[技术]

【飞凌RK3588开发板试用】基于SDL进行GUI程序开发

jf_1137202360

2023-4-6 15:30:30 6046 RK3588 飞凌嵌入式

0 转自 https://mp.weixin.qq.com/s/98y0wFHm8JAZRVhUiIeyMw 欢迎关注公众号。前言前几篇我们体验了使用ffmpeg进行多媒体开发，本篇使用SDL来进行GUI相关的应用开发。通过加载位图显示的Demo来演示。构建下载源码 https://github.com/libsdl-org/SDL/releases/ https://github.com/libsdl-org/SDL/releases/download/release-2.26.4/SDL2-2.26.4.tar.gz 解压 tar -xvf SDL2-2.26.4.tar.gz 进入工作目录 cd SDL2-2.26.4/ 创建目录 mkdir build 配置 ./configure --prefix=$PWD/build 构建安装 make && make install 编译完如下: Build下生成4个文件夹 bin share lib include 生成的库文件位于build/lib 头文件位于build/include/SDL2/ 测试 vi /etc/profile 添加 export C_INCLUDE_PATH=/root/SDL2-2.26.4/build/include/SDL2:$C_INCLUDE_PATH export LIBRARY_PATH=/root/SDL2-2.26.4/build/lib:$LIBRARY_PATH export LD_LIBRARY_PATH=/root/SDL2-2.26.4/build/lib:$LD_LIBRARY_PATH source /etc/profile 创建源文件内容如下 sdltest.c #include #include int main(int argc, char* argv[]) { /* 初始化SDL / if(SDL_Init(SDL_INIT_VIDEO) != 0) { printf("SDL_Init Error %s.n", SDL_GetError()); return 1; } / 打开窗口 / SDL_Window win = SDL_CreateWindow("Hello World", 100, 100, 640, 480, SDL_WINDOW_SHOWN); if(win == NULL) { printf("SDL_CreateWindow Error %s.n",SDL_GetError()); SDL_Quit(); return 1; } /* 创建渲染器 / SDL_Renderer ren = SDL_CreateRenderer(win , -1, SDL_RENDERER_SOFTWARE); if(ren == NULL) { SDL_DestroyWindow(win); printf("SDL_CreateRenderer Error %s.n",SDL_GetError()); SDL_Quit(); return 1; } /* 加载位图图像 / SDL_Surface bmp = SDL_LoadBMP("hello.bmp"); if(bmp == NULL) { SDL_DestroyRenderer(ren); SDL_DestroyWindow(win); printf("SDL_LoadBMP Error %s.n",SDL_GetError()); SDL_Quit(); return 1; } SDL_Texture tex = SDL_CreateTextureFromSurface(ren, bmp); SDL_FreeSurface(bmp); if (tex == NULL) { SDL_DestroyRenderer(ren); SDL_DestroyWindow(win); printf("SDL_CreateTextureFromSurface Error %s.n",SDL_GetError()); SDL_Quit(); return 1; } //A sleepy rendering loop, wait for 3 seconds and render and present the screen each time for (int i = 0; i < 3; ++i) { //First clear the renderer SDL_RenderClear(ren); //Draw the texture SDL_RenderCopy(ren, tex, NULL, NULL); //Update the screen SDL_RenderPresent(ren); //Take a quick break after all that hard work SDL_Delay(1000); } SDL_DestroyTexture(tex); SDL_DestroyRenderer(ren); SDL_DestroyWindow(win); SDL_Quit(); return 0; } 复制代码* 编译 gcc sdltest.c -o sdltest -lSDL2 运行导入测试文件hello.bmp 如下运行 ./sdltest 可以看到加载显示了位图总结从以上可以看出，直接在开发板构建SDL，并进行应用编译开发，非常方便。所以使用本开发板可以任意选择各种技术栈进行开发，在进行多媒体终端开发时也有多种选择，非常方便，这得益于开发板运行完整的ubuntu系统和强劲的性能。 0
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