public class

MeteringRegionCorrection

extends java.lang.Object

 java.lang.Object

↳androidx.camera.camera2.internal.compat.workaround.MeteringRegionCorrection

Gradle dependencies

compile group: 'androidx.camera', name: 'camera-camera2', version: '1.5.0-alpha01'

  • groupId: androidx.camera
  • artifactId: camera-camera2
  • version: 1.5.0-alpha01

Artifact androidx.camera:camera-camera2:1.5.0-alpha01 it located at Google repository (https://maven.google.com/)

Overview

Correct the metering point if necessary. For some devices, Af region coordinates are flipped horizontally by OEM, hence we should flip it to fix the issue.

Summary

Constructors
publicMeteringRegionCorrection(Quirks cameraQuirks)

Methods
public PointFgetCorrectedPoint(MeteringPoint meteringPoint, int meteringMode)

Return corrected normalized point by given MeteringPoint and MeteringMode.

from java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructors

public MeteringRegionCorrection(Quirks cameraQuirks)

Methods

public PointF getCorrectedPoint(MeteringPoint meteringPoint, int meteringMode)

Return corrected normalized point by given MeteringPoint and MeteringMode.

Source

/*
 * 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.camera2.internal.compat.workaround;

import android.graphics.PointF;

import androidx.annotation.NonNull;
import androidx.camera.camera2.internal.compat.quirk.AfRegionFlipHorizontallyQuirk;
import androidx.camera.core.FocusMeteringAction;
import androidx.camera.core.MeteringPoint;
import androidx.camera.core.impl.Quirks;

/**
 * Correct the metering point if necessary. For some devices, Af region coordinates are flipped
 * horizontally by OEM, hence we should flip it to fix the issue.
 */
public class MeteringRegionCorrection {
    private final Quirks mCameraQuirks;
    public MeteringRegionCorrection(@NonNull Quirks cameraQuirks) {
        mCameraQuirks = cameraQuirks;
    }

    /**
     * Return corrected normalized point by given MeteringPoint and MeteringMode.
     */
    @NonNull
    public PointF getCorrectedPoint(@NonNull MeteringPoint meteringPoint,
            @FocusMeteringAction.MeteringMode int meteringMode) {
        if (meteringMode == FocusMeteringAction.FLAG_AF
                && mCameraQuirks.contains(AfRegionFlipHorizontallyQuirk.class)) {
            return new PointF(1f - meteringPoint.getX(), meteringPoint.getY());
        }

        return new PointF(meteringPoint.getX(), meteringPoint.getY());
    }
}