Specify scale type for glide thumbnails.

app/src/main/java/org/thoughtcrime/securesms/components/RecentPhotoViewRail.java

@@ -125,6 +125,7 @@ public class RecentPhotoViewRail extends FrameLayout implements LoaderManager.Lo
               .signature(signature)
               .diskCacheStrategy(DiskCacheStrategy.NONE)
               .transition(DrawableTransitionOptions.withCrossFade())
+              .centerCrop()
               .into(viewHolder.imageView);
 
       viewHolder.imageView.setOnClickListener(v -> {

app/src/main/java/org/thoughtcrime/securesms/components/ThumbnailView.java

@@ -28,6 +28,7 @@ import com.bumptech.glide.request.RequestListener;
 import com.bumptech.glide.request.RequestOptions;
 
 import org.signal.core.util.logging.Log;
+import org.signal.glide.transforms.SignalDownsampleStrategy;
 import org.thoughtcrime.securesms.R;
 import org.thoughtcrime.securesms.blurhash.BlurHash;
 import org.thoughtcrime.securesms.database.AttachmentTable;
@@ -454,6 +455,7 @@ public class ThumbnailView extends FrameLayout {
 
     GlideRequest<Drawable> request = glideRequests.load(new DecryptableUri(uri))
                                                   .diskCacheStrategy(DiskCacheStrategy.NONE)
+                                                  .downsample(SignalDownsampleStrategy.CENTER_OUTSIDE_NO_UPSCALE)
                                                   .listener(listener);
 
     if (animate) {
@@ -486,6 +488,7 @@ public class ThumbnailView extends FrameLayout {
     GlideRequest<Drawable> request = glideRequests.load(model)
                                                   .diskCacheStrategy(DiskCacheStrategy.NONE)
                                                   .placeholder(model.getPlaceholder())
+                                                  .downsample(SignalDownsampleStrategy.CENTER_OUTSIDE_NO_UPSCALE)
                                                   .transition(withCrossFade());
 
     request = override(request, width, height);
@@ -554,6 +557,7 @@ public class ThumbnailView extends FrameLayout {
   private GlideRequest<Drawable> buildThumbnailGlideRequest(@NonNull GlideRequests glideRequests, @NonNull Slide slide) {
     GlideRequest<Drawable> request = applySizing(glideRequests.load(new DecryptableUri(Objects.requireNonNull(slide.getUri())))
                                                     .diskCacheStrategy(DiskCacheStrategy.RESOURCE)
+                                                    .downsample(SignalDownsampleStrategy.CENTER_OUTSIDE_NO_UPSCALE)
                                                     .transition(withCrossFade()));
 
     boolean doNotShowMissingThumbnailImage = Build.VERSION.SDK_INT < 23;

app/src/main/java/org/thoughtcrime/securesms/components/webrtc/CallParticipantView.java

@@ -263,6 +263,7 @@ public class CallParticipantView extends ConstraintLayout {
             .fallback(fallbackPhoto.asCallCard(getContext()))
             .error(fallbackPhoto.asCallCard(getContext()))
             .diskCacheStrategy(DiskCacheStrategy.ALL)
+            .fitCenter()
             .into(pipAvatar);
 
     pipAvatar.setScaleType(contactPhoto == null ? ImageView.ScaleType.CENTER_INSIDE : ImageView.ScaleType.CENTER_CROP);

app/src/main/java/org/thoughtcrime/securesms/conversation/ConversationStickerSuggestionAdapter.java

