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#include "state.hh"
#include <SDL3/SDL_events.h>
#include <SDL3/SDL_video.h>
#include <iostream>
namespace nes::app::sdl
{
state::state()
: application_{ display_, keyboard_, file_browser_ }
{
SDL_SetAppMetadata("NES", "1.0", "com.github.hannesschulze.nes");
if (!SDL_Init(SDL_INIT_VIDEO))
{
std::cerr << "Couldn't initialize SDL: " << SDL_GetError() << std::endl;
status_ = status::error_system_error;
return;
}
if (!SDL_CreateWindowAndRenderer("NES", display::width * 3, display::height * 3, 0, &window_, &renderer_))
{
std::cerr << "Couldn't create window/renderer: " << SDL_GetError() << std::endl;
status_ = status::error_system_error;
return;
}
SDL_SetRenderVSync(renderer_, SDL_RENDERER_VSYNC_ADAPTIVE);
if (!(texture_ = SDL_CreateTexture(renderer_, SDL_PIXELFORMAT_RGBX8888, SDL_TEXTUREACCESS_STREAMING, display::width, display::height)))
{
std::cerr << "Couldn't create texture: " << SDL_GetError() << std::endl;
status_ = status::error_system_error;
return;
}
if (!SDL_SetTextureScaleMode(texture_, SDL_SCALEMODE_NEAREST))
{
std::cerr << "Unable to set texture scale mode: " << SDL_GetError() << std::endl;
status_ = status::error_system_error;
return;
}
display_.set_texture(texture_);
}
state::~state()
{
if (texture_) { SDL_DestroyTexture(texture_); }
}
auto state::handle_event(SDL_Event* event) -> void
{
switch (event->type)
{
case SDL_EVENT_KEY_DOWN:
keyboard_.handle_key_down(event);
break;
case SDL_EVENT_KEY_UP:
keyboard_.handle_key_up(event);
break;
default:
break;
}
}
auto state::handle_iterate() -> void
{
auto const current = std::chrono::steady_clock::now();
auto const previous = last_time_point_.value_or(current);
last_time_point_ = current;
auto const elapsed_us = std::chrono::duration_cast<std::chrono::microseconds>(current - previous);
application_.frame(static_cast<u32>(elapsed_us.count()));
if (!SDL_RenderTexture(renderer_, texture_, nullptr, nullptr))
{
std::cerr << "Unable to render texture: " << SDL_GetError() << std::endl;
status_ = status::error_system_error;
return;
}
if (!SDL_RenderPresent(renderer_))
{
std::cerr << "Unable to present frame: " << SDL_GetError() << std::endl;
status_ = status::error_system_error;
return;
}
}
} // namespace nes::app::sdl
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