org.apache.poi.sl.draw

Class BitmapImageRenderer

java.lang.Object

org.apache.poi.sl.draw.BitmapImageRenderer

All Implemented Interfaces:

ImageRenderer

public class BitmapImageRenderer
extends Object
implements ImageRenderer

For now this class renders only images supported by the javax.imageio.ImageIO framework.

Field Summary

Fields

Modifier and Type	Field and Description
protected BufferedImage	img

Constructor Summary

Constructors

Constructor and Description
BitmapImageRenderer()

Method Summary

Modifier and Type	Method and Description
boolean	canRender(String contentType) Determines if this image renderer implementation supports the given contentType
boolean	drawImage(Graphics2D graphics, Rectangle2D anchor) Render picture data into the supplied graphics
boolean	drawImage(Graphics2D graphics, Rectangle2D anchor, Insets clip) Render picture data into the supplied graphics
Rectangle2D	getBounds()
String	getCachedContentType()
byte[]	getCachedImage()
BufferedImage	getImage()
BufferedImage	getImage(Dimension2D dim)
Rectangle2D	getNativeBounds()
void	loadImage(byte[] data, String contentType) Load and buffer the image
void	loadImage(InputStream data, String contentType) Load and buffer the image
static BufferedImage	setAlpha(BufferedImage image, double alpha)
void	setAlpha(double alpha)
void	setCacheInput(boolean enable) Dis-/Enables caching of input data for later retrieval.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.poi.sl.draw.ImageRenderer

getDimension, getGenericRecord, setDefaultCharset

Field Detail

img

protected BufferedImage img

Constructor Detail

BitmapImageRenderer

public BitmapImageRenderer()

Method Detail

canRender

public boolean canRender(String contentType)

Description copied from interface: ImageRenderer

Determines if this image renderer implementation supports the given contentType

Specified by:

canRender in interface ImageRenderer

Parameters:

contentType - the image content type

Returns:

if the content type is supported

loadImage

public void loadImage(InputStream data,
                      String contentType)
               throws IOException

Description copied from interface: ImageRenderer

Load and buffer the image

Specified by:

loadImage in interface ImageRenderer

Parameters:

data - the raw image stream

contentType - the content type

Throws:

IOException

loadImage

public void loadImage(byte[] data,
                      String contentType)
               throws IOException

Description copied from interface: ImageRenderer

Load and buffer the image

Specified by:

loadImage in interface ImageRenderer

Parameters:

data - the raw image bytes

contentType - the content type

Throws:

IOException

getImage

public BufferedImage getImage()

Specified by:

getImage in interface ImageRenderer

Returns:

the image as buffered image or null if image could not be loaded

getImage

public BufferedImage getImage(Dimension2D dim)

Specified by:

getImage in interface ImageRenderer

Parameters:

dim - the dimension in pixels of the returned image

Returns:

the image as buffered image or null if image could not be loaded

getBounds

public Rectangle2D getBounds()

Specified by:

getBounds in interface ImageRenderer

Returns:

the bounds of the buffered image in pixel

setAlpha

public void setAlpha(double alpha)

Specified by:

setAlpha in interface ImageRenderer

Parameters:

alpha - the alpha [0..1] to be added to the image (possibly already containing an alpha channel)

setAlpha

public static BufferedImage setAlpha(BufferedImage image,
                                     double alpha)

drawImage

public boolean drawImage(Graphics2D graphics,
                         Rectangle2D anchor)

Description copied from interface: ImageRenderer

Render picture data into the supplied graphics

Specified by:

drawImage in interface ImageRenderer

Returns:

true if the picture data was successfully rendered

drawImage

public boolean drawImage(Graphics2D graphics,
                         Rectangle2D anchor,
                         Insets clip)

Description copied from interface: ImageRenderer

Render picture data into the supplied graphics

Specified by:

drawImage in interface ImageRenderer

Returns:

true if the picture data was successfully rendered

getNativeBounds

public Rectangle2D getNativeBounds()

Specified by:

getNativeBounds in interface ImageRenderer

Returns:

the format-specific / not-normalized bounds of the image

setCacheInput

public void setCacheInput(boolean enable)

Description copied from interface: ImageRenderer

Dis-/Enables caching of input data for later retrieval. Opposed to ImageRenderer.getImage(), which returns a BufferedImage, the cached image can be later used to embedded the original, unmodified data

Specified by:

setCacheInput in interface ImageRenderer

Parameters:

enable - dis-/enables caching - this is an optional operation. false removes already cached data

getCachedImage

public byte[] getCachedImage()

Specified by:

getCachedImage in interface ImageRenderer

Returns:

the cached image data

getCachedContentType

public String getCachedContentType()

Specified by:

getCachedContentType in interface ImageRenderer

Returns:

the cached content type