speedo.h

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                                   /*   Bit  6: Import set width if set     */
                                   /*   Bit  7:   not used                  */
                                   /*   Bit  8: Squeeze left if set         */
                                   /*   Bit  9: Squeeze right if set        */
                                   /*   Bit 10: Squeeze top if set          */
                                   /*   Bit 11: Squeeze bottom if set       */
                                   /*   Bit 12: Clip left if set            */
                                   /*   Bit 13: Clip right if set           */
                                   /*   Bit 14: Clip top if set             */
                                   /*   Bit 15: Clip bottom if set          */
                                   /*   Bits 16-31   not used               */
#ifdef __STDC__
    void *out_info;                /* information for output module         */
#else
    char *out_info;
#endif
    }
specs_t;                           /* Specs structure for fw_set_specs      */

typedef struct tcb_tag
    {
    fix15   xxmult;                /* Linear coeff of Xorus to compute Xpix */
    fix15   xymult;                /* Linear coeff of Yorus to compute Xpix */
    fix31   xoffset;               /* Linear constant to compute Xpix       */
    fix15   yxmult;                /* Linear coeff of Xorus to compute Ypix */
    fix15   yymult;                /* Linear coeff of Yorus to compute Ypix */
    fix31   yoffset;               /* Linear constant to compute Ypix       */
    fix15   xppo;                  /* Pixels per oru in X dimension of char */
    fix15   yppo;                  /* Pixels per oru in Y dimension of char */
    fix15   xpos;                  /* Origin in X dimension of character    */
    fix15   ypos;                  /* Origin in Y dimension of character    */
    ufix16  xtype;                 /* Transformation type for X oru coords  */
    ufix16  ytype;                 /* Transformation type for Y oru coords  */
    ufix16  xmode;                 /* Transformation mode for X oru coords  */
    ufix16  ymode;                 /* Transformation mode for Y oru coords  */
	fix15  mirror;                /* Transformation creates mirror image   */
    }
tcb_t;                             /* Transformation control block          */

typedef struct point_tag
    {
    fix15   x;                     /* X coord of point (shifted pixels)     */
    fix15   y;                     /* Y coord of point (shifted pixels)     */
    }
point_t;                           /* Point in device space                 */

typedef struct band_tag
    {
    fix15   band_max;
    fix15   band_min;
    fix15   band_array_offset;
    fix15   band_floor;
    fix15   band_ceiling;
    } band_t;

typedef struct bbox_tag
    {
    fix31   xmin;
    fix31   xmax;
    fix31   ymin;
    fix31   ymax;
    } bbox_t;

#if SHORT_LISTS 
#define  MAX_INTERCEPTS  256      /* Max storage for intercepts */
typedef  ufix8   cdr_t;           /* 8 bit links in intercept chains */
#else
#define  MAX_INTERCEPTS 1000      /* Max storage for intercepts */
typedef  ufix16   cdr_t;          /* 16 bit links in intercept chains */
#endif

#if REENTRANT_ALLOC

typedef struct intercepts_tag
    {
	fix15 car[MAX_INTERCEPTS];
	fix15 cdr[MAX_INTERCEPTS];
#if INCL_SCREEN
	ufix8 inttype[MAX_INTERCEPTS];
	ufix8 leftedge;
	ufix16 fracpix;
#endif
	} intercepts_t;

typedef struct plaid_tag
	{
	fix15    orus[MAX_CTRL_ZONES];   /* Controlled coordinate table (orus) */
#if INCL_RULES
	fix15    pix[MAX_CTRL_ZONES];    /* Controlled coordinate table (sub-pixels) */
	fix15    mult[MAX_INT_ZONES];    /* Interpolation multiplier table */
	fix31    offset[MAX_INT_ZONES];  /* Interpolation offset table */
#endif
	} plaid_t;
#endif

