| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License |
| */ |
| |
| package com.android.internal.widget; |
| |
| import android.annotation.Nullable; |
| import android.content.Context; |
| import android.graphics.ImageDecoder; |
| import android.graphics.drawable.Drawable; |
| import android.graphics.drawable.Icon; |
| import android.net.Uri; |
| import android.util.Size; |
| |
| import java.io.IOException; |
| |
| /** A class to extract Drawables from a MessagingStyle/ConversationStyle message. */ |
| public class LocalImageResolver { |
| private static final String TAG = LocalImageResolver.class.getSimpleName(); |
| |
| private static final int MAX_SAFE_ICON_SIZE_PX = 480; |
| |
| /** |
| * Resolve an image from the given Uri using {@link ImageDecoder} |
| */ |
| public static Drawable resolveImage(Uri uri, Context context) throws IOException { |
| final ImageDecoder.Source source = |
| ImageDecoder.createSource(context.getContentResolver(), uri); |
| final Drawable drawable = |
| ImageDecoder.decodeDrawable(source, LocalImageResolver::onHeaderDecoded); |
| return drawable; |
| } |
| |
| /** |
| * Get the drawable from Icon using {@link ImageDecoder} if it contains a Uri, or |
| * using {@link Icon#loadDrawable(Context)} otherwise. This will correctly apply the Icon's, |
| * tint, if present, to the drawable. |
| */ |
| public static Drawable resolveImage(Icon icon, Context context) throws IOException { |
| Uri uri = getResolvableUri(icon); |
| if (uri != null) { |
| Drawable result = resolveImage(uri, context); |
| if (icon.hasTint()) { |
| result.mutate(); |
| result.setTintList(icon.getTintList()); |
| result.setTintBlendMode(icon.getTintBlendMode()); |
| } |
| return result; |
| } |
| return icon.loadDrawable(context); |
| } |
| |
| public static Drawable resolveImage(Uri uri, Context context, int maxWidth, int maxHeight) |
| throws IOException { |
| final ImageDecoder.Source source = |
| ImageDecoder.createSource(context.getContentResolver(), uri); |
| return ImageDecoder.decodeDrawable(source, (decoder, info, unused) -> { |
| final Size size = info.getSize(); |
| if (size.getWidth() > size.getHeight()) { |
| if (size.getWidth() > maxWidth) { |
| final int targetHeight = size.getHeight() * maxWidth / size.getWidth(); |
| decoder.setTargetSize(maxWidth, targetHeight); |
| } |
| } else { |
| if (size.getHeight() > maxHeight) { |
| final int targetWidth = size.getWidth() * maxHeight / size.getHeight(); |
| decoder.setTargetSize(targetWidth, maxHeight); |
| } |
| } |
| }); |
| } |
| |
| private static int getPowerOfTwoForSampleRatio(double ratio) { |
| final int k = Integer.highestOneBit((int) Math.floor(ratio)); |
| return Math.max(1, k); |
| } |
| |
| private static void onHeaderDecoded(ImageDecoder decoder, ImageDecoder.ImageInfo info, |
| ImageDecoder.Source source) { |
| final Size size = info.getSize(); |
| final int originalSize = Math.max(size.getHeight(), size.getWidth()); |
| final double ratio = (originalSize > MAX_SAFE_ICON_SIZE_PX) |
| ? originalSize * 1f / MAX_SAFE_ICON_SIZE_PX |
| : 1.0; |
| decoder.setTargetSampleSize(getPowerOfTwoForSampleRatio(ratio)); |
| } |
| |
| /** |
| * Gets the Uri for this icon, assuming the icon can be treated as a pure Uri. Null otherwise. |
| */ |
| @Nullable |
| public static Uri getResolvableUri(@Nullable Icon icon) { |
| if (icon == null || (icon.getType() != Icon.TYPE_URI |
| && icon.getType() != Icon.TYPE_URI_ADAPTIVE_BITMAP)) { |
| return null; |
| } |
| return icon.getUri(); |
| } |
| } |