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#include "renderer/Renderer.hpp"
#include "games/Game.hpp"
#include "common/MemoryManager.hpp"
#include <glad/gl.h>
#include <SDL3/SDL.h>
#include <SDL3/SDL_video.h>
#include <imgui.h>
#include <imgui_impl_opengl3.h>
#include <imgui_impl_sdl3.h>
#include <iostream>
#include <memory>
#include <cstdlib>
#include <assert.h>
#include <chrono>
Game::GameType
DrawGameMenu()
{
Game::GameType type = Game::no_game;
ImGuiWindowFlags flags = 0;
ImVec2 pos = {100, 200};
ImGui::SetNextWindowPos(pos);
ImGui::Begin("Game Selection", nullptr, flags);
if (ImGui::Button("Tetris")) {
type = Game::tetris;
}
if (ImGui::Button("Minesweeper")) {
type = Game::minesweeper;
}
if (ImGui::Button("Snake")) {
type = Game::snake;
}
if (ImGui::Button("Breakout")) {
type = Game::breakout;
}
ImGui::End();
return type;
}
void
DrawPerformanceInfo(float ms_used)
{
ImGuiIO& io = ImGui::GetIO();
ImGuiWindowFlags flags = ImGuiWindowFlags_NoNav | ImGuiWindowFlags_NoTitleBar | ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoBackground | ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoMove;
float ms_per_frame = 1000.0f / io.Framerate;
float load = (ms_used / ms_per_frame) * 100;
ImGui::SetNextWindowPos(ImVec2(io.DisplaySize.x - 350, 0));
ImGui::Begin("Performance", nullptr, flags);
ImGui::Text("%.2f ms/frame (%.2f %%) | %.2f ms/frame (%.f FPS)", ms_used, load, ms_per_frame, io.Framerate);
ImGui::End();
}
SDL_Window*
CreateWindow()
{
if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_GAMEPAD)) {
std::cerr << "Failed to init SDL3: " << SDL_GetError() << '\n';
return nullptr;
}
const char* glsl_version = "#version 330";
SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_COMPATIBILITY);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24);
SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8);
SDL_Window* window = SDL_CreateWindow("fsarcade", 1280, 960, SDL_WINDOW_OPENGL | SDL_WINDOW_HIDDEN | SDL_WINDOW_HIGH_PIXEL_DENSITY);
if (!window) {
std::cerr << "Failed to create SDL_window: " << SDL_GetError() << '\n';
return nullptr;
}
SDL_GLContext sdl_gl_context = SDL_GL_CreateContext(window);
if (!sdl_gl_context) {
std::cerr << "Failed to create SDL_GLContext: " << SDL_GetError() << '\n';
SDL_DestroyWindow(window);
return nullptr;
}
SDL_GL_MakeCurrent(window, sdl_gl_context);
SDL_GL_SetSwapInterval(1); // enable vsync
if (!gladLoadGL(SDL_GL_GetProcAddress)) {
SDL_GL_DestroyContext(sdl_gl_context);
SDL_DestroyWindow(window);
std::cerr << "Failed to init GLAD!\n";
return nullptr;
}
SDL_SetWindowPosition(window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED);
SDL_ShowWindow(window);
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO();
io.IniFilename = NULL;
io.LogFilename = NULL;
io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;
ImGui::StyleColorsDark();
ImGui_ImplSDL3_InitForOpenGL(window, sdl_gl_context);
ImGui_ImplOpenGL3_Init(glsl_version);
return window;
}
int
main(int argc, char** argv)
{
SDL_Window* window = CreateWindow();
if (!window) {
return 0;
}
g_renderer.Init(window);
std::unique_ptr<Game> game = nullptr;
std::vector<SDL_Event> game_events;
game_events.reserve(32);
for (;;) {
ImGui_ImplOpenGL3_NewFrame();
ImGui_ImplSDL3_NewFrame();
ImGui::NewFrame();
auto start_time = std::chrono::high_resolution_clock::now();
size_t cur_game_events = 0;
size_t max_game_events = game_events.max_size();
SDL_Event event;
while (cur_game_events < max_game_events && SDL_PollEvent(&event)) {
if (event.type == SDL_EVENT_KEY_DOWN ||
event.type == SDL_EVENT_KEY_UP ||
event.type == SDL_EVENT_MOUSE_BUTTON_DOWN)
{
game_events.emplace_back(event);
cur_game_events++;
}
ImGui_ImplSDL3_ProcessEvent(&event);
if (event.type == SDL_EVENT_QUIT)
return 0;
if (event.type == SDL_EVENT_WINDOW_CLOSE_REQUESTED && event.window.windowID == SDL_GetWindowID(window))
return 0;
if (event.type == SDL_EVENT_WINDOW_DESTROYED && event.window.windowID == SDL_GetWindowID(window)) {
return 0;
}
}
int w, h;
SDL_GetWindowSize(window, &w, &h);
g_renderer.SetScreenSize(w, h);
g_renderer.SetClearColor({0.3f, 0.3f, 0.3f});
g_renderer.SetCameraSize(4.0f, 3.0f);
if (game) {
bool keep_game_running = game->Update(game_events);
if (!keep_game_running) {
game.reset();
}
}
else {
Game::GameType type = DrawGameMenu();
if (type != Game::no_game) {
game = Game::Select(type);
}
}
game_events.clear();
g_renderer.Draw();
auto end_time = std::chrono::high_resolution_clock::now();
float ms_used = float((end_time - start_time) / std::chrono::microseconds(1)) / 1000;
DrawPerformanceInfo(ms_used);
ImGui::Render();
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
SDL_GL_SwapWindow(window);
g_renderer.Reset();
MemoryManager::Clear_Frame();
}
return 0;
}
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