summaryrefslogtreecommitdiff
path: root/modules/om/generic/omTextExt.c
blob: 275df91cdb6d9f4c0952952f66ec8b7df1781537 (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
/* $Xorg: omTextExt.c,v 1.3 2000/08/17 19:45:22 cpqbld Exp $ */
/*
 * Copyright 1992, 1993 by TOSHIBA Corp.
 *
 * 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 name of TOSHIBA not be used in advertising
 * or publicity pertaining to distribution of the software without specific,
 * written prior permission. TOSHIBA make no representations about the
 * suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * TOSHIBA DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
 * TOSHIBA 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.
 *
 * Author: Katsuhisa Yano	TOSHIBA Corp.
 *			   	mopi@osa.ilab.toshiba.co.jp
 */
/* $XFree86: xc/lib/X11/omTextExt.c,v 1.6 2003/11/17 22:20:12 dawes Exp $ */

#include "Xlibint.h"
#include "XomGeneric.h"
#include <stdio.h>

int
_XomGenericTextExtents(
    XOC oc,
    XOMTextType type,
    XPointer text,
    int length,
    XRectangle *overall_ink,
    XRectangle *overall_logical)
{
    XlcConv conv;
    XFontStruct *font;
    Bool is_xchar2b;
    XPointer args[2];
    XChar2b xchar2b_buf[BUFSIZ], *buf;
    int direction, logical_ascent, logical_descent, tmp_ascent, tmp_descent;
    XCharStruct overall, tmp_overall;
    int buf_len, left;
    Bool first = True;

    conv = _XomInitConverter(oc, type);
    if (conv == NULL)
	return 0;

    bzero((char *) &overall, sizeof(XCharStruct));
    logical_ascent = logical_descent = 0;

    args[0] = (XPointer) &font;
    args[1] = (XPointer) &is_xchar2b;

    while (length > 0) {
	buf = xchar2b_buf;
	left = buf_len = BUFSIZ;

	if (_XomConvert(oc, conv, (XPointer *) &text, &length,
			(XPointer *) &buf, &left, args, 2) < 0)
	    break;
	buf_len -= left;

	if (is_xchar2b)
	    XTextExtents16(font, xchar2b_buf, buf_len, &direction,
			   &tmp_ascent, &tmp_descent, &tmp_overall);
	else
	    XTextExtents(font, (char *) xchar2b_buf, buf_len, &direction,
			 &tmp_ascent, &tmp_descent, &tmp_overall);

	if (first) {	/* initialize overall */
	    overall = tmp_overall;
	    logical_ascent = tmp_ascent;
	    logical_descent = tmp_descent;
	    first = False;
	} else {
	    overall.lbearing = min(overall.lbearing,
				   overall.width + tmp_overall.lbearing);
	    overall.rbearing = max(overall.rbearing,
				   overall.width + tmp_overall.rbearing);
	    overall.ascent = max(overall.ascent, tmp_overall.ascent);
	    overall.descent = max(overall.descent, tmp_overall.descent);
	    overall.width += tmp_overall.width;
	    logical_ascent = max(logical_ascent, tmp_ascent);
	    logical_descent = max(logical_descent, tmp_descent);
	}
    }

    if (overall_ink) {
	overall_ink->x = overall.lbearing;
	overall_ink->y = -(overall.ascent);
	overall_ink->width = overall.rbearing - overall.lbearing;
	overall_ink->height = overall.ascent + overall.descent;
    }

    if (overall_logical) {
	overall_logical->x = 0;
        overall_logical->y = -(logical_ascent);
	overall_logical->width = overall.width;
        overall_logical->height = logical_ascent + logical_descent;
    }

    return overall.width;
}

int
_XmbGenericTextExtents(XOC oc, _Xconst char *text, int length,
		       XRectangle *overall_ink, XRectangle *overall_logical)
{
    return _XomGenericTextExtents(oc, XOMMultiByte, (XPointer) text, length,
				  overall_ink, overall_logical);
}

int
_XwcGenericTextExtents(XOC oc, _Xconst wchar_t *text, int length,
		       XRectangle *overall_ink, XRectangle *overall_logical)
{
    return _XomGenericTextExtents(oc, XOMWideChar, (XPointer) text, length,
				  overall_ink, overall_logical);
}

int
_Xutf8GenericTextExtents(XOC oc, _Xconst char *text, int length,
			 XRectangle *overall_ink, XRectangle *overall_logical)
{
    return _XomGenericTextExtents(oc, XOMUtf8String, (XPointer) text, length,
				  overall_ink, overall_logical);
}