mirror of https://github.com/OpenRCT2/OpenRCT2.git
577 lines
18 KiB
C
577 lines
18 KiB
C
/*****************************************************************************
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* Copyright (c) 2014 Ted John
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* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
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*
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* This file is part of OpenRCT2.
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*
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* OpenRCT2 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*****************************************************************************/
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#include "addresses.h"
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#include "audio/audio.h"
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#include "audio/mixer.h"
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#include "cmdline.h"
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#include "config.h"
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#include "editor.h"
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#include "game.h"
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#include "hook.h"
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#include "interface/chat.h"
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#include "interface/window.h"
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#include "interface/viewport.h"
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#include "localisation/localisation.h"
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#include "network/http.h"
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#include "network/network.h"
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#include "openrct2.h"
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#include "platform/platform.h"
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#include "ride/ride.h"
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#include "title.h"
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#include "util/sawyercoding.h"
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#include "util/util.h"
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#include "world/mapgen.h"
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#ifdef __linux__
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#include <sys/mman.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#endif // __linux__
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int gOpenRCT2StartupAction = STARTUP_ACTION_TITLE;
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utf8 gOpenRCT2StartupActionPath[512] = { 0 };
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utf8 gExePath[MAX_PATH];
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// This should probably be changed later and allow a custom selection of things to initialise like SDL_INIT
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bool gOpenRCT2Headless = false;
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bool gOpenRCT2ShowChangelog;
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/** If set, will end the OpenRCT2 game loop. Intentially private to this module so that the flag can not be set back to 0. */
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int _finished;
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// Used for object movement tweening
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static struct { sint16 x, y, z; } _spritelocations1[MAX_SPRITES], _spritelocations2[MAX_SPRITES];
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static void openrct2_loop();
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static bool openrct2_setup_rct2_segment();
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static void openrct2_setup_rct2_hooks();
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static void openrct2_copy_files_over(const utf8 *originalDirectory, const utf8 *newDirectory, const utf8 *extension)
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{
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utf8 *ch, filter[MAX_PATH], oldPath[MAX_PATH], newPath[MAX_PATH];
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int fileEnumHandle;
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file_info fileInfo;
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if (!platform_ensure_directory_exists(newDirectory)) {
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log_error("Could not create directory %s.", newDirectory);
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return;
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}
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// Create filter path
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strcpy(filter, originalDirectory);
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ch = strchr(filter, '*');
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if (ch != NULL)
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*ch = 0;
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strcat(filter, "*");
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strcat(filter, extension);
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fileEnumHandle = platform_enumerate_files_begin(filter);
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while (platform_enumerate_files_next(fileEnumHandle, &fileInfo)) {
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strcpy(newPath, newDirectory);
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strcat(newPath, fileInfo.path);
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strcpy(oldPath, originalDirectory);
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ch = strchr(oldPath, '*');
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if (ch != NULL)
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*ch = 0;
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strcat(oldPath, fileInfo.path);
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if (!platform_file_exists(newPath))
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platform_file_copy(oldPath, newPath, false);
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}
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platform_enumerate_files_end(fileEnumHandle);
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fileEnumHandle = platform_enumerate_directories_begin(originalDirectory);
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while (platform_enumerate_directories_next(fileEnumHandle, filter)) {
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strcpy(newPath, newDirectory);
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strcat(newPath, filter);
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strcpy(oldPath, originalDirectory);
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ch = strchr(oldPath, '*');
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if (ch != NULL)
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*ch = 0;
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strcat(oldPath, filter);
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if (!platform_ensure_directory_exists(newPath)) {
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log_error("Could not create directory %s.", newPath);
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return;
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}
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openrct2_copy_files_over(oldPath, newPath, extension);
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}
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platform_enumerate_directories_end(fileEnumHandle);
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}
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// TODO move to platform
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static void openrct2_set_exe_path()
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{
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#ifdef _WIN32
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wchar_t exePath[MAX_PATH];
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wchar_t tempPath[MAX_PATH];
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wchar_t *exeDelimiter;
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int exeDelimiterIndex;
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GetModuleFileNameW(NULL, exePath, MAX_PATH);
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exeDelimiter = wcsrchr(exePath, platform_get_path_separator());
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exeDelimiterIndex = (int)(exeDelimiter - exePath);
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lstrcpynW(tempPath, exePath, exeDelimiterIndex + 1);
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tempPath[exeDelimiterIndex] = L'\0';
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_wfullpath(exePath, tempPath, MAX_PATH);
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WideCharToMultiByte(CP_UTF8, 0, exePath, countof(exePath), gExePath, countof(gExePath), NULL, NULL);
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#else
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char exePath[MAX_PATH];
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ssize_t bytesRead;
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bytesRead = readlink("/proc/self/exe", exePath, MAX_PATH);
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if (bytesRead == -1) {
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log_fatal("failed to read /proc/self/exe");
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}
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exePath[bytesRead] = '\0';
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log_verbose("######################################## Setting exe path to %s", exePath);
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char *exeDelimiter = strrchr(exePath, platform_get_path_separator());
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if (exeDelimiter == NULL)
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{
