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   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                                 tgi-kernel.h                              */
   4 /*                                                                           */
   5 /*                             TGI kernel interface                          */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 2002      Ullrich von Bassewitz                                       */
  10 /*               Wacholderweg 14                                             */
  11 /*               D-70597 Stuttgart                                           */
  12 /* EMail:        uz@musoftware.de                                            */
  13 /*                                                                           */
  14 /*                                                                           */
  15 /* This software is provided 'as-is', without any expressed or implied       */
  16 /* warranty.  In no event will the authors be held liable for any damages    */
  17 /* arising from the use of this software.                                    */
  18 /*                                                                           */
  19 /* Permission is granted to anyone to use this software for any purpose,     */
  20 /* including commercial applications, and to alter it and redistribute it    */
  21 /* freely, subject to the following restrictions:                            */
  22 /*                                                                           */
  23 /* 1. The origin of this software must not be misrepresented; you must not   */
  24 /*    claim that you wrote the original software. If you use this software   */
  25 /*    in a product, an acknowledgment in the product documentation would be  */
  26 /*    appreciated but is not required.                                       */
  27 /* 2. Altered source versions must be plainly marked as such, and must not   */
  28 /*    be misrepresented as being the original software.                      */
  29 /* 3. This notice may not be removed or altered from any source              */
  30 /*    distribution.                                                          */
  31 /*                                                                           */
  32 /*****************************************************************************/
  33
  34
  35
  36 #ifndef _TGI_KERNEL_H
  37 #define _TGI_KERNEL_H
  38
  39
  40
  41 /*****************************************************************************/
  42 /*                                   Data                                    */
  43 /*****************************************************************************/
  44
  45
  46
  47 /* A structure that describes the header of a graphics driver loaded into
  48  * memory.
  49  */
  50 typedef struct {
  51
  52     /* Data that describes the capabilities of the driver */
  53     char                id[3];          /* Contains 0x74, 0x67, 0x69 ("tgi") */
  54     unsigned char       version;        /* Interface version */
  55     unsigned            xres;           /* X resolution */
  56     unsigned            yres;           /* Y resolution */
  57     unsigned char       colorcount;     /* Number of available colors */
  58     unsigned char       pagecount;      /* Number of screens available */
  59     unsigned char       res[6];         /* Reserved for extensions */
  60
  61     /* Jump vectors. Note that these are not C callable */
  62     void*               install;        /* INSTALL routine */
  63     void*               deinstall;      /* DEINSTALL routine */
  64     void*               init;           /* INIT routine */
  65     void*               done;           /* DONE routine */
  66     void*               geterror;       /* GETERROR routine */
  67     void*               control;        /* CONTROL routine */
  68     void*               clear;          /* CLEAR routine */
  69     void*               setviewpage;    /* SETVIEWPAGE routine */
  70     void*               setdrawpage;    /* SETDRAWPAGE routine */
  71     void*               setcolor;       /* SETCOLOR routine */
  72     void*               setpalette;     /* SETPALETTE routine */
  73     void*               getpalette;     /* GETPALETTE routine */
  74     void*               getdefpalette;  /* GETDEFPALETTE routine */
  75     void*               setpixel;       /* SETPIXEL routine */
  76     void*               getpixel;       /* GETPIXEL routine */
  77     void*               horline;        /* HORLINE routine */
  78     void*               line;           /* LINE routine */
  79     void*               bar;            /* BAR routine */
  80     void*               circle;         /* CIRCLE routine */
  81
  82 } tgi_drv_header;
  83
  84
  85
  86 /* TGI kernel variables */
  87 extern tgi_drv_header*  tgi_drv;        /* Pointer to driver */
  88 extern unsigned char    tgi_error;      /* Last error code */
  89 extern unsigned char    tgi_mode;       /* Graphics mode or zero */
  90 extern int              tgi_curx;       /* Current drawing cursor X */
  91 extern int              tgi_cury;       /* Current drawing cursor Y */
  92 extern unsigned char    tgi_color;      /* Current drawing color */
  93 extern unsigned         tgi_xres;       /* X resolution of the current mode */
  94 extern unsigned         tgi_yres;       /* Y resolution of the current mode */
  95 extern unsigned char    tgi_colorcount; /* Number of available colors */
  96 extern unsigned char    tgi_pagecount;  /* Number of available screens */
  97
  98
  99
 100 /*****************************************************************************/
 101 /*                                     Code                                  */
 102 /*****************************************************************************/
 103
 104
 105
 106 const char* __fastcall__ tgi_map_mode (unsigned char mode);
 107 /* Map a tgi mode to a driver name. Returns NULL if no driver available. */
 108
 109 void __fastcall__ tgi_setup (void);
 110 /* Setup the driver and graphics kernel once the driver is loaded */
 111
 112
 113
 114 /* End of tgi-kernel.h */
 115 #endif
 116
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 119