1

app/src/main/java/com/isidroid/c23/domain/use_case/RenderUseCase.kt

@@ -12,10 +12,17 @@ import com.isidroid.rendering.model.RenderSettingsV2
 import com.isidroid.spot.model.PrintProfile
 import com.isidroid.spot.model.PrintProfile
 import com.isidroid.rendering.repository.RenderRepository
 import com.isidroid.rendering.repository.RenderRepository
 import com.isidroid.spot.repository.ActiveSpotRepository
 import com.isidroid.spot.repository.ActiveSpotRepository
+import com.isidroid.utils.getMimeType
+import com.isidroid.utils.isMimeTypeImage
+import com.isidroid.utils.isMimeTypePdf
+import com.isidroid.utils.saveAsBitmapToFile
+import com.isidroid.utils.savePdfAsBitmapFiles
 import com.isidroid.utils.saveToFile
 import com.isidroid.utils.saveToFile
 import com.isidroid.utils.toBitmap
 import com.isidroid.utils.toBitmap
+import com.isidroid.utils.transformToBitmapFiles
 import dagger.hilt.android.qualifiers.ApplicationContext
 import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.flow
+import timber.log.Timber
 import java.io.File
 import java.io.File
 import java.util.UUID
 import java.util.UUID
 import javax.inject.Inject
 import javax.inject.Inject
@@ -30,23 +37,30 @@ class RenderUseCase @Inject constructor(
 
 
     fun loadSpot() = flow {
     fun loadSpot() = flow {
         val richSpot = spotRepository.getDefaultSpot()
         val richSpot = spotRepository.getDefaultSpot()
-        if (richSpot?.printProfiles.isNullOrEmpty()) throw SpotHasNoPrintProfilesException(context.getString(R.string.error_spot_has_no_printing_profiles))
+        if (richSpot?.printProfiles.isNullOrEmpty()) throw SpotHasNoPrintProfilesException(
+            context.getString(
+                R.string.error_spot_has_no_printing_profiles
+            )
+        )
 
 
         emit(richSpot!!)
         emit(richSpot!!)
     }
     }
 
 
-    fun render(uri: Uri?, containerSize: IntSize?, printProfile: PrintProfile?, renderSettings: RenderSettingsV2?) = flow {
-        uri ?: throw IllegalStateException("Uri is null")
+    fun render(
+        sourceFile: File?,
+        containerSize: IntSize?,
+        printProfile: PrintProfile?,
+        renderSettings: RenderSettingsV2?
+    ) = flow {
+        sourceFile ?: throw IllegalStateException("Uri is null")
         containerSize ?: throw IllegalStateException("Container size is null")
         containerSize ?: throw IllegalStateException("Container size is null")
-        printProfile ?: throw IllegalStateException("Paper is null")
+        printProfile ?: throw IllegalStateException("Profile is null")
         renderSettings ?: throw IllegalStateException("renderSettings is null")
         renderSettings ?: throw IllegalStateException("renderSettings is null")
 
 
         emit(FlowResult.Loading)
         emit(FlowResult.Loading)
 
 
-        val bitmap = uri.toBitmap(context) ?: throw IllegalStateException("Can't create bitmap from uri $uri")
         val file = File.createTempFile(UUID.randomUUID().toString(), ".jpg")
         val file = File.createTempFile(UUID.randomUUID().toString(), ".jpg")
-        bitmap.saveToFile(file)
-        bitmap.recycle()
+        sourceFile.copyTo(file, overwrite = true)
 
 
         val updatedSettings = renderSettings.copy(filePath = file.absolutePath)
         val updatedSettings = renderSettings.copy(filePath = file.absolutePath)
 
 
@@ -71,16 +85,28 @@ class RenderUseCase @Inject constructor(
             marginLeft = printProfile.marginLeft,
             marginLeft = printProfile.marginLeft,
             dpix = printProfile.dpix,
             dpix = printProfile.dpix,
             dpiy = printProfile.dpiy,
             dpiy = printProfile.dpiy,
-            renderSettingsV2 = updatedSettings.copy(canvasWidth = previewContainer.width, canvasHeight = previewContainer.height),
+            renderSettingsV2 = updatedSettings.copy(
+                canvasWidth = previewContainer.width,
+                canvasHeight = previewContainer.height
+            ),
             picture = picture,
             picture = picture,
         )
         )
 
 
         result.saveToFile(file)
         result.saveToFile(file)
 