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log_error("should never happen here");
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gExePath[0] = '\0';
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return;
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}
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int exeDelimiterIndex = (int)(exeDelimiter - exePath);
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strncpy(gExePath, exePath, exeDelimiterIndex + 1);
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gExePath[exeDelimiterIndex] = '\0';
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#endif // _WIN32
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}
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/**
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* Copy saved games and landscapes to user directory
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*/
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static void openrct2_copy_original_user_files_over()
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{
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utf8 path[MAX_PATH];
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platform_get_user_directory(path, "save");
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openrct2_copy_files_over((utf8*)RCT2_ADDRESS_SAVED_GAMES_PATH, path, ".sv6");
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platform_get_user_directory(path, "landscape");
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openrct2_copy_files_over((utf8*)RCT2_ADDRESS_LANDSCAPES_PATH, path, ".sc6");
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}
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bool openrct2_initialise()
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{
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utf8 userPath[MAX_PATH];
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platform_get_user_directory(userPath, NULL);
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if (!platform_ensure_directory_exists(userPath)) {
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log_fatal("Could not create user directory (do you have write access to your documents folder?)");
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return false;
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}
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if (!openrct2_setup_rct2_segment()) {
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log_fatal("Unable to load RCT2 data sector");
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return false;
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}
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openrct2_set_exe_path();
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config_set_defaults();
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if (!config_open_default()) {
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if (!config_find_or_browse_install_directory()) {
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log_fatal("An RCT2 install directory must be specified!");
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return false;
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}
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}
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gOpenRCT2ShowChangelog = true;
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if (gConfigGeneral.last_run_version != NULL && (strcmp(gConfigGeneral.last_run_version, OPENRCT2_VERSION) == 0))
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gOpenRCT2ShowChangelog = false;
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gConfigGeneral.last_run_version = OPENRCT2_VERSION;
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config_save_default();
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// TODO add configuration option to allow multiple instances
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// if (!gOpenRCT2Headless && !platform_lock_single_instance()) {
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// log_fatal("OpenRCT2 is already running.");
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// return false;
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// }
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get_system_info();
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if (!gOpenRCT2Headless) {
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audio_init();
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audio_get_devices();
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}
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language_open(gConfigGeneral.language);
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http_init();
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themes_set_default();
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themes_load_presets();
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title_sequences_set_default();
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title_sequences_load_presets();
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openrct2_setup_rct2_hooks();
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if (!rct2_init())
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return false;
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chat_init();
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openrct2_copy_original_user_files_over();
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// TODO move to audio initialise function
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if (str_is_null_or_empty(gConfigSound.device)) {
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Mixer_Init(NULL);
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RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_SOUND_DEVICE, uint32) = 0;
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} else {
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Mixer_Init(gConfigSound.device);
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for (int i = 0; i < gAudioDeviceCount; i++) {
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if (strcmp(gAudioDevices[i].name, gConfigSound.device) == 0) {
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RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_SOUND_DEVICE, uint32) = i;
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}
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}
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}
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return true;
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}
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/**
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* Launches the game, after command line arguments have been parsed and processed.
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*/
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void openrct2_launch()
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{
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if (openrct2_initialise()) {
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RCT2_GLOBAL(RCT2_ADDRESS_RUN_INTRO_TICK_PART, uint8) = 0;
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if((gOpenRCT2StartupAction == STARTUP_ACTION_TITLE) && gConfigGeneral.play_intro)
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gOpenRCT2StartupAction = STARTUP_ACTION_INTRO;
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switch (gOpenRCT2StartupAction) {
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case STARTUP_ACTION_INTRO:
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RCT2_GLOBAL(RCT2_ADDRESS_RUN_INTRO_TICK_PART, uint8) = 1;
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break;
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case STARTUP_ACTION_TITLE:
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RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_TITLE_DEMO;
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break;
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case STARTUP_ACTION_OPEN:
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assert(gOpenRCT2StartupActionPath != NULL);
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rct2_open_file(gOpenRCT2StartupActionPath);
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RCT2_GLOBAL(RCT2_ADDRESS_SCREEN_FLAGS, uint8) = SCREEN_FLAGS_PLAYING;
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#ifndef DISABLE_NETWORK
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if (gNetworkStart == NETWORK_MODE_SERVER) {
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network_begin_server(gNetworkStartPort);
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}
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#endif // DISABLE_NETWORK
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break;
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case STARTUP_ACTION_EDIT:
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if (strlen(gOpenRCT2StartupActionPath) == 0) {
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editor_load();
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} else {
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editor_load_landscape(gOpenRCT2StartupActionPath);
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}
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break;
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}
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#ifndef DISABLE_NETWORK
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if (gNetworkStart == NETWORK_MODE_CLIENT) {
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network_begin_client(gNetworkStartHost, gNetworkStartPort);
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}
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#endif // DISABLE_NETWORK
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openrct2_loop();
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}
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openrct2_dispose();
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// HACK Some threads are still running which causes the game to not terminate. Investigation required!
