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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
/*
* This code is based on the CRAB engine
*
* Copyright (c) Arvind Raja Yadav
*
* Licensed under MIT
*
*/
#include "crab/app.h"
#include "common/events.h"
#include "graphics/screen.h"
#include "crab/crab.h"
#include "crab/game.h"
#include "crab/mainmenu.h"
#include "crab/splash.h"
namespace Crab {
void App::run() {
// State IDs
GameStateID currentStateId = GAMESTATE_NULL, nextStateId = GAMESTATE_TITLE;
bool shouldChangeState = true;
// Set the current game state object
GameState *currentState = nullptr;
Timer fps;
Common::Event e;
int fpscount = 0, fpsval = 1, lasts = 0;
_game = new Game();
g_engine->_filePath->load("res/paths.xml");
loadSettings("res/settings.xml");
g_engine->_screenSettings->_inGame = false;
// While the user hasn't quit - This is the main game loop
while (currentStateId != GAMESTATE_EXIT && !g_engine->shouldQuit()) {
// Start the frame timer
fps.start();
// Change state if needed
if (shouldChangeState) {
// Delete the current state
if (currentState != _game) {
delete currentState;
currentState = nullptr;
}
if (nextStateId == GAMESTATE_EXIT)
break;
// Change the state
switch (nextStateId) {
case GAMESTATE_TITLE:
currentState = new Splash();
g_engine->_screenSettings->_inGame = false;
break;
case GAMESTATE_MAIN_MENU:
currentState = new MainMenu();
g_engine->_screenSettings->_inGame = false;
break;
case GAMESTATE_NEW_GAME:
_game->startNewGame();
currentState = _game;
g_engine->_screenSettings->_inGame = true;
break;
case GAMESTATE_LOAD_GAME:
currentState = _game;
g_engine->_screenSettings->_inGame = true;
break;
default:
// Encountering an undefined state, exit with an error code
return;
}
// Change the current state ID
currentStateId = nextStateId;
// NULL the next state ID
nextStateId = GAMESTATE_NULL;
// No need to change state until further notice
shouldChangeState = false;
}
// Do state InternalEvents
currentState->internalEvents(shouldChangeState, nextStateId);
while (g_system->getEventManager()->pollEvent(e)) {
switch (e.type) {
case Common::EVENT_CUSTOM_ENGINE_ACTION_START:
g_engine->_inputManager->_ivState[e.customType] = true;
break;
case Common::EVENT_CUSTOM_ENGINE_ACTION_END:
g_engine->_inputManager->_ivState[e.customType] = false;
break;
// explicitly specify the default block to turn off unhandled case warnings
default:
break;
}
// Do state Event handling
currentState->handleEvents(e, shouldChangeState, nextStateId);
}
// Do we have to reposition our interface?
if (g_engine->_screenSettings->_changeInterface) {
currentState->setUI();
g_engine->_screenSettings->_changeInterface = false;
}
// Do state Drawing
currentState->draw();
if (g_system->getMillis() - lasts > 1000) {
lasts = g_system->getMillis();
fpsval = fpscount;
fpscount = 1;
} else
++fpscount;
if ((g_engine->_debugDraw & DRAW_FPS) && currentStateId >= 0)
g_engine->_textManager->draw(0, 0, numberToString(fpsval).c_str(), 0);
g_engine->_screen->update();
// Cap the frame rate
if (fps.ticks() < 1000u / g_engine->_screenSettings->_fps) {
uint32 delay = (1000u / g_engine->_screenSettings->_fps) - fps.ticks();
g_system->delayMillis(delay);
}
}
if (currentState != _game)
delete currentState;
delete _game;
}
void App::loadSettings(const Common::Path &filename) {
XMLDoc settings(filename);
if (settings.ready()) {
rapidxml::xml_node<char> *node = settings.doc()->first_node("settings");
if (nodeValid(node)) {
// Load the version
loadNum(g_engine->_screenSettings->_version, "version", node);
// Load screen settings
if (nodeValid("screen", node))
g_engine->_screenSettings->load(node->first_node("screen"));
// Start the sound subsystem
g_engine->_musicManager->load(node);
g_system->lockMouse(g_engine->_screenSettings->_mouseTrap);
}
}
}
App::~App() {
// Return setting to default when game exits
g_system->lockMouse(false);
g_engine->_imageManager->quit();
g_engine->_musicManager->quit();
g_engine->_textManager->quit();
g_engine->_loadingScreen->quit();
g_engine->_mouse->quit();
}
} // End of namespace Crab
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