 
-        val renderResult = RenderResult(width = previewContainer.width, height = previewContainer.height, filePath = file.absolutePath)
+        val renderResult = RenderResult(
+            width = previewContainer.width,
+            height = previewContainer.height,
+            filePath = file.absolutePath
+        )
         emit(FlowResult.Success(renderResult))
         emit(FlowResult.Success(renderResult))
     }
     }
 
 
+    fun prepare(uris: List<Uri>) = flow {
+        emit(FlowResult.Loading)
 
 
+        val files = uris.transformToBitmapFiles(context)
+        emit(FlowResult.Success(files))
+    }
 }
 }
 
 

app/src/main/java/com/isidroid/c23/ui/screen/content/ContentScreen.kt

@@ -61,7 +61,7 @@ fun ContentScreen(
     }
     }
 
 
     LaunchedEffect(state.value.galleryHash) { if (state.value.galleryHash != null) launcher.launch("image/*") }
     LaunchedEffect(state.value.galleryHash) { if (state.value.galleryHash != null) launcher.launch("image/*") }
-    LaunchedEffect(state.value.documentHash) { if (state.value.documentHash != null) launcher.launch("document/pdf") }
+    LaunchedEffect(state.value.documentHash) { if (state.value.documentHash != null) launcher.launch("application/pdf") }
     LaunchedEffect(SIDE_EFFECTS_KEY) {
     LaunchedEffect(SIDE_EFFECTS_KEY) {
         effectFlow?.collect { effect ->
         effectFlow?.collect { effect ->
             when (effect) {
             when (effect) {

app/src/main/java/com/isidroid/c23/ui/screen/render_preview/RenderContract.kt

@@ -26,10 +26,11 @@ class RenderContract {
         data class UpdateRenderSettings(
         data class UpdateRenderSettings(
             @PrintSize val size: Int? = null,
             @PrintSize val size: Int? = null,
             @PrintOrientation val orientation: Int? = null,
             @PrintOrientation val orientation: Int? = null,
-            val increaseCopy: Boolean? = null
+            val increaseCopy: Boolean? = null,
+            val page: Int = -1
         ) : Event
         ) : Event
 
 
-        data class ChangePrintProfile(val profileId: String?) : Event
+        data class ChangePrintProfile(val profileId: String?, val page: Int? = null) : Event
     }
     }
 
 
     sealed interface Effect : ViewSideEffect {
     sealed interface Effect : ViewSideEffect {
@@ -41,8 +42,8 @@ class RenderContract {
 
 
     @Stable
     @Stable
     data class State(
     data class State(
+        val rendering: Boolean = false,
         val renderSettings: RenderSettingsV2 = RenderSettingsV2(),
         val renderSettings: RenderSettingsV2 = RenderSettingsV2(),
-        val uris: List<Uri> = emptyList(),
         val printProfile: PrintProfile? = null,
         val printProfile: PrintProfile? = null,
         val renderSeed: Int = 0,
         val renderSeed: Int = 0,
         @PrintSize val openPrintSize: Int? = null,
         @PrintSize val openPrintSize: Int? = null,
@@ -50,6 +51,7 @@ class RenderContract {
         val openCopies: Int? = null,
         val openCopies: Int? = null,
         var richSpot: RichSpot? = null,
         var richSpot: RichSpot? = null,
         val spotHasNoPrintProfiles: Boolean = false,
         val spotHasNoPrintProfiles: Boolean = false,
-        val printProfilesSelector: List<PrintProfile>? = null
+        val printProfilesSelector: List<PrintProfile>? = null,
+        val pageCount: Int = 0
     ) : ViewState
     ) : ViewState
 }
 }
\ No newline at end of file

app/src/main/java/com/isidroid/c23/ui/screen/render_preview/RenderPreviewScreen.kt

