_GameControllerUpdate();
     for (int i = 0; i < ARRAY_SIZE(sdl_controllers); i++) {
         controller_t *controller = &sdl_controllers[i];
@@ -329,6 +328,34 @@ int update_inputs(SDL_Window *win)
         new_states[k++] = SDL_GameControllerGetButton(controller->controller, SDL_CONTROLLER_BUTTON_DPAD_LEFT);
         new_states[k++] = SDL_GameControllerGetButton(controller->controller, SDL_CONTROLLER_BUTTON_DPAD_RIGHT);
 
+        // Handle rumble
+        if (!gmloader_config.disable_rumble) {
+            const uint16_t MAX_RUMBLE = 0xFFFF;
+            const float MAX_RUMBLE_F = 65535.0f;
+
+            float left = yoyo_gamepads[slot].motors[0];
+            float right = yoyo_gamepads[slot].motors[1];
+
+            // Apply scale
+            if (gmloader_config.rumble_scale > 0.0f) {
+                float scale = (float)gmloader_config.rumble_scale;
+                left *= scale;
+                right *= scale;
+
+                // Clamp to [0.0, 1.0]
+                if (left > 1.0f) left = 1.0f;
+                if (left < 0.0f) left = 0.0f;
+                if (right > 1.0f) right = 1.0f;
+                if (right < 0.0f) right = 0.0f;
+            }
+
+            uint16_t left_motor = (uint16_t)(left * MAX_RUMBLE_F);
+            uint16_t right_motor = (uint16_t)(right * MAX_RUMBLE_F);
+            int duration_ms = (left_motor || right_motor) ? 10000 : 0;
+
+            SDL_GameControllerRumble(controller->controller, left_motor, right_motor, duration_ms);
+        }
+
         for (int j = 0; j < ARRAY_SIZE(yoyo_gamepads[slot].buttons); j++) {
             // down -> held or up -> cleared
             yoyo_gamepads[slot].buttons[j] = (double)update_button(new_states[j], (int)yoyo_gamepads[slot].buttons[j]);

gmloader/libyoyo.cpp

@@ -1,5 +1,8 @@
 #include <stdio.h>
 #include <stdarg.h>
+#include <string.h>
+#include <string>
+#include <stdlib.h>
 
 #include "platform.h"
 #include "so_util.h"
@@ -66,7 +69,10 @@ uint8_t prev_kbd_state[N_KEYS] = {};
 uint8_t cur_keys[N_KEYS] = {};
 
 static const char *fake_functs[] = {
+    // Other stubs
     "object_set_collisions",
+
+    // PSN Stubs
     "psn_show_error_dialog",
     "psn_check_free_space",
     "psn_get_leaderboard_score_range",
@@ -87,14 +93,6 @@ static const char *fake_functs[] = {
     "psn_name_for_user",
     "psn_default_user",
     "psn_user_for_pad",
-    "steam_utils_is_steam_running_on_steam_deck",
-    "steam_update",
-    "steam_is_screenshot_requested",
-    "steam_send_screenshot",
-    "steam_initialised",
-    "steam_stats_ready",
-    "steam_get_achievement",
-    "steam_set_achievement",
 };
 
 double FORCE_PLATFORM = os_android;
@@ -151,29 +149,80 @@ ABI_ATTR void force_platform_type_gms2(void *self, int n, RValue *args)
     args[0].rvalue.val = FORCE_PLATFORM;
 }
 
-ABI_ATTR static void steam_utils_is_steam_running_on_steam_deck(RValue *ret, void *self, void *other, int argc, RValue *args)
+ABI_ATTR static void window_handle(RValue *ret, void *self, void *other, int argc, RValue *args)
 {
-    ret->kind = VALUE_REAL;
-    ret->rvalue.val = 0;
+    warning("-- Called window_handle stub ! --\n");
+    ret->kind = VALUE_INT64;
+    ret->rvalue.v64 = 0;
 }
 
-ABI_ATTR static void steam_initialised(RValue *ret, void *self, void *other, int argc, RValue *args)
-{
-    ret->kind = VALUE_REAL;
-    ret->rvalue.val = 0;
-}
+// Implementation of game_change which is not available for android normally
+ // Takes two arguments: work_dir and launch_params (example: "/chapter1_windows" "-game data.win")
+ // https://manual.gamemaker.io/beta/en/GameMaker_Language/GML_Reference/General_Game_Control/game_change.htm
+ABI_ATTR void game_change_reimpl(RValue *ret, void *self, void *other, int argc, RValue *args) {
+    char buffer[1024];
+    int len = snprintf(buffer, sizeof(buffer), "game_change(): ");
+    for (int i = 0; i < argc && len < sizeof(buffer); i++) {
+        const char *arg = (args[i].kind == VALUE_STRING && args[i].rvalue.str && args[i].rvalue.str->m_thing)
+                          ? (char*)args[i].rvalue.str->m_thing
+                          : "INVALID";
+        len += snprintf(buffer + len, sizeof(buffer) - len, "%s%s", i > 0 ? ", " : "", arg);
+    }
+    warning("%s\n", buffer);
 
