/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.wm;
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import static com.android.server.wm.WindowManagerDebugConfig.TAG_WITH_CLASS_NAME;
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import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.PixelFormat;
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import android.graphics.Point;
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import android.graphics.PorterDuff;
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import android.graphics.Rect;
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import android.graphics.drawable.Drawable;
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import android.view.Display;
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import android.view.Surface;
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import android.view.Surface.OutOfResourcesException;
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import android.view.SurfaceControl;
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class EmulatorDisplayOverlay {
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private static final String TAG = TAG_WITH_CLASS_NAME ? "EmulatorDisplayOverlay" : TAG_WM;
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// Display dimensions
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private Point mScreenSize;
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private final SurfaceControl mSurfaceControl;
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private final Surface mSurface = new Surface();
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private int mLastDW;
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private int mLastDH;
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private boolean mDrawNeeded;
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private Drawable mOverlay;
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private int mRotation;
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private boolean mVisible;
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public EmulatorDisplayOverlay(Context context, DisplayContent dc,
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int zOrder) {
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final Display display = dc.getDisplay();
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mScreenSize = new Point();
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display.getSize(mScreenSize);
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SurfaceControl ctrl = null;
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try {
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ctrl = dc.makeOverlay()
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.setName("EmulatorDisplayOverlay")
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.setBufferSize(mScreenSize.x, mScreenSize.y)
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.setFormat(PixelFormat.TRANSLUCENT)
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.build();
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ctrl.setLayer(zOrder);
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ctrl.setPosition(0, 0);
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ctrl.show();
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mSurface.copyFrom(ctrl);
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} catch (OutOfResourcesException e) {
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}
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mSurfaceControl = ctrl;
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mDrawNeeded = true;
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mOverlay = context.getDrawable(
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com.android.internal.R.drawable.emulator_circular_window_overlay);
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}
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private void drawIfNeeded() {
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if (!mDrawNeeded || !mVisible) {
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return;
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}
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mDrawNeeded = false;
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Rect dirty = new Rect(0, 0, mScreenSize.x, mScreenSize.y);
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Canvas c = null;
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try {
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c = mSurface.lockCanvas(dirty);
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} catch (IllegalArgumentException e) {
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} catch (OutOfResourcesException e) {
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}
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if (c == null) {
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return;
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}
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c.drawColor(Color.TRANSPARENT, PorterDuff.Mode.SRC);
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mSurfaceControl.setPosition(0, 0);
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// Always draw the overlay with square dimensions
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int size = Math.max(mScreenSize.x, mScreenSize.y);
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mOverlay.setBounds(0, 0, size, size);
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mOverlay.draw(c);
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mSurface.unlockCanvasAndPost(c);
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}
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// Note: caller responsible for being inside
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// Surface.openTransaction() / closeTransaction()
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public void setVisibility(boolean on) {
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if (mSurfaceControl == null) {
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return;
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}
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mVisible = on;
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drawIfNeeded();
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if (on) {
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mSurfaceControl.show();
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} else {
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mSurfaceControl.hide();
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}
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}
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void positionSurface(int dw, int dh, int rotation) {
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if (mLastDW == dw && mLastDH == dh && mRotation == rotation) {
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return;
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}
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mLastDW = dw;
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mLastDH = dh;
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mDrawNeeded = true;
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mRotation = rotation;
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drawIfNeeded();
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}
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}
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