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 <[email protected]> wrote the original GD plugins for the Template Toolkit (2001).
Andy Wardley <[email protected]> extracted them from the TT core into a separate distribution for TT version 2.15.