summaryrefslogtreecommitdiff
path: root/Build/source/texk/ttfdump/libttf/kern.c
blob: 79e8cb6ebd3563f017e7ccf7b5539b00299a5549 (plain)
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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
/* kern.c -- Kerning Table
 * Copyright (C) 1996 Li-Da Lho, All right reserved 
 */
#include <stdio.h>
#include <stdlib.h>
#include "config.h"
#include "ttf.h"
#include "ttfutil.h"

#ifdef MEMCHECK
#include <dmalloc.h>
#endif

/* 	$Id: kern.c,v 1.1.1.1 1998/06/05 07:47:52 robert Exp $	 */

#ifndef lint
static char vcid[] = "$Id: kern.c,v 1.1.1.1 1998/06/05 07:47:52 robert Exp $";
#endif /* lint */

static KERNPtr ttfAllocKERN(TTFontPtr font);
static void ttfLoadKERN(FILE *fp,KERNPtr kern,ULONG offset);

void ttfInitKERN(TTFontPtr font)
{
    ULONG tag = 'k' | 'e' << 8 | 'r' << 16 | 'n' << 24;
    TableDirPtr ptd;
     
    if ((ptd = ttfLookUpTableDir(tag,font)) != NULL)
	{
	    font->kern = ttfAllocKERN(font);
	    ttfLoadKERN(font->fp,font->kern,ptd->offset);
	}
}
static KERNPtr ttfAllocKERN(TTFontPtr font)
{
    KERNPtr kern;
    
    if ((kern = (KERNPtr) calloc(1,sizeof(KERN))) == NULL)
	{
	    ttfError("Out of Memory in __FILE__:__LINE__\n");
	    return NULL;
	}
    return kern;
}
static void ttfLoadKERN (FILE *fp,KERNPtr kern,ULONG offset)
{
    int i;

    if (fseek(fp,offset,SEEK_SET) !=0)
	ttfError("Fseek Failed in ttfLoadKERN \n");	
    
    kern->version = ttfGetUSHORT(fp);
    kern->nTables = ttfGetUSHORT(fp);

    kern->subtable = (KernSubtable *) calloc(kern->nTables,
						 sizeof(KernSubtable));

    for (i=0;i<kern->nTables;i++)
	{
	    struct kernpair *pairs;
	    int j,n;
	    (kern->subtable+i)->version = ttfGetUSHORT(fp);
	    (kern->subtable+i)->length = ttfGetUSHORT(fp);
	    (kern->subtable+i)->coverage = ttfGetUSHORT(fp);

	    switch ((kern->subtable+i)->coverage >> 8)
		{
		case 0:
		    (kern->subtable+i)->kern.kern0.nPairs = n = 
			ttfGetUSHORT(fp);
		    (kern->subtable+i)->kern.kern0.searchRange =
			ttfGetUSHORT(fp);
		    (kern->subtable+i)->kern.kern0.entrySelector =
			ttfGetUSHORT(fp);
		    (kern->subtable+i)->kern.kern0.rangeShift =
			ttfGetUSHORT(fp);
		    (kern->subtable+i)->kern.kern0.pairs = pairs =
			(struct kernpair *) calloc(n,sizeof (struct kernpair));

		    for (j=0;j<n;j++)
			{
			    (pairs+j)->left = ttfGetUSHORT(fp);
			    (pairs+j)->right = ttfGetUSHORT(fp);
			    (pairs+j)->value = ttfGetFWord(fp);
			}
		    break;
		case 2:
		    /* not implemented yet */
		    break;
		default:
		    /* do nothing */
		    break;
		}
	}
}

void ttfPrintKERN(FILE *fp,KERNPtr kern)
{
    int i;
    
    fprintf(fp,"'kern' Table - Kerning Data\n");
    fprintf(fp,"---------------------------\n");
    fprintf(fp,"'kern' Version:\t %d\n", kern->version);
    fprintf(fp,"Number of subtables:\t %d\n\n",kern->nTables);

    for (i=0;i<kern->nTables;i++)
	{
	    struct kernpair *pairs;
	    int j,n;

	    fprintf(fp,"\t Subtable format \t %d\n",
		    (kern->subtable+i)->coverage >> 8);
	    fprintf(fp,"\t Subtable version \t %d\n",
		    (kern->subtable+i)->version);
	    fprintf(fp,"\t Bytes in subtable \t %d\n",
		    (kern->subtable+i)->length);
	    fprintf(fp,"\t Coverage bits \t 0x%x \n",
		    (kern->subtable+i)->coverage);
	    switch ((kern->subtable+i)->coverage >> 8)
		{
		case 0:
		    n = (kern->subtable+i)->kern.kern0.nPairs;
		    pairs = (kern->subtable+i)->kern.kern0.pairs;

		    fprintf(fp,"\t Number of pairs %d\n",n);
		    fprintf(fp,"\t Search Range    %d\n",
			    (kern->subtable+i)->kern.kern0.searchRange);
		    fprintf(fp,"\t Entry Selector  %d\n",
			    (kern->subtable+i)->kern.kern0.entrySelector);
		    fprintf(fp,"\t Range Shift     %d\n",
			    (kern->subtable+i)->kern.kern0.rangeShift);

		    fprintf(fp,"\t Left Glyph \t Right Glyph \t Kern Move\n");
		    fprintf(fp,"\t ---------- \t ----------- \t ---------\n");

		    for (j=0;j<n;j++)
			{
			    fprintf(fp,"\t\t %d \t\t %d \t\t %d\n",
				    (pairs+j)->left,(pairs+j)->right,
				    (pairs+j)->value);
			}
		    break;
		case 2:
		    /* not implemented yet */
		    break;
		default:
		    /* do nothing */
		    break;
		}
	    fprintf(fp,"\n");
	}

}

void ttfFreeKERN(KERNPtr kern)
{
    int i;
    
    if (kern != NULL)
	{
	    for (i=0;i<kern->nTables;i++)
		{
		    switch ((kern->subtable+i)->coverage >> 8)
			{
			case 0:
			    free((kern->subtable+i)->kern.kern0.pairs);
			     break;
			case 2:
			    /* not implemented yet */
			    break;
			default:
			    /* do nothing */
			    break;
			}
		}
	    free(kern->subtable);
	    free(kern);
	}
}