Image-Base-1.17/ 0002755 0001750 0001750 00000000000 12006102213 011075 5 ustar gg gg Image-Base-1.17/t/ 0002755 0001750 0001750 00000000000 12006102212 011337 5 ustar gg gg Image-Base-1.17/t/samples.t 0000644 0001750 0001750 00000051024 11776231126 013214 0 ustar gg gg #!/usr/bin/perl -w
# Copyright 2010, 2011, 2012 Kevin Ryde
# This file is part of Image-Base.
#
# Image-Base 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 3, or (at your option) any
# later version.
#
# Image-Base 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 General
# Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Image-Base. If not, see .
use strict;
use Test;
BEGIN {
plan tests => 56;
}
# whether to mark repeat-drawn pixels as "X" (repeat drawn pixels being
# wasteful and undesirable if they can be avoided reasonably easily).
my $MyGrid_flag_overlap = 1;
{
package MyGrid;
use Image::Base;
use vars '@ISA';
@ISA = ('Image::Base');
sub new {
my $class = shift;
my $self = bless { @_}, $class;
my $horiz = '+' . ('-' x $self->{'-width'}) . "+\n";
$self->{'str'} = $horiz
. (('|' . (' ' x $self->{'-width'}) . "|\n") x $self->{'-height'})
. $horiz;
return $self;
}
sub xy {
my ($self, $x, $y, $colour) = @_;
my $pos = $x+1 + ($y+1)*($self->{'-width'}+3);
if ($MyGrid_flag_overlap) {
if (substr ($self->{'str'}, $pos, 1) ne ' ') {
# doubled up pixel, undesirable, treated as an error
$colour = 'X';
}
}
substr ($self->{'str'}, $pos, 1) = $colour;
}
}
#------------------------------------------------------------------------------
# line()
foreach my $elem (
# one pixel
[0,0, 0,0, <<'HERE'],
+--------------------+
|* |
| |
| |
| |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
# horizontal
[3,3, 13,3, <<'HERE'],
+--------------------+
| |
| |
| |
| *********** |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
# vertical
[3,3, 3,9, <<'HERE'],
+--------------------+
| |
| |
| |
| * |
| * |
| * |
| * |
| * |
| * |
| * |
+--------------------+
HERE
# two pixels
[1,3, 2,4, <<'HERE'],
+--------------------+
| |
| |
| |
| * |
| * |
| |
| |
| |
| |
| |
+--------------------+
HERE
# shallow rounding step in middle
[1,3, 4,4, <<'HERE'],
+--------------------+
| |
| |
| |
| ** |
| ** |
| |
| |
| |
| |
| |
+--------------------+
HERE
# steep rounding step in middle
[1,3, 2,6, <<'HERE'],
+--------------------+
| |
| |
| |
| * |
| * |
| * |
| * |
| |
| |
| |
+--------------------+
HERE
[0,0, 19,9, <<'HERE'],
+--------------------+
|** |
| ** |
| ** |
| ** |
| ** |
| ** |
| ** |
| ** |
| ** |
| **|
+--------------------+
HERE
) {
my ($x0,$y0, $x1,$y1, $want) = @$elem;
foreach ('', 'swap') {
my $image = MyGrid->new (-width => 20, -height => 10);
$image->line ($x0,$y0, $x1,$y1, '*');
my $got = $image->{'str'};
ok ("\n$got", "\n$want", "line $x0,$y0, $x1,$y1");
($x0,$y0, $x1,$y1) = ($x1,$y1, $x0,$y0);
}
}
#------------------------------------------------------------------------------
# rectangle()
foreach my $elem (
# one pixel
[0,0, 0,0, 0, <<'HERE'],
+--------------------+
|* |
| |
| |
| |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
# horizontal
[3,3, 13,3, 0, <<'HERE'],
+--------------------+
| |
| |
| |
| *********** |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
# vertical
[3,3, 3,9, 0, <<'HERE'],
+--------------------+
| |
| |
| |
| * |
| * |
| * |
| * |
| * |
| * |
| * |
+--------------------+
HERE
# two pixels
[1,3, 2,4, 0, <<'HERE'],
+--------------------+
| |
| |
| |
| ** |
| ** |
| |
| |
| |
| |
| |
+--------------------+
HERE
[1,3, 4,4, 0, <<'HERE'],
+--------------------+
| |
| |
| |
| **** |
| **** |
| |
| |
| |
| |
| |
+--------------------+
HERE
[1,3, 2,6, 0, <<'HERE'],
+--------------------+
| |
| |
| |
| ** |
| ** |
| ** |
| ** |
| |
| |
| |
+--------------------+
HERE
# three pixels, unfilled
[1,3, 3,5, 0, <<'HERE'],
+--------------------+
| |
| |
| |
| *** |
| * * |
| *** |
| |
| |
| |
| |
+--------------------+
HERE
# three pixels, filled
[1,3, 3,5, 1, <<'HERE'],
+--------------------+
| |
| |
| |
| *** |
| *** |
| *** |
| |
| |
| |
| |
+--------------------+
HERE
[1,3, 4,5, 0, <<'HERE'],
+--------------------+
| |
| |
| |
| **** |
| * * |
| **** |
| |
| |
| |
| |
+--------------------+
HERE
[1,3, 4,5, 1, <<'HERE'],
+--------------------+
| |
| |
| |
| **** |
| **** |
| **** |
| |
| |
| |
| |
+--------------------+
HERE
[2,3, 4,6, 0, <<'HERE'],
+--------------------+
| |
| |
| |
| *** |
| * * |
| * * |
| *** |
| |
| |
| |
+--------------------+
HERE
[2,3, 4,6, 1, <<'HERE'],
+--------------------+
| |
| |
| |
| *** |
| *** |
| *** |
| *** |
| |
| |
| |
+--------------------+
HERE
[0,0, 19,9, 0, <<'HERE'],
+--------------------+
|********************|
|* *|
|* *|
|* *|
|* *|
|* *|
|* *|
|* *|
|* *|
|********************|
+--------------------+
HERE
[0,0, 19,9, 1, <<'HERE'],
+--------------------+
|********************|
|********************|
|********************|
|********************|
|********************|
|********************|
|********************|
|********************|
|********************|
|********************|
+--------------------+
HERE
) {
my ($x0,$y0, $x1,$y1, $fill, $want) = @$elem;
my $image = MyGrid->new (-width => 20, -height => 10);
$image->rectangle ($x0,$y0, $x1,$y1, '*', $fill);
my $got = $image->{'str'};
ok ("\n$got", "\n$want",
"rectangle $x0,$y0, $x1,$y1, fill=$fill");
}
