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/*
* Copyright 2022 Frederico de Oliveira Linhares
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <chrono>
#include <thread>
#include "core.hpp"
cg_sCore cg_core;
int main(int argc, char *argv[])
{
using namespace std::chrono;
using namespace std::this_thread;
SDL_Event event;
// Random numbers
random_number_generator.seed(random_seed());
cg_core.game_file = argv[1];
cg_core.mrb = mrb_open();
if (!cg_core.mrb) throw CommandError{"Failed to initialize mruby."};
try{ cg_sCore::loader.execute(nullptr); }
catch(const CommandError &error)
{
cg_core.log.message(Log::Level::Fatal, error.what());
mrb_close(cg_core.mrb);
return 1;
}
mrb_value main_obj{mrb_obj_iv_inspect(cg_core.mrb, cg_core.mrb->top_self)};
mrb_funcall_id(cg_core.mrb, main_obj, cg_core.sym_init, 0);
if (cg_core.mrb->exc)
{
mrb_print_error(cg_core.mrb);
cg_sCore::loader.revert(nullptr);
return 1;
}
auto frame_start = steady_clock::now();
// Game main loop.
while(!cg_core.quit_game)
{
// Get input.
while(SDL_PollEvent(&event) != 0)
{
switch(event.type)
{
case SDL_KEYDOWN:
mrb_funcall_id(
cg_core.mrb, main_obj, cg_core.sym_key_down, 1,
mrb_int_value(cg_core.mrb, event.key.keysym.sym));
break;
case SDL_KEYUP:
mrb_funcall_id(
cg_core.mrb, main_obj, cg_core.sym_key_up, 1,
mrb_int_value(cg_core.mrb, event.key.keysym.sym));
break;
case SDL_MOUSEMOTION:
break;
case SDL_MOUSEBUTTONDOWN:
break;
case SDL_MOUSEBUTTONUP:
break;
case SDL_QUIT:
mrb_funcall_id(cg_core.mrb, main_obj, cg_core.sym_quit, 0);
break;
}
}
mrb_funcall_id(cg_core.mrb, main_obj, cg_core.sym_tick, 0);
if (cg_core.mrb->exc)
{
mrb_print_error(cg_core.mrb);
cg_core.quit_game = true;
}
else
{
cg_core.vk_renderer->draw();
// Timer
{
auto frame_stop = steady_clock::now();
auto frame_duration = frame_stop - frame_start;
// If frame take less time than maximum allowed.
if(cg_core.max_frame_duration > frame_duration)
sleep_for(cg_core.max_frame_duration - frame_duration);
frame_start = frame_stop;
}
}
}
mrb_close(cg_core.mrb);
cg_sCore::loader.revert(nullptr);
return 0;
}
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