Fix concurrency, lifecycle, performance, and config issues from audit
Concurrency & bitmap lifecycle: - Defer bitmap recycling by one cycle so Compose finishes drawing before native memory is freed (preview bitmaps, thumbnails) - Make galleryPreviewSource @Volatile for cross-thread visibility - Join preview job before recycling source bitmap in cancelGalleryPreview() to prevent use-after-free during CPU blur loop - Add @Volatile to TiltShiftRenderer.currentTexCoords (UI/GL thread race) - Fix error dismiss race with cancellable Job tracking Lifecycle & resource management: - Release GL resources via glSurfaceView.queueEvent (must run on GL thread) - Pause GLSurfaceView when entering gallery preview mode - Shut down captureExecutor in CameraManager.release() (thread leak) - Use WeakReference for lifecycleOwnerRef to avoid Activity GC delay - Fix thumbnail bitmap leak on coroutine cancellation (add to finally) - Guarantee imageProxy.close() in finally block Performance: - Compute gradient mask at 1/4 resolution with bilinear upscale (~93% less per-pixel trig work, ~75% less mask memory) - Precompute cos/sin on CPU, pass as uCosAngle/uSinAngle uniforms (eliminates per-fragment transcendental calls in GLSL) - Unroll 9-tap Gaussian blur kernel (avoids integer-branched weight lookup that de-optimizes on mobile GPUs) - Add 80ms debounce to preview recomputation during slider drags Silent failure fixes: - Check bitmap.compress() return value; report error on failure - Log all loadBitmapFromUri null paths (stream, dimensions, decode) - Surface preview computation errors and ActivityNotFoundException to user - Return boolean from writeExifToUri, log at ERROR level - Wrap gallery preview downscale in try-catch (OOM protection) Config: - Add ACCESS_MEDIA_LOCATION permission (GPS EXIF on Android 10+) - Accept coarse-only location grant for geotags - Remove dead adjustResize (no effect with edge-to-edge) - Set windowBackground to black (eliminates white flash on cold start) - Add values-night theme for dark mode - Remove overly broad ProGuard keeps (CameraX/GMS ship consumer rules) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
parent
12051b2a83
commit
11a79076bc
13 changed files with 292 additions and 159 deletions
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@ -36,6 +36,8 @@ class ImageCaptureHandler(
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private const val TAG = "ImageCaptureHandler"
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/** Maximum decoded image dimension to prevent OOM from huge gallery images. */
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private const val MAX_IMAGE_DIMENSION = 4096
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/** Scale factor for downscaling blur and mask computations. */
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private const val SCALE_FACTOR = 4
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}
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/**
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@ -51,7 +53,7 @@ class ImageCaptureHandler(
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* Captures a photo and applies the tilt-shift effect.
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*
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* Phase 1 (inside suspendCancellableCoroutine / camera callback):
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* decode → rotate → apply effect (synchronous CPU work only)
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* decode -> rotate -> apply effect (synchronous CPU work only)
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*
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* Phase 2 (after continuation resumes, back in coroutine context):
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* save bitmap via PhotoSaver (suspend-safe)
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@ -75,7 +77,6 @@ class ImageCaptureHandler(
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val imageRotation = imageProxy.imageInfo.rotationDegrees
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currentBitmap = imageProxyToBitmap(imageProxy)
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imageProxy.close()
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if (currentBitmap == null) {
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continuation.resume(
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@ -97,6 +98,8 @@ class ImageCaptureHandler(
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continuation.resume(
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CaptureOutcome.Failed(SaveResult.Error("Failed to process image. Please try again.", e))
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)
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} finally {
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imageProxy.close()
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}
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}
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@ -114,8 +117,9 @@ class ImageCaptureHandler(
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return when (captureResult) {
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is CaptureOutcome.Failed -> captureResult.result
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is CaptureOutcome.Processed -> {
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var thumbnail: Bitmap? = null
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try {
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val thumbnail = createThumbnail(captureResult.processed)
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thumbnail = createThumbnail(captureResult.processed)
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val result = photoSaver.saveBitmapPair(
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original = captureResult.original,
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processed = captureResult.processed,
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@ -123,12 +127,14 @@ class ImageCaptureHandler(
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location = location
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)
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if (result is SaveResult.Success) {
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result.copy(thumbnail = thumbnail)
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val output = result.copy(thumbnail = thumbnail)
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thumbnail = null // prevent finally from recycling the returned thumbnail
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output
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} else {
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thumbnail?.recycle()
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result
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}
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} finally {
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thumbnail?.recycle()
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captureResult.original.recycle()
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captureResult.processed.recycle()
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}
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@ -206,7 +212,7 @@ class ImageCaptureHandler(
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/**
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* Processes an existing image from the gallery through the tilt-shift pipeline.
