org.apache.fop.render.java2d

Class Java2DPainter

java.lang.Object

org.apache.fop.render.intermediate.AbstractIFPainter

org.apache.fop.render.java2d.Java2DPainter

All Implemented Interfaces:

IFPainter

public class Java2DPainter
extends AbstractIFPainter

IFPainter implementation that paints on a Graphics2D instance.

Field Summary

Fields

Modifier and Type	Field and Description
protected FontInfo	fontInfo The font information
protected Java2DGraphicsState	g2dState The current state, holds a Graphics2D and its context
protected IFContext	ifContext the IF context

Fields inherited from class org.apache.fop.render.intermediate.AbstractIFPainter

INSTREAM_OBJECT_URI, state

Constructor Summary

Constructors

Constructor and Description
Java2DPainter(java.awt.Graphics2D g2d, IFContext context, FontInfo fontInfo) Main constructor.
Java2DPainter(java.awt.Graphics2D g2d, IFContext context, FontInfo fontInfo, IFState state) Special constructor for embedded use (when another painter uses Java2DPainter to convert part of a document into a bitmap, for example).

Method Summary

Methods

Modifier and Type	Method and Description
void	clipRect(java.awt.Rectangle rect) Restricts the current clipping region with the given rectangle.
protected RenderingContext	createRenderingContext() Creates a new RenderingContext instance.
void	drawBorderRect(java.awt.Rectangle rect, BorderProps top, BorderProps bottom, BorderProps left, BorderProps right) Draws a border rectangle.
void	drawImage(org.w3c.dom.Document doc, java.awt.Rectangle rect) Draws an image (represented by a DOM document) inside a given rectangle.
void	drawImage(java.lang.String uri, java.awt.Rectangle rect) Draws an image identified by a URI inside a given rectangle.
void	drawLine(java.awt.Point start, java.awt.Point end, int width, java.awt.Color color, RuleStyle style) Draws a line.
void	drawText(int x, int y, int letterSpacing, int wordSpacing, int[][] dp, java.lang.String text) Draws text.
void	endGroup() Ends the current group and restores the previous coordinate system.
void	endViewport() Ends the current viewport and restores the previous coordinate system.
void	fillRect(java.awt.Rectangle rect, java.awt.Paint fill) Fills a rectangular area.
IFContext	getContext() Returns the intermediate format context object.
protected FontInfo	getFontInfo() Returns the associated FontInfo object.
protected Java2DGraphicsState	getState() Returns the Java2D graphics state.
protected void	restoreGraphicsState() Restores the last graphics state from the stack.
protected void	saveGraphicsState() Saves the current graphics state on the stack.
void	startGroup(java.awt.geom.AffineTransform transform) Starts a new group of graphical elements.
void	startViewport(java.awt.geom.AffineTransform transform, java.awt.Dimension size, java.awt.Rectangle clipRect) Starts a new viewport, establishing a new coordinate system.

Methods inherited from class org.apache.fop.render.intermediate.AbstractIFPainter

createDefaultImageProcessingHints, drawImage, drawImage, drawImageUsingDocument, drawImageUsingImageHandler, drawImageUsingURI, getFopFactory, getImageInfo, getLineBoundingBox, getUserAgent, hasOnlySolidBorders, setFont, startGroup, startViewport, toPoints

Methods inherited from class java.lang.Object

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

Field Detail

ifContext

protected IFContext ifContext

the IF context

fontInfo

protected FontInfo fontInfo

The font information

g2dState

protected Java2DGraphicsState g2dState

The current state, holds a Graphics2D and its context

Constructor Detail

Java2DPainter

public Java2DPainter(java.awt.Graphics2D g2d,
             IFContext context,
             FontInfo fontInfo)

Main constructor.

Parameters:

g2d - the target Graphics2D instance

context - the IF context

fontInfo - the font information

Java2DPainter

public Java2DPainter(java.awt.Graphics2D g2d,
             IFContext context,
             FontInfo fontInfo,
             IFState state)

Special constructor for embedded use (when another painter uses Java2DPainter to convert part of a document into a bitmap, for example).

Parameters:

g2d - the target Graphics2D instance

context - the IF context

fontInfo - the font information

state - the IF state object

Method Detail

getContext

public IFContext getContext()

Returns the intermediate format context object.

Specified by:

getContext in class AbstractIFPainter

Returns:

the context object

getFontInfo

protected FontInfo getFontInfo()

Returns the associated FontInfo object.

Returns:

the font info

getState

protected Java2DGraphicsState getState()

Returns the Java2D graphics state.

