Package com.orsonpdf

Class GraphicsStream

java.lang.Object

com.orsonpdf.PDFObject

com.orsonpdf.Stream

com.orsonpdf.GraphicsStream

public class GraphicsStream
extends Stream

A Stream that contains graphics for the PDF document that can be generated via the PDFGraphics2D class. The Page class will create a GraphicsStream instance to represent its content. You won't normally interact directly with this class, it is intended that the PDFGraphics2D class drives the calls to the methods of this class.

Field Summary

Fields

Modifier and Type	Field	Description
private int	alpha	The most recent alpha transparency value (in the range 0 to 255).
private float	alphaFactor
private java.io.ByteArrayOutputStream	content	The stream content.
private java.awt.Font	font	The most recent font applied.
private java.text.DecimalFormat	geometryFormat	The decimal formatter for coordinates of geometrical shapes.
private Page	page	The page the graphics stream belongs to.
private java.awt.geom.AffineTransform	prevTransInv
private java.text.DecimalFormat	transformFormat	The decimal formatter for transform matrices.

Constructor Summary

Constructors

Constructor	Description
GraphicsStream(int number, Page page)	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
private void	addContent(java.lang.String s)
(package private) void	applyAlpha(int alpha)	Applies the alpha transparency.
(package private) void	applyClip(java.awt.Shape clip)	Applies the specified clip to the current clip.
(package private) void	applyComposite(java.awt.AlphaComposite alphaComp)	Applies the specified alpha composite.
(package private) void	applyFillColor(java.awt.Color c)	Applies a color for filling.
(package private) void	applyFillGradient(java.awt.GradientPaint gp)	Applies a GradientPaint for filling.
(package private) void	applyFillGradient(java.awt.RadialGradientPaint rgp)	Applies a RadialGradientPaint for filling.
(package private) void	applyFont(java.awt.Font font)	Applies the specified font (in fact, no change is made to the stream until the next call to drawString(java.lang.String, float, float)).
(package private) void	applyStroke(java.awt.Stroke s)	Applies a stroke.
(package private) void	applyStrokeColor(java.awt.Color c)	Applies a color for stroking.
(package private) void	applyStrokeGradient(java.awt.GradientPaint gp)	Applies a GradientPaint for stroking.
(package private) void	applyStrokeGradient(java.awt.RadialGradientPaint rgp)	Applies a RadialGradientPaint for stroking.
(package private) void	applyTextTransform(java.awt.geom.AffineTransform t)	Applies a text transform.
(package private) void	applyTransform(java.awt.geom.AffineTransform t)	Applies a graphics transform.
(package private) void	drawImage(java.awt.Image img, int x, int y, int w, int h)	Draws the specified image into the rectangle (x, y, w, h).
(package private) void	drawLine(java.awt.geom.Line2D line)	Draws the specified line.
(package private) void	drawPath2D(java.awt.geom.Path2D path)	Draws the specified path.
(package private) void	drawString(java.lang.String text, float x, float y)	Draws a string at the specified location.
(package private) void	fillPath2D(java.awt.geom.Path2D path)	Fills the specified path.
private java.lang.String	geomDP(double d)
private java.lang.String	getPDFPath(java.awt.geom.Path2D path)	A utility method to convert a Path2D instance to a PDF path string.
byte[]	getRawStreamData()	Returns the raw data for the stream.
(package private) void	popGraphicsState()	Pops the graphics state that was previously pushed onto the stack.
(package private) void	pushGraphicsState()	Pushes the current graphics state onto a stack for later retrieval.
(package private) void	setTransform(java.awt.geom.AffineTransform t)	Sets the transform.
private java.lang.String	transformDP(double d)

Methods inherited from class com.orsonpdf.Stream

addFilter, createDictionary, getObjectBytes, removeFilters

Methods inherited from class com.orsonpdf.PDFObject

getGeneration, getNumber, getReference, toPDFBytes

Methods inherited from class java.lang.Object

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

Field Detail

page

private Page page

The page the graphics stream belongs to. We need this reference to our "parent" so that we can access fonts in the document.

content

private java.io.ByteArrayOutputStream content

The stream content.

font

private java.awt.Font font

The most recent font applied.

alpha

private int alpha

The most recent alpha transparency value (in the range 0 to 255).

prevTransInv

private java.awt.geom.AffineTransform prevTransInv

geometryFormat

private java.text.DecimalFormat geometryFormat

The decimal formatter for coordinates of geometrical shapes.

transformFormat

private java.text.DecimalFormat transformFormat

The decimal formatter for transform matrices.

alphaFactor

private float alphaFactor

Constructor Detail

GraphicsStream

GraphicsStream(int number,
               Page page)

Creates a new instance.

