TRX/src/main.c

#include <windows.h>
#include <stdio.h>

#include "json_utils.h"
#include "struct.h"
#include "util.h"
#include "func.h"
#include "mod.h"

HINSTANCE hInstance = NULL;

static void tr1m_inject() {
    INJECT(0x0041AF90, S_LoadLevel);
    INJECT(0x0041B3F0, LoadRooms);
    INJECT(0x0041BC60, LoadItems);
    INJECT(0x0041BFC0, GetFullPath);
    INJECT(0x0041C020, FindCdDrive);
    INJECT(0x0041D5A0, LevelStats);
    INJECT(0x0041DD00, DrawGameInfo);
    INJECT(0x0041E2C0, init_game_malloc);
    INJECT(0x0041E3B0, game_free);
    INJECT(0x00422250, InitialiseFXArray);
    INJECT(0x00428020, InitialiseLara);
    INJECT(0x0042A2C0, DB_Log);
    INJECT(0x0042A300, InitialiseLOTArray);
    INJECT(0x004302D0, S_DrawHealthBar);
    INJECT(0x00430450, S_DrawAirBar);
}

static int tr1m_read_config() {
    FILE *fp = fopen("TR1Main.json", "rb");
    if (!fp) {
        return 0;
    }

    fseek(fp, 0, SEEK_END);
    int cfg_size = ftell(fp);
    fseek(fp, 0, SEEK_SET);

    char *cfg_data = malloc(cfg_size);
    if (!cfg_data) {
        fclose(fp);
        return 0;
    }
    fread(cfg_data, 1, cfg_size, fp);
    fclose(fp);

    json_value *json = json_parse((const json_char*)cfg_data, cfg_size);

    TR1MConfig.disable_healing_between_levels = tr1m_json_get_boolean_value(
        json, "disable_healing_between_levels"
    );
    TR1MConfig.disable_medpacks = tr1m_json_get_boolean_value(
        json, "disable_medpacks"
    );
    TR1MConfig.fix_end_of_level_freeze = tr1m_json_get_boolean_value(
        json, "fix_end_of_level_freeze"
    );

    json_value_free(json);
    free(cfg_data);
    return 1;
}

BOOL APIENTRY DllMain(
    HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved
) {
    switch (fdwReason) {
        case DLL_PROCESS_ATTACH:
            freopen("./TR1Main.log", "w", stdout);
            tr1m_read_config();
            TRACE("Attached");
            hInstance = hinstDLL;
            tr1m_inject();
            break;

        case DLL_PROCESS_DETACH:
            TRACE("Detached");
            break;

        case DLL_THREAD_ATTACH:
            break;

        case DLL_THREAD_DETACH:
            break;
    }

    return TRUE;
}