| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed 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 com.android.server.wm; |
| |
| import static com.android.server.wm.ProtoLogGroup.WM_SHOW_SURFACE_ALLOC; |
| |
| import android.graphics.Rect; |
| import android.view.Surface.OutOfResourcesException; |
| import android.view.SurfaceControl; |
| |
| import com.android.server.protolog.common.ProtoLog; |
| |
| import java.io.PrintWriter; |
| import java.util.function.Supplier; |
| |
| /** |
| * Four black surfaces put together to make a black frame. |
| */ |
| public class BlackFrame { |
| static class BlackSurface { |
| final int left; |
| final int top; |
| final int layer; |
| final SurfaceControl surface; |
| |
| BlackSurface(SurfaceControl.Transaction transaction, int layer, |
| int l, int t, int r, int b, DisplayContent dc, |
| SurfaceControl surfaceControl) throws OutOfResourcesException { |
| left = l; |
| top = t; |
| this.layer = layer; |
| int w = r-l; |
| int h = b-t; |
| |
| surface = dc.makeOverlay() |
| .setName("BlackSurface") |
| .setColorLayer() |
| .setParent(surfaceControl) |
| .build(); |
| transaction.setWindowCrop(surface, w, h); |
| transaction.setAlpha(surface, 1); |
| transaction.setLayer(surface, layer); |
| transaction.setPosition(surface, left, top); |
| transaction.show(surface); |
| ProtoLog.i(WM_SHOW_SURFACE_ALLOC, |
| " BLACK %s: CREATE layer=%d", surface, layer); |
| } |
| } |
| |
| private final Rect mOuterRect; |
| private final Rect mInnerRect; |
| private final BlackSurface[] mBlackSurfaces = new BlackSurface[4]; |
| |
| private final Supplier<SurfaceControl.Transaction> mTransactionFactory; |
| |
| public void printTo(String prefix, PrintWriter pw) { |
| pw.print(prefix); pw.print("Outer: "); mOuterRect.printShortString(pw); |
| pw.print(" / Inner: "); mInnerRect.printShortString(pw); |
| pw.println(); |
| for (int i=0; i<mBlackSurfaces.length; i++) { |
| BlackSurface bs = mBlackSurfaces[i]; |
| pw.print(prefix); pw.print("#"); pw.print(i); |
| pw.print(": "); pw.print(bs.surface); |
| pw.print(" left="); pw.print(bs.left); |
| pw.print(" top="); pw.println(bs.top); |
| } |
| } |
| |
| public BlackFrame(Supplier<SurfaceControl.Transaction> factory, SurfaceControl.Transaction t, |
| Rect outer, Rect inner, int layer, DisplayContent dc, boolean forceDefaultOrientation, |
| SurfaceControl surfaceControl) |
| throws OutOfResourcesException { |
| boolean success = false; |
| |
| mTransactionFactory = factory; |
| |
| // TODO: Why do we use 4 surfaces instead of just one big one behind the screenshot? |
| // b/68253229 |
| mOuterRect = new Rect(outer); |
| mInnerRect = new Rect(inner); |
| try { |
| if (outer.top < inner.top) { |
| mBlackSurfaces[0] = new BlackSurface(t, layer, |
| outer.left, outer.top, inner.right, inner.top, dc, surfaceControl); |
| } |
| if (outer.left < inner.left) { |
| mBlackSurfaces[1] = new BlackSurface(t, layer, |
| outer.left, inner.top, inner.left, outer.bottom, dc, surfaceControl); |
| } |
| if (outer.bottom > inner.bottom) { |
| mBlackSurfaces[2] = new BlackSurface(t, layer, |
| inner.left, inner.bottom, outer.right, outer.bottom, dc, |
| surfaceControl); |
| } |
| if (outer.right > inner.right) { |
| mBlackSurfaces[3] = new BlackSurface(t, layer, |
| inner.right, outer.top, outer.right, inner.bottom, dc, surfaceControl); |
| } |
| success = true; |
| } finally { |
| if (!success) { |
| kill(); |
| } |
| } |
| } |
| |
| public void kill() { |
| SurfaceControl.Transaction t = mTransactionFactory.get(); |
| for (int i = 0; i < mBlackSurfaces.length; i++) { |
| if (mBlackSurfaces[i] != null) { |
| ProtoLog.i(WM_SHOW_SURFACE_ALLOC, " BLACK %s: DESTROY", mBlackSurfaces[i].surface); |
| t.remove(mBlackSurfaces[i].surface); |
| mBlackSurfaces[i] = null; |
| } |
| } |
| t.apply(); |
| } |
| } |