#if INCL_MULTIDEV
#if PROTOS_AVAIL
typedef struct bitmap_tag 
	{
	void (*p_open_bitmap)(PROTO_DECL2 fix31 x_set_width, fix31 y_set_width, fix31 xorg, fix31 yorg, fix15 xsize,fix15 ysize);
	void (*p_set_bits)(PROTO_DECL2 fix15 y, fix15 xbit1, fix15 xbit2);
	void (*p_close_bitmap)(PROTO_DECL1);
	} bitmap_t;

typedef struct outline_tag 
	{
	void (*p_open_outline)(PROTO_DECL2 fix31 x_set_width, fix31 y_set_width, fix31 xmin, fix31 xmax, fix31 ymin,fix31 ymax);
	void (*p_start_char)(PROTO_DECL1);
	void (*p_start_contour)(PROTO_DECL2 fix31 x,fix31 y,boolean outside);
	void (*p_curve)(PROTO_DECL2 fix31 x1, fix31 y1, fix31 x2, fix31 y2, fix31 x3, fix31 y3);
	void (*p_line)(PROTO_DECL2 fix31 x, fix31 y);
	void (*p_close_contour)(PROTO_DECL1);
	void (*p_close_outline)(PROTO_DECL1);
	} outline_t;
#else
typedef struct bitmap_tag 
	{
	void (*p_open_bitmap)();
	void (*p_set_bits)();
	void (*p_close_bitmap)();
	} bitmap_t;

typedef struct outline_tag 
	{
	void (*p_open_outline)();
	void (*p_start_char)();
	void (*p_start_contour)();
	void (*p_curve)();
	void (*p_line)();
	void (*p_close_contour)();
	void (*p_close_outline)();
	} outline_t;
#endif
#endif

/* ---------------------------------------------------*/
/****  MAIN GLOBAL DATA STRUCTURE, SPEEDO_GLOBALS *****/

typedef struct speedo_global_data 
	{
/*  do_char.c data definitions */
#if INCL_METRICS                    /* Metrics functions supported? */
         kern_t  kern;              /* Kerning control block */
#endif                                                               /* endif incl_metrics */
	 point_t   Psw;             /* End of escapement vector (1/65536 pixel units) */

#if INCL_LCD                        /* Dynamic load character data supported? */
         fix15  cb_offset;          /* Offset to sub-char data in char buffer */
#endif                                                               /* endif incl_lcd */

/* do_trns.c data definitions */
	 point_t  P0;               /* Current point (sub-pixels) */
	 fix15    x_orus;           /* Current X argument (orus) */
	 fix15    y_orus;           /* Current Y argument (orus) */
	 fix15    x_pix;            /* Current X argument (sub-pixels) */
	 fix15    y_pix;            /* Current Y argument (sub-pixels) */
	 ufix8    x_int;            /* Current X interpolation zone */
	 ufix8    y_int;            /* Current Y interpolation zone */

#if INCL_MULTIDEV && INCL_OUTLINE
     outline_t outline_device;
     boolean   outline_device_set;
#endif

#if INCL_BLACK || INCL_SCREEN || INCL_2D
#if INCL_MULTIDEV
     bitmap_t bitmap_device;
     boolean  bitmap_device_set;
#endif
     band_t   y_band;           /* Y current band(whole pixels) */

	 struct set_width_tag
        {
        fix31 x;
        fix31 y;
        } set_width; /* Character escapement vector */

	 boolean  first_pass;       /* TRUE during first pass thru outline data */
	 boolean  extents_running;  /* T if extent accumulation for each vector */
	 fix15    x0_spxl;          /* X coord of current point (sub pixels) */
	 fix15    y0_spxl;          /* Y coord of current point (sub pixels) */
	 fix15    y_pxl;            /* Y coord of current point (whole pixels) */
#if REENTRANT_ALLOC
     intercepts_t STACKFAR *intercepts;
#else                                                                /* else if not reentrant */
	 fix15    car[MAX_INTERCEPTS]; /* Data field of intercept storage */
	 cdr_t    cdr[MAX_INTERCEPTS]; /* Link field of intercept storage */
#if INCL_SCREEN
         ufix8    inttype[MAX_INTERCEPTS];
         ufix8    leftedge;
         ufix16   fracpix;
#endif                                                               /* endif incl_screen */
#endif                                                               /* endif reentrant */
	 fix15    bmap_xmin;        /* Min X value (sub-pixel units) */
	 fix15    bmap_xmax;        /* Max X value (sub-pixel units) */
	 fix15    bmap_ymin;        /* Min Y value (sub-pixel units) */
	 fix15    bmap_ymax;        /* Max Y value (sub-pixel units) */
	 fix15    no_y_lists;       /* Number of active intercept lists */
	 fix15    first_offset;     /* Index of first active list cell */
	 fix15    next_offset;      /* Index of next free list cell */
	 boolean  intercept_oflo;   /* TRUE if intercepts data lost */
#endif                                                               /* endif incl_black, incl_screen, incl_2d */

