Package net.sourceforge.jiu.data
Class MemoryByteChannelImage
java.lang.Object
net.sourceforge.jiu.data.MemoryByteChannelImage
- All Implemented Interfaces:
ByteChannelImage
,IntegerImage
,PixelImage
- Direct Known Subclasses:
MemoryGray8Image
,MemoryPaletted8Image
,MemoryRGB24Image
An implementation of
ByteChannelImage
that stores image channels as
byte[]
arrays in memory.
An image can have an arbitrary number of channels.
This class is abstract because it is merely a data container.
It takes a subclass like MemoryGray8Image
to give meaning to the values.
- Author:
- Marco Schmidt
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate final byte[][]
private final byte[]
private final int
private final int
private final int
private final int
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Constructor Summary
ConstructorsConstructorDescriptionMemoryByteChannelImage
(int numChannels, int width, int height) Create an image of byte channels. -
Method Summary
Modifier and TypeMethodDescriptionprotected void
checkPositionAndNumber
(int channel, int x, int y, int w, int h) Throws an exception if the arguments do not form a valid horizontal sequence of samples.void
clear
(byte newValue) Sets all samples of the first channel to the argument byte value.void
clear
(int newValue) Sets all samples in the first channel to the argument value.void
clear
(int channelIndex, byte newValue) Sets all samples of one channel to a new value.void
clear
(int channelIndex, int newValue) Sets all samples of thechannelIndex
'th channel tonewValue
.abstract PixelImage
createCompatibleImage
(int width, int height) Creates an instance of the same class as this one, with width and height given by the arguments.Creates an new image object that will be of the same type as this one, with the same image data, using entirely new resources.long
Returns the number of bytes that were dynamically allocated for this image object.int
Returns the number of bits per pixel of this image.byte
getByteSample
(int x, int y) Returns a single byte sample from the first channel and the specified position.byte
getByteSample
(int channel, int x, int y) Returns a single byte sample from the image.void
getByteSamples
(int channel, int x, int y, int w, int h, byte[] dest, int destOffset) Copies samples from this image to a byte array.final int
Returns the vertical resolution of the image in pixels.int
getMaxSample
(int channel) Returns the maximum value for one of the image's channels.int
Returns the number of channels in this image.final int
getSample
(int x, int y) Returns one sample of the first channel (index 0).final int
getSample
(int channel, int x, int y) Returns one sample, specified by its channel index and location.void
getSamples
(int channel, int x, int y, int w, int h, int[] dest, int destOffs) Copies a number of samples from this image to anint[]
object.final int
getWidth()
Returns the horizontal resolution of the image in pixels.final void
putByteSample
(int x, int y, byte newValue) Sets one byte sample in the first channel (index0
) to a new value.final void
putByteSample
(int channel, int x, int y, byte newValue) Sets one byte sample in one channel to a new value.void
putByteSamples
(int channel, int x, int y, int w, int h, byte[] src, int srcOffset) Copies a number of samples from the argument array to this image.final void
putSample
(int x, int y, int newValue) This method sets one sample of the first channel (index 0) to a new value.final void
putSample
(int channel, int x, int y, int newValue) This method sets one sample to a new value.void
putSamples
(int channel, int x, int y, int w, int h, int[] src, int srcOffs) Copies a number of samples from anint[]
array to this image.Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface net.sourceforge.jiu.data.PixelImage
getImageType
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Field Details
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data
private final byte[][] data -
firstChannel
private final byte[] firstChannel -
numChannels
private final int numChannels -
width
private final int width -
height
private final int height -
numPixels
private final int numPixels
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Constructor Details
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MemoryByteChannelImage
public MemoryByteChannelImage(int numChannels, int width, int height) Create an image of byte channels. Image data will be completely in memory, so memory requirements arewidth * height * numChannels
bytes. Note that the data will not be initialized, so you should not assume anything about its content.- Parameters:
numChannels
- the number of channels in this image, must be non-zero and positivewidth
- the horizontal resolution, must be non-zero and positiveheight
- the vertical resolution, must be non-zero and positive
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Method Details
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checkPositionAndNumber
protected void checkPositionAndNumber(int channel, int x, int y, int w, int h) Throws an exception if the arguments do not form a valid horizontal sequence of samples. To be valid, all of the following requirements must be met: -
clear
public void clear(byte newValue) Description copied from interface:ByteChannelImage
Sets all samples of the first channel to the argument byte value. Equal toclear(0, newValue);
.- Specified by:
clear
in interfaceByteChannelImage
- Parameters:
newValue
- all samples in the first channel are set to this value- See Also:
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clear
public void clear(int channelIndex, byte newValue) Description copied from interface:ByteChannelImage