-ABI_ATTR static void steam_stats_ready(RValue *ret, void *self, void *other, int argc, RValue *args)
-{
-    ret->kind = VALUE_REAL;
-    ret->rvalue.val = 0;
+    if (ret) {
+        ret->kind = VALUE_BOOL;
+        ret->rvalue.val = 0;
+    }
+
+    if (argc < 2) {
+        warning("game_change(): Requires at least two arguments (workdir and params)\n");
+        return;
+    }
+
+    for (int i = 0; i < argc; i++) {
+        if (args[i].kind != VALUE_STRING || !args[i].rvalue.str || !args[i].rvalue.str->m_thing) {
+            warning("game_change(): Argument %d is not a valid string\n", i);
+            return;
+        }
+    }
+
+    const char *workdir = static_cast<const char*>(args[0].rvalue.str->m_thing);
+    gc_workdir = strdup(workdir);
+    if (!gc_workdir) {
+        warning("game_change(): Failed to duplicate workdir\n");
+        return;
+    }
+
+    std::string sub_path = gc_workdir;
+    if (!sub_path.empty() && sub_path.back() != '/') {
+        sub_path += '/';
+    }
+
+    std::string full_path = gmloader_config.save_dir + sub_path;
+    warning("game_change(): Resolved game path: '%s'\n", full_path.c_str());
+
+    relaunch_flag = 1;
+
+    if (ret) {
+        ret->kind = VALUE_BOOL;
+        ret->rvalue.val = 1;
+    }
 }
 
-ABI_ATTR static void window_handle(RValue *ret, void *self, void *other, int argc, RValue *args)
+ABI_ATTR static void video_open_reimpl(RValue *ret, void *self, void *other, int argc, RValue *args)
 {
-    warning("-- Called window_handle stub ! --\n");
-    ret->kind = VALUE_INT64;
-    ret->rvalue.v64 = 0;
+    ret->kind = VALUE_BOOL;
+    ret->rvalue.val = 1;
+
+    if (CreateAsynEventWithDSMap != NULL && CreateDsMap != NULL && dsMapAddString != NULL) {
+        int ds_map = CreateDsMap(0);
+        dsMapAddString(ds_map, "type", "video_end");
+        if (argc > 0 && args[0].kind == VALUE_STRING && args[0].rvalue.str && args[0].rvalue.str->m_thing) {
+            dsMapAddString(ds_map, "path", static_cast<const char*>(args[0].rvalue.str->m_thing));
+        }
+        CreateAsynEventWithDSMap(ds_map, 70);
+    }
 }
 
 void patch_libyoyo(so_module *mod)
@@ -235,10 +284,12 @@ void patch_libyoyo(so_module *mod)
     FIND_SYMBOL(mod, surface_depth_disable, "_Z21F_SurfaceDepthDisableR6RValueP9CInstanceS2_iPS_");
 
     // Disable extension support
-    FIND_SYMBOL(mod, Extension_Main_number, "Extension_Main_number");
-    //hook_symbol(mod, "_Z20Extension_Initializev", (uintptr_t)&dont_init_extensions, 1);
-    hook_symbol(mod, "_Z20Extension_PrePreparev", (uintptr_t)&dont_init_extensions, 1);
-    hook_symbol(mod, "_Z14Extension_LoadPhjS_", (uintptr_t)&dont_init_extensions, 1);
+    if (gmloader_config.disable_extensions == 1) {
+        FIND_SYMBOL(mod, Extension_Main_number, "Extension_Main_number");
+        //hook_symbol(mod, "_Z20Extension_Initializev", (uintptr_t)&dont_init_extensions, 1);
+        hook_symbol(mod, "_Z20Extension_PrePreparev", (uintptr_t)&dont_init_extensions, 1);
+        hook_symbol(mod, "_Z14Extension_LoadPhjS_", (uintptr_t)&dont_init_extensions, 1);
+    }
 
     // Hook messages for debug
     hook_symbol(mod, "_Z11ShowMessagePKc", (uintptr_t)&show_message, 1);
@@ -276,6 +327,8 @@ void patch_libyoyo(so_module *mod)
     }
 
     Function_Add("window_handle", window_handle, 0, 1);
+    Function_Add("game_change", game_change_reimpl, 2, 0);
+    Function_Add("video_open", video_open_reimpl, 1, 1);
 
     so_symbol_fix_ldmia(mod, "_Z11Shader_LoadPhjS_");
 }

gmloader/libyoyo.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#include "configuration.h"
+
 #define MASK_KIND_RVALUE 0x0ffffff
 typedef enum RValueType {
 	VALUE_REAL = 0,
@@ -63,9 +65,10 @@ typedef struct Gamepad {
 	double buttons[16];
 	double deadzone;
 	double axis[4];
+	double motors[1];
 
 	Gamepad()
-	: is_available(0), was_available(0), buttons{0}, deadzone(0.1), axis{0}
+	: is_available(0), was_available(0), buttons{0}, deadzone(0.1), axis{0}, motors{0}
 	{ /* ... */ }
 } Gamepad;
 
@@ -278,12 +281,17 @@ extern void **g_pGameFileBuffer;
 extern void **g_ppYYStackTrace;
 extern int *Extension_Main_number;
 
+extern const char *gc_workdir;
+extern int relaunch_flag;
+
 extern void patch_libyoyo(struct so_module *mod);
 extern void patch_input(struct so_module *mod);
 extern void patch_gamepad(struct so_module *mod);
 extern void patch_mouse(struct so_module *mod);
 extern void patch_fmod(struct so_module *mod);
 extern void patch_gameframe(struct so_module *mod);
+extern void patch_steam(struct so_module *mod);
 extern void patch_texture(struct so_module *mod);
 extern int update_inputs(struct SDL_Window *sdl_win);
+
 void disable_depth();