SDL3/sdl_window.cpp

 
#include <limits>
#include <sstream>
#include <cmath>
 
#include "sdl_window.hpp"
#include "sdl_utils.hpp"
 
#include <freerdp/utils/string.h>
 
SdlWindow::SdlWindow(SDL_DisplayID id, const std::string& title, const SDL_Rect& rect,
                     [[maybe_unused]] Uint32 flags)
    : _displayID(id)
{
  auto props = SDL_CreateProperties();
  SDL_SetStringProperty(props, SDL_PROP_WINDOW_CREATE_TITLE_STRING, title.c_str());
  SDL_SetNumberProperty(props, SDL_PROP_WINDOW_CREATE_X_NUMBER, rect.x);
  SDL_SetNumberProperty(props, SDL_PROP_WINDOW_CREATE_Y_NUMBER, rect.y);
  SDL_SetNumberProperty(props, SDL_PROP_WINDOW_CREATE_WIDTH_NUMBER, rect.w);
  SDL_SetNumberProperty(props, SDL_PROP_WINDOW_CREATE_HEIGHT_NUMBER, rect.h);
 
  if (flags & SDL_WINDOW_HIGH_PIXEL_DENSITY)
    SDL_SetBooleanProperty(props, SDL_PROP_WINDOW_CREATE_HIGH_PIXEL_DENSITY_BOOLEAN, true);
 
  if (flags & SDL_WINDOW_FULLSCREEN)
    SDL_SetBooleanProperty(props, SDL_PROP_WINDOW_CREATE_FULLSCREEN_BOOLEAN, true);
 
  if (flags & SDL_WINDOW_BORDERLESS)
    SDL_SetBooleanProperty(props, SDL_PROP_WINDOW_CREATE_BORDERLESS_BOOLEAN, true);
 
  _window = SDL_CreateWindowWithProperties(props);
  SDL_DestroyProperties(props);
 
  auto sc = scale();
  const int iscale = static_cast<int>(sc * 100.0f);
  auto w = 100 * rect.w / iscale;
  auto h = 100 * rect.h / iscale;
  std::ignore = resize({ w, h });
  SDL_SetHint(SDL_HINT_APP_NAME, "");
  std::ignore = SDL_SyncWindow(_window);
 
  _monitor = query(_window, id, true);
}
 
SdlWindow::SdlWindow(SdlWindow&& other) noexcept
    : _window(other._window), _displayID(other._displayID), _offset_x(other._offset_x),
      _offset_y(other._offset_y), _monitor(other._monitor)
{
  other._window = nullptr;
}
 
SdlWindow::~SdlWindow()
{
  SDL_DestroyWindow(_window);
}
 
SDL_WindowID SdlWindow::id() const
{
  if (!_window)
    return 0;
  return SDL_GetWindowID(_window);
}
 
SDL_DisplayID SdlWindow::displayIndex() const
{
  if (!_window)
    return 0;
  return SDL_GetDisplayForWindow(_window);
}
 
SDL_Rect SdlWindow::rect() const
{
  return rect(_window);
}
 
SDL_Rect SdlWindow::bounds() const
{
  SDL_Rect rect = {};
  if (_window)
  {
    if (!SDL_GetWindowPosition(_window, &rect.x, &rect.y))
      return {};
    if (!SDL_GetWindowSize(_window, &rect.w, &rect.h))
      return {};
  }
  return rect;
}
 
SDL_Window* SdlWindow::window() const
{
  return _window;
}
 
Sint32 SdlWindow::offsetX() const
{
  return _offset_x;
}
 
void SdlWindow::setOffsetX(Sint32 x)
{
  _offset_x = x;
}
 
void SdlWindow::setOffsetY(Sint32 y)
{
  _offset_y = y;
}
 
Sint32 SdlWindow::offsetY() const
{
  return _offset_y;
}
 
rdpMonitor SdlWindow::monitor(bool isPrimary) const
{
  auto m = _monitor;
  if (isPrimary)
  {
    m.x = 0;
    m.y = 0;
  }
  return m;
}
 
