NAME

Template::Plugin::GD::Image - Interface to GD Graphics Library

SYNOPSIS

[% USE im = GD.Image(width, height) %]

EXAMPLES

[% FILTER null;
    USE gdc = GD.Constants;
    USE im  = GD.Image(200,100);
    black = im.colorAllocate(0  ,0,  0);
    red   = im.colorAllocate(255,0,  0);
    r = im.string(gdc.gdLargeFont, 10, 10, "Large Red Text", red);
    im.png | stdout(1);
   END;
-%]
[% FILTER null;
    USE im = GD.Image(100,100);
    # allocate some colors
    black = im.colorAllocate(0,   0, 0);
    red   = im.colorAllocate(255,0,  0);
    blue  = im.colorAllocate(0,  0,  255);
    # Draw a blue oval
    im.arc(50,50,95,75,0,360,blue);
    # And fill it with red
    im.fill(50,50,red);
    # Output binary image in PNG format
    im.png | stdout(1);
   END;
-%]
[% FILTER null;
    USE im   = GD.Image(100,100);
    USE c    = GD.Constants;
    USE poly = GD.Polygon;
    # allocate some colors
    white = im.colorAllocate(255,255,255);
    black = im.colorAllocate(0,  0,  0);
    red   = im.colorAllocate(255,0,  0);
    blue  = im.colorAllocate(0,  0,255);
    green = im.colorAllocate(0,  255,0);
    # make the background transparent and interlaced
    im.transparent(white);
    im.interlaced('true');
    # Put a black frame around the picture
    im.rectangle(0,0,99,99,black);
    # Draw a blue oval
    im.arc(50,50,95,75,0,360,blue);
    # And fill it with red
    im.fill(50,50,red);
    # Draw a blue triangle
    poly.addPt(50,0);
    poly.addPt(99,99);
    poly.addPt(0,99);
    im.filledPolygon(poly, blue);
    # Output binary image in PNG format
    im.png | stdout(1);
   END;
-%]

DESCRIPTION

The GD.Image plugin provides an interface to GD.pm's GD::Image class. The GD::Image class is the main interface to GD.pm.

It is very important that no extraneous template output appear before or after the image. Since some methods return values that would otherwise appear in the output, it is recommended that GD.Image code be wrapped in a null filter. The methods that produce the final output (eg, png, jpeg, gd etc) can then explicitly make their output appear by using the stdout filter, with a non-zero argument to force binary mode (required for non-modern operating systems).

See GD for a complete description of the GD library and all the methods that can be called via the GD.Image plugin. See Template::Plugin::GD::Constants for a plugin that allows you access to GD.pm's constants.

AUTHOR

Thomas Boutell wrote the GD graphics library.

Lincoln D. Stein wrote the Perl GD modules that interface to it.

Craig Barratt <craig@arraycomm.com> wrote the original GD plugins for the Template Toolkit (2001).

Andy Wardley <abw@cpan.org> extracted them from the TT core into a separate distribution for TT version 2.15.

COPYRIGHT

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