SDL_RenderClear - Man Page

#include <SDL3/SDL_render.h>

bool SDL_RenderClear(SDL_Renderer *renderer);

This function clears the entire rendering target, ignoring the viewport and the clip rectangle. Note, that clearing will also set/fill all pixels of the rendering target to current renderer draw color, so make sure to invoke SDL_SetRenderDrawColor() when needed.

renderer

the rendering context.

Returns true on success or false on failure; call SDL_GetError() for more information.

This function should only be called on the main thread.

This function is available since SDL 3.2.0.

SDL_SetRenderDrawColor(3)

SDL_RenderPresent(3).