SDL_SetRenderViewport - Set the drawing area for rendering on the current target.

       This function is available since SDL 3.2.0.

       Drawing  will  clip  to this area (separately from any clipping done with SDL_SetRenderClipRect), and the
       top left of the area will become coordinate (0, 0) for future drawing commands.

       The area's width and height must be >= 0.

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

renderer
              the rendering context.

       rect   the SDL_Rect structure representing the drawing area, or NULL to set the viewport  to  the  entire
              target.

       SDL_SetRenderViewport - Set the drawing area for rendering on the current target.

       for more information.

SDL_GetRenderViewport(3), SDL_RenderViewportSet(3)

Simple Directmedia Layer                           SDL 3.2.20                           SDL_SetRenderViewport(3)

#include<SDL3/SDL_render.h>boolSDL_SetRenderViewport(SDL_Renderer*renderer,constSDL_Rect*rect);

       This function should only be called on the main thread.