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
|
/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. All rights reserved. This file is distributed */
/* under the terms of the GNU Library General Public License. */
/* */
/***********************************************************************/
/* $Id$ */
#include "libgraph.h"
#include <alloc.h>
XFontStruct * grfont = NULL;
static void gr_font(char *fontname)
{
XFontStruct * font = XLoadQueryFont(grdisplay, fontname);
if (font == NULL) gr_fail("cannot find font %s", fontname);
if (grfont != NULL) XFreeFont(grdisplay, grfont);
grfont = font;
XSetFont(grdisplay, grwindow.gc, grfont->fid);
XSetFont(grdisplay, grbstore.gc, grfont->fid);
}
value gr_set_font(value fontname)
{
gr_check_open();
gr_font(String_val(fontname));
return Val_unit;
}
value gr_set_text_size (value sz)
{
return Val_unit;
}
static void gr_draw_text(char *txt, int len)
{
if (grfont == NULL) gr_font(DEFAULT_FONT);
XDrawString(grdisplay, grwindow.win, grwindow.gc,
grx, Wcvt(gry) - grfont->descent + 1, txt, len);
XDrawString(grdisplay, grbstore.win, grbstore.gc,
grx, Bcvt(gry) - grfont->descent + 1, txt, len);
grx += XTextWidth(grfont, txt, len);
XFlush(grdisplay);
}
value gr_draw_char(value chr)
{
char str[1];
gr_check_open();
str[0] = Int_val(chr);
gr_draw_text(str, 1);
return Val_unit;
}
value gr_draw_string(value str)
{
gr_check_open();
gr_draw_text(String_val(str), string_length(str));
return Val_unit;
}
value gr_text_size(value str)
{
int width;
value res;
gr_check_open();
if (grfont == NULL) gr_font(DEFAULT_FONT);
width = XTextWidth(grfont, String_val(str), string_length(str));
res = alloc_small(2, 0);
Field(res, 0) = Val_int(width);
Field(res, 1) = Val_int(grfont->ascent + grfont->descent);
return res;
}
|