void SdlWindow::setMonitor(rdpMonitor monitor)
{
  _monitor = monitor;
}
 
float SdlWindow::scale() const
{
  return SDL_GetWindowDisplayScale(_window);
}
 
SDL_DisplayOrientation SdlWindow::orientation() const
{
  const auto did = displayIndex();
  return SDL_GetCurrentDisplayOrientation(did);
}
 
bool SdlWindow::grabKeyboard(bool enable)
{
  if (!_window)
    return false;
  SDL_SetWindowKeyboardGrab(_window, enable);
  return true;
}
 
bool SdlWindow::grabMouse(bool enable)
{
  if (!_window)
    return false;
  SDL_SetWindowMouseGrab(_window, enable);
  return true;
}
 
void SdlWindow::setBordered(bool bordered)
{
  if (_window)
    SDL_SetWindowBordered(_window, bordered);
  std::ignore = SDL_SyncWindow(_window);
}
 
void SdlWindow::raise()
{
  SDL_RaiseWindow(_window);
  std::ignore = SDL_SyncWindow(_window);
}
 
void SdlWindow::resizeable(bool use)
{
  SDL_SetWindowResizable(_window, use);
  std::ignore = SDL_SyncWindow(_window);
}
 
void SdlWindow::fullscreen(bool enter, bool forceOriginalDisplay)
{
  if (enter && forceOriginalDisplay && _displayID != 0)
  {
    /* Move the window to the desired display. We should not wait
     * for the window to be moved, because some backends can refuse
     * the move. The intent of moving the window is enough for SDL
     * to decide which display will be used for fullscreen. */
    SDL_Rect rect = {};
    std::ignore = SDL_GetDisplayBounds(_displayID, &rect);
    std::ignore = SDL_SetWindowPosition(_window, rect.x, rect.y);
  }
  std::ignore = SDL_SetWindowFullscreen(_window, enter);
  std::ignore = SDL_SyncWindow(_window);
}
 
void SdlWindow::minimize()
{
  SDL_MinimizeWindow(_window);
  std::ignore = SDL_SyncWindow(_window);
}
 
bool SdlWindow::resize(const SDL_Point& size)
{
  return SDL_SetWindowSize(_window, size.x, size.y);
}
 
bool SdlWindow::drawRect(SDL_Surface* surface, SDL_Point offset, const SDL_Rect& srcRect)
{
  WINPR_ASSERT(surface);
  SDL_Rect dstRect = { offset.x + srcRect.x, offset.y + srcRect.y, srcRect.w, srcRect.h };
  return blit(surface, srcRect, dstRect);
}
 
bool SdlWindow::drawRects(SDL_Surface* surface, SDL_Point offset,
                          const std::vector<SDL_Rect>& rects)
{
  if (rects.empty())
  {
    return drawRect(surface, offset, { 0, 0, surface->w, surface->h });
  }
  for (auto& srcRect : rects)
  {
    if (!drawRect(surface, offset, srcRect))
      return false;
  }
  return true;
}
 
bool SdlWindow::drawScaledRect(SDL_Surface* surface, const SDL_FPoint& scale,
                               const SDL_Rect& srcRect)
{
  SDL_Rect dstRect = srcRect;
  dstRect.x = static_cast<Sint32>(static_cast<float>(dstRect.x) * scale.x);
  dstRect.w = static_cast<Sint32>(static_cast<float>(dstRect.w) * scale.x);
  dstRect.y = static_cast<Sint32>(static_cast<float>(dstRect.y) * scale.y);
  dstRect.h = static_cast<Sint32>(static_cast<float>(dstRect.h) * scale.y);
  return blit(surface, srcRect, dstRect);
}
 
bool SdlWindow::drawScaledRects(SDL_Surface* surface, const SDL_FPoint& scale,
                                const std::vector<SDL_Rect>& rects)
{
  if (rects.empty())
  {
    return drawScaledRect(surface, scale, { 0, 0, surface->w, surface->h });
  }
  for (const auto& srcRect : rects)
  {
    if (!drawScaledRect(surface, scale, srcRect))
      return false;
  }
  return true;
}
 
bool SdlWindow::fill(Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{
  return fill(_window, r, g, b, a);
}
 
bool SdlWindow::fill(SDL_Window* window, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{
  auto surface = SDL_GetWindowSurface(window);
  if (!surface)
    return false;
  SDL_Rect rect = { 0, 0, surface->w, surface->h };
  auto color = SDL_MapSurfaceRGBA(surface, r, g, b, a);
 
  return SDL_FillSurfaceRect(surface, &rect, color);
}
 
rdpMonitor SdlWindow::query(SDL_Window* window, SDL_DisplayID id, bool forceAsPrimary)
{
  if (!window)
    return {};
 
  const auto& r = rect(window, forceAsPrimary);
  const float factor = SDL_GetWindowDisplayScale(window);
  const float dpi = std::roundf(factor * 100.0f);
 
