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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @author Ilya S. Okomin
* @version $Revision$
*/
package java.awt.font;
import java.awt.geom.AffineTransform;
/**
* The FontRenderContext class contains the information
* about text measurement. Anti-aliasing and fractional-metrics
* modes are defined by an application and affect the size of
* a character.
*/
public class FontRenderContext {
// Affine transform of this mode
/** The transform. */
private AffineTransform transform;
// Is the anti-aliased mode used
/** The anti aliased. */
private boolean fAntiAliased;
// Is the fractional metrics used
/** The fractional metrics. */
private boolean fFractionalMetrics;
/**
* Instantiates a new FontRenderContext object with the specified
* AffineTransform, anti-aliasing and fractional metrics flags.
*
* @param trans the AffineTransform.
* @param antiAliased the anti-aliasing flag.
* @param usesFractionalMetrics the fractional metrics flag.
*/
public FontRenderContext(AffineTransform trans, boolean antiAliased,
boolean usesFractionalMetrics) {
if (trans != null){
transform = new AffineTransform(trans);
}
fAntiAliased = antiAliased;
fFractionalMetrics = usesFractionalMetrics;
}
/**
* Instantiates a new FontRenderContext object.
*/
protected FontRenderContext() {
}
/**
* Compares the specified Object with current FontRenderContext object.
*
* @param obj the Object to be compared.
*
* @return true, if the specified Object is equal to current
* FontRenderContext object.
*/
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (obj != null) {
try {
return equals((FontRenderContext) obj);
} catch (ClassCastException e) {
return false;
}
}
return false;
}
/**
* Gets the transform which is used for scaling typographical points
* to pixels in this FontRenderContext.
*
* @return the AffineTransform which is used for scaling typographical
* points to pixels in this FontRenderContext.
*/
public AffineTransform getTransform() {
if (transform != null){
return new AffineTransform(transform);
}
return new AffineTransform();
}
/**
* Compares the specified FontRenderContext object with current
* FontRenderContext.
*
* @param frc the FontRenderContext object to be compared.
*
* @return true, if the specified FontRenderContext object is
* equal to current FontRenderContext.
*/
public boolean equals(FontRenderContext frc) {
if (this == frc){
return true;
}
if (frc == null){
return false;
}
if (!frc.getTransform().equals(this.getTransform()) &&
!frc.isAntiAliased() == this.fAntiAliased &&
!frc.usesFractionalMetrics() == this.fFractionalMetrics){
return false;
}
return true;
}
/**
* Returns true if the text fractional metrics are used in
* this FontRenderContext.
*
* @return true, if the text fractional metrics are used in
* this FontRenderContext, false otherwise.
*/
public boolean usesFractionalMetrics() {
return this.fFractionalMetrics;
}
/**
* Returns true if anti-aliasing is used in this FontRenderContext.
*
* @return true, if is anti-aliasing is used in this FontRenderContext,
* false otherwise.
*/
public boolean isAntiAliased() {
return this.fAntiAliased;
}
/**
* Returns hash code of the FontRenderContext object.
*
* @return the hash code of the FontRenderContext object.
*/
@Override
public int hashCode() {
return this.getTransform().hashCode() ^
new Boolean(this.fFractionalMetrics).hashCode() ^
new Boolean(this.fAntiAliased).hashCode();
}
}
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