[sdlgit/SDL_perl.git] / lib / SDL / Surface.pm

#!/usr/bin/env perl
#
# Surface.pm
#
# Copyright (C) 2005 David J. Goehrig <dgoehrig@cpan.org>
#
# ------------------------------------------------------------------------------
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# 
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
# 
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
#
# ------------------------------------------------------------------------------
#
# Please feel free to send questions, suggestions or improvements to:
#
#	David J. Goehrig
#	dgoehrig@cpan.org
#

package SDL::Surface;

use strict;
use warnings;
use Carp;
use SDL;
use SDL::SFont;
use SDL::Color;
use SDL::Rect;

sub new {
	my $proto = shift;	
	my $class = ref($proto) || $proto;
	my %options = @_;
	my $self;

	verify (%options, qw/ -name -n -flags -fl -width -w -height -h -depth -d
				-pitch -p -Rmask -r -Gmask -g -Bmask -b -Amask -a
				-from -f /) if $SDL::DEBUG;
	
	if ( defined($options{-name}) && $options{-name} ne "" && exists $SDL::{IMGLoad} ) {		
	   $self = \SDL::IMGLoad($options{-name});	
	} else {
		my $f = $options{-flags}  	|| $options{-fl} 	|| SDL::SDL_ANYFORMAT();
		my $w = $options{-width} 	|| $options{-w}		|| 1;
		my $h = $options{-height} 	|| $options{-h}		|| 1;	
		my $d = $options{-depth} 	|| $options{-d}		|| 8;
		my $p = $options{-pitch} 	|| $options{-p}		|| $w*$d;              
		my $r = $options{-Rmask} 	|| $options{-r}	
			||  ( SDL::BigEndian() ? 0xff000000 : 0x000000ff );
		my $g = $options{-Gmask} 	|| $options{-g}
			||  ( SDL::BigEndian() ? 0x00ff0000 : 0x0000ff00 );
		my $b = $options{-Bmask} 	|| $options{-b}
			||  ( SDL::BigEndian() ? 0x0000ff00 : 0x00ff0000 );
		my $a = $options{-Amask} 	|| $options{-a}
			||  ( SDL::BigEndian() ? 0x000000ff : 0xff000000 );

		if ( $options{-from}|| $options{-f} ) { 
			my $src = $options{-from}|| $options{-f};
			$self = \SDL::CreateRGBSurfaceFrom($src,$w,$h,$d,$p,$r,$g,$b,$a);
		} else {
			$self = \SDL::CreateRGBSurface($f,$w,$h,$d,$r,$g,$b,$a);
		}
	}
	croak "SDL::Surface::new failed. ", SDL::GetError()
		unless ( $$self);
	bless $self,$class;
	return $self;
}

sub DESTROY {		
	SDL::FreeSurface(${$_[0]});
}

sub flags {
	SDL::SurfaceFlags(${$_[0]});
}

sub palette {
	SDL::SurfacePalette(${$_[0]});
}

sub bpp {
	SDL::SurfaceBitsPerPixel(${$_[0]});
}

sub bytes_per_pixel {
	SDL::SurfaceBytesPerPixel(${$_[0]});
}

sub Rshift {
	SDL::SurfaceRshift(${$_[0]});
}

sub Gshift {
	SDL::SurfaceGshift(${$_[0]});
}

sub Bshift {
	SDL::SurfaceBshift(${$_[0]});
}

sub Ashift {
	SDL::SurfaceAshift(${$_[0]});
}

sub Rmask {
	SDL::SurfaceRmask(${$_[0]});
}

sub Gmask {
	SDL::SurfaceGmask(${$_[0]});
}

sub Bmask {
	SDL::SurfaceBmask(${$_[0]});
}

sub Amask {
	SDL::SurfaceAmask(${$_[0]});
}

sub color_key {
	SDL::SurfaceColorKey(${$_[0]});
}

sub alpha {
	SDL::SurfaceAlpha(${$_[0]});
}

sub width {
	SDL::SurfaceW(${$_[0]});
}

sub height {
	SDL::SurfaceH(${$_[0]});
}

sub pitch {
	SDL::SurfacePitch(${$_[0]});
}

sub pixels {
	SDL::SurfacePixels(${$_[0]});
}

sub pixel {
	croak "SDL::Surface::pixel requires a SDL::Color"
		if $_[3] && $SDL::DEBUG && !$_[3]->isa("SDL::Color");
	$_[3] ?
		new SDL::Color -color => SDL::SurfacePixel(${$_[0]},$_[1],$_[2],${$_[3]}) :
		new SDL::Color -color => SDL::SurfacePixel(${$_[0]},$_[1],$_[2]);
}

