sdlxRenderCoordinatesToWindow function render

({double windowX, double windowY})? sdlxRenderCoordinatesToWindow(Pointer<SdlRenderer> renderer, double x, double y)

Get a point in window coordinates when given a point in render coordinates.

This takes into account several states:

• The window dimensions.
• The logical presentation settings (SDL_SetRenderLogicalPresentation)
• The scale (SDL_SetRenderScale)
• The viewport (SDL_SetRenderViewport)

\param renderer the rendering context. \param x the x coordinate in render coordinates. \param y the y coordinate in render coordinates. \param window_x a pointer filled with the x coordinate in window coordinates. \param window_y a pointer filled with the y coordinate in window coordinates. \returns true on success or false 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_SetRenderLogicalPresentation \sa SDL_SetRenderScale \sa SDL_SetRenderViewport

extern SDL_DECLSPEC bool SDLCALL SDL_RenderCoordinatesToWindow(SDL_Renderer *renderer, float x, float y, float *window_x, float *window_y)

See also:

• SDL_RenderCoordinatesToWindow - SDL3 Wiki

Implementation

({double windowX, double windowY})? sdlxRenderCoordinatesToWindow(
  Pointer<SdlRenderer> renderer,
  double x,
  double y,
) {
  var windowX = 0.0;
  var windowY = 0.0;
  final windowXPointer = calloc<Float>();
  final windowYPointer = calloc<Float>();
  final result = sdlRenderCoordinatesToWindow(
    renderer,
    x,
    y,
    windowXPointer,
    windowYPointer,
  );
  if (result) {
    windowX = windowXPointer.value;
    windowY = windowYPointer.value;
  }
  windowXPointer.callocFree();
  windowYPointer.callocFree();
  if (!result) {
    return null;
  }
  return (windowX: windowX, windowY: windowY);
}