[英]Error during compilation of SDL test
我正在学习用SDL2编程。 目前,我正在做一个基本的练习。 我的程序加载背景图像,并在背景上加载完整的精灵表。 但是我在执行程序时遇到了问题。 当我执行二进制文件时,程序窗口会自动关闭; 我看不到任何东西。 我认为这是主循环的一个问题,但它看起来适合我。 这是我的代码
#include "SDL.h"
void main () {
int gameover = 0;
SDL_Init(SDL_INIT_VIDEO);
SDL_Window* TheWindow;
SDL_Renderer* RenderEngine;
SDL_Surface* LoadedSurface;
SDL_Surface* LoadedImage;
SDL_Texture* CharacterImg;
SDL_Texture* BackgroundImg;
TheWindow = SDL_CreateWindow("Character Test",
SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 580, SDL_WINDOW_RESIZABLE);
RenderEngine = SDL_CreateRenderer( TheWindow, -1, SDL_RENDERER_ACCELERATED);
LoadedSurface= SDL_LoadBMP("./maptest.bmp");
BackgroundImg = SDL_CreateTextureFromSurface( RenderEngine, LoadedSurface);
SDL_FreeSurface(LoadedSurface);
LoadedImage = SDL_LoadBMP("./sprite.bmp");
CharacterImg = SDL_CreateTextureFromSurface( RenderEngine, LoadedImage);
SDL_FreeSurface(LoadedImage);
SDL_Event event;
while (!gameover)
{
if (SDL_PollEvent(&event)) {
switch (event.type) {
case SDL_QUIT:
gameover = 1;
break;
case SDL_KEYDOWN:
switch (event.key.keysym.sym) {
case SDLK_ESCAPE:
case SDLK_q:
gameover = 1;
break;
}
}
break;
}
SDL_RenderClear(RenderEngine);
SDL_RenderCopy(RenderEngine, BackgroundImg, NULL, NULL);
SDL_RenderCopy(RenderEngine, CharacterImg, 120, 80);
SDL_RenderPresent(RenderEngine);
}
SDL_Quit();
}
如果发生任何 SDL_PollEvent
您的代码将退出while
-loop:
while (!gameover)
{
if (SDL_PollEvent(&event)) //Any SDL_PollEvent that gets into if...
{
switch (event.type)
{
case SDL_QUIT:
gameover = 1;
break;
case SDL_KEYDOWN:
switch (event.key.keysym.sym)
{
case SDLK_ESCAPE:
case SDLK_q:
gameover = 1;
break;
}
}
break; //...will eventually hit this break if it didn't break before
}
SDL_RenderClear(RenderEngine);
SDL_RenderCopy(RenderEngine, BackgroundImg, NULL, NULL);
SDL_RenderCopy(RenderEngine, CharacterImg, 120, 80);
SDL_RenderPresent(RenderEngine);
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.