SizeUtil.java
/*
* Copyright 2022 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 androidx.camera.core.internal.utils;
import android.util.Size;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
import androidx.camera.core.impl.utils.CompareSizesByArea;
import java.util.Collections;
import java.util.List;
/**
* Utility class for size related operations.
*/
@RequiresApi(21) // TODO(b/200306659): Remove and replace with annotation on package-info.java
public final class SizeUtil {
public static final Size RESOLUTION_ZERO = new Size(0, 0);
public static final Size RESOLUTION_QVGA = new Size(320, 240);
public static final Size RESOLUTION_VGA = new Size(640, 480);
public static final Size RESOLUTION_480P = new Size(720, 480);
public static final Size RESOLUTION_1080P = new Size(1920, 1080);
private SizeUtil() {
}
/**
* Returns the area of the supplied size.
*/
public static int getArea(@NonNull Size size) {
return size.getWidth() * size.getHeight();
}
/**
* Returns {@code true} if the source size area is smaller than the target size area.
* Otherwise, returns {@code false}.
*/
public static boolean isSmallerByArea(@NonNull Size sourceSize, @NonNull Size targetSize) {
return getArea(sourceSize) < getArea(targetSize);
}
/**
* Returns {@code true} if any edge of the source size is longer than the corresponding edge of
* the target size. Otherwise, returns {@code false}.
*/
public static boolean isLongerInAnyEdge(@NonNull Size sourceSize, @NonNull Size targetSize) {
return sourceSize.getWidth() > targetSize.getWidth()
|| sourceSize.getHeight() > targetSize.getHeight();
}
/**
* Returns the size which has the max area in the input size list. Returns null if the input
* size list is empty.
*/
@Nullable
public static Size getMaxSize(@NonNull List<Size> sizeList) {
if (sizeList.isEmpty()) {
return null;
}
return Collections.max(sizeList, new CompareSizesByArea());
}
}