SDL2系列教程： Beginning Game Programming v2.0
跟著教程Hello SDL: Your First Graphics Window嘗試繪制一個窗口蔗蹋。代碼如下
/*This source code copyrighted by Lazy Foo' Productions (2004-2020)
and may not be redistributed without written permission.*/
//Using SDL and standard IO
#include <SDL.h>
#include <stdio.h>
//Screen dimension constants
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
int main( int argc, char* args[] )
{
//The window we'll be rendering to
SDL_Window* window = NULL;
//The surface contained by the window
SDL_Surface* screenSurface = NULL;
//Initialize SDL
if( SDL_Init( SDL_INIT_VIDEO ) < 0 )
{
printf( "SDL could not initialize! SDL_Error: %s\n", SDL_GetError() );
}
else
{
//Create window
window = SDL_CreateWindow( "SDL Tutorial", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN );
if( window == NULL )
{
printf( "Window could not be created! SDL_Error: %s\n", SDL_GetError() );
}
else
{
//Get window surface
screenSurface = SDL_GetWindowSurface( window );
//Fill the surface white
SDL_FillRect( screenSurface, NULL, SDL_MapRGB( screenSurface->format, 0xFF, 0xFF, 0xFF ) );
//Update the surface
SDL_UpdateWindowSurface( window );
//Wait two seconds
SDL_Delay( 2000 );
}
}
//Destroy window
SDL_DestroyWindow( window );
//Quit SDL subsystems
SDL_Quit();
return 0;
}
編譯執(zhí)行
clang -g 01_hello_SDL.cpp `pkg-config --libs --cflags sdl2`
./a.out
沒有錯誤秋度，也沒有窗口展示，為啥呢
后來參考：SDL_Window在macOS中未以窗口模式顯示
修改
//Wait two seconds
SDL_Delay( 2000 );
為
bool quit = false;
SDL_Event e;
while (!quit) {
while (SDL_PollEvent(&e)) {
if (e.type == SDL_QUIT) {
quit = true;
}
}
}
重新編譯運行，窗口出現了
image.png
