Apply color config on-the-fly

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/config/ReaderSettings.kt

@@ -3,10 +3,12 @@ package org.koitharu.kotatsu.reader.ui.config
 import android.content.SharedPreferences
 import android.graphics.Bitmap
 import android.view.View
+import androidx.annotation.CheckResult
 import androidx.lifecycle.MediatorLiveData
 import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
 import com.davemorrissey.labs.subscaleview.decoder.SkiaImageDecoder
 import com.davemorrissey.labs.subscaleview.decoder.SkiaImageRegionDecoder
+import com.davemorrissey.labs.subscaleview.decoder.SkiaPooledImageRegionDecoder
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
@@ -16,6 +18,7 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import org.koitharu.kotatsu.core.model.ZoomMode
 import org.koitharu.kotatsu.core.prefs.AppSettings
+import org.koitharu.kotatsu.core.util.ext.isLowRamDevice
 import org.koitharu.kotatsu.reader.domain.ReaderColorFilter
 
 class ReaderSettings(
@@ -51,11 +54,19 @@ class ReaderSettings(
 		view.background = bg.resolve(view.context)
 	}
 
-	fun applyBitmapConfig(ssiv: SubsamplingScaleImageView) {
+	@CheckResult
+	fun applyBitmapConfig(ssiv: SubsamplingScaleImageView): Boolean {
 		val config = bitmapConfig
-		if (ssiv.regionDecoderFactory.bitmapConfig != config) {
-			ssiv.regionDecoderFactory = SkiaImageRegionDecoder.Factory(config)
+		return if (ssiv.regionDecoderFactory.bitmapConfig != config) {
+			ssiv.regionDecoderFactory = if (ssiv.context.isLowRamDevice()) {
+				SkiaImageRegionDecoder.Factory(config)
+			} else {
+				SkiaPooledImageRegionDecoder.Factory(config)
+			}
 			ssiv.bitmapDecoderFactory = SkiaImageDecoder.Factory(config)
+			true
+		} else {
+			false
 		}
 	}
 

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/PageHolderDelegate.kt

@@ -84,6 +84,14 @@ class PageHolderDelegate(
 		job?.cancel()
 	}
 
+	fun reload() {
+		if (state == State.SHOWN ) {
+			file?.let {
+				callback.onImageReady(it.toUri())
+			}
+		}
+	}
+
 	override fun onReady() {
 		state = State.SHOWING
 		error = null

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/standard/PageHolder.kt

@@ -46,7 +46,10 @@ open class PageHolder(
 	override fun onConfigChanged() {
 		super.onConfigChanged()
 		binding.zoomControl.isVisible = settings.isZoomControlsEnabled
-		settings.applyBitmapConfig(binding.ssiv)
+		@Suppress("SENSELESS_COMPARISON")
+		if (settings.applyBitmapConfig(binding.ssiv) && delegate != null) {
+			delegate.reload()
+		}
 	}
 
 	@SuppressLint("SetTextI18n")

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/webtoon/WebtoonHolder.kt

@@ -40,7 +40,10 @@ class WebtoonHolder(
 
 	override fun onConfigChanged() {
 		super.onConfigChanged()
-		settings.applyBitmapConfig(binding.ssiv)
+		@Suppress("SENSELESS_COMPARISON")
+		if (settings.applyBitmapConfig(binding.ssiv) && delegate != null) {
+			delegate.reload()
+		}
 	}
 
 	override fun onBind(data: ReaderPage) {