@@ -17,8 +17,11 @@ import androidx.compose.material3.Surface
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.State
 import androidx.compose.runtime.State
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.tooling.preview.Devices
 import androidx.compose.ui.tooling.preview.Devices
@@ -58,9 +61,10 @@ fun RenderPreviewScreen(
     val copies = state.value.openCopies
     val copies = state.value.openCopies
     val spotHasNoPrintProfiles = state.value.spotHasNoPrintProfiles
     val spotHasNoPrintProfiles = state.value.spotHasNoPrintProfiles
     val printProfileSelector = state.value.printProfilesSelector
     val printProfileSelector = state.value.printProfilesSelector
-
     val bottomColor = MaterialTheme.colorScheme.secondaryContainer
     val bottomColor = MaterialTheme.colorScheme.secondaryContainer
 
 
+    var pagerPage by remember { mutableIntStateOf(-1) }
+
     LaunchedEffect(SIDE_EFFECTS_KEY) {
     LaunchedEffect(SIDE_EFFECTS_KEY) {
         effectFlow?.collect { effect ->
         effectFlow?.collect { effect ->
             when (effect) {
             when (effect) {
@@ -73,6 +77,8 @@ fun RenderPreviewScreen(
         onEventSent(RenderContract.Event.ToBack)
         onEventSent(RenderContract.Event.ToBack)
     }
     }
 
 
+    if (state.value.rendering) return
+
     when {
     when {
         spotHasNoPrintProfiles -> {
         spotHasNoPrintProfiles -> {
             SpotHasNotPrintProfilesComponent(
             SpotHasNotPrintProfilesComponent(
@@ -86,22 +92,22 @@ fun RenderPreviewScreen(
         printProfileSelector != null -> PrintProfileListSelectorComponent(
         printProfileSelector != null -> PrintProfileListSelectorComponent(
             list = printProfileSelector,
             list = printProfileSelector,
             current = state.value.printProfile,
             current = state.value.printProfile,
-            onChange = { onEventSent(RenderContract.Event.ChangePrintProfile(it)) }
+            onChange = { onEventSent(RenderContract.Event.ChangePrintProfile(it, page = pagerPage)) }
         )
         )
 
 
         openPrintSize != null -> PrintSizeModalComponent(
         openPrintSize != null -> PrintSizeModalComponent(
             currentPrintSize = openPrintSize,
             currentPrintSize = openPrintSize,
-            onSelect = { onEventSent(RenderContract.Event.UpdateRenderSettings(size = it)) }
+            onSelect = { onEventSent(RenderContract.Event.UpdateRenderSettings(size = it, page = pagerPage)) }
         )
         )
 
 
         openOrientation != null -> PrintOrientationModalComponent(
         openOrientation != null -> PrintOrientationModalComponent(
             currentOrientation = openOrientation,
             currentOrientation = openOrientation,
-            onSelect = { onEventSent(RenderContract.Event.UpdateRenderSettings(orientation = it)) }
+            onSelect = { onEventSent(RenderContract.Event.UpdateRenderSettings(orientation = it, page = pagerPage)) }
         )
         )
 
 
         copies != null -> PrintCopiesModalComponent(
         copies != null -> PrintCopiesModalComponent(
             copies = copies,
             copies = copies,
-            onChange = { increaseCopy -> onEventSent(RenderContract.Event.UpdateRenderSettings(increaseCopy = increaseCopy)) },
+            onChange = { increaseCopy -> onEventSent(RenderContract.Event.UpdateRenderSettings(increaseCopy = increaseCopy, page = pagerPage)) },
         )
         )
 
 
     }
     }
@@ -136,7 +142,10 @@ fun RenderPreviewScreen(
                         linkTo(top = parent.top, bottom = paperInfo.top)
                         linkTo(top = parent.top, bottom = paperInfo.top)
                         height = Dimension.fillToConstraints
                         height = Dimension.fillToConstraints
                     },
                     },
-                onPageOpened = { page, containerSize -> onEventSent(RenderContract.Event.OnPageOpened(page, containerSize)) }
+                onPageOpened = { page, containerSize ->
+                    pagerPage = page
+                    onEventSent(RenderContract.Event.OnPageOpened(page, containerSize))
+                }
             )
             )
 
 
             PaperInfoComponent(
             PaperInfoComponent(

app/src/main/java/com/isidroid/c23/ui/screen/render_preview/RenderViewModel.kt

@@ -24,6 +24,7 @@ import kotlinx.coroutines.flow.filterNotNull
 import kotlinx.coroutines.flow.flowOn
 import kotlinx.coroutines.flow.flowOn
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.launch
 import timber.log.Timber
 import timber.log.Timber
+import java.io.File
 import javax.inject.Inject
 import javax.inject.Inject
 import kotlin.random.Random
 import kotlin.random.Random
 
