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public class MemoryImageSource extends Object implements ImageProducer
This class is an implementation of the ImageProducer interface which uses an array to produce pixel values for an Image. Here is an example which calculates a 100x100 image representing a fade from black to blue along the X axis and a fade from black to red along the Y axis:
int w = 100; int h = 100; int pix[] = new int[w * h]; int index = 0; for (int y = 0; y < h; y++) { int red = (y * 255) / (h - 1); for (int x = 0; x < w; x++) { int blue = (x * 255) / (w - 1); pix[index++] = (255 << 24) | (red << 16) | blue; } } Image img = createImage(new MemoryImageSource(w, h, pix, 0, w));The MemoryImageSource is also capable of managing a memory image which varies over time to allow animation or custom rendering. Here is an example showing how to set up the animation source and signal changes in the data (adapted from the MemoryAnimationSourceDemo by Garth Dickie):
int pixels[]; MemoryImageSource source; public void init() { int width = 50; int height = 50; int size = width * height; pixels = new int[size]; int value = getBackground().getRGB(); for (int i = 0; i < size; i++) { pixels[i] = value; } source = new MemoryImageSource(width, height, pixels, 0, width); source.setAnimated(true); image = createImage(source); } public void run() { Thread me = Thread.currentThread( ); me.setPriority(Thread.MIN_PRIORITY); while (true) { try { thread.sleep(10); } catch( InterruptedException e ) { return; } // Modify the values in the pixels array at (x, y, w, h) // Send the new data to the interested ImageConsumers source.newPixels(x, y, w, h); } }
Constructor Summary | |
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MemoryImageSource(int w, int h, ColorModel cm, byte[] pix, int off, int scan) Constructs an ImageProducer object which uses an array of bytes to produce data for an Image object. |
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MemoryImageSource(int w, int h, ColorModel cm, byte[] pix, int off, int scan, Hashtable props) Constructs an ImageProducer object which uses an array of bytes to produce data for an Image object. |
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MemoryImageSource(int w, int h, ColorModel cm, int[] pix, int off, int scan) Constructs an ImageProducer object which uses an array of integers to produce data for an Image object. |
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MemoryImageSource(int w, int h, ColorModel cm, int[] pix, int off, int scan, Hashtable props) Constructs an ImageProducer object which uses an array of integers to produce data for an Image object. |
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MemoryImageSource(int w, int h, int[] pix, int off, int scan) Constructs an ImageProducer object which uses an array of integers in the default RGB ColorModel to produce data for an Image object. |
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MemoryImageSource(int w, int h, int[] pix, int off, int scan, Hashtable props) Constructs an ImageProducer object which uses an array of integers in the default RGB ColorModel to produce data for an Image object. |
Method Summary | |
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void |
Adds an ImageConsumer to the list of consumers interested in data for this image. |
boolean |
Determines if an ImageConsumer is on the list of consumers currently interested in data for this image. |
void |
Sends a whole new buffer of pixels to any ImageConsumers that are currently interested in the data for this image and notify them that an animation frame is complete. |
void |
newPixels(byte[] newpix, ColorModel newmodel, int offset, int scansize) Changes to a new byte array to hold the pixels for this image. |
void |
newPixels(int x, int y, int w, int h) Sends a rectangular region of the buffer of pixels to any ImageConsumers that are currently interested in the data for this image and notify them that an animation frame is complete. |
void |
newPixels(int x, int y, int w, int h, boolean framenotify) Sends a rectangular region of the buffer of pixels to any ImageConsumers that are currently interested in the data for this image. |
void |
newPixels(int[] newpix, ColorModel newmodel, int offset, int scansize) Changes to a new int array to hold the pixels for this image. |
void |
Removes an ImageConsumer from the list of consumers interested in data for this image. |
void |
Requests that a given ImageConsumer have the image data delivered one more time in top-down, left-right order. |
void |
setAnimated(boolean animated) Changes this memory image into a multi-frame animation or a single-frame static image depending on the animated parameter. |
void |
setFullBufferUpdates(boolean fullbuffers) Specifies whether this animated memory image should always be updated by sending the complete buffer of pixels whenever there is a change. |
void |
Adds an ImageConsumer to the list of consumers interested in data for this image and immediately starts delivery of the image data through the ImageConsumer interface. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public MemoryImageSource(int w, int h, ColorModel cm, byte[] pix, int off, int scan)
