CropImageFilter
Class CropImageFilter
- java.lang.Object
-
- java.awt.image.ImageFilter
-
- java.awt.image.CropImageFilter
- All Implemented Interfaces:
- ImageConsumer, Cloneable
public class CropImageFilter extends ImageFilter
An ImageFilter class for cropping images. This class extends the basic ImageFilter Class to extract a given rectangular region of an existing Image and provide a source for a new image containing just the extracted region. It is meant to be used in conjunction with a FilteredImageSource object to produce cropped versions of existing images.
- See Also:
-
FilteredImageSource
,ImageFilter
Fields
Fields inherited from class java.awt.image.ImageFilter
consumer
Fields inherited from interface java.awt.image.ImageConsumer
COMPLETESCANLINES, IMAGEABORTED, IMAGEERROR, RANDOMPIXELORDER, SINGLEFRAME, SINGLEFRAMEDONE, SINGLEPASS, STATICIMAGEDONE, TOPDOWNLEFTRIGHT
Constructors
CropImageFilter
public CropImageFilter(int x, int y, int w, int h)
Constructs a CropImageFilter that extracts the absolute rectangular region of pixels from its source Image as specified by the x, y, w, and h parameters.
- Parameters:
-
x
- the x location of the top of the rectangle to be extracted -
y
- the y location of the top of the rectangle to be extracted -
w
- the width of the rectangle to be extracted -
h
- the height of the rectangle to be extracted
Methods
setProperties
public void setProperties(Hashtable<?,?> props)
Passes along the properties from the source object after adding a property indicating the cropped region. This method invokes super.setProperties
, which might result in additional properties being added.
Note: This method is intended to be called by the ImageProducer
of the Image
whose pixels are being filtered. Developers using this class to filter pixels from an image should avoid calling this method directly since that operation could interfere with the filtering operation.
- Specified by:
-
setProperties
in interfaceImageConsumer
- Overrides:
-
setProperties
in classImageFilter
- Parameters:
-
props
- the properties from the source object
setDimensions
public void setDimensions(int w, int h)
Override the source image's dimensions and pass the dimensions of the rectangular cropped region to the ImageConsumer.
Note: This method is intended to be called by the ImageProducer
of the Image
whose pixels are being filtered. Developers using this class to filter pixels from an image should avoid calling this method directly since that operation could interfere with the filtering operation.
- Specified by:
-
setDimensions
in interfaceImageConsumer
- Overrides:
-
setDimensions
in classImageFilter
- Parameters:
-
w
- the width of the source image -
h
- the height of the source image - See Also:
ImageConsumer
setPixels
public void setPixels(int x, int y, int w, int h, ColorModel model, byte[] pixels, int off, int scansize)
Determine whether the delivered byte pixels intersect the region to be extracted and passes through only that subset of pixels that appear in the output region.
Note: This method is intended to be called by the ImageProducer
of the Image
whose pixels are being filtered. Developers using this class to filter pixels from an image should avoid calling this method directly since that operation could interfere with the filtering operation.
- Specified by:
-
setPixels
in interfaceImageConsumer
- Overrides:
-
setPixels
in classImageFilter
- Parameters:
-
x
- the X coordinate of the upper-left corner of the area of pixels to be set -
y
- the Y coordinate of the upper-left corner of the area of pixels to be set -
w
- the width of the area of pixels -
h
- the height of the area of pixels -
model
- the specifiedColorModel
-
pixels
- the array of pixels -
off
- the offset into thepixels
array -
scansize
- the distance from one row of pixels to the next in thepixels
array - See Also:
ImageConsumer.setPixels(int, int, int, int, java.awt.image.ColorModel, byte[], int, int)
setPixels
public void setPixels(int x, int y, int w, int h, ColorModel model, int[] pixels, int off, int scansize)
Determine if the delivered int pixels intersect the region to be extracted and pass through only that subset of pixels that appear in the output region.
Note: This method is intended to be called by the ImageProducer
of the Image
whose pixels are being filtered. Developers using this class to filter pixels from an image should avoid calling this method directly since that operation could interfere with the filtering operation.
- Specified by:
-
setPixels
in interfaceImageConsumer
- Overrides:
-
setPixels
in classImageFilter
- Parameters:
-
x
- the X coordinate of the upper-left corner of the area of pixels to be set -
y
- the Y coordinate of the upper-left corner of the area of pixels to be set -
w
- the width of the area of pixels -
h
- the height of the area of pixels -
model
- the specifiedColorModel
-
pixels
- the array of pixels -
off
- the offset into thepixels
array -
scansize
- the distance from one row of pixels to the next in thepixels
array - See Also:
ImageConsumer.setPixels(int, int, int, int, java.awt.image.ColorModel, byte[], int, int)
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