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fix: resize images in a separate isolate

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This commit is contained in:
Sorunome 2020-10-06 18:22:50 +02:00
commit a113f99135
6 changed files with 131 additions and 113 deletions
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51
lib/utils/room_send_file_extension.dart
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@ -16,11 +16,9 @@
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import 'dart:typed_data';
import 'dart:ui';
import 'package:famedlysdk/famedlysdk.dart';
import 'package:native_imaging/native_imaging.dart' as native;
import 'resize_image.dart';
extension RoomSendFileExtension on Room {
Future<String> sendFileEventWithThumbnail(
@ -33,50 +31,7 @@ extension RoomSendFileExtension on Room {
MatrixFile thumbnail;
try {
if (file is MatrixImageFile) {
await native.init();
var nativeImg = native.Image();
try {
await nativeImg.loadEncoded(file.bytes);
file.width = nativeImg.width();
file.height = nativeImg.height();
} on UnsupportedError {
final dartCodec = await instantiateImageCodec(file.bytes);
final dartFrame = await dartCodec.getNextFrame();
file.width = dartFrame.image.width;
file.height = dartFrame.image.height;
final rgbaData = await dartFrame.image.toByteData();
final rgba = Uint8List.view(
rgbaData.buffer, rgbaData.offsetInBytes, rgbaData.lengthInBytes);
dartFrame.image.dispose();
dartCodec.dispose();
nativeImg.loadRGBA(file.width, file.height, rgba);
}
const max = 800;
if (file.width > max || file.height > max) {
var w = max, h = max;
if (file.width > file.height) {
h = max * file.height ~/ file.width;
} else {
w = max * file.width ~/ file.height;
}
final scaledImg = nativeImg.resample(w, h, native.Transform.lanczos);
nativeImg.free();
nativeImg = scaledImg;
}
final jpegBytes = await nativeImg.toJpeg(75);
file.blurhash = nativeImg.toBlurhash(3, 3);
thumbnail = MatrixImageFile(
bytes: jpegBytes,
name: 'thumbnail.jpg',
mimeType: 'image/jpeg',
width: nativeImg.width(),
height: nativeImg.height(),
);
nativeImg.free();
thumbnail = await resizeImage(file);
if (thumbnail.size > file.size ~/ 2) {
thumbnail = null;