| /* |
| * 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. |
| */ |
| package org.apache.commons.imaging; |
| |
| public class PixelDensity { |
| private double horizontalDensity; |
| private double verticalDensity; |
| /// One-tenth of a millimetre units. |
| private int unitLength; |
| |
| private PixelDensity(double horizontalDensity, double verticalDensity, int unitLength) { |
| this.horizontalDensity = horizontalDensity; |
| this.verticalDensity = verticalDensity; |
| this.unitLength = unitLength; |
| } |
| |
| public static PixelDensity createUnitless(double x, double y) { |
| return new PixelDensity(x, y, 0); |
| } |
| |
| public static PixelDensity createFromPixelsPerInch(double x, double y) { |
| return new PixelDensity(x, y, 254); |
| } |
| |
| public static PixelDensity createFromPixelsPerMetre(double x, double y) { |
| return new PixelDensity(x, y, 10000); |
| } |
| |
| public static PixelDensity createFromPixelsPerCentimetre(double x, double y) { |
| return new PixelDensity(x, y, 100); |
| } |
| |
| public boolean isUnitless() { |
| return unitLength == 0; |
| } |
| |
| public boolean isInInches() { |
| return unitLength == 254; |
| } |
| |
| public boolean isInCentimetres() { |
| return unitLength == 100; |
| } |
| |
| public boolean isInMetres() { |
| return unitLength == 10000; |
| } |
| |
| public double getRawHorizontalDensity() { |
| return horizontalDensity; |
| } |
| |
| public double getRawVerticalDensity() { |
| return verticalDensity; |
| } |
| |
| public double horizontalDensityInches() { |
| if (isInInches()) { |
| return horizontalDensity; |
| } else { |
| return horizontalDensity * 254 / unitLength; |
| } |
| } |
| |
| public double verticalDensityInches() { |
| if (isInInches()) { |
| return verticalDensity; |
| } else { |
| return verticalDensity * 254 / unitLength; |
| } |
| } |
| |
| public double horizontalDensityMetres() { |
| if (isInMetres()) { |
| return horizontalDensity; |
| } else { |
| return horizontalDensity * 10000 / unitLength; |
| } |
| } |
| |
| public double verticalDensityMetres() { |
| if (isInMetres()) { |
| return verticalDensity; |
| } else { |
| return verticalDensity * 10000 / unitLength; |
| } |
| } |
| |
| public double horizontalDensityCentimetres() { |
| if (isInCentimetres()) { |
| return horizontalDensity; |
| } else { |
| return horizontalDensity * 100 / unitLength; |
| } |
| } |
| |
| public double verticalDensityCentimetres() { |
| if (isInCentimetres()) { |
| return verticalDensity; |
| } else { |
| return verticalDensity * 100 / unitLength; |
| } |
| } |
| } |