Portrait Mode (WIP) #18
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| Original file line number | Diff line number | Diff line change |
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| package co.stonephone.stonecamera.plugins | ||
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| import android.content.ContentResolver | ||
| import android.content.ContentValues | ||
| import android.content.Context | ||
| import android.graphics.Bitmap | ||
| import android.graphics.BitmapFactory | ||
| import android.graphics.Canvas | ||
| import android.graphics.Color | ||
| import android.net.Uri | ||
| import android.os.Environment | ||
| import android.os.SystemClock | ||
| import android.provider.MediaStore | ||
| import android.renderscript.Allocation | ||
| import android.renderscript.Element | ||
| import android.renderscript.RenderScript | ||
| import android.renderscript.ScriptIntrinsicBlur | ||
| import androidx.camera.core.ImageCapture | ||
| import co.stonephone.stonecamera.MyApplication | ||
| import co.stonephone.stonecamera.StoneCameraViewModel | ||
| import co.stonephone.stonecamera.utils.ImageSegmenterHelper | ||
| import com.google.mediapipe.framework.image.BitmapImageBuilder | ||
| import com.google.mediapipe.framework.image.ByteBufferExtractor | ||
| import com.google.mediapipe.tasks.vision.core.RunningMode | ||
| import com.google.mediapipe.tasks.vision.imagesegmenter.ImageSegmenterResult | ||
| import java.io.File | ||
| import java.io.FileOutputStream | ||
| import java.io.OutputStream | ||
| import java.nio.ByteBuffer | ||
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| class PortraitModePlugin : IPlugin, ImageSegmenterHelper.SegmenterListener { | ||
| override val id: String = "portraitModePlugin" | ||
| override val name: String = "Portrait Mode" | ||
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| private lateinit var imageSegmenterHelper: ImageSegmenterHelper | ||
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| // Note the various models available here: /home/izaak/Downloads/selfie_segmenter.tflite. | ||
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| override fun initialize(viewModel: StoneCameraViewModel) { | ||
| imageSegmenterHelper = ImageSegmenterHelper( | ||
| context = MyApplication.getAppContext(), | ||
| runningMode = RunningMode.IMAGE, | ||
| currentModel = ImageSegmenterHelper.MODEL_SELFIE_SEGMENTER, | ||
| currentDelegate = ImageSegmenterHelper.DELEGATE_CPU, | ||
| imageSegmenterListener = this | ||
| ); | ||
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| imageSegmenterHelper.setupImageSegmenter(); | ||
| } | ||
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| //TODO fix image rotation being incorrect after processing | ||
| override fun onImageSaved( | ||
| stoneCameraViewModel: StoneCameraViewModel, | ||
| outputFileResults: ImageCapture.OutputFileResults | ||
| ) { | ||
| val contentResolver: ContentResolver = MyApplication.getAppContext().contentResolver | ||
| val imageUri = outputFileResults.savedUri ?: return | ||
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| // Open the input stream of the original image | ||
| val inputStream = contentResolver.openInputStream(imageUri) | ||
| val bitmap: Bitmap = BitmapFactory.decodeStream(inputStream) | ||
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| val segmentationResults: ImageSegmenterResult = imageSegmenterHelper.segmentImageFile(BitmapImageBuilder(bitmap).build()) ?: return | ||
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| val byteBuffer: ByteBuffer = ByteBufferExtractor.extract(segmentationResults.categoryMask().get()) | ||
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| val blurred = applyBlurBasedOnMask(MyApplication.getAppContext(), imageUri, byteBuffer) ?: return | ||
| blurred.saveImage(MyApplication.getAppContext()) | ||
| inputStream?.close() | ||
| } | ||
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| fun applyBlurBasedOnMask(context: Context, imageUri: Uri, byteBuffer: ByteBuffer): Bitmap? { | ||
| // Step 1: Load the image from URI | ||
| val bitmap = loadBitmapFromUri(context, imageUri) ?: return null | ||
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| // Step 2: Extract the mask from the ByteBuffer (assuming it's a binary mask with the same dimensions as the image) | ||
| val width = bitmap.width | ||
| val height = bitmap.height | ||
| val maskPixels = IntArray(width * height) | ||
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| // Convert ByteBuffer to pixel values (assuming it's a grayscale mask) | ||
| byteBuffer.rewind() // Reset ByteBuffer position | ||
| for (i in 0 until width * height) { | ||
| val pixelValue = byteBuffer.get().toInt() // Get a single byte from the buffer | ||
| maskPixels[i] = if (pixelValue != 0) Color.WHITE else Color.BLACK | ||
