Package com.openhtmltopdf.java2d

Class Java2DTextRenderer

java.lang.Object

com.openhtmltopdf.java2d.Java2DTextRenderer

All Implemented Interfaces:

TextRenderer

public class Java2DTextRenderer
extends java.lang.Object
implements TextRenderer

Renders to a Graphics2D instance.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	Java2DTextRenderer.FontRun

Field Summary

Fields

Modifier and Type	Field	Description
protected java.lang.Object	antiAliasRenderingHint
protected java.lang.Object	fractionalFontMetricsHint
protected float	scale
protected float	threshold

Constructor Summary

Constructors

Constructor	Description
Java2DTextRenderer()

Method Summary

Modifier and Type	Method	Description
private void	adjustGlyphPositions(java.lang.String string, JustificationInfo info, java.awt.font.GlyphVector vector)
private boolean	canDisplayWithFont(java.lang.String str, java.awt.Font fnt)
private java.util.List<Java2DTextRenderer.FontRun>	divideIntoFontRuns(java.util.List<java.awt.Font> fonts, java.lang.String string)
void	drawString(OutputDevice outputDevice, java.lang.String string, float x, float y)
void	drawString(OutputDevice outputDevice, java.lang.String string, float x, float y, JustificationInfo info)	Draws a justified string.
float	getFontScale()
FSFontMetrics	getFSFontMetrics(FontContext fc, FSFont font, java.lang.String string)
float[]	getGlyphPositions(OutputDevice outputDevice, FSFont font, java.lang.String text)	This method gets glyph positions for purposes of selecting text.
java.lang.Object	getRenderingHints()	If anti-alias text is enabled, the value from RenderingHints to use for AA smoothing in Java2D.
int	getSmoothingLevel()
int	getWidth(FontContext fc, FSFont font, java.lang.String string)	Rarely need to use this method directly.
private int	getWidthFast(FontContext fc, java.awt.Font awtFont, java.lang.String string)
private int	getWidthSlow(FontContext fc, java.util.List<java.awt.Font> fonts, java.lang.String string)	This method divides the string up into font runs, then measures each font run, adding it to the total.
void	setFontScale(float scale)
void	setRenderingHints(java.lang.Object renderingHints)	If anti-alias text is enabled, the value from RenderingHints to use for AA smoothing in Java2D.
void	setSmoothingLevel(int level)
void	setSmoothingThreshold(float fontsize)	Set the smoothing threashold.
void	setup(FontContext context)
void	setup(FontContext fontContext, BidiReorderer bidiReorderer)

Methods inherited from class java.lang.Object

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

Field Detail

scale

protected float scale

threshold

protected float threshold

antiAliasRenderingHint

protected java.lang.Object antiAliasRenderingHint

fractionalFontMetricsHint

protected java.lang.Object fractionalFontMetricsHint

Constructor Detail

Java2DTextRenderer

public Java2DTextRenderer()

Method Detail

drawString

public void drawString(OutputDevice outputDevice,
                       java.lang.String string,
                       float x,
                       float y)

Specified by:

drawString in interface TextRenderer

drawString

public void drawString(OutputDevice outputDevice,
                       java.lang.String string,
                       float x,
                       float y,
                       JustificationInfo info)

Draws a justified string. TODO: Font fallback.

Specified by:

drawString in interface TextRenderer

adjustGlyphPositions

private void adjustGlyphPositions(java.lang.String string,
                                  JustificationInfo info,
                                  java.awt.font.GlyphVector vector)

setup

public void setup(FontContext fontContext,
                  BidiReorderer bidiReorderer)

Parameters:

bidiReorderer -

setFontScale

public void setFontScale(float scale)

Specified by:

setFontScale in interface TextRenderer

setSmoothingThreshold

public void setSmoothingThreshold(float fontsize)

Description copied from interface: TextRenderer

Set the smoothing threashold. This is a font size above which all text will be anti-aliased. Text below this size will not be antialiased. Set to -1 for no antialiasing. Set to 0 for all antialising. Else, set to the threshold font size. does not take font scaling into account.

Specified by:

setSmoothingThreshold in interface TextRenderer

setSmoothingLevel

public void setSmoothingLevel(int level)

Specified by:

setSmoothingLevel in interface TextRenderer

Parameters:

level - no-op

getFSFontMetrics

public FSFontMetrics getFSFontMetrics(FontContext fc,
                                      FSFont font,
                                      java.lang.String string)

Specified by:

getFSFontMetrics in interface TextRenderer

canDisplayWithFont

private boolean canDisplayWithFont(java.lang.String str,
                                   java.awt.Font fnt)

getWidthFast

private int getWidthFast(FontContext fc,
                         java.awt.Font awtFont,
                         java.lang.String string)

divideIntoFontRuns

private java.util.List<Java2DTextRenderer.FontRun> divideIntoFontRuns(java.util.List<java.awt.Font> fonts,
                                                                      java.lang.String string)

getWidthSlow

private int getWidthSlow(FontContext fc,
                         java.util.List<java.awt.Font> fonts,
                         java.lang.String string)

This method divides the string up into font runs, then measures each font run, adding it to the total. We do this, rather than get the width of each character, in case kerning is enabled and it also may be faster.

getWidth

public int getWidth(FontContext fc,
                    FSFont font,
                    java.lang.String string)

Description copied from interface: TextRenderer

Rarely need to use this method directly. Instead favor Breaker static method instead.

Specified by:

getWidth in interface TextRenderer

getFontScale

public float getFontScale()

Specified by:

getFontScale in interface TextRenderer

getSmoothingLevel

public int getSmoothingLevel()

Specified by:

getSmoothingLevel in interface TextRenderer

getRenderingHints

public java.lang.Object getRenderingHints()

If anti-alias text is enabled, the value from RenderingHints to use for AA smoothing in Java2D. Defaults to RenderingHints.VALUE_TEXT_ANTIALIAS_ON.

Returns:

Current AA rendering hint

setRenderingHints

public void setRenderingHints(java.lang.Object renderingHints)

If anti-alias text is enabled, the value from RenderingHints to use for AA smoothing in Java2D. Defaults to RenderingHints.VALUE_TEXT_ANTIALIAS_ON.

Parameters:

renderingHints - rendering hint for AA smoothing in Java2D

getGlyphPositions

public float[] getGlyphPositions(OutputDevice outputDevice,
                                 FSFont font,
                                 java.lang.String text)

This method gets glyph positions for purposes of selecting text. WE are not too worried about selecting text at this point so we just use the first font available.

setup

public void setup(FontContext context)

Specified by:

setup in interface TextRenderer