sub fill {
	croak "SDL::Surface::fill requires a SDL::Rect object"
		unless !$SDL::DEBUG || $_[1] == 0 || $_[1]->isa('SDL::Rect');
	croak "SDL::Surface::fill requires a SDL::Color object"
		unless !$SDL::DEBUG || $_[2]->isa('SDL::Color');
	if ($_[1] == 0 ) {
		SDL::FillRect(${$_[0]},0,${$_[2]});
	} else {
		SDL::FillRect(${$_[0]},${$_[1]},${$_[2]});
	}
}

sub lockp {
	SDL::MUSTLOCK(${$_[0]});
}

sub lock {
	SDL::SurfaceLock(${$_[0]});
}

sub unlock {
	SDL::SurfaceUnlock(${$_[0]});
}

sub update {
	my $self = shift;;
	if ($SDL::DEBUG) {
		for (@_) { 
			croak "SDL::Surface::update requires SDL::Rect objects"
				unless $_->isa('SDL::Rect');
		}
	}
	SDL::UpdateRects($$self, map { ${$_} } @_ );
}

sub flip {
	SDL::Flip(${$_[0]});
}

sub blit {
		$_[1] = 0 unless defined $_[1];
		$_[3] = 0 unless defined $_[3];

	if ($SDL::DEBUG) {
		croak "SDL::Surface::blit requires SDL::Rect objects"
			unless ($_[1] == 0 || $_[1]->isa('SDL::Rect'))
			&& ($_[3] == 0 || $_[3]->isa('SDL::Rect'));
		croak "SDL::Surface::blit requires SDL::Surface objects"
			unless $_[2]->isa('SDL::Surface'); 
	}
		SDL::BlitSurface(map { (defined($_) && $_ != 0)? ${$_} : $_ } @_) if defined(@_);
}

sub set_colors {
	my $self = shift;
	my $start = shift;
	for (@_) {
		croak "SDL::Surface::set_colors requires SDL::Color objects"
			unless !$SDL::DEBUG || $_->isa('SDL::Color');
	}
	return SDL::SetColors($$self, $start, map { ${$_} } @_);
}

sub set_color_key {
	croak "SDL::Surface::set_color_key requires a SDL::Color object"
		unless !$SDL::DEBUG || (ref($_[2]) && $_[2]->isa('SDL::Color'));
	SDL::SetColorKey(${$_[0]},$_[1],${$_[2]});
}

sub set_alpha {
	SDL::SetAlpha(${$_[0]},$_[1],$_[2]);
}

sub display_format {
	my $self = shift;
	my $tmp = SDL::DisplayFormat($$self);
	SDL::FreeSurface ($$self);
	$$self = $tmp;
	$self;
}

sub rgb {
	my $self = shift;
	my $tmp = SDL::ConvertRGB($$self);
	SDL::FreeSurface($$self);
	$$self = $tmp;
	$self;
}

sub rgba {
	my $self = shift;
	my $tmp = SDL::ConvertRGBA($$self);
	SDL::FreeSurface($$self);
	$$self = $tmp;
	$self;
}

sub rect {
	my $self = shift;
	new SDL::Rect -width => $self->width(), -height => $self->height(),
			-x => $_[0] || 0, -y => $_[1] || 0;
}

sub print {
	my ($self,$x,$y,@text) = @_;
	SDL::SFont::PutString( $$self, $x, $y, join('',@text));
}

sub save_bmp {
	SDL::SaveBMP( ${$_[0]},$_[1]);
}

sub video_info {
	shift;
	SDL::VideoInfo();
}

1;

__END__;

=pod 

=head1 NAME

SDL::Surface - a SDL perl extension

=head1 SYNOPSIS

  use SDL::Surface;
  $image = new SDL::Surface(-name=>"yomama.jpg");

=head1 DESCRIPTION

The C<SDL::Surface> module encapsulates the SDL_Surface* structure, and
many of its ancillatory functions.  Not only is it a workhorse of the
OO Layer, it is the base class for the C<SDL::App> class.  
	
