java.awt.image.BufferedImage

All Implemented Interfaces:: RenderedImage, WritableRenderedImage, Transparency

public class BufferedImage
extends Image
implements WritableRenderedImage, Transparency

The BufferedImage subclass describes an Image with an accessible buffer of image data. A BufferedImage is comprised of a ColorModel and a Raster of image data. The number and types of bands in the SampleModel of the Raster must match the number and types required by the ColorModel to represent its color and alpha components. All BufferedImage objects have an upper left corner coordinate of (0, 0). Any Raster used to construct a BufferedImage must therefore have minX=0 and minY=0.

This class relies on the data fetching and setting methods of Raster, and on the color characterization methods of ColorModel.

See Also:: ColorModel, Raster, WritableRaster

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`TYPE_3BYTE_BGR`	Represents an image with 8-bit RGB color components, corresponding to a Windows-style BGR color model) with the colors Blue, Green, and Red stored in 3 bytes.
`static int`	`TYPE_4BYTE_ABGR`	Represents an image with 8-bit RGBA color components with the colors Blue, Green, and Red stored in 3 bytes and 1 byte of alpha.
`static int`	`TYPE_4BYTE_ABGR_PRE`	Represents an image with 8-bit RGBA color components with the colors Blue, Green, and Red stored in 3 bytes and 1 byte of alpha.
`static int`	`TYPE_BYTE_BINARY`	Represents an opaque byte-packed 1, 2, or 4 bit image.
`static int`	`TYPE_BYTE_GRAY`	Represents a unsigned byte grayscale image, non-indexed.
`static int`	`TYPE_BYTE_INDEXED`	Represents an indexed byte image.
`static int`	`TYPE_CUSTOM`	Image type is not recognized so it must be a customized image.
`static int`	`TYPE_INT_ARGB`	Represents an image with 8-bit RGBA color components packed into integer pixels.
`static int`	`TYPE_INT_ARGB_PRE`	Represents an image with 8-bit RGBA color components packed into integer pixels.
`static int`	`TYPE_INT_BGR`	Represents an image with 8-bit RGB color components, corresponding to a Windows- or Solaris- style BGR color model, with the colors Blue, Green, and Red packed into integer pixels.
`static int`	`TYPE_INT_RGB`	Represents an image with 8-bit RGB color components packed into integer pixels.
`static int`	`TYPE_USHORT_555_RGB`	Represents an image with 5-5-5 RGB color components (5-bits red, 5-bits green, 5-bits blue) with no alpha.
`static int`	`TYPE_USHORT_565_RGB`	Represents an image with 5-6-5 RGB color components (5-bits red, 6-bits green, 5-bits blue) with no alpha.
`static int`	`TYPE_USHORT_GRAY`	Represents an unsigned short grayscale image, non-indexed).

Fields declared in class java.awt.Image

accelerationPriority, SCALE_AREA_AVERAGING, SCALE_DEFAULT, SCALE_FAST, SCALE_REPLICATE, SCALE_SMOOTH, UndefinedProperty

Fields declared in interface java.awt.Transparency

BITMASK, OPAQUE, TRANSLUCENT

Constructor Summary

Constructors
Constructor	Description
`BufferedImage(int width, int height, int imageType)`	Constructs a `BufferedImage` of one of the predefined image types.
`BufferedImage(int width, int height, int imageType, IndexColorModel cm)`	Constructs a `BufferedImage` of one of the predefined image types: TYPE_BYTE_BINARY or TYPE_BYTE_INDEXED.
`BufferedImage(ColorModel cm, WritableRaster raster, boolean isRasterPremultiplied, Hashtable<?,?> properties)`	Constructs a new `BufferedImage` with a specified `ColorModel` and `Raster`.

