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graphics::primitive(3pm) [debian man page]

Graphics::Primitive(3pm)				User Contributed Perl Documentation				  Graphics::Primitive(3pm)

NAME

       Graphics::Primitive - Device and library agnostic graphic primitives

SYNOPSIS

       Graphics::Primitive is a device and library agnostic system for creating and manipulating various graphical elements such as Borders,
       Fonts, Paths and the like.

	   my $c = Graphics::Primitive::Component->new(
	     background_color => Graphics::Color::RGB->new(
		 red => 1, green => 0, blue => 0
	     ),
	     width => 500, height => 350,
	     border => new Graphics::Primitive::Border->new( width => 5 )
	   );

	   my $driver = Graphics::Primitive::Driver::Cairo->new(format => 'SVG');

	   $driver->prepare($c);
	   $driver->finalize($c);
	   $driver->draw($c);

	   $driver->write($filename)

DESCRIPTION

       Graphics::Primitive is library agnostic system for drawing things.

       The idea is to allow you to create and manipulate graphical components and then pass them off to a Driver for actual drawing.

CONCEPTS

       The root object for Graphics::Primitive is the Component.  Components contain all the common elements that you'd expect: margins, padding,
       background color etc.

       The next most important is the Container.  Containers are Components that can hold other Components.  Containers have all the attributes
       and methods of a Component with the addition of the layout_manager attribute for us with Layout::Manager.

       Another important Component is the Canvas.  The Canvas differs from other components by being a container for various Geometry::Primitive
       objects.  This allows drawing of arbitrary shapes that do not fit existing components.

DRAWING LIFECYCLE

       After creating all your components, there is a lifecycle that allows them to do their internal housekeeping to prepare for eventual
       drawing.  The lifecycle is: prepare, layout and pack.  Detailed explanation of these methods can be found in Component.

PREPARATION

       Graphics::Primitive::Component has a "prepared" flag.  This flag is set as part of the "prepare" method (shocking, I know).  If this flag
       is set, then subsequent calls to "prepare" are ignored.	Containers also have a prepare flag, but this flag is not set when calling
       "prepare".  A Container's flag should be set by the layout manager.  More information may be found with Layout::Manager.

INSPIRATION

       Most of the concepts that you'll find in Graphics::Primitive are inspired by Cairo <http://cairographics.org>'s API and CSS
       <http://www.w3.org/Style/CSS/>'s box model.

AUTHOR

       Cory Watson, "<gphat@cpan.org>"

CONTRIBUTORS

       Florian Ragwitz

ACKNOWLEDGEMENTS

       Many of the ideas here come from my experience using the Cairo library.

COPYRIGHT &; LICENSE
       Copyright 2008-2010 by Cory G Watson.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.12.3							    2011-06-02						  Graphics::Primitive(3pm)

Check Out this Related Man Page

Graphics::Primitive::Brush(3pm) 			User Contributed Perl Documentation			   Graphics::Primitive::Brush(3pm)

NAME

       Graphics::Primitive::Brush - Description of a stroke

DESCRIPTION

       Graphics::Primitive::Brush represents the visible trace of 'ink' along a path.

SYNOPSIS

	 use Graphics::Primitive::Brush;

	 my $stroke = Graphics::Primitive::Brush->new({
	   line_cap => 'round',
	   line_join => 'miter',
	   width => 2
	 });

METHODS

   Constructor
       new Creates a new Graphics::Primitive::Brush.  Defaults to a width of 1, a line_cap 'butt' and a line_join of 'miter'.

   Instance Methods
       color
	   Set/Get this brush's color.

       dash_pattern
	   Set/Get the dash pattern.  A dash pattern is an arrayref of numbers representing the lengths of the various line segments of the dash.
	   Even numbered elements are considered opaque and odd elements are transparent.

       derive
	   Clone this brush but change one or more of it's attributes by passing in a hashref of options:

	     my $new = $brush->derive({ attr => $newvalue });

	   The returned font will be identical to the cloned one, save the attributes specified.

       equal_to ($other)
	   Returns 1 if this brush is equal to the supplied one, else returns 0.

       line_cap
	   Set/Get the line_cap of this stroke.  Valid values are butt, round and square.

       line_join
	   Set/Get the line_join of this stroke. Valid values are miter, round and bevel.

       not_equal_to ($other)
	   Opposite of equal_to.

       width
	   Set/Get the width of this stroke.  Defaults to 1

AUTHOR

       Cory Watson, "<gphat@cpan.org>"

COPYRIGHT &; LICENSE
       Copyright 2008-2010 by Cory G Watson.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.12.3							    2010-08-21					   Graphics::Primitive::Brush(3pm)
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