SGI Developer Toolbox 6.1/SGI Developer Toolbox 6.1 - Disc 1.iso/toolbox/src/exampleCode/opengl/GLUT/lib/glut/strokegen.y

Lex Description | 1996-11-11 | 15.4 KB | 650 lines

%{
/* $XConsortium: to_wfont.y,v 5.7 94/04/17 20:10:08 rws Exp $ */

/*****************************************************************

Copyright (c) 1989,1990, 1991  X Consortium

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the X Consortium.

Copyright (c) 1989,1990, 1991 by Sun Microsystems, Inc.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the names of Sun Microsystems,
and the X Consortium, not be used in advertising or publicity
pertaining to distribution of the software without specific, written
prior permission.

SUN MICROSYSTEMS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT
SHALL SUN MICROSYSTEMS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.

******************************************************************/


#define YYMAXDEPTH 10000

#include <X11/Xos.h>
#include <stdio.h>
#include <ctype.h>
#ifndef L_SET
#define L_SET SEEK_SET
#endif
#include "stroke.h"

#ifdef X_NOT_STDC_ENV
FILE *fopen();
#endif

typedef struct {

        float           std_left,      /* NCGA standard left spacing */
                        std_wide,      /* character width            */
                        std_rght;      /* Right spacing              */
}               Standard;


char            fname[80];
char            symname[80] = "FONT";
Dispatch        *Table;    /* dispatch table */
Standard    *sp_table; /* NCGA font spacings */
Path            *strokes;  /* strokes of each character */
Property        *property; /* property list */

struct {
    int path, point, props;
} count, expect;

Path_subpath   *current_path;

Font_header     head;        /* font header */
int             tableindex;    /* which character */
int             yyerrno;    /* error number */

%}

%union {
    int    nil;    /* void is reserved */
    int    ival;
    float    dval;
    char    *cval;
}

%start font

%token <dval> REAL
%token <ival> INTEGER
%token <cval> STRING

%token <nil> BOTTOM
%token <nil> CENTER
%token <nil> CLOSE
%token <nil> FONTNAME
%token <nil> PROPERTIES
%token <nil> NUM_CH
%token <nil> INDEX
%token <nil> L_SPACE
%token <nil> MAGIC
%token <nil> OPEN
%token <nil> RIGHT
%token <nil> R_SPACE
%token <nil> STROKE
%token <nil> TOP
%token <nil> VERTICES
%token <nil> BEARING
%token <nil> WIDTH

%type <cval> fontname
%type <ival> properties
%type <dval> top bottom center right
%type <ival> nstroke nvertice n_pts index num_ch
%type <ival> closeflag
%type <ival> counter
%type <dval> sp_left wide sp_right

%%

font : fontheader num_ch fontprops fontbody spacing { fini(); }|
    fontheader fontbody  { fini(); };

fontheader : fontname top bottom
    { wf_header($1, $2, $3); };

fontname : FONTNAME STRING
    { $$ = $2; };

top : TOP REAL { $$ = $2;};

bottom : BOTTOM REAL { $$ = $2;};

num_ch: NUM_CH INTEGER { set_num_ch($2);};

fontprops : /* empty */ | properties;

properties : PROPERTIES INTEGER { init_properties ($2); } property_list
        { check_num_props (); }

property_list : /* empty */ | single_property property_list

single_property : STRING STRING { add_property($1, $2); };

fontbody :     /* empty */
    | glyph fontbody;

glyph : glyph_header strokes
    { check_nstroke(); };

glyph_header : index { tableindex = $1; } sym_headinfo;

sym_headinfo :  nstroke center right nvertice
    { glyph_header($1, $2, $3, $4); };

index : INDEX INTEGER { check_num_ch(); $$ = $2; };

nstroke : STROKE INTEGER { $$ = $2; expect.path = $2; };

nvertice: {$$ = 0;} | VERTICES INTEGER  { $$ = $2; }  ;

center : CENTER REAL{ $$ = $2; };

right : RIGHT REAL{ $$ = $2; };

strokes :    /* empty */ | path strokes;

path : closeflag n_pts { init_path($1, $2); } points
    { check_npts(); }

points :     /* empty */ | coord points;

closeflag : CLOSE { $$ = $1 == CLOSE; } | OPEN { $$ = $1 == CLOSE; } ;

n_pts : INTEGER { $$ = $1; };

coord : REAL REAL { add_point($1, $2); };

spacing :     /* empty */
    | item spacing;

item : counter {tableindex = $1;} sp_left wide sp_right
    { std_space($3, $4, $5); };

counter  : BEARING INTEGER {$$ = $2;};

sp_left: L_SPACE REAL {$$ = $2;};

wide :  WIDTH REAL {$$ = $2;};

sp_right: R_SPACE REAL {$$ = $2;};

