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fix: offload image compression to background isolate via compute()

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Co-authored-by: derkauzigekoala <79001016+derkauzigekoala@users.noreply.github.com>
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copilot-swe-agent[bot] 2026-03-07 22:49:11 +00:00
parent 8a3bda71e6
commit 3f0c7944b8
1 changed files with 6 additions and 0 deletions
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6
lib/services/storage_service.dart
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@ -113,6 +113,12 @@ class StorageService {
static Future<Uint8List> _compressImage(File source) async { static Future<Uint8List> _compressImage(File source) async {
final bytes = await source.readAsBytes(); final bytes = await source.readAsBytes();
return compute(_compressImageBytes, bytes);
}
/// Performs CPU-intensive image decoding, resizing, and JPEG encoding.
/// Runs in a background isolate via [compute] to avoid blocking the UI thread.
static Uint8List _compressImageBytes(Uint8List bytes) {
final decoded = img.decodeImage(bytes); final decoded = img.decodeImage(bytes);
if (decoded == null) { if (decoded == null) {
throw Exception('Invalid image file.'); throw Exception('Invalid image file.');