1 /******************************************************************************* 2 * Copyright 2011 See AUTHORS file. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 ******************************************************************************/ 16 17 package com.badlogic.gdx.utils.viewport; 18 19 import com.badlogic.gdx.Gdx; 20 import com.badlogic.gdx.graphics.Camera; 21 import com.badlogic.gdx.graphics.OrthographicCamera; 22 import com.badlogic.gdx.math.Vector2; 23 import com.badlogic.gdx.utils.Scaling; 24 25 /** A viewport that scales the world using {@link Scaling}. 26 * <p> 27 * {@link Scaling#fit} keeps the aspect ratio by scaling the world up to fit the screen, adding black bars (letterboxing) for the 28 * remaining space. 29 * <p> 30 * {@link Scaling#fill} keeps the aspect ratio by scaling the world up to take the whole screen (some of the world may be off 31 * screen). 32 * <p> 33 * {@link Scaling#stretch} does not keep the aspect ratio, the world is scaled to take the whole screen. 34 * <p> 35 * {@link Scaling#none} keeps the aspect ratio by using a fixed size world (the world may not fill the screen or some of the world 36 * may be off screen). 37 * @author Daniel Holderbaum 38 * @author Nathan Sweet */ 39 public class ScalingViewport extends Viewport { 40 private Scaling scaling; 41 42 /** Creates a new viewport using a new {@link OrthographicCamera}. */ 43 public ScalingViewport (Scaling scaling, float worldWidth, float worldHeight) { 44 this(scaling, worldWidth, worldHeight, new OrthographicCamera()); 45 } 46 47 public ScalingViewport (Scaling scaling, float worldWidth, float worldHeight, Camera camera) { 48 this.scaling = scaling; 49 setWorldSize(worldWidth, worldHeight); 50 setCamera(camera); 51 } 52 53 @Override 54 public void update (int screenWidth, int screenHeight, boolean centerCamera) { 55 Vector2 scaled = scaling.apply(getWorldWidth(), getWorldHeight(), screenWidth, screenHeight); 56 int viewportWidth = Math.round(scaled.x); 57 int viewportHeight = Math.round(scaled.y); 58 59 // Center. 60 setScreenBounds((screenWidth - viewportWidth) / 2, (screenHeight - viewportHeight) / 2, viewportWidth, viewportHeight); 61 62 apply(centerCamera); 63 } 64 65 public Scaling getScaling () { 66 return scaling; 67 } 68 69 public void setScaling (Scaling scaling) { 70 this.scaling = scaling; 71 } 72 } 73
