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#include "nes/app/application.hh"
#include "nes/app/input/input-device-keyboard.hh"
#include "nes/app/input/input-device-controller.hh"
#include "nes/app/ui/screen.hh"
#include "nes/app/graphics/renderer.hh"
#include "nes/app/action.hh"
namespace nes::app
{
auto application::display_proxy::switch_buffers() -> void
{
auto r = renderer{ base };
if (screen)
{
screen->render(r);
}
if (popup)
{
popup->render(r);
}
if (preferences_.get_fps_counter())
{
r.render_rect(30, 29, 2, 1, color::fixed_black);
auto const attrs = text_attributes{}
.set_max_width(2)
.set_alignment(text_alignment::right);
r.render_text_format(32, 29, color::fixed_white, attrs, "{}", fps_counter.get_fps());
}
base.switch_buffers();
}
application::application(display& display, input_device_keyboard& keyboard, file_browser& file_browser)
: input_manager_{ keyboard }
, file_browser_{ file_browser }
, display_{ preferences_, display }
, screen_title_{ keyboard }
, screen_browser_{ keyboard, file_browser }
, screen_settings_{ input_manager_, preferences_ }
, screen_error_{ keyboard }
, screen_confirm_quit_{ keyboard }
{
display_.screen = &screen_title_;
}
auto application::frame(u32 const elapsed_time_us) -> void
{
display_.fps_counter.frame(elapsed_time_us);
if (display_.popup)
{
auto const a = display_.popup->process_events();
handle_action(a);
}
else if (display_.screen)
{
auto const a = display_.screen->process_events();
handle_action(a);
}
if (display_.screen)
{
// Directly let the scene render itself without rendering any gameplay (the scene is responsible for
// clearing the buffer).
display_.switch_buffers();
}
else if (console_)
{
// Handle escape key.
while (auto const event = input_manager_.get_keyboard().poll_event())
{
if (event == input_event::key_down(key::escape))
{
screen_freeze_.freeze(display_);
screen_confirm_quit_.set_confirm(false);
display_.screen = &screen_freeze_;
display_.popup = &screen_confirm_quit_;
display_.switch_buffers();
return;
}
}
// Forward current input state to the NES.
console_->ref_controller_1().set_pressed(input_manager_.get_input_1().read_buttons());
console_->ref_controller_2().set_pressed(input_manager_.get_input_2().read_buttons());
// The scene is rendered by the console after the PPU requests a new frame (thus calling
// display_proxy::switch_buffers).
console_->step(sys::cycle_count::from_microseconds(elapsed_time_us));
if (console_->get_status() != status::success)
{
screen_freeze_.freeze(display_);
display_.screen = &screen_freeze_;
show_error("Runtime error", console_->get_status(), action::go_to_browser());
console_.clear();
}
}
}
auto application::handle_action(action const& a) -> void
{
switch (a.get_type())
{
case action::type::none:
{
break;
}
case action::type::go_to_title:
{
go_to_screen(&screen_title_);
break;
}
case action::type::go_to_browser:
case action::type::confirm_quit:
{
go_to_screen(&screen_browser_);
break;
}
case action::type::go_to_settings:
{
go_to_screen(&screen_settings_);
break;
}
case action::type::go_to_help:
{
// TODO
break;
}
case action::type::close_popup:
{
display_.popup = nullptr;
break;
}
case action::type::cancel_quit:
{
display_.popup = nullptr;
display_.screen = nullptr;
break;
}
case action::type::launch_game:
{
u8 buffer[sys::cartridge::max_file_size];
auto length = u32{ 0 };
if (auto const s = file_browser_.load(a.get_file_name(), buffer, &length); s != status::success)
{
show_error("Unable to open file", s);
break;
}
console_.emplace(display_, span{ buffer, length });
if (console_->get_status() != status::success)
{
show_error("Unable to load cartridge", console_->get_status());
console_.clear();
break;
}
display_.screen = nullptr;
display_.popup = nullptr;
break;
}
case action::type::show_error:
{
show_error(a.get_message(), a.get_error());
break;
}
}
}
auto application::show_error(string_view const message, status const error, action const& action) -> void
{
screen_error_.set_message(message);
screen_error_.set_error(error);
screen_error_.set_action(action);
display_.popup = &screen_error_;
}
auto application::go_to_screen(screen* screen) -> void
{
console_.clear();
display_.screen = screen;
display_.popup = nullptr;
}
} // namespace nes::app
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