Method Summary

Modifier and Type	Method	Description
`void`	`addTileObserver(TileObserver to)`	Adds a tile observer.
`void`	`coerceData(boolean isAlphaPremultiplied)`	Forces the data to match the state specified in the `isAlphaPremultiplied` variable.
`WritableRaster`	`copyData(WritableRaster outRaster)`	Computes an arbitrary rectangular region of the `BufferedImage` and copies it into a specified `WritableRaster`.
`Graphics2D`	`createGraphics()`	Creates a `Graphics2D`, which can be used to draw into this `BufferedImage`.
`WritableRaster`	`getAlphaRaster()`	Returns a `WritableRaster` representing the alpha channel for `BufferedImage` objects with `ColorModel` objects that support a separate spatial alpha channel, such as `ComponentColorModel` and `DirectColorModel`.
`ColorModel`	`getColorModel()`	Returns the `ColorModel`.
`Raster`	`getData()`	Returns the image as one large tile.
`Raster`	`getData(Rectangle rect)`	Computes and returns an arbitrary region of the `BufferedImage`.
`Graphics`	`getGraphics()`	This method returns a `Graphics2D`, but is here for backwards compatibility.
`int`	`getHeight()`	Returns the height of the `BufferedImage`.
`int`	`getHeight(ImageObserver observer)`	Returns the height of the `BufferedImage`.
`int`	`getMinTileX()`	Returns the minimum tile index in the x direction.
`int`	`getMinTileY()`	Returns the minimum tile index in the y direction.
`int`	`getMinX()`	Returns the minimum x coordinate of this `BufferedImage`.
`int`	`getMinY()`	Returns the minimum y coordinate of this `BufferedImage`.
`int`	`getNumXTiles()`	Returns the number of tiles in the x direction.
`int`	`getNumYTiles()`	Returns the number of tiles in the y direction.
`Object`	`getProperty(String name)`	Returns a property of the image by name.
`Object`	`getProperty(String name, ImageObserver observer)`	Returns a property of the image by name.
`String[]`	`getPropertyNames()`	Returns an array of names recognized by `getProperty(String)` or `null`, if no property names are recognized.
`WritableRaster`	`getRaster()`	Returns the `WritableRaster`.
`int`	`getRGB(int x, int y)`	Returns an integer pixel in the default RGB color model (TYPE_INT_ARGB) and default sRGB colorspace.
`int[]`	`getRGB(int startX, int startY, int w, int h, int[] rgbArray, int offset, int scansize)`	Returns an array of integer pixels in the default RGB color model (TYPE_INT_ARGB) and default sRGB color space, from a portion of the image data.
`SampleModel`	`getSampleModel()`	Returns the `SampleModel` associated with this `BufferedImage`.
`ImageProducer`	`getSource()`	Returns the object that produces the pixels for the image.
`Vector<RenderedImage>`	`getSources()`	Returns a `Vector` of `RenderedImage` objects that are the immediate sources, not the sources of these immediate sources, of image data for this `BufferedImage`.
`BufferedImage`	`getSubimage(int x, int y, int w, int h)`	Returns a subimage defined by a specified rectangular region.
`Raster`	`getTile(int tileX, int tileY)`	Returns tile (`tileX`, `tileY`).
`int`	`getTileGridXOffset()`	Returns the x offset of the tile grid relative to the origin, For example, the x coordinate of the location of tile (0, 0).
`int`	`getTileGridYOffset()`	Returns the y offset of the tile grid relative to the origin, For example, the y coordinate of the location of tile (0, 0).
`int`	`getTileHeight()`	Returns the tile height in pixels.
`int`	`getTileWidth()`	Returns the tile width in pixels.
`int`	`getTransparency()`	Returns the transparency.
`int`	`getType()`	Returns the image type.
`int`	`getWidth()`	Returns the width of the `BufferedImage`.
`int`	`getWidth(ImageObserver observer)`	Returns the width of the `BufferedImage`.
`WritableRaster`	`getWritableTile(int tileX, int tileY)`	Checks out a tile for writing.
`Point[]`	`getWritableTileIndices()`	Returns an array of `Point` objects indicating which tiles are checked out for writing.
`boolean`	`hasTileWriters()`	Returns whether or not any tile is checked out for writing.
`boolean`	`isAlphaPremultiplied()`	Returns whether or not the alpha has been premultiplied.
`boolean`	`isTileWritable(int tileX, int tileY)`	Returns whether or not a tile is currently checked out for writing.
`void`	`releaseWritableTile(int tileX, int tileY)`	Relinquishes permission to write to a tile.
`void`	`removeTileObserver(TileObserver to)`	Removes a tile observer.
`void`	`setData(Raster r)`	Sets a rectangular region of the image to the contents of the specified `Raster r`, which is assumed to be in the same coordinate space as the `BufferedImage`.
`void`	`setRGB(int x, int y, int rgb)`	Sets a pixel in this `BufferedImage` to the specified RGB value.
`void`	`setRGB(int startX, int startY, int w, int h, int[] rgbArray, int offset, int scansize)`	Sets an array of integer pixels in the default RGB color model (TYPE_INT_ARGB) and default sRGB color space, into a portion of the image data.
`String`	`toString()`	Returns a `String` representation of this `BufferedImage` object and its values.

Methods declared in class java.awt.Image

flush, getAccelerationPriority, getCapabilities, getScaledInstance, setAccelerationPriority

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details
- TYPE_CUSTOM
  
  public static final int TYPE_CUSTOM
  
  Image type is not recognized so it must be a customized image. This type is only used as a return value for the getType() method.
  
  See Also:
  
  Constant Field Values
- TYPE_INT_RGB
  
  public static final int TYPE_INT_RGB
  
  Represents an image with 8-bit RGB color components packed into integer pixels. The image has a DirectColorModel without alpha. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite documentation.
  
