SDL在win上安装

DarkH / 2024-04-23 / 原文

官网：https://www.libsdl.org/

1.下载安装包

下载安装包 SDL2-devel-2.30.2-VC.zip，然后解压到指定目录

此时就安装完了。简简单单。

2.编码使用demo

编写CMakeLists.txt

cmake_minimum_required(VERSION 3.28)
project(sdltest01)

set(CMAKE_CXX_STANDARD 20)

set(CMAKE_PREFIX_PATH "C:/Users/Dark/SDL2-2.30.2/")

find_package(SDL2 REQUIRED)

add_executable(${PROJECT_NAME} main.cpp)

target_include_directories(${PROJECT_NAME} PRIVATE ${SDL2_INCLUDE_DIRS})

target_link_libraries(${PROJECT_NAME} PRIVATE ${SDL2_LIBRARIES})

编写main.cpp

#include <iostream>

#include <SDL.h>

#undef main
int main()
{
    int run = 1;
    SDL_Window *window = NULL;
    SDL_Renderer *renderer = NULL;
    SDL_Texture *texture = NULL;
    SDL_Rect rect; // 长方形，原点在左上角
    rect.w = 50;    //方块大小
    rect.h = 50;

    SDL_Init(SDL_INIT_VIDEO);//初始化函数,可以确定希望激活的子系统

    window = SDL_CreateWindow("2 Window",
                              SDL_WINDOWPOS_UNDEFINED,
                              SDL_WINDOWPOS_UNDEFINED,
                              640,
                              480,
                              SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);// 创建窗口

    if (!window)
    {
        return -1;
    }
    renderer = SDL_CreateRenderer(window, -1, 0);//基于窗口创建渲染器
    if (!renderer)
    {
        return -1;
    }

    texture = SDL_CreateTexture(renderer,
                                SDL_PIXELFORMAT_RGBA8888,
                                SDL_TEXTUREACCESS_TARGET,
                                640,
                                480); //创建纹理

    if (!texture)
    {
        return -1;
    }

    int show_count = 0;
    while (run)
    {
        rect.x = rand() % 600;
        rect.y = rand() % 400;

        SDL_SetRenderTarget(renderer, texture); // 设置渲染目标为纹理
        SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255); // 纹理背景为红色
        SDL_RenderClear(renderer); //清屏

        SDL_RenderDrawRect(renderer, &rect); //绘制一个长方形
        SDL_SetRenderDrawColor(renderer, 0, 255, 255, 255); //长方形为青色
        SDL_RenderFillRect(renderer, &rect);

        SDL_SetRenderTarget(renderer, NULL); //恢复默认，渲染目标为窗口
        SDL_RenderCopy(renderer, texture, NULL, NULL); //拷贝纹理到CPU

        SDL_RenderPresent(renderer); //输出到目标窗口上
        SDL_Delay(300);
        if(show_count++ > 30)
        {
            run = 0;        // 不跑了
        }
    }

    SDL_DestroyTexture(texture);
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window); //销毁窗口
    SDL_Quit();
    return 0;
}

运行时自己把SDL安装路径下的lib下的对应的库，拷贝到exe目录下

运行结果会弹个框框出来，然后有个正方形在那里动来动去，然后就自动关闭框框。