#------------------------------------------------------------------------------
# ellipse()
foreach my $elem (
# one pixel
[2,1, 2,1, 0, <<'HERE'],
+--------------------+
| |
| * |
| |
| |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
# "X" overlap of top centre pixel when unfilled
[1,0, 3,2, 0, <<'HERE'],
+--------------------+
| X |
| * * |
| X |
| |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
[1,0, 3,2, 1, <<'HERE'],
+--------------------+
| * |
| *** |
| * |
| |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
[0,0, 3,3, 0, <<'HERE'],
+--------------------+
| ** |
|* * |
|* * |
| ** |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
[0,0, 3,3, 1, <<'HERE'],
+--------------------+
| ** |
|**** |
|**** |
| ** |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
# "X" overlap of top centre pixel when unfilled
[1,0, 5,4, 0, <<'HERE'],
+--------------------+
| *X* |
| * * |
| * * |
| * * |
| *X* |
| |
| |
| |
| |
| |
+--------------------+
HERE
[1,0, 5,4, 1, <<'HERE'],
+--------------------+
| *** |
| ***** |
| ***** |
| ***** |
| *** |
| |
| |
| |
| |
| |
+--------------------+
HERE
# for a 3-high b=1 ellipse like the following the top row
# is y=1 and the step down to y=0 occurs when the midpoint
# y=0.5 is inside the ellipse, which from
# x^2/a^2 + y^2/b^2 = 1
# is when
# x^2/a^2 + 1/4 / 1 = 1
# x = a * sqrt(3)/2
# so 5 wide a=2.5 is x=2.16 only the last pixel
# or 19 wide a=9.5 is x=8.22 the second last
#
[0,0, 5,2, 0, <<'HERE'],
+--------------------+
| **** |
|* * |
| **** |
| |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
[0,0, 5,2, 1, <<'HERE'],
+--------------------+
| **** |
|****** |
| **** |
| |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
[0,0, 19,2, 0, <<'HERE'],
+--------------------+
| **************** |
|** **|
| **************** |
| |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
[0,0, 19,2, 1, <<'HERE'],
+--------------------+
| **************** |
|********************|
| **************** |
| |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
) {
# no swapping for ellipse() corners
my ($x0,$y0, $x1,$y1, $fill, $want) = @$elem;
my $image = MyGrid->new (-width => 20, -height => 10);
$image->ellipse ($x0,$y0, $x1,$y1, '*', $fill);
my $got = $image->{'str'};
ok ("\n$got", "\n$want", "ellipse $x0,$y0, $x1,$y1, fill=$fill");
}
#------------------------------------------------------------------------------
# diamond()
foreach my $elem (
# one pixel
[0,0, 0,0, 1, <<'HERE'],
+--------------------+
|* |
| |
| |
| |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
# horizontal
[3,3, 13,3, 1, <<'HERE'],
+--------------------+
| |
| |
| |
| *********** |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
# vertical
[3,3, 3,9, 1, <<'HERE'],
+--------------------+
| |
| |
| |
| * |
| * |
| * |
| * |
| * |
| * |
| * |
+--------------------+
HERE
# two pixels
[1,3, 2,4, 1, <<'HERE'],
+--------------------+
| |
| |
| |
| ** |
| ** |
| |
| |
| |
| |
| |
+--------------------+
HERE
# 4x2
[1,3, 4,4, 1, <<'HERE'],
+--------------------+
| |
| |
| |
| **** |
| **** |
| |
| |
| |
| |
| |
+--------------------+
HERE
# 2x4
[1,3, 2,6, 1, <<'HERE'],
+--------------------+
| |
| |
| |
| ** |
| ** |
| ** |
| ** |
| |
| |
| |
+--------------------+
HERE
# bit of overlap yet
[0,0, 2,2, 0, <<'HERE'],
+--------------------+
| X |
|* * |
| X |
| |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
[0,0, 2,2, 1, <<'HERE'],
+--------------------+
| * |
|*** |
| * |
| |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
[0,0, 3,3, 0, <<'HERE'],
+--------------------+
| ** |
|* * |
|* * |
| ** |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
[0,0, 3,3, 1, <<'HERE'],
+--------------------+
| ** |
|**** |
|**** |
| ** |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
# bit of overlap yet
[0,0, 4,4, 0, <<'HERE'],
+--------------------+
| X |
| * * |
|* * |
| * * |
| X |
| |
| |
| |
| |
| |
+--------------------+
HERE
[0,0, 4,4, 1, <<'HERE'],
+--------------------+
| * |
| *** |
|***** |
| *** |
| * |
| |
| |
| |
| |
| |
+--------------------+
HERE
[0,0, 4,2, 1, <<'HERE'],
+--------------------+
| * |
|***** |
| * |
| |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
[0,0, 2,4, 1, <<'HERE'],
+--------------------+
| * |
| * |
|*** |
| * |
| * |
| |
| |
| |
| |
| |
+--------------------+
HERE
# rounding to be pointier
[0,0, 5,2, 1, <<'HERE'],
+--------------------+
| ** |
|****** |
| ** |
| |
| |
| |
| |
| |
| |
| |
+--------------------+
HERE
[0,0, 2,5, 1, <<'HERE'],
+--------------------+
| * |
| * |
|*** |
|*** |
| * |
| * |
| |
| |
| |
| |
+--------------------+
HERE
# BUGGY yet
# [1,1, 9,5, 0, <<'HERE'],
# +--------------------+
# | |
# | * |
# | ** ** |
# | ** ** |
# | ** ** |
# | * |
# | |
# | |
# | |
# | |
# +--------------------+
# HERE
[1,1, 9,5, 1, <<'HERE'],
+--------------------+
| |
| * |
| ***** |
| ********* |
| ***** |
| * |
| |
| |
| |
| |
+--------------------+
HERE
) {
my ($x0,$y0, $x1,$y1, $fill, $want) = @$elem;
my $image = MyGrid->new (-width => 20, -height => 10);
$image->diamond ($x0,$y0, $x1,$y1, '*', $fill);
my $got = $image->{'str'};
ok ("\n$got", "\n$want", "line $x0,$y0, $x1,$y1");
($x0,$y0, $x1,$y1) = ($x1,$y1, $x0,$y0);
}
exit 0;
Image-Base-1.17/t/misc.t 0000644 0001750 0001750 00000003314 11614144244 012475 0 ustar gg gg #!/usr/bin/perl -w