=head1 EXPORTS

	SDL_SWSURFACE		SDL_HWSURFACE
	SDL_ASYNCBLIT 		SDL_ANYFORMAT
	SDL_HWPALETTE 		SDL_DOUBLEBUF 
	SDL_FULLSCREEN		SDL_OPENGL 
	SDL_OPENGLBLIT		SDL_RESIZEABLE
	SDL_NOFRAME		SDL_SRCCOLORKEY
	SDL_RLEACCEL		SDL_SRCALPHA
	SDL_PREALLOC

=head1 METHODS

=head2 new (-name => 'foo.png')

The C<SDL::Surface> class can be instantiated in a number of different ways.
If support for the SDL_image library was included when SDL_perl was compiled,
the easiest way to create a new surface is to use the C<SDL::Surface::new>
method with the C<-name> option.  This will load the image from the file 
and return an object encapsulating the SDL_Surface*.

=head2 new (-from => $buffer, ... )

If the contents of the new Surface is already in memory, C<SDL::Surface::new>
may be called with the C<-from> option to create an image from that section
of memory.  This method takes the following additional parameters:

=over 4

=item *

-width		the width of the image in pixels

=item *

-height		the height of the image in pixels

=item *

-depth		the number of bits per pixel

=item *

-pitch		the number of bytes per line

=item *

-Rmask		an optional bitmask for red

=item *

-Gmask		an optional bitmask for green

=item *

-Bmask		an optional bitmask for green

=item *

-Amask		an optional bitmask for alpha

=back

=head2 new ( -flags => SDL_SWSURFACE, ... )

Finally, C<SDL::Suface::new> may be invoked with the C<-flags> option, in a
similar fashion to the C<-from> directive.  This invocation takes the same
additional options as C<-from> with the exception of C<-pitch> which is ignored.
This method returns a new, blank, SDL::Surface option with any of the following
flags turned on:

=over 4

=item *

SWSURFACE()	a non-accelerated surface

=item *

HWSURFACE()	a hardware accelerated surface 

=item *

SRCCOLORKEY()	a surface with a transperant color	

=item *

SRCALPHA()	an alpha blended, translucent surface 

=back

=head2 flags ()

C<SDL::Surface::flags> returns the flags with which the surface was initialized.

=head2 palette ()

C<SDL::Surface::palette> currently returns a SDL_Palette*, this may change in
future revisions.

=head2 bpp ()

C<SDL::Surface::bpp> returns the bits per pixel of the surface

=head2 bytes_per_pixel ()

C<SDL::Surface::bytes_per_pixel> returns the bytes per pixel of the surface

=head2 Rshift ()

C<SDL::Surface::Rshift> returns the bit index of the red field for the surface's pixel format

=head2 Gshift ()

C<SDL::Surface::Gshift> returns the bit index of the green field for the surface's pixel format

=head2 Bshift ()

C<SDL::Surface::Bshift> returns the bit index of the blue field for the surface's pixel format

=head2 Ashift ()

C<SDL::Surface::Ashift> returns the bit index of the alpha field for the surface's pixel format

=head2 Rmask ()

C<SDL::Surface::Rmask> returns the bit mask for the red field for teh surface's pixel format

=head2 Gmask ()

C<SDL::Surface::Gmask> returns the bit mask for the green field for teh surface's pixel format

=head2 Bmask ()

C<SDL::Surface::Bmask> returns the bit mask for the blue field for teh surface's pixel format

=head2 Amask ()

C<SDL::Surface::Amask> returns the bit mask for the alpha field for teh surface's pixel format

=head2 color_key ()

C<SDL::Surface::color_key> returns the current color key for the image, which can be set with
the C<SDL::Surface::set_color_key> method.  Before calling C<SDL::Surface::color_key> on 
a image, you should fist call C<SDL::Surface::display_format> to convert it to the same
format as the display.  Failure to do so will result in failure to apply the correct color_key.

=head2 alpha ()

C<SDL::Surface::alpha> returns the current alpha value for the image, which can be set with
the C<SDL::Surface::set_alpha> method.

=head2 width ()

C<SDL::Surface::width> returns the width in pixels of the surface

=head2 height ()

C<SDL::Surface::height> returns the height in pixels of the surface

=head2 pitch ()

C<SDL::Surface::pitch> returns the width of a surface's scanline in bytes

=head2 pixels ()

C<SDL::Surface::pixels> returns a Uint8* to the image's pixel data.  This is not
inherently useful within perl, though may be used to pass image data to user provided
C functions.

=head2 pixel (x,y,[color])

C<SDL::Surface::pixel> will set the color value of the pixel at (x,y) to the given
color if provided.  C<SDL::Surface::pixel> returns a SDL::Color object for the 
color value of the pixel at (x,y) after any possible modifications.

