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
|
<!doctype HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Other</title>
<link rel="stylesheet" type="text/css" href="../../style.css">
</head>
<body>
<h2 align="center">System</h2>
<pre class="function"><span class="mainFunction">char* <a name="cdVersion">cdVersion</a>(void); [in C]</span>
cd.Version() -> (version: string) [in Lua]</pre>
<p>Returns the current version number of the library. The string with the
version number has a format "<font>major.minor.build</font>".
For instance, the string "2.1.3" has number 2 as the main (major) version
number, 1 as the secondary (minor) version number, and 3 as the build number.
The major version number represents a change in the structure or behavior of
functions; the minor version number represents one or more new drivers and
functions added to the library; and the build version number represents one or
more corrected bugs.</p>
<pre class="function"><span class="mainFunction">char* cdVersionDate(void); [in C]
</span>
cd.VersionDate() -> (versiondate: string) [in Lua]</pre>
<p>Returns the release date of the current version of the library.</p>
<pre class="function"><span class="mainFunction">int cdVersionNumber(void); [in C]
</span>
cd.VersionNumber() -> (version: number) [in Lua]</pre>
<p>Returns the current version number of the library.</p>
<pre class="function">[in C]
<span class="mainFunction">CD_NAME</span> "CD - Canvas Draw"
<span class="mainFunction">CD_DESCRIPTION</span> "A 2D Graphics Library"
<span class="mainFunction">CD_COPYRIGHT</span> "Copyright (C) 1994-2007 Tecgraf/PUC-Rio and PETROBRAS S/A"
<span class="mainFunction">CD_VERSION</span> "5.0.0"
<span class="mainFunction">CD_VERSION_DATE</span> "2007/04/09"
<span class="mainFunction">CD_VERSION_NUMBER</span> 500000
[in Lua]
cd._NAME
cd._DESCRIPTION
cd._COPYRIGHT
cd._VERSION
cd._VERSION_DATE
cd._VERSION_NUMBER</pre>
<p>Usefull definitions. They have the same value returned by <b>cdVersion</b>*
functions.</p>
<hr>
<h2 align="center">Metafile Interpretation</h2>
<pre class="function"><span class="mainFunction">int cdCanvasPlay(cdCanvas* canvas, cdContext* ctx, int xmin, int xmax, int ymin, int ymax, void *data); [in C]</span>
canvas:Play(ctx, xmin, xmax, ymin, ymax: number, data: string) -> (status: number) [in Lua]</pre>
<p>Interprets the graphical contents (primitives and attributes) in a given
driver and calls equivalent functions of the CD library using the given
canvas. The primitives are drawn inside the region defined by the given
limits. If <font>limits are 0 (xmin</font>, <font>xmax</font>,
<font>ymin</font> and <font>ymax)</font> the primitives will be drawn with their coordinates having the original
values in the file. </p>
<p>Only some drivers implement this function:</p>
<ul>
<li><a href="../drv/clipbd.html"><b>
CD_CLIPBOARD</b></a> = Clipboard, <font>data</font> is
ignored. </li>
<li><a href="../drv/wmf.html"><b>
CD_WMF</b></a> = Windows Metafile, <font>data</font> is
a <b>char*</b> for the string ''<i>filename</i>''. Works only in
the MS Windows system.</li>
<li><a href="../drv/emf.html"><b>
CD_EMF</b></a> = Windows Enhanced Metafile, <font>data</font>
is a <b>char*</b> for the string ''<i>filename</i>''. Works only in
the MS Windows system.</li>
<li><a href="../drv/cgm.html"><b>
CD_CGM</b></a> = Computer Graphics Metafile ISO, <font>
data</font> is a <b>char*</b> for the string ''<i>filename</i>''.</li>
<li><a href="../drv/mf.html"><b>
CD_METAFILE</b></a> = CD Metafile, <font>data</font>
is a <b>char*</b> for the string ''<i>filename</i>''.</li>
<li><a href="../drv/picture.html"><b>
CD_PICTURE</b></a> = CD Picture, <font>data</font>
is a <strong>cdCanvas</strong><b>*</b> of the Picture canvas.</li>
</ul>
<pre class="function"><span class="mainFunction">int cdContextRegisterCallback(cdContext *ctx, int cb, int(*func)(cdCanvas* canvas, ...)); [in C]</span>
cd.ContextRegisterCallback(ctx, cb: number, func: function) -> (status: number) [in Lua]</pre>
<p>Used to customize the behavior of the <b><font>Play</font></b>
function. If you register a known callback function, it will be called during
the processing loop of <font>cdPlay</font>.</p>
<p>The callback should return <font>CD_CONTINUE</font>, if it
returns <font>CD_ABORT</font>, the <font>cdPlay</font>
function is aborted. The callback identifiers of a given driver must be in the
header file relative to that driver, with prefix "<font>CD_XXYYYCB</font>",
where <font>XX</font> identifies that driver and
<font>YYY</font> identifies the callback name.</p>
<p>There is a default callback common to all implementations of
<font>cdPlay</font>, <b>CD_SIZECB</b>. Its definition
is:</p>
<pre>int cdResizeCB(cdCanvas* canvas, int width, int height, double mm_width, double mm_height)</pre>
<p>It returns the size of the image in the
file before any function in the CD library is called, so that you can call the
<font>cdPlay</font> function without an active canvas and
create the canvas inside the callback. It works as a <b>
<font>cdCanvasGetSize</font></b> function.</p>
</body>
</html>
|