/* bounding box now used by all output modules, including outline */
	 fix15    xmin;             /* Min X value in whole character */
	 fix15    xmax;             /* Max X value in whole character */
	 fix15    ymin;             /* Min Y value in whole character */
	 fix15    ymax;             /* Max Y value in whole character */

#if INCL_2D
         fix15    no_x_lists;       /* Number of active x intercept lists */
         band_t   x_band;           /* X current band(whole pixels) */
         boolean  x_scan_active;    /* X scan flag during scan conversion */
#endif

/* reset.c data definitions */
         ufix16   key32;            /* Decryption keys 3,2 combined */
         ufix8    key4;             /* Decryption key 4 */
         ufix8    key6;             /* Decryption key 6 */
         ufix8    key7;             /* Decryption key 7 */
         ufix8    key8;             /* Decryption key 8 */

/* set_spcs.c data definitions */
         buff_t   font;
         buff_t GLOBALFAR *pfont; /* Pointer to font buffer structure */
         fix31    font_buff_size; /* Number of bytes loaded in font buffer */
         ufix8 FONTFAR *pchar_dir; /* Pointer to character directory */
         fix15    first_char_idx; /* Index to first character in font */
         fix15    no_chars_avail; /* Total characters in font layout */
         fix15    orus_per_em;    /* Outline resolution */
         fix15    metric_resolution; /* metric resolution for setwidths, kerning pairs
							(defaults to orus_per_em) */
         tcb_t    tcb0;           /* Top level transformation control block */
	
         boolean  specs_valid;    /* TRUE if fw_set_specs() successful */
	
         fix15    depth_adj;      /* Curve splitting depth adjustment */
         boolean  curves_out;     /* Allow curves to output module */
         fix15    output_mode;    /* Output module selector */
         fix15    thresh;         /* Scan conversion threshold (sub-pixels) */
         boolean  normal;         /* TRUE if 0 obl and mult of 90 deg rot  */
	
         fix15    multshift;      /* Fixed point shift for multipliers */
         fix15    pixshift;       /* Fixed point shift for sub-pixels */
         fix15    poshift;        /* Left shift from pixel to output format */
         fix15    mpshift;        /* Fixed point shift for mult to sub-pixels */
         fix31    multrnd;        /* 0.5 in multiplier units */
         fix15    pixrnd;         /* 0.5 in sub-pixel units */
         fix31    mprnd;          /* 0.5 sub-pixels in multiplier units */
         fix15    pixfix;         /* Mask to remove fractional pixels */
         fix15    onepix;         /* 1.0 pixels in sub-pixel units */

#if PROTOS_AVAIL
         boolean (*init_out)(PROTO_DECL2 specs_t GLOBALFAR *specsarg);
         boolean (*begin_char)(PROTO_DECL2 point_t Psw,point_t Pmin,point_t Pmax); 
         void    (*begin_sub_char)(PROTO_DECL2 point_t Psw,point_t Pmin,point_t Pmax);
         void    (*begin_contour)(PROTO_DECL2 point_t P1,boolean outside); 
         void    (*curve)(PROTO_DECL2 point_t P1, point_t P2, point_t P3, fix15 depth);  
         void    (*line)(PROTO_DECL2 point_t P1);               
         void    (*end_contour)(PROTO_DECL1); 
         void    (*end_sub_char)(PROTO_DECL1);
         boolean (*end_char)(PROTO_DECL1);    
#else                                                                /* if not protos */
         boolean (*init_out)();
         boolean (*begin_char)(); 
         void    (*begin_sub_char)();
         void    (*begin_contour)(); 
         void    (*curve)();         
         void    (*line)();               
         void    (*end_contour)(); 
         void    (*end_sub_char)();