1SDL::Tutorial(3)      User Contributed Perl Documentation     SDL::Tutorial(3)
2
3
4

NAME

6       SDL::Tutorial - introduction to Perl SDL
7

SYNOPSIS

9               # to read this tutorial
10               $ perldoc SDL::Tutorial
11
12               # to create a bare-bones SDL app based on this tutorial
13               $ perl -MSDL::Tutorial=basic_app.pl -e 1
14

SDL BASICS

16       SDL, the Simple DirectMedia Layer, is a cross-platform multimedia
17       library.  These are the Perl 5 bindings.  You can find out more about
18       SDL at <http://www.libsdl.org/>.
19
20       Creating an SDL application with Perl is easy.  You have to know a few
21       basics, though.  Here's how to get up and running as quickly as possi‐
22       ble.
23
24       Surfaces
25
26       All graphics in SDL live on a surface.  You'll need at least one.
27       That's what SDL::App provides.
28
29       Of course, before you can get a surface, you need to initialize your
30       video mode.  SDL gives you several options, including whether to run in
31       a window or take over the full screen, the size of the window, the bit
32       depth of your colors, and whether to use hardware acceleration.  For
33       now, we'll build something really simple.
34
35       Initialization
36
37       SDL::App makes it easy to initialize video and create a surface.
38       Here's how to ask for a windowed surface with 640x480x16 resolution:
39
40               use SDL::App;
41
42               my $app = SDL::App->new(
43                       -width  => 640,
44                       -height => 480,
45                       -depth  => 16,
46               );
47
48       You can get more creative, especially if you use the "-title" and
49       "-icon" attributes in a windowed application.  Here's how to set the
50       window title of the application to "My SDL Program":
51
52               use SDL::App;
53
54               my $app = SDL::App->new(
55                       -height => 640,
56                       -width  => 480,
57                       -depth  => 16,
58                       -title  => 'My SDL Program',
59               );
60
61       Setting an icon is a little more involved -- you have to load an image
62       onto a surface.  That's a bit more complicated, but see the "-name"
63       parameter to "SDL::Surface-"new()> if you want to skip ahead.
64
65       Working With The App
66
67       Since $app from the code above is just an SDL surface with some extra
68       sugar, it behaves much like SDL::Surface.  In particular, the all-
69       important "blit" and "update" methods work.  You'll need to create
70       SDL::Rect objects representing sources of graphics to draw onto the
71       $app's surface, "blit" them there, then "update" the $app.
72
73       Note:  "blitting" is copying a chunk of memory from one place to
74       another.
75
76       That, however, is another tutorial.
77

SEE ALSO

79       SDL::Tutorial::Drawing
80           basic drawing with rectangles
81
82       SDL::Tutorial::Animation
83           basic rectangle animation
84
85       SDL::Tutorial::Images
86           image loading and animation
87

AUTHOR

89       chromatic, <chromatic@wgz.org>.
90
91       Written for and maintained by the Perl SDL project,
92       <http://sdl.perl.org/>.
93

95       Copyright (c) 2003 - 2004, chromatic.  All rights reserved.  This mod‐
96       ule is distributed under the same terms as Perl itself, in the hope
97       that it is useful but certainly under no guarantee.
98
99
100
101perl v5.8.8                       2006-08-28                  SDL::Tutorial(3)
Impressum