  See Also:
  
  Constant Field Values
- TYPE_INT_ARGB
  
  public static final int TYPE_INT_ARGB
  
  Represents an image with 8-bit RGBA color components packed into integer pixels. The image has a DirectColorModel with alpha. The color data in this image is considered not to be premultiplied with alpha. When this type is used as the imageType argument to a BufferedImage constructor, the created image is consistent with images created in the JDK1.1 and earlier releases.
  
  See Also:
  
  Constant Field Values
- TYPE_INT_ARGB_PRE
  
  public static final int TYPE_INT_ARGB_PRE
  
  Represents an image with 8-bit RGBA color components packed into integer pixels. The image has a DirectColorModel with alpha. The color data in this image is considered to be premultiplied with alpha.
  
  See Also:
  
  Constant Field Values
- TYPE_INT_BGR
  
  public static final int TYPE_INT_BGR
  
  Represents an image with 8-bit RGB color components, corresponding to a Windows- or Solaris- style BGR color model, with the colors Blue, Green, and Red packed into integer pixels. There is no alpha. The image has a DirectColorModel. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite documentation.
  
  See Also:
  
  Constant Field Values
- TYPE_3BYTE_BGR
  
  public static final int TYPE_3BYTE_BGR
  
  Represents an image with 8-bit RGB color components, corresponding to a Windows-style BGR color model) with the colors Blue, Green, and Red stored in 3 bytes. There is no alpha. The image has a ComponentColorModel. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite documentation.
  
  See Also:
  
  Constant Field Values
- TYPE_4BYTE_ABGR
  
  public static final int TYPE_4BYTE_ABGR
  
  Represents an image with 8-bit RGBA color components with the colors Blue, Green, and Red stored in 3 bytes and 1 byte of alpha. The image has a ComponentColorModel with alpha. The color data in this image is considered not to be premultiplied with alpha. The byte data is interleaved in a single byte array in the order A, B, G, R from lower to higher byte addresses within each pixel.
  
  See Also:
  
  Constant Field Values
- TYPE_4BYTE_ABGR_PRE
  
  public static final int TYPE_4BYTE_ABGR_PRE
  
  Represents an image with 8-bit RGBA color components with the colors Blue, Green, and Red stored in 3 bytes and 1 byte of alpha. The image has a ComponentColorModel with alpha. The color data in this image is considered to be premultiplied with alpha. The byte data is interleaved in a single byte array in the order A, B, G, R from lower to higher byte addresses within each pixel.
  
  See Also:
  
  Constant Field Values
- TYPE_USHORT_565_RGB
  
  public static final int TYPE_USHORT_565_RGB
  
  Represents an image with 5-6-5 RGB color components (5-bits red, 6-bits green, 5-bits blue) with no alpha. This image has a DirectColorModel. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite documentation.
  
  See Also:
  
  Constant Field Values
- TYPE_USHORT_555_RGB
  
  public static final int TYPE_USHORT_555_RGB
  
  Represents an image with 5-5-5 RGB color components (5-bits red, 5-bits green, 5-bits blue) with no alpha. This image has a DirectColorModel. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite documentation.
  
  See Also:
  
  Constant Field Values
- TYPE_BYTE_GRAY
  
  public static final int TYPE_BYTE_GRAY
  
  Represents a unsigned byte grayscale image, non-indexed. This image has a ComponentColorModel with a CS_GRAY ColorSpace. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite documentation.
  
  See Also:
  
  Constant Field Values
- TYPE_USHORT_GRAY
  
  public static final int TYPE_USHORT_GRAY
  
  Represents an unsigned short grayscale image, non-indexed). This image has a ComponentColorModel with a CS_GRAY ColorSpace. When data with non-opaque alpha is stored in an image of this type, the color data must be adjusted to a non-premultiplied form and the alpha discarded, as described in the AlphaComposite documentation.
  
  See Also:
  
  Constant Field Values
- TYPE_BYTE_BINARY
  
  public static final int TYPE_BYTE_BINARY
  
  Represents an opaque byte-packed 1, 2, or 4 bit image. The image has an IndexColorModel without alpha. When this type is used as the imageType argument to the BufferedImage constructor that takes an imageType argument but no ColorModel argument, a 1-bit image is created with an IndexColorModel with two colors in the default sRGB ColorSpace: {0, 0, 0} and {255, 255, 255}.
  Images with 2 or 4 bits per pixel may be constructed via the BufferedImage constructor that takes a ColorModel argument by supplying a ColorModel with an appropriate map size.
  Images with 8 bits per pixel should use the image types TYPE_BYTE_INDEXED or TYPE_BYTE_GRAY depending on their ColorModel.
  When color data is stored in an image of this type, the closest color in the colormap is determined by the IndexColorModel and the resulting index is stored. Approximation and loss of alpha or color components can result, depending on the colors in the IndexColorModel colormap.
  