=head2 fill (rect,color)

C<SDL::Surface::fill> will fill the given SDL::Rect rectangle with the specified SDL::Color
This function optionally takes a SDL_Rect* and a SDL_Color*

=head2 lockp ()

C<SDL::Surface::lockp> returns true if the surface must be locked

=head2 lock ()

C<SDL::Surface::lock> places a hardware lock if necessary, preventing access to 
the surface's memory

=head2 unlock ()

C<SDL::Surface::unlock> removes any hardware locks, enabling blits

=head2 update ( rects...)

C<SDL::Surface::update> takes one or more SDL::Rect's which determine which sections
of the image are to be updated.  This option is only useful on the appliaction surface.

=head2 flip ()

C<SDL::Surface::flip> updates the full surface, using a double buffer if available

=head2 blit (srect,dest,drect)

C<SDL::Surface::blit> blits the current surface onto the destination surface,
according to the provided rectangles.  If a rectangle is 0, then the full surface is used.

=head2 set_colors (start,colors...) 

C<SDL::Surface::set_colors> updates the palette starting at index C<start> with the
supplied colors.  The colors may either be SDL::Color objects or SDL_Color* from the
low level C-style API.

=head2 set_color_key (flag,pixel) or (flag,x,y)

C<SDL::Surface::set_color_key> sets the blit flag, usually SDL_SRCCOLORKEY, 
to the specified L<SDL::Color> object.  Optional a SDL_Color* may be passed.

=head2 set_alpha (flag,alpha)

C<SDL::Surface::set_alpha> sets the opacity of the image for alpha blits. 
C<alpha> takes a value from 0x00 to 0xff.

=head2 display_format ()

C<SDL::Surface::display_format> converts the surface to the same format as the
current screen.

=head2 rgb ()
C<SDL::Surface::rgb> converts the surface to a 24 bit rgb format regardless of the 
initial format.

=head2 rgba ()
C<SDL::Surface::rgba> converts the surface to a 32 bit rgba format regarless of the
initial format.

=head2 print (x,y,text...)

C<SDL::Surface::print> renders the text using the current font onto the image.
This option is only supported for with SDL_image and SFont.

=head2 save_bmp (filename)

C<SDL::Surface::save_bmp> saves the surface to filename in Windows BMP format.

=head2 video_info ()

C<SDL::Surface::video_info> returns a hash describing the current state of the 
video hardware.

