SDL_dots.rar_sdl

#include "stdio.h" #include "stdlib.h" #include "string.h" #include "SDL/SDL.h" #include "SDL/SDL_image.h" #include "windows.h" const int SCREEN_WIDTH = 640; //洜枊?搙 const int SCREEN_HEIGHT = 480; //洜枊崅搙 const int SCREEN_BPP = 32; //洜枊強巊梡揑憸慺怓嵤埵悢 SDL_Surface *screen = NULL; //洜枊愙岥 /* ?擖埵?*/ SDL_Surface *load_image( char *filename ) { //彨?徾??懚?嵼?棦 SDL_Surface* loadedImage = NULL; //懚?嵟壚揑?徾 SDL_Surface* optimizedImage = NULL; //?擖?徾 loadedImage = IMG_Load ( filename );//SDL_LoadBMP( filename ); //擛壥?擖?徾晄?嬻 if( loadedImage != NULL ) { //寶棫嵟壚揑?徾 optimizedImage = SDL_DisplayFormat( loadedImage ); //?曻榁揑?徾 SDL_FreeSurface( loadedImage ); if( optimizedImage != NULL ) { //取得颜色码 Uint32 colorkey = SDL_MapRGB( optimizedImage->format, 0, 0, 0xFF ); //设置颜色码 SDL_SetColorKey( optimizedImage, SDL_RLEACCEL | SDL_SRCCOLORKEY, colorkey ); } } //曉夞嵟壚揑?徾 return optimizedImage; } /*?帵敓悢*/ void apply_surface( int x, int y, SDL_Surface* source, SDL_Surface* destination ,SDL_Rect* clip = NULL) { //寶棫堦槩??揑嬮宍?抲?帵揑嵖? SDL_Rect offset; //?抲嵖? offset.x = x; offset.y = y; //?帵?徾 SDL_BlitSurface( source, clip, destination, &offset ); } int main( int argc, char* args[] ) //庡掱彉 { char msg[500]; // 摼摓宯?徚懅 int done,i=0; int x=100,y=100; SDL_Rect clip; /* 弶巒壔SDL */ if (SDL_Init (SDL_INIT_VIDEO) < 0) { sprintf (msg,"not SDL: %sn", SDL_GetError ()); MessageBox (0, msg, "Error", MB_ICONHAND); exit (1); } atexit (SDL_Quit); /* ?抲 640x480 16-bits ?徾柾幃 */ screen = SDL_SetVideoMode (640, 480, 16, SDL_SWSURFACE | SDL_DOUBLEBUF); if (screen == NULL) { sprintf (msg,"not 640x480x16%sn", SDL_GetError ()); MessageBox (0, msg, "Error", MB_ICONHAND); exit (2); } /*?抲SDL鈞岥?? */ SDL_WM_SetCaption ("hello,the world", NULL); SDL_Surface* background=NULL; background=load_image("background.png"); SDL_Surface* dots= load_image("demo.jpg"); /*?擖?徾 done = 0;*/ SDL_Surface* demo= load_image("11484297531.gif"); done = 0; //熰?弞? done=1?戅弌丆done=0??? while (!done) { SDL_Event event; /* Check for events */ while (SDL_PollEvent (&event)) { switch (event.type) { case SDL_KEYDOWN: break; case SDL_QUIT: done = 1; break; default: break; } } Uint8 *keystates = SDL_GetKeyState( NULL ); //如果向上键被按下 if( keystates[ SDLK_UP ] ) { y-=1; //坐标Y轴加1 } //如果向下键被按下 if( keystates[ SDLK_DOWN ] ) { y+=1; //坐标Y轴减1 } //如果向左键被按下 if( keystates[ SDLK_LEFT ] ) { x-=1; //坐标X轴减1 } //如果向右键被按下 if( keystates[ SDLK_RIGHT ] ) { x+=1; //坐标X轴加1 } /*嵼洜枊忋夋?*/ apply_surface(0,0,background,screen,NULL); clip.x=x; clip.y=y; clip.w=640; clip.h=480; apply_surface(0,0,demo,screen,&clip); if(i>=10) i=0; clip.x=i*150; clip.y=0; clip.w=150; clip.h=200; apply_surface(100,100,dots,screen,&clip); Sleep(30); i+=1; //峏怴洜枊 if( SDL_Flip( screen ) == -1 ) { return 1; } //嵟岪丆?徾?帵姰?丆変?梫?曻?徾丅 } /*?曻?徾*/ SDL_FreeSurface(demo); SDL_FreeSurface(screen); SDL_FreeSurface(background); SDL_FreeSurface(dots); SDL_Quit(); return 0; }