linux sdl图形编程之helloworld.

dddddppppp1232025-10-17 14:03

#include <SDL2/SDL.h>

#include <SDL2/SDL_ttf.h>

int main3(int argc, char* argv[]) {

// 初始化SDL

if(SDL_Init(SDL_INIT_VIDEO) < 0) {

printf("SDL初始化失败: %s\n", SDL_GetError());

return -1;

}

// 初始化TTF字体库

if(TTF_Init() < 0) {

printf("TTF初始化失败: %s\n", TTF_GetError());

SDL_Quit();

return -1;

}

// 创建窗口

SDL_Window* window = SDL_CreateWindow("SDL Hello World",

SDL_WINDOWPOS_CENTERED,

SDL_WINDOWPOS_CENTERED,

640, 480,

SDL_WINDOW_SHOWN);

if(!window) {

printf("窗口创建失败: %s\n", SDL_GetError());

TTF_Quit();

SDL_Quit();

return -1;

}

// 创建渲染器

SDL_Renderer* renderer = SDL_CreateRenderer(window, -1,

SDL_RENDERER_ACCELERATED |

SDL_RENDERER_PRESENTVSYNC);

if(!renderer) {

printf("渲染器创建失败: %s\n", SDL_GetError());

SDL_DestroyWindow(window);

TTF_Quit();

SDL_Quit();

return -1;

}

// 加载字体

TTF_Font* font = TTF_OpenFont("/usr/share/fonts/truetype/freefont/FreeSans.ttf", 24);

if(!font) {

printf("字体加载失败: %s\n", TTF_GetError());

font = TTF_OpenFont("FreeSans.ttf", 24); // 尝试当前目录

if(!font) {

printf("备用字体加载失败\n");

SDL_DestroyRenderer(renderer);

SDL_DestroyWindow(window);

TTF_Quit();

SDL_Quit();

return -1;

}

}

// 创建文本表面

SDL_Color white = {255, 255, 255, 255};

SDL_Surface* textSurface = TTF_RenderText_Solid(font, "Hello World!", white);

if(!textSurface) {

printf("文本表面创建失败: %s\n", SDL_GetError());

TTF_CloseFont(font);

SDL_DestroyRenderer(renderer);

SDL_DestroyWindow(window);

TTF_Quit();

SDL_Quit();

return -1;

}

// 创建纹理

SDL_Texture* textTexture = SDL_CreateTextureFromSurface(renderer, textSurface);

if(!textTexture) {

printf("纹理创建失败: %s\n", SDL_GetError());

SDL_FreeSurface(textSurface);

TTF_CloseFont(font);

SDL_DestroyRenderer(renderer);

SDL_DestroyWindow(window);

TTF_Quit();

SDL_Quit();

return -1;

}

// 获取文本尺寸

int textWidth = textSurface->w;

int textHeight = textSurface->h;

SDL_FreeSurface(textSurface);

// 设置文本位置

SDL_Rect textRect = {

(640 - textWidth) / 2,

(480 - textHeight) / 2,

textWidth,

textHeight

};

// 主循环

SDL_Event event;

int quit = 0;

while(!quit) {

while(SDL_PollEvent(&event)) {

if(event.type == SDL_QUIT) {

quit = 1;

}

}

// 清屏

SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);

SDL_RenderClear(renderer);

// 渲染文本

SDL_RenderCopy(renderer, textTexture, NULL, &textRect);

// 更新屏幕

SDL_RenderPresent(renderer);

}

// 清理资源

SDL_DestroyTexture(textTexture);

TTF_CloseFont(font);

SDL_DestroyRenderer(renderer);

SDL_DestroyWindow(window);

TTF_Quit();

SDL_Quit();

return 0;

}

#include <SDL2/SDL.h>

#include <SDL2/SDL_ttf.h>

int main4() {

// 初始化

if(SDL_Init(SDL_INIT_VIDEO) < 0) {

SDL_Log("SDL初始化失败: %s", SDL_GetError());

return -1;

}

if(TTF_Init() < 0) {

SDL_Log("TTF初始化失败: %s", TTF_GetError());

SDL_Quit();

return -1;

}

// 创建窗口和主Surface

SDL_Window* window = SDL_CreateWindow("SDL Surface Demo",

SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,

640, 480, SDL_WINDOW_SHOWN);

if(!window) {

SDL_Log("窗口创建失败: %s", SDL_GetError());

TTF_Quit();

SDL_Quit();

return -1;

}

SDL_Surface* screenSurface = SDL_GetWindowSurface(window);

// 加载字体和渲染文本

TTF_Font* font = TTF_OpenFont("FreeSans.ttf", 24);

if(!font) font = TTF_OpenFont("/usr/share/fonts/truetype/freefont/FreeSans.ttf", 24);

if(font) {

SDL_Color white = {255, 255, 255};

SDL_Surface* textSurface = TTF_RenderText_Solid(font, "Hello World!", white);

if(textSurface) {

// 计算居中位置

SDL_Rect textRect = {

(screenSurface->w - textSurface->w) / 2,

(screenSurface->h - textSurface->h) / 2,

textSurface->w,

textSurface->h

};

// 主循环

SDL_Event e;

int running = 1;

while(running) {

while(SDL_PollEvent(&e)) {

if(e.type == SDL_QUIT) running = 0;

}

// 清屏（填充黑色）

SDL_FillRect(screenSurface, NULL,

SDL_MapRGB(screenSurface->format, 0, 0, 0));