  See Also:
  
  Constant Field Values
- TYPE_BYTE_INDEXED
  
  public static final int TYPE_BYTE_INDEXED
  
  Represents an indexed byte image. When this type is used as the imageType argument to the BufferedImage constructor that takes an imageType argument but no ColorModel argument, an IndexColorModel is created with a 256-color 6/6/6 color cube palette with the rest of the colors from 216-255 populated by grayscale values in the default sRGB ColorSpace.
  When color data is stored in an image of this type, the closest color in the colormap is determined by the IndexColorModel and the resulting index is stored. Approximation and loss of alpha or color components can result, depending on the colors in the IndexColorModel colormap.
  
  See Also:
  
  Constant Field Values
Constructor Details
- BufferedImage
  
  public BufferedImage(int width, int height, int imageType)
  
  Constructs a BufferedImage of one of the predefined image types. The ColorSpace for the image is the default sRGB space.
  
  Parameters:
  
  width - width of the created image
  
  height - height of the created image
  
  imageType - type of the created image
  
  See Also:
  
  ColorSpace, TYPE_INT_RGB, TYPE_INT_ARGB, TYPE_INT_ARGB_PRE, TYPE_INT_BGR, TYPE_3BYTE_BGR, TYPE_4BYTE_ABGR, TYPE_4BYTE_ABGR_PRE, TYPE_BYTE_GRAY, TYPE_USHORT_GRAY, TYPE_BYTE_BINARY, TYPE_BYTE_INDEXED, TYPE_USHORT_565_RGB, TYPE_USHORT_555_RGB
- BufferedImage
  
  public BufferedImage(int width, int height, int imageType, IndexColorModel cm)
  
  Constructs a BufferedImage of one of the predefined image types: TYPE_BYTE_BINARY or TYPE_BYTE_INDEXED.
  If the image type is TYPE_BYTE_BINARY, the number of entries in the color model is used to determine whether the image should have 1, 2, or 4 bits per pixel. If the color model has 1 or 2 entries, the image will have 1 bit per pixel. If it has 3 or 4 entries, the image with have 2 bits per pixel. If it has between 5 and 16 entries, the image will have 4 bits per pixel. Otherwise, an IllegalArgumentException will be thrown.
  
  Parameters:
  
  width - width of the created image
  
  height - height of the created image
  
  imageType - type of the created image
  
  cm - IndexColorModel of the created image
  
  Throws:
  
  IllegalArgumentException - if the imageType is not TYPE_BYTE_BINARY or TYPE_BYTE_INDEXED or if the imageType is TYPE_BYTE_BINARY and the color map has more than 16 entries.
  
  See Also:
  
  TYPE_BYTE_BINARY, TYPE_BYTE_INDEXED
- BufferedImage
  
  public BufferedImage(ColorModel cm, WritableRaster raster, boolean isRasterPremultiplied, Hashtable<?,?> properties)
  
  Constructs a new BufferedImage with a specified ColorModel and Raster. If the number and types of bands in the SampleModel of the Raster do not match the number and types required by the ColorModel to represent its color and alpha components, a RasterFormatException is thrown. This method can multiply or divide the color Raster data by alpha to match the alphaPremultiplied state in the ColorModel. Properties for this BufferedImage can be established by passing in a Hashtable of String/Object pairs.
  
  Parameters:
  
  cm - ColorModel for the new image
  
  raster - Raster for the image data
  
  isRasterPremultiplied - if true, the data in the raster has been premultiplied with alpha.
  
  properties - Hashtable of String/Object pairs.
  
  Throws:
  
  RasterFormatException - if the number and types of bands in the SampleModel of the Raster do not match the number and types required by the ColorModel to represent its color and alpha components.
  
  IllegalArgumentException - if raster is incompatible with cm
  
  See Also:
  
  ColorModel, Raster, WritableRaster
Method Details
- getType
  
  public int getType()
  
  Returns the image type. If it is not one of the known types, TYPE_CUSTOM is returned.
  
  Returns:
  
  the image type of this BufferedImage.
  
  See Also:
  
  TYPE_INT_RGB, TYPE_INT_ARGB, TYPE_INT_ARGB_PRE, TYPE_INT_BGR, TYPE_3BYTE_BGR, TYPE_4BYTE_ABGR, TYPE_4BYTE_ABGR_PRE, TYPE_BYTE_GRAY, TYPE_BYTE_BINARY, TYPE_BYTE_INDEXED, TYPE_USHORT_GRAY, TYPE_USHORT_565_RGB, TYPE_USHORT_555_RGB, TYPE_CUSTOM
- getColorModel
  
  public ColorModel getColorModel()
  
  Returns the ColorModel.
  
