SDL2的使用 | Linux系统下的编译与安装、使用
目录
1.系统环境：ubuntu 16.04 64位
2.SDL2介绍
3.下载
4.编译、安装
5.设置环境变量
6.测试SDL
7.参考
1.系统环境：ubuntu 16.04 64位
Linux fly-vm 4.15.0-142-generic #146~16.04.1-Ubuntu SMP Tue Apr 13 09:27:15 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
2.SDL2介绍
Simple DirectMedia Layer 是一个跨平台开发库，旨在通过 OpenGL 和 Direct3D 提供对音频、键盘、鼠标、游戏杆和图形硬件的低级访问。它被视频播放软件、模拟器和流行游戏使用，包括Valve的获奖目录和许多Humble Bundle游戏。
SDL 正式支持 Windows、Mac OS X、Linux、iOS 和 Android。可以在源代码中找到对其他平台的支持。
SDL 是用 C 编写的，在本机上与 C++ 一起使用，并且有适用于其他几种语言的绑定，包括 C# 和 Python。
SDL 2.0 在zlib 许可下分发。此许可证允许您在任何软件中自由使用 SDL。
3.下载
官网地址：Simple DirectMedia Layer - Homepage
源码下载地址（SDL version 2.0.14）：https://www.libsdl.org/release/SDL2-2.0.14.tar.gz
4.编译、安装
fly@fly-vm:~/workSpace/SDL2$tar -zxvf SDL2-2.0.14.tar.gz
fly@fly-vm:~/workSpace/SDL2$cd SDL2-2.0.14/
fly@fly-vm:~/workSpace/SDL2/SDL2-2.0.14$./configure --prefix=$PWD/_instal
fly@fly-vm:~/workSpace/SDL2/SDL2-2.0.14$make && make install
fly@fly-vm:~/workSpace/SDL2/SDL2-2.0.14$cd _install/
fly@fly-vm:~/workSpace/SDL2/SDL2-2.0.14/_install$ ls
bin include lib share
fly@fly-vm:~/workSpace/SDL2/SDL2-2.0.14/_install$ tree
.
├── bin
│ └── sdl2-config
├── include
│ └── SDL2
│ ├── begin_code.h
│ ├── close_code.h
│ ├── SDL_assert.h
│ ├── SDL_atomic.h
│ ├── SDL_audio.h
│ ├── SDL_bits.h
│ ├── SDL_blendmode.h
│ ├── SDL_clipboard.h
│ ├── SDL_config.h
│ ├── SDL_cpuinfo.h
│ ├── SDL_egl.h
│ ├── SDL_endian.h
│ ├── SDL_error.h
│ ├── SDL_events.h
│ ├── SDL_filesystem.h
│ ├── SDL_gamecontroller.h
│ ├── SDL_gesture.h
│ ├── SDL.h
│ ├── SDL_haptic.h
│ ├── SDL_hints.h
│ ├── SDL_joystick.h
│ ├── SDL_keyboard.h
│ ├── SDL_keycode.h
│ ├── SDL_loadso.h
│ ├── SDL_locale.h
│ ├── SDL_log.h
│ ├── SDL_main.h
│ ├── SDL_messagebox.h
│ ├── SDL_metal.h
│ ├── SDL_misc.h
│ ├── SDL_mouse.h
│ ├── SDL_mutex.h
│ ├── SDL_name.h
│ ├── SDL_opengles2_gl2ext.h
│ ├── SDL_opengles2_gl2.h
│ ├── SDL_opengles2_gl2platform.h
│ ├── SDL_opengles2.h
│ ├── SDL_opengles2_khrplatform.h
│ ├── SDL_opengles.h
│ ├── SDL_opengl_glext.h
│ ├── SDL_opengl.h
│ ├── SDL_pixels.h
│ ├── SDL_platform.h
│ ├── SDL_power.h
│ ├── SDL_quit.h
│ ├── SDL_rect.h
│ ├── SDL_render.h
│ ├── SDL_revision.h
│ ├── SDL_rwops.h
│ ├── SDL_scancode.h
│ ├── SDL_sensor.h
│ ├── SDL_shape.h
│ ├── SDL_stdinc.h
│ ├── SDL_surface.h
│ ├── SDL_system.h
│ ├── SDL_syswm.h
│ ├── SDL_test_assert.h
│ ├── SDL_test_common.h
│ ├── SDL_test_compare.h
│ ├── SDL_test_crc32.h
│ ├── SDL_test_font.h
│ ├── SDL_test_fuzzer.h
│ ├── SDL_test.h
│ ├── SDL_test_harness.h
│ ├── SDL_test_images.h
