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/*
* Copyright (C) 2021 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.systemui.biometrics;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import com.android.systemui.R;
/**
* Surface View for providing the Global High-Brightness Mode (GHBM) illumination for UDFPS.
*/
public class UdfpsSurfaceView extends SurfaceView implements SurfaceHolder.Callback {
private static final String TAG = "UdfpsSurfaceView";
/**
* Notifies {@link UdfpsView} when to enable GHBM illumination.
*/
interface GhbmIlluminationListener {
/**
* @param surface the surface for which GHBM should be enabled.
* @param onDisplayConfigured a runnable that should be run after GHBM is enabled.
*/
void enableGhbm(@NonNull Surface surface, @Nullable Runnable onDisplayConfigured);
}
@NonNull private final SurfaceHolder mHolder;
@NonNull private final Paint mSensorPaint;
@Nullable private GhbmIlluminationListener mGhbmIlluminationListener;
@Nullable private Runnable mOnDisplayConfigured;
boolean mAwaitingSurfaceToStartIllumination;
boolean mHasValidSurface;
private Drawable mUdfpsIconPressed;
public UdfpsSurfaceView(Context context, AttributeSet attrs) {
super(context, attrs);
// Make this SurfaceView draw on top of everything else in this window. This allows us to
// 1) Always show the HBM circle on top of everything else, and
// 2) Properly composite this view with any other animations in the same window no matter
// what contents are added in which order to this view hierarchy.
setZOrderOnTop(true);
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setFormat(PixelFormat.RGBA_8888);
mSensorPaint = new Paint(0 /* flags */);
mSensorPaint.setAntiAlias(true);
mSensorPaint.setColor(context.getColor(R.color.config_udfpsColor));
mSensorPaint.setStyle(Paint.Style.FILL);
mUdfpsIconPressed = context.getDrawable(R.drawable.udfps_icon_pressed);
}
@Override public void surfaceCreated(SurfaceHolder holder) {
mHasValidSurface = true;
if (mAwaitingSurfaceToStartIllumination) {
doIlluminate(mOnDisplayConfigured);
mOnDisplayConfigured = null;
mAwaitingSurfaceToStartIllumination = false;
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
// Unused.
}
@Override public void surfaceDestroyed(SurfaceHolder holder) {
mHasValidSurface = false;
}
void setGhbmIlluminationListener(@Nullable GhbmIlluminationListener listener) {
mGhbmIlluminationListener = listener;
}
/**
* Note: there is no corresponding method to stop GHBM illumination. It is expected that
* {@link UdfpsView} will hide this view, which would destroy the surface and remove the
* illumination dot.
*/
void startGhbmIllumination(@Nullable Runnable onDisplayConfigured) {
if (mGhbmIlluminationListener == null) {
Log.e(TAG, "startIllumination | mGhbmIlluminationListener is null");
return;
}
if (mHasValidSurface) {
doIlluminate(onDisplayConfigured);
} else {
mAwaitingSurfaceToStartIllumination = true;
mOnDisplayConfigured = onDisplayConfigured;
}
}
private void doIlluminate(@Nullable Runnable onDisplayConfigured) {
if (mGhbmIlluminationListener == null) {
Log.e(TAG, "doIlluminate | mGhbmIlluminationListener is null");
return;
}
mGhbmIlluminationListener.enableGhbm(mHolder.getSurface(), onDisplayConfigured);
}
/**
* Immediately draws the illumination dot on this SurfaceView's surface.
*/
void drawIlluminationDot(@NonNull RectF sensorRect) {
if (!mHasValidSurface) {
Log.e(TAG, "drawIlluminationDot | the surface is destroyed or was never created.");
return;
}
Canvas canvas = null;
try {
canvas = mHolder.lockCanvas();
mUdfpsIconPressed.setBounds(
Math.round(sensorRect.left),
Math.round(sensorRect.top),
Math.round(sensorRect.right),
Math.round(sensorRect.bottom)
);
mUdfpsIconPressed.draw(canvas);
canvas.drawOval(sensorRect, mSensorPaint);
} finally {
// Make sure the surface is never left in a bad state.
if (canvas != null) {
mHolder.unlockCanvasAndPost(canvas);
}
}
}
}
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