 
@@ -32,6 +33,7 @@ class RenderViewModel @Inject constructor(
     private val useCase: RenderUseCase,
     private val useCase: RenderUseCase,
     savedState: SavedStateHandle
     savedState: SavedStateHandle
 ) : BaseViewModel<RenderContract.Event, RenderContract.State, RenderContract.Effect>() {
 ) : BaseViewModel<RenderContract.Event, RenderContract.State, RenderContract.Effect>() {
+    private var _sourceList: List<File>? = null
     private var _containerSize: IntSize? = null
     private var _containerSize: IntSize? = null
     private var _richSpot: RichSpot? = null
     private var _richSpot: RichSpot? = null
     private val _renderResults = SparseArray<RenderResult>()
     private val _renderResults = SparseArray<RenderResult>()
@@ -42,12 +44,12 @@ class RenderViewModel @Inject constructor(
         viewModelScope.launch {
         viewModelScope.launch {
             savedState.getStateFlow<String?>(Argument.URI, null)
             savedState.getStateFlow<String?>(Argument.URI, null)
                 .filterNotNull()
                 .filterNotNull()
-                .collect { uris -> load(uris) }
+                .collect { uris -> prepareSourceFileList(uris) }
         }
         }
     }
     }
 
 
     override val isDebug: Boolean = isDebug()
     override val isDebug: Boolean = isDebug()
-    override fun setInitialState(): RenderContract.State = RenderContract.State()
+    override fun setInitialState(): RenderContract.State = RenderContract.State(rendering = true)
     override suspend fun handleEvents(event: RenderContract.Event) {
     override suspend fun handleEvents(event: RenderContract.Event) {
         when (event) {
         when (event) {
             RenderContract.Event.Click -> RenderContract.State()
             RenderContract.Event.Click -> RenderContract.State()
@@ -60,27 +62,27 @@ class RenderViewModel @Inject constructor(
 
 
 
 
             is RenderContract.Event.OnPageOpened -> onPageOpened(event.page, event.containerSize)
             is RenderContract.Event.OnPageOpened -> onPageOpened(event.page, event.containerSize)
-            is RenderContract.Event.UpdateRenderSettings -> updateRenderSettings(size = event.size, orientation = event.orientation, increaseCopy = event.increaseCopy)
-            is RenderContract.Event.ChangePrintProfile -> changePrintProfile(event.profileId)
+            is RenderContract.Event.UpdateRenderSettings -> updateRenderSettings(
+                size = event.size,
+                orientation = event.orientation,
+                increaseCopy = event.increaseCopy,
+                page = event.page
+            )
+
+            is RenderContract.Event.ChangePrintProfile -> changePrintProfile(event.profileId, event.page)
         }
         }
     }
     }
 
 
 
 
     // events
     // events
-    private suspend fun load(uris: String) {
-        useCase.loadSpot()
+    private suspend fun prepareSourceFileList(uris: String) {
+        useCase.prepare(uris.split(",").map { it.trim().toUri() })
             .flowOn(Dispatchers.IO)
             .flowOn(Dispatchers.IO)
-            .catchTimber { setState { copy(spotHasNoPrintProfiles = true) } }
-            .collect { richSpot ->
-                _richSpot = richSpot
-                val printProfile = richSpot.printProfiles.first()
-                setState {
-                    copy(
-                        richSpot = richSpot,
-                        uris = uris.split(",").map { it.trim().toUri() },
-                        renderSettings = renderPreviewDefaultSettings(greyscale = printProfile.grayscale),
-                        printProfile = printProfile
-                    )
+            .catchTimber { }
+            .collect { res ->
+                when (res) {
+                    FlowResult.Loading -> setState { copy(rendering = true) }
+                    is FlowResult.Success -> onSourceFileListReady(res.result)
                 }
                 }
             }
             }
     }
     }
@@ -98,7 +100,12 @@ class RenderViewModel @Inject constructor(
         }
         }
 
