Adrian Roos | 4d18a2e | 2017-12-19 19:08:05 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 The Android Open Source Project |
| 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.android.server.wm; |
| 18 | |
| 19 | import static android.view.SurfaceControl.HIDDEN; |
| 20 | |
| 21 | import android.graphics.Rect; |
| 22 | import android.view.SurfaceControl; |
| 23 | |
| 24 | import java.util.function.Supplier; |
| 25 | |
| 26 | /** |
| 27 | * Manages a set of {@link SurfaceControl}s to draw a black letterbox between an |
| 28 | * outer rect and an inner rect. |
| 29 | */ |
| 30 | public class Letterbox { |
| 31 | |
| 32 | private static final Rect EMPTY_RECT = new Rect(); |
| 33 | |
| 34 | private final Supplier<SurfaceControl.Builder> mFactory; |
| 35 | private final Rect mOuter = new Rect(); |
| 36 | private final Rect mInner = new Rect(); |
| 37 | private final LetterboxSurface mTop = new LetterboxSurface("top"); |
| 38 | private final LetterboxSurface mLeft = new LetterboxSurface("left"); |
| 39 | private final LetterboxSurface mBottom = new LetterboxSurface("bottom"); |
| 40 | private final LetterboxSurface mRight = new LetterboxSurface("right"); |
| 41 | |
| 42 | /** |
| 43 | * Constructs a Letterbox. |
| 44 | * |
| 45 | * @param surfaceControlFactory a factory for creating the managed {@link SurfaceControl}s |
| 46 | */ |
| 47 | public Letterbox(Supplier<SurfaceControl.Builder> surfaceControlFactory) { |
| 48 | mFactory = surfaceControlFactory; |
| 49 | } |
| 50 | |
| 51 | /** |
Adrian Roos | 23df3a3 | 2018-03-15 15:41:13 +0100 | [diff] [blame] | 52 | * Lays out the letterbox, such that the area between the outer and inner |
Adrian Roos | 4d18a2e | 2017-12-19 19:08:05 +0100 | [diff] [blame] | 53 | * frames will be covered by black color surfaces. |
| 54 | * |
Adrian Roos | 23df3a3 | 2018-03-15 15:41:13 +0100 | [diff] [blame] | 55 | * The caller must use {@link #applySurfaceChanges} to apply the new layout to the surface. |
| 56 | * |
Adrian Roos | 4d18a2e | 2017-12-19 19:08:05 +0100 | [diff] [blame] | 57 | * @param outer the outer frame of the letterbox (this frame will be black, except the area |
| 58 | * that intersects with the {code inner} frame). |
| 59 | * @param inner the inner frame of the letterbox (this frame will be clear) |
| 60 | */ |
Adrian Roos | 23df3a3 | 2018-03-15 15:41:13 +0100 | [diff] [blame] | 61 | public void layout(Rect outer, Rect inner) { |
Adrian Roos | 4d18a2e | 2017-12-19 19:08:05 +0100 | [diff] [blame] | 62 | mOuter.set(outer); |
| 63 | mInner.set(inner); |
| 64 | |
Adrian Roos | 23df3a3 | 2018-03-15 15:41:13 +0100 | [diff] [blame] | 65 | mTop.layout(outer.left, outer.top, inner.right, inner.top); |
| 66 | mLeft.layout(outer.left, inner.top, inner.left, outer.bottom); |
| 67 | mBottom.layout(inner.left, inner.bottom, outer.right, outer.bottom); |
| 68 | mRight.layout(inner.right, outer.top, outer.right, inner.bottom); |
Adrian Roos | 4d18a2e | 2017-12-19 19:08:05 +0100 | [diff] [blame] | 69 | } |
| 70 | |
Adrian Roos | 23df3a3 | 2018-03-15 15:41:13 +0100 | [diff] [blame] | 71 | |
Adrian Roos | 4d18a2e | 2017-12-19 19:08:05 +0100 | [diff] [blame] | 72 | /** |
Adrian Roos | 20e0789 | 2018-02-23 19:12:01 +0100 | [diff] [blame] | 73 | * Gets the insets between the outer and inner rects. |
| 74 | */ |
| 75 | public Rect getInsets() { |
| 76 | return new Rect( |
| 77 | mLeft.getWidth(), |
| 78 | mTop.getHeight(), |
| 79 | mRight.getWidth(), |
| 80 | mBottom.getHeight()); |
| 81 | } |
| 82 | |
| 83 | /** |
Adrian Roos | 23df3a3 | 2018-03-15 15:41:13 +0100 | [diff] [blame] | 84 | * Returns true if any part of the letterbox overlaps with the given {@code rect}. |
| 85 | */ |
| 86 | public boolean isOverlappingWith(Rect rect) { |
| 87 | return mTop.isOverlappingWith(rect) || mLeft.isOverlappingWith(rect) |
| 88 | || mBottom.isOverlappingWith(rect) || mRight.isOverlappingWith(rect); |
| 89 | } |
| 90 | |
| 91 | /** |
Adrian Roos | 4d18a2e | 2017-12-19 19:08:05 +0100 | [diff] [blame] | 92 | * Hides the letterbox. |
| 93 | * |
Adrian Roos | 23df3a3 | 2018-03-15 15:41:13 +0100 | [diff] [blame] | 94 | * The caller must use {@link #applySurfaceChanges} to apply the new layout to the surface. |
Adrian Roos | 4d18a2e | 2017-12-19 19:08:05 +0100 | [diff] [blame] | 95 | */ |
Adrian Roos | 23df3a3 | 2018-03-15 15:41:13 +0100 | [diff] [blame] | 96 | public void hide() { |
