SDL3/sdl_freerdp.cpp

 
#include <iostream>
#include <memory>
#include <mutex>
 
#include <freerdp/config.h>
 
#include <cerrno>
#include <cstdio>
#include <cstring>
 
#include <freerdp/constants.h>
#include <freerdp/freerdp.h>
#include <freerdp/gdi/gdi.h>
#include <freerdp/streamdump.h>
#include <freerdp/utils/signal.h>
 
#include <freerdp/channels/channels.h>
#include <freerdp/client/channels.h>
#include <freerdp/client/cliprdr.h>
#include <freerdp/client/cmdline.h>
#include <freerdp/client/file.h>
 
#include <freerdp/log.h>
#include <winpr/assert.h>
#include <winpr/config.h>
#include <winpr/crt.h>
#include <winpr/synch.h>
 
#include <SDL3/SDL.h>
#if !defined(__MINGW32__)
#include <SDL3/SDL_main.h>
#endif
#include <SDL3/SDL_hints.h>
#include <SDL3/SDL_oldnames.h>
#include <SDL3/SDL_video.h>
 
#include <sdl_config.hpp>
 
#include "dialogs/sdl_connection_dialog_hider.hpp"
#include "dialogs/sdl_dialogs.hpp"
#include "scoped_guard.hpp"
#include "sdl_channels.hpp"
#include "sdl_freerdp.hpp"
#include "sdl_context.hpp"
#include "sdl_monitor.hpp"
#include "sdl_pointer.hpp"
#include "sdl_prefs.hpp"
#include "sdl_utils.hpp"
 
#if defined(_WIN32)
#define SDL_TAG CLIENT_TAG("SDL")
#endif
 
class ErrorMsg : public std::exception
{
  public:
  ErrorMsg(int rc, Uint32 type, const std::string& msg,
           const std::string& sdlError = SDL_GetError());
 
  [[nodiscard]] int rc() const;
  [[nodiscard]] const char* what() const noexcept override;
 
  private:
  int _rc;
  Uint32 _type;
  std::string _msg;
  std::string _sdlError;
  std::string _buffer;
};
const char* ErrorMsg::what() const noexcept
{
  return _buffer.c_str();
}
 
int ErrorMsg::rc() const
{
  return _rc;
}
 
ErrorMsg::ErrorMsg(int rc, Uint32 type, const std::string& msg, const std::string& sdlError)
    : _rc(rc), _type(type), _msg(msg), _sdlError(sdlError)
{
  std::stringstream ss;
  ss << _msg << " {" << sdl::utils::toString(_type) << "}{SDL:" << sdlError << "}";
  _buffer = ss.str();
}
 
static void sdl_term_handler([[maybe_unused]] int signum, [[maybe_unused]] const char* signame,
                             [[maybe_unused]] void* context)
{
  std::ignore = sdl_push_quit();
}
 
[[nodiscard]] static int sdl_run(SdlContext* sdl)
{
  int rc = -1;
  WINPR_ASSERT(sdl);
 
  try
  {
    while (!sdl->shallAbort())
    {
      SDL_Event windowEvent = {};
      while (!sdl->shallAbort() && SDL_WaitEventTimeout(nullptr, 1000))
      {
        /* Only poll standard SDL events and SDL_EVENT_USERS meant to create
         * dialogs. do not process the dialog return value events here.
         */
        const int prc = SDL_PeepEvents(&windowEvent, 1, SDL_GETEVENT, SDL_EVENT_FIRST,
                                       SDL_EVENT_USER_RETRY_DIALOG);
        if (prc < 0)
        {
          if (sdl_log_error(prc, sdl->getWLog(), "SDL_PeepEvents"))
            continue;
        }
 
#if defined(WITH_DEBUG_SDL_EVENTS)
      SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "got event %s [0x%08" PRIx32 "]",
                   sdl::utils::toString(windowEvent.type).c_str(), windowEvent.type);
#endif
      if (sdl->shallAbort(true))
        continue;
 
      if (sdl->getDialog().handleEvent(windowEvent))
        continue;
 
      if (!sdl->handleEvent(windowEvent))
        throw ErrorMsg{ -1, windowEvent.type, "sdl->handleEvent" };
 
