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vvb2060
@@ -1,233 +0,0 @@
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package com.topjohnwu.magisk.utils
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import android.graphics.Bitmap
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import android.graphics.Canvas
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import android.graphics.Paint
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import android.graphics.Rect
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import android.graphics.drawable.BitmapDrawable
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import android.graphics.drawable.Drawable
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import android.graphics.drawable.PictureDrawable
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import android.graphics.drawable.ShapeDrawable
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import android.net.Uri
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import android.text.Spanned
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import android.text.style.DynamicDrawableSpan
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import android.widget.TextView
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import androidx.annotation.WorkerThread
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import com.caverock.androidsvg.SVG
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import com.caverock.androidsvg.SVGParseException
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import com.topjohnwu.magisk.di.AppContext
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import com.topjohnwu.superuser.internal.WaitRunnable
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import io.noties.markwon.AbstractMarkwonPlugin
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import io.noties.markwon.MarkwonSpansFactory
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import io.noties.markwon.image.*
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import io.noties.markwon.image.data.DataUriSchemeHandler
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import io.noties.markwon.image.network.OkHttpNetworkSchemeHandler
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import kotlinx.coroutines.*
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import okhttp3.OkHttpClient
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import org.commonmark.node.Image
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import timber.log.Timber
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import java.io.InputStream
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// Differences with Markwon stock ImagePlugin:
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//
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// We assume beforeSetText() will be run in a background thread, and in that method
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// we download/decode all drawables before sending the spanned markdown CharSequence
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// to the next stage. We also get our surrounding TextView width to properly
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// resize our images.
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//
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// This is required for PrecomputedText to properly take the images into account
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// when precomputing the metrics of TextView
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//
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// Basically, we want nothing to do with AsyncDrawable
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class MarkwonImagePlugin(okHttp: OkHttpClient) : AbstractMarkwonPlugin() {
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override fun configureSpansFactory(builder: MarkwonSpansFactory.Builder) {
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builder.setFactory(Image::class.java) { _, props ->
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val dest = ImageProps.DESTINATION.require(props)
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val size = ImageProps.IMAGE_SIZE.get(props)
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ImageSpan(dest, size)
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}
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}
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@WorkerThread
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override fun beforeSetText(tv: TextView, markdown: Spanned) {
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if (markdown.isEmpty())
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return
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val spans = markdown.getSpans(0, markdown.length, ImageSpan::class.java)
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if (spans == null || spans.isEmpty())
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return
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// Get TextView sizes before setText() to resize all images
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val wr = WaitRunnable {
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val width = tv.width - tv.paddingLeft - tv.paddingRight
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spans.forEach { it.canvasWidth = width }
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}
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tv.post(wr)
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runBlocking {
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// Wait for drawable to be set
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spans.forEach { it.await() }
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// Wait for canvasWidth to be set
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wr.waitUntilDone()
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}
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}
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private val schemeHandlers = HashMap<String, SchemeHandler>(3)
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private val mediaDecoders = HashMap<String, MediaDecoder>(0)
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private val defaultMediaDecoder = DefaultMediaDecoder.create()
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init {
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addSchemeHandler(DataUriSchemeHandler.create())
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addSchemeHandler(OkHttpNetworkSchemeHandler.create(okHttp))
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addMediaDecoder(SVGDecoder())
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}
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private fun addSchemeHandler(schemeHandler: SchemeHandler) {
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for (scheme in schemeHandler.supportedSchemes()) {
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schemeHandlers[scheme] = schemeHandler
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}
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}
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private fun addMediaDecoder(mediaDecoder: MediaDecoder) {
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for (type in mediaDecoder.supportedTypes()) {
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mediaDecoders[type] = mediaDecoder
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}
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}
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// Modified from AsyncDrawableLoaderImpl.execute(asyncDrawable)
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fun loadDrawable(destination: String): Drawable? {
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val uri = Uri.parse(destination)
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var drawable: Drawable? = null
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try {
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val scheme = uri.scheme
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check(scheme != null && scheme.isNotEmpty()) {
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"No scheme is found: $destination"
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}
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// obtain scheme handler