 
         val state = viewState.value
         val state = viewState.value
-        useCase.render(state.uris.getOrNull(page), size, state.printProfile, state.renderSettings)
+        useCase.render(
+            sourceFile = _sourceList?.get(page),
+            containerSize = size,
+            printProfile = state.printProfile,
+            renderSettings = state.renderSettings
+        )
             .flowOn(Dispatchers.IO)
             .flowOn(Dispatchers.IO)
             .catchTimber { Timber.e(it) }
             .catchTimber { Timber.e(it) }
             .collect { flowResult ->
             .collect { flowResult ->
@@ -109,7 +116,13 @@ class RenderViewModel @Inject constructor(
             }
             }
     }
     }
 
 
-    private suspend fun updateRenderSettings(@PrintSize size: Int?, @PrintOrientation orientation: Int?, increaseCopy: Boolean?, forceRefresh: Boolean = false) {
+    private suspend fun updateRenderSettings(
+        @PrintSize size: Int?,
+        @PrintOrientation orientation: Int?,
+        increaseCopy: Boolean?,
+        forceRefresh: Boolean = false,
+        page: Int? = null
+    ) {
         val refreshRender = (increaseCopy == null && viewState.value.openCopies == null) || forceRefresh
         val refreshRender = (increaseCopy == null && viewState.value.openCopies == null) || forceRefresh
         updateRenderResults(refreshRender)
         updateRenderResults(refreshRender)
 
 
@@ -135,7 +148,7 @@ class RenderViewModel @Inject constructor(
 
 
 
 
         if (refreshRender) {
         if (refreshRender) {
-            onPageOpened(0)
+            onPageOpened(page ?: 0)
         }
         }
     }
     }
 
 
@@ -149,15 +162,37 @@ class RenderViewModel @Inject constructor(
         setEffect { RenderContract.Effect.Navigation.ToBack }
         setEffect { RenderContract.Effect.Navigation.ToBack }
     }
     }
 
 
-    private suspend fun changePrintProfile(profileId: String?) {
+    private suspend fun changePrintProfile(profileId: String?, page: Int?) {
         val printProfile = profileId?.let { _richSpot?.printProfiles?.find { it.id == profileId } } ?: viewState.value.printProfile
         val printProfile = profileId?.let { _richSpot?.printProfiles?.find { it.id == profileId } } ?: viewState.value.printProfile
         setState { copy(printProfilesSelector = null, printProfile = printProfile) }
         setState { copy(printProfilesSelector = null, printProfile = printProfile) }
 
 
         if (profileId != null)
         if (profileId != null)
-            updateRenderSettings(increaseCopy = null, orientation = null, size = null)
+            updateRenderSettings(increaseCopy = null, orientation = null, size = null, page = page)
     }
     }
 
 
     // callbacks
     // callbacks
+    private suspend fun onSourceFileListReady(list: List<File>) {
+        _sourceList = list
+
+        useCase.loadSpot()
+            .flowOn(Dispatchers.IO)
+            .catchTimber { setState { copy(spotHasNoPrintProfiles = true) } }
+            .collect { richSpot ->
+                _richSpot = richSpot
+                val printProfile = richSpot.printProfiles.first()
+
+                setState {
+                    copy(
+                        richSpot = richSpot,
+                        renderSettings = renderPreviewDefaultSettings(greyscale = printProfile.grayscale),
+                        printProfile = printProfile,
+                        pageCount = list.size,
+                        rendering = false
+                    )
+                }
+            }
+    }
+
     private suspend fun onRenderPage(result: RenderResult, page: Int) {
     private suspend fun onRenderPage(result: RenderResult, page: Int) {
         _renderResults[page] = result
         _renderResults[page] = result
         _renderResultsFlow.emit(_renderResults)
         _renderResultsFlow.emit(_renderResults)

app/src/main/java/com/isidroid/c23/ui/screen/render_preview/_component/PagerPreviewComponent.kt

@@ -67,7 +67,7 @@ private fun PagerContent(
     modifier: Modifier,
     modifier: Modifier,
     onPageOpened: (Int) -> Unit,
     onPageOpened: (Int) -> Unit,
 ) {
 ) {
-    val pageCount = state.value.uris.size
+    val pageCount = state.value.pageCount
     val renderResults = renderResultsFlow?.collectAsState(initial = null)
     val renderResults = renderResultsFlow?.collectAsState(initial = null)
     var currentPage by remember { mutableIntStateOf(1) }
     var currentPage by remember { mutableIntStateOf(1) }
 