  Specified by:
  
  getColorModel in interface RenderedImage
  
  Returns:
  
  the ColorModel of this BufferedImage.
- getRaster
  
  public WritableRaster getRaster()
  
  Returns the WritableRaster.
  
  Returns:
  
  the WritableRaster of this BufferedImage.
- getAlphaRaster
  
  public WritableRaster getAlphaRaster()
  
  Returns a WritableRaster representing the alpha channel for BufferedImage objects with ColorModel objects that support a separate spatial alpha channel, such as ComponentColorModel and DirectColorModel. Returns null if there is no alpha channel associated with the ColorModel in this image. This method assumes that for all ColorModel objects other than IndexColorModel, if the ColorModel supports alpha, there is a separate alpha channel which is stored as the last band of image data. If the image uses an IndexColorModel that has alpha in the lookup table, this method returns null since there is no spatially discrete alpha channel. This method creates a new WritableRaster, but shares the data array.
  
  Returns:
  
  a WritableRaster or null if this BufferedImage has no alpha channel associated with its ColorModel.
- getRGB
  
  public int getRGB(int x, int y)
  
  Returns an integer pixel in the default RGB color model (TYPE_INT_ARGB) and default sRGB colorspace. Color conversion takes place if this default model does not match the image ColorModel. There are only 8-bits of precision for each color component in the returned data when using this method.
  An ArrayOutOfBoundsException may be thrown if the coordinates are not in bounds. However, explicit bounds checking is not guaranteed.
  
  Parameters:
  
  x - the X coordinate of the pixel from which to get the pixel in the default RGB color model and sRGB color space
  
  y - the Y coordinate of the pixel from which to get the pixel in the default RGB color model and sRGB color space
  
  Returns:
  
  an integer pixel in the default RGB color model and default sRGB colorspace.
  
  See Also:
  
  setRGB(int, int, int), setRGB(int, int, int, int, int[], int, int)
- getRGB
  
  public int[] getRGB(int startX, int startY, int w, int h, int[] rgbArray, int offset, int scansize)
  Returns an array of integer pixels in the default RGB color model (TYPE_INT_ARGB) and default sRGB color space, from a portion of the image data. Color conversion takes place if the default model does not match the image ColorModel. There are only 8-bits of precision for each color component in the returned data when using this method. With a specified coordinate (x, y) in the image, the ARGB pixel can be accessed in this way:
  pixel = rgbArray[offset + (y-startY)*scansize + (x-startX)];
  
  An ArrayOutOfBoundsException may be thrown if the region is not in bounds. However, explicit bounds checking is not guaranteed.
  Parameters:
  
  startX - the starting X coordinate
  
  startY - the starting Y coordinate
  
  w - width of region
  
  h - height of region
  
  rgbArray - if not null, the rgb pixels are written here
  
  offset - offset into the rgbArray
  
  scansize - scanline stride for the rgbArray
  
  Returns:
  
  array of RGB pixels.
  
  See Also:
  
  setRGB(int, int, int), setRGB(int, int, int, int, int[], int, int)
- setRGB
  
  public void setRGB(int x, int y, int rgb)
  
  Sets a pixel in this BufferedImage to the specified RGB value. The pixel is assumed to be in the default RGB color model, TYPE_INT_ARGB, and default sRGB color space. For images with an IndexColorModel, the index with the nearest color is chosen.
  An ArrayOutOfBoundsException may be thrown if the coordinates are not in bounds. However, explicit bounds checking is not guaranteed.
  
  Parameters:
  
  x - the X coordinate of the pixel to set
  
  y - the Y coordinate of the pixel to set
  
  rgb - the RGB value
  
  See Also:
  
  getRGB(int, int), getRGB(int, int, int, int, int[], int, int)
- setRGB
  
  public void setRGB(int startX, int startY, int w, int h, int[] rgbArray, int offset, int scansize)
  Sets an array of integer pixels in the default RGB color model (TYPE_INT_ARGB) and default sRGB color space, into a portion of the image data. Color conversion takes place if the default model does not match the image ColorModel. There are only 8-bits of precision for each color component in the returned data when using this method. With a specified coordinate (x, y) in the this image, the ARGB pixel can be accessed in this way:
  pixel = rgbArray[offset + (y-startY)*scansize + (x-startX)];
  WARNING: No dithering takes place.
  An ArrayOutOfBoundsException may be thrown if the region is not in bounds. However, explicit bounds checking is not guaranteed.
  Parameters:
  
  startX - the starting X coordinate
  
  startY - the starting Y coordinate
  
  w - width of the region
  
  h - height of the region
  
  rgbArray - the rgb pixels
  
  offset - offset into the rgbArray
  
  scansize - scanline stride for the rgbArray
  
  See Also:
  
  getRGB(int, int), getRGB(int, int, int, int, int[], int, int)
- getWidth
  
  public int getWidth()
  
  Returns the width of the BufferedImage.
  