  WINPR_ASSERT(r.w > 0);
  WINPR_ASSERT(r.h > 0);
 
  const auto primary = SDL_GetPrimaryDisplay();
  const auto orientation = SDL_GetCurrentDisplayOrientation(id);
  const auto rdp_orientation = sdl::utils::orientaion_to_rdp(orientation);
 
  rdpMonitor monitor{};
  monitor.orig_screen = id;
  monitor.x = r.x;
  monitor.y = r.y;
  monitor.width = r.w;
  monitor.height = r.h;
  monitor.is_primary = forceAsPrimary || (id == primary);
  monitor.attributes.desktopScaleFactor = static_cast<UINT32>(dpi);
  monitor.attributes.deviceScaleFactor = 100;
  monitor.attributes.orientation = rdp_orientation;
  monitor.attributes.physicalWidth = WINPR_ASSERTING_INT_CAST(uint32_t, r.w);
  monitor.attributes.physicalHeight = WINPR_ASSERTING_INT_CAST(uint32_t, r.h);
 
  const auto cat = SDL_LOG_CATEGORY_APPLICATION;
  SDL_LogDebug(cat, "monitor.orig_screen                   %" PRIu32, monitor.orig_screen);
  SDL_LogDebug(cat, "monitor.x                             %" PRId32, monitor.x);
  SDL_LogDebug(cat, "monitor.y                             %" PRId32, monitor.y);
  SDL_LogDebug(cat, "monitor.width                         %" PRId32, monitor.width);
  SDL_LogDebug(cat, "monitor.height                        %" PRId32, monitor.height);
  SDL_LogDebug(cat, "monitor.is_primary                    %" PRIu32, monitor.is_primary);
  SDL_LogDebug(cat, "monitor.attributes.desktopScaleFactor %" PRIu32,
               monitor.attributes.desktopScaleFactor);
  SDL_LogDebug(cat, "monitor.attributes.deviceScaleFactor  %" PRIu32,
               monitor.attributes.deviceScaleFactor);
  SDL_LogDebug(cat, "monitor.attributes.orientation        %s",
               freerdp_desktop_rotation_flags_to_string(monitor.attributes.orientation));
  SDL_LogDebug(cat, "monitor.attributes.physicalWidth      %" PRIu32,
               monitor.attributes.physicalWidth);
  SDL_LogDebug(cat, "monitor.attributes.physicalHeight     %" PRIu32,
               monitor.attributes.physicalHeight);
  return monitor;
}
 
SDL_Rect SdlWindow::rect(SDL_Window* window, bool forceAsPrimary)
{
  SDL_Rect rect = {};
  if (!window)
    return {};
 
  if (!forceAsPrimary)
  {
    if (!SDL_GetWindowPosition(window, &rect.x, &rect.y))
      return {};
  }
 
  if (!SDL_GetWindowSizeInPixels(window, &rect.w, &rect.h))
    return {};
 
  const auto flags = SDL_GetWindowFlags(window);
  const auto mask = SDL_WINDOW_FULLSCREEN;
  const auto fs = (flags & mask) == mask;
  if (fs && tryFallback())
  {
    /* On wlroots compositors (Sway, river, etc.), windows that are hidden/unmapped
     * don't get their actual display dimensions. The dummy window returns its creation size
     * (64x64) instead of the display size. This causes validation errors since we require >=
     * 200px. Workaround: If we got dimensions that are too small, query the display directly.
     */
 
