130 lines
3 KiB
C
130 lines
3 KiB
C
#include "program.h"
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#include "camera.h"
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#include "physics_world.h"
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#include "sprite.h"
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#include "time.h"
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#include "assets.h"
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#include "debug.h"
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#include "input.h"
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#include <assert.h>
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#include <SDL2/SDL_video.h>
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#include <SDL2/SDL_image.h>
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SDL_Window* g_window;
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static double _target_delta_time = 0.0;
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static double _delta_time;
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static double _frame_start;
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static double _game_start_time;
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#define INITFLAGS SDL_INIT_EVENTS | SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_GAMECONTROLLER
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static inline
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double tstos(struct timespec ts) {
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return (double)ts.tv_sec + (double)ts.tv_nsec * 1E-09;
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}
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struct timespec get_time() {
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struct timespec ts;
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timespec_get(&ts, TIME_UTC);
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return ts;
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}
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double get_time_s() {
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return tstos(get_time());
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}
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int program_run(const struct ProgramSettings* settings) {
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LOG_INFO("Starting program...");
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if(settings->target_fps <= 0) {
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_target_delta_time = 0;
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} else {
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_target_delta_time = 1.0f/settings->target_fps;
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}
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_game_start_time = _frame_start = get_time_s();
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SDL_Init(INITFLAGS);
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g_window = SDL_CreateWindow(
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settings->title,
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SDL_WINDOWPOS_CENTERED_DISPLAY(0),
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SDL_WINDOWPOS_CENTERED_DISPLAY(0),
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settings->view_resolution.x,
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settings->view_resolution.y,
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SDL_WINDOW_MAXIMIZED | SDL_WINDOW_RESIZABLE);
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render_init(g_window, settings);
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assets_init();
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camera_init();
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input_init();
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physics_world_init();
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LOG_INFO("settings->on_play");
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settings->on_play();
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LOG_INFO("Starting program loop");
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for(;;) {
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render_present();
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double current_time = get_time_s();
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_delta_time += current_time - _frame_start;
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_frame_start = current_time;
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while(_delta_time > _target_delta_time) {
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_delta_time -= _target_delta_time;
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settings->on_tick();
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physics_world_tick();
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}
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program_handle_events();
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settings->on_draw();
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SDL_Delay(1);
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}
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LOG_ERROR("Failed to exit");
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abort();
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}
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void program_quit() {
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assets_clean();
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render_clean();
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input_clean();
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physics_world_clean();
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SDL_DestroyWindow(g_window);
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SDL_Quit();
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exit(0);
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}
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void program_handle_events() {
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SDL_Event event;
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while(SDL_PollEvent(&event)) {
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switch(event.type) {
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default: break;
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case SDL_KEYUP:
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case SDL_KEYDOWN:
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input_handle_event(event);
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break;
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case SDL_WINDOWEVENT:
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if(event.window.windowID == SDL_GetWindowID(g_window)) {
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program_handle_windowevent(&event.window);
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}
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break;
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case SDL_QUIT:
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program_quit();
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break;
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}
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}
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}
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void program_handle_windowevent(SDL_WindowEvent* event) {
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switch(event->type) {
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default:
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render_handle_resize();
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break;
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}
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}
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inline
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float delta_time() {
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return _target_delta_time == 0 ? _delta_time : _target_delta_time;
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}
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