=head1 AUTHOR

David J. Goehrig

=head1 SEE ALSO

L<perl> L<SDL::App> L<SDL::Color> L<SDL::Palette> L<SDL::Rect> 

=cut
Commit	Line	Data
7b6a53a1	1	#!/usr/bin/env perl
	2	#
	3	# Surface.pm
	4	#
	5	# Copyright (C) 2005 David J. Goehrig <dgoehrig@cpan.org>
	6	#
	7	# ------------------------------------------------------------------------------
	8	#
	9	# This library is free software; you can redistribute it and/or
	10	# modify it under the terms of the GNU Lesser General Public
	11	# License as published by the Free Software Foundation; either
	12	# version 2.1 of the License, or (at your option) any later version.
8fde61e3	13	#
7b6a53a1	14	# This library is distributed in the hope that it will be useful,
	15	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	# Lesser General Public License for more details.
	18	#
	19	# You should have received a copy of the GNU Lesser General Public
	20	# License along with this library; if not, write to the Free Software
	21	# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	22	#
	23	# ------------------------------------------------------------------------------
	24	#
	25	# Please feel free to send questions, suggestions or improvements to:
8fde61e3	26	#
7b6a53a1	27	# David J. Goehrig
7b6a53a1	28	# dgoehrig@cpan.org
8fde61e3	29	#
8fde61e3	30
	31	package SDL::Surface;
	32
	33	use strict;
084b921f	34	use warnings;
084b921f	35	use Carp;
8fde61e3	36	use SDL;
	37	use SDL::SFont;
	38	use SDL::Color;
	39	use SDL::Rect;
	40
	41	sub new {
	42	my $proto = shift;
	43	my $class = ref($proto) \|\| $proto;
	44	my %options = @_;
	45	my $self;
	46
	47	verify (%options, qw/ -name -n -flags -fl -width -w -height -h -depth -d
	48	-pitch -p -Rmask -r -Gmask -g -Bmask -b -Amask -a
	49	-from -f /) if $SDL::DEBUG;
	50
	51	if ( defined($options{-name}) && $options{-name} ne "" && exists $SDL::{IMGLoad} ) {
	52	$self = \SDL::IMGLoad($options{-name});
	53	} else {
	54	my $f = $options{-flags} \|\| $options{-fl} \|\| SDL::SDL_ANYFORMAT();
	55	my $w = $options{-width} \|\| $options{-w} \|\| 1;
	56	my $h = $options{-height} \|\| $options{-h} \|\| 1;
	57	my $d = $options{-depth} \|\| $options{-d} \|\| 8;
	58	my $p = $options{-pitch} \|\| $options{-p} \|\| $w*$d;
	59	my $r = $options{-Rmask} \|\| $options{-r}
	60	\|\| ( SDL::BigEndian() ? 0xff000000 : 0x000000ff );
	61	my $g = $options{-Gmask} \|\| $options{-g}
	62	\|\| ( SDL::BigEndian() ? 0x00ff0000 : 0x0000ff00 );
	63	my $b = $options{-Bmask} \|\| $options{-b}
	64	\|\| ( SDL::BigEndian() ? 0x0000ff00 : 0x00ff0000 );
	65	my $a = $options{-Amask} \|\| $options{-a}
	66	\|\| ( SDL::BigEndian() ? 0x000000ff : 0xff000000 );
	67
	68	if ( $options{-from}\|\| $options{-f} ) {
	69	my $src = $options{-from}\|\| $options{-f};
	70	$self = \SDL::CreateRGBSurfaceFrom($src,$w,$h,$d,$p,$r,$g,$b,$a);
	71	} else {
	72	$self = \SDL::CreateRGBSurface($f,$w,$h,$d,$r,$g,$b,$a);
	73	}
	74	}
084b921f	75	croak "SDL::Surface::new failed. ", SDL::GetError()
8fde61e3	76	unless ( $$self);
	77	bless $self,$class;
	78	return $self;
	79	}
	80
	81	sub DESTROY {
	82	SDL::FreeSurface(${$_[0]});
	83	}
	84
	85	sub flags {
	86	SDL::SurfaceFlags(${$_[0]});
	87	}
	88
	89	sub palette {
	90	SDL::SurfacePalette(${$_[0]});
	91	}
	92
	93	sub bpp {
	94	SDL::SurfaceBitsPerPixel(${$_[0]});
	95	}
	96
	97	sub bytes_per_pixel {
	98	SDL::SurfaceBytesPerPixel(${$_[0]});
	99	}
	100
	101	sub Rshift {
	102	SDL::SurfaceRshift(${$_[0]});
	103	}
	104
	105	sub Gshift {
	106	SDL::SurfaceGshift(${$_[0]});
	107	}
	108
	109	sub Bshift {
	110	SDL::SurfaceBshift(${$_[0]});
	111	}
	112
	113	sub Ashift {
	114	SDL::SurfaceAshift(${$_[0]});
	115	}
	116
	117	sub Rmask {
	118	SDL::SurfaceRmask(${$_[0]});
	119	}
	120
	121	sub Gmask {
	122	SDL::SurfaceGmask(${$_[0]});
	123	}
	124
	125	sub Bmask {
	126	SDL::SurfaceBmask(${$_[0]});
	127	}
	128
	129	sub Amask {
	130	SDL::SurfaceAmask(${$_[0]});
	131	}
	132
	133	sub color_key {
	134	SDL::SurfaceColorKey(${$_[0]});
	135	}
	136
	137	sub alpha {