# Copyright 2011 Kevin Ryde
# This file is part of Image-Base.
#
# Image-Base 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 3, or (at your option) any
# later version.
#
# Image-Base 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 General
# Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Image-Base. If not, see .
use strict;
use Test;
BEGIN {
plan tests => 5;
}
{
package MyTestImage;
use Image::Base;
use vars '@ISA';
@ISA = ('Image::Base');
sub new {
my $class = shift;
return bless { @_}, $class;
}
}
#------------------------------------------------------------------------------
# VERSION
my $want_version = 1.17;
ok ($Image::Base::VERSION,
$want_version,
'VERSION variable');
ok (Image::Base->VERSION,
$want_version,
'VERSION class method');
ok (eval { Image::Base->VERSION($want_version); 1 },
1,
"VERSION class check $want_version");
my $check_version = $want_version + 1000;
ok (! eval { Image::Base->VERSION($check_version); 1 },
1,
"VERSION class check $check_version");
#------------------------------------------------------------------------------
# add_colours()
{
# just that the method exists
my $image = MyTestImage->new;
$image->add_colours ('red','#112233');
ok (defined $image->can('add_colours'),
1,
'add_colours() exists');
}
exit 0;
Image-Base-1.17/t/base.t 0000755 0001750 0001750 00000002540 11603266002 012452 0 ustar gg gg #!/usr/bin/perl -w
# $Id$
# Copyright (c) 2000 Mark Summerfield. All Rights Reserved.
# May be used/distributed under the GPL.
# We test this class in its decendants, especially Image::Xpm.
use strict ;
use vars qw( $Loaded $Count $DEBUG $TRIMWIDTH ) ;
BEGIN { $| = 1 ; print "1..1\n" }
END { print "not ok 1\n" unless $Loaded ; }
use Image::Base ;
$Loaded = 1 ;
$DEBUG = 1, shift if @ARGV and $ARGV[0] eq '-d' ;
$TRIMWIDTH = @ARGV ? shift : 60 ;
report( "loaded module ", 0, '', __LINE__ ) ;
sub report {
my $test = shift ;
my $flag = shift ;
my $e = shift ;
my $line = shift ;
++$Count ;
printf "[%03d~%04d] $test(): ", $Count, $line if $DEBUG ;
if( $flag == 0 and not $e ) {
print "ok $Count\n" ;
}
elsif( $flag == 0 and $e ) {
$e =~ tr/\n/ / ;
if( length $e > $TRIMWIDTH ) { $e = substr( $e, 0, $TRIMWIDTH ) . '...' }
print "not ok $Count" ;
print " \a($e)" if $DEBUG ;
print "\n" ;
}
elsif( $flag ==1 and not $e ) {
print "not ok $Count" ;
print " \a(error undetected)" if $DEBUG ;
print "\n" ;
}
elsif( $flag ==1 and $e ) {
$e =~ tr/\n/ / ;
if( length $e > $TRIMWIDTH ) { $e = substr( $e, 0, $TRIMWIDTH ) . '...' }
print "ok $Count" ;
print " ($e)" if $DEBUG ;
print "\n" ;
}
}
Image-Base-1.17/devel/ 0002755 0001750 0001750 00000000000 12006102212 012173 5 ustar gg gg Image-Base-1.17/devel/overflow.pl 0000644 0001750 0001750 00000003463 11603266001 014410 0 ustar gg gg #!/usr/bin/perl -w
# Copyright 2010 Kevin Ryde
# This file is part of Image-Base.
#
# Image-Base 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 3, or (at your option) any
# later version.
#
# Image-Base 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 General
# Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Image-Base. If not, see .
