SDL教程第一和第二个视频的笔记

#include <stdio.h>
#include <stdlib.h>
#include <SDL.h>
#include <SDL_image.h>

int main(int argc, char *argv[])
{
    SDL_Init(SDL_INIT_VIDEO); 
    {
        SDL_Window * window = SDL_CreateWindow("First Window Program",   //标题
                                            SDL_WINDOWPOS_UNDEFINED, //窗口距离屏幕左边的长度
                                            SDL_WINDOWPOS_UNDEFINED,  //窗口距离屏幕上边的长度
                                            800,600,  // width  ,height
                                            SDL_WINDOW_SHOWN );

        SDL_Rect rect;
        
        
        int i;
        SDL_Surface *surface = SDL_GetWindowSurface(window);
        //SDL_Surface *image = SDL_LoadBMP("sample.bmp");
        SDL_Surface *image = IMG_Load("peo.png");
        rect.x = 0;
        rect.y = 0;
        
        for (i=1; i<=3; i++){
        SDL_BlitSurface(image,   //要贴的图片
                        NULL,   //拷贝矩形的高度和宽度由这个参数确定 
                        surface, //贴在哪个的表面
                        &rect);  //图片和窗口左上角的相对距离
        rect.x += 200;
        }
        
        SDL_UpdateWindowSurface(window);
    
        
    SDL_Delay(5000); //让窗口存在多久
    
    SDL_FreeSurface(surface);
    SDL_FreeSurface(image);
    SDL_DestroyWindow(window);
    SDL_Quit();
    }
    return 0;
}