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/*
* Copyright (C) 2014 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 android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.PixelFormat;
import android.graphics.Point;
import android.graphics.PorterDuff;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.Slog;
import android.view.Display;
import android.view.Surface;
import android.view.Surface.OutOfResourcesException;
import android.view.SurfaceControl;
import android.view.SurfaceSession;
class EmulatorDisplayOverlay {
private static final String TAG = "EmulatorDisplayOverlay";
// Display dimensions
private Point mScreenSize;
private final SurfaceControl mSurfaceControl;
private final Surface mSurface = new Surface();
private int mLastDW;
private int mLastDH;
private boolean mDrawNeeded;
private Drawable mOverlay;
private int mRotation;
private boolean mVisible;
public EmulatorDisplayOverlay(Context context, Display display, SurfaceSession session,
int zOrder) {
mScreenSize = new Point();
display.getSize(mScreenSize);
SurfaceControl ctrl = null;
try {
if (WindowManagerService.DEBUG_SURFACE_TRACE) {
ctrl = new WindowStateAnimator.SurfaceTrace(session, "EmulatorDisplayOverlay",
mScreenSize.x, mScreenSize.y, PixelFormat.TRANSLUCENT,
SurfaceControl.HIDDEN);
} else {
ctrl = new SurfaceControl(session, "EmulatorDisplayOverlay", mScreenSize.x,
mScreenSize.y, PixelFormat.TRANSLUCENT, SurfaceControl.HIDDEN);
}
ctrl.setLayerStack(display.getLayerStack());
ctrl.setLayer(zOrder);
ctrl.setPosition(0, 0);
ctrl.show();
mSurface.copyFrom(ctrl);
} catch (OutOfResourcesException e) {
}
mSurfaceControl = ctrl;
mDrawNeeded = true;
mOverlay = context.getDrawable(
com.android.internal.R.drawable.emulator_circular_window_overlay);
}
private void drawIfNeeded() {
if (!mDrawNeeded || !mVisible) {
return;
}
mDrawNeeded = false;
Rect dirty = new Rect(0, 0, mScreenSize.x, mScreenSize.y);
Canvas c = null;
try {
c = mSurface.lockCanvas(dirty);
} catch (IllegalArgumentException e) {
} catch (OutOfResourcesException e) {
}
if (c == null) {
return;
}
c.drawColor(Color.TRANSPARENT, PorterDuff.Mode.SRC);
mSurfaceControl.setPosition(0, 0);
// Always draw the overlay with square dimensions
int size = Math.max(mScreenSize.x, mScreenSize.y);
mOverlay.setBounds(0, 0, size, size);
mOverlay.draw(c);
mSurface.unlockCanvasAndPost(c);
}
// Note: caller responsible for being inside
// Surface.openTransaction() / closeTransaction()
public void setVisibility(boolean on) {
if (mSurfaceControl == null) {
return;
}
mVisible = on;
drawIfNeeded();
if (on) {
mSurfaceControl.show();
} else {
mSurfaceControl.hide();
}
}
void positionSurface(int dw, int dh, int rotation) {
if (mLastDW == dw && mLastDH == dh && mRotation == rotation) {
return;
}
mLastDW = dw;
mLastDH = dh;
mDrawNeeded = true;
mRotation = rotation;
drawIfNeeded();
}
}
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