@@ -68,6 +68,7 @@ public class ConversationStickerSuggestionAdapter extends RecyclerView.Adapter<C
     void bind(@NonNull GlideRequests glideRequests, @NonNull EventListener eventListener, @NonNull StickerRecord sticker) {
       glideRequests.load(new DecryptableUri(sticker.getUri()))
                    .transition(DrawableTransitionOptions.withCrossFade())
+                   .fitCenter()
                    .into(image);
 
       itemView.setOnClickListener(v -> {

app/src/main/java/org/thoughtcrime/securesms/giph/mp4/GiphyMp4ViewHolder.java

@@ -100,6 +100,7 @@ final class GiphyMp4ViewHolder extends MappingViewHolder<GiphyImage> implements
             .placeholder(placeholder)
             .diskCacheStrategy(DiskCacheStrategy.ALL)
             .transition(DrawableTransitionOptions.withCrossFade())
+            .centerCrop()
             .into(stillImage);
   }
 }

app/src/main/java/org/thoughtcrime/securesms/mediasend/MediaSendGifFragment.java

@@ -41,7 +41,7 @@ public class MediaSendGifFragment extends Fragment implements MediaSendPageFragm
     super.onViewCreated(view, savedInstanceState);
 
     uri = getArguments().getParcelable(KEY_URI);
-    GlideApp.with(this).load(new DecryptableStreamUriLoader.DecryptableUri(uri)).into((ImageView) view);
+    GlideApp.with(this).load(new DecryptableStreamUriLoader.DecryptableUri(uri)).fitCenter().into((ImageView) view);
   }
 
   @Override

app/src/main/java/org/thoughtcrime/securesms/revealable/ViewOnceMessageActivity.java

@@ -143,6 +143,7 @@ public class ViewOnceMessageActivity extends PassphraseRequiredActivity implemen
 
     GlideApp.with(this)
             .load(new DecryptableUri(uri))
+            .fitCenter()
             .into(image);
   }
 

app/src/main/java/org/thoughtcrime/securesms/stickers/StickerManagementAdapter.java

@@ -273,6 +273,7 @@ final class StickerManagementAdapter extends SectionedRecyclerViewAdapter<String
 
       glideRequests.load(new DecryptableUri(stickerPack.getCover().getUri()))
                    .transition(DrawableTransitionOptions.withCrossFade())
+                   .fitCenter()
                    .set(ApngOptions.ANIMATE, allowApngAnimation)
                    .into(cover);
 

app/src/main/java/org/thoughtcrime/securesms/stickers/StickerPackPreviewActivity.java

@@ -206,6 +206,7 @@ public final class StickerPackPreviewActivity extends PassphraseRequiredActivity
                                                 : new StickerRemoteUri(cover.getPackId(), cover.getPackKey(), cover.getId());
       GlideApp.with(this).load(model)
               .transition(DrawableTransitionOptions.withCrossFade())
+              .fitCenter()
               .set(ApngOptions.ANIMATE, DeviceProperties.shouldAllowApngStickerAnimation(this))
               .into(coverImage);
     } else {

app/src/main/java/org/thoughtcrime/securesms/stickers/StickerPackPreviewAdapter.java

@@ -82,6 +82,7 @@ public final class StickerPackPreviewAdapter extends RecyclerView.Adapter<Sticke
       glideRequests.load(currentGlideModel)
                    .transition(DrawableTransitionOptions.withCrossFade())
                    .set(ApngOptions.ANIMATE, allowApngAnimation)
+                   .centerInside()
                    .into(image);
 
       image.setOnLongClickListener(v -> {

app/src/main/java/org/thoughtcrime/securesms/stickers/StickerPreviewPopup.java

@@ -40,6 +40,7 @@ final class StickerPreviewPopup extends PopupWindow {
     emojiText.setText(emoji);
     glideRequests.load(stickerGlideModel)
                  .diskCacheStrategy(DiskCacheStrategy.NONE)
+                 .fitCenter()
                  .into(image);
   }
 }

app/src/main/java/org/thoughtcrime/securesms/util/AvatarUtil.java

@@ -58,6 +58,7 @@ public final class AvatarUtil {
     GlideApp.with(target)
             .load(photo)
             .transform(new BlurTransformation(context, 0.25f, BlurTransformation.MAX_RADIUS))
+            .centerCrop()
             .into(new CustomViewTarget<View, Drawable>(target) {
               @Override
               public void onLoadFailed(@Nullable Drawable errorDrawable) {