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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.
*/
/* $Id$ */
package org.apache.fop.afp;
import java.awt.geom.AffineTransform;
/**
* AFP Unit converter
*/
public class AFPUnitConverter {
/** the AFP state */
private final AFPPaintingState paintingState;
/**
* Unit converter
*
* @param paintingState the AFP painting state
*/
public AFPUnitConverter(AFPPaintingState paintingState) {
this.paintingState = paintingState;
}
/**
* Converts millipoints to units
*
* @param srcPts source points
* @param dstPts destination points
* @return transformed points
*/
public int[] mpts2units(float[] srcPts, float[] dstPts) {
return transformPoints(srcPts, dstPts, true);
}
/**
* Converts points to units
*
* @param srcPts source points
* @param dstPts destination points
* @return transformed points
*/
public int[] pts2units(float[] srcPts, float[] dstPts) {
return transformPoints(srcPts, dstPts, false);
}
/**
* Converts millipoints to units
*
* @param srcPts source points
* @return transformed points
*/
public int[] mpts2units(float[] srcPts) {
return transformPoints(srcPts, null, true);
}
/**
* Converts points to units
*
* @param srcPts source points
* @return transformed points
*/
public int[] pts2units(float[] srcPts) {
return transformPoints(srcPts, null, false);
}
/**
* Converts point to unit
*
* @param pt point
* @return transformed point
*/
public float pt2units(float pt) {
return pt / ((float)AFPConstants.DPI_72 / paintingState.getResolution());
}
/**
* Converts millipoint to unit
*
* @param mpt millipoint
* @return transformed point
*/
public float mpt2units(float mpt) {
return mpt / ((float)AFPConstants.DPI_72_MPTS / paintingState.getResolution());
}
private int[] transformPoints(float[] srcPts, float[] dstPts, boolean milli) {
if (dstPts == null) {
dstPts = new float[srcPts.length];
}
AffineTransform at = paintingState.getData().getTransform();
at.transform(srcPts, 0, dstPts, 0, srcPts.length / 2);
int[] coords = new int[srcPts.length];
for (int i = 0; i < srcPts.length; i++) {
if (!milli) {
dstPts[i] *= 1000;
}
coords[i] = Math.round(dstPts[i]);
}
return coords;
}
}
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