BitmapEffect.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.imagecapture;
import static androidx.camera.core.internal.utils.ImageUtil.createBitmapFromPlane;
import static java.util.Objects.requireNonNull;
import android.graphics.Bitmap;
import android.graphics.PixelFormat;
import android.os.Build;
import androidx.annotation.NonNull;
import androidx.annotation.RequiresApi;
import androidx.camera.core.ImageCaptureException;
import androidx.camera.core.ImageProcessor;
import androidx.camera.core.ImageProxy;
import androidx.camera.core.processing.ImageProcessorRequest;
import androidx.camera.core.processing.InternalImageProcessor;
import androidx.camera.core.processing.Operation;
import androidx.camera.core.processing.Packet;
/**
* Applies effect to a {@link Bitmap} and gets a {@link Bitmap} in return.
*
* <p>The output packet will inherited the input packet's metadata, such as the crop rect. The
* metadata of the image returned from the effect is ignored.
*/
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public class BitmapEffect implements Operation<Packet<Bitmap>, Packet<Bitmap>> {
private final InternalImageProcessor mProcessor;
BitmapEffect(InternalImageProcessor imageProcessor) {
mProcessor = imageProcessor;
}
@NonNull
@Override
public Packet<Bitmap> apply(@NonNull Packet<Bitmap> packet) throws ImageCaptureException {
// Process the frame.
ImageProcessor.Response response = mProcessor.safeProcess(new ImageProcessorRequest(
new RgbaImageProxy(packet),
PixelFormat.RGBA_8888));
// Restored it back to a Bitmap packet.
ImageProxy imageOut = response.getOutputImage();
Bitmap bitmapOut = createBitmapFromPlane(
requireNonNull(imageOut).getPlanes(),
imageOut.getWidth(),
imageOut.getHeight());
return Packet.of(
bitmapOut,
requireNonNull(packet.getExif()),
packet.getCropRect(),
packet.getRotationDegrees(),
packet.getSensorToBufferTransform(),
packet.getCameraCaptureResult()
);
}
}