      switch (windowEvent.type)
      {
        case SDL_EVENT_QUIT:
          std::ignore = freerdp_abort_connect_context(sdl->context());
          break;
        case SDL_EVENT_USER_CERT_DIALOG:
        {
          SDLConnectionDialogHider hider(sdl);
          auto title = static_cast<const char*>(windowEvent.user.data1);
          auto msg = static_cast<const char*>(windowEvent.user.data2);
          if (!sdl_cert_dialog_show(title, msg))
            throw ErrorMsg{ -1, windowEvent.type, "sdl_cert_dialog_show" };
        }
        break;
        case SDL_EVENT_USER_SHOW_DIALOG:
        {
          SDLConnectionDialogHider hider(sdl);
          auto title = static_cast<const char*>(windowEvent.user.data1);
          auto msg = static_cast<const char*>(windowEvent.user.data2);
          if (!sdl_message_dialog_show(title, msg, windowEvent.user.code))
            throw ErrorMsg{ -1, windowEvent.type, "sdl_message_dialog_show" };
        }
        break;
        case SDL_EVENT_USER_SCARD_DIALOG:
        {
          SDLConnectionDialogHider hider(sdl);
          auto title = static_cast<const char*>(windowEvent.user.data1);
          auto msg = static_cast<const char**>(windowEvent.user.data2);
          if (!sdl_scard_dialog_show(title, windowEvent.user.code, msg))
            throw ErrorMsg{ -1, windowEvent.type, "sdl_scard_dialog_show" };
        }
        break;
        case SDL_EVENT_USER_AUTH_DIALOG:
        {
          SDLConnectionDialogHider hider(sdl);
          if (!sdl_auth_dialog_show(
                  reinterpret_cast<const SDL_UserAuthArg*>(windowEvent.padding)))
            throw ErrorMsg{ -1, windowEvent.type, "sdl_auth_dialog_show" };
        }
        break;
        case SDL_EVENT_USER_UPDATE:
        {
          std::vector<SDL_Rect> rectangles;
          do
          {
            rectangles = sdl->pop();
            if (!sdl->drawToWindows(rectangles))
              throw ErrorMsg{ -1, windowEvent.type, "sdl->drawToWindows" };
          } while (!rectangles.empty());
        }
        break;
        case SDL_EVENT_USER_CREATE_WINDOWS:
        {
          auto ctx = static_cast<SdlContext*>(windowEvent.user.data1);
          if (!ctx->createWindows())
            throw ErrorMsg{ -1, windowEvent.type, "sdl->createWindows" };
        }
        break;
        case SDL_EVENT_USER_WINDOW_RESIZEABLE:
        {
          auto window = static_cast<SdlWindow*>(windowEvent.user.data1);
          const bool use = windowEvent.user.code != 0;
          if (window)
            window->resizeable(use);
        }
        break;
        case SDL_EVENT_USER_WINDOW_FULLSCREEN:
        {
          auto window = static_cast<SdlWindow*>(windowEvent.user.data1);
          const bool enter = windowEvent.user.code != 0;
          if (window)
            window->fullscreen(enter);
        }
        break;
        case SDL_EVENT_USER_WINDOW_MINIMIZE:
          if (!sdl->minimizeAllWindows())
            throw ErrorMsg{ -1, windowEvent.type, "sdl->minimizeAllWindows" };
          break;
        case SDL_EVENT_USER_POINTER_NULL:
          if (!sdl->setCursor(SdlContext::CURSOR_NULL))
            throw ErrorMsg{ -1, windowEvent.type, "sdl->setCursor" };
          break;
        case SDL_EVENT_USER_POINTER_DEFAULT:
          if (!sdl->setCursor(SdlContext::CURSOR_DEFAULT))
            throw ErrorMsg{ -1, windowEvent.type, "sdl->setCursor" };
          break;
        case SDL_EVENT_USER_POINTER_POSITION:
        {
          const auto x =
              static_cast<INT32>(reinterpret_cast<uintptr_t>(windowEvent.user.data1));
          const auto y =
              static_cast<INT32>(reinterpret_cast<uintptr_t>(windowEvent.user.data2));
          if (!sdl->moveMouseTo(
                  { static_cast<float>(x) * 1.0f, static_cast<float>(y) * 1.0f }))
            throw ErrorMsg{ -1, windowEvent.type, "sdl->moveMouseTo" };
        }
        break;
        case SDL_EVENT_USER_POINTER_SET:
          if (!sdl->setCursor(static_cast<rdpPointer*>(windowEvent.user.data1)))
            throw ErrorMsg{ -1, windowEvent.type, "sdl->setCursor" };
          break;
        case SDL_EVENT_USER_QUIT:
        default:
          break;
      }
      }
    }
  rc = 1;
  }
  catch (ErrorMsg& msg)
  {
    WLog_Print(sdl->getWLog(), WLOG_ERROR, "[exception] %s", msg.what());
    rc = msg.rc();
  }
 
  return rc;
}
 
/* Optional global initializer.
 * Here we just register a signal handler to print out stack traces
 * if available. */
[[nodiscard]] static BOOL sdl_client_global_init()
{
#if defined(_WIN32)
  WSADATA wsaData = {};
  const DWORD wVersionRequested = MAKEWORD(1, 1);
  const int rc = WSAStartup(wVersionRequested, &wsaData);
  if (rc != 0)
  {
    WLog_ERR(SDL_TAG, "WSAStartup failed with %s [%d]", gai_strerrorA(rc), rc);
    return FALSE;
  }
#endif
 
  return (freerdp_handle_signals() == 0);
}
 
/* Optional global tear down */
static void sdl_client_global_uninit()
{
#if defined(_WIN32)
  WSACleanup();
#endif
}
 
