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1 | #!/usr/bin/env perl |
2 | # |
3 | # Rect.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 | package SDL::Rect; |
32 | |
33 | use strict; |
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34 | use warnings; |
35 | use Carp; |
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36 | use SDL; |
37 | |
38 | sub new { |
39 | my $proto = shift; |
40 | my $class = ref($proto) || $proto; |
41 | my %options = @_; |
42 | |
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43 | verify (%options, qw/ -x -y -top -left -width -height -w -h / ) if $SDL::DEBUG; |
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44 | |
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45 | my $x = $options{-x} || $options{-left} || 0; |
46 | my $y = $options{-y} || $options{-top} || 0; |
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47 | my $w = $options{-width} || $options{-w} || 0; |
48 | my $h = $options{-height} || $options{-h} || 0; |
49 | |
50 | my $self = \SDL::NewRect($x,$y,$w,$h); |
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51 | croak SDL::GetError() unless $$self; |
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52 | bless $self,$class; |
53 | return $self; |
54 | } |
55 | |
56 | sub DESTROY { |
57 | SDL::FreeRect(${$_[0]}); |
58 | } |
59 | |
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60 | # TODO: mangle with the symbol table to create an alias |
61 | # to sub x. We could call x from inside the sub but that |
62 | # would be another call and rects are a time-critical object. |
63 | sub left { |
64 | my $self = shift; |
65 | SDL::RectX($$self,@_); |
66 | } |
67 | |
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68 | sub x { |
69 | my $self = shift; |
70 | SDL::RectX($$self,@_); |
71 | } |
72 | |
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73 | ### TODO: see 'left' above |
74 | sub top { |
75 | my $self = shift; |
76 | SDL::RectY($$self,@_); |
77 | } |
78 | |
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79 | sub y { |
80 | my $self = shift; |
81 | SDL::RectY($$self,@_); |
82 | } |
83 | |
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84 | ### TODO: see 'left' above |
85 | sub w { |
86 | my $self = shift; |
87 | SDL::RectW($$self,@_); |
88 | } |
89 | |
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90 | sub width { |
91 | my $self = shift; |
92 | SDL::RectW($$self,@_); |
93 | } |
94 | |
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95 | ### TODO: see 'left' above |
96 | sub h { |
97 | my $self = shift; |
98 | SDL::RectH($$self,@_); |
99 | } |
100 | |
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101 | sub height { |
102 | my $self = shift; |
103 | SDL::RectH($$self,@_); |
104 | } |
105 | |
106 | 1; |
107 | |
108 | __END__; |
109 | |
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110 | =head1 NAME |
111 | |
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112 | SDL::Rect - raw object for storing rectangular coordinates |
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113 | |
114 | =head1 SYNOPSIS |
115 | |
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116 | my $rect = SDL::Rect->new( -height => 4, -width => 40 ); |
117 | |
118 | $rect->x(12); # same as $rect->left(12) |
119 | $rect->y(9); # same as $rect->top(9) |
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120 | |
121 | =head1 DESCRIPTION |
122 | |
123 | C<SDL::Rect::new> creates a SDL_Rect structure which is |
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124 | used for specifying regions of pixels for filling, blitting, and updating. |
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125 | These objects make it easy to cut and backfill. |
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126 | |
127 | By default, x, y, height and width are all set to 0. |
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128 | |
129 | =head2 METHODS |
130 | |
131 | The four fields of a rectangle can be set simply |
132 | by passing a value to the applicable method. These are: |
133 | |
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134 | =head3 x |
135 | |
136 | =head3 left |
137 | |
138 | sets and fetches the x (lefmost) position of the rectangle. |
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139 | |
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140 | =head3 y |
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141 | |
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142 | =head3 top |
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143 | |
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144 | sets and fetches the y (topmost) position. |
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145 | |
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146 | =head3 w |
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147 | |
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148 | =head3 width |
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149 | |
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150 | sets and fetched the width of the rectangle (in pixels). |
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151 | |
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152 | =head3 h |
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153 | |
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154 | =head3 height |
155 | |
156 | sets and fetched the height of the rectangle (in pixels). |
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157 | |
158 | =back |
159 | |
160 | =head1 AUTHOR |
161 | |
162 | David J. Goehrig |
163 | |
164 | =head1 SEE ALSO |
165 | |
166 | perl(1) SDL::Surface(3) |