SDL編譯安裝圖片顯示
1.SDL簡(jiǎn)介
?SDL(Simple DirectMediaLayer)是一套開放源代碼的跨平臺(tái)多媒體開發(fā)庫,使用C語言寫成。SDL提供了數(shù)種控制圖像、聲音、輸出入的函數(shù),讓開發(fā)者只要用相同或是相似的代碼就可以開發(fā)出跨多個(gè)平臺(tái)(Linux、Windows、MacOS X等)的應(yīng)用軟件?,F(xiàn)SDL多用于開發(fā)游戲、模擬器、媒體播放器等多媒體應(yīng)用領(lǐng)域。
??在編譯SDL庫前,先安裝以下工具:
sudo apt-get install autoconf
sudo apt-get install automake
sudo apt-get install libtool
sudo apt-get install make
sudo apt-get install xorg-dev
2. SDL庫編譯與安裝
?下載地址:SDL2.0
?(1)將下載的SDL2-2.0.14.tar.gz壓縮包拷貝至虛擬機(jī)解壓。
[wbyq@wbyq src_pack]$ tar xvf /mnt/hgfs/ubuntu/software_pack/SDL2-2.0.14.tar.gz
?(2)配置編譯安裝路徑
[wbyq@wbyq SDL2-2.0.14]$ ./autogen.sh
[wbyq@wbyq SDL2-2.0.14]$ ./configure --prefix=$PWD/_install
[wbyq@wbyq SDL2-2.0.14]$ make && make install
?(3)編譯成功生成文文件
[wbyq@wbyq _install]$ ls
bin include lib share
1.3 SDL2_image庫編譯與安裝
??bmp_surface加載jpg格式圖片和png格式圖片需要相對(duì)應(yīng)庫支持
[wbyq@wbyq src_pack]$ sudo apt-get install libjpeg-dev #安裝jpg庫
[wbyq@wbyq src_pack]$ sudo apt-get install libpng-dev #安裝png庫
?下載地址:SDL_IMAGE
?(1)將 SDL2_image-2.0.5.tar.gz壓縮包拷貝至虛擬機(jī)解壓。
[wbyq@wbyq src_pack]$ tar xvf /mnt/hgfs/ubuntu/software_pack/SDL2_image-2.0.5.tar.gz
?(2)配置編譯安裝路徑
[wbyq@wbyq SDL2_image-2.0.5]$ ./autogen.sh
[wbyq@wbyq SDL2_image-2.0.5]$ ./configure --prefix=$PWD/_install
[wbyq@wbyq SDL2_image-2.0.5]$ make && make install
?(3)編譯成功生成文文件
[wbyq@wbyq _install]$ tree
.
├── include
│ └── SDL2
│ └── SDL_image.h
└── lib
├── libSDL2_image-2.0.so.0 -> libSDL2_image-2.0.so.0.2.3
├── libSDL2_image-2.0.so.0.2.3
├── libSDL2_image.a
├── libSDL2_image.la
├── libSDL2_image.so -> libSDL2_image-2.0.so.0.2.3
└── pkgconfig
└── SDL2_image.pc
4 directories, 7 files
1.4 示例1:SDL顯示圖片和獲取輸入出設(shè)備數(shù)據(jù)
?1.4.1 示例代碼
#include
#include
#include
#include
typedef enum
{
false,
true
} bool;
int main(int argc,char *argv[])
{
if(SDL_Init(SDL_INIT_VIDEO))/*初始化SDL*/
{
printf("初始化失敗ERR=%srn",SDL_GetError());
return 0;
}
/*創(chuàng)建SDL窗口*/
SDL_Window *window=SDL_CreateWindow("SDL Test", SDL_WINDOWPOS_UNDEFINED,SDL_WINDOWPOS_UNDEFINED,800,480,SDL_WINDOW_SHOWN);
SDL_Rect rect;
rect.x=0;
rect.y=0;
SDL_Surface *surface=SDL_GetWindowSurface(window);/*獲取窗口*/
SDL_Surface *pngsurface=IMG_Load("bg6.png");
SDL_Surface *bmp_surface=IMG_Load("1.bmp");
SDL_BlitSurface(bmp_surface,NULL,surface,NULL);
SDL_UpdateWindowSurface(window);/*刷新窗口*/
bool quit= true;
SDL_Event event;
while(quit)
{
while(SDL_PollEvent(&event))/*監(jiān)測(cè)事件*/
{
if(event.type==SDL_QUIT)//關(guān)閉窗口
{
printf("hello,worldn");
quit=false;
printf("quit=%dn",quit);
}
else if(event.type==SDL_MOUSEBUTTONDOWN)/*鼠標(biāo)點(diǎn)擊事件*/
{
if(event.button.button==SDL_BUTTON_LEFT)/*左鍵*/
{
printf("left clickedn");
SDL_BlitSurface(bmp_surface,NULL,surface,NULL);
}
if(event.button.button==SDL_BUTTON_RIGHT)/*右鍵*/
{
printf("right clickedn");
SDL_BlitSurface(pngsurface,NULL,surface,NULL);
}
}
else if(event.type==SDL_KEYDOWN)//鍵盤事件
{
printf("key=%dn",event.key.keysym.sym);
if(event.key.keysym.sym==SDLK_UP)
{
rect.y-=10;
printf("upn");
}
else if(event.key.keysym.sym==SDLK_DOWN)
{
rect.y+=10;
printf("downn");
}
else if(event.key.keysym.sym==SDLK_LEFT)
{
rect.x-=10;
printf("leftn");
}
else if(event.key.keysym.sym==SDLK_RIGHT)
{
rect.x+=10;
printf("rightn");
}
SDL_BlitSurface(bmp_surface,NULL,surface,NULL);
SDL_BlitSurface(pngsurface,NULL,surface,&rect);
}
SDL_UpdateWindowSurface(window);/*刷新窗口*/
}
}
SDL_FreeSurface(surface);
SDL_DestroyWindow(window);/*銷毀窗口*/
SDL_Quit();/*關(guān)閉SDL*/
return 0;
}
1.4.2 Makefile文件
CFLAGS =-I/home/wbyq/src_pack/SDL2-2.0.14/_install/include -I/home/wbyq/src_pack/SDL2-2.0.14/_install/include/SDL2 -L/home/wbyq/src_pack/SDL2-2.0.14/_install/lib
CFLAGS +=-L/home/wbyq/src_pack/SDL2_image-2.0.5/_install/lib -I/home/wbyq/src_pack/SDL2_image-2.0.5/_install/include -I/home/wbyq/src_pack/SDL2_image-2.0.5/_install/include/SDL2
CFLAGS+=-lSDL2 -lpthread -lm -ldl -lSDL2_image
app:
gcc 01sdl_test.c $(CFLAGS)
1.4.3 運(yùn)行效果
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