SDLx::App - a SDL perl extension
Extension
use SDL; use SDLx::App; use SDL::Event; use SDL::Events; my $app = SDLx::App->new( title => 'Application Title', width => 640, height => 480, depth => 32 );
This is the manual way of doing things
my $event = SDL::Event->new; # create a new event SDL::Events::pump_events(); while ( SDL::Events::poll_event($event) ) { my $type = $event->type(); # get event type print $type; exit if $type == SDL_QUIT; }
An alternative to the manual Event processing is the SDLx::App::loop .
SDLx::App controls the root window of the of your SDL based application. It extends the SDL::Surface class, and provides an interface to the window manager oriented functions.
SDLx::App::new initializes the SDL, creates a new screen, and initializes some of the window manager properties. SDLx::App::new takes a series of named parameters:
SDLx::App::new
title
icon_title
icon
width
height
depth
flags
resizeable
SDLx::App::title takes 0, 1, or 2 arguments. It returns the current application window title. If one parameter is passed, both the window title and icon title will be set to its value. If two parameters are passed the window title will be set to the first, and the icon title to the second.
SDLx::App::title
SDLx::App::delay takes 1 argument, and will sleep the application for that many ms.
SDLx::App::delay
SDLx::App::ticks returns the number of ms since the application began.
SDLx::App::ticks
SDLx::App::error returns the last error message set by the SDL.
SDLx::App::error
SDLx::App::resize takes a new height and width of the application if the application was originally created with the resizable option.
SDLx::App::resize
SDLx::App::fullscreen toggles the application in and out of fullscreen mode.
SDLx::App::fullscreen
SDLx::App::iconify iconifies the applicaiton window.
SDLx::App::iconify
SDLx::App::grab_input can be used to change the input focus behavior of the application. It takes one argument, which should be one of the following:
SDLx::App::grab_input
SDL_GRAB_QUERY
SDL_GRAB_ON
SDL_GRAB_OFF
SDLx::App::loop is a simple event loop method which takes a reference to a hash of event handler subroutines. The keys of the hash must be SDL event types such as SDL_QUIT(), SDL_KEYDOWN(), and the like. The event method recieves as its parameter the event object used in the loop.
SDLx::App::loop
Example:
my $app = SDLx::App->new( title => "test.app", width => 800, height => 600, depth => 32 ); my %actions = ( SDL_QUIT() => sub { exit(0); }, SDL_KEYDOWN() => sub { print "Key Pressed" }, ); $app->loop( \%actions );
SDLx::App::sync encapsulates the various methods of syncronizing the screen with the current video buffer. SDLx::App::sync will do a fullscreen update, using the double buffer or OpenGL buffer if applicable. This is prefered to calling flip on the application window.
SDLx::App::sync
SDLx::App::attribute allows one to set and get GL attributes. By passing a value in addition to the attribute selector, the value will be set. SDL:::App::attribute always returns the current value of the given attribute, or croaks on failure.
SDLx::App::attribute
SDL:::App::attribute
David J. Goehrig Kartik Thakore
perl SDL::Surface SDL::Event SDL::OpenGL
To install SDL, copy and paste the appropriate command in to your terminal.
cpanm
cpanm SDL
CPAN shell
perl -MCPAN -e shell install SDL
For more information on module installation, please visit the detailed CPAN module installation guide.