如何在 SDL 2.0 中绘制矩形轮廓 [英] How to draw a rectangle outline in SDL 2.0

问题描述

我正在尝试在 SDL 2.0 中绘制矩形轮廓以用作选择框.有谁知道如何在 SDL 2.0 中制作一个?

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?

推荐答案

您正在寻找 SDL_RenderDrawRect:

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

典型用法是:

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

//Set Color of Rect with SDL_SetRenderDrawColor if needed

SDL_RenderDrawRect(renderer, &rectToDraw);

要绘制一个填充矩形，然后使用 SDL_RenderFillRect

To draw a filled rect it would then be with SDL_RenderFillRect

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