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exit(gExitCode);
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}
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void openrct2_dispose()
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{
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network_close();
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http_dispose();
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language_close_all();
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platform_free();
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}
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/**
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* Determines whether its worth tweening a sprite or not when frame smoothing is on.
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*/
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static bool sprite_should_tween(rct_sprite *sprite)
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{
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if (sprite->unknown.linked_list_type_offset == SPRITE_LINKEDLIST_OFFSET_VEHICLE)
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return true;
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if (sprite->unknown.linked_list_type_offset == SPRITE_LINKEDLIST_OFFSET_PEEP)
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return true;
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if (sprite->unknown.linked_list_type_offset == SPRITE_LINKEDLIST_OFFSET_UNKNOWN)
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return true;
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return false;
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}
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/**
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* Run the main game loop until the finished flag is set at 40fps (25ms interval).
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*/
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static void openrct2_loop()
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{
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uint32 currentTick, ticksElapsed, lastTick = 0;
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static uint32 uncapTick = 0;
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static int fps = 0;
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static uint32 secondTick = 0;
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log_verbose("begin openrct2 loop");
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_finished = 0;
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do {
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if (gConfigGeneral.uncap_fps && gGameSpeed <= 4) {
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currentTick = SDL_GetTicks();
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if (uncapTick == 0) {
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// Reset sprite locations
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uncapTick = SDL_GetTicks();
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openrct2_reset_object_tween_locations();
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}
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// Limit number of updates per loop (any long pauses or debugging can make this update for a very long time)
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if (currentTick - uncapTick > 25 * 60) {
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uncapTick = currentTick - 25 - 1;
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}
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platform_process_messages();
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while (uncapTick <= currentTick && currentTick - uncapTick > 25) {
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// Get the original position of each sprite
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for (uint16 i = 0; i < MAX_SPRITES; i++) {
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_spritelocations1[i].x = g_sprite_list[i].unknown.x;
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_spritelocations1[i].y = g_sprite_list[i].unknown.y;
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_spritelocations1[i].z = g_sprite_list[i].unknown.z;
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}
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// Update the game so the sprite positions update
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rct2_update();
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// Get the next position of each sprite
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for (uint16 i = 0; i < MAX_SPRITES; i++) {
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_spritelocations2[i].x = g_sprite_list[i].unknown.x;
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_spritelocations2[i].y = g_sprite_list[i].unknown.y;
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_spritelocations2[i].z = g_sprite_list[i].unknown.z;
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}
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uncapTick += 25;
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}
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// Tween the position of each sprite from the last position to the new position based on the time between the last
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// tick and the next tick.