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* Loads the image, applies EXIF rotation, processes the effect, and saves both versions.
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* Loads the image, applies EXIF rotation, processes the effect, and saves the result.
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*/
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suspend fun processExistingImage(
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imageUri: Uri,
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@ -215,6 +221,7 @@ class ImageCaptureHandler(
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): SaveResult = withContext(Dispatchers.IO) {
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var originalBitmap: Bitmap? = null
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var processedBitmap: Bitmap? = null
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var thumbnail: Bitmap? = null
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try {
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originalBitmap = loadBitmapFromUri(imageUri)
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?: return@withContext SaveResult.Error("Failed to load image")
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@ -223,7 +230,7 @@ class ImageCaptureHandler(
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processedBitmap = applyTiltShiftEffect(originalBitmap, blurParams)
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val thumbnail = createThumbnail(processedBitmap)
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thumbnail = createThumbnail(processedBitmap)
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val result = photoSaver.saveBitmap(
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bitmap = processedBitmap,
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@ -232,9 +239,10 @@ class ImageCaptureHandler(
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)
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if (result is SaveResult.Success) {
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result.copy(thumbnail = thumbnail)
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val output = result.copy(thumbnail = thumbnail)
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thumbnail = null // prevent finally from recycling the returned thumbnail
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output
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} else {
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thumbnail?.recycle()
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result
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}
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} catch (e: SecurityException) {
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@ -244,6 +252,7 @@ class ImageCaptureHandler(
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Log.e(TAG, "Gallery image processing failed", e)
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SaveResult.Error("Failed to process image. Please try again.", e)
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} finally {
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thumbnail?.recycle()
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originalBitmap?.recycle()
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processedBitmap?.recycle()
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}
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@ -259,6 +268,14 @@ class ImageCaptureHandler(
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val options = BitmapFactory.Options().apply { inJustDecodeBounds = true }
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context.contentResolver.openInputStream(uri)?.use { stream ->
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BitmapFactory.decodeStream(stream, null, options)
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} ?: run {
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Log.e(TAG, "Could not open input stream for URI (dimensions pass): $uri")
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return null
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}
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if (options.outWidth <= 0 || options.outHeight <= 0) {
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Log.e(TAG, "Image has invalid dimensions: ${options.outWidth}x${options.outHeight}, mime: ${options.outMimeType}")
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return null
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}
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// Calculate sample size to stay within MAX_IMAGE_DIMENSION
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@ -271,9 +288,15 @@ class ImageCaptureHandler(
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// Second pass: decode with sample size
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val decodeOptions = BitmapFactory.Options().apply { inSampleSize = sampleSize }
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context.contentResolver.openInputStream(uri)?.use { stream ->
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val bitmap = context.contentResolver.openInputStream(uri)?.use { stream ->
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BitmapFactory.decodeStream(stream, null, decodeOptions)
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}
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if (bitmap == null) {
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Log.e(TAG, "BitmapFactory.decodeStream returned null for URI: $uri (mime: ${options.outMimeType})")
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}
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bitmap
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} catch (e: SecurityException) {
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Log.e(TAG, "Permission denied loading bitmap from URI", e)
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null
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@ -340,6 +363,9 @@ class ImageCaptureHandler(
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* Applies tilt-shift blur effect to a bitmap.
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* Supports both linear and radial modes.
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*
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* The gradient mask is computed at 1/4 resolution (matching the blur downscale)
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* and upscaled for compositing, reducing peak memory by ~93%.
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*
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* All intermediate bitmaps are tracked and recycled in a finally block
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* so that an OOM or other exception does not leak native memory.
