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Diffstat (limited to 'src/java/org/apache/fop/util/UnitConv.java')
-rw-r--r-- | src/java/org/apache/fop/util/UnitConv.java | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/src/java/org/apache/fop/util/UnitConv.java b/src/java/org/apache/fop/util/UnitConv.java new file mode 100644 index 000000000..0c16cdc3f --- /dev/null +++ b/src/java/org/apache/fop/util/UnitConv.java @@ -0,0 +1,118 @@ +/* + * 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); + } + +} |