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
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- Copyright (C) 2017-2020 David Thompson davet@gnu.org
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3
or any later version published by the Free Software Foundation;
with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
A copy of the license is included in the section entitled "GNU
Free Documentation License".
A copy of the license is also available from the Free Software
Foundation Web site at http://www.gnu.org/licenses/fdl.html.
* Chickadee: (chickadee). Game programming toolkit for Guile.
The document was typeset with
http://www.texinfo.org/ (GNU Texinfo).
-->
<!-- Created by GNU Texinfo 6.6, http://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Fonts (The Chickadee Game Toolkit)</title>
<meta name="description" content="Fonts (The Chickadee Game Toolkit)">
<meta name="keywords" content="Fonts (The Chickadee Game Toolkit)">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<link href="index.html#Top" rel="start" title="Top">
<link href="Index.html#Index" rel="index" title="Index">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="Graphics.html#Graphics" rel="up" title="Graphics">
<link href="Particles.html#Particles" rel="next" title="Particles">
<link href="Lines-and-Shapes.html#Lines-and-Shapes" rel="prev" title="Lines and Shapes">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.indentedblock {margin-right: 0em}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
kbd {font-style: oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
span.nolinebreak {white-space: nowrap}
span.roman {font-family: initial; font-weight: normal}
span.sansserif {font-family: sans-serif; font-weight: normal}
ul.no-bullet {list-style: none}
@media (min-width: 1140px) {
body {
margin-left: 14rem;
margin-right: 4rem;
max-width: 52rem;
}
}
@media (min-width: 800px) and (max-width: 1140px) {
body {
margin-left: 6rem;
margin-right: 4rem;
max-width: 52rem;
}
}
@media (max-width: 800px) {
body {
margin: 1rem;
}
}
-->
</style>
<link rel="stylesheet" type="text/css" href="https://dthompson.us/css/dthompson.css">
</head>
<body lang="en">
<span id="Fonts"></span><div class="header">
<p>
Next: <a href="Particles.html#Particles" accesskey="n" rel="next">Particles</a>, Previous: <a href="Lines-and-Shapes.html#Lines-and-Shapes" accesskey="p" rel="prev">Lines and Shapes</a>, Up: <a href="Graphics.html#Graphics" accesskey="u" rel="up">Graphics</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<span id="Fonts-1"></span><h4 class="subsection">2.3.6 Fonts</h4>
<p>Printing text to the screen is quite easy:
</p>
<div class="example">
<pre class="example">(draw-text "Hello, world" (vec2 100.0 100.0))
</pre></div>
<p>Chickadee loads and renders bitmap fonts in the
<a href="http://www.angelcode.com/products/bmfont/doc/file_format.html">Angel Code format</a>. A default font named “Good Neighbors” is
built-in to Chickadee and is used for all text rendering operations
where a font is not specified, as is the case in the above example.
</p>
<p>The following procedures can be found in the <code>(chickadee render
font)</code> module:
</p>
<dl>
<dt id="index-load_002dfont">Procedure: <strong>load-font</strong> <em>file</em></dt>
<dd><p>Load the Angel Code font (in either XML or FNT format) in <var>file</var>
and return a new font object.
</p></dd></dl>
<dl>
<dt id="index-font_003f">Procedure: <strong>font?</strong> <em>obj</em></dt>
<dd><p>Return <code>#t</code> if <var>obj</var> is a font object.
</p></dd></dl>
<dl>
<dt id="index-font_002dface">Procedure: <strong>font-face</strong> <em>font</em></dt>
<dd><p>Return the name of <var>font</var>.
</p></dd></dl>
<dl>
<dt id="index-font_002dline_002dheight">Procedure: <strong>font-line-height</strong> <em>font</em></dt>
<dd><p>Return the line height of <var>font</var>.
</p></dd></dl>
<dl>
<dt id="index-font_002dline_002dheight-1">Procedure: <strong>font-line-height</strong> <em>font</em></dt>
<dd><p>Return the line height of <var>font</var>.
</p></dd></dl>
<dl>
<dt id="index-font_002dbold_003f">Procedure: <strong>font-bold?</strong> <em>font</em></dt>
<dd><p>Return <code>#t</code> if <var>font</var> is a bold font.
</p></dd></dl>
<dl>
<dt id="index-font_002ditalic_003f">Procedure: <strong>font-italic?</strong> <em>font</em></dt>
<dd><p>Return <code>#t</code> if <var>font</var> is an italicized font.
</p></dd></dl>
<dl>
<dt id="index-draw_002dtext">Procedure: <strong>draw-text</strong> <em>text position</em></dt>
<dd><p>[#:font] [#:origin] [#:scale] [#:rotation] [#:blend-mode]
[#:start 0] [#:end <code>(string-length text)</code>]
</p>
<p>Draw the string <var>text</var> with the first character starting at
<var>position</var> using <var>font</var>. If <var>font</var> is not specified, a
built-in font is used.
</p>
<div class="example">
<pre class="example">(draw-text "Hello, world!" (vec2 128.0 128.0))
</pre></div>
<p>To render a substring of <var>text</var>, use the <var>start</var> and <var>end</var>
arguments.
</p>
<p>Refer to <code>draw-sprite</code> (see <a href="Sprites.html#Sprites">Sprites</a>) for information about
the other arguments.
</p></dd></dl>
</body>
</html>
|
