updateSurfaceRects method

bool updateSurfaceRects(
  1. List<Rectangle<double>> rects
)

Copy areas of the window surface to the screen.

This is the function you use to reflect changes to portions of the surface on the screen.

This function is equivalent to the SDL 1.2 API SDL_UpdateRects().

Note that this function will update at least the rectangles specified, but this is only intended as an optimization; in practice, this might update more of the screen (or all of the screen!), depending on what method SDL uses to send pixels to the system.

\param window the window to update. \param rects an array of SDL_Rect structures representing areas of the surface to copy, in pixels. \param numrects the number of rectangles. \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 3.1.3.

\sa SDL_GetWindowSurface \sa SDL_UpdateWindowSurface

extern SDL_DECLSPEC bool SDLCALL SDL_UpdateWindowSurfaceRects(SDL_Window *window, const SDL_Rect *rects, int numrects)

Implementation

bool updateSurfaceRects(List<math.Rectangle<double>> rects) {
  var rectsPointer = rects.callocInt();
  var result = sdlUpdateWindowSurfaceRects(this, rectsPointer, rects.length);
  calloc.free(rectsPointer);
  return result;
}