qtimageproducer.html

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<A NAME="QTImageProducer(quicktime.app.display.QTDrawable, java.awt.Dimension)"><!-- --></A><H3>
QTImageProducer</H3>
<PRE>
public <B>QTImageProducer</B>(<A HREF="../../../quicktime/app/display/QTDrawable.html">QTDrawable</A>&nbsp;qtSource,
                       java.awt.Dimension&nbsp;initSize)
                throws <A HREF="../../../quicktime/QTException.html">QTException</A></PRE>
<DL>
<DD>Creates an ImageProducer from the specified qtSource. The initialSize of the 
 qtSource should be specified to get the best pixel resolution of the source
 material.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>qtSource</CODE> - the source of pixel data for the ImageProducer.<DD><CODE>initSize</CODE> - the intial size of the source data</DL>
</DD>
</DL>

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<B>Method Detail</B></FONT></TD>
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<A NAME="getGWorld()"><!-- --></A><H3>
getGWorld</H3>
<PRE>
public <A HREF="../../../quicktime/qd/QDGraphics.html">QDGraphics</A> <B>getGWorld</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="isSingleFrame()"><!-- --></A><H3>
isSingleFrame</H3>
<PRE>
public boolean <B>isSingleFrame</B>()</PRE>
<DL>
<DD>Returns true if the Redrawable only has a single frame to render and thus
 will never need to re-acquire or redraw its image. Certain Redrawable objects
 are able to optimise their resources knowing this constraint.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="../../../quicktime/app/image/Redrawable.html#isSingleFrame()">isSingleFrame</A></CODE> in interface <CODE><A HREF="../../../quicktime/app/image/Redrawable.html">Redrawable</A></CODE></DL>
</DD>
<DD>Following copied from interface: <CODE>quicktime.app.image.Redrawable</CODE></DD>
<DD><DL>
<DT><B>Returns:</B><DD>a boolean</DL>
</DD>
</DL>
<HR>

<A NAME="addConsumer(java.awt.image.ImageConsumer)"><!-- --></A><H3>
addConsumer</H3>
<PRE>
public void <B>addConsumer</B>(java.awt.image.ImageConsumer&nbsp;ic)</PRE>
<DL>
<DD>This method is used to register an ImageConsumer with the
 ImageProducer for access to the image data during a later
 reconstruction of the Image.  The ImageProducer may, at its
 discretion, start delivering the image data to the consumer
 using the ImageConsumer interface immediately, or when the
 next available image reconstruction is triggered by a call
 to the startProduction method.<DD><DL>
<DT><B>Specified by: </B><DD><CODE>addConsumer</CODE> in interface <CODE>java.awt.image.ImageProducer</CODE></DL>
</DD>
<DD><DL>
<DT><B>See Also: </B><DD><A HREF="../../../quicktime/app/image/QTImageProducer.html#startProduction(java.awt.image.ImageConsumer)"><CODE>startProduction(java.awt.image.ImageConsumer)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="isConsumer(java.awt.image.ImageConsumer)"><!-- --></A><H3>
isConsumer</H3>
<PRE>
public boolean <B>isConsumer</B>(java.awt.image.ImageConsumer&nbsp;ic)</PRE>
<DL>
<DD>This method determines if a given ImageConsumer object
 is currently registered with this ImageProducer as one
 of its consumers.<DD><DL>
<DT><B>Specified by: </B><DD><CODE>isConsumer</CODE> in interface <CODE>java.awt.image.ImageProducer</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="removeConsumer(java.awt.image.ImageConsumer)"><!-- --></A><H3>
removeConsumer</H3>
<PRE>
public void <B>removeConsumer</B>(java.awt.image.ImageConsumer&nbsp;ic)</PRE>
<DL>
<DD>This method removes the given ImageConsumer object
 from the list of consumers currently registered to
 receive image data.  It is not considered an error
 to remove a consumer that is not currently registered.
 The ImageProducer should stop sending data to this
 consumer as soon as is feasible.<DD><DL>
<DT><B>Specified by: </B><DD><CODE>removeConsumer</CODE> in interface <CODE>java.awt.image.ImageProducer</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="startProduction(java.awt.image.ImageConsumer)"><!-- --></A><H3>
startProduction</H3>
<PRE>
public void <B>startProduction</B>(java.awt.image.ImageConsumer&nbsp;ic)</PRE>
<DL>
<DD>This method both registers the given ImageConsumer object
 as a consumer and starts an immediate reconstruction of
 the image data which will then be delivered to this
 consumer and any other consumer which may have already
 been registered with the producer.  This method differs
 from the addConsumer method in that a reproduction of
 the image data should be triggered as soon as possible.<DD><DL>
<DT><B>Specified by: </B><DD><CODE>startProduction</CODE> in interface <CODE>java.awt.image.ImageProducer</CODE></DL>
</DD>
<DD><DL>
<DT><B>See Also: </B><DD><A HREF="../../../quicktime/app/image/QTImageProducer.html#addConsumer(java.awt.image.ImageConsumer)"><CODE>addConsumer(java.awt.image.ImageConsumer)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="requestTopDownLeftRightResend(java.awt.image.ImageConsumer)"><!-- --></A><H3>
requestTopDownLeftRightResend</H3>
<PRE>
public void <B>requestTopDownLeftRightResend</B>(java.awt.image.ImageConsumer&nbsp;ic)</PRE>
<DL>
<DD>This method is used by an ImageConsumer to request that
 the ImageProducer attempt to resend the image data one
 more time in TOPDOWNLEFTRIGHT order so that higher
 quality conversion algorithms which depend on receiving
 pixels in order can be used to produce a better output
 version of the image.  The ImageProducer is free to
 ignore this call if it cannot resend the data in that
 order.  If the data can be resent, then the ImageProducer
 should respond by executing the following minimum set of
 ImageConsumer method calls:
 <pre>
	ic.setHints(TOPDOWNLEFTRIGHT | < otherhints >);
	ic.setPixels(...);	// As many times as needed
	ic.imageComplete();
 </pre><DD><DL>
<DT><B>Specified by: </B><DD><CODE>requestTopDownLeftRightResend</CODE> in interface <CODE>java.awt.image.ImageProducer</CODE></DL>
</DD>
<DD><DL>
<DT><B>See Also: </B><DD><CODE>ImageConsumer.setHints(int)</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="redraw(quicktime.qd.Region)"><!-- --></A><H3>
redraw</H3>
<PRE>
public void <B>redraw</B>(<A HREF="../../../quicktime/qd/Region.html">Region</A>&nbsp;invalidRgn)
            throws <A HREF="../../../quicktime/QTException.html">QTException</A></PRE>
<DL>
<DD>This method is called to redraw the QuickTime image source and
 update any of the current ImageConsumers with the new pixels that have been generated.
 This update will only be done if the redrawing flag is true.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>invalidRgn</CODE> - if null the whole image is redrawn and all of the pixels
 are grabbed and sent to the consumers. If not null then the qtSource
 invalidates the region specified, which can result in a faster draw. Also only those
 pixels that are within the bounds of the region are sent to the consumers.</DL>
</DD>
</DL>
<HR>

