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#define FALSE 0
#define TRUE 1

extern unsigned long egacolor[16];

struct VbeInfoBlock {
	unsigned char VbeSignature[4] ;
	unsigned int VbeVersion;
	char far *OemStringPtr;
	unsigned char Capabilities[4];
	char far *VideoModePtr;
	unsigned int TotalMemory;
	unsigned int OemSoftwareRev;
	char far *OemVendorNamePtr;
	char far *OemProductNamePtr;
	char far *OemProductRevPtr;
	char Reserved[222];
	char OemData[256];
};



struct ModeInfoBlock {
/*  Mandatory information for all VBE revisions */
	unsigned int ModeAttributes;
	unsigned char WinAAttributes;		/* window A attributes */
	unsigned char WinBAttributes;		/* window B attributes */
	unsigned int WinGranularity;		/* window granularity  */
	unsigned int WinSize;			/* window size         */
	unsigned int WinASegment;		/* window A start segment */
	unsigned int WinBSegment;		/* window B start segment */
	void far *WinFuncPtr;			/* pointer to window function */
	unsigned int BytesPerScanLine;		/* bytes per scan line */

/* Mandatory information for VBE 1.2 and above */
	unsigned int XResolution;		/* horizontal resolution in pixels or chars */
	unsigned int YResolution; 		/* vertical resolution in pixels or chars */
	unsigned char XCharSize;   		/* character cell width in pixels */
	unsigned char YCharSize;          	/* character cell height in pixels */
	unsigned char NumberOfPlanes;		/* number of memory planes */
	unsigned char BitsPerPixel;       	/* bits per pixel */
	unsigned char NumberOfBanks;      	/* number of banks */
	unsigned char MemoryModel;        	/* memory model type */
	unsigned char BankSize;            	/* bank size in KB */
	unsigned char NumberOfImagePages;	/* number of images */
	unsigned char Reserved;           	/* reserved for page function */

/* Direct Color fields (required for direct/6 and YUV/7 memory models) */

	unsigned char RedMaskSize;       	/* size of direct color red mask in bits */
	unsigned char RedFieldPosition;    	/* bit position of lsb of red mask */
	unsigned char GreenMaskSize;       	/* size of direct color green mask in bits */
	unsigned char GreenFieldPosition; 	/* bit position of lsb of green mask */
	unsigned char BlueMaskSize;       	/* size of direct color blue mask in bits */
	unsigned char BlueFieldPosition; 	/* bit position of lsb of blue mask */
	unsigned char RsvdMaskSize;       	/* size of direct color reserved mask in bits */
	unsigned char RsvdFieldPosition;  	/* bit position of lsb of reserved mask */
	unsigned char DirectColorModeInfo; 	/* direct color mode attributes */

/* Mandatory information for VBE 2.0 and above */
	void far *PhysBasePtr;        		/* physical address for flat frame buffer */
	void far *OffScreenMemOffset; 		/* pointer to start of off screen memory */
	unsigned int OffScreenMemSize; 		/* amount of off screen memory in 1k units */
	unsigned char Reserved2[206];		/* remainder of ModeInfoBlock */
};


/* Core VBE functions */
int vbeGetInfo(struct VbeInfoBlock *vbe_info);
int vbeGetModeInfo(int mode, struct ModeInfoBlock *mode_info);
int vbeSetMode(int mode);
int vbeSetLogicalLineLength(int length);
int vbeGetLogicalLineLength(void);
int vbeSetDisplayStart(int x, int y, int vbsync);
int vbeGetDisplayStart(void);

/* vbe_init initializes several parameters needed for the below functions */
int vbeInit(int mode, int set_mode);
int vbeExit(void);

void vbeSetText(void);
void vbeSetGraph(void);
void vbeVsync(void);
void vbeChangeWindow(int window);
void vbeDrawLine(int x1, int y1, int x2, int y2, unsigned long color);
void vbeDrawBox(int x1, int y1, int x2, int y2, unsigned long color);
void vbeDrawPoly(int numpoints, int far *polypoints, unsigned long color);
void vbeClrArea(int x, int y, int w, int h, unsigned long color);
void vbeClrScr(unsigned long color);
void vbePutPixel(int x, int y, unsigned long color);
unsigned long vbeGetPixel(int x, int y);
void vbePutImage(int x, int y, int w, int h, unsigned long far *offset);
void vbeGetImage(int x, int y, int w, int h, unsigned long far *offset);
void vbePutSprite(int x, int y, int w, int h, unsigned long far *offset);


/* Text stuff */

#define THIN_CURSOR 0
#define FAT_CURSOR  1

void vbeTxtColor(unsigned long fg, unsigned long bg);
int vbeLoadFont(char *fontname);
void vbeWriteChar(int x, int y, unsigned long color, int c);
void vbeWriteString(int x, int y, unsigned long color, unsigned char far *string);
void vbeWriteCharOpaque(int x, int y, unsigned long fgcol, unsigned long bgcol, int c);
void vbeWriteStringOpaque(int x, int y, unsigned long fgcol, unsigned long bgcol, unsigned char far *string);
void vbeWriteVertString(int x, int y, unsigned long color, unsigned char far *string);
void vbeWriteVertStringOpaque(int x, int y, unsigned long fgcol, unsigned long bgcol, unsigned char far *string);
void vbePutch(int c);
void vbePrintf(char *s);
void vbeEdgets(char *s, int maxlen, int mk_upper);
void vbeSetCurType(int type);
void vbePosCur(int x, int y);
void vbeHideCur(void);
void vbeShowCur(void);
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