use strict;
use warnings;
use List::Util qw(min max);
# uncomment this to run the ### lines
use Smart::Comments;
my $a = 1000;
my $b = 1000;
my $aa = $a ** 2;
my $bb = $b ** 2;
my $x = $a - int($a) ; # 0 or 0.5
my $y = $b ;
### initial: "start xy $x,$y"
my $d = ($x ? 2.25*$bb : $bb) - ( $aa * $b ) + ( $aa / 4 ) ;
my $max_d = 0;
while( $y >= 1
&& ( $aa * ( $y - 0.5 ) ) > ( $bb * ( $x + 1 ) ) ) {
### assert: $d == ($x+1)**2 * $bb + ($y-.5)**2 * $aa - $aa * $bb
if( $d < 0 ) {
$d += ( $bb * ( ( 2 * $x ) + 3 ) ) ;
++$x ;
}
else {
$d += ( ( $bb * ( ( 2 * $x ) + 3 ) ) +
( $aa * ( ( -2 * $y ) + 2 ) ) ) ;
++$x ;
--$y ;
}
$max_d = max($d, $max_d);
}
# switch to d2 = E(x+1/2,y-1) by adding E(x+1/2,y-1) - E(x+1,y-1/2)
$d += $aa*(.75-$y) - $bb*($x+.75);
while( $y >= 1 ) {
if( $d < 0 ) {
$d += ( $bb * ( ( 2 * $x ) + 2 ) ) +
( $aa * ( ( -2 * $y ) + 3 ) ) ;
++$x ;
--$y ;
}
else {
$d += ( $aa * ( ( -2 * $y ) + 3 ) ) ;
--$y ;
}
### assert: $d == $bb*($x+0.5)**2 + $aa*($y-1)**2 - $aa*$bb
$max_d = max($d, $max_d);
}
### $max_d
Image-Base-1.17/devel/symmetry.pl 0000644 0001750 0001750 00000003120 11603266001 014424 0 ustar gg gg #!/usr/bin/perl -w
# Copyright 2010 Kevin Ryde
# This file is part of Image-Base.
#
# Image-Base 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 3, or (at your option) any
# later version.
#
# Image-Base 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 General
# Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Image-Base. If not, see .
use strict;
use warnings;
use Image::Xpm;
use POSIX 'floor', 'ceil';
my $w = 10;
my $h = 10;
my $image = Image::Xpm->new (-width => $w, -height => $h);
$image->rectangle (0,0, $w-1,$h-1, 'black', 1);
$image->ellipse (0,0, $w-1,$h-1, 'white');
foreach my $x (0 .. ceil($w/2)) {
my $x2 = $w-1 - $x;
foreach my $y (0 .. ceil($h/2)) {
my $y2 = $h-1 - $y;
my $c = $image->xy($x,$y);
my $c12 = $image->xy($x,$y2);
my $c21 = $image->xy($x2,$y);
my $c22 = $image->xy($x2,$y2);
if ($c ne $c12
|| $c ne $c12
|| $c ne $c21
|| $c ne $c22) {
print "not symmetric\n";
print " $x,$y $c\n";
print " $x,$y2 $c12\n";
print " $x2,$y $c21\n";
print " $x2,$y2 $c22\n";
}
}
}
# $image->save('/dev/stdout');
# # print $image->{'str'};
# $image->save('/tmp/ellipse.xpm');
# system ('xzgv /tmp/ellipse.xpm');
exit 0;
Image-Base-1.17/devel/misc.pl 0000644 0001750 0001750 00000003003 11603266001 013466 0 ustar gg gg #!/usr/bin/perl -w
# Copyright 2010 Kevin Ryde
# This file is part of Image-Base.
#
# Image-Base 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 3, or (at your option) any
# later version.
#
# Image-Base 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 General
# Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Image-Base. If not, see .
use strict;
use warnings;
use List::Util qw(min max);
use Smart::Comments;
{
package MyGrid;
use Image::Base;
use vars '@ISA';
@ISA = ('Image::Base');
sub new {
my $class = shift;
my $self = bless { @_}, $class;
my $horiz = '+' . ('-' x $self->{'-width'}) . "+\n";
$self->{'str'} = $horiz
. (('|' . (' ' x $self->{'-width'}) . "|\n") x $self->{'-height'})
. $horiz;
return $self;
}
sub xy {
my ($self, $x, $y, $colour) = @_;
if (defined $colour && $colour eq 'black') {
$colour = ' ';
} else {
$colour = '*';
}
substr ($self->{'str'}, $x+1 + ($y+1)*($self->{'-width'}+3), 1) = $colour;
}
}
{
my $p = MyGrid->new (-width => 10, -height => 5);
my $q = $p->new_from_image('MyGrid') ;
print $p->{'str'};
print $q->{'str'};
exit 0;
}
Image-Base-1.17/devel/ellipse.pl 0000644 0001750 0001750 00000004352 11603266001 014200 0 ustar gg gg #!/usr/bin/perl -w
# Copyright 2010 Kevin Ryde
# This file is part of Image-Base.
#
# Image-Base 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 3, or (at your option) any
# later version.
#
# Image-Base 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 General
# Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Image-Base. If not, see .
use strict;
use warnings;
use Image::Xpm;
# uncomment this to run the ### lines
#use Smart::Comments;
{
package MyGrid;
use Image::Base;
use vars '@ISA';
@ISA = ('Image::Base');
sub new {
my $class = shift;
my $self = bless { @_}, $class;
my $horiz = '+' . ('-' x $self->{'-width'}) . "+\n";
$self->{'str'} = $horiz
. (('|' . (' ' x $self->{'-width'}) . "|\n") x $self->{'-height'})
. $horiz;
return $self;
}
sub xy {
my ($self, $x, $y, $colour) = @_;
if ($x != int($x) || $y != int($y)) {
}
print "$x $y\n";
if ($colour eq 'black') {
$colour = ' ';
} else {
$colour = '*';
}
substr ($self->{'str'}, $x+1 + ($y+1)*($self->{'-width'}+3), 1) = $colour;
print $self->{'str'};
}
}
my $w = 77;
my $h = 3;
{
my $image = MyGrid->new (-width => $w, -height => $h);
print "ellipse draw\n";
$image->ellipse (0,0, $w-1,$h-1, 'white');
print $image->{'str'};
exit 0;
}
{
my $image = Image::Xpm->new (-width => $w, -height => $h);
$image->rectangle (0,0, $w-1,$h-1, 'black', 1);
$image->line (0,int($h/2), $w-1,int($h/2), 'orange');
$image->line (int($w/2),0, int($w/2),$h-1, 'orange');
$image->line (int($w*.25),0, int($w*.25),$h-1, 'orange');
$image->line (int($w*.75),0, int($w*.75),$h-1, 'orange');
$image->line (0,int($h*.25), $w-1,int($h*.25), 'orange');
$image->line (0,int($h*.75), $w-1,int($h*.75), 'orange');
$image->ellipse (0,0, $w-1,$h-1, 'white');
$image->save('/tmp/ellipse.xpm');
system ('xzgv /tmp/ellipse.xpm');
exit 0;
}
Image-Base-1.17/Changes 0000644 0001750 0001750 00000002132 12006102207 012367 0 ustar gg gg
2012/07/01 version 1.17
Document -file_format, -quality_percent common attributes.
