ImageConsumer
, Cloneable
GrayFilter
public abstract class RGBImageFilter extends ImageFilter
class RedBlueSwapFilter extends RGBImageFilter {
public RedBlueSwapFilter() {
// The filter's operation does not depend on the
// pixel's location, so IndexColorModels can be
// filtered directly.
canFilterIndexColorModel = true;
}
public int filterRGB(int x, int y, int rgb) {
return ((rgb & 0xff00ff00)
| ((rgb & 0xff0000) >> 16)
| ((rgb & 0xff) << 16));
}
}
Modifier and Type | Field | Description |
---|---|---|
protected boolean |
canFilterIndexColorModel |
This boolean indicates whether or not it is acceptable to apply the color filtering of the filterRGB method to the color table entries of an IndexColorModel object in lieu of pixel by pixel filtering. |
protected ColorModel |
newmodel |
The ColorModel with which to replace origmodel when the user calls substituteColorModel . |
protected ColorModel |
origmodel |
consumer
COMPLETESCANLINES, IMAGEABORTED, IMAGEERROR, RANDOMPIXELORDER, SINGLEFRAME, SINGLEFRAMEDONE, SINGLEPASS, STATICIMAGEDONE, TOPDOWNLEFTRIGHT
Modifier | Constructor | Description |
---|---|---|
protected |
Constructor for subclasses to call. |
Modifier and Type | Method | Description |
---|---|---|
IndexColorModel |
filterIndexColorModel |
Filters an IndexColorModel object by running each entry in its color tables through the filterRGB function that RGBImageFilter subclasses must provide. |
abstract int |
filterRGB |
Subclasses must specify a method to convert a single input pixel in the default RGB ColorModel to a single output pixel. |
void |
filterRGBPixels |
Filters a buffer of pixels in the default RGB ColorModel by passing them one by one through the filterRGB method. |
void |
setColorModel |
If the ColorModel is an IndexColorModel and the subclass has set the canFilterIndexColorModel flag to true, we substitute a filtered version of the color model here and wherever that original ColorModel object appears in the setPixels methods. |
void |
setPixels |
If the ColorModel object is the same one that has already been converted, then simply passes the pixels through with the converted ColorModel. |
void |
setPixels |
If the ColorModel object is the same one that has already been converted, then simply passes the pixels through with the converted ColorModel, otherwise converts the buffer of integer pixels to the default RGB ColorModel and passes the converted buffer to the filterRGBPixels method to be converted one by one. |
void |
substituteColorModel |
Registers two ColorModel objects for substitution. |
clone, getFilterInstance, imageComplete, resendTopDownLeftRight, setDimensions, setHints, setProperties
protected ColorModel origmodel
protected ColorModel newmodel
ColorModel
with which to replace origmodel
when the user calls substituteColorModel
.protected boolean canFilterIndexColorModel
protected RGBImageFilter()
public void setColorModel(ColorModel model)
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.
setColorModel
in interface ImageConsumer
setColorModel
in class ImageFilter
model
- the specified ColorModel
public void substituteColorModel(ColorModel oldcm, ColorModel newcm)
oldcm
- the ColorModel object to be replaced on the flynewcm
- the ColorModel object to replace oldcm on the flypublic IndexColorModel filterIndexColorModel(IndexColorModel icm)
icm
- the IndexColorModel object to be filteredNullPointerException
- if icm
is nullpublic void filterRGBPixels(int x, int y, int w, int h, int[] pixels, int off, int scansize)
x
- the X coordinate of the upper-left corner of the region of pixelsy
- the Y coordinate of the upper-left corner of the region of pixelsw
- the width of the region of pixelsh
- the height of the region of pixelspixels
- the array of pixelsoff
- the offset into the pixels
arrayscansize
- the distance from one row of pixels to the next in the arraypublic void setPixels(int x, int y, int w, int h, ColorModel model, byte[] pixels, int off, int scansize)
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.
setPixels
in interface ImageConsumer
setPixels
in class ImageFilter
x
- the X coordinate of the upper-left corner of the area of pixels to be sety
- the Y coordinate of the upper-left corner of the area of pixels to be setw
- the width of the area of pixelsh
- the height of the area of pixelsmodel
- the specified ColorModel
pixels
- the array of pixelsoff
- the offset into the pixels
arrayscansize
- the distance from one row of pixels to the next in the pixels
arraypublic void setPixels(int x, int y, int w, int h, ColorModel model, int[] pixels, int off, int scansize)
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.
setPixels
in interface ImageConsumer
setPixels
in class ImageFilter
x
- the X coordinate of the upper-left corner of the area of pixels to be sety
- the Y coordinate of the upper-left corner of the area of pixels to be setw
- the width of the area of pixelsh
- the height of the area of pixelsmodel
- the specified ColorModel
pixels
- the array of pixelsoff
- the offset into the pixels
arrayscansize
- the distance from one row of pixels to the next in the pixels
arraypublic abstract int filterRGB(int x, int y, int rgb)
x
- the X coordinate of the pixely
- the Y coordinate of the pixelrgb
- the integer pixel representation in the default RGB color model
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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/java/awt/image/RGBImageFilter.html