| } | ||
|
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| // Step 3: Apply a blur using RenderScript (or RenderEffect if on a newer Android version) | ||
| val rs = RenderScript.create(context) | ||
| val inputAllocation = Allocation.createFromBitmap(rs, bitmap) | ||
| val outputAllocation = Allocation.createTyped(rs, inputAllocation.type) | ||
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| val blurScript = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)) | ||
| blurScript.setRadius(25f) // Adjust blur radius | ||
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| blurScript.setInput(inputAllocation) | ||
| blurScript.forEach(outputAllocation) | ||
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| val blurredBitmap = Bitmap.createBitmap(bitmap.width, bitmap.height, Bitmap.Config.ARGB_8888) | ||
| outputAllocation.copyTo(blurredBitmap) | ||
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| // Step 4: Apply the mask: only blur pixels where the mask is non-zero | ||
| val finalBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888) | ||
| val canvas = Canvas(finalBitmap) | ||
| canvas.drawBitmap(bitmap, 0f, 0f, null) // Draw the original bitmap on the canvas | ||
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| // Apply blur only on mask areas | ||
| for (y in 0 until height) { | ||
| for (x in 0 until width) { | ||
| if (maskPixels[y * width + x] == Color.WHITE) { | ||
| finalBitmap.setPixel(x, y, blurredBitmap.getPixel(x, y)) | ||
| } | ||
| } | ||
| } | ||
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| rs.destroy() // Clean up RenderScript resources | ||
| return finalBitmap | ||
| } | ||
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| fun loadBitmapFromUri(context: Context, uri: Uri): Bitmap? { | ||
| try { | ||
| val inputStream = context.contentResolver.openInputStream(uri) | ||
| return BitmapFactory.decodeStream(inputStream) | ||
| } catch (e: Exception) { | ||
| e.printStackTrace() | ||
| return null | ||
| } | ||
| } | ||
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| fun Bitmap.saveImage(context: Context): Uri? { | ||
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| if (android.os.Build.VERSION.SDK_INT >= 29) { | ||
| val values = ContentValues() | ||
| values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg") | ||
| values.put(MediaStore.Images.Media.DATE_ADDED, System.currentTimeMillis() / 1000) | ||
| values.put(MediaStore.Images.Media.DATE_TAKEN, System.currentTimeMillis()) | ||
| values.put(MediaStore.Images.Media.RELATIVE_PATH, "Pictures/test_pictures") | ||
| values.put(MediaStore.Images.Media.IS_PENDING, true) | ||
| values.put(MediaStore.Images.Media.DISPLAY_NAME, "img_${SystemClock.uptimeMillis()}") | ||
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| val uri: Uri? = | ||
| context.contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values) | ||
| if (uri != null) { | ||
| saveImageToStream(this, context.contentResolver.openOutputStream(uri)) | ||
| values.put(MediaStore.Images.Media.IS_PENDING, false) | ||
| context.contentResolver.update(uri, values, null, null) | ||
| return uri | ||
| } | ||
| } else { | ||
| val directory = | ||
| File(context.getExternalFilesDir(Environment.DIRECTORY_PICTURES).toString() + "_test_pictures") | ||
| if (!directory.exists()) { | ||
| directory.mkdirs() | ||
| } | ||
| val fileName = "img_${SystemClock.uptimeMillis()}"+ ".jpeg" | ||
| val file = File(directory, fileName) | ||
| saveImageToStream(this, FileOutputStream(file)) | ||
| if (file.absolutePath != null) { | ||
| val values = ContentValues() | ||
| values.put(MediaStore.Images.Media.DATA, file.absolutePath) | ||
| // .DATA is deprecated in API 29 | ||
| context.contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values) | ||
| return Uri.fromFile(file) | ||
| } | ||
| } | ||
| return null | ||
| } | ||
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| fun saveImageToStream(bitmap: Bitmap, outputStream: OutputStream?) { | ||
| if (outputStream != null) { | ||
| try { | ||
| bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outputStream) | ||
| outputStream.close() | ||
| } catch (e: Exception) { | ||
| e.printStackTrace() | ||
| } | ||
| } | ||
| } | ||
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| override val settings: List<PluginSetting> = emptyList() // No settings for portrait yet | ||
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| override fun onError(error: String, errorCode: Int) { | ||
| TODO("Not yet implemented") | ||
| } | ||
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| override fun onResults(resultBundle: ImageSegmenterHelper.ResultBundle) { | ||
| TODO("Not yet implemented") | ||
| } | ||
| } | ||
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