<A NAME="updateConsumers(quicktime.qd.Region)"><!-- --></A><H3>
updateConsumers</H3>
<PRE>
public void <B>updateConsumers</B>(<A HREF="../../../quicktime/qd/Region.html">Region</A>&nbsp;invalidRgn)
                     throws <A HREF="../../../quicktime/QTException.html">QTException</A></PRE>
<DL>
<DD>This method can be called by an application to have the QTImageProducer to update the pixel
 data for each of the registered ImageConsumers when the source QTDrawable object has drawn.
 Thus an application can either explicitly draw the QTDrawable source itself then call this method
 or can receive notification by the QTDrawable source when it has drawn, and use this method to
 update the registered ImageConsumers.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>invalidRgn</CODE> - enter null to copy all pixels, or specify a region that specifies the changed pixel data,
 which can econimize the copying of the pixel data to only those areas that have changed.</DL>
</DD>
</DL>
<HR>

<A NAME="setRedrawing(boolean)"><!-- --></A><H3>
setRedrawing</H3>
<PRE>
public void <B>setRedrawing</B>(boolean&nbsp;redrawFlag)</PRE>
<DL>
<DD>If true then the redraw method of the object will fetch new image data
 from its image source.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="../../../quicktime/app/image/Redrawable.html#setRedrawing(boolean)">setRedrawing</A></CODE> in interface <CODE><A HREF="../../../quicktime/app/image/Redrawable.html">Redrawable</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>redrawFlag</CODE> - boolean determining whether the current image is redrawn (false)
 of fresh or updated image data is first retrieved (true).</DL>
</DD>
</DL>
<HR>

<A NAME="isRedrawing()"><!-- --></A><H3>
isRedrawing</H3>
<PRE>
public boolean <B>isRedrawing</B>()</PRE>
<DL>
<DD>Returns true if the image data may be altered or different upon different calls
 of the redraw method of the QTDrawable interface<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="../../../quicktime/app/image/Redrawable.html#isRedrawing()">isRedrawing</A></CODE> in interface <CODE><A HREF="../../../quicktime/app/image/Redrawable.html">Redrawable</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="getSize()"><!-- --></A><H3>
getSize</H3>
<PRE>
public java.awt.Dimension <B>getSize</B>()</PRE>
<DL>
<DD>This returns the rendered size of the qtSource pixel data as specified in the constructor.<DD><DL>
</DL>
</DD>
</DL>
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