Sets all samples of one channel to a new value.- Specified by:
clear
in interfaceByteChannelImage
- Parameters:
channelIndex
- zero-based index of the channel to be cleared (must be smaller thanPixelImage.getNumChannels()
newValue
- all samples in the channel will be set to this value
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clear
public void clear(int newValue) Description copied from interface:IntegerImage
Sets all samples in the first channel to the argument value. Equal toclear(0, newValue);
:- Specified by:
clear
in interfaceIntegerImage
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clear
public void clear(int channelIndex, int newValue) Description copied from interface:IntegerImage
Sets all samples of thechannelIndex
'th channel tonewValue
.- Specified by:
clear
in interfaceIntegerImage
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createCompatibleImage
Description copied from interface:PixelImage
Creates an instance of the same class as this one, with width and height given by the arguments.- Specified by:
createCompatibleImage
in interfacePixelImage
- Parameters:
width
- the horizontal resolution of the new imageheight
- the vertical resolution of the new image- Returns:
- the new image
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createCopy
Description copied from interface:PixelImage
Creates an new image object that will be of the same type as this one, with the same image data, using entirely new resources.- Specified by:
createCopy
in interfacePixelImage
- Returns:
- the new image object
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getAllocatedMemory
public long getAllocatedMemory()Description copied from interface:PixelImage
Returns the number of bytes that were dynamically allocated for this image object.- Specified by:
getAllocatedMemory
in interfacePixelImage
- Returns:
- allocated memory in bytes
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getBitsPerPixel
public int getBitsPerPixel()Description copied from interface:PixelImage
Returns the number of bits per pixel of this image. That is the number of bits per sample for all channels of this image. Does not include any transparency channels.- Specified by:
getBitsPerPixel
in interfacePixelImage
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getByteSample
public byte getByteSample(int channel, int x, int y) Description copied from interface:ByteChannelImage
Returns a single byte sample from the image. When possible, try copying several samples at a time for higher speed (ByteChannelImage.getByteSamples(int, int, int, int, int, byte[], int)
).- Specified by:
getByteSample
in interfaceByteChannelImage
- Parameters:
channel
- the number of the channel of the sample; must be from0
toPixelImage.getNumChannels()
- 1x
- the column of the sample to be returned; must be from0
toPixelImage.getWidth()
- 1y
- the row of the sample; must be from0
toPixelImage.getHeight()
- 1- Returns:
- the sample, a single byte value
- See Also:
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getByteSample
public byte getByteSample(int x, int y) Description copied from interface:ByteChannelImage
Returns a single byte sample from the first channel and the specified position. A call to this method is the same asgetByteSample(0, x, y)
.- Specified by:
getByteSample
in interfaceByteChannelImage
- Parameters:
x
- horizontal position of the sample to be returned (must be between0
andPixelImage.getWidth()
- 1
y
- vertical position of the sample to be returned (must be between0
andPixelImage.getHeight()
- 1
- Returns:
- the requested byte sample
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getByteSamples
public void getByteSamples(int channel, int x, int y, int w, int h, byte[] dest, int destOffset) Description copied from interface:ByteChannelImage
Copies samples from this image to a byte array. Copiesnum
samples in rowy
of channelchannel
, starting at horizontal offsetx
. Data will be written to thedest
array, starting at offsetdestOffset
. Data will be copied from one row only, so a maximum ofgetWidth()
samples can be copied with a call to this method.- Specified by:
getByteSamples
in interfaceByteChannelImage
- Parameters:
channel
- the index of the channel to be copied from; must be from0
togetNumChannels() - 1
x
- the horizontal offset where copying will start; must be from0
togetWidth() - 1
y
- the row from which will be copied; must be from0
togetHeight() - 1
w
- the number of columns to be copiedh
- the number of rows to be copieddest
- the array where the data will be copied to; must have a length of at leastdestOffset + num
destOffset
- the offset intodest
where this method will start copying data
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getHeight
public final int getHeight()Description copied from interface:PixelImage
Returns the vertical resolution of the image in pixels. Must be one or larger.- Specified by:
getHeight
in interfacePixelImage
- Returns:
- height in pixels
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getMaxSample
public int getMaxSample(int channel) Description copied from interface:IntegerImage
Returns the maximum value for one of the image's channels. The minimum value is always0
.- Specified by:
getMaxSample
in interfaceIntegerImage
- Parameters:
channel
- zero-based index of the channel, from0
toPixelImage.getNumChannels()
- 1
- Returns:
- maximum allowed sample value
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getNumChannels
public int getNumChannels()Description copied from interface:PixelImage
Returns the number of channels in this image. Must be one or larger.- Specified by:
getNumChannels
in interfacePixelImage
- Returns:
- the number of channels
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getSample