	138	SDL::SurfaceAlpha(${$_[0]});
	139	}
140
141	sub width {
142	SDL::SurfaceW(${$_[0]});
143	}
144
145	sub height {
146	SDL::SurfaceH(${$_[0]});
147	}
148
149	sub pitch {
150	SDL::SurfacePitch(${$_[0]});
151	}
152
153	sub pixels {
154	SDL::SurfacePixels(${$_[0]});
155	}
156
157	sub pixel {
084b921f	158	croak "SDL::Surface::pixel requires a SDL::Color"
8fde61e3	159	if $_[3] && $SDL::DEBUG && !$_[3]->isa("SDL::Color");
	160	$_[3] ?
	161	new SDL::Color -color => SDL::SurfacePixel(${$_[0]},$_[1],$_[2],${$_[3]}) :
	162	new SDL::Color -color => SDL::SurfacePixel(${$_[0]},$_[1],$_[2]);
	163	}
	164
	165	sub fill {
084b921f	166	croak "SDL::Surface::fill requires a SDL::Rect object"
8fde61e3	167	unless !$SDL::DEBUG \|\| $_[1] == 0 \|\| $_[1]->isa('SDL::Rect');
084b921f	168	croak "SDL::Surface::fill requires a SDL::Color object"
8fde61e3	169	unless !$SDL::DEBUG \|\| $_[2]->isa('SDL::Color');
	170	if ($_[1] == 0 ) {
	171	SDL::FillRect(${$_[0]},0,${$_[2]});
	172	} else {
	173	SDL::FillRect(${$_[0]},${$_[1]},${$_[2]});
	174	}
	175	}
	176
	177	sub lockp {
	178	SDL::MUSTLOCK(${$_[0]});
	179	}
	180
	181	sub lock {
	182	SDL::SurfaceLock(${$_[0]});
	183	}
	184
	185	sub unlock {
	186	SDL::SurfaceUnlock(${$_[0]});
	187	}
	188
	189	sub update {
	190	my $self = shift;;
	191	if ($SDL::DEBUG) {
	192	for (@_) {
084b921f	193	croak "SDL::Surface::update requires SDL::Rect objects"
8fde61e3	194	unless $_->isa('SDL::Rect');
	195	}
	196	}
	197	SDL::UpdateRects($$self, map { ${$_} } @_ );
	198	}
	199
	200	sub flip {
	201	SDL::Flip(${$_[0]});
	202	}
	203
	204	sub blit {
db3da111	205	$_[1] = 0 unless defined $_[1];
	206	$_[3] = 0 unless defined $_[3];
	207
8fde61e3	208	if ($SDL::DEBUG) {
084b921f	209	croak "SDL::Surface::blit requires SDL::Rect objects"
8fde61e3	210	unless ($_[1] == 0 \|\| $_[1]->isa('SDL::Rect'))
8fde61e3	211	&& ($_[3] == 0 \|\| $_[3]->isa('SDL::Rect'));
084b921f	212	croak "SDL::Surface::blit requires SDL::Surface objects"
8fde61e3	213	unless $_[2]->isa('SDL::Surface');
8fde61e3	214	}
db3da111	215	SDL::BlitSurface(map { (defined($_) && $_ != 0)? ${$_} : $_ } @_) if defined(@_);
8fde61e3	216	}
	217
	218	sub set_colors {
	219	my $self = shift;
	220	my $start = shift;
	221	for (@_) {
084b921f	222	croak "SDL::Surface::set_colors requires SDL::Color objects"
8fde61e3	223	unless !$SDL::DEBUG \|\| $_->isa('SDL::Color');
	224	}
	225	return SDL::SetColors($$self, $start, map { ${$_} } @_);
	226	}
	227
	228	sub set_color_key {
084b921f	229	croak "SDL::Surface::set_color_key requires a SDL::Color object"
8fde61e3	230	unless !$SDL::DEBUG \|\| (ref($_[2]) && $_[2]->isa('SDL::Color'));
	231	SDL::SetColorKey(${$_[0]},$_[1],${$_[2]});
	232	}
	233
	234	sub set_alpha {
	235	SDL::SetAlpha(${$_[0]},$_[1],$_[2]);
	236	}
	237
	238	sub display_format {
	239	my $self = shift;
	240	my $tmp = SDL::DisplayFormat($$self);
	241	SDL::FreeSurface ($$self);
	242	$$self = $tmp;
	243	$self;
	244	}
	245
	246	sub rgb {
	247	my $self = shift;
	248	my $tmp = SDL::ConvertRGB($$self);
	249	SDL::FreeSurface($$self);
	250	$$self = $tmp;
	251	$self;
	252	}
	253
	254	sub rgba {
	255	my $self = shift;
	256	my $tmp = SDL::ConvertRGBA($$self);
	257	SDL::FreeSurface($$self);
	258	$$self = $tmp;
	259	$self;
	260	}
	261
	262	sub rect {
	263	my $self = shift;
	264	new SDL::Rect -width => $self->width(), -height => $self->height(),
	265	-x => $_[0] \|\| 0, -y => $_[1] \|\| 0;
	266	}
	267
	268	sub print {
	269	my ($self,$x,$y,@text) = @_;
	270	SDL::SFont::PutString( $$self, $x, $y, join('',@text));
	271	}
	272
	273	sub save_bmp {
	274	SDL::SaveBMP( ${$_[0]},$_[1]);
	275	}
	276
	277	sub video_info {
	278	shift;
	279	SDL::VideoInfo();
	280	}
	281
	282	1;
	283
	284	__END__;
	285
	286	=pod
	287
	288	=head1 NAME
	289
	290	SDL::Surface - a SDL perl extension
	291
	292	=head1 SYNOPSIS
	293
294	use SDL::Surface;
295	$image = new SDL::Surface(-name=>"yomama.jpg");
296
297	=head1 DESCRIPTION
298
299	The C<SDL::Surface> module encapsulates the SDL_Surface* structure, and
