SDL2笔记01_搭建开发环境和编写helloworld

1. 开发环境为Clion，和SDL2.0

   • 去官网http://www.libsdl.org/download-2.0.php下载SDL2-devel-2.0.14-mingw.tar.gz
     

   • 将SDL2-devel-2.0.14-mingw.tar.gz解压到目录G:/Xubuntu_Work_Space/From_Xubuntu/codeTest_2019_2_21/SDL2/win/SDL2-devel-2.0.14-mingw/SDL2-2.0.14/x86_64-w64-mingw32

2. 网上有大佬翻译了教程
   http://adolfans.github.io/sdltutorialcn/blog/2013/01/25/sdl-2-dot-0-tutorial-index/连接

3. 在Clion新建c++工程

   • 在cmakelists.txt里添加如下代码

        cmake_minimum_required(VERSION 3.19)
        project(main)
        set(SDL2_DIR G:/Xubuntu_Work_Space/From_Xubuntu/codeTest_2019_2_21/SDL2/win/SDL2-devel-2.0.14-mingw/SDL2-2.0.14/x86_64-w64-mingw32)
     
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -lmingw32")
        set(CMAKE_EXE_LINKER_FLAGS "-static-libgcc -static-libstdc++")
     
        include_directories(${SDL2_DIR}/include)
        link_directories(${SDL2_DIR}/lib)
     
        set(SOURCE_FILES main.cpp)
        add_executable(main ${SOURCE_FILES})
     
        target_link_libraries(main mingw32 SDL2main SDL2)
     
     

4. 在main.cpp编写helloworld，并且准备一张hello.bmp

        #include "SDL2/SDL.h"
   
        int main(int argc, char** argv) {
   
            SDL_Init(SDL_INIT_EVERYTHING);
   
            SDL_Window *sdlWindow = SDL_CreateWindow("你好", 0, 0, 400, 320, SDL_WINDOW_SHOWN);
            // SDL_Randerer渲染器要和window绑定
            SDL_Renderer *sdlRenderer = SDL_CreateRenderer(sdlWindow, -1, /*-1让系统自动选一个显卡驱动*/
                                                           SDL_RENDERER_ACCELERATED /*启用硬件加速*/
                                                           | SDL_RENDERER_PRESENTVSYNC /*使用显示器的刷新率*/);
            // SDL_Surface是表面，使用CPU
            SDL_Surface *sdlSurface = SDL_LoadBMP("C:\Users\majiao\Desktop\hello.bmp");
   
            // 用SDL_Texture来GPU加速
            SDL_Texture *sdlTexture = SDL_CreateTextureFromSurface(sdlRenderer, sdlSurface);
            SDL_FreeSurface(sdlSurface);
   
            SDL_RenderClear(sdlRenderer);
            SDL_RenderCopy(sdlRenderer, sdlTexture,
                           NULL, /*绘制整个原图像, 并把它画在屏幕上（0，0 ）的位置*/
                           NULL  /*拉伸这个图像让它填满整个窗口*/);
            // 发送给GPU
            SDL_RenderPresent(sdlRenderer);
   
            SDL_Delay(60000);
   
            return 0;
        }
   
   

5. 编译后把SDL2.dll和main.exe放到同级目录（windows会优先找同级目录的dll）,并运行，于是得到