Page 114 - DCAP512_WAP_AND_WML

WAP & WML

Notes Figure 8.1

Example: Examples of WMBP graphics in a WAP application
Images are added to the document with the <img/> element. Make sure that it is placed
within <p> tags, as shown in this example:
<card>
<p><img src=”logo.wbmp” alt=”Cookbook Logo”></p>
</card>
Some mobile devices have stored in their memory a library of small images that can be placed
in the WML document using the localsrc attribute in the image tag. The advantage of local
images is that they reduce the amount of data that needs to be transferred from the server, so
they display more quickly than external WBMP files. It is a good idea also to provide a pointer
to an external graphic in case local images are not supported. The following example requests a
generic credit card icon from the local image library and specifies an alternative .wbmp file.
The alt text will display on devices that do not support graphics at all.
<img localsrc=”creditcard” src=”card.wbmp” alt=”credit card symbol”>

A complete list of library images and their names is available athttp://developer.phone.com/
htmldoc/41/wmlref/taglist.html#575099.

Task Analyze the advantages of localscr images in WML with example.
Creating WBMP Graphics: There are few tools available that can create WBMP files at this time.
However, you can download the free UnWired plug-in from RCP Distributed Systems that
enables you to create WBMP files in Adobe Photoshop 5 and higher and JASC Paint Shop Pro (or
any graphics package that supports plug-ins). It is available at http://www.rcp.co.uk/
distributed/downloads/.There is also a Java utility called pic_2_wbmp that converts existing
BMP files to WBMP format. It is available at http://www.gingco.de/wap/.

Self Assessment

Fill in the blanks:
6. No graphic should exceed ……………….. pixels square.
7. WBMP files are ……………….. graphics capable of displaying only black and white pixels.
8. You can download the free ……………….. plug-in from RCP Distributed Systems that
enables you to create WBMP files in Adobe Photoshop 5.
9. The advantage of local images is that they ……………….. the amount of data that needs to
be transferred from the server, so they display more quickly than external WBMP files.

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