light/modules/engine/src/core/application.cpp

154 lines
3.4 KiB
C++

#include <engine/core/application.hpp>
#include <engine/core/window.hpp>
#include <engine/debug/instrumentor.hpp>
#include <engine/events/event.hpp>
#include <engine/events/keyboard.hpp>
#include <engine/events/window.hpp>
#include <engine/graphics/graphics_context.hpp>
#include <engine/graphics/render_command.hpp>
#include <engine/graphics/renderer.hpp>
#include <engine/layer/layer.hpp>
#include <engine/time/timer.hpp>
#include <engine/user_interface/user_interface.hpp>
#include <ranges>
namespace Light {
Application *Application::s_instance = nullptr;
Application::Application(): m_window(nullptr)
{
lt_assert(!s_instance, "Application constructed twice");
s_instance = this;
log_debug_data();
Light::Instrumentor::begin_session("data/logs/profile_startup.json");
m_window = Window::create([this](auto &&PH1) { on_event(std::forward<decltype(PH1)>(PH1)); });
}
Application::~Application()
{
log_trc("Application::~Application()");
Instrumentor::end_session();
}
void Application::game_loop()
{
// check
lt_assert(!LayerStack::instance().is_empty(), "layer_stack is empty");
// log debug data
m_window->get_graphics_context()->log_debug_data();
m_window->get_graphics_context()->get_user_interface()->log_debug_data();
// reveal window
m_window->set_visibility(true);
Instrumentor::end_session();
Instrumentor::begin_session("data/logs/profile_game_loop.json");
/* game loop */
auto timer = Timer {};
while (!m_window->is_closed())
{
{
// update layers
lt_profile_scope("game_loop::update");
for (auto &it : LayerStack::instance())
{
it->on_update(timer.get_elapsed_time());
}
// TODO: each layer should have their own "delta time"
timer.reset();
}
{
// render layers
lt_profile_scope("game_loop::Render");
m_window->get_graphics_context()->get_renderer()->begin_frame();
for (auto &it : LayerStack::instance())
{
it->on_render();
}
m_window->get_graphics_context()->get_renderer()->end_frame();
}
{
// render user interface
lt_profile_scope("game_loop::UserInterface");
m_window->get_graphics_context()->get_user_interface()->begin();
for (auto &it : LayerStack::instance())
{
it->on_user_interface_update();
}
m_window->get_graphics_context()->get_user_interface()->end();
}
{
// poll events
lt_profile_scope("game_loop::Events");
m_window->poll_events();
}
}
Instrumentor::end_session();
Instrumentor::begin_session("data/logs/profile_cleanup.json");
}
void Application::quit()
{
s_instance->m_window->close();
}
void Application::on_event(const Event &event)
{
// window
if (event.has_category(WindowEventCategory))
{
m_window->on_event(event);
if (event.get_event_type() == EventType::WindowResized)
{
m_window->get_graphics_context()->get_renderer()->on_window_resize(
dynamic_cast<const WindowResizedEvent &>(event)
);
}
}
// input
if (event.has_category(InputEventCategory))
{
Input::instance().on_event(event);
if (!Input::instance().is_receiving_game_events())
{
return;
}
}
for (auto &it : std::ranges::reverse_view(LayerStack::instance()))
{
if (it->on_event(event))
{
return;
}
}
}
void Application::log_debug_data()
{
log_inf("Platform::");
log_inf(" Platform name: {}", constants::platform_name);
log_inf(" Platform identifier: {}", std::to_underlying(constants::platform));
log_inf(" CWD: {}", std::filesystem::current_path().generic_string());
}
} // namespace Light