2011/07/10 version 1.16
New diamond() method.
2011/02/15 version 1.15
Tests use plain Test.pm
2011/01/26 version 1.14
Oops, actual add_colours() code, not just docs.
2011/01/23 version 1.13
Add add_colours() base method.
Document some common attributes like -file.
2010/11/17 version 1.12
Add ellipse() $fill parameter.
2010/10/22 version 1.11
Tweak ellipse() discriminator changeover, use rectangle() for smalls.
2010/10/08 version 1.10
Enhance rectangle() unfilled to not overlap drawn pixels.
2010/10/04 version 1.09
Fix ellipse() on even width or height.
- avoid calling xy() with 0.5 fractional position
- helps drawing of right/bottom edges depending how subclasses rounded
Fix ellipse() horizontal ends when small height and big width.
Docs cross reference modules extending Image::Base.
2010/09/18 version 1.08
Fix line() for shallow slope rounding.
Fix line() for steep slope pixel spacing.
2000/05/05
Added some basic drawing methods. Minor documentation changes.
2000/05/04
Created.
Image-Base-1.17/MANIFEST 0000644 0001750 0001750 00000000440 12006102213 012222 0 ustar gg gg Changes
devel/ellipse.pl
devel/misc.pl
devel/overflow.pl
devel/symmetry.pl
GPL-3
LGPL-3
lib/Image/Base.pm
Makefile.PL
MANIFEST This list of files
MANIFEST.SKIP
README
SIGNATURE
t/base.t
t/misc.t
t/samples.t
META.yml Module meta-data (added by MakeMaker)
Image-Base-1.17/MANIFEST.SKIP 0000644 0001750 0001750 00000005576 11776225706 013040 0 ustar gg gg #!/usr/bin/perl
# MANIFEST.SKIP -- Kevin's various excluded files
# Copyright 2008, 2009, 2010, 2011, 2012 Kevin Ryde
# This file is shared among several distributions.
#
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# This file is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this file. If not, see .
# cf. /usr/share/perl/5.14/ExtUtils/MANIFEST.SKIP
# emacs backups
~$
# emacs locks
(^|/)\.#
# emacs autosave
(^|/)#
# own distdir
^[A-Za-z][A-Za-z0-9-_]*-\d+/
# own dist files
\.tar$
\.tar\.gz$
\.deb$
# ExtUtils::MakeMaker leaving Makefile.old
# and "myman" leaving MANIFEST.old
\.old$
# ExtUtils::MakeMaker "metafile" rule temporary, left behind if interrupted
^META_new\.yml$
# built - MakeMaker
^Makefile$
^blib
^pm_to_blib
^TAGS$
# MakeMaker 6.18 to 6.25, apparently
^blibdirs\.ts$
# msdos compiler output stuff using gcc,
# "XSFILENAME.def" extension, and others fixed names it seems
\.def$
^dll\.base$
^dll\.exp$
# msdos compiler stuff using ms c
\.pdb$
# built - recent Module::Build nonsense
^MYMETA\.yml$
# built - cdbs and debhelper
^debian/stamp-
^debian/.*\.log$
# built - texinfo.tex temporaries
\.(aux|cp|cps|fn|fns|ky|log|pg|toc|tp|tps|vr)$
# toplevel .c files built from .xs
^[^/]+\.c$
# built .o compiled and .bs from .xs
\.o$
\.obj$
\.bs$
#
#(^|/)[A-Z][A-Za-z0-9_]*\.c$
#/[^Z])[^/]+\.c$
# built - configury
^a\.out$
^conftest
^config\.h$
^myconfig\.h$
# built - toplevel html pages
^[a-zA-Z][^./]+\.html$
# inc/MyMakefileExtras.pm "diff-prev"
^diff\.tmp
# inc/MyMakefileExtras.pm "lintian-source"
^temp-lintian
# various testing
^tempfile\.png$
^tempfile
\.tmp$
# my dists
^dist-deb
^up$
^c$
# special case p..ulp test build stuff
devel/h2xs/TestConstFoo/
# special case various executables
^devel/exe-[^/.]+$
# special case mall executables
^devel/hblk$
^devel/mallopt$
^devel/mallstats$
^devel/malltrim$
# special case fli executables
^devel/mmap-multi$
# special case widget-bits executables
^devel/grandom$
^devel/grandom-[a-z]+$
# special case widget-cursor executables
^devel/invisible-blank$
# special case x'or executables
^devel/gtk-gc-colour$
# special case combo executables
^devel/toolbutton-overflow-leak$
# special case xpother executables
^devel/encode-all$
^devel/encode-dump$
^devel/Encode-X11-xlib$
^devel/Encode-X11-xlib2$
# special case xpother samples
^devel/encode.*\.ctext$
^devel/encode.*\.utf8$
# special htmlext environs
^test-dist/
\.junk$
\.bak$
^backup
^misc
^maybe
^samples
^samp
^formats
Image-Base-1.17/GPL-3 0000644 0001750 0001750 00000104513 11603266001 011614 0 ustar gg gg GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc.
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
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The licenses for most software and other practical works are designed
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share and change all versions of a program--to make sure it remains free
software for all its users. We, the Free Software Foundation, use the
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.