Returns:

the graphics state

startViewport

public void startViewport(java.awt.geom.AffineTransform transform,
                 java.awt.Dimension size,
                 java.awt.Rectangle clipRect)
                   throws IFException

Starts a new viewport, establishing a new coordinate system. A viewport has a size and can optionally be clipped. Corresponds to SVG's svg element.

Parameters:

transform - the transformation matrix establishing the new coordinate system

size - the size of the viewport

clipRect - the clipping rectangle (may be null)

Throws:

IFException - if an error occurs while handling this element

endViewport

public void endViewport()
                 throws IFException

Ends the current viewport and restores the previous coordinate system.

Throws:

IFException - if an error occurs while handling this element

startGroup

public void startGroup(java.awt.geom.AffineTransform transform)
                throws IFException

Starts a new group of graphical elements. Corresponds to SVG's g element.

Parameters:

transform - the transformation matrix establishing the new coordinate system

Throws:

IFException - if an error occurs while handling this element

endGroup

public void endGroup()
              throws IFException

Ends the current group and restores the previous coordinate system.

Throws:

IFException - if an error occurs while handling this element

drawImage

public void drawImage(java.lang.String uri,
             java.awt.Rectangle rect)
               throws IFException

Draws an image identified by a URI inside a given rectangle. This is the equivalent to an fo:external-graphic in XSL-FO.

Parameters:

uri - the image's URI

rect - the rectangle in which the image shall be painted

Throws:

IFException - if an error occurs while handling this event

createRenderingContext

protected RenderingContext createRenderingContext()

Creates a new RenderingContext instance.

Specified by:

createRenderingContext in class AbstractIFPainter

Returns:

the new rendering context.

drawImage

public void drawImage(org.w3c.dom.Document doc,
             java.awt.Rectangle rect)
               throws IFException

Draws an image (represented by a DOM document) inside a given rectangle. This is the equivalent to an fo:instream-foreign-object in XSL-FO.

Parameters:

doc - the DOM document containing the foreign object

rect - the rectangle in which the image shall be painted

Throws:

IFException - if an error occurs while handling this event

clipRect

public void clipRect(java.awt.Rectangle rect)
              throws IFException

Restricts the current clipping region with the given rectangle.

Parameters:

rect - the rectangle's coordinates and extent

Throws:

IFException - if an error occurs while handling this event

fillRect

public void fillRect(java.awt.Rectangle rect,
            java.awt.Paint fill)
              throws IFException

Fills a rectangular area.

Parameters:

rect - the rectangle's coordinates and extent

fill - the fill paint

Throws:

IFException - if an error occurs while handling this event

drawBorderRect

public void drawBorderRect(java.awt.Rectangle rect,
                  BorderProps top,
                  BorderProps bottom,
                  BorderProps left,
                  BorderProps right)
                    throws IFException

Draws a border rectangle. The border segments are specified through BorderProps instances.

Specified by:

drawBorderRect in interface IFPainter

Overrides:

drawBorderRect in class AbstractIFPainter

Parameters:

rect - the rectangle's coordinates and extent

top - the border segment on the top edge

bottom - the border segment on the bottom edge

left - the border segment on the left edge

right - the border segment on the right edge

Throws:

IFException - if an error occurs while handling this event

drawLine

public void drawLine(java.awt.Point start,
            java.awt.Point end,
            int width,
            java.awt.Color color,
            RuleStyle style)
              throws IFException

Draws a line. NOTE: Currently, only horizontal lines are implemented!

Specified by:

drawLine in interface IFPainter

Overrides:

drawLine in class AbstractIFPainter

Parameters:

start - the start point of the line

end - the end point of the line

width - the line width

color - the line color

style - the line style (using the Constants.EN_* constants for the rule-style property)

Throws:

IFException - if an error occurs while handling this event

drawText

public void drawText(int x,
            int y,
            int letterSpacing,
            int wordSpacing,
            int[][] dp,
            java.lang.String text)
              throws IFException

Draws text. The initial coordinates (x and y) point to the starting point at the normal baseline of the font. The parameters letterSpacing, wordSpacing and the array dx are optional and can be used to influence character positioning (for example, for kerning).

Parameters:

x - X-coordinate of the starting point of the text

y - Y-coordinate of the starting point of the text

letterSpacing - additional spacing between characters (may be 0)

wordSpacing - additional spacing between words (may be 0)

dp - an array of 4-tuples, expressing [X,Y] placment adjustments and [X,Y] advancement adjustments, in that order (may be null); if not null, then adjustments.length must be the same as text.length()

text - the text

Throws:

IFException - if an error occurs while handling this event

saveGraphicsState

protected void saveGraphicsState()

Saves the current graphics state on the stack.

restoreGraphicsState

protected void restoreGraphicsState()

Restores the last graphics state from the stack.