%%

#define BYE(err)    yyerrno = (err), yyerror()

#define ERR_BASE    1000
#define OPEN_ERROR     1001
#define WRITE_ERROR     1002
#define WRONG_NAME     1003
#define NO_MEMORY     1004
#define EXCEED_PATH     1005
#define EXCEED_POINT     1006
#define PATH_MISMATCH    1007
#define POINT_MISMATCH    1008
#define PROP_MISMATCH   1009
#define EXCEED_PROPS     1010

char    *prog;

main(argc, argv)
    int             argc;
    char           *argv[];

{
    /* Usage : to_wfont [-o outfile] [infile] */
    char           *s;

    fname[0] = 0;
    tableindex = 0;
    head.num_ch = -1;

    prog = *argv;
    while (--argc > 0 && *++argv != NULL) {
        s = *argv;
        if (*s++ == '-')
            switch (*s) {
            case 's':
                if (*++argv != NULL)
                {
                    --argc;
                    (void) strcpy(symname, *argv);
                }
                break;
            case 'o':
                if (*++argv != NULL)
                {
                    --argc;
                    (void) strcpy(fname, *argv);
                }
                break;
            default:      /* ignore other options */
                ;
            }
        else {
            FILE           *fp;

            /* standard input redirection */
            fp = fopen(*argv, "r");
            if (fp != NULL) {
                if (close(fileno(stdin)) < 0)
                {
                    perror(prog);
                    return;
                }
                if (dup(fileno(fp)) < 0)
                {
                    perror(prog);
                    return;
                }
                (void) fclose(fp);
            }
        }
    }
    return (yyparse());
}

/* set number of characters */
set_num_ch(num_ch)
int num_ch;
{
    yyerrno = 0;
    head.num_ch = num_ch;
    if (num_ch > 0) {
      Table    = (Dispatch *) malloc(num_ch * sizeof(Dispatch));
      sp_table = (Standard *) malloc(num_ch * sizeof(Standard));
      strokes  = (Path *)     malloc(num_ch * sizeof(Path));
    }

    for (tableindex = 0; tableindex < num_ch; tableindex++) {
        Table[tableindex].center = 0.0;
        Table[tableindex].right = 0.0;
        Table[tableindex].offset = 0;

        sp_table[tableindex].std_left = 0.0;
        sp_table[tableindex].std_wide = 0.0;
        sp_table[tableindex].std_rght = 0.0;

        strokes[tableindex].n_subpaths = 0;
        strokes[tableindex].n_vertices = 0;
        strokes[tableindex].subpaths = NULL;
    }
}

/* initialize the property info in the header */
init_properties(num_props)
    int             num_props;
{
    if (num_props > 0) {
      head.properties = (Property *)
                          malloc (num_props * sizeof (Property));
      head.num_props = expect.props = num_props;
    }
    else {
      head.properties = NULL;
      head.num_props = expect.props = 0;
    }
    count.props = -1;
    property = head.properties;  /* initialize the list pointer */
}

check_num_props()
{
        count.props++;
        if (count.props != expect.props)
      BYE (PROP_MISMATCH);
}

/* add individual property info into the buffer */
add_property(name, value)
    char            *name,
            *value;
{
        /* check if the property exceeds allocated space */

        if (++count.props >= head.num_props)
         BYE(EXCEED_PROPS);

    /* copy the strings into the buffer */

    (void) strcpy (property->propname, name);
    (void) strcpy (property->propvalue, value);

    /* increment the property pointer */

    property++;
}

check_num_ch()
{

  if (head.num_ch == -1)
    set_num_ch(128);

