sdlSetRenderScale function

bool sdlSetRenderScale(
  1. Pointer<SdlRenderer> renderer,
  2. double scaleX,
  3. double scaleY
)

Set the drawing scale for rendering on the current target.

The drawing coordinates are scaled by the x/y scaling factors before they are used by the renderer. This allows resolution independent drawing with a single coordinate system.

If this results in scaling or subpixel drawing by the rendering backend, it will be handled using the appropriate quality hints. For best results use integer scaling factors.

\param renderer the rendering context. \param scaleX the horizontal scaling factor. \param scaleY the vertical scaling factor. \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_GetRenderScale

extern SDL_DECLSPEC bool SDLCALL SDL_SetRenderScale(SDL_Renderer *renderer, float scaleX, float scaleY)

Implementation

bool sdlSetRenderScale(
    Pointer<SdlRenderer> renderer, double scaleX, double scaleY) {
  final sdlSetRenderScaleLookupFunction = libSdl3.lookupFunction<
      Uint8 Function(Pointer<SdlRenderer> renderer, Float scaleX, Float scaleY),
      int Function(Pointer<SdlRenderer> renderer, double scaleX,
          double scaleY)>('SDL_SetRenderScale');
  return sdlSetRenderScaleLookupFunction(renderer, scaleX, scaleY) == 1;
}