Parameters:

number - the PDF object number.

page - the parent page (null not permitted).

Method Detail

addContent

private void addContent(java.lang.String s)

pushGraphicsState

void pushGraphicsState()

Pushes the current graphics state onto a stack for later retrieval.

popGraphicsState

void popGraphicsState()

Pops the graphics state that was previously pushed onto the stack.

applyTransform

void applyTransform(java.awt.geom.AffineTransform t)

Applies a graphics transform.

Parameters:

t - the transform (null not permitted).

setTransform

void setTransform(java.awt.geom.AffineTransform t)

Sets the transform.

Parameters:

t - the transform (null not permitted).

applyTextTransform

void applyTextTransform(java.awt.geom.AffineTransform t)

Applies a text transform.

Parameters:

t - the transform (null not permitted).

applyClip

void applyClip(java.awt.Shape clip)

Applies the specified clip to the current clip.

Parameters:

clip - the clip (null not permitted).

applyStroke

void applyStroke(java.awt.Stroke s)

Applies a stroke. If the stroke is not an instance of BasicStroke this method will do nothing.

Parameters:

s - the stroke.

applyStrokeColor

void applyStrokeColor(java.awt.Color c)

Applies a color for stroking.

Parameters:

c - the color (null not permitted).

applyFillColor

void applyFillColor(java.awt.Color c)

Applies a color for filling.

Parameters:

c - the color (null not permitted).

applyStrokeGradient

void applyStrokeGradient(java.awt.GradientPaint gp)

Applies a GradientPaint for stroking.

Parameters:

gp - the gradient paint (null not permitted).

applyStrokeGradient

void applyStrokeGradient(java.awt.RadialGradientPaint rgp)

Applies a RadialGradientPaint for stroking.

Parameters:

rgp - the gradient paint (null not permitted).

applyFillGradient

void applyFillGradient(java.awt.GradientPaint gp)

Applies a GradientPaint for filling.

Parameters:

gp - the gradient paint (null not permitted).

applyFillGradient

void applyFillGradient(java.awt.RadialGradientPaint rgp)

Applies a RadialGradientPaint for filling.

Parameters:

rgp - the gradient paint (null not permitted).

applyComposite

void applyComposite(java.awt.AlphaComposite alphaComp)

Applies the specified alpha composite.

Parameters:

alphaComp - the alpha composite (null permitted).

applyAlpha

void applyAlpha(int alpha)

Applies the alpha transparency.

Parameters:

alpha - the new alpha value (in the range 0 to 255).

geomDP

private java.lang.String geomDP(double d)

transformDP

private java.lang.String transformDP(double d)

drawLine

void drawLine(java.awt.geom.Line2D line)

Draws the specified line.

Parameters:

line - the line (null not permitted).

drawPath2D

void drawPath2D(java.awt.geom.Path2D path)

Draws the specified path.

Parameters:

path - the path (null not permitted).

fillPath2D

void fillPath2D(java.awt.geom.Path2D path)

Fills the specified path.

Parameters:

path - the path (null not permitted).

applyFont

void applyFont(java.awt.Font font)

Applies the specified font (in fact, no change is made to the stream until the next call to drawString(java.lang.String, float, float)).

Parameters:

font - the font.

drawString

void drawString(java.lang.String text,
                float x,
                float y)

Draws a string at the specified location.

Parameters:

text - the text.

x - the x-coordinate.

y - the y-coordinate.

drawImage

void drawImage(java.awt.Image img,
               int x,
               int y,
               int w,
               int h)

Draws the specified image into the rectangle (x, y, w, h).

Parameters:

img - the image.

x - the x-coordinate of the destination.

y - the y-coordinate of the destination.

w - the width of the destination.

h - the height of the destination.

getPDFPath

private java.lang.String getPDFPath(java.awt.geom.Path2D path)

A utility method to convert a Path2D instance to a PDF path string.

Parameters:

path - the path (null not permitted).

Returns:

The string.

getRawStreamData

public byte[] getRawStreamData()

Description copied from class: Stream

Returns the raw data for the stream.

Specified by:

getRawStreamData in class Stream

Returns:

The raw data for the stream.