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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
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<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/LegacyTechnologies/index.html">Legacy Documents</a> > <a href="../../samplecode/LegacyTechnologies/idxQuickTime-date.html">QuickTime</a> > <A HREF="javascript:location.replace('index.html');">CurvesDemo</A> >
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<div style="width:100%; position:fixed;"><div align="center" id="watermark" style="position: relative; margin-left:auto; margin-right:auto; z-index:20; width:500px;"><div class="legacybox"><h1>Legacy Document<span class=closebutton><a href="javascript:closeWatermark()"><img src="../../images/closebutton.png" width="14" height="14" border="0" alt="close button"></a></span></h1>
<p><strong>Important: </strong>This document is part of the Legacy section of the ADC Reference Library. This information should not be used for new development.</p>
<div class="reflibtopic">
<p>Current information on this Reference Library topic can be found here:</p>
<ul>
<li><a href="http://developer.apple.com/referencelibrary/QuickTime/idxJava-date.html" target="_blank">QuickTime > Java</a></li>
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<p><strong><a href="CurvesDemo.zip">Download Sample</a></strong> (“CurvesDemo.zip”, 30.4K)<BR>
<strong><a href="CurvesDemo.dmg">Download Sample</a></strong> (“CurvesDemo.dmg”, 89.2K)</p>
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<!--googleon: index -->
<pre class="sourcecodebox">=============================================================================
QuickTime for Java SDK Updated: 13 Sept 1999
Read Me Notes to "CurvesDemo" Demo and Sample Code
=============================================================================
This demo program shows how to use the Curve Codec in QuickTime to draw a
vector Graphic image.
=============================================================================
The minimum runtime requirements for this Sample Code are:
- Common
- Sun Compliant Java Runtime Environment 1.1
- QuickTime 3
- QTJava.zip
- MacOS:
- System 8 or later
- Macintosh Runtime for Java (MRJ) 2.1
- Mac OS X
- 10.0 or later
- Windows 95, 98, NT, 2000 or XP.
- JRE/JDK from Sun Microsystems, Inc. recommended
=============================================================================
Media requirements - none
=============================================================================
Notes & Comments
In the QTVector Demo we build the image Data by constructing raw atoms
representing the point data. QuickTime 4.0 added
API's that simplify this tremendously. We demonstrate the same example with use
of these API calls. It should be noted that all the Endian
flipping of the data is done internally by the QTJava classes otherwise its
explicitly mentioned in the docs.
A vector image is created via an IntEncodedImage object. The IntEncodedImage
contains the meta instructions which are then interpreted
by the curve codec. It is possible to build a list of IntEncodedImages which
can then be passed to an ImagePresenter by using the
setImageData call on the imagePresenter class.
=============================================================================
General Comments
- QTSession.open and close:
A QTSession.open will perform a gestalt check to ensure that QuickTime is
present and is initialized. This is a required call before any QuickTime Java
classes can be used.
When the user closes the window the program will quit, first calling
QTSession.close to terminate QuickTime. It is necessary for programs to call
QTSession.close if they have previously called QTSession.open in order to shut
down QuickTime properly.
=============================================================================
QuickTime and QuickTime for Java are trademarks of Apple Computer, Inc.
(c) 1998 Apple Computer Inc. All rights reserved.
</pre>
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