300	many of its ancillatory functions. Not only is it a workhorse of the
301	OO Layer, it is the base class for the C<SDL::App> class.
302
303	=head1 EXPORTS
304
305	SDL_SWSURFACE SDL_HWSURFACE
306	SDL_ASYNCBLIT SDL_ANYFORMAT
307	SDL_HWPALETTE SDL_DOUBLEBUF
308	SDL_FULLSCREEN SDL_OPENGL
309	SDL_OPENGLBLIT SDL_RESIZEABLE
310	SDL_NOFRAME SDL_SRCCOLORKEY
311	SDL_RLEACCEL SDL_SRCALPHA
312	SDL_PREALLOC
313
314	=head1 METHODS
315
316	=head2 new (-name => 'foo.png')
317
318	The C<SDL::Surface> class can be instantiated in a number of different ways.
319	If support for the SDL_image library was included when SDL_perl was compiled,
320	the easiest way to create a new surface is to use the C<SDL::Surface::new>
321	method with the C<-name> option. This will load the image from the file
322	and return an object encapsulating the SDL_Surface*.
323
324	=head2 new (-from => $buffer, ... )
325
326	If the contents of the new Surface is already in memory, C<SDL::Surface::new>
327	may be called with the C<-from> option to create an image from that section
328	of memory. This method takes the following additional parameters:
329
330	=over 4
331
332	=item *
333
334	-width the width of the image in pixels
335
336	=item *
337
338	-height the height of the image in pixels
339
340	=item *
341
342	-depth the number of bits per pixel
343
344	=item *
345
346	-pitch the number of bytes per line
347
348	=item *
349
350	-Rmask an optional bitmask for red
351
352	=item *
353
354	-Gmask an optional bitmask for green
355
356	=item *
357
358	-Bmask an optional bitmask for green
359
360	=item *
361
362	-Amask an optional bitmask for alpha
363
364	=back
365
366	=head2 new ( -flags => SDL_SWSURFACE, ... )
367
368	Finally, C<SDL::Suface::new> may be invoked with the C<-flags> option, in a
369	similar fashion to the C<-from> directive. This invocation takes the same
370	additional options as C<-from> with the exception of C<-pitch> which is ignored.
371	This method returns a new, blank, SDL::Surface option with any of the following
372	flags turned on:
373
374	=over 4
375
376	=item *
377
378	SWSURFACE() a non-accelerated surface
379
380	=item *
381
382	HWSURFACE() a hardware accelerated surface
383
384	=item *
385
386	SRCCOLORKEY() a surface with a transperant color
387
388	=item *
389
390	SRCALPHA() an alpha blended, translucent surface
391
392	=back
393
394	=head2 flags ()
395
396	C<SDL::Surface::flags> returns the flags with which the surface was initialized.
397
398	=head2 palette ()
399
400	C<SDL::Surface::palette> currently returns a SDL_Palette*, this may change in
401	future revisions.
402
403	=head2 bpp ()
404
405	C<SDL::Surface::bpp> returns the bits per pixel of the surface
406
407	=head2 bytes_per_pixel ()
408
409	C<SDL::Surface::bytes_per_pixel> returns the bytes per pixel of the surface
410
411	=head2 Rshift ()
412
413	C<SDL::Surface::Rshift> returns the bit index of the red field for the surface's pixel format
414
415	=head2 Gshift ()
416
417	C<SDL::Surface::Gshift> returns the bit index of the green field for the surface's pixel format
418
419	=head2 Bshift ()
420
421	C<SDL::Surface::Bshift> returns the bit index of the blue field for the surface's pixel format
422
423	=head2 Ashift ()
424
425	C<SDL::Surface::Ashift> returns the bit index of the alpha field for the surface's pixel format
426
427	=head2 Rmask ()
428
429	C<SDL::Surface::Rmask> returns the bit mask for the red field for teh surface's pixel format
430
431	=head2 Gmask ()
432
433	C<SDL::Surface::Gmask> returns the bit mask for the green field for teh surface's pixel format
434
435	=head2 Bmask ()
436
437	C<SDL::Surface::Bmask> returns the bit mask for the blue field for teh surface's pixel format
438
439	=head2 Amask ()
440
441	C<SDL::Surface::Amask> returns the bit mask for the alpha field for teh surface's pixel format
442
443	=head2 color_key ()
444
445	C<SDL::Surface::color_key> returns the current color key for the image, which can be set with
