1 /* 2 * Copyright (C) 2011 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 android.graphics.Matrix; 20 import android.graphics.PixelFormat; 21 import android.graphics.Rect; 22 import android.util.Slog; 23 import android.view.Surface; 24 import android.view.SurfaceSession; 25 26 /** 27 * Four black surfaces put together to make a black frame. 28 */ 29 public class BlackFrame { 30 class BlackSurface { 31 final int left; 32 final int top; 33 final Surface surface; 34 BlackSurface(SurfaceSession session, int layer, int l, int t, int r, int b)35 BlackSurface(SurfaceSession session, int layer, int l, int t, int r, int b) 36 throws Surface.OutOfResourcesException { 37 left = l; 38 top = t; 39 int w = r-l; 40 int h = b-t; 41 surface = new Surface(session, 0, "BlackSurface", 42 -1, w, h, PixelFormat.OPAQUE, Surface.FX_SURFACE_DIM); 43 if (WindowManagerService.SHOW_TRANSACTIONS || 44 WindowManagerService.SHOW_SURFACE_ALLOC) Slog.i(WindowManagerService.TAG, 45 " BLACK " + surface + ": CREATE layer=" + layer); 46 surface.setAlpha(1.0f); 47 surface.setLayer(layer); 48 } 49 setMatrix(Matrix matrix)50 void setMatrix(Matrix matrix) { 51 mTmpMatrix.setTranslate(left, top); 52 mTmpMatrix.postConcat(matrix); 53 mTmpMatrix.getValues(mTmpFloats); 54 surface.setPosition(mTmpFloats[Matrix.MTRANS_X], 55 mTmpFloats[Matrix.MTRANS_Y]); 56 surface.setMatrix( 57 mTmpFloats[Matrix.MSCALE_X], mTmpFloats[Matrix.MSKEW_Y], 58 mTmpFloats[Matrix.MSKEW_X], mTmpFloats[Matrix.MSCALE_Y]); 59 if (false) { 60 Slog.i(WindowManagerService.TAG, "Black Surface @ (" + left + "," + top + "): (" 61 + mTmpFloats[Matrix.MTRANS_X] + "," 62 + mTmpFloats[Matrix.MTRANS_Y] + ") matrix=[" 63 + mTmpFloats[Matrix.MSCALE_X] + "," 64 + mTmpFloats[Matrix.MSCALE_Y] + "][" 65 + mTmpFloats[Matrix.MSKEW_X] + "," 66 + mTmpFloats[Matrix.MSKEW_Y] + "]"); 67 } 68 } 69 clearMatrix()70 void clearMatrix() { 71 surface.setMatrix(1, 0, 0, 1); 72 } 73 } 74 75 final Matrix mTmpMatrix = new Matrix(); 76 final float[] mTmpFloats = new float[9]; 77 final BlackSurface[] mBlackSurfaces = new BlackSurface[4]; 78 BlackFrame(SurfaceSession session, Rect outer, Rect inner, int layer)79 public BlackFrame(SurfaceSession session, Rect outer, Rect inner, 80 int layer) throws Surface.OutOfResourcesException { 81 boolean success = false; 82 83 try { 84 if (outer.top < inner.top) { 85 mBlackSurfaces[0] = new BlackSurface(session, layer, 86 outer.left, outer.top, inner.right, inner.top); 87 } 88 if (outer.left < inner.left) { 89 mBlackSurfaces[1] = new BlackSurface(session, layer, 90 outer.left, inner.top, inner.left, outer.bottom); 91 } 92 if (outer.bottom > inner.bottom) { 93 mBlackSurfaces[2] = new BlackSurface(session, layer, 94 inner.left, inner.bottom, outer.right, outer.bottom); 95 } 96 if (outer.right > inner.right) { 97 mBlackSurfaces[3] = new BlackSurface(session, layer, 98 inner.right, outer.top, outer.right, inner.bottom); 99 } 100 success = true; 101 } finally { 102 if (!success) { 103 kill(); 104 } 105 } 106 } 107 kill()108 public void kill() { 109 if (mBlackSurfaces != null) { 110 for (int i=0; i<mBlackSurfaces.length; i++) { 111 if (mBlackSurfaces[i] != null) { 112 if (WindowManagerService.SHOW_TRANSACTIONS || 113 WindowManagerService.SHOW_SURFACE_ALLOC) Slog.i( 114 WindowManagerService.TAG, 115 " BLACK " + mBlackSurfaces[i].surface + ": DESTROY"); 116 mBlackSurfaces[i].surface.destroy(); 117 mBlackSurfaces[i] = null; 118 } 119 } 120 } 121 } 122 hide()123 public void hide() { 124 if (mBlackSurfaces != null) { 125 for (int i=0; i<mBlackSurfaces.length; i++) { 126 if (mBlackSurfaces[i] != null) { 127 mBlackSurfaces[i].surface.hide(); 128 } 129 } 130 } 131 } 132 setMatrix(Matrix matrix)133 public void setMatrix(Matrix matrix) { 134 for (int i=0; i<mBlackSurfaces.length; i++) { 135 if (mBlackSurfaces[i] != null) { 136 mBlackSurfaces[i].setMatrix(matrix); 137 } 138 } 139 } 140 clearMatrix()141 public void clearMatrix() { 142 for (int i=0; i<mBlackSurfaces.length; i++) { 143 if (mBlackSurfaces[i] != null) { 144 mBlackSurfaces[i].clearMatrix(); 145 } 146 } 147 } 148 } 149