}

yyerror()
{
#ifndef __bsdi__
    extern int      yylineno;
#endif
#    define ERR_SIZE (sizeof(err_string) / sizeof(char *))
    static char    *err_string[] = {
        "Cannot open file",
        "Write fails",
        "Illegal font name",
        "Memory allocation failure",
        "Specified number of strokes exceeded",
        "Specified number of points exceeded",
        "Number of strokes do not match",
        "Number of points do not match",
        "Number of properties do not match",
        "Specified number of properties exceeded",
    0};
    char           *str;

    yyerrno -= ERR_BASE;
    if (yyerrno > 0 && yyerrno < ERR_SIZE)
        str = err_string[yyerrno-1];
    else
        str = "Syntax error";
#ifdef __bsdi__
        fprintf(stderr, "%s.\n", str);
#else
        fprintf(stderr, "line %d: %s.\n", yylineno, str);
#endif
    freeall();
    (void) unlink(fname);
    exit(1);
}

/* create wfont header */
wf_header(name, top, bottom)
    char           *name;
    float           top,
                    bottom;
{

    if (name == NULL)
        BYE(WRONG_NAME);
    head.top = (float) top;
    head.bottom = (float) bottom;
    head.magic = WFONT_MAGIC_PEX;
    (void) strcpy(head.name, name);
    free(name);
}

/* create header for each glyph */
glyph_header(npath, center, right, npts)
    int             npath,
                    npts;
    float           center,
                    right;
{
     {
    register Path  *strk = strokes + tableindex;

        if (npath > 0)     /* Don't allocate space unless the character
                  has strokes associated with it. */
    {
        strk->subpaths = (Path_subpath *)
            malloc(npath * sizeof (Path_subpath));

        if (strk->subpaths == NULL)
            BYE(NO_MEMORY);

        strk->type = PATH_2DF;
        strk->n_subpaths = npath;
        strk->n_vertices = npts;
    }
    else {            /* Just initialize the entry */
            strk->subpaths = NULL;
        strk->type = PATH_2DF;
        strk->n_subpaths = 0;
        strk->n_vertices = 0;
    }
      }
      {
        register Dispatch *tbl = Table + tableindex;

        tbl->offset = 0;
        tbl->center = center;
        tbl->right = right;
      }
    count.path = -1;           /* initialize path counter, not to
                        * exceed n_subpath */
}

/* create standard spacing info for each glyph  */
std_space(l_bear, wide, r_bear)

    float l_bear,
          wide,
          r_bear;
{
    register Standard *tbl = sp_table +tableindex;
    tbl->std_left = l_bear;
    tbl->std_wide = wide;
    tbl->std_rght = r_bear;
}

/* initialize each sub_path */
init_path(close, n)
    int             close,
                    n;
{
    register Path_subpath *path;

    if (++count.path >= strokes[tableindex].n_subpaths)
        BYE(EXCEED_PATH);
    path = current_path = strokes[tableindex].subpaths + count.path;
    path->n_pts = n;
    path->closed = close;
    if (n > 0)
      path->pts.pt2df = (Path_point2df *)
                         malloc(n * sizeof (Path_point2df));
    if (path->pts.pt2df == NULL)
        BYE(NO_MEMORY);
    expect.point = path->n_pts;
    count.point = -1;           /* initialize point counter, not to
                        * exceed n_pts */
}

/* accumulating points for each sub_path */
add_point(x, y)
    float           x,
                    y;
{
    register Path_subpath   *path;
    register Path_point2df    *pt_ptr;

    path = current_path;
    if (++count.point >= path->n_pts)
        BYE(EXCEED_POINT);
    pt_ptr = path->pts.pt2df + count.point;
    pt_ptr->x = x;
    pt_ptr->y = y;
}

/* Path_type + n_subpaths + n_vertices */
#define STROKE_HEAD (sizeof (Path_type) + sizeof (int) + sizeof (int))

/* write out file, close everything, free everything */
fini()
{
    static long     zero = 0;

    /* pointers used to walk the arrays */
    register Path_subpath *spath;
    register Dispatch *tbl_ptr;
    register Path  *strptr;
    register Property *prop_ptr;

    FILE           *fp;
    int             npath;
    register int    i,
                    j,
            k;
    Standard    *sp_ptr;
    Path_point2df    *pt;

        printf("\n/* GENERATED FILE -- DO NOT MODIFY */\n\n");
        printf("#include \"glutstroke.h\"\n\n");

