/*****************************************************************************/
/*                                                                           */
/*                                 tgi-kernel.h                              */
/*                                                                           */
/*                             TGI kernel interface                          */
/*                                                                           */
/*                                                                           */
/*                                                                           */
/* (C) 2002-2009, Ullrich von Bassewitz                                      */
/*                Roemerstrasse 52                                           */
/*                D-70794 Filderstadt                                        */
/* EMail:         uz@cc65.org                                                */
/*                                                                           */
/*                                                                           */
/* This software is provided 'as-is', without any expressed or implied       */
/* warranty.  In no event will the authors be held liable for any damages    */
/* arising from the use of this software.                                    */
/*                                                                           */
/* Permission is granted to anyone to use this software for any purpose,     */
/* including commercial applications, and to alter it and redistribute it    */
/* freely, subject to the following restrictions:                            */
/*                                                                           */
/* 1. The origin of this software must not be misrepresented; you must not   */
/*    claim that you wrote the original software. If you use this software   */
/*    in a product, an acknowledgment in the product documentation would be  */
/*    appreciated but is not required.                                       */
/* 2. Altered source versions must be plainly marked as such, and must not   */
/*    be misrepresented as being the original software.                      */
/* 3. This notice may not be removed or altered from any source              */
/*    distribution.                                                          */
/*                                                                           */
/*****************************************************************************/



#ifndef _TGI_KERNEL_H
#define _TGI_KERNEL_H



/*****************************************************************************/
/*				     Data                                    */
/*****************************************************************************/



/* TGI kernel variables */
extern void*   	        tgi_drv;       	/* Pointer to driver */
extern unsigned char  	tgi_error;     	/* Last error code */
extern unsigned char    tgi_gmode;      /* Flag: Graphics mode active */
extern int              tgi_curx;       /* Current drawing cursor X */
extern int              tgi_cury;       /* Current drawing cursor Y */
extern unsigned char    tgi_color;      /* Current drawing color */
extern unsigned         tgi_xres;       /* X resolution of the current mode */
extern unsigned         tgi_yres;       /* Y resolution of the current mode */
extern unsigned char    tgi_colorcount; /* Number of available colors */
extern unsigned char    tgi_pagecount;  /* Number of available screens */
extern unsigned         tgi_aspectratio;/* Aspect ratio as fixed point 8.8 */



/*****************************************************************************/
/*                                     Code                                  */
/*****************************************************************************/



const char* __fastcall__ tgi_map_mode (unsigned char mode);
/* Map a tgi mode to a driver name. Returns NULL if no driver available. */

int __fastcall__ tgi_imulround (int rhs, int lhs);
/* Helper function for functions using sine/cosine: Multiply two values, one
 * being an 8.8 fixed point one, and return the rounded and scaled result.
 */



/* End of tgi-kernel.h */
#endif