/ 
Games-Chess-Coverage-0.0101
/ Games::Chess::Coverage::Draw

NAME

Games::Chess::Coverage::Draw - Base class for visualizing chess coverage

DESCRIPTION

Represent chess coverage with a drawing module such as GD or Imager and plug-in rules based on board settings.

This module is the base class for specific drawing modules and is not to be used directly.

Please see the examples in the distribution eg/ directory.

METHODS

new

$drawing = Games::Chess::Coverage::Draw->new( %args );

Construct a fresh Games::Chess::Coverage::Draw instance.

Here are the construction options with their default settings:

coverage      => undef,
out_file      => 'test',
image         => undef,
image_type    => 'png',
max_coord     => 7,
board_size    => 8,
border        => 2,
left_margin   => 20,
bottom_margin => 20,
square_width  => 33,
square_height => 33

Object arguments computed on initialization:

image_width, image_height,
x0, y0, x1, y1

add_rule

$drawing->add_rule( $rule, \%colors );

Add a Games::Chess::Coverage::Draw plugin where the rule is a package containing a subroutine named for itself. The rules are kept in an ordered list so that they can be applied in a determined sequence.

Specific drawing modules such as Games::Chess::Coverage::Imager or Games::Chess::Coverage::GD must also define this method in order to create or allocate the necessary colors. Please see the source code of these modules for the specific details involved.

draw

$img = $drawing->draw;

Apply the defined drawing rules to the image.

SEE ALSO

Games::Chess

Games::Chess::Coverage

Games::Chess::Coverage::Imager

Games::Chess::Coverage::GD

TO DO

Make this an XBoard engine. Maybe draw a transparent image over the board itself.

Describe the meta-API. That is user defined pieces, rules and colorings.

Figure out if ChessVision already does this all better and then assimilate it's brains.

CVS

$Id: Draw.pm,v 1.7 2004/05/09 23:33:11 gene Exp $