[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 {
	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 { $_ != 0 ? ${$_} : $_ } @_);
}

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 {
	205	if ($SDL::DEBUG) {
084b921f	206	croak "SDL::Surface::blit requires SDL::Rect objects"
8fde61e3	207	unless ($_[1] == 0 \|\| $_[1]->isa('SDL::Rect'))
8fde61e3	208	&& ($_[3] == 0 \|\| $_[3]->isa('SDL::Rect'));
084b921f	209	croak "SDL::Surface::blit requires SDL::Surface objects"
8fde61e3	210	unless $_[2]->isa('SDL::Surface');
	211	}
	212	SDL::BlitSurface(map { $_ != 0 ? ${$_} : $_ } @_);
	213	}
	214
	215	sub set_colors {
	216	my $self = shift;
	217	my $start = shift;
	218	for (@_) {
084b921f	219	croak "SDL::Surface::set_colors requires SDL::Color objects"
8fde61e3	220	unless !$SDL::DEBUG \|\| $_->isa('SDL::Color');
	221	}
	222	return SDL::SetColors($$self, $start, map { ${$_} } @_);
	223	}
	224
	225	sub set_color_key {
084b921f	226	croak "SDL::Surface::set_color_key requires a SDL::Color object"
8fde61e3	227	unless !$SDL::DEBUG \|\| (ref($_[2]) && $_[2]->isa('SDL::Color'));
	228	SDL::SetColorKey(${$_[0]},$_[1],${$_[2]});
	229	}
	230
	231	sub set_alpha {
	232	SDL::SetAlpha(${$_[0]},$_[1],$_[2]);
	233	}
	234
	235	sub display_format {
	236	my $self = shift;
	237	my $tmp = SDL::DisplayFormat($$self);
	238	SDL::FreeSurface ($$self);
	239	$$self = $tmp;
	240	$self;
	241	}
	242
	243	sub rgb {
	244	my $self = shift;
	245	my $tmp = SDL::ConvertRGB($$self);
	246	SDL::FreeSurface($$self);
	247	$$self = $tmp;
	248	$self;
	249	}
	250
	251	sub rgba {
	252	my $self = shift;
	253	my $tmp = SDL::ConvertRGBA($$self);
	254	SDL::FreeSurface($$self);
	255	$$self = $tmp;
	256	$self;
	257	}
	258
	259	sub rect {
	260	my $self = shift;
	261	new SDL::Rect -width => $self->width(), -height => $self->height(),
	262	-x => $_[0] \|\| 0, -y => $_[1] \|\| 0;
	263	}
	264
	265	sub print {
	266	my ($self,$x,$y,@text) = @_;
	267	SDL::SFont::PutString( $$self, $x, $y, join('',@text));
	268	}
	269
	270	sub save_bmp {
	271	SDL::SaveBMP( ${$_[0]},$_[1]);
	272	}
	273
	274	sub video_info {
	275	shift;
	276	SDL::VideoInfo();
	277	}
	278
	279	1;
	280
	281	__END__;
	282
	283	=pod
	284
	285	=head1 NAME
	286
	287	SDL::Surface - a SDL perl extension
	288
	289	=head1 SYNOPSIS
	290
291	use SDL::Surface;
292	$image = new SDL::Surface(-name=>"yomama.jpg");
293
294	=head1 DESCRIPTION
295
296	The C<SDL::Surface> module encapsulates the SDL_Surface* structure, and
297	many of its ancillatory functions. Not only is it a workhorse of the
298	OO Layer, it is the base class for the C<SDL::App> class.
299
300	=head1 EXPORTS
301
302	SDL_SWSURFACE SDL_HWSURFACE
303	SDL_ASYNCBLIT SDL_ANYFORMAT
304	SDL_HWPALETTE SDL_DOUBLEBUF
305	SDL_FULLSCREEN SDL_OPENGL
306	SDL_OPENGLBLIT SDL_RESIZEABLE
307	SDL_NOFRAME SDL_SRCCOLORKEY
308	SDL_RLEACCEL SDL_SRCALPHA
309	SDL_PREALLOC
310
311	=head1 METHODS
312
313	=head2 new (-name => 'foo.png')
314
315	The C<SDL::Surface> class can be instantiated in a number of different ways.
316	If support for the SDL_image library was included when SDL_perl was compiled,
317	the easiest way to create a new surface is to use the C<SDL::Surface::new>
318	method with the C<-name> option. This will load the image from the file
319	and return an object encapsulating the SDL_Surface*.