│ ├── SDL_test_log.h
│ ├── SDL_test_md5.h
│ ├── SDL_test_memory.h
│ ├── SDL_test_random.h
│ ├── SDL_thread.h
│ ├── SDL_timer.h
│ ├── SDL_touch.h
│ ├── SDL_types.h
│ ├── SDL_version.h
│ ├── SDL_video.h
│ └── SDL_vulkan.h
├── lib
│ ├── cmake
│ │ └── SDL2
│ │ ├── sdl2-config.cmake
│ │ └── sdl2-config-version.cmake
│ ├── libSDL2-2.0.so.0 -> libSDL2-2.0.so.0.14.0
│ ├── libSDL2-2.0.so.0.14.0
│ ├── libSDL2.a
│ ├── libSDL2.la
│ ├── libSDL2main.a
│ ├── libSDL2main.la
│ ├── libSDL2.so -> libSDL2-2.0.so.0.14.0
│ ├── libSDL2_test.a
│ ├── libSDL2_test.la
│ └── pkgconfig
│ └── sdl2.pc
└── share└── aclocal└── sdl2.m49 directories, 90 files
5.设置环境变量
pc（package configure）是包（库）配置文件，保存在PKG_CONFIG_PATH=/usr/gpephone//lib/pkgconfig::/usr/lib/pkgconfig。pc文件保存了该库的头文件、库所在的路径信息。GCC等编译器编译时，比如编译某个工程用到glib-2.0这个库，pkg-config会按照PKG_CONFIG_PATH中的路径进行搜索glib-2.0.pc，然后把lib-2.0.pc作为参数传给GCC，那么GCC就可以找到该库了。
需要重新设置 PKG_CONFIG_PATH 和LD_LIBRARY_PATH 环境变量
在/etc/profile文件中加入：
export PATH=$PATH:/home/fly/workSpace/SDL2/SDL2-2.0.14/_install/lib
export PATH=$PATH:/home/fly/workSpace/SDL2/SDL2-2.0.14/_install/bin
export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/home/fly/workSpace/SDL2/SDL2-2.0.14/_install/lib/pkgconfig"# 使环境变量生效
source /etc/profile#### Makefile创建软链接的命令
.PHONY:all link unlink mk_cmake_dir link_bin link_pc link_m4 link_cmakeSRCDIRS = $(PWD)
DSTDIRS = /usr
MKDIR = mkdir -p
RM = rm -rfFILE_BIN = sdl2-config
FILE_M4 = sdl2.m4
FILE_PC = sdl2.pc
DIR_CMAKE = lib/cmake/SDL2all:link link_bin link_pc link_m4 link_cmakemk_cmake_dir:sudo $(MKDIR) /usr/lib/cmake### 在/usr/include/目录下为SDL2创建头文件目录软链接
### 在/usr/lib目录下，为SDL2链接库创建软链接
link:@echo ">>>>make links for the files of include && lib. <<<<"sudo ln -s $(SRCDIRS)/include/SDL2/ $(DSTDIRS)/include/SDL2sudo ln -s $(SRCDIRS)/lib/libSDL2-2.0.so.0.14.0 $(DSTDIRS)/lib/libSDL2-2.0.so.0sudo ln -s $(SRCDIRS)/lib/libSDL2-2.0.so.0.14.0 $(DSTDIRS)/lib/libSDL2-2.0.so.0.14.0sudo ln -s $(SRCDIRS)/lib/libSDL2.a $(DSTDIRS)/lib/libSDL2.asudo ln -s $(SRCDIRS)/lib/libSDL2.la $(DSTDIRS)/lib/libSDL2.lasudo ln -s $(SRCDIRS)/lib/libSDL2main.a $(DSTDIRS)/lib/libSDL2main.asudo ln -s $(SRCDIRS)/lib/libSDL2main.la $(DSTDIRS)/lib/libSDL2main.lasudo ln -s $(SRCDIRS)/lib/libSDL2-2.0.so.0.14.0 $(DSTDIRS)/lib/libSDL2.sosudo ln -s $(SRCDIRS)/lib/libSDL2_test.a $(DSTDIRS)/lib/libSDL2_test.asudo ln -s $(SRCDIRS)/lib/libSDL2_test.la $(DSTDIRS)/lib/libSDL2_test.lalink_bin:@echo ">>>>make links for the files of bin. <<<<"sudo ln -s $(SRCDIRS)/bin/sdl2-config $(DSTDIRS)/bin/sdl2-configlink_pc:@echo ">>>>make links for the files of pc. <<<<"sudo ln -s $(SRCDIRS)/lib/pkgconfig/sdl2.pc $(DSTDIRS)/lib/pkgconfig/sdl2.pclink_m4:@echo ">>>>make links for the files of m4. <<<<"sudo ln -s $(SRCDIRS)/share/aclocal/sdl2.m4 $(DSTDIRS)/share/aclocal/sdl2.m4link_cmake: mk_cmake_dir@echo ">>>>make links for the files of cmake. <<<<"sudo ln -s $(SRCDIRS)/lib/cmake/SDL2 $(DSTDIRS)/lib/cmake/SDL2unlink:sudo $(RM) $(DSTDIRS)/include/SDL2sudo $(RM) $(DSTDIRS)/lib/libSDL2*sudo $(RM) $(DSTDIRS)/bin/sdl2-configsudo $(RM) $(DSTDIRS)/lib/pkgconfig/sdl2.pcsudo $(RM) $(DSTDIRS)/share/aclocal/sdl2.m4sudo $(RM) $(DSTDIRS)/lib/cmake/SDL26.测试SDL
/******************************************************************** > File Name: sdl2_hello.c* > Create Time: 2021-06-06 0/22 20:47:10 +0800*================================================================*/#include
#include int main(int argc, char* argv[])
{/* 启动SDL */if(SDL_Init(SDL_INIT_VIDEO) != 0){printf("SDL_Init Error.\n");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.\n");SDL_Quit();return 1;}/* 创建渲染器 */SDL_Renderer *ren = SDL_CreateRenderer(win , -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);if(ren == NULL){SDL_DestroyWindow(win);printf("SDL_CreateRenderer Error.\n");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.\n");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.\n");SDL_Quit();return 1;}//A sleepy rendering loop, wait for 3 seconds and render and present the screen each timefor (int i = 0; i < 3; ++i){//First clear the rendererSDL_RenderClear(ren);//Draw the textureSDL_RenderCopy(ren, tex, NULL, NULL);//Update the screenSDL_RenderPresent(ren);//Take a quick break after all that hard workSDL_Delay(1000);}SDL_DestroyTexture(tex);SDL_DestroyRenderer(ren);SDL_DestroyWindow(win);SDL_Quit();return 0;
}
Makefile:
CC = gcc
C_SRC = ${wildcard *.c}
BIN = ${patsubst %.c, %, $(C_SRC)}INCDIRS :=
LIBDIRS :=INCDIRS += /home/fly/workSpace/SDL2/SDL2-2.0.14/_install/include/SDL2
LIBDIRS += /home/fly/workSpace/SDL2/SDL2-2.0.14/_install/libCFLAGS = -g -Wall -I$(INCDIRS) -L$(LIBDIRS) -lSDL2 -lpthread -lm -ldlall:$(BIN)$(BIN):%:%.c$(CC) -o $@ $^ $(CFLAGS)clean:$(RM) a.out $(BIN).PHONY: all clean
Ubuntu中测试效果：
======================================================================
7.参考
1.Linux下编译安装SDL2
2.SDL中文教程 - 游戏编程入门
3.SDL学习代码GIT仓库
4.使用SDL1.2版本的 同学注意了,SDL2.0版本的变动
5.TwinklebearDev SDL 2.0 教程
6.我的SDL2学习GIT仓库
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