/ 
SDL-2.500
River stage two • 23 direct dependents • 25 total dependents
/ SDL

NAME

SDL - Simple DirectMedia Layer for Perl

CATEGORY

Core

SYNOPSIS

use SDL;

DESCRIPTION

SDL_perl is a package of Perl modules that provide both functional and object oriented interfaces to the Simple DirectMedia Layer for Perl 5. This package takes some liberties with the SDL API, and attempts to adhere to the spirit of both the SDL and Perl. This document describes the low-level functional SDL Perl API. For the object oriented programming interface please see the documentation provided on a per-class basis.

CONSTANTS

The constants are not exported by default. You can export them by doing:

use SDL ':all';

or access them directly:

SDL::SDL_INIT_AUDIO;

or by choosing the export tags below:

Export tag: ':init'

SDL_INIT_AUDIO
SDL_INIT_VIDEO
SDL_INIT_CDROM
SDL_INIT_EVERYTHING
SDL_INIT_NOPARACHUTE
SDL_INIT_JOYSTICK
SDL_INIT_TIMER

METHODS

init

SDL::init( $flags );

As with the C language API, SDL Perl initializes the SDL environment with the SDL::init subroutine. This routine takes a mode flag constructed through the bitwise OR product of the SDL_INIT_* constants. The $flags tell SDL::init which subsystems to initialize.

SDL::init(SDL_INIT_AUDIO | SDL_INIT_JOYSTICK);

SDL::init returns 0 on success, or -1 on error.

init_subsystem

SDL::init_subsystem( $flags );

After SDL has been initialized with SDL::init you may initialize any uninitialized subsystems with SDL::init_subsystem. The $flags tell SDL::init_subsystem which subsystems to initialize, and are taken in the same way as SDL::init.

SDL::init_subsystem returns 0 on success, or -1 on error.

quit_subsystem

SDL::quit_subsystem( $flags );

SDL::quit_subsystem allows you to shut down a subsystem that has been previously initialized by SDL::init or SDL::init_subsystem. The $flags tell SDL::quit_subsystem which subsystems to shut down, and are taken in the same way as SDL::init.

SDL::quit_subsystem doesn't return any values.

quit

SDL::quit;

SDL::quit Shuts down all SDL subsystems, unloads the dynamically linked library and frees the allocated resources.

Note: This will be called automatically when Perl exits. You don't need to call this, except if you want to initialize SDL again after this.

SDL::quit doesn't return any values.

was_init

my $flags = SDL::was_init( $flags );

SDL::was_init allows you to see which SDL subsytems have been initialized. The $flags tell SDL::was_init which subsystems to check, and are taken in the same way as SDL::init.

SDL::was_init returns a mask of the initialized subsystems it checks. If $flags is 0 or SDL_INIT_EVERYTHING, a mask of all initialized subsystems will be returned (this does not include SDL_INIT_EVENTTHREAD or SDL_INIT_NOPARACHUTE).

use SDL ':all';

my $mask = SDL::was_init(SDL_INIT_AUDIO | SDL_INIT_JOYSTICK);
if($mask & SDL_INIT_AUDIO and $mask & SDL_INIT_JOYSTICK) {
    # Both subsystems are initialized!
}

get_error

my $error = SDL::get_error;

Returns a scalar value containing the last error message set by the SDL library (if any).

set_error_real

SDL::set_error_real( $printf_format, @values )

SDL::set_error_real sets the SDL error to a printf style formatted string.

SDL::set_error_real doesn't return any values.

clear_error

SDL::clear_error;

SDL::clear_error deletes all information about the last SDL error. This is useful if the error has been handled by the program.

SDL::clear_error doesn't return any values.

version

my $version = SDL::version;

Returns an SDL::Version object of the SDL library at compile-time.

use SDL;
use SDL::Version;

my $v = SDL::version;
printf("got version: %d.%d.%d\n", $v->major, $v->minor, $v->patch);

linked_version

SDL::linked_version works in the same way as SDL::version, but returns an SDL::Version object of the SDL library at link-time.

get_ticks

my $ticks = SDL::get_ticks;

Returns the number of milliseconds since SDL library initialization. This value wraps around if the program runs for more than 49.7 days

delay

SDL::delay( $ms );

SDL::delay waits the specified number of milliseconds before returning. The actual delay may be longer than specified depending on the underlying OS.

SDL::delay doesn't return anything.

# Delay for half a second
SDL::delay(500);

AUTHOR

magnet, kthakore, Blaizer