[[nodiscard]] static BOOL sdl_client_new(freerdp* instance, rdpContext* context)
{
  auto sdl = reinterpret_cast<sdl_rdp_context*>(context);
 
  if (!instance || !context)
    return FALSE;
 
  sdl->sdl = new SdlContext(context);
  return sdl->sdl != nullptr;
}
 
static void sdl_client_free([[maybe_unused]] freerdp* instance, rdpContext* context)
{
  auto sdl = reinterpret_cast<sdl_rdp_context*>(context);
 
  if (!context)
    return;
 
  delete sdl->sdl;
}
 
[[nodiscard]] static int sdl_client_start(rdpContext* context)
{
  auto sdl = get_context(context);
  WINPR_ASSERT(sdl);
  return sdl->start();
}
 
[[nodiscard]] static int sdl_client_stop(rdpContext* context)
{
  auto sdl = get_context(context);
  WINPR_ASSERT(sdl);
  return sdl->join();
}
 
static void RdpClientEntry(RDP_CLIENT_ENTRY_POINTS* pEntryPoints)
{
  WINPR_ASSERT(pEntryPoints);
 
  ZeroMemory(pEntryPoints, sizeof(RDP_CLIENT_ENTRY_POINTS));
  pEntryPoints->Version = RDP_CLIENT_INTERFACE_VERSION;
  pEntryPoints->Size = sizeof(RDP_CLIENT_ENTRY_POINTS_V1);
  pEntryPoints->GlobalInit = sdl_client_global_init;
  pEntryPoints->GlobalUninit = sdl_client_global_uninit;
  pEntryPoints->ContextSize = sizeof(sdl_rdp_context);
  pEntryPoints->ClientNew = sdl_client_new;
  pEntryPoints->ClientFree = sdl_client_free;
  pEntryPoints->ClientStart = sdl_client_start;
  pEntryPoints->ClientStop = sdl_client_stop;
}
 
static void context_free(sdl_rdp_context* sdl)
{
  if (sdl)
    freerdp_client_context_free(&sdl->common.context);
}
 
[[nodiscard]] static const char* category2str(int category)
{
  switch (category)
  {
    case SDL_LOG_CATEGORY_APPLICATION:
      return "SDL_LOG_CATEGORY_APPLICATION";
    case SDL_LOG_CATEGORY_ERROR:
      return "SDL_LOG_CATEGORY_ERROR";
    case SDL_LOG_CATEGORY_ASSERT:
      return "SDL_LOG_CATEGORY_ASSERT";
    case SDL_LOG_CATEGORY_SYSTEM:
      return "SDL_LOG_CATEGORY_SYSTEM";
    case SDL_LOG_CATEGORY_AUDIO:
      return "SDL_LOG_CATEGORY_AUDIO";
    case SDL_LOG_CATEGORY_VIDEO:
      return "SDL_LOG_CATEGORY_VIDEO";
    case SDL_LOG_CATEGORY_RENDER:
      return "SDL_LOG_CATEGORY_RENDER";
    case SDL_LOG_CATEGORY_INPUT:
      return "SDL_LOG_CATEGORY_INPUT";
    case SDL_LOG_CATEGORY_TEST:
      return "SDL_LOG_CATEGORY_TEST";
    case SDL_LOG_CATEGORY_GPU:
      return "SDL_LOG_CATEGORY_GPU";
    case SDL_LOG_CATEGORY_RESERVED2:
      return "SDL_LOG_CATEGORY_RESERVED2";
    case SDL_LOG_CATEGORY_RESERVED3:
      return "SDL_LOG_CATEGORY_RESERVED3";
    case SDL_LOG_CATEGORY_RESERVED4:
      return "SDL_LOG_CATEGORY_RESERVED4";
    case SDL_LOG_CATEGORY_RESERVED5:
      return "SDL_LOG_CATEGORY_RESERVED5";
    case SDL_LOG_CATEGORY_RESERVED6:
      return "SDL_LOG_CATEGORY_RESERVED6";
    case SDL_LOG_CATEGORY_RESERVED7:
      return "SDL_LOG_CATEGORY_RESERVED7";
    case SDL_LOG_CATEGORY_RESERVED8:
      return "SDL_LOG_CATEGORY_RESERVED8";
    case SDL_LOG_CATEGORY_RESERVED9:
      return "SDL_LOG_CATEGORY_RESERVED9";
    case SDL_LOG_CATEGORY_RESERVED10:
      return "SDL_LOG_CATEGORY_RESERVED10";
    case SDL_LOG_CATEGORY_CUSTOM:
    default:
      return "SDL_LOG_CATEGORY_CUSTOM";
  }
}
 
