C 语言代码示例,展示如何实现一个简单的图形化用户界面(GUI)游戏,使用了图形库 SDL(Simple DirectMedia Layer)和 SDL_image:
代码语言:javascript复制#include <stdio.h>
#include <stdlib.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
// 屏幕宽度和高度
const int SCREEN_WIDTH = 800;
const int SCREEN_HEIGHT = 600;
// 初始化 SDL,创建窗口和渲染器
void initSDL(SDL_Window** window, SDL_Renderer** renderer) {
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Init failed: %s", SDL_GetError());
exit(EXIT_FAILURE);
}
*window = SDL_CreateWindow("Game", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
if (*window == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_CreateWindow failed: %s", SDL_GetError());
exit(EXIT_FAILURE);
}
*renderer = SDL_CreateRenderer(*window, -1, SDL_RENDERER_ACCELERATED);
if (*renderer == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_CreateRenderer failed: %s", SDL_GetError());
exit(EXIT_FAILURE);
}
SDL_SetRenderDrawColor(*renderer, 0xFF, 0xFF, 0xFF, 0xFF);
SDL_RenderClear(*renderer);
SDL_RenderPresent(*renderer);
}
// 释放资源,关闭 SDL
void closeSDL(SDL_Window* window, SDL_Renderer* renderer) {
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
}
int main() {
SDL_Window* window = NULL;
SDL_Renderer* renderer = NULL;
initSDL(&window, &renderer);
// 加载游戏背景
SDL_Srface* backgroundSrface = IMG_Load("background.png");
if (backgroundSrface == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "IMG_Load failed: %s", IMG_GetError());
closeSDL(window, renderer);
exit(EXIT_FAILURE);
}
SDL_Texture* backgroundTexture = SDL_CreateTextureFromSrface(renderer, backgroundSrface);
if (backgroundTexture == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_CreateTextureFromSrface failed: %s", SDL_GetError());
SDL_FreeSrface(backgroundSrface);
closeSDL(window, renderer);
exit(EXIT_FAILURE);
}
SDL_FreeSrface(backgroundSrface);
// 游戏循环
SDL_Event e;
int quit = 0;
while (!quit) {
while (SDL_PollEvent(&e) != 0) {
if (e.type == SDL_QUIT) {
quit = 1;
}
}
// 渲染背景
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, backgroundTexture, NULL, NULL);
SDL_RenderPresent(renderer);
}
// 释放资源,关闭 SDL
SDL_DestroyTexture(backgroundTexture);
closeSDL(window, renderer);
return 0;
}
使用 SDL 和 SDL_image 库来创建一个简单的图形化界面游戏。定义了以下函数:
initSDL
:用于初始化 SDL,创建窗口和渲染器。closeSDL
:用于释放资源,关闭 SDL。main
函数中,我们先调用initSDL
进行初始化。然后,我们加载游戏背景图片,并创建相应的纹理和表面。接下来,我们进入游戏循环,不断渲染背景,并监听 SDL_QUIT 事件以判断是否退出游戏。最后,我们释放资源,并调用closeSDL
关闭 SDL。