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*/
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@ -351,14 +377,12 @@ class ImageCaptureHandler(
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var scaled: Bitmap? = null
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var blurred: Bitmap? = null
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var blurredFullSize: Bitmap? = null
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var mask: Bitmap? = null
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try {
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result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
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val scaleFactor = 4
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val blurredWidth = width / scaleFactor
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val blurredHeight = height / scaleFactor
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val blurredWidth = width / SCALE_FACTOR
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val blurredHeight = height / SCALE_FACTOR
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scaled = Bitmap.createScaledBitmap(source, blurredWidth, blurredHeight, true)
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@ -370,24 +394,22 @@ class ImageCaptureHandler(
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blurred.recycle()
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blurred = null
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mask = createGradientMask(width, height, params)
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// Compute mask at reduced resolution and upscale to avoid full-res per-pixel trig
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val maskPixels = createGradientMaskPixels(blurredWidth, blurredHeight, params)
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val fullMaskPixels = upscaleMask(maskPixels, blurredWidth, blurredHeight, width, height)
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// Composite: blend original with blurred based on mask
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val pixels = IntArray(width * height)
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val blurredPixels = IntArray(width * height)
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val maskPixels = IntArray(width * height)
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source.getPixels(pixels, 0, width, 0, 0, width, height)
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blurredFullSize.getPixels(blurredPixels, 0, width, 0, 0, width, height)
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mask.getPixels(maskPixels, 0, width, 0, 0, width, height)
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blurredFullSize.recycle()
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blurredFullSize = null
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mask.recycle()
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mask = null
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for (i in pixels.indices) {
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val maskAlpha = (maskPixels[i] and 0xFF) / 255f
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val maskAlpha = (fullMaskPixels[i] and 0xFF) / 255f
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val origR = (pixels[i] shr 16) and 0xFF
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val origG = (pixels[i] shr 8) and 0xFF
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val origB = pixels[i] and 0xFF
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@ -412,16 +434,14 @@ class ImageCaptureHandler(
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scaled?.recycle()
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blurred?.recycle()
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blurredFullSize?.recycle()
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mask?.recycle()
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}
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}
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/**
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* Creates a gradient mask for the tilt-shift effect.
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* Supports both linear and radial modes.
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* Creates a gradient mask as a pixel array at the given dimensions.
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* Returns packed ARGB ints where the blue channel encodes blur amount.
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*/
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private fun createGradientMask(width: Int, height: Int, params: BlurParameters): Bitmap {
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val mask = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
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private fun createGradientMaskPixels(width: Int, height: Int, params: BlurParameters): IntArray {
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val pixels = IntArray(width * height)
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val centerX = width * params.positionX
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@ -437,32 +457,22 @@ class ImageCaptureHandler(
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for (x in 0 until width) {
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val dist = when (params.mode) {
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BlurMode.LINEAR -> {
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// Rotate point around focus center
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val dx = x - centerX
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val dy = y - centerY
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val rotatedY = -dx * sinAngle + dy * cosAngle
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kotlin.math.abs(rotatedY)
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}
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BlurMode.RADIAL -> {
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// Calculate elliptical distance from center
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var dx = x - centerX
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var dy = y - centerY
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// Adjust for screen aspect ratio
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dx *= screenAspect
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// Rotate
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val rotatedX = dx * cosAngle - dy * sinAngle
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val rotatedY = dx * sinAngle + dy * cosAngle
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// Apply ellipse aspect ratio
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val adjustedX = rotatedX / params.aspectRatio
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sqrt(adjustedX * adjustedX + rotatedY * rotatedY)
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}
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}
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// Calculate blur amount based on distance from focus region
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val blurAmount = when {
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dist < focusSize -> 0f
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dist < focusSize + transitionSize -> {
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@ -476,8 +486,48 @@ class ImageCaptureHandler(
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}
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}
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mask.setPixels(pixels, 0, width, 0, 0, width, height)
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return mask
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return pixels
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}
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/**
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* Bilinear upscale of a mask pixel array from small dimensions to full dimensions.
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*/
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private fun upscaleMask(
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smallPixels: IntArray,
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smallW: Int, smallH: Int,
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fullW: Int, fullH: Int
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): IntArray {
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val fullPixels = IntArray(fullW * fullH)
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val xRatio = smallW.toFloat() / fullW
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val yRatio = smallH.toFloat() / fullH
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for (y in 0 until fullH) {
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val srcY = y * yRatio
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val y0 = srcY.toInt().coerceIn(0, smallH - 1)
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val y1 = (y0 + 1).coerceIn(0, smallH - 1)
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val yFrac = srcY - y0
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for (x in 0 until fullW) {
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val srcX = x * xRatio
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val x0 = srcX.toInt().coerceIn(0, smallW - 1)
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val x1 = (x0 + 1).coerceIn(0, smallW - 1)
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val xFrac = srcX - x0
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// Bilinear interpolation on the blue channel (all channels are equal)
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val v00 = smallPixels[y0 * smallW + x0] and 0xFF
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val v10 = smallPixels[y0 * smallW + x1] and 0xFF
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val v01 = smallPixels[y1 * smallW + x0] and 0xFF
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val v11 = smallPixels[y1 * smallW + x1] and 0xFF
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val top = v00 + (v10 - v00) * xFrac
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val bottom = v01 + (v11 - v01) * xFrac
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val gray = (top + (bottom - top) * yFrac).toInt().coerceIn(0, 255)
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fullPixels[y * fullW + x] = (0xFF shl 24) or (gray shl 16) or (gray shl 8) or gray
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}
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}
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return fullPixels
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}
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/**
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