public final int getSample(int x, int y) Description copied from interface:IntegerImage
Returns one sample of the first channel (index 0). A call to this method must have the same result as the callgetSample(0, x, y);
.- Specified by:
getSample
in interfaceIntegerImage
- Parameters:
x
- the horizontal position of the sample, from0
toPixelImage.getWidth()
- 1
y
- the vertical position of the sample, from0
toPixelImage.getHeight()
- 1
- Returns:
- the desired sample
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getSample
public final int getSample(int channel, int x, int y) Description copied from interface:IntegerImage
Returns one sample, specified by its channel index and location.- Specified by:
getSample
in interfaceIntegerImage
- Parameters:
channel
- the number of the channel, from0
toPixelImage.getNumChannels()
- 1
x
- the horizontal position of the sample, from0
toPixelImage.getWidth()
- 1
y
- the vertical position of the sample, from0
toPixelImage.getHeight()
- 1
- Returns:
- the desired sample
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getSamples
public void getSamples(int channel, int x, int y, int w, int h, int[] dest, int destOffs) Description copied from interface:IntegerImage
Copies a number of samples from this image to anint[]
object. A rectangular part of one channel is copied. The channel index is given by - the upper left corner of that rectangle is given by the point x / y. Width and height of that rectangle are given by w and h. Each sample will be stored as oneint
value dest, starting at index destOffs.- Specified by:
getSamples
in interfaceIntegerImage
- Parameters:
channel
- zero-based index of the channel from which data is to be copied (valid values: 0 toPixelImage.getNumChannels()
- 1)x
- horizontal position of upper left corner of the rectangle to be copiedy
- vertical position of upper left corner of the rectangle to be copiedw
- width of rectangle to be copiedh
- height of rectangle to be copieddest
- int array to which the samples will be copieddestOffs
- int index into the dest array for the position to which the samples will be copied
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getWidth
public final int getWidth()Description copied from interface:PixelImage
Returns the horizontal resolution of the image in pixels. Must be one or larger.- Specified by:
getWidth
in interfacePixelImage
- Returns:
- width in pixels
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putByteSample
public final void putByteSample(int channel, int x, int y, byte newValue) Description copied from interface:ByteChannelImage
Sets one byte sample in one channel to a new value.- Specified by:
putByteSample
in interfaceByteChannelImage
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putByteSample
public final void putByteSample(int x, int y, byte newValue) Description copied from interface:ByteChannelImage
Sets one byte sample in the first channel (index0
) to a new value. Result is equal toputByteSample(0, x, y, newValue);
.- Specified by:
putByteSample
in interfaceByteChannelImage
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putByteSamples
public void putByteSamples(int channel, int x, int y, int w, int h, byte[] src, int srcOffset) Description copied from interface:ByteChannelImage
Copies a number of samples from the argument array to this image.- Specified by:
putByteSamples
in interfaceByteChannelImage
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putSamples
public void putSamples(int channel, int x, int y, int w, int h, int[] src, int srcOffs) Description copied from interface:IntegerImage
Copies a number of samples from anint[]
array to this image. A rectangular part of one channel is copied - the upper left corner of that rectangle is given by the point x / y. Width and height of that rectangle are given by w and h. Each sample will be stored as oneint
value src, starting at index srcOffset.- Specified by:
putSamples
in interfaceIntegerImage
- Parameters:
channel
- int (from 0 to getNumChannels() - 1) to indicate the channel to which data is copiedx
- horizontal position of upper left corner of the rectangle to be copiedy
- vertical position of upper left corner of the rectangle to be copiedw
- width of rectangle to be copiedh
- height of rectangle to be copiedsrc
- int array from which the samples will be copiedsrcOffs
- int index into the src array for the position from which the samples will be copied
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putSample
public final void putSample(int x, int y, int newValue) Description copied from interface:IntegerImage
This method sets one sample of the first channel (index 0) to a new value. This call must have the same result as the callputSample(0, x, y)
. The sample location is given by the spatial coordinates, x and y.- Specified by:
putSample
in interfaceIntegerImage
- Parameters:
x
- the horizontal position of the sample, from0
toPixelImage.getWidth()
- 1
y
- the vertical position of the sample, from0
toPixelImage.getHeight()
- 1
newValue
- the new value of the sample
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putSample
public final void putSample(int channel, int x, int y, int newValue) Description copied from interface:IntegerImage
This method sets one sample to a new value. The sample location is given by the channel index and the spatial coordinates, x and y.- Specified by:
putSample
in interfaceIntegerImage
- Parameters:
channel
- the number of the channel, from0
toPixelImage.getNumChannels()
- 1
x
- the horizontal position of the sample, from0
toPixelImage.getWidth()
- 1
y
- the vertical position of the sample, from0
toPixelImage.getHeight()
- 1
newValue
- the new value of the sample
-