Zend\Barcode Renderers

Renderers have some common options. These options can be set in three ways:

• As an array or a Traversable object passed to the constructor.
• As an array passed to the setOptions() method.
• As discrete values passed to individual setters.

Different ways to parameterize a renderer object

use Zend\Barcode\Renderer;

$options = array('topOffset' => 10);

// Case 1
$renderer = new Renderer\Pdf($options);

// Case 2
$renderer = new Renderer\Pdf();
$renderer->setOptions($options);

// Case 3
$renderer = new Renderer\Pdf();
$renderer->setTopOffset(10);

Common Options

In the following list, the values have no unit; we will use the term “unit.” For example, the default value of the “thin bar” is “1 unit.” The real units depend on the rendering support. The individual setters are obtained by uppercasing the initial letter of the option and prefixing the name with “set” (e.g. “barHeight” => “setBarHeight”). All options have a correspondent getter prefixed with “get” (e.g. “getBarHeight”). Available options are:

Common Options

Option	Data Type	Default Value	Description
rendererNamespace	String	Zend\Barcode\Renderer	Namespace of the renderer; for example, if you need to extend the renderers
horizontalPosition	String	“left”	Can be “left”, “center” or “right”. Can be useful with PDF or if the setWidth() method is used with an image renderer.
verticalPosition	String	“top”	Can be “top”, “middle” or “bottom”. Can be useful with PDF or if the setHeight() method is used with an image renderer.
leftOffset	Integer	0	Top position of the barcode inside the renderer. If used, this value will override the “horizontalPosition” option.
topOffset	Integer	0	Top position of the barcode inside the renderer. If used, this value will override the “verticalPosition” option.
automaticRenderError	Boolean	FALSE	Whether or not to automatically render errors. If an exception occurs, the provided barcode object will be replaced with an Error representation. Note that some errors (or exceptions) can not be rendered.
moduleSize	Float	1	Size of a rendering module in the support.
barcode	Zend\Barcode\Object	NULL	The barcode object to render.

An additional getter exists: getType(). It returns the name of the renderer class without the namespace (e.g. Zend\Barcode\Renderer\Image returns “image”).

Zend\Barcode\Renderer\Image

The Image renderer will draw the instruction list of the barcode object in an image resource. The component requires the GD extension. The default width of a module is 1 pixel.

Available options are:

Zend\Barcode\Renderer\Image Options

Option	Data Type	Default Value	Description
height	Integer	0	Allow you to specify the height of the result image. If “0”, the height will be calculated by the barcode object.
width	Integer	0	Allow you to specify the width of the result image. If “0”, the width will be calculated by the barcode object.
imageType	String	“png”	Specify the image format. Can be “png”, “jpeg”, “jpg” or “gif”.

Zend\Barcode\Renderer\Pdf

The PDF renderer will draw the instruction list of the barcode object in a PDF document. The default width of a module is 0.5 point.

There are no particular options for this renderer.