w
- the width of the rectangle of pixelsh
- the height of the rectangle of pixelscm
- the specified ColorModel
pix
- an array of pixelsoff
- the offset into the array of where to store the
first pixelscan
- the distance from one row of pixels to the next in
the arraypublic MemoryImageSource(int w, int h, ColorModel cm, byte[] pix, int off, int scan, Hashtable props)
w
- the width of the rectangle of pixelsh
- the height of the rectangle of pixelscm
- the specified ColorModel
pix
- an array of pixelsoff
- the offset into the array of where to store the
first pixelscan
- the distance from one row of pixels to the next in
the arrayprops
- a list of properties that the ImageProducer
uses to process an imagepublic MemoryImageSource(int w, int h, ColorModel cm, int[] pix, int off, int scan)
w
- the width of the rectangle of pixelsh
- the height of the rectangle of pixelscm
- the specified ColorModel
pix
- an array of pixelsoff
- the offset into the array of where to store the
first pixelscan
- the distance from one row of pixels to the next in
the arraypublic MemoryImageSource(int w, int h, ColorModel cm, int[] pix, int off, int scan, Hashtable props)
w
- the width of the rectangle of pixelsh
- the height of the rectangle of pixelscm
- the specified ColorModel
pix
- an array of pixelsoff
- the offset into the array of where to store the
first pixelscan
- the distance from one row of pixels to the next in
the arrayprops
- a list of properties that the ImageProducer
uses to process an imagepublic MemoryImageSource(int w, int h, int[] pix, int off, int scan)
w
- the width of the rectangle of pixelsh
- the height of the rectangle of pixelspix
- an array of pixelsoff
- the offset into the array of where to store the
first pixelscan
- the distance from one row of pixels to the next in
the arraypublic MemoryImageSource(int w, int h, int[] pix, int off, int scan, Hashtable props)
w
- the width of the rectangle of pixelsh
- the height of the rectangle of pixelspix
- an array of pixelsoff
- the offset into the array of where to store the
first pixelscan
- the distance from one row of pixels to the next in
the arrayprops
- a list of properties that the ImageProducer
uses to process an imageMethod Detail |
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public synchronized void addConsumer(ImageConsumer ic)
ic
- the specified ImageConsumer
public synchronized boolean isConsumer(ImageConsumer ic)
ic
- the specified ImageConsumer
true
if the ImageConsumer
is on the list; false
otherwise.public void newPixels()
public synchronized void newPixels(byte[] newpix, ColorModel newmodel, int offset, int scansize)
newpix
- the new pixel arraynewmodel
- the specified ColorModel
offset
- the offset into the arrayscansize
- the distance from one row of pixels to the next in
the arraypublic synchronized void newPixels(int x, int y, int w, int h)
x
- the x coordinate of the upper left corner of the rectangle
of pixels to be senty
- the y coordinate of the upper left corner of the rectangle
of pixels to be sentw
- the width of the rectangle of pixels to be senth
- the height of the rectangle of pixels to be sentpublic synchronized void newPixels(int x, int y, int w, int h, boolean framenotify)
x
- the x coordinate of the upper left corner of the rectangle
of pixels to be senty
- the y coordinate of the upper left corner of the rectangle
of pixels to be sentw
- the width of the rectangle of pixels to be senth
- the height of the rectangle of pixels to be sentframenotify
- true
if the consumers should be sent a
{@link ImageConsumer#SINGLEFRAMEDONE SINGLEFRAMEDONE} notificationpublic synchronized void newPixels(int[] newpix, ColorModel newmodel, int offset, int scansize)
newpix
- the new pixel arraynewmodel
- the specified ColorModel
offset
- the offset into the arrayscansize
- the distance from one row of pixels to the next in
the arraypublic synchronized void removeConsumer(ImageConsumer ic)
ic
- the specified ImageConsumer
public void requestTopDownLeftRightResend(ImageConsumer ic)
ic
- the specified ImageConsumer
public synchronized void setAnimated(boolean animated)
This method should be called immediately after the MemoryImageSource is constructed and before an image is created with it to ensure that all ImageConsumers will receive the correct multi-frame data. If an ImageConsumer is added to this ImageProducer before this flag is set then that ImageConsumer will see only a snapshot of the pixel data that was available when it connected.
animated
- true
if the image is a
multi-frame animationpublic synchronized void setFullBufferUpdates(boolean fullbuffers)
This method should be called immediately after the MemoryImageSource is constructed and before an image is created with it to ensure that all ImageConsumers will receive the correct pixel delivery hints.
fullbuffers
- true
if the complete pixel
buffer should always
be sentpublic void startProduction(ImageConsumer ic)
ic
- the specified ImageConsumer
image data through the ImageConsumer interface.
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