sdlGetDisplayContentScale function video

double sdlGetDisplayContentScale(
  1. int displayId
)

Get the content scale of a display.

The content scale is the expected scale for content based on the DPI settings of the display. For example, a 4K display might have a 2.0 (200%) display scale, which means that the user expects UI elements to be twice as big on this display, to aid in readability.

After window creation, SDL_GetWindowDisplayScale() should be used to query the content scale factor for individual windows instead of querying the display for a window and calling this function, as the per-window content scale factor may differ from the base value of the display it is on, particularly on high-DPI and/or multi-monitor desktop configurations.

\param displayID the instance ID of the display to query. \returns the content scale of the display, or 0.0f on failure; call SDL_GetError() for more information.

\threadsafety This function should only be called on the main thread.

\since This function is available since SDL 3.2.0.

\sa SDL_GetWindowDisplayScale \sa SDL_GetDisplays

extern SDL_DECLSPEC float SDLCALL SDL_GetDisplayContentScale(SDL_DisplayID displayID)

Implementation

double sdlGetDisplayContentScale(int displayId) {
  final sdlGetDisplayContentScaleLookupFunction = _libSdl
      .lookupFunction<
        Float Function(Uint32 displayId),
        double Function(int displayId)
      >('SDL_GetDisplayContentScale');
  return sdlGetDisplayContentScaleLookupFunction(displayId);
}