110 lines
4.0 KiB
Kotlin
110 lines
4.0 KiB
Kotlin
/*
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* Copyright 2022 Tarsin Norbin
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*
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* This file is part of EhViewer
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*
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* EhViewer is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* EhViewer is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with EhViewer.
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* If not, see <https://www.gnu.org/licenses/>.
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*/
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package com.hippo.image
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import android.graphics.ColorSpace
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import android.graphics.ImageDecoder
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import android.graphics.ImageDecoder.ImageInfo
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import android.graphics.ImageDecoder.Source
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import android.graphics.drawable.Animatable
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import android.graphics.drawable.BitmapDrawable
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import android.graphics.drawable.Drawable
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import android.os.Build
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import com.hippo.ehviewer.EhApplication
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import com.hippo.ehviewer.R
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import java.nio.ByteBuffer
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import kotlin.math.min
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class Image private constructor(private val src: CloseableSource) {
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var mObtainedDrawable: Drawable? =
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ImageDecoder.decodeDrawable(src.source) { decoder: ImageDecoder, info: ImageInfo, _: Source ->
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if (Build.VERSION.SDK_INT == Build.VERSION_CODES.P) {
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// Allocating hardware bitmap may cause a crash on framework versions prior to Android Q
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decoder.allocator = ImageDecoder.ALLOCATOR_SOFTWARE
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}
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decoder.setTargetColorSpace(colorSpace)
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decoder.setTargetSampleSize(
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calculateSampleSize(info, 2 * screenHeight, 2 * screenWidth)
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)
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}.also {
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if (it !is Animatable) src.close()
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}
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private set
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val size: Int
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get() = mObtainedDrawable!!.run { intrinsicHeight * intrinsicWidth * 4 * if (this is Animatable) 4 else 1 }
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@Synchronized
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fun recycle() {
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(mObtainedDrawable as? Animatable)?.stop()
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(mObtainedDrawable as? BitmapDrawable)?.bitmap?.recycle()
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mObtainedDrawable?.callback = null
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if (mObtainedDrawable is Animatable) src.close()
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mObtainedDrawable = null
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}
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companion object {
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fun calculateSampleSize(info: ImageInfo, targetHeight: Int, targetWeight: Int): Int {
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return min(
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info.size.width / targetWeight,
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info.size.height / targetHeight
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).coerceAtLeast(1)
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}
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private val imageSearchMaxSize =
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EhApplication.application.resources.getDimensionPixelOffset(R.dimen.image_search_max_size)
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@JvmStatic
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val imageSearchDecoderSampleListener =
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ImageDecoder.OnHeaderDecodedListener { decoder, info, _ ->
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decoder.setTargetSampleSize(
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calculateSampleSize(info, imageSearchMaxSize, imageSearchMaxSize)
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)
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}
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val screenWidth = EhApplication.application.resources.displayMetrics.widthPixels
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val screenHeight = EhApplication.application.resources.displayMetrics.heightPixels
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val isWideColorGamut =
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EhApplication.application.resources.configuration.isScreenWideColorGamut
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var colorSpace = ColorSpace.get(
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if (isWideColorGamut && EhApplication.readerPreferences.wideColorGamut()
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.get()
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) ColorSpace.Named.DISPLAY_P3 else ColorSpace.Named.SRGB
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)
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@JvmStatic
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fun decode(src: CloseableSource): Image? {
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return runCatching {
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Image(src)
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}.onFailure {
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src.close()
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it.printStackTrace()
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}.getOrNull()
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}
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@JvmStatic
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external fun rewriteGifSource(buffer: ByteBuffer)
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@JvmStatic
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external fun rewriteGifSource2(fd: Int)
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}
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interface CloseableSource : AutoCloseable {
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val source: Source
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}
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}
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