320
321	=head2 new (-from => $buffer, ... )
322
323	If the contents of the new Surface is already in memory, C<SDL::Surface::new>
324	may be called with the C<-from> option to create an image from that section
325	of memory. This method takes the following additional parameters:
326
327	=over 4
328
329	=item *
330
331	-width the width of the image in pixels
332
333	=item *
334
335	-height the height of the image in pixels
336
337	=item *
338
339	-depth the number of bits per pixel
340
341	=item *
342
343	-pitch the number of bytes per line
344
345	=item *
346
347	-Rmask an optional bitmask for red
348
349	=item *
350
351	-Gmask an optional bitmask for green
352
353	=item *
354
355	-Bmask an optional bitmask for green
356
357	=item *
358
359	-Amask an optional bitmask for alpha
360
361	=back
362
363	=head2 new ( -flags => SDL_SWSURFACE, ... )
364
365	Finally, C<SDL::Suface::new> may be invoked with the C<-flags> option, in a
366	similar fashion to the C<-from> directive. This invocation takes the same
367	additional options as C<-from> with the exception of C<-pitch> which is ignored.
368	This method returns a new, blank, SDL::Surface option with any of the following
369	flags turned on:
370
371	=over 4
372
373	=item *
374
375	SWSURFACE() a non-accelerated surface
376
377	=item *
378
379	HWSURFACE() a hardware accelerated surface
380
381	=item *
382
383	SRCCOLORKEY() a surface with a transperant color
384
385	=item *
386
387	SRCALPHA() an alpha blended, translucent surface
388
389	=back
390
391	=head2 flags ()
392
393	C<SDL::Surface::flags> returns the flags with which the surface was initialized.
394
395	=head2 palette ()
396
397	C<SDL::Surface::palette> currently returns a SDL_Palette*, this may change in
398	future revisions.
399
400	=head2 bpp ()
401
402	C<SDL::Surface::bpp> returns the bits per pixel of the surface
403
404	=head2 bytes_per_pixel ()
405
406	C<SDL::Surface::bytes_per_pixel> returns the bytes per pixel of the surface
407
408	=head2 Rshift ()
409
410	C<SDL::Surface::Rshift> returns the bit index of the red field for the surface's pixel format
411
412	=head2 Gshift ()
413
414	C<SDL::Surface::Gshift> returns the bit index of the green field for the surface's pixel format
415
416	=head2 Bshift ()
417
418	C<SDL::Surface::Bshift> returns the bit index of the blue field for the surface's pixel format
419
420	=head2 Ashift ()
421
422	C<SDL::Surface::Ashift> returns the bit index of the alpha field for the surface's pixel format
423
424	=head2 Rmask ()
425
426	C<SDL::Surface::Rmask> returns the bit mask for the red field for teh surface's pixel format
427
428	=head2 Gmask ()
429
430	C<SDL::Surface::Gmask> returns the bit mask for the green field for teh surface's pixel format
431
432	=head2 Bmask ()
433
434	C<SDL::Surface::Bmask> returns the bit mask for the blue field for teh surface's pixel format
435
436	=head2 Amask ()
437
438	C<SDL::Surface::Amask> returns the bit mask for the alpha field for teh surface's pixel format
439
440	=head2 color_key ()
441
442	C<SDL::Surface::color_key> returns the current color key for the image, which can be set with
443	the C<SDL::Surface::set_color_key> method. Before calling C<SDL::Surface::color_key> on
444	a image, you should fist call C<SDL::Surface::display_format> to convert it to the same
445	format as the display. Failure to do so will result in failure to apply the correct color_key.
