115 lines
3.3 KiB
Java
115 lines
3.3 KiB
Java
/*
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* Copyright (C) 2010 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; // TODO: use com.android.server.wm, once things move there
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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.PorterDuff;
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import android.graphics.Rect;
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import android.graphics.Region;
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import android.util.DisplayMetrics;
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import android.util.Slog;
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import android.view.Display;
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import android.view.Surface;
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import android.view.SurfaceSession;
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class StrictModeFlash {
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private static final String TAG = "StrictModeFlash";
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Surface mSurface;
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int mLastDW;
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int mLastDH;
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boolean mDrawNeeded;
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final int mThickness = 20;
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public StrictModeFlash(Display display, SurfaceSession session) {
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final DisplayMetrics dm = new DisplayMetrics();
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display.getMetrics(dm);
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try {
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mSurface = new Surface(session, 0, "StrictModeFlash", -1, 1, 1, PixelFormat.TRANSLUCENT, 0);
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} catch (Surface.OutOfResourcesException e) {
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return;
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}
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mSurface.setLayer(WindowManagerService.TYPE_LAYER_MULTIPLIER * 101); // one more than Watermark? arbitrary.
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mSurface.setPosition(0, 0);
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mDrawNeeded = true;
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}
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private void drawIfNeeded() {
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if (!mDrawNeeded) {
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return;
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}
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mDrawNeeded = false;
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final int dw = mLastDW;
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final int dh = mLastDH;
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Rect dirty = new Rect(0, 0, dw, dh);
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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 (Surface.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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// Top
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c.clipRect(new Rect(0, 0, dw, mThickness), Region.Op.REPLACE);
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c.drawColor(Color.RED);
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// Left
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c.clipRect(new Rect(0, 0, mThickness, dh), Region.Op.REPLACE);
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c.drawColor(Color.RED);
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// Right
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c.clipRect(new Rect(dw - mThickness, 0, dw, dh), Region.Op.REPLACE);
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c.drawColor(Color.RED);
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// Bottom
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c.clipRect(new Rect(0, dh - mThickness, dw, dh), Region.Op.REPLACE);
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c.drawColor(Color.RED);
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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 (mSurface == null) {
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return;
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}
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drawIfNeeded();
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if (on) {
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mSurface.show();
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} else {
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mSurface.hide();
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}
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}
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void positionSurface(int dw, int dh) {
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if (mLastDW == dw && mLastDH == dh) {
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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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mSurface.setSize(dw, dh);
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mDrawNeeded = true;
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}
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}
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