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Cleanup dual page split (#4956)

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* Cleanup Dual Page Split

* Move where images is processed

* Change parameter name to imageStream

* Use available instead of Int.MAX_VALUE

* Update JavaDoc
This commit is contained in:
Andreas 2021-04-25 17:08:51 +02:00 committed by GitHub
parent f608cb55eb
commit 662b71436e
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4 changed files with 48 additions and 32 deletions
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39
app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerPageHolder.kt
View file

@ -235,16 +235,13 @@ class PagerPageHolder(
readImageHeaderSubscription = Observable
.fromCallable {
val stream = streamFn().buffered(16)
openStream = stream
openStream = process(stream)
ImageUtil.findImageType(stream) == ImageUtil.ImageType.GIF
}
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.doOnNext { isAnimated ->
if (viewer.config.dualPageSplit) {
openStream = processDualPageSplit(openStream!!)
}
if (!isAnimated) {
initSubsamplingImageView().setImage(ImageSource.inputStream(openStream!!))
} else {
@ -257,21 +254,31 @@ class PagerPageHolder(
.subscribe({}, {})
}
private fun processDualPageSplit(openStream: InputStream): InputStream {
var inputStream = openStream
val (isDoublePage, stream) = when (page) {
is InsertPage -> Pair(true, inputStream)
else -> ImageUtil.isDoublePage(inputStream)
private fun process(imageStream: InputStream): InputStream {
if (!viewer.config.dualPageSplit) {
return imageStream
}
inputStream = stream
if (!isDoublePage) return inputStream
if (page is InsertPage) {
return splitInHalf(imageStream)
}
val isDoublePage = ImageUtil.isDoublePage(imageStream)
if (!isDoublePage) {
return imageStream
}
onPageSplit()
return splitInHalf(imageStream)
}
private fun splitInHalf(imageStream: InputStream): InputStream {
var side = when {
viewer is L2RPagerViewer && page is InsertPage -> ImageUtil.Side.RIGHT
(viewer is R2LPagerViewer || viewer is VerticalPagerViewer) && page is InsertPage -> ImageUtil.Side.LEFT
viewer !is L2RPagerViewer && page is InsertPage -> ImageUtil.Side.LEFT
viewer is L2RPagerViewer && page !is InsertPage -> ImageUtil.Side.LEFT
(viewer is R2LPagerViewer || viewer is VerticalPagerViewer) && page !is InsertPage -> ImageUtil.Side.RIGHT
viewer !is L2RPagerViewer && page !is InsertPage -> ImageUtil.Side.RIGHT
else -> error("We should choose a side!")
}
@ -282,11 +289,7 @@ class PagerPageHolder(
}
}
if (page !is InsertPage) {
onPageSplit()
}
return ImageUtil.splitInHalf(inputStream, side)
return ImageUtil.splitInHalf(imageStream, side)
}
private fun onPageSplit() {

5
app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PagerViewer.kt
View file

@ -385,7 +385,10 @@ abstract class PagerViewer(val activity: ReaderActivity) : BaseViewer {
}
fun onPageSplit(currentPage: ReaderPage, newPage: InsertPage) {
adapter.onPageSplit(currentPage, newPage, this::class.java)
activity.runOnUiThread {
// Need to insert on UI thread else images will go blank
adapter.onPageSplit(currentPage, newPage, this::class.java)
}
}
private fun cleanupPageSplit() {

25
app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonPageHolder.kt
View file

@ -281,22 +281,13 @@ class WebtoonPageHolder(
readImageHeaderSubscription = Observable
.fromCallable {
val stream = streamFn().buffered(16)
openStream = stream
openStream = process(stream)
ImageUtil.findImageType(stream) == ImageUtil.ImageType.GIF
}
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.doOnNext { isAnimated ->
if (viewer.config.dualPageSplit) {
val (isDoublePage, stream) = ImageUtil.isDoublePage(openStream!!)
openStream = if (!isDoublePage) {
stream
} else {
val upperSide = if (viewer.config.dualPageInvert) ImageUtil.Side.LEFT else ImageUtil.Side.RIGHT
ImageUtil.splitAndMerge(stream, upperSide)
}
}
if (!isAnimated) {
val subsamplingView = initSubsamplingImageView()
subsamplingView.isVisible = true
@ -315,6 +306,20 @@ class WebtoonPageHolder(
addSubscription(readImageHeaderSubscription)
}
private fun process(imageStream: InputStream): InputStream {
if (!viewer.config.dualPageSplit) {
return imageStream
}
val isDoublePage = ImageUtil.isDoublePage(imageStream)
if (!isDoublePage) {
return imageStream
}
val upperSide = if (viewer.config.dualPageInvert) ImageUtil.Side.LEFT else ImageUtil.Side.RIGHT
return ImageUtil.splitAndMerge(imageStream, upperSide)
}
/**
* Called when the page has an error.
*/

11
app/src/main/java/eu/kanade/tachiyomi/util/system/ImageUtil.kt
View file

@ -77,15 +77,20 @@ object ImageUtil {
}
/**
* Check whether the image is a double image (width > height), return the result and original stream
* Check whether the image is a double-page spread
* @return true if the width is greater than the height
*/
fun isDoublePage(imageStream: InputStream): Pair<Boolean, InputStream> {
fun isDoublePage(imageStream: InputStream): Boolean {
imageStream.mark(imageStream.available() + 1)
val imageBytes = imageStream.readBytes()
val options = BitmapFactory.Options().apply { inJustDecodeBounds = true }
BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.size, options)
return Pair(options.outWidth > options.outHeight, ByteArrayInputStream(imageBytes))
imageStream.reset()
return options.outWidth > options.outHeight
}
/**