446
447	=head2 alpha ()
448
449	C<SDL::Surface::alpha> returns the current alpha value for the image, which can be set with
450	the C<SDL::Surface::set_alpha> method.
451
452	=head2 width ()
453
454	C<SDL::Surface::width> returns the width in pixels of the surface
455
456	=head2 height ()
457
458	C<SDL::Surface::height> returns the height in pixels of the surface
459
460	=head2 pitch ()
461
462	C<SDL::Surface::pitch> returns the width of a surface's scanline in bytes
463
464	=head2 pixels ()
465
466	C<SDL::Surface::pixels> returns a Uint8* to the image's pixel data. This is not
467	inherently useful within perl, though may be used to pass image data to user provided
468	C functions.
469
470	=head2 pixel (x,y,[color])
471
472	C<SDL::Surface::pixel> will set the color value of the pixel at (x,y) to the given
473	color if provided. C<SDL::Surface::pixel> returns a SDL::Color object for the
474	color value of the pixel at (x,y) after any possible modifications.
475
476	=head2 fill (rect,color)
477
478	C<SDL::Surface::fill> will fill the given SDL::Rect rectangle with the specified SDL::Color
479	This function optionally takes a SDL_Rect* and a SDL_Color*
480
481	=head2 lockp ()
482
483	C<SDL::Surface::lockp> returns true if the surface must be locked
484
485	=head2 lock ()
486
487	C<SDL::Surface::lock> places a hardware lock if necessary, preventing access to
488	the surface's memory
489
490	=head2 unlock ()
491
492	C<SDL::Surface::unlock> removes any hardware locks, enabling blits
493
494	=head2 update ( rects...)
495
496	C<SDL::Surface::update> takes one or more SDL::Rect's which determine which sections
497	of the image are to be updated. This option is only useful on the appliaction surface.
498
499	=head2 flip ()
500
501	C<SDL::Surface::flip> updates the full surface, using a double buffer if available
502
503	=head2 blit (srect,dest,drect)
504
505	C<SDL::Surface::blit> blits the current surface onto the destination surface,
506	according to the provided rectangles. If a rectangle is 0, then the full surface is used.
507
508	=head2 set_colors (start,colors...)
509
510	C<SDL::Surface::set_colors> updates the palette starting at index C<start> with the
511	supplied colors. The colors may either be SDL::Color objects or SDL_Color* from the
512	low level C-style API.
513
514	=head2 set_color_key (flag,pixel) or (flag,x,y)
515
516	C<SDL::Surface::set_color_key> sets the blit flag, usually SDL_SRCCOLORKEY,
517	to the specified L<SDL::Color> object. Optional a SDL_Color* may be passed.
518
519	=head2 set_alpha (flag,alpha)
520
521	C<SDL::Surface::set_alpha> sets the opacity of the image for alpha blits.
522	C<alpha> takes a value from 0x00 to 0xff.
523
524	=head2 display_format ()
525
526	C<SDL::Surface::display_format> converts the surface to the same format as the
527	current screen.
528
529	=head2 rgb ()
530	C<SDL::Surface::rgb> converts the surface to a 24 bit rgb format regardless of the
531	initial format.
532
533	=head2 rgba ()
534	C<SDL::Surface::rgba> converts the surface to a 32 bit rgba format regarless of the
535	initial format.
536
537	=head2 print (x,y,text...)
538
539	C<SDL::Surface::print> renders the text using the current font onto the image.
540	This option is only supported for with SDL_image and SFont.
541
542	=head2 save_bmp (filename)
543
544	C<SDL::Surface::save_bmp> saves the surface to filename in Windows BMP format.
545
546	=head2 video_info ()
547
548	C<SDL::Surface::video_info> returns a hash describing the current state of the
549	video hardware.
550
551	=head1 AUTHOR
552
553	David J. Goehrig
554
555	=head1 SEE ALSO
556
557	L<perl> L<SDL::App> L<SDL::Color> L<SDL::Palette> L<SDL::Rect>
558
559	=cut