Image-Base-1.17/lib/ 0002755 0001750 0001750 00000000000 12006102212 011642 5 ustar gg gg Image-Base-1.17/lib/Image/ 0002755 0001750 0001750 00000000000 12006102212 012664 5 ustar gg gg Image-Base-1.17/lib/Image/Base.pm 0000644 0001750 0001750 00000062016 12006101446 014107 0 ustar gg gg package Image::Base ; # Documented at the __END__
use 5.004 ; # 5.004 for __PACKAGE__ special literal
use strict ;
use vars qw( $VERSION ) ;
$VERSION = '1.17' ;
use Carp qw( croak ) ;
# uncomment this to run the ### lines
#use Smart::Comments '###';
# All the supplied methods are expected to be inherited by subclasses; some
# will be adequate, some will need to be overridden and some *must* be
# overridden.
### Private methods
#
# _get object
# _set object
sub _get { # Object method
my $self = shift ;
# my $class = ref( $self ) || $self ;
$self->{shift()} ;
}
sub _set { # Object method
my $self = shift ;
# my $class = ref( $self ) || $self ;
my $field = shift ;
$self->{$field} = shift ;
}
sub DESTROY {
; # Save's time
}
### Public methods
sub new { croak __PACKAGE__ . "::new() must be overridden" }
sub xy { croak __PACKAGE__ . "::xy() must be overridden" }
sub load { croak __PACKAGE__ . "::load() must be overridden" }
sub save { croak __PACKAGE__ . "::save() must be overridden" }
sub set { croak __PACKAGE__ . "::set() must be overridden" }
sub get { # Object method
my $self = shift ;
# my $class = ref( $self ) || $self ;
my @result ;
push @result, $self->_get( shift() ) while @_ ;
wantarray ? @result : shift @result ;
}
sub new_from_image { # Object method
my $self = shift ; # Must be an image to copy
my $class = ref( $self ) || $self ;
my $newclass = shift ; # Class of target taken from class or object
croak "new_from_image() cannot read $class" unless $self->can( 'xy' ) ;
my( $width, $height ) = $self->get( -width, -height ) ;
# If $newclass was an object reference we inherit its characteristics
# except for width/height and any arguments we've supplied.
my $obj = $newclass->new( @_, -width => $width, -height => $height ) ;
croak "new_from_image() cannot convert to " . ref $obj unless $obj->can( 'xy' ) ;
for( my $x = 0 ; $x < $width ; $x++ ) {
for( my $y = 0 ; $y < $height ; $y++ ) {
$obj->xy( $x, $y, $self->xy( $x, $y ) ) ;
}
}
$obj ;
}
sub line { # Object method
my( $self, $x0, $y0, $x1, $y1, $colour ) = @_ ;
# basic Bressenham line drawing
my $dy = abs ($y1 - $y0);
my $dx = abs ($x1 - $x0);
#### $dy
#### $dx
if ($dx >= $dy) {
# shallow slope
( $x0, $y0, $x1, $y1 ) = ( $x1, $y1, $x0, $y0 ) if $x0 > $x1 ;
my $y = $y0 ;
my $ystep = ($y1 > $y0 ? 1 : -1);
my $rem = int($dx/2) - $dx;
for( my $x = $x0 ; $x <= $x1 ; $x++ ) {
#### $rem
$self->xy( $x, $y, $colour ) ;
if (($rem += $dy) >= 0) {
$rem -= $dx;
$y += $ystep;
}
}
} else {
# steep slope
( $x0, $y0, $x1, $y1 ) = ( $x1, $y1, $x0, $y0 ) if $y0 > $y1 ;
my $x = $x0 ;
my $xstep = ($x1 > $x0 ? 1 : -1);
my $rem = int($dy/2) - $dy;
for( my $y = $y0 ; $y <= $y1 ; $y++ ) {
#### $rem
$self->xy( $x, $y, $colour ) ;
if (($rem += $dx) >= 0) {
$rem -= $dy;
$x += $xstep;
