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 17package com.android.server.wm; 18 19import java.io.PrintWriter; 20 21import android.graphics.Matrix; 22import android.graphics.PixelFormat; 23import android.graphics.Rect; 24import android.util.Slog; 25import android.view.Surface; 26import android.view.SurfaceSession; 27 28/** 29 * Four black surfaces put together to make a black frame. 30 */ 31public class BlackFrame { 32 class BlackSurface { 33 final int left; 34 final int top; 35 final int layer; 36 final Surface surface; 37 38 BlackSurface(SurfaceSession session, int layer, int l, int t, int r, int b, int layerStack) 39 throws Surface.OutOfResourcesException { 40 left = l; 41 top = t; 42 this.layer = layer; 43 int w = r-l; 44 int h = b-t; 45 if (WindowManagerService.DEBUG_SURFACE_TRACE) { 46 surface = new WindowStateAnimator.SurfaceTrace(session, "BlackSurface(" 47 + l + ", " + t + ")", 48 w, h, PixelFormat.OPAQUE, Surface.FX_SURFACE_DIM | Surface.HIDDEN); 49 } else { 50 surface = new Surface(session, "BlackSurface", 51 w, h, PixelFormat.OPAQUE, Surface.FX_SURFACE_DIM | Surface.HIDDEN); 52 } 53 surface.setAlpha(1); 54 surface.setLayerStack(layerStack); 55 surface.setLayer(layer); 56 surface.show(); 57 if (WindowManagerService.SHOW_TRANSACTIONS || 58 WindowManagerService.SHOW_SURFACE_ALLOC) Slog.i(WindowManagerService.TAG, 59 " BLACK " + surface + ": CREATE layer=" + layer); 60 } 61 62 void setMatrix(Matrix matrix) { 63 mTmpMatrix.setTranslate(left, top); 64 mTmpMatrix.postConcat(matrix); 65 mTmpMatrix.getValues(mTmpFloats); 66 surface.setPosition(mTmpFloats[Matrix.MTRANS_X], 67 mTmpFloats[Matrix.MTRANS_Y]); 68 surface.setMatrix( 69 mTmpFloats[Matrix.MSCALE_X], mTmpFloats[Matrix.MSKEW_Y], 70 mTmpFloats[Matrix.MSKEW_X], mTmpFloats[Matrix.MSCALE_Y]); 71 if (false) { 72 Slog.i(WindowManagerService.TAG, "Black Surface @ (" + left + "," + top + "): (" 73 + mTmpFloats[Matrix.MTRANS_X] + "," 74 + mTmpFloats[Matrix.MTRANS_Y] + ") matrix=[" 75 + mTmpFloats[Matrix.MSCALE_X] + "," 76 + mTmpFloats[Matrix.MSCALE_Y] + "][" 77 + mTmpFloats[Matrix.MSKEW_X] + "," 78 + mTmpFloats[Matrix.MSKEW_Y] + "]"); 79 } 80 } 81 82 void clearMatrix() { 83 surface.setMatrix(1, 0, 0, 1); 84 } 85 } 86 87 final Rect mOuterRect; 88 final Rect mInnerRect; 89 final Matrix mTmpMatrix = new Matrix(); 90 final float[] mTmpFloats = new float[9]; 91 final BlackSurface[] mBlackSurfaces = new BlackSurface[4]; 92 93 public void printTo(String prefix, PrintWriter pw) { 94 pw.print(prefix); pw.print("Outer: "); mOuterRect.printShortString(pw); 95 pw.print(" / Inner: "); mInnerRect.printShortString(pw); 96 pw.println(); 97 for (int i=0; i<mBlackSurfaces.length; i++) { 98 BlackSurface bs = mBlackSurfaces[i]; 99 pw.print(prefix); pw.print("#"); pw.print(i); 100 pw.print(": "); pw.print(bs.surface); 101 pw.print(" left="); pw.print(bs.left); 102 pw.print(" top="); pw.println(bs.top); 103 } 104 } 105 106 public BlackFrame(SurfaceSession session, Rect outer, Rect inner, 107 int layer, final int layerStack) throws Surface.OutOfResourcesException { 108 boolean success = false; 109 110 mOuterRect = new Rect(outer); 111 mInnerRect = new Rect(inner); 112 try { 113 if (outer.top < inner.top) { 114 mBlackSurfaces[0] = new BlackSurface(session, layer, 115 outer.left, outer.top, inner.right, inner.top, layerStack); 116 } 117 if (outer.left < inner.left) { 118 mBlackSurfaces[1] = new BlackSurface(session, layer, 119 outer.left, inner.top, inner.left, outer.bottom, layerStack); 120 } 121 if (outer.bottom > inner.bottom) { 122 mBlackSurfaces[2] = new BlackSurface(session, layer, 123 inner.left, inner.bottom, outer.right, outer.bottom, layerStack); 124 } 125 if (outer.right > inner.right) { 126 mBlackSurfaces[3] = new BlackSurface(session, layer, 127 inner.right, outer.top, outer.right, inner.bottom, layerStack); 128 } 129 success = true; 130 } finally { 131 if (!success) { 132 kill(); 133 } 134 } 135 } 136 137 public void kill() { 138 if (mBlackSurfaces != null) { 139 for (int i=0; i<mBlackSurfaces.length; i++) { 140 if (mBlackSurfaces[i] != null) { 141 if (WindowManagerService.SHOW_TRANSACTIONS || 142 WindowManagerService.SHOW_SURFACE_ALLOC) Slog.i( 143 WindowManagerService.TAG, 144 " BLACK " + mBlackSurfaces[i].surface + ": DESTROY"); 145 mBlackSurfaces[i].surface.destroy(); 146 mBlackSurfaces[i] = null; 147 } 148 } 149 } 150 } 151 152 public void hide() { 153 if (mBlackSurfaces != null) { 154 for (int i=0; i<mBlackSurfaces.length; i++) { 155 if (mBlackSurfaces[i] != null) { 156 mBlackSurfaces[i].surface.hide(); 157 } 158 } 159 } 160 } 161 162 public void setMatrix(Matrix matrix) { 163 for (int i=0; i<mBlackSurfaces.length; i++) { 164 if (mBlackSurfaces[i] != null) { 165 mBlackSurfaces[i].setMatrix(matrix); 166 } 167 } 168 } 169 170 public void clearMatrix() { 171 for (int i=0; i<mBlackSurfaces.length; i++) { 172 if (mBlackSurfaces[i] != null) { 173 mBlackSurfaces[i].clearMatrix(); 174 } 175 } 176 } 177} 178