How to draw a rectangle outline in SDL 2.0

问题

I'm trying to draw a rectangle outline in SDL 2.0 in order to use as a selection box. Does anyone know how to make one in SDL 2.0?

回答1:

You are looking for the SDL_RenderDrawRect:

int SDL_RenderDrawRect(SDL_Renderer*   renderer,
                   const SDL_Rect* rect);

Typical usage would be:

SDL_Rect rectToDraw = {100,100,100,100} // Just some random rect

//Set Color of Rect with SDL_SetRenderDrawColor if needed

SDL_RenderDrawRect(renderer, &rectToDraw);

To draw a filled rect it would then be with SDL_RenderFillRect

来源：https://stackoverflow.com/questions/20072639/how-to-draw-a-rectangle-outline-in-sdl-2-0