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float nudge = 1 - ((float)(currentTick - uncapTick) / 25);
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for (uint16 i = 0; i < MAX_SPRITES; i++) {
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if (!sprite_should_tween(&g_sprite_list[i]))
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continue;
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sprite_move(
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_spritelocations2[i].x + (sint16)((_spritelocations1[i].x - _spritelocations2[i].x) * nudge),
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_spritelocations2[i].y + (sint16)((_spritelocations1[i].y - _spritelocations2[i].y) * nudge),
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_spritelocations2[i].z + (sint16)((_spritelocations1[i].z - _spritelocations2[i].z) * nudge),
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&g_sprite_list[i]
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);
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invalidate_sprite_2(&g_sprite_list[i]);
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}
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if ((SDL_GetWindowFlags(gWindow) & (SDL_WINDOW_MINIMIZED | SDL_WINDOW_HIDDEN)) == 0) {
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rct2_draw();
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platform_draw();
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}
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fps++;
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if (SDL_GetTicks() - secondTick >= 1000) {
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fps = 0;
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secondTick = SDL_GetTicks();
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}
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// Restore the real positions of the sprites so they aren't left at the mid-tween positions
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for (uint16 i = 0; i < MAX_SPRITES; i++) {
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if (!sprite_should_tween(&g_sprite_list[i]))
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continue;
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invalidate_sprite_2(&g_sprite_list[i]);
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sprite_move(_spritelocations2[i].x, _spritelocations2[i].y, _spritelocations2[i].z, &g_sprite_list[i]);
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}
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network_update();
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} else {
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uncapTick = 0;
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currentTick = SDL_GetTicks();
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ticksElapsed = currentTick - lastTick;
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if (ticksElapsed < 25) {
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if (ticksElapsed < 15)
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SDL_Delay(15 - ticksElapsed);
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continue;
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}
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lastTick = currentTick;
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platform_process_messages();
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rct2_update();
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if ((SDL_GetWindowFlags(gWindow) & (SDL_WINDOW_MINIMIZED | SDL_WINDOW_HIDDEN)) == 0) {
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rct2_draw();
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platform_draw();
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}
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}
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} while (!_finished);
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}
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/**
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* Causes the OpenRCT2 game loop to finish.
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*/
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void openrct2_finish()
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{
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_finished = 1;
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}
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void openrct2_reset_object_tween_locations()
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{
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for (uint16 i = 0; i < MAX_SPRITES; i++) {
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_spritelocations1[i].x = _spritelocations2[i].x = g_sprite_list[i].unknown.x;
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_spritelocations1[i].y = _spritelocations2[i].y = g_sprite_list[i].unknown.y;
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_spritelocations1[i].z = _spritelocations2[i].z = g_sprite_list[i].unknown.z;
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}
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}
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/**
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* Loads RCT2's data model and remaps the addresses.
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* @returns true if the data integrity check succeeded, otherwise false.
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*/
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static bool openrct2_setup_rct2_segment()
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{
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// Linux will run OpenRCT2 as a native application and then load in the Windows PE, mapping the appropriate addresses as
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// necessary. Windows does not need to do this as OpenRCT2 runs as a DLL loaded from the Windows PE.
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#ifdef __linux__
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#define DATA_OFFSET 0x004A4000
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const char *exepath = "openrct2.exe";
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int fd = open(exepath, O_RDONLY);
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if (fd < 0) {
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log_fatal("failed to open %s, errno = %d", exepath, errno);
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exit(1);
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}
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// Using PE-bear I was able to figure out all the needed addresses to be filled.
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// There are three sections to be loaded: .rdata, .data and .text, plus another
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// one to be mapped: DATASEG.
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// Out of the three, two can simply be mmapped into memory, while the third one,
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// .data has a virtual size which is much completely different to its file size
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// (even when taking page-alignment into consideration)
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//
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// The sections are as follows (dump from gdb)
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// [0] 0x401000->0x6f7000 at 0x00001000: .text ALLOC LOAD READONLY CODE HAS_CONTENTS
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// [1] 0x6f7000->0x8a325d at 0x002f7000: CODESEG ALLOC LOAD READONLY CODE HAS_CONTENTS
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// [2] 0x8a4000->0x9a5894 at 0x004a4000: .rdata ALLOC LOAD DATA HAS_CONTENTS
|
|
// [3] 0x9a6000->0x9e2000 at 0x005a6000: .data ALLOC LOAD DATA HAS_CONTENTS
|
|
// [4] 0x1428000->0x14282bc at 0x005e2000: DATASEG ALLOC LOAD DATA HAS_CONTENTS
|
|
// [5] 0x1429000->0x1452000 at 0x005e3000: .cms_t ALLOC LOAD READONLY CODE HAS_CONTENTS
|
|
// [6] 0x1452000->0x14aaf3e at 0x0060c000: .cms_d ALLOC LOAD DATA HAS_CONTENTS
|
|
// [7] 0x14ab000->0x14ac58a at 0x00665000: .idata ALLOC LOAD READONLY DATA HAS_CONTENTS
|
|
// [8] 0x14ad000->0x14b512f at 0x00667000: .rsrc ALLOC LOAD DATA HAS_CONTENTS
|
|
//
|
|
// .data section, however, has virtual size of 0xA81C3C, and so
|
|
// 0x9a6000 + 0xA81C3C = 0x1427C3C, which after alignment to page size becomes
|
|
// 0x1428000, which can be seen as next section, DATASEG
|
|
//
|
|
// Since mmap does not provide a way to create a mapping with virtual size,
|
|
// I resorted to creating a one large map for data and memcpy'ing data where
|
|
// required.
|
|
// Another section is needed for .text, as it requires PROT_EXEC flag.
