| /* |
| * Copyright (C) 2020 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.statusbar |
| |
| import android.app.ActivityManager |
| import android.content.res.Resources |
| import android.os.SystemProperties |
| import android.util.MathUtils |
| import android.view.SurfaceControl |
| import android.view.ViewRootImpl |
| import androidx.annotation.VisibleForTesting |
| import com.android.internal.util.IndentingPrintWriter |
| import com.android.systemui.Dumpable |
| import com.android.systemui.R |
| import com.android.systemui.dagger.qualifiers.Main |
| import com.android.systemui.dump.DumpManager |
| import java.io.FileDescriptor |
| import java.io.PrintWriter |
| import javax.inject.Inject |
| import javax.inject.Singleton |
| |
| @Singleton |
| open class BlurUtils @Inject constructor( |
| @Main private val resources: Resources, |
| dumpManager: DumpManager |
| ) : Dumpable { |
| private val minBlurRadius = resources.getDimensionPixelSize(R.dimen.min_window_blur_radius) |
| private val maxBlurRadius = resources.getDimensionPixelSize(R.dimen.max_window_blur_radius) |
| private val blurSysProp = SystemProperties |
| .getBoolean("ro.surface_flinger.supports_background_blur", false) |
| |
| init { |
| dumpManager.registerDumpable(javaClass.name, this) |
| } |
| |
| /** |
| * Translates a ratio from 0 to 1 to a blur radius in pixels. |
| */ |
| fun blurRadiusOfRatio(ratio: Float): Int { |
| if (ratio == 0f) { |
| return 0 |
| } |
| return MathUtils.lerp(minBlurRadius.toFloat(), maxBlurRadius.toFloat(), ratio).toInt() |
| } |
| |
| /** |
| * Translates a blur radius in pixels to a ratio between 0 to 1. |
| */ |
| fun ratioOfBlurRadius(blur: Int): Float { |
| if (blur == 0) { |
| return 0f |
| } |
| return MathUtils.map(minBlurRadius.toFloat(), maxBlurRadius.toFloat(), |
| 0f /* maxStart */, 1f /* maxStop */, blur.toFloat()) |
| } |
| |
| /** |
| * Applies background blurs to a {@link ViewRootImpl}. |
| * |
| * @param viewRootImpl The window root. |
| * @param radius blur radius in pixels. |
| */ |
| fun applyBlur(viewRootImpl: ViewRootImpl?, radius: Int) { |
| if (viewRootImpl == null || !viewRootImpl.surfaceControl.isValid || |
| !supportsBlursOnWindows()) { |
| return |
| } |
| createTransaction().use { |
| it.setBackgroundBlurRadius(viewRootImpl.surfaceControl, radius) |
| it.apply() |
| } |
| } |
| |
| @VisibleForTesting |
| open fun createTransaction(): SurfaceControl.Transaction { |
| return SurfaceControl.Transaction() |
| } |
| |
| /** |
| * If this device can render blurs. |
| * |
| * @see android.view.SurfaceControl.Transaction#setBackgroundBlurRadius(SurfaceControl, int) |
| * @return {@code true} when supported. |
| */ |
| open fun supportsBlursOnWindows(): Boolean { |
| return blurSysProp && ActivityManager.isHighEndGfx() |
| } |
| |
| override fun dump(fd: FileDescriptor, pw: PrintWriter, args: Array<out String>) { |
| IndentingPrintWriter(pw, " ").let { |
| it.println("BlurUtils:") |
| it.increaseIndent() |
| it.println("minBlurRadius: $minBlurRadius") |
| it.println("maxBlurRadius: $maxBlurRadius") |
| it.println("blurSysProp: $blurSysProp") |
| it.println("supportsBlursOnWindows: ${supportsBlursOnWindows()}") |
| } |
| } |
| } |