/usr/include/fontforge/nonlineartrans.h is in libfontforge-dev 20120731.b-5ubuntu0.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | /* Copyright (C) 2003-2012 by George Williams */
/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "fontforgeui.h"
#include <utype.h>
#include <ustring.h>
#include <math.h>
#ifdef HAVE_IEEEFP_H
# include <ieeefp.h> /* Solaris defines isnan in ieeefp rather than math.h */
#endif
#ifndef _NONLINEARTRANS_H
#define _NONLINEARTRANS_H
enum operator {
op_base = 0x100, /* Bigger than any character */
op_x, op_y, /* Returns current x & y values, no operands */
op_value, /* Returns a constant value */
op_negate, op_not, /* Unary operators: op1 */
op_log, op_exp, op_sqrt, op_sin, op_cos, op_tan,
op_abs, op_rint, op_floor, op_ceil,
op_pow, /* Binary operators: op1, op2 */
op_atan2,
op_times, op_div, op_mod,
op_add, op_sub,
op_eq, op_ne, op_le, op_lt, op_gt, op_ge,
op_and, op_or,
op_if /* Trinary operator: op1 ? op2 : op3 */
};
struct expr {
enum operator operator;
struct expr *op1, *op2, *op3;
real value;
};
struct context {
char *start, *cur;
unsigned int had_error: 1;
enum operator backed_token;
real backed_val;
real x, y;
struct expr *x_expr, *y_expr;
SplineChar *sc;
void *pov;
void (*pov_func)(BasePoint *me,void *);
};
extern void _SFNLTrans(FontViewBase *fv,struct context *c);
extern struct expr *nlt_parseexpr(struct context *c,char *str);
extern void nlt_exprfree(struct expr *e);
extern void CVNLTrans(CharViewBase *cv,struct context *c);
extern void SPLPoV(SplineSet *spl,struct pov_data *pov, int only_selected);
#endif
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