blob: cdf6b08b1c571c3b520804e3a72cf5d8894407bc [file] [log] [blame]
/*
* Copyright (C) 2010 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.WindowManagerDebugConfig.TAG_WITH_CLASS_NAME;
import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM;
import android.graphics.BLASTBufferQueue;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.view.Surface;
import android.view.Surface.OutOfResourcesException;
import android.view.SurfaceControl;
import android.view.WindowManagerPolicyConstants;
class StrictModeFlash {
private static final String TAG = TAG_WITH_CLASS_NAME ? "StrictModeFlash" : TAG_WM;
private static final String TITLE = "StrictModeFlash";
private final SurfaceControl mSurfaceControl;
private final Surface mSurface;
private final BLASTBufferQueue mBlastBufferQueue;
private int mLastDW;
private int mLastDH;
private boolean mDrawNeeded;
private final int mThickness = 20;
StrictModeFlash(DisplayContent dc, SurfaceControl.Transaction t) {
SurfaceControl ctrl = null;
try {
ctrl = dc.makeOverlay()
.setName(TITLE)
.setBLASTLayer()
.setFormat(PixelFormat.TRANSLUCENT)
.setCallsite(TITLE)
.build();
// one more than Watermark? arbitrary.
t.setLayer(ctrl, WindowManagerPolicyConstants.STRICT_MODE_LAYER);
t.setPosition(ctrl, 0, 0);
t.show(ctrl);
// Ensure we aren't considered as obscuring for Input purposes.
InputMonitor.setTrustedOverlayInputInfo(ctrl, t, dc.getDisplayId(), TITLE);
} catch (OutOfResourcesException e) {
}
mSurfaceControl = ctrl;
mDrawNeeded = true;
mBlastBufferQueue = new BLASTBufferQueue(TITLE, mSurfaceControl, 1 /* width */,
1 /* height */, PixelFormat.RGBA_8888);
mSurface = mBlastBufferQueue.createSurface();
}
private void drawIfNeeded() {
if (!mDrawNeeded) {
return;
}
mDrawNeeded = false;
final int dw = mLastDW;
final int dh = mLastDH;
mBlastBufferQueue.update(mSurfaceControl, dw, dh, PixelFormat.RGBA_8888);
Canvas c = null;
try {
c = mSurface.lockCanvas(null);
} catch (IllegalArgumentException | OutOfResourcesException e) {
}
if (c == null) {
return;
}
// Top
c.save();
c.clipRect(new Rect(0, 0, dw, mThickness));
c.drawColor(Color.RED);
c.restore();
// Left
c.save();
c.clipRect(new Rect(0, 0, mThickness, dh));
c.drawColor(Color.RED);
c.restore();
// Right
c.save();
c.clipRect(new Rect(dw - mThickness, 0, dw, dh));
c.drawColor(Color.RED);
c.restore();
// Bottom
c.save();
c.clipRect(new Rect(0, dh - mThickness, dw, dh));
c.drawColor(Color.RED);
c.restore();
mSurface.unlockCanvasAndPost(c);
}
// Note: caller responsible for being inside
// Surface.openTransaction() / closeTransaction()
public void setVisibility(boolean on, SurfaceControl.Transaction t) {
if (mSurfaceControl == null) {
return;
}
drawIfNeeded();
if (on) {
t.show(mSurfaceControl);
} else {
t.hide(mSurfaceControl);
}
}
void positionSurface(int dw, int dh, SurfaceControl.Transaction t) {
if (mLastDW == dw && mLastDH == dh) {
return;
}
mLastDW = dw;
mLastDH = dh;
t.setBufferSize(mSurfaceControl, dw, dh);
mDrawNeeded = true;
}
}