在QT5中使用SDL2显示bmp图片

#include <iostream> #include "../include/SDL.h" #undef main using namespace std; const int SCREEN_WIDTH = 640; const int SCREEN_HEIGHT = 480; int main() { //The window we'll be rendering to SDL_Window* gWindow = NULL; //The surface contained by the window SDL_Surface* gScreenSurface = NULL; //The image we will load and show on the screen SDL_Surface* gHelloWorld = NULL; //首先初始化 初始化SD视频子系统 if(SDL_Init(SDL_INIT_VIDEO)<0) { printf( "Window could not be created! SDL_Error: %s\n", SDL_GetError() ); return false; } //创建窗口 gWindow=SDL_CreateWindow("SHOW BMP",//窗口标题 SDL_WINDOWPOS_UNDEFINED,//窗口位置设置 SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH,//窗口的宽度 SCREEN_HEIGHT,//窗口的高度 SDL_WINDOW_SHOWN//显示窗口 ); if(gWindow==NULL) { printf( "Window could not be created! SDL_Error: %s\n", SDL_GetError() ); return false; } //Use this function to get the SDL surface associated with the window. //获取窗口对应的surface gScreenSurface=SDL_GetWindowSurface(gWindow); //加载图片 gHelloWorld = SDL_LoadBMP("../Hello_World.bmp");//加载图片 if( gHelloWorld == NULL ) { printf( "Unable to load image %s! SDL Error: %s\n", "Hello_World.bmp", SDL_GetError() ); return false; } //Use this function to perform a fast surface copy to a destination surface. //surface的快速复制 //下面函数的参数分别为： SDL_Surface* src ,const SDL_Rect* srcrect , SDL_Surface* dst , SDL_Rect* dstrect SDL_BlitSurface( gHelloWorld , NULL , gScreenSurface , NULL); SDL_UpdateWindowSurface(gWindow);//更新显示copy the window surface to the screen SDL_Delay(2000);//延时2000毫秒 //释放内存 SDL_FreeSurface( gHelloWorld );//释放空间 gHelloWorld = NULL; SDL_DestroyWindow(gWindow);//销毁窗口 gWindow = NULL ; SDL_Quit();//退出SDL return 0; }