harvey/sys/src/cmd/gs/src/gxop1.h

/* Copyright (C) 1991, 1992, 1998 Aladdin Enterprises.  All rights reserved.
  
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  Every copy of AFPL Ghostscript must include a copy of the License, normally
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*/

/*$Id: gxop1.h,v 1.2 2000/09/19 19:00:39 lpd Exp $ */
/* Type 1 state shared between interpreter and compiled fonts. */

#ifndef gxop1_INCLUDED
#  define gxop1_INCLUDED

/*
 * The current point (px,py) in the Type 1 interpreter state is not
 * necessarily the same as the current position in the path being built up.
 * Specifically, (px,py) may not reflect adjustments for hinting,
 * whereas the current path position does reflect those adjustments.
 */

/* Define the shared Type 1 interpreter state. */
#define max_coeff_bits 11	/* max coefficient in char space */
typedef struct gs_op1_state_s {
    struct gx_path_s *ppath;
    struct gs_type1_state_s *pcis;
    fixed_coeff fc;
    gs_fixed_point co;		/* character origin (device space) */
    gs_fixed_point p;		/* current point (device space) */
} gs_op1_state;
typedef gs_op1_state *is_ptr;

/* Define the state used by operator procedures. */
/* These macros refer to a current instance (s) of gs_op1_state. */
#define sppath s.ppath
#define sfc s.fc
#define spt s.p
#define ptx s.p.x
#define pty s.p.y

/* Accumulate relative coordinates */
/****** THESE ARE NOT ACCURATE FOR NON-INTEGER DELTAS. ******/
/* This probably doesn't make any difference in practice. */
#define c_fixed(d, c) m_fixed(d, c, sfc, max_coeff_bits)
#define accum_x(dx)\
  BEGIN\
    ptx += c_fixed(dx, xx);\
    if ( sfc.skewed ) pty += c_fixed(dx, xy);\
  END
#define accum_y(dy)\
  BEGIN\
    pty += c_fixed(dy, yy);\
    if ( sfc.skewed ) ptx += c_fixed(dy, yx);\
  END
void accum_xy_proc(P3(is_ptr ps, fixed dx, fixed dy));

#define accum_xy(dx,dy)\
  accum_xy_proc(&s, dx, dy)

/* Define operator procedures. */
int gs_op1_closepath(P1(is_ptr ps));
int gs_op1_rrcurveto(P7(is_ptr ps, fixed dx1, fixed dy1,
			fixed dx2, fixed dy2, fixed dx3, fixed dy3));

#endif /* gxop1_INCLUDED */