/*
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* Copyright (C) 2019 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.systemui.statusbar
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import android.content.Context
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import android.graphics.Bitmap
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import android.graphics.Canvas
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import android.graphics.Point
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import android.graphics.Rect
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import android.renderscript.Allocation
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import android.renderscript.Element
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import android.renderscript.RenderScript
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import android.renderscript.ScriptIntrinsicBlur
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import android.util.MathUtils
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import com.android.internal.graphics.ColorUtils
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import com.android.systemui.statusbar.notification.MediaNotificationProcessor
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import javax.inject.Inject
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import javax.inject.Singleton
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private const val COLOR_ALPHA = (255 * 0.7f).toInt()
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private const val BLUR_RADIUS = 25f
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private const val DOWNSAMPLE = 6
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@Singleton
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class MediaArtworkProcessor @Inject constructor() {
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private val mTmpSize = Point()
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private var mArtworkCache: Bitmap? = null
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fun processArtwork(context: Context, artwork: Bitmap): Bitmap {
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if (mArtworkCache != null) {
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return mArtworkCache!!
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}
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context.display.getSize(mTmpSize)
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val renderScript = RenderScript.create(context)
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val rect = Rect(0, 0, artwork.width, artwork.height)
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MathUtils.fitRect(rect, Math.max(mTmpSize.x / DOWNSAMPLE, mTmpSize.y / DOWNSAMPLE))
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var inBitmap = Bitmap.createScaledBitmap(artwork, rect.width(), rect.height(),
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true /* filter */)
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// Render script blurs only support ARGB_8888, we need a conversion if we got a
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// different bitmap config.
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if (inBitmap.config != Bitmap.Config.ARGB_8888) {
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val oldIn = inBitmap
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inBitmap = oldIn.copy(Bitmap.Config.ARGB_8888, false /* isMutable */)
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oldIn.recycle()
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}
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val input = Allocation.createFromBitmap(renderScript, inBitmap,
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Allocation.MipmapControl.MIPMAP_NONE, Allocation.USAGE_GRAPHICS_TEXTURE)
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val outBitmap = Bitmap.createBitmap(inBitmap.width, inBitmap.height,
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Bitmap.Config.ARGB_8888)
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val output = Allocation.createFromBitmap(renderScript, outBitmap)
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val blur = ScriptIntrinsicBlur.create(renderScript, Element.U8_4(renderScript))
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blur.setRadius(BLUR_RADIUS)
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blur.setInput(input)
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blur.forEach(output)
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output.copyTo(outBitmap)
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val swatch = MediaNotificationProcessor.findBackgroundSwatch(artwork)
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input.destroy()
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output.destroy()
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inBitmap.recycle()
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blur.destroy()
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val canvas = Canvas(outBitmap)
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canvas.drawColor(ColorUtils.setAlphaComponent(swatch.rgb, COLOR_ALPHA))
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return outBitmap
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}
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fun clearCache() {
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mArtworkCache?.recycle()
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mArtworkCache = null
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}
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}
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