// 绘制文本

SDL_BlitSurface(textSurface, NULL, screenSurface, &textRect);

SDL_UpdateWindowSurface(window);

SDL_Delay(16); // 约60FPS

}

SDL_FreeSurface(textSurface);

}

TTF_CloseFont(font);

}

// 清理资源

SDL_DestroyWindow(window);

TTF_Quit();

SDL_Quit();

return 0;

}

#include <SDL2/SDL.h>

#include <SDL2/SDL_ttf.h>

#define SCREEN_WIDTH 640

#define SCREEN_HEIGHT 480

typedef struct {

SDL_Rect rect;

SDL_Color normalColor;

SDL_Color hoverColor;

SDL_Color pressedColor;

int isPressed;

int isHovered;

} Button;

void renderButton(SDL_Renderer* renderer, Button* button) {

SDL_Color currentColor = button->normalColor;

if (button->isPressed) {

currentColor = button->pressedColor;

} else if (button->isHovered) {

currentColor = button->hoverColor;

}

SDL_SetRenderDrawColor(renderer, currentColor.r, currentColor.g, currentColor.b, 255);

SDL_RenderFillRect(renderer, &button->rect);

// 绘制边框

SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);

SDL_RenderDrawRect(renderer, &button->rect);

}

int main(int argc, char* argv[]) {

SDL_Init(SDL_INIT_VIDEO);

TTF_Init();

SDL_Window* window = SDL_CreateWindow("SDL Button Demo",

SDL_WINDOWPOS_CENTERED,

SDL_WINDOWPOS_CENTERED,

SCREEN_WIDTH, SCREEN_HEIGHT,

SDL_WINDOW_SHOWN);

SDL_Renderer* renderer = SDL_CreateRenderer(window, -1,

SDL_RENDERER_ACCELERATED);

// 创建按钮

Button myButton = {

.rect = {SCREEN_WIDTH/2 - 100, SCREEN_HEIGHT/2 - 50, 200, 100},

.normalColor = {100, 100, 200, 255},

.hoverColor = {150, 150, 250, 255},

.pressedColor = {50, 50, 150, 255},

.isPressed = 0,

.isHovered = 0

};

// 主循环

SDL_Event event;

int running = 1;

while (running) {

// 处理事件

while (SDL_PollEvent(&event)) {

switch (event.type) {

case SDL_QUIT:

running = 0;

break;

case SDL_MOUSEMOTION:

// 检测鼠标悬停

myButton.isHovered = SDL_PointInRect(

&(SDL_Point){event.motion.x, event.motion.y},

&myButton.rect

);

break;

case SDL_MOUSEBUTTONDOWN:

if (event.button.button == SDL_BUTTON_LEFT &&

SDL_PointInRect(&(SDL_Point){event.button.x, event.button.y},

&myButton.rect)) {

myButton.isPressed = 1;

}

break;

case SDL_MOUSEBUTTONUP:

if (event.button.button == SDL_BUTTON_LEFT) {

if (myButton.isPressed &&

SDL_PointInRect(&(SDL_Point){event.button.x, event.button.y},

&myButton.rect)) {

SDL_Log("Button clicked!");

}

myButton.isPressed = 0;

}

break;

}

}

// 渲染

SDL_SetRenderDrawColor(renderer, 240, 240, 240, 255);

SDL_RenderClear(renderer);

renderButton(renderer, &myButton);

SDL_RenderPresent(renderer);

SDL_Delay(16);

}

// 清理资源

SDL_DestroyRenderer(renderer);

SDL_DestroyWindow(window);

TTF_Quit();

SDL_Quit();

return 0;

}

gcc main.c -o helloworld `sdl2-config --cflags --libs` -lSDL2_ttf -lcapstone

相关推荐
LCG元8 分钟前
终极武器：用 systemd 管理你的自定义应用服务（附配置文件）
linux
别动哪条鱼33 分钟前
AVAudioFifo
数据结构·ffmpeg·音视频
脏脏a43 分钟前
【Linux】Linux进程状态深度解析
linux·运维·服务器
凉晓风44 分钟前
Linux中常见几种自启动方式的区别
linux·运维·服务器
小熊officer1 小时前
Nginx学习
运维·学习·nginx
LCG元1 小时前
考古利器：find 命令的高级用法，按时间、大小、内容精准查找
linux
ManThink Technology1 小时前
LoRaWAN网关：连接私有服务器是“可行”还是“明智”？
运维·服务器
U***74692 小时前
Linux（CentOS）安装 MySQL
linux·mysql·centos
3***g2052 小时前
Linux系统离线部署MySQL详细教程（带每步骤图文教程）
linux·mysql·adb
J***Q2922 小时前
DevOps金融服务安全要求
运维·安全·devops
热门推荐
01GitHub 镜像站点02【保姆级教程】免费使用Gemini3的5种方法！免翻墙/国内直连03BongoCat - 跨平台键盘猫动画工具04UV安装并设置国内源05安娜的档案(Anna’s Archive) 镜像网站/国内最新可访问入口（持续更新）06Linux下V2Ray安装配置指南07Google Antigravity：无法登录？早期错误、登录修复和用户反馈指南08Labelme从安装到标注：零基础完整指南09全球最强模型Grok4，国内已可免费使用！（附教程）1046个Nano-banana 精选提示词，持续更新中