}
}
}
}
# Midpoint ellipse algorithm from Computer Graphics Principles and Practice.
#
# The points of the ellipse are
# (x/a)^2 + (y/b)^2 == 1
# or expand out to
# x^2*b^2 + y^2*a^2 == a^2*b^2
#
# The x,y coordinates are taken relative to the centre $ox,$oy, with radials
# $a and $b half the width $x1-x0 and height $y1-$y0. If $x1-$x0 is odd,
# then $ox and $a are not integers but have 0.5 parts. Starting from $x=0.5
# and keeping that 0.5 means the final xy() pixels drawn in
# &$ellipse_point() are integers. Similarly for y.
#
# Only a few lucky pixels exactly satisfy the ellipse equation above. For
# the rest there's an error amount expressed as
#
# E(x,y) = x^2*b^2 + y^2*a^2 - a^2*b^2
#
# The first loop maintains a "discriminator" d1 in $d
#
# d1 = (x+1)^2*b^2 + (y-1/2)^2*a^2 - a^2*b^2
#
# which is E(x+1,y-1/2), being the error amount for the next x+1 position,
# taken at y-1/2 which is the midpoint between the possible next y or y-1
# pixels. When d1 > 0 it means that the y-1/2 position is outside the
# ellipse and the y-1 pixel is taken to be the better approximation to the
# ellipse than y.
#
# The first loop does the four octants near the Y axis, ie. the nearly
# horizontal parts. The second loop does the four octants near the X axis,
# ie. the nearly vertical parts. For the second loop the discriminator in
# $d is instead at the next y-1 position and between x and x+1,
#
# d2 = E(x+1/2,y-1) = (x+1/2)^2*b^2 + (y-1)^2*a^2 - a^2*b^2
#
# The difference between d1 and d2 for the changeover is as follows and is
# used to step across to the new position rather than a full recalculation.
# Not much difference in speed, but less code.
#
# E(x+1/2,y-1) - E(x+1,y-1/2)
# = -b^2 * (x + 3/4) + a^2 * (3/4 - y)
#
# since (x+1/2)^2 - (x+1)^2 = -x - 3/4
# (y-1)^2 - (y-1/2)^2 = -y + 3/4
#
#
# Other Possibilities:
#
# The calculations could be made all-integer by counting $x and $y from 0 at
# the bounding box edges and measuring inwards, rather than outwards from a
# fractional centre. E(x,y) could have a factor of 2 or 4 put through as
# necessary, the discriminating >0 or <0 staying the same. The d1 and d2
# steps are at most roughly 2*max(a*b^2,b*a^2), which for a circle means
# 2*r^3. This fits a 32-bit signed integer for up to about 1000 pixels or
# so, and then of course Perl switches to 53-bit floats automatically, which
# is still an exact integer up to about 160,000 pixels radius.
#
# It'd be possible to draw runs of horizontal pixels with line() instead of
# individual xy() calls. That might help subclasses doing a block-fill for
# a horizontal line segment. Except only big or flat ellipses have more
# than a few adjacent horizontal pixels. Perhaps just the initial topmost
# horizontal, using a sqrt to calculate where it crosses from the top y=b
# down to y=b-1.
#
# The end o the first loop could be pre-calculated (with a sqrt), if that
# seemed better than watching $aa*($y-0.5) vs $bb*($x+1). The loop change
# is where the tangent slope is steeper than -1. Drawing a little diagram
# shows that an x+0,y+1 downward step like in the second loop is not needed
# until that point.
#
# dx/dy = -x*b^2 / y*a^2 = -1 slope
# y = x*b^2/a^2
# b^2*x^2 + a^2*(b^4/a^4)*x^2 = a^2*b^2 into the ellipse equation
# x^2 * (1 + b^2/a^2) = a^2
# x = a * sqrt (a^2 / (a^2 + b^2))
# = a^2 / sqrt (a^2 + b^2)
#
sub ellipse { # Object method
my $self = shift ;
# my $class = ref( $self ) || $self ;
my( $x0, $y0, $x1, $y1, $colour, $fill ) = @_ ;
# per the docs, x0,y0 top left, x1,y1 bottom right
# could relax that fairly easily, if desired ...
### assert: $x0 <= $x1
### assert: $y0 <= $y1
my ($a, $b);
if (($a = ( $x1 - $x0 ) / 2) <= .5
|| ($b = ( $y1 - $y0 ) / 2) <= .5) {
# one or two pixels high or wide, treat as rectangle
$self->rectangle ($x0, $y0, $x1, $y1, $colour );
return;
}
my $aa = $a ** 2 ;
my $bb = $b ** 2 ;
my $ox = ($x0 + $x1) / 2;
my $oy = ($y0 + $y1) / 2;
my $x = $a - int($a) ; # 0 or 0.5
my $y = $b ;
### initial: "origin $ox,$oy start xy $x,$y"
my $ellipse_point =
($fill
? sub {
### ellipse_point fill: "$x,$y"
$self->line( $ox - $x, $oy + $y,
$ox + $x, $oy + $y, $colour ) ;
$self->line( $ox - $x, $oy - $y,
$ox + $x, $oy - $y, $colour ) ;
}
: sub {
### ellipse_point xys: "$x,$y"
$self->xy( $ox + $x, $oy + $y, $colour ) ;
$self->xy( $ox - $x, $oy - $y, $colour ) ;
$self->xy( $ox + $x, $oy - $y, $colour ) ;
$self->xy( $ox - $x, $oy + $y, $colour ) ;
});
# Initially,
# d1 = E(x+1,y-1/2)
# = (x+1)^2*b^2 + (y-1/2)^2*a^2 - a^2*b^2
# which for x=0,y=b is
# = b^2 - a^2*b + a^2/4
# or for x=0.5,y=b
# = 9/4*b^2 - ...
#
my $d = ($x ? 2.25*$bb : $bb) - ( $aa * $b ) + ( $aa / 4 ) ;
while( $y >= 1
&& ( $aa * ( $y - 0.5 ) ) > ( $bb * ( $x + 1 ) ) ) {
### assert: $d == ($x+1)**2 * $bb + ($y-.5)**2 * $aa - $aa * $bb
if( $d < 0 ) {
if (! $fill) {
# unfilled draws each pixel, but filled waits until stepping
# down "--$y" and then draws whole horizontal line
&$ellipse_point();
}
$d += ( $bb * ( ( 2 * $x ) + 3 ) ) ;
++$x ;
}
else {
&$ellipse_point();
$d += ( ( $bb * ( ( 2 * $x ) + 3 ) ) +