 

core/utils/src/main/java/com/isidroid/utils/ExtPdf.kt

+package com.isidroid.utils
+
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.pdf.PdfRenderer
+import android.net.Uri
+import timber.log.Timber
+import java.io.File
+
+fun Uri.savePdfAsBitmapFiles(context: Context): List<File>? {
+    val descriptor = context.contentResolver.openFileDescriptor(this, "r") ?: return null
+    val renderer = PdfRenderer(descriptor)
+
+    val result = (0 until renderer.pageCount).mapNotNull { pageNumber ->
+        val page = renderer.openPage(pageNumber)
+        try {
+            val bitmap = Bitmap.createBitmap(page.width, page.height, Bitmap.Config.ARGB_8888)
+            val canvas = Canvas(bitmap)
+            canvas.drawColor(Color.WHITE)
+
+
+            page.render(bitmap, null, null, PdfRenderer.Page.RENDER_MODE_FOR_PRINT)
+            bitmap.saveToTempFile()
+        } catch (t: Throwable) {
+            Timber.e(t)
+            null
+        } finally {
+            page.close()
+        }
+    }
+
+    descriptor.close()
+    renderer.close()
+
+    return result
+}
\ No newline at end of file

core/utils/src/main/java/com/isidroid/utils/ExtUri.kt

 package com.isidroid.utils
 package com.isidroid.utils
 
 
 import android.content.Context
 import android.content.Context
+import android.graphics.Bitmap
 import android.net.Uri
 import android.net.Uri
 import android.provider.MediaStore
 import android.provider.MediaStore
 import android.provider.OpenableColumns
 import android.provider.OpenableColumns
+import android.webkit.MimeTypeMap
+import java.io.File
 import java.text.SimpleDateFormat
 import java.text.SimpleDateFormat
 import java.util.Date
 import java.util.Date
 import java.util.Locale
 import java.util.Locale
+import java.util.UUID
 
 
 fun Uri.getDate(context: Context): Date {
 fun Uri.getDate(context: Context): Date {
     val cursor = context.contentResolver.query(this, null, null, null, null)
     val cursor = context.contentResolver.query(this, null, null, null, null)
@@ -43,3 +47,55 @@ fun Uri.getDate(context: Context): Date {
     cursor?.close()
     cursor?.close()
     return date
     return date
 }
 }
+
+fun Uri.getMimeType(context: Context): String? {
+    var mimeType: String?
+    mimeType = context.contentResolver.getType(this)
+    if (mimeType == null) {
+        val extension = fileExtension
+        if (extension != null) {
+            mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension)
+        }
+    }
+    return mimeType
+}
+
+private val Uri.fileExtension: String?
+    get() {
+        val path = path ?: return null
+        val extension = MimeTypeMap.getFileExtensionFromUrl(Uri.fromFile(File(path)).toString())
+        return extension.ifEmpty { null }
+    }
+
+val String?.isMimeTypePdf get() = this == "application/pdf"
+val String?.isMimeTypeImage get() = this?.startsWith("image/") == true
+
+fun Uri.saveAsBitmapToFile(context: Context): File? {
+    val bitmap = toBitmap(context) ?: return null
+    return bitmap.saveToTempFile()
+}
+
+internal fun Bitmap.saveToTempFile(): File {
+    val file = File.createTempFile(UUID.randomUUID().toString(), ".jpg")
+    saveToFile(file)
+    recycle()
+
+    return file
+}
+
+fun List<Uri>.transformToBitmapFiles(context: Context): List<File> {
+    val uris = this
+    val result = mutableListOf<File>()
+
+    uris.forEach { uri ->
+        val mime = uri.getMimeType(context)
+        val isImage = mime.isMimeTypeImage
+        val isPdf = mime.isMimeTypePdf
+
+        when {
+            isImage -> uri.saveAsBitmapToFile(context)?.also { result.add(it) }
+            isPdf -> uri.savePdfAsBitmapFiles(context)?.also { result.addAll(it) }
+        }
+    }
+    return result
+}
\ No newline at end of file