79 lines
2.9 KiB
C
79 lines
2.9 KiB
C
#include "game-mode-internal.h"
|
|
#include <mods/init/init.h>
|
|
#include <mods/feature/feature.h>
|
|
|
|
#include <libreborn/libreborn.h>
|
|
#include <symbols/minecraft.h>
|
|
|
|
static int is_survival = -1;
|
|
|
|
// Patch Game Mode
|
|
static void set_is_survival(int new_is_survival) {
|
|
if (is_survival != new_is_survival) {
|
|
INFO("Setting Game Mode: %s", new_is_survival ? "Survival" : "Creative");
|
|
|
|
// Correct Inventpry UI
|
|
unsigned char inventory_patch[4] = {new_is_survival ? 0x00 : 0x01, 0x30, 0xa0, 0xe3}; // "mov r3, #0x0" or "mov r3, #0x1"
|
|
patch((void *) 0x16efc, inventory_patch);
|
|
|
|
// Use Correct Size For GameMode Object
|
|
unsigned char size_patch[4] = {new_is_survival ? SURVIVAL_MODE_SIZE : CREATOR_MODE_SIZE, 0x00, 0xa0, 0xe3}; // "mov r0, #SURVIVAL_MODE_SIZE" or "mov r0, #CREATOR_MODE_SIZE"
|
|
patch((void *) 0x16ee4, size_patch);
|
|
|
|
// Replace Default CreatorMode Constructor With CreatorMode Or SurvivalMode Constructor
|
|
overwrite_call((void *) 0x16ef4, new_is_survival ? SurvivalMode : CreatorMode);
|
|
|
|
is_survival = new_is_survival;
|
|
}
|
|
}
|
|
|
|
// Handle Gamemode Switching
|
|
static void Minecraft_setIsCreativeMode_injection(unsigned char *this, int32_t new_game_mode) {
|
|
set_is_survival(!new_game_mode);
|
|
|
|
// Call Original Method
|
|
(*Minecraft_setIsCreativeMode)(this, new_game_mode);
|
|
}
|
|
|
|
// Disable CreatorMode-Specific API Features (Polling Block Hits) In SurvivalMode, This Is Preferable To Crashing
|
|
static unsigned char *Minecraft_getCreator_injection(unsigned char *minecraft) {
|
|
if (is_survival) {
|
|
// SurvivalMode, Return NULL
|
|
return NULL;
|
|
} else {
|
|
// CreatorMode, Call Original Method
|
|
return (*Minecraft_getCreator)(minecraft);
|
|
}
|
|
}
|
|
|
|
// Init
|
|
void init_game_mode() {
|
|
// Dynamic Game Mode Switching
|
|
if (feature_has("Implement Game-Mode Switching", server_enabled)) {
|
|
set_is_survival(1);
|
|
overwrite_calls((void *) Minecraft_setIsCreativeMode, (void *) Minecraft_setIsCreativeMode_injection);
|
|
|
|
// Replace CreatorLevel With ServerLevel (This Fixes Beds And Mob Spawning)
|
|
overwrite_call((void *) 0x16f84, (void *) ServerLevel);
|
|
|
|
// Allocate Correct Size For ServerLevel
|
|
uint32_t level_size = SERVER_LEVEL_SIZE;
|
|
patch_address((void *) 0x17004, (void *) level_size);
|
|
|
|
// Disable CreatorMode-Specific API Features (Polling Block Hits) In SurvivalMode, This Is Preferable To Crashing
|
|
overwrite_calls((void *) Minecraft_getCreator, (void *) Minecraft_getCreator_injection);
|
|
}
|
|
|
|
// Create World Dialog
|
|
if (feature_has("Implement Create World Dialog", server_disabled)) {
|
|
// Init UI
|
|
_init_game_mode_ui();
|
|
}
|
|
|
|
// Allow Joining Survival Servers
|
|
if (feature_has("Allow Joining Survival Servers", server_enabled)) {
|
|
unsigned char server_patch[4] = {0x0f, 0x00, 0x00, 0xea}; // "b 0x6dcb4"
|
|
patch((void *) 0x6dc70, server_patch);
|
|
}
|
|
}
|