SDL_GetRenderMetalCommandEncoder - Get the Metal command encoder for the current frame.

       This function is available since SDL 3.2.0.

       This  function  returns void*, so SDL doesn't have to include Metal's headers, but it can be safely cast
       to an id<MTLRenderCommandEncoder>.

       This will return NULL if Metal refuses to give SDL a drawable to render to, which  might  happen  if  the
       window is hidden/minimized/offscreen. This doesn't apply to command encoders for render targets, just the
       window's backbuffer. Check your return values!

renderer
              the renderer to query.

       SDL_GetRenderMetalCommandEncoder - Get the Metal command encoder for the current frame.

       Returns  an  id<MTLRenderCommandEncoder>  on  success,  or NULL if the renderer isn't a Metal renderer or
       there was an error.

SDL_GetRenderMetalLayer(3)

Simple Directmedia Layer                           SDL 3.2.20                SDL_GetRenderMetalCommandEncoder(3)

#include<SDL3/SDL_render.h>void*SDL_GetRenderMetalCommandEncoder(SDL_Renderer*renderer);

       This function should only be called on the main thread.