|
|
|
|
// TODO: UGLY, UGLY HACK!
|
|
off_t file_size = 6750208;
|
|
|
|
int len = 0x01429000 - 0x8a4000; // 0xB85000, 12079104 bytes or around 11.5MB
|
|
// section: rw data
|
|
void *base = mmap((void *)0x8a4000, len, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_SHARED, 0, 0);
|
|
log_warning("base = %x, 0x01423b40 >= base == %i, 0x01423b40 < base + len == %i", base, (void *)0x01423b40 >= base, (void *)0x01423b40 < base + len);
|
|
if (base == MAP_FAILED) {
|
|
log_warning("errno = %i", errno);
|
|
exit(1);
|
|
}
|
|
|
|
len = 0x004A3000;
|
|
// section: text
|
|
void *base2 = mmap((void *)(0x401000), len, PROT_EXEC | PROT_WRITE | PROT_READ, MAP_PRIVATE, fd, 0x1000);
|
|
if (base2 != (void *)(0x401000))
|
|
{
|
|
log_fatal("mmap failed to get required offset! got %p, expected %p, errno = %d", base2, (void *)(0x401000), errno);
|
|
exit(1);
|
|
}
|
|
|
|
void *fbase = mmap(NULL, file_size, PROT_READ, MAP_PRIVATE, fd, 0);
|
|
int err = errno;
|
|
log_warning("mmapped file to %p", fbase);
|
|
if (fbase == MAP_FAILED)
|
|
{
|
|
log_fatal("mmap failed to get required offset! got %p, errno = %d", fbase, err);
|
|
exit(1);
|
|
}
|
|
// .rdata and real part of .data
|
|
// 0x9e2000 - 0x8a4000 = 0x13e000
|
|
memcpy(base, fbase + DATA_OFFSET, 0x13e000);
|
|
#endif // __linux__
|
|
|
|
// Check that the expected data is at various addresses.
|
|
const uint32 c1 = sawyercoding_calculate_checksum((void *)0x009ACFA4, 128);
|
|
const uint32 c2 = sawyercoding_calculate_checksum((void *)0x009ACFA4, 720 * 4);
|
|
const uint32 exp_c1 = 32640;
|
|
const uint32 exp_c2 = 734400;
|
|
if (c1 != exp_c1 || c2 != exp_c2) {
|
|
log_warning("c1 = %u, expected %u, match %d", c1, exp_c1, c1 == exp_c1);
|
|
log_warning("c1 = %u, expected %u, match %d", c2, exp_c2, c2 == exp_c2);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Setup hooks to allow RCT2 to call OpenRCT2 functions instead.
|
|
*/
|
|
static void openrct2_setup_rct2_hooks()
|
|
{
|
|
addhook(0x006E732D, (int)gfx_set_dirty_blocks, 0, (int[]){ EAX, EBX, EDX, EBP, END }, 0, 0); // remove when all callers are decompiled
|
|
addhook(0x006E7499, (int)gfx_redraw_screen_rect, 0, (int[]){ EAX, EBX, EDX, EBP, END }, 0, 0); // remove when 0x6E7FF3 is decompiled
|
|
addhook(0x006B752C, (int)ride_crash, 0, (int[]){ EDX, EBX, END }, 0, 0); // remove when all callers are decompiled
|
|
addhook(0x0069A42F, (int)peep_window_state_update, 0, (int[]){ ESI, END }, 0, 0); // remove when all callers are decompiled
|
|
addhook(0x006BB76E, (int)sound_play_panned, 0, (int[]){EAX, EBX, ECX, EDX, EBP, END}, EAX, 0); // remove when all callers are decompiled
|
|
addhook(0x006C42D9, (int)scrolling_text_setup, 0, (int[]){EAX, ECX, EBP, END}, 0, EBX); // remove when all callers are decompiled
|
|
addhook(0x006C2321, (int)gfx_get_string_width, 0, (int[]){ESI, END}, 0, ECX); // remove when all callers are decompiled
|
|
addhook(0x006C2555, (int)format_string, 0, (int[]){EDI, EAX, ECX, END}, 0, 0); // remove when all callers are decompiled
|
|
}
|
|
|
|
#if _MSC_VER >= 1900
|
|
/**
|
|
* Temporary fix for libraries not compiled with VS2015
|
|
*/
|
|
FILE **__iob_func()
|
|
{
|
|
static FILE* streams[3];
|
|
streams[0] = stdin;
|
|
streams[1] = stdout;
|
|
streams[2] = stderr;
|
|
return streams;
|
|
}
|
|
#endif
|