446	the C<SDL::Surface::set_color_key> method. Before calling C<SDL::Surface::color_key> on
447	a image, you should fist call C<SDL::Surface::display_format> to convert it to the same
448	format as the display. Failure to do so will result in failure to apply the correct color_key.
449
450	=head2 alpha ()
451
452	C<SDL::Surface::alpha> returns the current alpha value for the image, which can be set with
453	the C<SDL::Surface::set_alpha> method.
454
455	=head2 width ()
456
457	C<SDL::Surface::width> returns the width in pixels of the surface
458
459	=head2 height ()
460
461	C<SDL::Surface::height> returns the height in pixels of the surface
462
463	=head2 pitch ()
464
465	C<SDL::Surface::pitch> returns the width of a surface's scanline in bytes
466
467	=head2 pixels ()
468
469	C<SDL::Surface::pixels> returns a Uint8* to the image's pixel data. This is not
470	inherently useful within perl, though may be used to pass image data to user provided
471	C functions.
472
473	=head2 pixel (x,y,[color])
474
475	C<SDL::Surface::pixel> will set the color value of the pixel at (x,y) to the given
476	color if provided. C<SDL::Surface::pixel> returns a SDL::Color object for the
477	color value of the pixel at (x,y) after any possible modifications.
478
479	=head2 fill (rect,color)
480
481	C<SDL::Surface::fill> will fill the given SDL::Rect rectangle with the specified SDL::Color
482	This function optionally takes a SDL_Rect* and a SDL_Color*
483
484	=head2 lockp ()
485
486	C<SDL::Surface::lockp> returns true if the surface must be locked
487
488	=head2 lock ()
489
490	C<SDL::Surface::lock> places a hardware lock if necessary, preventing access to
491	the surface's memory
492
493	=head2 unlock ()
494
495	C<SDL::Surface::unlock> removes any hardware locks, enabling blits
496
497	=head2 update ( rects...)
498
499	C<SDL::Surface::update> takes one or more SDL::Rect's which determine which sections
500	of the image are to be updated. This option is only useful on the appliaction surface.
501
502	=head2 flip ()
503
504	C<SDL::Surface::flip> updates the full surface, using a double buffer if available
505
506	=head2 blit (srect,dest,drect)
507
508	C<SDL::Surface::blit> blits the current surface onto the destination surface,
509	according to the provided rectangles. If a rectangle is 0, then the full surface is used.
510
511	=head2 set_colors (start,colors...)
512
513	C<SDL::Surface::set_colors> updates the palette starting at index C<start> with the
514	supplied colors. The colors may either be SDL::Color objects or SDL_Color* from the
515	low level C-style API.
516
517	=head2 set_color_key (flag,pixel) or (flag,x,y)
518
519	C<SDL::Surface::set_color_key> sets the blit flag, usually SDL_SRCCOLORKEY,
520	to the specified L<SDL::Color> object. Optional a SDL_Color* may be passed.
521
522	=head2 set_alpha (flag,alpha)
523
524	C<SDL::Surface::set_alpha> sets the opacity of the image for alpha blits.
525	C<alpha> takes a value from 0x00 to 0xff.
526
527	=head2 display_format ()
528
529	C<SDL::Surface::display_format> converts the surface to the same format as the
530	current screen.
531
532	=head2 rgb ()
533	C<SDL::Surface::rgb> converts the surface to a 24 bit rgb format regardless of the
534	initial format.
535
536	=head2 rgba ()
537	C<SDL::Surface::rgba> converts the surface to a 32 bit rgba format regarless of the
538	initial format.
539
540	=head2 print (x,y,text...)
541
542	C<SDL::Surface::print> renders the text using the current font onto the image.
543	This option is only supported for with SDL_image and SFont.
544
545	=head2 save_bmp (filename)
546
547	C<SDL::Surface::save_bmp> saves the surface to filename in Windows BMP format.
548
549	=head2 video_info ()
550
551	C<SDL::Surface::video_info> returns a hash describing the current state of the
552	video hardware.
553
554	=head1 AUTHOR
555
556	David J. Goehrig
557
558	=head1 SEE ALSO
559
560	L<perl> L<SDL::App> L<SDL::Color> L<SDL::Palette> L<SDL::Rect>
561
562	=cut