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Fix image viewer rotation handling

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This commit is contained in:
Matéo Duparc 2022-04-16 16:42:47 +02:00
parent e6a1285e0a
commit 339309b00d
Signed by untrusted user: hardcoresushi
GPG Key ID: AFE384344A45E13A
1 changed files with 29 additions and 13 deletions
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42
app/src/main/java/sushi/hardcore/droidfs/file_viewers/ImageViewer.kt
View File

@ -11,6 +11,7 @@ import android.view.MotionEvent
import android.view.View
import android.view.WindowManager
import android.widget.Toast
import androidx.exifinterface.media.ExifInterface
import com.bumptech.glide.Glide
import com.bumptech.glide.RequestBuilder
import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool
@ -39,8 +40,9 @@ class ImageViewer: FileViewerActivity() {
private var x1 = 0F
private var x2 = 0F
private var slideshowActive = false
private var originalOrientation: Float = 0f
private var rotationAngle: Float = 0F
private var rotatedBitmap: Bitmap? = null
private var orientationTransformation: OrientationTransformation? = null
private val hideUI = Runnable {
binding.actionButtons.visibility = View.GONE
binding.topBar.visibility = View.GONE
@ -164,6 +166,16 @@ class ImageViewer: FileViewerActivity() {
if (bitmap == null) {
true
} else {
val orientation = ExifInterface(ByteArrayInputStream(it)).getAttributeInt(
ExifInterface.TAG_ORIENTATION,
ExifInterface.ORIENTATION_NORMAL
)
originalOrientation = when (orientation) {
ExifInterface.ORIENTATION_ROTATE_90 -> 90f
ExifInterface.ORIENTATION_ROTATE_180 -> 180f
ExifInterface.ORIENTATION_ROTATE_270 -> 270f
else -> 0f
}
val displayMetrics = Resources.getSystem().displayMetrics
if (displayMetrics.widthPixels < bitmap!!.width || displayMetrics.heightPixels < bitmap!!.height) {
val newWidth: Int
@ -177,17 +189,18 @@ class ImageViewer: FileViewerActivity() {
}
bitmap = Bitmap.createScaledBitmap(bitmap!!, newWidth, newHeight, false)
}
Glide.with(this).load(bitmap).into(binding.imageViewer)
Glide.with(this).load(bitmap).transform(OrientationTransformation(originalOrientation)).into(binding.imageViewer)
false
}
}
if (displayWithGlide) {
originalOrientation = 0f
requestBuilder = Glide.with(this).load(it)
requestBuilder?.into(binding.imageViewer)
}
fileName = File(filePath).name
binding.textFilename.text = fileName
rotationAngle = 0F
rotationAngle = originalOrientation
}
}
@ -222,28 +235,31 @@ class ImageViewer: FileViewerActivity() {
}
}
class RotateTransformation(private val imageViewer: ImageViewer): BitmapTransformation() {
class OrientationTransformation(private val orientation: Float): BitmapTransformation() {
lateinit var bitmap: Bitmap
override fun transform(pool: BitmapPool, toTransform: Bitmap, outWidth: Int, outHeight: Int): Bitmap? {
val matrix = Matrix()
matrix.postRotate(imageViewer.rotationAngle)
imageViewer.rotatedBitmap = Bitmap.createBitmap(toTransform, 0, 0, toTransform.width, toTransform.height, matrix, true)
return imageViewer.rotatedBitmap
return Bitmap.createBitmap(toTransform, 0, 0, toTransform.width, toTransform.height, Matrix().apply {
postRotate(orientation)
}, true).also {
bitmap = it
}
}
override fun updateDiskCacheKey(messageDigest: MessageDigest) {
messageDigest.update("rotate${imageViewer.rotationAngle}".toByteArray())
messageDigest.update("rotate$orientation".toByteArray())
}
}
private fun rotateImage(){
binding.imageViewer.restoreZoomNormal()
(requestBuilder ?: Glide.with(this).load(bitmap))
.transform(RotateTransformation(this)).into(binding.imageViewer)
orientationTransformation = OrientationTransformation(rotationAngle)
(requestBuilder ?: Glide.with(this).load(bitmap)).transform(orientationTransformation).into(binding.imageViewer)
}
private fun askSaveRotation(callback: () -> Unit){
if (rotationAngle%360 != 0f && !slideshowActive){
if (rotationAngle.mod(360f) != originalOrientation && !slideshowActive) {
CustomAlertDialogBuilder(this, themeValue)
.keepFullScreen()
.setTitle(R.string.warning)
@ -252,7 +268,7 @@ class ImageViewer: FileViewerActivity() {
.setNeutralButton(R.string.cancel, null)
.setPositiveButton(R.string.yes) { _, _ ->
val outputStream = ByteArrayOutputStream()
if (rotatedBitmap?.compress(
if (orientationTransformation?.bitmap?.compress(
if (fileName.endsWith("png", true)){
Bitmap.CompressFormat.PNG
} else {