org.apache.poi.hwmf.draw

Class HwmfGraphics

java.lang.Object

org.apache.poi.hwmf.draw.HwmfGraphics

All Implemented Interfaces:

HwmfCharsetAware

Direct Known Subclasses:

HemfGraphics

public class HwmfGraphics
extends Object
implements HwmfCharsetAware

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	HwmfGraphics.FillDrawStyle

Field Summary

Fields

Modifier and Type	Field and Description
protected Graphics2D	graphicsCtx
protected BitSet	objectIndexes
protected TreeMap<Integer,HwmfObjectTableEntry>	objectTable
protected HwmfDrawProperties	prop

Constructor Summary

Constructors

Constructor and Description
HwmfGraphics(Graphics2D graphicsCtx, Rectangle2D bbox) Initialize a graphics context for wmf rendering

Method Summary

Modifier and Type	Method and Description
void	addObjectTableEntry(HwmfObjectTableEntry entry) Adds an record of type HwmfObjectTableEntry to the object table.
void	applyObjectTableEntry(int index) Applies the object table entry
void	draw(Shape shape)
void	drawImage(BufferedImage img, Rectangle2D srcBounds, Rectangle2D dstBounds)
void	drawImage(ImageRenderer img, Rectangle2D srcBounds, Rectangle2D dstBounds)
void	drawString(byte[] text, int length, Point2D reference)
void	drawString(byte[] text, int length, Point2D reference, Dimension2D scale, Rectangle2D clip, HwmfText.WmfExtTextOutOptions opts, List<Integer> dx, boolean isUnicode)
void	fill(Shape shape)
protected Paint	getFill()
protected Paint	getHatchedFill()
ImageRenderer	getImageRenderer(String contentType)
AffineTransform	getInitTransform()
protected Paint	getLinearGradient()
static BufferedImage	getPatternFromLong(long patternLng, Color background, Color foreground, boolean hasAlpha)
protected Paint	getPatternPaint()
HwmfDrawProperties	getProperties()
protected Paint	getSolidFill()
protected BasicStroke	getStroke()
AffineTransform	getTransform()
protected HwmfDrawProperties	newProperties(HwmfDrawProperties oldProps)
void	restoreProperties(int index) Restores the properties from the stack
void	saveProperties() Saves the current properties to the stack
void	setCharsetProvider(Supplier<Charset> provider)
void	setClip(Shape clip, HwmfRegionMode regionMode, boolean useInitialAT) Set the new clipping region
void	setTransform(AffineTransform tx) Set the current AffineTransform
void	unsetObjectTableEntry(int index) Unsets (deletes) the object table entry for further usage When a META_DELETEOBJECT record (section 2.3.4.7) is received that specifies this object's particular index, the object's resources are released, the binding to its WMF Object Table index is ended, and the index value is returned to the pool of available indexes.
void	updateWindowMapMode() After setting various window and viewport related properties, the underlying graphics context needs to be adapted.

Methods inherited from class java.lang.Object

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

Field Detail

prop

protected HwmfDrawProperties prop

graphicsCtx

protected final Graphics2D graphicsCtx

objectIndexes

protected final BitSet objectIndexes

objectTable

protected final TreeMap<Integer,HwmfObjectTableEntry> objectTable

Constructor Detail

HwmfGraphics

public HwmfGraphics(Graphics2D graphicsCtx,
                    Rectangle2D bbox)

Initialize a graphics context for wmf rendering

Parameters:

graphicsCtx - the graphics context to delegate drawing calls

bbox - the bounding box of the wmf (taken from the placeable header)

Method Detail

getProperties

public HwmfDrawProperties getProperties()

newProperties

protected HwmfDrawProperties newProperties(HwmfDrawProperties oldProps)

draw

public void draw(Shape shape)

fill

public void fill(Shape shape)

getStroke

protected BasicStroke getStroke()

getFill

protected Paint getFill()

getLinearGradient

protected Paint getLinearGradient()

getSolidFill

protected Paint getSolidFill()

getHatchedFill

protected Paint getHatchedFill()

getPatternFromLong

public static BufferedImage getPatternFromLong(long patternLng,
                                               Color background,
                                               Color foreground,
                                               boolean hasAlpha)

getPatternPaint

protected Paint getPatternPaint()

addObjectTableEntry

public void addObjectTableEntry(HwmfObjectTableEntry entry)

Adds an record of type HwmfObjectTableEntry to the object table. Every object is assigned the lowest available index-that is, the smallest numerical value-in the WMF Object Table. This binding happens at object creation, not when the object is used. Moreover, each object table index uniquely refers to an object. Indexes in the WMF Object Table always start at 0.

Parameters:

entry - the object table entry

applyObjectTableEntry

public void applyObjectTableEntry(int index)

Applies the object table entry

Parameters:

index - the index of the object table entry (0-based)

Throws:

IndexOutOfBoundsException - if the index is out of range

NoSuchElementException - if the entry was deleted before

unsetObjectTableEntry

public void unsetObjectTableEntry(int index)

Unsets (deletes) the object table entry for further usage When a META_DELETEOBJECT record (section 2.3.4.7) is received that specifies this object's particular index, the object's resources are released, the binding to its WMF Object Table index is ended, and the index value is returned to the pool of available indexes. The index will be reused, if needed, by a subsequent object created by another Object Record Type record.

Parameters:

index - the index (0-based)

Throws:

IndexOutOfBoundsException - if the index is out of range

saveProperties

public void saveProperties()

Saves the current properties to the stack

restoreProperties

public void restoreProperties(int index)

Restores the properties from the stack

Parameters:

index - if the index is positive, the n-th element from the start is activated. If the index is negative, the n-th previous element relative to the current properties element is activated.

updateWindowMapMode

public void updateWindowMapMode()

After setting various window and viewport related properties, the underlying graphics context needs to be adapted. This methods gathers and sets the corresponding graphics transformations.

drawString

public void drawString(byte[] text,
                       int length,
                       Point2D reference)

drawString

public void drawString(byte[] text,
                       int length,
                       Point2D reference,
                       Dimension2D scale,
                       Rectangle2D clip,
                       HwmfText.WmfExtTextOutOptions opts,
                       List<Integer> dx,
                       boolean isUnicode)

setCharsetProvider

public void setCharsetProvider(Supplier<Charset> provider)

Specified by:

setCharsetProvider in interface HwmfCharsetAware

drawImage

public void drawImage(BufferedImage img,
                      Rectangle2D srcBounds,
                      Rectangle2D dstBounds)

drawImage

public void drawImage(ImageRenderer img,
                      Rectangle2D srcBounds,
                      Rectangle2D dstBounds)

getInitTransform

public AffineTransform getInitTransform()

Returns:

the initial AffineTransform, when this graphics context was created

getTransform

public AffineTransform getTransform()

Returns:

the current AffineTransform

setTransform

public void setTransform(AffineTransform tx)

Set the current AffineTransform

Parameters:

tx - the current AffineTransform

setClip

public void setClip(Shape clip,
                    HwmfRegionMode regionMode,
                    boolean useInitialAT)

Set the new clipping region

Parameters:

clip - the next clipping region to be processed

regionMode - the mode and operation of how to apply the next clipping region

useInitialAT - if true, the clipping is applied on the initial (world) coordinate system

getImageRenderer

public ImageRenderer getImageRenderer(String contentType)