  Specified by:
  
  getWidth in interface RenderedImage
  
  Returns:
  
  the width of this BufferedImage
- getHeight
  
  public int getHeight()
  
  Returns the height of the BufferedImage.
  
  Specified by:
  
  getHeight in interface RenderedImage
  
  Returns:
  
  the height of this BufferedImage
- getWidth
  
  public int getWidth(ImageObserver observer)
  
  Returns the width of the BufferedImage.
  
  Specified by:
  
  getWidth in class Image
  
  Parameters:
  
  observer - ignored
  
  Returns:
  
  the width of this BufferedImage
  
  See Also:
  
  Image.getHeight(java.awt.image.ImageObserver), ImageObserver
- getHeight
  
  public int getHeight(ImageObserver observer)
  
  Returns the height of the BufferedImage.
  
  Specified by:
  
  getHeight in class Image
  
  Parameters:
  
  observer - ignored
  
  Returns:
  
  the height of this BufferedImage
  
  See Also:
  
  Image.getWidth(java.awt.image.ImageObserver), ImageObserver
- getSource
  
  public ImageProducer getSource()
  
  Returns the object that produces the pixels for the image.
  
  Specified by:
  
  getSource in class Image
  
  Returns:
  
  the ImageProducer that is used to produce the pixels for this image.
  
  See Also:
  
  ImageProducer
- getProperty
  
  public Object getProperty(String name, ImageObserver observer)
  
  Returns a property of the image by name. Individual property names are defined by the various image formats. If a property is not defined for a particular image, this method returns the UndefinedProperty field. If the properties for this image are not yet known, then this method returns null and the ImageObserver object is notified later. The property name "comment" should be used to store an optional comment that can be presented to the user as a description of the image, its source, or its author.
  
  Specified by:
  
  getProperty in class Image
  
  Parameters:
  
  name - the property name
  
  observer - the ImageObserver that receives notification regarding image information
  
  Returns:
  
  an Object that is the property referred to by the specified name or null if the properties of this image are not yet known.
  
  Throws:
  
  NullPointerException - if the property name is null.
  
  See Also:
  
  ImageObserver, Image.UndefinedProperty
- getProperty
  
  public Object getProperty(String name)
  
  Returns a property of the image by name.
  
  Specified by:
  
  getProperty in interface RenderedImage
  
  Parameters:
  
  name - the property name
  
  Returns:
  
  an Object that is the property referred to by the specified name.
  
  Throws:
  
  NullPointerException - if the property name is null.
  
  See Also:
  
  Image.UndefinedProperty
- getGraphics
  
  public Graphics getGraphics()
  
  This method returns a Graphics2D, but is here for backwards compatibility. createGraphics is more convenient, since it is declared to return a Graphics2D.
  
  Specified by:
  
  getGraphics in class Image
  
  Returns:
  
  a Graphics2D, which can be used to draw into this image.
  
  See Also:
  
  Graphics, Component.createImage(int, int)
- createGraphics
  
  public Graphics2D createGraphics()
  
  Creates a Graphics2D, which can be used to draw into this BufferedImage.
  
  Returns:
  
  a Graphics2D, used for drawing into this image.
- getSubimage
  
  public BufferedImage getSubimage(int x, int y, int w, int h)
  
  Returns a subimage defined by a specified rectangular region. The returned BufferedImage shares the same data array as the original image.
  
  Parameters:
  
  x - the X coordinate of the upper-left corner of the specified rectangular region
  
  y - the Y coordinate of the upper-left corner of the specified rectangular region
  
  w - the width of the specified rectangular region
  
  h - the height of the specified rectangular region
  
  Returns:
  
  a BufferedImage that is the subimage of this BufferedImage.
  
  Throws:
  
  RasterFormatException - if the specified area is not contained within this BufferedImage.
- isAlphaPremultiplied
  
  public boolean isAlphaPremultiplied()
  
  Returns whether or not the alpha has been premultiplied. It returns false if there is no alpha.
  
  Returns:
  
  true if the alpha has been premultiplied; false otherwise.
- coerceData
  
  public void coerceData(boolean isAlphaPremultiplied)
  
  Forces the data to match the state specified in the isAlphaPremultiplied variable. It may multiply or divide the color raster data by alpha, or do nothing if the data is in the correct state.
  
  Parameters:
  
  isAlphaPremultiplied - true if the alpha has been premultiplied; false otherwise.
- toString
  
  public String toString()
  
  Returns a String representation of this BufferedImage object and its values.
  