#    define BY_BYE(err) fclose(fp), BYE(err)

    /* adjust the characters for spacing, note max char width */
    head.max_width = 0.0;
    for (i = 0, tbl_ptr = Table, strptr = strokes, sp_ptr = sp_table;
             i < head.num_ch; i++, tbl_ptr++, strptr++, sp_ptr++) {
        tbl_ptr->center += sp_ptr->std_left;
        tbl_ptr->right += sp_ptr->std_left + sp_ptr->std_rght;
        if (tbl_ptr->right > head.max_width)
            head.max_width = tbl_ptr->right;
        npath = strptr->n_subpaths;
        if (npath > 0 || tbl_ptr->center != 0.0 ||
                    tbl_ptr->right != 0.0) {
            for (j = 0, spath = strptr->subpaths;
                             j < npath; j++, spath++) {
                for(k=0, pt = spath->pts.pt2df;
                     k<spath->n_pts; k++, pt++) {
                    pt->x += sp_ptr->std_left;
                }
            }
        }
    }

    /* write the stroke table */
    for (i = 0, tbl_ptr = Table, strptr = strokes;
         i < head.num_ch; i++, tbl_ptr++, strptr++) {
        if (strptr->n_subpaths > 0 &&
            tbl_ptr->center != 0.0 &&
            tbl_ptr->right != 0.0) {
            if(isprint(i)) {
                printf("/* char: %d '%c' */\n\n", i, i);
            } else {
                printf("/* char: %d */\n\n", i);
            }

            for (j = 0, spath = strptr->subpaths;
                 j < strptr->n_subpaths; j++, spath++) {
                int z;

                printf("static CoordRec char%d_stroke%d[] = {\n", i, j);
                for(z = 0; z < spath->n_pts; z++) {
                    printf("    { %g, %g },\n",
                        spath->pts.pt2df[z].x, spath->pts.pt2df[z].y);
                }
                printf("};\n\n");
            }

            printf("static StrokeRec char%d[] = {\n", i);
                        for (j = 0, spath = strptr->subpaths;
                             j < strptr->n_subpaths; j++, spath++) {
                printf("   { %d, char%d_stroke%d },\n",
                    spath->n_pts, i, j);
            }
            printf("};\n\n");
        }
    }
    printf("static StrokeCharRec chars[] = {\n");
    for (i = 0, tbl_ptr = Table, strptr = strokes;
         i < head.num_ch; i++, tbl_ptr++, strptr++) {
        if (strptr->n_subpaths > 0 &&
        tbl_ptr->center != 0.0 &&
        tbl_ptr->right != 0.0) {
        printf("    { %d, char%d, %g, %g },\n",
            strptr->n_subpaths, i, tbl_ptr->center, tbl_ptr->right);
        } else {
        printf("    { 0, /* char%d */ 0, %g, %g },\n",
            i, tbl_ptr->center, tbl_ptr->right);
        }
    }
    printf("};\n\n");

    printf("StrokeFontRec %s = { \"%s\", %d, chars, %.6g, %.6g };\n\n",
        symname, head.name, head.num_ch,
        (double) head.top, (double) head.bottom);

    fflush(stdout);

    freeall();
#    undef BY_BYE
}

freeall()
{
    register Path  *path;
    register Path_subpath *spath;
    register int    i,
                    j,
                    n;

    path = strokes;
    for (i = 0; i < head.num_ch; i++, path++) {
        n = path->n_subpaths;
        if (n <= 0)
            continue;
        spath = path->subpaths;
        for (j = 0; j < n; j++, spath++)
            if (spath->pts.pt2df != NULL)
                free((char *) spath->pts.pt2df);
        if (path->subpaths != NULL)
            free((char *) path->subpaths);
    }
    free(Table);
    free(sp_table);
    free(strokes);
    if (head.properties != NULL)
      free((char *) head.properties);
}

check_nstroke()
{
    count.path++;
    if (expect.path != count.path)
        BYE(PATH_MISMATCH);
}

check_npts()
{
    count.point++;
    if (expect.point != count.point)
        BYE(POINT_MISMATCH);
}