[[nodiscard]] static SDL_LogPriority wloglevel2dl(DWORD level)
{
  switch (level)
  {
    case WLOG_TRACE:
      return SDL_LOG_PRIORITY_VERBOSE;
    case WLOG_DEBUG:
      return SDL_LOG_PRIORITY_DEBUG;
    case WLOG_INFO:
      return SDL_LOG_PRIORITY_INFO;
    case WLOG_WARN:
      return SDL_LOG_PRIORITY_WARN;
    case WLOG_ERROR:
      return SDL_LOG_PRIORITY_ERROR;
    case WLOG_FATAL:
      return SDL_LOG_PRIORITY_CRITICAL;
    case WLOG_OFF:
    default:
      return SDL_LOG_PRIORITY_VERBOSE;
  }
}
 
[[nodiscard]] static DWORD sdlpriority2wlog(SDL_LogPriority priority)
{
  DWORD level = WLOG_OFF;
  switch (priority)
  {
    case SDL_LOG_PRIORITY_VERBOSE:
      level = WLOG_TRACE;
      break;
    case SDL_LOG_PRIORITY_DEBUG:
      level = WLOG_DEBUG;
      break;
    case SDL_LOG_PRIORITY_INFO:
      level = WLOG_INFO;
      break;
    case SDL_LOG_PRIORITY_WARN:
      level = WLOG_WARN;
      break;
    case SDL_LOG_PRIORITY_ERROR:
      level = WLOG_ERROR;
      break;
    case SDL_LOG_PRIORITY_CRITICAL:
      level = WLOG_FATAL;
      break;
    default:
      break;
  }
 
  return level;
}
 
static void SDLCALL winpr_LogOutputFunction(void* userdata, int category, SDL_LogPriority priority,
                                            const char* message)
{
  auto sdl = static_cast<SdlContext*>(userdata);
  WINPR_ASSERT(sdl);
 
  const DWORD level = sdlpriority2wlog(priority);
  auto log = sdl->getWLog();
  if (!WLog_IsLevelActive(log, level))
    return;
 
  WLog_PrintTextMessage(log, level, __LINE__, __FILE__, __func__, "[%s] %s",
                        category2str(category), message);
}
 
static void sdl_quit()
{
  SDL_Event ev = {};
  ev.type = SDL_EVENT_QUIT;
  if (!SDL_PushEvent(&ev))
  {
    SDL_Log("An error occurred: %s", SDL_GetError());
  }
}
 
static void SDLCALL rdp_file_cb(void* userdata, const char* const* filelist,
                                WINPR_ATTR_UNUSED int filter)
{
  auto rdp = static_cast<std::string*>(userdata);
 
  if (!filelist)
  {
    SDL_Log("An error occurred: %s", SDL_GetError());
    sdl_quit();
    return;
  }
  else if (!*filelist)
  {
    SDL_Log("The user did not select any file.");
    SDL_Log("Most likely, the dialog was canceled.");
    sdl_quit();
    return;
  }
 
  while (*filelist)
  {
    SDL_Log("Full path to selected file: '%s'", *filelist);
    *rdp = *filelist;
    filelist++;
  }
 
  sdl_quit();
}
 
[[nodiscard]] static std::string getRdpFile()
{
  const auto flags = SDL_INIT_VIDEO | SDL_INIT_EVENTS;
  SDL_DialogFileFilter filters[] = { { "RDP files", "rdp;rdpw" } };
  std::string rdp;
 
  bool running = true;
  if (!SDL_Init(flags))
    return {};
 
  auto props = SDL_CreateProperties();
  SDL_SetStringProperty(props, SDL_PROP_FILE_DIALOG_TITLE_STRING,
                        "SDL Freerdp - Open a RDP file");
  SDL_SetBooleanProperty(props, SDL_PROP_FILE_DIALOG_MANY_BOOLEAN, false);
  SDL_SetPointerProperty(props, SDL_PROP_FILE_DIALOG_FILTERS_POINTER, filters);
  SDL_SetNumberProperty(props, SDL_PROP_FILE_DIALOG_NFILTERS_NUMBER, ARRAYSIZE(filters));
  SDL_ShowFileDialogWithProperties(SDL_FILEDIALOG_OPENFILE, rdp_file_cb, &rdp, props);
  SDL_DestroyProperties(props);
 
