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// BLACKBOX.H - Header file for demo game engine library 
 
// watch for multiple inclusions 
#ifndef BLACKBOX 
#define BLACKBOX 
 
// DEFINES //////////////////////////////////////////////////// 
 
// default screen size 
#define SCREEN_WIDTH    640  // size of screen 
#define SCREEN_HEIGHT   480 
#define SCREEN_BPP      8    // bits per pixel 
#define MAX_COLORS      256  // maximum colors 
 
// MACROS ///////////////////////////////////////////////////// 
 
// these read the keyboard asynchronously 
#define KEY_DOWN(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 1 : 0) 
#define KEY_UP(vk_code)   ((GetAsyncKeyState(vk_code) & 0x8000) ? 0 : 1) 
 
// initializes a direct draw struct 
#define DD_INIT_STRUCT(ddstruct) { memset(&ddstruct,0,sizeof(ddstruct)); ddstruct.dwSize=sizeof(ddstruct); } 
 
// TYPES ////////////////////////////////////////////////////// 
 
// basic unsigned types 
typedef unsigned short USHORT; 
typedef unsigned short WORD; 
typedef unsigned char  UCHAR; 
typedef unsigned char  BYTE; 
 
// EXTERNALS ////////////////////////////////////////////////// 
 
extern LPDIRECTDRAW7         lpdd;                 // dd object 
extern LPDIRECTDRAWSURFACE7  lpddsprimary;         // dd primary surface 
extern LPDIRECTDRAWSURFACE7  lpddsback;            // dd back surface 
extern LPDIRECTDRAWPALETTE   lpddpal;              // a pointer to the created dd palette 
extern LPDIRECTDRAWCLIPPER   lpddclipper;          // dd clipper 
extern PALETTEENTRY          palette[256];         // color palette 
extern PALETTEENTRY          save_palette[256];    // used to save palettes 
extern DDSURFACEDESC2        ddsd;                 // a direct draw surface description struct 
extern DDBLTFX               ddbltfx;              // used to fill 
extern DDSCAPS2              ddscaps;              // a direct draw surface capabilities struct 
extern HRESULT               ddrval;               // result back from dd calls 
extern DWORD                 start_clock_count;    // used for timing 
 
// these defined the general clipping rectangle 
extern int min_clip_x,                             // clipping rectangle  
           max_clip_x,                   
           min_clip_y,      
           max_clip_y;                   
 
// these are overwritten globally by DD_Init() 
extern int screen_width,                            // width of screen 
           screen_height,                           // height of screen 
           screen_bpp;                              // bits per pixel  
 
// PROTOTYPES ///////////////////////////////////////////////// 
 
// DirectDraw functions 
int DD_Init(int width, int height, int bpp); 
int DD_Shutdown(void); 
LPDIRECTDRAWCLIPPER DD_Attach_Clipper(LPDIRECTDRAWSURFACE7 lpdds, int num_rects, LPRECT clip_list); 
int DD_Flip(void); 
int DD_Fill_Surface(LPDIRECTDRAWSURFACE7 lpdds,int color); 
 
// general utility functions 
DWORD Start_Clock(void); 
DWORD Get_Clock(void); 
DWORD Wait_Clock(DWORD count); 
 
// graphics functions 
int Draw_Rectangle(int x1, int y1, int x2, int y2, int color,LPDIRECTDRAWSURFACE7 lpdds=lpddsback); 
 
// gdi functions 
int Draw_Text_GDI(char *text, int x,int y,COLORREF color, LPDIRECTDRAWSURFACE7 lpdds=lpddsback); 
int Draw_Text_GDI(char *text, int x,int y,int color, LPDIRECTDRAWSURFACE7 lpdds=lpddsback); 
 
#endif