Utilize center-inside transform to ensure proper downsampling of cached images.

app/src/main/java/org/thoughtcrime/securesms/stories/viewer/page/StoryCache.kt

@@ -5,6 +5,7 @@ import android.net.Uri
 import com.bumptech.glide.Priority
 import com.bumptech.glide.request.target.CustomTarget
 import com.bumptech.glide.request.transition.Transition
+import org.signal.core.util.logging.Log
 import org.thoughtcrime.securesms.attachments.Attachment
 import org.thoughtcrime.securesms.database.AttachmentDatabase
 import org.thoughtcrime.securesms.mms.DecryptableStreamUriLoader
@@ -19,6 +20,11 @@ class StoryCache(
   private val glideRequests: GlideRequests,
   private val storySize: StoryDisplay.Size
 ) {
+
+  companion object {
+    private val TAG = Log.tag(StoryCache::class.java)
+  }
+
   private val cache = mutableMapOf<Uri, StoryCacheValue>()
 
   /**
@@ -26,6 +32,8 @@ class StoryCache(
    * downloaded, not images, or already in progress.
    */
   fun prefetch(attachments: List<Attachment>) {
+    Log.d(TAG, "Loading ${attachments.size} attachments at $storySize")
+
     val prefetchableAttachments: List<Attachment> = attachments
       .asSequence()
       .filter { it.uri != null && it.uri !in cache }
@@ -38,8 +46,11 @@ class StoryCache(
         glideRequests
           .load(DecryptableStreamUriLoader.DecryptableUri(attachment.uri!!))
           .priority(Priority.HIGH)
+          .centerInside()
           .into(StoryCacheTarget(attachment.uri!!, storySize))
-      } else null
+      } else {
+        null
+      }
 
       val blurTarget = if (attachment.blurHash != null) {
         glideRequests

app/src/main/java/org/thoughtcrime/securesms/stories/viewer/post/StoryImageLoader.kt

@@ -46,6 +46,7 @@ class StoryImageLoader(
 
   private val imageListener = object : StoryCache.Listener {
     override fun onResourceReady(resource: Drawable) {
+      Log.d(TAG, "Loaded cached resource of size w${resource.intrinsicWidth} x h${resource.intrinsicHeight}")
       postImage.setImageDrawable(resource)
       imageState = LoadState.READY
       notifyListeners()
@@ -89,6 +90,7 @@ class StoryImageLoader(
     GlideApp.with(postImage)
       .load(DecryptableStreamUriLoader.DecryptableUri(imagePost.imageUri))
       .override(storySize.width, storySize.height)
+      .centerInside()
       .addListener(object : RequestListener<Drawable> {
         override fun onLoadFailed(e: GlideException?, model: Any?, target: Target<Drawable>?, isFirstResource: Boolean): Boolean {
           imageState = LoadState.FAILED