pods::SDL::Tutorial(3)User Contributed Perl Documentatiopods::SDL::Tutorial(3)NAME
SDL::Tutorial - introduction to Perl SDL
CATEGORY
Tutorials
SYNOPSIS
# to read this tutorial
$ perldoc SDL::Tutorial
# to run this tutorial
$ perl -MSDL::Tutorial -e 1
SDL Manual
"SDL::Tutorial" are incomplete and old. A new book has been started to
provide a complete tutorial for SDL. See <http://bit.ly/hvxc9V>.
SDL BASICS
SDL, the Simple DirectMedia Layer, is a cross-platform multimedia
library. These are the Perl 5 bindings. You can find out more about
SDL at <http://www.libsdl.org/>. You can find out more about SDL perl
at <http://sdl.perl.org>.
Creating an SDL application with Perl is easy. You have to know a few
basics, though. Here's how to get up and running as quickly as
possible.
Surfaces
All graphics in SDL live on a surface. You'll need at least one.
That's what SDLx::App provides.
Of course, before you can get a surface, you need to initialize your
video mode. SDL gives you several options, including whether to run in
a window or take over the full screen, the size of the window, the bit
depth of your colors, and whether to use hardware acceleration. For
now, we'll build something really simple.
Initialization
SDLx::App makes it easy to initialize video and create a surface.
Here's how to ask for a windowed surface with 640x480x16 resolution:
use SDLx::App;
my $app = SDLx::App->new(
width => 640,
height => 480,
depth => 16,
);
You can get more creative, especially if you use the "title" and "icon"
attributes in a windowed application. Here's how to set the window
title of the application to "My SDL Program":
use SDLx::App;
my $app = SDLx::App->new(
height => 640,
width => 480,
depth => 16,
title => 'My SDL Program',
);
Setting an icon is a little more involved -- you have to load an image
onto a surface. That's a bit more complicated, but see the "name"
parameter to "SDL::Surface-"new()> if you want to skip ahead.
Working With The App
Since $app from the code above is just an SDL surface with some extra
sugar, it behaves much like SDL::Surface. In particular, the all-
important "blit" and "update" methods work. You'll need to create
SDL::Rect objects representing sources of graphics to draw onto the
$app's surface, "blit" them there, then "update" the $app.
Note: "blitting" is copying a chunk of memory from one place to
another.
That, however, is another tutorial.
SEE ALSO
SDL::Tutorial::Animation
basic rectangle drawing and animation
SDL::Tutorial::LunarLander
basic image loading and animation
AUTHORS
chromatic, <chromatic@wgz.org>.
Written for and maintained by the Perl SDL project,
<http://sdl.perl.org/>. See "AUTHORS" in SDL for details.
COPYRIGHT
Copyright (c) 2003 - 2004, chromatic. 2009 - 2010, kthakore. All
rights reserved. This module is distributed under the same terms as
Perl itself, in the hope that it is useful but certainly under no
guarantee.
perl v5.18.1 2013-09-28 pods::SDL::Tutorial(3)