  Overrides:
  
  toString in class Object
  
  Returns:
  
  a String representing this BufferedImage.
- getSources
  
  public Vector<RenderedImage> getSources()
  
  Returns a Vector of RenderedImage objects that are the immediate sources, not the sources of these immediate sources, of image data for this BufferedImage. This method returns null if the BufferedImage has no information about its immediate sources. It returns an empty Vector if the BufferedImage has no immediate sources.
  
  Specified by:
  
  getSources in interface RenderedImage
  
  Returns:
  
  a Vector containing immediate sources of this BufferedImage object's image date, or null if this BufferedImage has no information about its immediate sources, or an empty Vector if this BufferedImage has no immediate sources.
- getPropertyNames
  
  public String[] getPropertyNames()
  
  Returns an array of names recognized by getProperty(String) or null, if no property names are recognized.
  
  Specified by:
  
  getPropertyNames in interface RenderedImage
  
  Returns:
  
  a String array containing all of the property names that getProperty(String) recognizes; or null if no property names are recognized.
- getMinX
  
  public int getMinX()
  
  Returns the minimum x coordinate of this BufferedImage. This is always zero.
  
  Specified by:
  
  getMinX in interface RenderedImage
  
  Returns:
  
  the minimum x coordinate of this BufferedImage.
- getMinY
  
  public int getMinY()
  
  Returns the minimum y coordinate of this BufferedImage. This is always zero.
  
  Specified by:
  
  getMinY in interface RenderedImage
  
  Returns:
  
  the minimum y coordinate of this BufferedImage.
- getSampleModel
  
  public SampleModel getSampleModel()
  
  Returns the SampleModel associated with this BufferedImage.
  
  Specified by:
  
  getSampleModel in interface RenderedImage
  
  Returns:
  
  the SampleModel of this BufferedImage.
- getNumXTiles
  
  public int getNumXTiles()
  
  Returns the number of tiles in the x direction. This is always one.
  
  Specified by:
  
  getNumXTiles in interface RenderedImage
  
  Returns:
  
  the number of tiles in the x direction.
- getNumYTiles
  
  public int getNumYTiles()
  
  Returns the number of tiles in the y direction. This is always one.
  
  Specified by:
  
  getNumYTiles in interface RenderedImage
  
  Returns:
  
  the number of tiles in the y direction.
- getMinTileX
  
  public int getMinTileX()
  
  Returns the minimum tile index in the x direction. This is always zero.
  
  Specified by:
  
  getMinTileX in interface RenderedImage
  
  Returns:
  
  the minimum tile index in the x direction.
- getMinTileY
  
  public int getMinTileY()
  
  Returns the minimum tile index in the y direction. This is always zero.
  
  Specified by:
  
  getMinTileY in interface RenderedImage
  
  Returns:
  
  the minimum tile index in the y direction.
- getTileWidth
  
  public int getTileWidth()
  
  Returns the tile width in pixels.
  
  Specified by:
  
  getTileWidth in interface RenderedImage
  
  Returns:
  
  the tile width in pixels.
- getTileHeight
  
  public int getTileHeight()
  
  Returns the tile height in pixels.
  
  Specified by:
  
  getTileHeight in interface RenderedImage
  
  Returns:
  
  the tile height in pixels.
- getTileGridXOffset
  
  public int getTileGridXOffset()
  
  Returns the x offset of the tile grid relative to the origin, For example, the x coordinate of the location of tile (0, 0). This is always zero.
  
  Specified by:
  
  getTileGridXOffset in interface RenderedImage
  
  Returns:
  
  the x offset of the tile grid.
- getTileGridYOffset
  
  public int getTileGridYOffset()
  
  Returns the y offset of the tile grid relative to the origin, For example, the y coordinate of the location of tile (0, 0). This is always zero.
  
  Specified by:
  
  getTileGridYOffset in interface RenderedImage
  
  Returns:
  
  the y offset of the tile grid.
- getTile
  
  public Raster getTile(int tileX, int tileY)
  
  Returns tile (tileX, tileY). Note that tileX and tileY are indices into the tile array, not pixel locations. The Raster that is returned is live, which means that it is updated if the image is changed.
  
  Specified by:
  
  getTile in interface RenderedImage
  
  Parameters:
  
  tileX - the x index of the requested tile in the tile array
  
  tileY - the y index of the requested tile in the tile array
  
  Returns:
  
  a Raster that is the tile defined by the arguments tileX and tileY.
  
  Throws:
  
  ArrayIndexOutOfBoundsException - if both tileX and tileY are not equal to 0
- getData
  
  public Raster getData()
  
  Returns the image as one large tile. The Raster returned is a copy of the image data is not updated if the image is changed.
  
  Specified by:
  
  getData in interface RenderedImage
  
  Returns:
  
  a Raster that is a copy of the image data.
  
