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org.xhtmlrenderer.swing.Java2DTextRenderer Maven / Gradle / Ivy
/*
* {{{ header & license
* Copyright (c) 2004, 2005 Joshua Marinacci, Torbj?rn Gannholm
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* }}}
*/
package org.xhtmlrenderer.swing;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Toolkit;
import java.awt.font.GlyphVector;
import java.awt.geom.Point2D;
import java.util.Map;
import org.xhtmlrenderer.extend.FSGlyphVector;
import org.xhtmlrenderer.extend.FontContext;
import org.xhtmlrenderer.extend.OutputDevice;
import org.xhtmlrenderer.extend.TextRenderer;
import org.xhtmlrenderer.render.FSFont;
import org.xhtmlrenderer.render.FSFontMetrics;
import org.xhtmlrenderer.render.JustificationInfo;
import org.xhtmlrenderer.render.LineMetricsAdapter;
import org.xhtmlrenderer.util.Configuration;
/**
* Renders to a Graphics2D instance.
*
* @author Joshua Marinacci
* @author Torbjoern Gannholm
*/
public class Java2DTextRenderer implements TextRenderer {
protected float scale;
protected float threshold;
protected Object antiAliasRenderingHint;
public Java2DTextRenderer() {
scale = Configuration.valueAsFloat("xr.text.scale", 1.0f);
threshold = Configuration.valueAsFloat("xr.text.aa-fontsize-threshhold", 25);
Object dummy = new Object();
Object aaHint = Configuration.valueFromClassConstant("xr.text.aa-rendering-hint", dummy);
if (aaHint == dummy) {
try {
Map map;
// we should be able to look up the "recommended" AA settings (that correspond to the user's
// desktop preferences and machine capabilities
// see: http://java.sun.com/javase/6/docs/api/java/awt/doc-files/DesktopProperties.html
Toolkit tk = Toolkit.getDefaultToolkit();
map = (Map) (tk.getDesktopProperty("awt.font.desktophints"));
antiAliasRenderingHint = map.get(RenderingHints.KEY_TEXT_ANTIALIASING);
} catch (Exception e) {
// conceivably could get an exception in a webstart environment? not sure
antiAliasRenderingHint = RenderingHints.VALUE_TEXT_ANTIALIAS_ON;
}
} else {
antiAliasRenderingHint = aaHint;
}
}
/** {@inheritDoc} */
public void drawString(OutputDevice outputDevice, String string, float x, float y ) {
Object prevHint = null;
Graphics2D graphics = ((Java2DOutputDevice)outputDevice).getGraphics();
if ( graphics.getFont().getSize() > threshold ) {
prevHint = graphics.getRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING);
graphics.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, antiAliasRenderingHint );
}
graphics.drawString( string, (int)x, (int)y );
if ( graphics.getFont().getSize() > threshold ) {
graphics.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, prevHint );
}
}
public void drawString(
OutputDevice outputDevice, String string, float x, float y, JustificationInfo info) {
Object prevHint = null;
Graphics2D graphics = ((Java2DOutputDevice)outputDevice).getGraphics();
if ( graphics.getFont().getSize() > threshold ) {
prevHint = graphics.getRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING);
graphics.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, antiAliasRenderingHint );
}
GlyphVector vector = graphics.getFont().createGlyphVector(
graphics.getFontRenderContext(), string);
adjustGlyphPositions(string, info, vector);
graphics.drawGlyphVector(vector, x, y);
if ( graphics.getFont().getSize() > threshold ) {
graphics.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, prevHint );
}
}
private void adjustGlyphPositions(
String string, JustificationInfo info, GlyphVector vector) {
float adjust = 0.0f;
for (int i = 0; i < string.length(); i++) {
char c = string.charAt(i);
if (i != 0) {
Point2D point = vector.getGlyphPosition(i);
vector.setGlyphPosition(
i, new Point2D.Double(point.getX() + adjust, point.getY()));
}
if (c == ' ' || c == '\u00a0' || c == '\u3000') {
adjust += info.getSpaceAdjust();
} else {
adjust += info.getNonSpaceAdjust();
}
}
}
public void drawGlyphVector(OutputDevice outputDevice, FSGlyphVector fsGlyphVector, float x, float y ) {
Object prevHint = null;
Graphics2D graphics = ((Java2DOutputDevice)outputDevice).getGraphics();
if ( graphics.getFont().getSize() > threshold ) {
prevHint = graphics.getRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING);
graphics.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, antiAliasRenderingHint );
}
GlyphVector vector = ((AWTFSGlyphVector)fsGlyphVector).getGlyphVector();
graphics.drawGlyphVector(vector, (int)x, (int)y );
if ( graphics.getFont().getSize() > threshold ) {
graphics.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, prevHint );
}
}
/** {@inheritDoc} */
public void setup(FontContext fontContext) {
//Uu.p("setup graphics called");
((Java2DFontContext)fontContext).getGraphics().setRenderingHint(
RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_OFF );
}
public void setFontScale( float scale ) {
this.scale = scale;
}
public void setSmoothingThreshold( float fontsize ) {
threshold = fontsize;
}
public void setSmoothingLevel( int level ) { /* no-op */ }
public FSFontMetrics getFSFontMetrics(FontContext fc, FSFont font, String string ) {
Graphics2D graphics = ((Java2DFontContext)fc).getGraphics();
return new LineMetricsAdapter(
((AWTFSFont)font).getAWTFont().getLineMetrics(
string, graphics.getFontRenderContext()));
}
public int getWidth(FontContext fc, FSFont font, String string) {
Graphics2D graphics = ((Java2DFontContext)fc).getGraphics();
Font awtFont = ((AWTFSFont)font).getAWTFont();
return (int)Math.ceil(
graphics.getFontMetrics(awtFont).getStringBounds(string, graphics).getWidth());
}
public float getFontScale() {
return this.scale;
}
public int getSmoothingLevel() {
return 0;
}
/**
* If anti-alias text is enabled, the value from RenderingHints to use for AA smoothing in Java2D. Defaults to
* {@link java.awt.RenderingHints#VALUE_TEXT_ANTIALIAS_ON}.