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val schemeHandler = schemeHandlers[scheme]
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?: throw IllegalStateException("No scheme-handler is found: $destination")
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// handle scheme
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val imageItem = schemeHandler.handle(destination, uri)
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// if resulting imageItem needs further decoding -> proceed
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drawable = if (imageItem.hasDecodingNeeded()) {
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val withDecodingNeeded = imageItem.asWithDecodingNeeded
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val mediaDecoder = mediaDecoders[withDecodingNeeded.contentType()]
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?: defaultMediaDecoder
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mediaDecoder.decode(
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withDecodingNeeded.contentType(),
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withDecodingNeeded.inputStream()
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)
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} else {
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imageItem.asWithResult.result()
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}
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} catch (t: Throwable) {
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Timber.e(t, "Error loading image: $destination")
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}
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// apply intrinsic bounds (but only if they are empty)
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if (drawable != null && drawable.bounds.isEmpty)
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DrawableUtils.applyIntrinsicBounds(drawable)
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return drawable
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}
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inner class ImageSpan(
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dest: String,
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private val size: ImageSize?
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) : DynamicDrawableSpan(ALIGN_BOTTOM) {
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var canvasWidth = 0
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private var measured = false
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private lateinit var draw: Drawable
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private val job: Job
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init {
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// Asynchronously download/decode images in the background
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job = GlobalScope.launch(Dispatchers.IO) {
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draw = loadDrawable(dest) ?: ShapeDrawable()
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}
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}
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suspend fun await() = job.join()
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override fun getDrawable() = draw
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private fun defaultBounds(): Rect {
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val bounds: Rect = draw.bounds
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if (!bounds.isEmpty) {
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return bounds
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}
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val intrinsicBounds = DrawableUtils.intrinsicBounds(draw)
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if (!intrinsicBounds.isEmpty) {
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return intrinsicBounds
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}
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return Rect(0, 0, 1, 1)
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}
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private fun measure(paint: Paint) {
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if (measured || canvasWidth == 0)
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return
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measured = true
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val bound =
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SizeResolver.resolveImageSize(size, defaultBounds(), canvasWidth, paint.textSize)
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draw.bounds = bound
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}
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override fun getSize(
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paint: Paint, text: CharSequence?, start: Int, end: Int, fm: Paint.FontMetricsInt?
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): Int {
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measure(paint)
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return super.getSize(paint, text, start, end, fm)
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}
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}
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object SizeResolver : ImageSizeResolverDef() {
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// Expose protected API
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public override fun resolveImageSize(
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imageSize: ImageSize?,
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imageBounds: Rect,
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canvasWidth: Int,
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textSize: Float
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): Rect {
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return super.resolveImageSize(imageSize, imageBounds, canvasWidth, textSize)
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}
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}
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class SVGDecoder: MediaDecoder() {
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override fun supportedTypes() = listOf("image/svg+xml")
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override fun decode(contentType: String?, inputStream: InputStream): Drawable {
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val svg = try {
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SVG.getFromInputStream(inputStream)
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} catch (e: SVGParseException) {
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throw IllegalStateException("Exception decoding SVG", e)
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}
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val w = svg.documentWidth
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val h = svg.documentHeight
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if (w <= 0 || h <= 0) {
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val picture = svg.renderToPicture()
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return PictureDrawable(picture)
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}
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val density: Float = AppContext.resources.displayMetrics.density
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val width = (w * density + .5f).toInt()
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val height = (h * density + .5f).toInt()
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val bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
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val canvas = Canvas(bitmap)
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canvas.scale(density, density)
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svg.renderToCanvas(canvas)
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return BitmapDrawable(AppContext.resources, bitmap)
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}
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}
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}
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