  do
  {
    SDL_Event event = {};
    std::ignore = SDL_PollEvent(&event);
 
    switch (event.type)
    {
      case SDL_EVENT_QUIT:
        running = false;
        break;
      default:
        break;
    }
  } while (running);
  SDL_Quit();
  return rdp;
}
 
int main(int argc, char* argv[])
{
  int rc = -1;
  RDP_CLIENT_ENTRY_POINTS clientEntryPoints = {};
 
  /* Allocate the RDP context first, we need to pass it to SDL */
  RdpClientEntry(&clientEntryPoints);
  std::unique_ptr<sdl_rdp_context, void (*)(sdl_rdp_context*)> sdl_rdp(
      reinterpret_cast<sdl_rdp_context*>(freerdp_client_context_new(&clientEntryPoints)),
      context_free);
 
  if (!sdl_rdp)
    return -1;
  auto sdl = sdl_rdp->sdl;
 
  auto settings = sdl->context()->settings;
  WINPR_ASSERT(settings);
 
  std::string rdp_file;
  std::vector<char*> args;
  args.reserve(WINPR_ASSERTING_INT_CAST(size_t, argc));
  for (auto x = 0; x < argc; x++)
    args.push_back(argv[x]);
 
  if (argc == 1)
  {
    rdp_file = getRdpFile();
    if (!rdp_file.empty())
    {
      args.push_back(rdp_file.data());
    }
  }
 
  auto status = freerdp_client_settings_parse_command_line(
      settings, WINPR_ASSERTING_INT_CAST(int, args.size()), args.data(), FALSE);
  sdl_rdp->sdl->setMetadata();
  if (status)
  {
    rc = freerdp_client_settings_command_line_status_print(settings, status, argc, argv);
    if (freerdp_settings_get_bool(settings, FreeRDP_ListMonitors))
    {
      if (!sdl_list_monitors(sdl))
        return -1;
    }
    else
    {
      switch (status)
      {
        case COMMAND_LINE_STATUS_PRINT:
        case COMMAND_LINE_STATUS_PRINT_VERSION:
        case COMMAND_LINE_STATUS_PRINT_BUILDCONFIG:
          break;
        case COMMAND_LINE_STATUS_PRINT_HELP:
        default:
          SdlPref::print_config_file_help(3);
          break;
      }
    }
    return rc;
  }
 
  /* Basic SDL initialization */
  if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS))
    return -1;
 
  /* Redirect SDL log messages to wLog */
  SDL_SetLogOutputFunction(winpr_LogOutputFunction, sdl);
  auto level = WLog_GetLogLevel(sdl->getWLog());
  SDL_SetLogPriorities(wloglevel2dl(level));
 
  auto backend = SDL_GetCurrentVideoDriver();
  WLog_Print(sdl->getWLog(), WLOG_DEBUG, "client is using backend '%s'", backend);
  sdl_dialogs_init();
 
  SDL_SetHint(SDL_HINT_ALLOW_ALT_TAB_WHILE_GRABBED, "0");
  SDL_SetHint(SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0");
  SDL_SetHint(SDL_HINT_PEN_MOUSE_EVENTS, "0");
  SDL_SetHint(SDL_HINT_TOUCH_MOUSE_EVENTS, "0");
  SDL_SetHint(SDL_HINT_PEN_TOUCH_EVENTS, "1");
  SDL_SetHint(SDL_HINT_TRACKPAD_IS_TOUCH_ONLY, "1");
 
  /* SDL cleanup code if the client exits */
  ScopeGuard guard(
      [&]()
      {
        sdl->cleanup();
        freerdp_del_signal_cleanup_handler(sdl->context(), sdl_term_handler);
        sdl_dialogs_uninit();
        SDL_Quit();
      });
 
  /* Initialize RDP */
  auto context = sdl->context();
  WINPR_ASSERT(context);
 
  if (!stream_dump_register_handlers(context, CONNECTION_STATE_MCS_CREATE_REQUEST, FALSE))
    return -1;
 
  if (freerdp_client_start(context) != 0)
    return -1;
 
  rc = sdl_run(sdl);
 
  if (freerdp_client_stop(context) != 0)
    return -1;
 
  if (sdl->exitCode() != 0)
    rc = sdl->exitCode();
 
  return rc;
}