[hatari-devel] use of SDL_RenderClear with SDL2

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Hi

in the wrapper functions SDL_UpdateRects used only for SDL2, I see :

SDL_UpdateTexture(sdlTexture, NULL, screen->pixels, screen->pitch);
SDL_RenderClear(sdlRenderer);
SDL_RenderCopy(sdlRenderer, sdlTexture, NULL, NULL);
SDL_RenderPresent(sdlRenderer);

Why is there a call to SDL_RenderClear since we copy the texture on 
screen anyway just after ?

At least, if I comment SDL_RenderClear I still get correct results on 
screen. Maybe it's just to clear some parts of the screen near border 
and status bar, but isn't it too much to clear the whole screen on each 
frame ?

Or am I missing something ?

Nicolas