SDL_SetRenderScale - Set the drawing scale for rendering on the current target.

       This function is available since SDL 3.2.0.

       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.

       Each render target has its own scale. This function sets the scale for the current render target.

renderer
              the rendering context.

       scaleX the horizontal scaling factor.

       scaleY the vertical scaling factor.

       SDL_SetRenderScale - Set the drawing scale for rendering on the current target.

       for more information.

SDL_GetRenderScale(3)

Simple Directmedia Layer                           SDL 3.2.20                              SDL_SetRenderScale(3)

#include<SDL3/SDL_render.h>boolSDL_SetRenderScale(SDL_Renderer*renderer,floatscaleX,floatscaleY);

       This function should only be called on the main thread.