| 97 | layout(EMPTY_RECT, EMPTY_RECT); |
Adrian Roos | 4d18a2e | 2017-12-19 19:08:05 +0100 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Destroys the managed {@link SurfaceControl}s. |
| 102 | */ |
| 103 | public void destroy() { |
| 104 | mOuter.setEmpty(); |
| 105 | mInner.setEmpty(); |
| 106 | |
| 107 | mTop.destroy(); |
| 108 | mLeft.destroy(); |
| 109 | mBottom.destroy(); |
| 110 | mRight.destroy(); |
| 111 | } |
| 112 | |
Adrian Roos | 23df3a3 | 2018-03-15 15:41:13 +0100 | [diff] [blame] | 113 | /** Returns whether a call to {@link #applySurfaceChanges} would change the surface. */ |
| 114 | public boolean needsApplySurfaceChanges() { |
| 115 | return mTop.needsApplySurfaceChanges() |
| 116 | || mLeft.needsApplySurfaceChanges() |
| 117 | || mBottom.needsApplySurfaceChanges() |
| 118 | || mRight.needsApplySurfaceChanges(); |
| 119 | } |
| 120 | |
| 121 | public void applySurfaceChanges(SurfaceControl.Transaction t) { |
| 122 | mTop.applySurfaceChanges(t); |
| 123 | mLeft.applySurfaceChanges(t); |
| 124 | mBottom.applySurfaceChanges(t); |
| 125 | mRight.applySurfaceChanges(t); |
| 126 | } |
| 127 | |
Adrian Roos | 4d18a2e | 2017-12-19 19:08:05 +0100 | [diff] [blame] | 128 | private class LetterboxSurface { |
| 129 | |
| 130 | private final String mType; |
| 131 | private SurfaceControl mSurface; |
| 132 | |
Adrian Roos | 23df3a3 | 2018-03-15 15:41:13 +0100 | [diff] [blame] | 133 | private final Rect mSurfaceFrame = new Rect(); |
| 134 | private final Rect mLayoutFrame = new Rect(); |
Adrian Roos | 4d18a2e | 2017-12-19 19:08:05 +0100 | [diff] [blame] | 135 | |
| 136 | public LetterboxSurface(String type) { |
| 137 | mType = type; |
| 138 | } |
| 139 | |
Adrian Roos | 23df3a3 | 2018-03-15 15:41:13 +0100 | [diff] [blame] | 140 | public void layout(int left, int top, int right, int bottom) { |
| 141 | if (mLayoutFrame.left == left && mLayoutFrame.top == top |
| 142 | && mLayoutFrame.right == right && mLayoutFrame.bottom == bottom) { |
Adrian Roos | 4d18a2e | 2017-12-19 19:08:05 +0100 | [diff] [blame] | 143 | // Nothing changed. |
| 144 | return; |
| 145 | } |
Adrian Roos | 23df3a3 | 2018-03-15 15:41:13 +0100 | [diff] [blame] | 146 | mLayoutFrame.set(left, top, right, bottom); |
Adrian Roos | 4d18a2e | 2017-12-19 19:08:05 +0100 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | private void createSurface() { |
| 150 | mSurface = mFactory.get().setName("Letterbox - " + mType) |
| 151 | .setFlags(HIDDEN).setColorLayer(true).build(); |
| 152 | mSurface.setLayer(-1); |
| 153 | mSurface.setColor(new float[]{0, 0, 0}); |
| 154 | } |
| 155 | |
| 156 | public void destroy() { |
| 157 | if (mSurface != null) { |
| 158 | mSurface.destroy(); |
| 159 | mSurface = null; |
| 160 | } |
| 161 | } |
Adrian Roos | 20e0789 | 2018-02-23 19:12:01 +0100 | [diff] [blame] | 162 | |
| 163 | public int getWidth() { |
Adrian Roos | 23df3a3 | 2018-03-15 15:41:13 +0100 | [diff] [blame] | 164 | return Math.max(0, mLayoutFrame.width()); |
Adrian Roos | 20e0789 | 2018-02-23 19:12:01 +0100 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | public int getHeight() { |
Adrian Roos | 23df3a3 | 2018-03-15 15:41:13 +0100 | [diff] [blame] | 168 | return Math.max(0, mLayoutFrame.height()); |
| 169 | } |
| 170 | |
| 171 | public boolean isOverlappingWith(Rect rect) { |
| 172 | if (getWidth() <= 0 || getHeight() <= 0) { |
| 173 | return false; |
| 174 | } |
| 175 | return Rect.intersects(rect, mLayoutFrame); |
| 176 | } |
| 177 | |
| 178 | public void applySurfaceChanges(SurfaceControl.Transaction t) { |
| 179 | if (mSurfaceFrame.equals(mLayoutFrame)) { |
| 180 | // Nothing changed. |
| 181 | return; |
| 182 | } |
| 183 | mSurfaceFrame.set(mLayoutFrame); |
| 184 | if (!mSurfaceFrame.isEmpty()) { |
| 185 | if (mSurface == null) { |
| 186 | createSurface(); |
| 187 | } |
| 188 | t.setPosition(mSurface, mSurfaceFrame.left, mSurfaceFrame.top); |
| 189 | t.setSize(mSurface, mSurfaceFrame.width(), mSurfaceFrame.height()); |
| 190 | t.show(mSurface); |
| 191 | } else if (mSurface != null) { |
| 192 | t.hide(mSurface); |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | public boolean needsApplySurfaceChanges() { |
| 197 | return !mSurfaceFrame.equals(mLayoutFrame); |
Adrian Roos | 20e0789 | 2018-02-23 19:12:01 +0100 | [diff] [blame] | 198 | } |
Adrian Roos | 4d18a2e | 2017-12-19 19:08:05 +0100 | [diff] [blame] | 199 | } |
| 200 | } |