    const auto displayID = SDL_GetDisplayForWindow(window);
    SDL_Rect displayBounds = {};
    if (SDL_GetDisplayBounds(displayID, &displayBounds))
    {
      if (forceAsPrimary)
      {
        rect.x = 0;
        rect.y = 0;
      }
      rect.w = displayBounds.w;
      rect.h = displayBounds.h;
 
      const float contentScale = SDL_GetDisplayContentScale(displayID);
      if (contentScale > 1.0f)
      {
        const auto fw = static_cast<float>(rect.w);
        const auto fh = static_cast<float>(rect.h);
        rect.w = static_cast<int>(std::roundf(fw * contentScale));
        rect.h = static_cast<int>(std::roundf(fh * contentScale));
      }
    }
  }
 
  return rect;
}
 
SdlWindow::HighDPIMode SdlWindow::isHighDPIWindowsMode(SDL_Window* window)
{
  if (!window)
    return MODE_INVALID;
 
  const auto id = SDL_GetDisplayForWindow(window);
  if (id == 0)
    return MODE_INVALID;
 
  const auto cs = SDL_GetDisplayContentScale(id);
  const auto ds = SDL_GetWindowDisplayScale(window);
  const auto pd = SDL_GetWindowPixelDensity(window);
 
  /* mac os x style, but no HighDPI display */
  if ((cs == 1.0f) && (ds == 1.0f) && (pd == 1.0f))
    return MODE_NONE;
 
  /* mac os x style HighDPI */
  if ((cs == 1.0f) && (ds > 1.0f) && (pd > 1.0f))
    return MODE_MACOS;
 
  /* rest is windows style */
  return MODE_WINDOWS;
}
 
bool SdlWindow::blit(SDL_Surface* surface, const SDL_Rect& srcRect, SDL_Rect& dstRect)
{
  auto screen = SDL_GetWindowSurface(_window);
  if (!screen || !surface)
    return false;
  if (!SDL_SetSurfaceClipRect(surface, &srcRect))
    return true;
  if (!SDL_SetSurfaceClipRect(screen, &dstRect))
    return true;
  if (!SDL_BlitSurfaceScaled(surface, &srcRect, screen, &dstRect, SDL_SCALEMODE_LINEAR))
  {
    SDL_LogError(SDL_LOG_CATEGORY_RENDER, "SDL_BlitScaled: %s", SDL_GetError());
    return false;
  }
  return true;
}
 
void SdlWindow::updateSurface()
{
  SDL_UpdateWindowSurface(_window);
}
 
SdlWindow SdlWindow::create(SDL_DisplayID id, const std::string& title, Uint32 flags, Uint32 width,
                            Uint32 height)
{
  flags |= SDL_WINDOW_HIGH_PIXEL_DENSITY;
 
  SDL_Rect rect = { static_cast<int>(SDL_WINDOWPOS_CENTERED_DISPLAY(id)),
                  static_cast<int>(SDL_WINDOWPOS_CENTERED_DISPLAY(id)), static_cast<int>(width),
                  static_cast<int>(height) };
 
  if ((flags & SDL_WINDOW_FULLSCREEN) != 0)
  {
    std::ignore = SDL_GetDisplayBounds(id, &rect);
  }
 
  SdlWindow window{ id, title, rect, flags };
 
  if ((flags & (SDL_WINDOW_FULLSCREEN)) != 0)
  {
    window.setOffsetX(rect.x);
    window.setOffsetY(rect.y);
  }
 
  return window;
}
 
static SDL_Window* createDummy(SDL_DisplayID id)
{
  const auto x = SDL_WINDOWPOS_CENTERED_DISPLAY(id);
  const auto y = SDL_WINDOWPOS_CENTERED_DISPLAY(id);
  const int w = 64;
  const int h = 64;
 
  auto props = SDL_CreateProperties();
  std::stringstream ss;
  ss << "SdlWindow::query(" << id << ")";
  SDL_SetStringProperty(props, SDL_PROP_WINDOW_CREATE_TITLE_STRING, ss.str().c_str());
  SDL_SetNumberProperty(props, SDL_PROP_WINDOW_CREATE_X_NUMBER, x);
  SDL_SetNumberProperty(props, SDL_PROP_WINDOW_CREATE_Y_NUMBER, y);
  SDL_SetNumberProperty(props, SDL_PROP_WINDOW_CREATE_WIDTH_NUMBER, w);
  SDL_SetNumberProperty(props, SDL_PROP_WINDOW_CREATE_HEIGHT_NUMBER, h);
 
