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windows: Add property mapping displayID to HMONITOR. #14494

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Merged
slouken merged 2 commits into from
Nov 21, 2025
Merged

windows: Add property mapping displayID to HMONITOR. #14494

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4797fba
windows: Add property mapping displayID to HMONITOR.
madewokherd Nov 20, 2025
7ffb812
Fixed setting the monitor handle in the moved monitor case
slouken Nov 21, 2025
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6 changes: 6 additions & 0 deletions include/SDL3/SDL_video.h
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Original file line number Diff line number Diff line change
Expand Up @@ -665,6 +665,11 @@ extern SDL_DECLSPEC SDL_DisplayID SDLCALL SDL_GetPrimaryDisplay(void);
* - `SDL_PROP_DISPLAY_WAYLAND_WL_OUTPUT_POINTER`: the wl_output associated
* with the display
*
* On Windows:
*
* - `SDL_PROP_DISPLAY_WINDOWS_HMONITOR_POINTER`: the monitor handle (HMONITOR)
* associated with the display
*
* \param displayID the instance ID of the display to query.
* \returns a valid property ID on success or 0 on failure; call
* SDL_GetError() for more information.
Expand All @@ -678,6 +683,7 @@ extern SDL_DECLSPEC SDL_PropertiesID SDLCALL SDL_GetDisplayProperties(SDL_Displa
#define SDL_PROP_DISPLAY_HDR_ENABLED_BOOLEAN "SDL.display.HDR_enabled"
#define SDL_PROP_DISPLAY_KMSDRM_PANEL_ORIENTATION_NUMBER "SDL.display.KMSDRM.panel_orientation"
#define SDL_PROP_DISPLAY_WAYLAND_WL_OUTPUT_POINTER "SDL.display.wayland.wl_output"
#define SDL_PROP_DISPLAY_WINDOWS_HMONITOR_POINTER "SDL.display.windows.hmonitor"

/**
* Get the name of a display in UTF-8 encoding.
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6 changes: 6 additions & 0 deletions src/video/windows/SDL_windowsmodes.c
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Expand Up @@ -605,6 +605,9 @@ static void WIN_AddDisplay(SDL_VideoDevice *_this, HMONITOR hMonitor, const MONI
internal->MonitorHandle = hMonitor;
internal->state = DisplayUnchanged;

SDL_PropertiesID props = SDL_GetDisplayProperties(_this->displays[i]->id);
SDL_SetPointerProperty(props, SDL_PROP_DISPLAY_WINDOWS_HMONITOR_POINTER, hMonitor);

if (!_this->setting_display_mode) {
SDL_VideoDisplay *existing_display = _this->displays[i];
SDL_Rect bounds;
Expand Down Expand Up @@ -665,6 +668,9 @@ static void WIN_AddDisplay(SDL_VideoDevice *_this, HMONITOR hMonitor, const MONI
if (SDL_AddVideoDisplay(&display, false)) {
// The mode is owned by the video subsystem
mode.internal = NULL;

SDL_PropertiesID props = SDL_GetDisplayProperties(display.id);
SDL_SetPointerProperty(props, SDL_PROP_DISPLAY_WINDOWS_HMONITOR_POINTER, hMonitor);
} else {
SDL_free(displaydata);
}
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