/*
* Copyright (c) 2001-2006 JGoodies Karsten Lentzsch. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* o Neither the name of JGoodies Karsten Lentzsch nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.pushingpixels.flamingo.internal.utils;
import java.awt.*;
import java.awt.print.PrinterGraphics;
import java.util.*;
/**
* Utilities to install desktop rendering hints for correctly rasterizing texts.
*
* @author Kirill Grouchnikov
*/
public class RenderingUtils {
/**
* Desktop property name that points to a collection of rendering hints. See
* <a href="http://java.sun.com/javase/6/docs/api/java/awt/doc-files/DesktopProperties.html"
* >documentation</a> for more details.
*/
private static final String PROP_DESKTOPHINTS = "awt.font.desktophints";
/**
* Installs desktop hints on the specified graphics context.
*
* @param g2
* Graphics context.
* @return Map of old rendering hints.
*/
public static Map installDesktopHints(Graphics2D g2) {
Map oldRenderingHints = null;
Map desktopHints = desktopHints(g2);
if (desktopHints != null && !desktopHints.isEmpty()) {
oldRenderingHints = new HashMap(desktopHints.size());
RenderingHints.Key key;
for (Iterator i = desktopHints.keySet().iterator(); i.hasNext();) {
key = (RenderingHints.Key) i.next();
oldRenderingHints.put(key, g2.getRenderingHint(key));
}
g2.addRenderingHints(desktopHints);
}
return oldRenderingHints;
}
/**
* Returns the desktop hints for the specified graphics context.
*
* @param g2
* Graphics context.
* @return The desktop hints for the specified graphics context.
*/
private static Map desktopHints(Graphics2D g2) {
if (isPrinting(g2)) {
return null;
}
Toolkit toolkit = Toolkit.getDefaultToolkit();
GraphicsDevice device = g2.getDeviceConfiguration().getDevice();
Map desktopHints = (Map) toolkit.getDesktopProperty(PROP_DESKTOPHINTS
+ '.' + device.getIDstring());
if (desktopHints == null) {
desktopHints = (Map) toolkit.getDesktopProperty(PROP_DESKTOPHINTS);
}
// It is possible to get a non-empty map but with disabled AA.
if (desktopHints != null) {
Object aaHint = desktopHints
.get(RenderingHints.KEY_TEXT_ANTIALIASING);
if ((aaHint == RenderingHints.VALUE_TEXT_ANTIALIAS_OFF)
|| (aaHint == RenderingHints.VALUE_TEXT_ANTIALIAS_DEFAULT)) {
desktopHints = null;
}
}
return desktopHints;
}
/**
* Checks whether the specified graphics context is a print context.
*
* @param g
* Graphics context.
* @return <code>true</code> if the specified graphics context is a print
* context.
*/
private static boolean isPrinting(Graphics g) {
return g instanceof PrintGraphics || g instanceof PrinterGraphics;
}
}