epubjs
Version:
Render ePub documents in the browser, across many devices
20 lines (19 loc) • 2.78 kB
HTML
<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Chapter 21. Working with Images and Other Media</title><link rel="stylesheet" href="core.css" type="text/css"/><meta name="generator" content="DocBook XSL Stylesheets V1.74.0"/></head><body><div class="chapter" title="Chapter 21. Working with Images and Other Media"><div class="titlepage"><div><div><h1 class="title"><a id="learnjava3-CHP-21"/>Chapter 21. Working with Images and Other Media</h1></div></div></div><p>Until this point, we’ve confined ourselves to working with the
high-level drawing commands of the <code class="literal">Graphics2D</code> class, using images in a hands-off
mode. In this section, we’ll clear up some of the mystery surrounding images
and see how they can be created and transformed. The classes in the <code class="literal">java.awt.image</code> package handle images and their
internals; <a class="xref" href="ch21.html#learnjava3-CHP-21-FIG-1" title="Figure 21-1. The java.awt.image package">Figure 21-1</a> shows the important
classes in this package.</p><p>First, we’ll return to our discussion of image loading and see how we
can get more control over image data using an <code class="literal">ImageObserver</code> to watch as it’s processed
asynchronously by GUI components. We’ll also see how to use the <code class="literal">MediaTracker</code> utility to handle the details for us.
Then, we’ll move on to the good stuff and have a look at <code class="literal">BufferedImage</code>, which is an image whose pixel data
is exposed to you through a memory buffer. If you’re interested in creating
sophisticated graphics, rendered images, or video, this will teach you about
the foundations of image construction in Java.</p><p>Looking in the other directions, we will also be referring
occasionally to the <code class="literal">javax.imageio</code> package, which is part of
the <a id="I_indexterm21_id815413" class="indexterm"/><a id="I_indexterm21_id815418" class="indexterm"/>Java Advanced Imaging API (JAI). If you need even more
advanced capabilities such as image tiling, loading scaled versions of
images over the network, and deferred execution of image data processing for
working with really large images, you’ll want to look at JAI.</p><div class="figure"><a id="learnjava3-CHP-21-FIG-1"/><div class="figure-contents"><div class="mediaobject"><a id="I_21_tt1175"/><img src="httpatomoreillycomsourceoreillyimages1707698.png" alt="The java.awt.image package"/></div></div><p class="title">Figure 21-1. The java.awt.image package</p></div></div></body></html>