  SDL_SetBooleanProperty(props, SDL_PROP_WINDOW_CREATE_HIGH_PIXEL_DENSITY_BOOLEAN, true);
  SDL_SetBooleanProperty(props, SDL_PROP_WINDOW_CREATE_FULLSCREEN_BOOLEAN, false);
  SDL_SetBooleanProperty(props, SDL_PROP_WINDOW_CREATE_BORDERLESS_BOOLEAN, true);
  SDL_SetBooleanProperty(props, SDL_PROP_WINDOW_CREATE_HIDDEN_BOOLEAN, false);
 
  auto window = SDL_CreateWindowWithProperties(props);
  SDL_DestroyProperties(props);
 
  /* Workaround: we need to properly position the window on the correct monitor
   * before going fullscreen. Otherwise we will get the primary monitor details.
   */
  if (window)
  {
    SDL_Rect rect = {};
    std::ignore = SDL_GetDisplayBounds(id, &rect);
    std::ignore = SDL_SetWindowPosition(window, rect.x, rect.y);
    std::ignore = SDL_SetWindowFullscreen(window, true);
  }
  return window;
}
 
rdpMonitor SdlWindow::query(SDL_DisplayID id, bool forceAsPrimary)
{
  std::unique_ptr<SDL_Window, void (*)(SDL_Window*)> window(createDummy(id), SDL_DestroyWindow);
  if (!window)
    return {};
 
  std::unique_ptr<SDL_Renderer, void (*)(SDL_Renderer*)> renderer(
      SDL_CreateRenderer(window.get(), nullptr), SDL_DestroyRenderer);
 
  if (!SDL_SyncWindow(window.get()))
    return {};
 
  SDL_Event event{};
  while (SDL_PollEvent(&event))
    ;
 
  return query(window.get(), id, forceAsPrimary);
}
 
SDL_Rect SdlWindow::rect(SDL_DisplayID id, bool forceAsPrimary)
{
  std::unique_ptr<SDL_Window, void (*)(SDL_Window*)> window(createDummy(id), SDL_DestroyWindow);
  if (!window)
    return {};
 
  std::unique_ptr<SDL_Renderer, void (*)(SDL_Renderer*)> renderer(
      SDL_CreateRenderer(window.get(), nullptr), SDL_DestroyRenderer);
 
  if (!SDL_SyncWindow(window.get()))
    return {};
 
  SDL_Event event{};
  while (SDL_PollEvent(&event))
    ;
 
  return rect(window.get(), forceAsPrimary);
}
 
bool SdlWindow::tryFallback()
{
  /* If we define a custom env variable to use the wlroots hack
   * then enable/disable according to this setting only.
   */
  const auto wlroots_hack = SDL_getenv("FREERDP_WLROOTS_HACK");
  if (wlroots_hack != nullptr)
    return strcmp(wlroots_hack, "0") != 0;
 
  const auto platform = SDL_GetPlatform();
  if ((platform == nullptr) || (strcmp(platform, "Linux") != 0))
    return false;
 
  const auto driver = SDL_GetCurrentVideoDriver();
  if ((driver == nullptr) || (strcmp(driver, "wayland") != 0))
    return false;
 
  /* check XDG_SESSION_DESKTOP
   *
   * if set and the value is
   * - sway
   *
   * then we need the hack.
   */
  const auto xdg_session = SDL_getenv("XDG_SESSION_DESKTOP");
  if (xdg_session != nullptr)
  {
    if (strcmp(xdg_session, "sway") == 0)
      return true;
  }
 
  /* check XDG_CURRENT_DESKTOP
   *
   * if set and the value is
   * - sway:wlroots
   *
   * then we need the hack.
   */
  const auto xdg_desktop = SDL_getenv("XDG_CURRENT_DESKTOP");
  if (xdg_desktop != nullptr)
  {
    if (strcmp(xdg_desktop, "sway:wlroots") == 0)
      return true;
  }
 
  return false;
}