  See Also:
  
  setData(Raster)
- getData
  
  public Raster getData(Rectangle rect)
  
  Computes and returns an arbitrary region of the BufferedImage. The Raster returned is a copy of the image data and is not updated if the image is changed.
  
  Specified by:
  
  getData in interface RenderedImage
  
  Parameters:
  
  rect - the region of the BufferedImage to be returned.
  
  Returns:
  
  a Raster that is a copy of the image data of the specified region of the BufferedImage
  
  See Also:
  
  setData(Raster)
- copyData
  
  public WritableRaster copyData(WritableRaster outRaster)
  
  Computes an arbitrary rectangular region of the BufferedImage and copies it into a specified WritableRaster. The region to be computed is determined from the bounds of the specified WritableRaster. The specified WritableRaster must have a SampleModel that is compatible with this image. If outRaster is null, an appropriate WritableRaster is created.
  
  Specified by:
  
  copyData in interface RenderedImage
  
  Parameters:
  
  outRaster - a WritableRaster to hold the returned part of the image, or null
  
  Returns:
  
  a reference to the supplied or created WritableRaster.
- setData
  
  public void setData(Raster r)
  
  Sets a rectangular region of the image to the contents of the specified Raster r, which is assumed to be in the same coordinate space as the BufferedImage. The operation is clipped to the bounds of the BufferedImage.
  
  Specified by:
  
  setData in interface WritableRenderedImage
  
  Parameters:
  
  r - the specified Raster
  
  See Also:
  
  getData(), getData(Rectangle)
- addTileObserver
  
  public void addTileObserver(TileObserver to)
  
  Adds a tile observer. If the observer is already present, it receives multiple notifications.
  
  Specified by:
  
  addTileObserver in interface WritableRenderedImage
  
  Parameters:
  
  to - the specified TileObserver
- removeTileObserver
  
  public void removeTileObserver(TileObserver to)
  
  Removes a tile observer. If the observer was not registered, nothing happens. If the observer was registered for multiple notifications, it is now registered for one fewer notification.
  
  Specified by:
  
  removeTileObserver in interface WritableRenderedImage
  
  Parameters:
  
  to - the specified TileObserver.
- isTileWritable
  
  public boolean isTileWritable(int tileX, int tileY)
  
  Returns whether or not a tile is currently checked out for writing.
  
  Specified by:
  
  isTileWritable in interface WritableRenderedImage
  
  Parameters:
  
  tileX - the x index of the tile.
  
  tileY - the y index of the tile.
  
  Returns:
  
  true if the tile specified by the specified indices is checked out for writing; false otherwise.
  
  Throws:
  
  ArrayIndexOutOfBoundsException - if both tileX and tileY are not equal to 0
- getWritableTileIndices
  
  public Point[] getWritableTileIndices()
  
  Returns an array of Point objects indicating which tiles are checked out for writing. Returns null if none are checked out.
  
  Specified by:
  
  getWritableTileIndices in interface WritableRenderedImage
  
  Returns:
  
  a Point array that indicates the tiles that are checked out for writing, or null if no tiles are checked out for writing.
- hasTileWriters
  
  public boolean hasTileWriters()
  Returns whether or not any tile is checked out for writing. Semantically equivalent to
  (getWritableTileIndices() != null).
  Specified by:
  
  hasTileWriters in interface WritableRenderedImage
  
  Returns:
  
  true if any tile is checked out for writing; false otherwise.
- getWritableTile
  
  public WritableRaster getWritableTile(int tileX, int tileY)
  
  Checks out a tile for writing. All registered TileObservers are notified when a tile goes from having no writers to having one writer.
  
  Specified by:
  
  getWritableTile in interface WritableRenderedImage
  
  Parameters:
  
  tileX - the x index of the tile
  
  tileY - the y index of the tile
  
  Returns:
  
  a WritableRaster that is the tile, indicated by the specified indices, to be checked out for writing.
- releaseWritableTile
  
  public void releaseWritableTile(int tileX, int tileY)
  
  Relinquishes permission to write to a tile. If the caller continues to write to the tile, the results are undefined. Calls to this method should only appear in matching pairs with calls to getWritableTile(int, int). Any other leads to undefined results. All registered TileObservers are notified when a tile goes from having one writer to having no writers.
  
  Specified by:
  
  releaseWritableTile in interface WritableRenderedImage
  
  Parameters:
  
  tileX - the x index of the tile
  
  tileY - the y index of the tile
- getTransparency
  
  public int getTransparency()
  
  Returns the transparency. Returns either OPAQUE, BITMASK, or TRANSLUCENT.
  
  Specified by:
  
  getTransparency in interface Transparency
  
  Returns:
  
  the transparency of this BufferedImage.
  
  Since:
  
  1.5
  
  See Also:
  
  Transparency.OPAQUE, Transparency.BITMASK, Transparency.TRANSLUCENT

Class BufferedImage