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1 | #!/usr/bin/env perl |
2 | # |
3 | # Palette.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. |
13 | # |
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: |
26 | # |
27 | # David J. Goehrig |
28 | # dgoehrig@cpan.org |
29 | # |
30 | |
31 | # NB: there is no palette destructor because most of the time the |
32 | # palette will be owned by a surface, so any palettes you create |
33 | # with new, won't be destroyed until the program ends! |
34 | |
35 | package SDL::Palette; |
36 | use strict; |
37 | |
38 | # NB: there is no palette destructor because most of the time the |
39 | # palette will be owned by a surface, so any palettes you create |
40 | # with new, won't be destroyed until the program ends! |
41 | |
42 | sub new { |
43 | my $proto = shift; |
44 | my $class = ref($proto) || $proto; |
45 | my $image; |
46 | my $self; |
47 | if (@_) { |
48 | $image = shift; |
49 | $self = \$image->palette(); |
50 | } else { |
51 | $self = \SDL::NewPalette(256); |
52 | } |
53 | die SDL::GetError() unless $$self; |
54 | bless $self, $class; |
55 | return $self; |
56 | } |
57 | |
58 | sub size { |
59 | my $self = shift; |
60 | return SDL::PaletteNColors($$self); |
61 | } |
62 | |
63 | sub color { |
64 | my $self = shift; |
65 | my $index = shift; |
66 | my ($r,$g,$b); |
67 | if (@_) { |
68 | $r = shift; $g = shift; $b = shift; |
69 | return SDL::PaletteColors($$self,$index,$r,$g,$b); |
70 | } else { |
71 | return SDL::PaletteColors($$self,$index); |
72 | } |
73 | } |
74 | |
75 | sub red { |
76 | my $self = shift; |
77 | my $index = shift; |
78 | my $c; |
79 | if (@_) { |
80 | $c = shift; |
81 | return SDL::ColorR( |
82 | SDL::PaletteColors($$self,$index),$c); |
83 | } else { |
84 | return SDL::ColorR( |
85 | SDL::PaletteColors($$self,$index)); |
86 | } |
87 | } |
88 | |
89 | sub green { |
90 | my $self = shift; |
91 | my $index = shift; |
92 | my $c; |
93 | if (@_) { |
94 | $c = shift; |
95 | return SDL::ColorG( |
96 | SDL::PaletteColors($$self,$index),$c); |
97 | } else { |
98 | return SDL::ColorG( |
99 | SDL::PaletteColors($$self,$index)); |
100 | } |
101 | } |
102 | |
103 | sub blue { |
104 | my $self = shift; |
105 | my $index = shift; |
106 | my $c; |
107 | if (@_) { |
108 | $c = shift; |
109 | return SDL::ColorB( |
110 | SDL::PaletteColors($$self,$index),$c); |
111 | } else { |
112 | return SDL::ColorB( |
113 | SDL::PaletteColors($$self,$index)); |
114 | } |
115 | } |
116 | |
117 | 1; |
118 | |
119 | __END__; |
120 | |
121 | =pod |
122 | |
123 | =head1 NAME |
124 | |
125 | SDL::Palette - a perl extension |
126 | |
127 | =head1 DESCRIPTION |
128 | |
129 | L<SDL::Palette> provides an interface to the SDL_Palette structures, |
130 | and can be used to set the color values of an existing palette's indexes. |
131 | |
132 | =head1 METHODS |
133 | |
134 | =head2 blue ( index, [value] ) |
135 | |
136 | Fetches and sets the blue component of the color at index. |
137 | |
138 | =head2 green ( index, [value] ) |
139 | |
140 | Fetches and sets the green component of the color at index. |
141 | |
142 | =head2 red ( index, [value] ) |
143 | |
144 | Fetches and sets the red component of the color at index. |
145 | |
146 | =head2 color ( index, [ r, g, b ] ) |
147 | |
148 | Fetches and sets the RGB, returns an SDL_Color *. |
149 | |
150 | =head2 size |
151 | |
152 | Returns the size of the palette. |
153 | |
154 | =head1 AUTHOR |
155 | |
156 | David J. Goehrig |
157 | |
158 | =head1 SEE ALSO |
159 | |
160 | L<perl> L<SDL::Color> L<SDL::Surface> |
161 | |
162 | =cut |