( $aa * ( ( -2 * $y ) + 2 ) ) ) ;
++$x ;
--$y ;
}
}
# switch to d2 = E(x+1/2,y-1) by adding E(x+1/2,y-1) - E(x+1,y-1/2)
$d += $aa*(.75-$y) - $bb*($x+.75);
### assert: $d == $bb*($x+0.5)**2 + $aa*($y-1)**2 - $aa*$bb
### second loop at: "$x, $y"
while( $y >= 1 ) {
&$ellipse_point();
if( $d < 0 ) {
$d += ( $bb * ( ( 2 * $x ) + 2 ) ) +
( $aa * ( ( -2 * $y ) + 3 ) ) ;
++$x ;
--$y ;
}
else {
$d += ( $aa * ( ( -2 * $y ) + 3 ) ) ;
--$y ;
}
### assert: $d == $bb*($x+0.5)**2 + $aa*($y-1)**2 - $aa*$bb
}
# loop ends with y=0 or y=0.5 according as the height is odd or even,
# leaving one or two middle rows to draw out to x0 and x1 edges
### assert: $y == $b - int($b)
if ($fill) {
### middle fill: "y ".($oy-$y)." to ".($oy+$y)
$self->rectangle( $x0, $oy - $y,
$x1, $oy + $y,
$colour, 1 ) ;
} else {
# middle tails from $x out to the left/right edges
# $x can be several pixels less than $a if small height large width
### tail: "y=$y, left $x0 to ".($ox-$x).", right ".($ox+$x)." to $x1"
$self->rectangle( $x0, $oy - $y, # left
$ox - $x, $oy + $y,
$colour, 1 ) ;
$self->rectangle( $ox + $x, $oy - $y, # right
$x1, $oy + $y,
$colour, 1 ) ;
}
}
sub rectangle { # Object method
my ($self, $x0, $y0, $x1, $y1, $colour, $fill) = @_;
if ($x0 == $x1) {
# vertical line only
$self->line( $x0, $y0, $x1, $y1, $colour ) ;
} else {
if ($fill) {
for( my $y = $y0 ; $y <= $y1 ; $y++ ) {
$self->line( $x0, $y, $x1, $y, $colour ) ;
}
} else { # unfilled
$self->line( $x0, $y0,
$x1, $y0, $colour ) ; # top
if (++$y0 <= $y1) {
# height >= 2
if ($y0 < $y1) {
# height >= 3, verticals
$self->line( $x0, $y0,
$x0, $y1-1, $colour ) ; # left
$self->line( $x1, $y0,
$x1, $y1-1, $colour ) ; # right
}
$self->line( $x1, $y1,
$x0, $y1, $colour ) ; # bottom
}
}
}
}
sub diamond {
my ($self, $x1,$y1, $x2,$y2, $colour, $fill) = @_;
### diamond(): "$x1,$y1, $x2,$y2, $colour fill=".($fill||0)
### assert: $x2 >= $x1
### assert: $y2 >= $y1
my $w = $x2 - $x1;
my $h = $y2 - $y1;
if ($w < 2 || $h < 2) {
$self->rectangle ($x1,$y1, $x2,$y2, $colour, 1);
return;
}
$w = int ($w / 2);
$h = int ($h / 2);
my $x = $w; # middle
my $y = 0; # top
### $w
### $h
### x1+x: $x1+$w
### x2-x: $x2-$w
### y1+y: $y1+$h
### y2-y: $y2-$h
my $draw;
if ($fill) {
$draw = sub {
### draw across: "$x,$y"
$self->line ($x1+$x,$y1+$y, $x2-$x,$y1+$y, $colour); # upper
$self->line ($x1+$x,$y2-$y, $x2-$x,$y2-$y, $colour); # lower
};
} else {
$draw = sub {
### draw: "$x,$y"
$self->xy ($x1+$x,$y1+$y, $colour); # upper left
$self->xy ($x2-$x,$y1+$y, $colour); # upper right
$self->xy ($x1+$x,$y2-$y, $colour); # lower left
$self->xy ($x2-$x,$y2-$y, $colour); # lower right
};
}
if ($w > $h) {
### shallow ...
my $rem = int($w/2) - $w;
### $rem
while ($x > 0) {
### at: "x=$x rem=$rem"
if (($rem += $h) >= 0) {
&$draw();
$y++;
$rem -= $w;
$x--;
} else {
if (! $fill) { &$draw() }
$x--;
}
}
} else {
### steep ...
# when $h is odd bias towards pointier at the narrower top/bottom ends
my $rem = int(($h-1)/2) - $h;
### $rem
while ($y < $h) {
### $rem
&$draw();
if (($rem += $w) >= 0) {
$rem -= $h;
$x--;
### x inc to: "x=$x rem $rem"
}
$y++;
}
}
### final: "$x,$y"
# middle row if $h odd, or middle two rows if $h even
# done explicitly rather than with &$draw() so as not to draw the middle
# row twice when $h odd
if ($fill) {
$self->rectangle ($x1,$y1+$h, $x2,$y2-$h, $colour, 1);
} else {
$self->rectangle ($x1,$y1+$h, $x1+$x,$y2-$h, $colour, 1); # left
$self->rectangle ($x2-$x,$y1+$h, $x2,$y2-$h, $colour, 1); # right
}
}
sub add_colours {
# my ($self, $colour, $colour, ...) = @_;
}
1 ;
__END__
=head1 NAME
Image::Base - base class for loading, manipulating and saving images.
=head1 SYNOPSIS
# base class only
package My::Image::Class;
use base 'Image::Base';
=head1 DESCRIPTION
This is a base class for image. It shouldn't be used directly. Known
inheritors are C and C and in see L
below.
use Image::Xpm ;
my $i = Image::Xpm->new( -file => 'test.xpm' ) ;
$i->line( 1, 1, 3, 7, 'red' ) ;
$i->ellipse( 3, 3, 6, 7, '#ff00cc' ) ;
$i->rectangle( 4, 2, 9, 8, 'blue' ) ;
Subclasses like C and C are stand-alone Perl code
implementations of the respective formats. They're good for drawing and
manipulating image files with a modest amount of code and dependencies.
Other inheritors like C are front-ends to big image
libraries. They can be handy for pointing generic C style code
at a choice of modules and supported file formats. Some inheritors like
C even go to a window etc for direct
display.
=head2 More Methods
If you want to create your own algorithms to manipulate images in terms of
(x,y,colour) then you could extend this class (without changing the file),
like this:
# Filename: mylibrary.pl
package Image::Base ; # Switch to this class to build on it.
sub mytransform {
my $self = shift ;
my $class = ref( $self ) || $self ;
# Perform your transformation here; might be drawing a line or filling
# a rectangle or whatever... getting/setting pixels using $self->xy().
}
package main ; # Switch back to the default package.
Now if you C mylibrary.pl after you've C