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+/*
+ * Copyright 2006 The Apache Software Foundation.
+ *
+ * Licensed 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: FixedLength.java 279656 2005-09-08 22:06:48Z pietsch $ */
+
+package org.apache.fop.util;
+
+/**
+ * Utility class for unit conversions.
+ */
+public final class UnitConv {
+
+ /** conversion factory from millimeters to inches. */
+ public static final float IN2MM = 25.4f;
+
+ /** conversion factory from centimeters to inches. */
+ public static final float IN2CM = 2.54f;
+
+ /** conversion factory from inches to points. */
+ public static final int IN2PT = 72;
+
+ /**
+ * Converts millimeters (mm) to points (pt)
+ * @param mm the value in mm
+ * @return the value in pt
+ */
+ public static double mm2pt(double mm) {
+ return mm * IN2PT / IN2MM;
+ }
+
+ /**
+ * Converts millimeters (mm) to millipoints (mpt)
+ * @param mm the value in mm
+ * @return the value in mpt
+ */
+ public static double mm2mpt(double mm) {
+ return mm * 1000 * IN2PT / IN2MM;
+ }
+
+ /**
+ * Converts points (pt) to millimeters (mm)
+ * @param pt the value in pt
+ * @return the value in mm
+ */
+ public static double pt2mm(double pt) {
+ return pt * IN2MM / IN2PT;
+ }
+
+ /**
+ * Converts millimeters (mm) to inches (in)
+ * @param mm the value in mm
+ * @return the value in inches
+ */
+ public static double mm2in(double mm) {
+ return mm / IN2MM;
+ }
+
+ /**
+ * Converts inches (in) to millimeters (mm)
+ * @param in the value in inches
+ * @return the value in mm
+ */
+ public static double in2mm(double in) {
+ return in * IN2MM;
+ }
+
+ /**
+ * Converts inches (in) to millipoints (mpt)
+ * @param in the value in inches
+ * @return the value in mpt
+ */
+ public static double in2mpt(double in) {
+ return in * IN2PT * 1000;
+ }
+
+ /**
+ * Converts millipoints (mpt) to inches (in)
+ * @param mpt the value in mpt
+ * @return the value in inches
+ */
+ public static double mpt2in(double mpt) {
+ return mpt / IN2PT / 1000;
+ }
+
+ /**
+ * Converts millimeters (mm) to pixels (px)
+ * @param mm the value in mm
+ * @param resolution the resolution in dpi (dots per inch)
+ * @return the value in pixels
+ */
+ public static int mm2px(double mm, int resolution) {
+ return (int)Math.round(mm2in(mm) * resolution);
+ }
+
+ /**
+ * Converts millipoints (mpt) to pixels (px)
+ * @param mpt the value in mpt
+ * @param resolution the resolution in dpi (dots per inch)
+ * @return the value in pixels
+ */
+ public static int mpt2px(double mpt, int resolution) {
+ return (int)Math.round(mpt2in(mpt) * resolution);
+ }
+
+}