*
* @return Current AA rendering hint
*/
public Object getRenderingHints() {
return antiAliasRenderingHint;
}
/**
* If anti-alias text is enabled, the value from RenderingHints to use for AA smoothing in Java2D. Defaults to
* {@link java.awt.RenderingHints#VALUE_TEXT_ANTIALIAS_ON}.
*
* @param renderingHints rendering hint for AA smoothing in Java2D
*/
public void setRenderingHints(Object renderingHints) {
this.antiAliasRenderingHint = renderingHints;
}
public float[] getGlyphPositions(OutputDevice outputDevice, FSFont font, String text) {
Object prevHint = null;
Graphics2D graphics = ((Java2DOutputDevice)outputDevice).getGraphics();
Font awtFont = ((AWTFSFont)font).getAWTFont();
if (awtFont.getSize() > threshold ) {
prevHint = graphics.getRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING);
graphics.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, antiAliasRenderingHint );
}
GlyphVector vector = awtFont.createGlyphVector(
graphics.getFontRenderContext(),
text);
float[] result = vector.getGlyphPositions(0, text.length() + 1, null);
if (awtFont.getSize() > threshold ) {
graphics.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, prevHint );
}
return result;
}
public Rectangle getGlyphBounds(OutputDevice outputDevice, FSFont font, FSGlyphVector fsGlyphVector, int index, float x, float y) {
Object prevHint = null;
Graphics2D graphics = ((Java2DOutputDevice)outputDevice).getGraphics();
Font awtFont = ((AWTFSFont)font).getAWTFont();
if (awtFont.getSize() > threshold ) {
prevHint = graphics.getRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING);
graphics.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, antiAliasRenderingHint );
}
GlyphVector vector = ((AWTFSGlyphVector)fsGlyphVector).getGlyphVector();
Rectangle result = vector.getGlyphPixelBounds(index, graphics.getFontRenderContext(), x, y);
if (awtFont.getSize() > threshold ) {
graphics.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, prevHint );
}
return result;
}
public float[] getGlyphPositions(OutputDevice outputDevice, FSFont font, FSGlyphVector fsGlyphVector) {
Object prevHint = null;
Graphics2D graphics = ((Java2DOutputDevice)outputDevice).getGraphics();
Font awtFont = ((AWTFSFont)font).getAWTFont();
if (awtFont.getSize() > threshold ) {
prevHint = graphics.getRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING);
graphics.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, antiAliasRenderingHint );
}
GlyphVector vector = ((AWTFSGlyphVector)fsGlyphVector).getGlyphVector();
float[] result = vector.getGlyphPositions(0, vector.getNumGlyphs() + 1, null);
if (awtFont.getSize() > threshold ) {
graphics.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, prevHint );
}
return result;
}
public FSGlyphVector getGlyphVector(OutputDevice outputDevice, FSFont font, String text) {
Object prevHint = null;
Graphics2D graphics = ((Java2DOutputDevice)outputDevice).getGraphics();
Font awtFont = ((AWTFSFont)font).getAWTFont();
if (awtFont.getSize() > threshold ) {
prevHint = graphics.getRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING);
graphics.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, antiAliasRenderingHint );
}
GlyphVector vector = awtFont.createGlyphVector(
graphics.getFontRenderContext(),
text);
if (awtFont.getSize() > threshold ) {
graphics.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, prevHint );
}
return new AWTFSGlyphVector(vector);
}
}
