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[iOS] fixed histogram

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This commit is contained in:
Vadim 2024-02-13 16:58:26 +01:00
parent b4be0cced3
commit 26619ce3de
1 changed files with 48 additions and 20 deletions
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32
lib/screens/metering/components/camera_container/components/camera_preview/components/histogram/widget_histogram.dart
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@ -1,6 +1,7 @@
import 'dart:math';
import 'package:camera/camera.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:lightmeter/res/dimens.dart';
@ -64,6 +65,19 @@ class _CameraHistogramState extends State<CameraHistogram> {
histogramG = List.filled(256, 0);
histogramB = List.filled(256, 0);
switch (defaultTargetPlatform) {
case TargetPlatform.android:
_yuv420toRgb(image);
case TargetPlatform.iOS:
_bgra8888toRgb(image);
default:
}
if (mounted) setState(() {});
});
}
void _yuv420toRgb(CameraImage image) {
final int uvRowStride = image.planes[1].bytesPerRow;
final int uvPixelStride = image.planes[1].bytesPerPixel!;
@ -85,9 +99,23 @@ class _CameraHistogramState extends State<CameraHistogram> {
histogramB[b.round().clamp(0, 255)]++;
}
}
}
if (mounted) setState(() {});
});
void _bgra8888toRgb(CameraImage image) {
for (int i = 0; i < image.planes.first.bytes.length; i++) {
final int channel = i % 4;
switch (channel) {
case 3:
break;
case 2:
histogramR[image.planes.first.bytes[i]]++;
case 1:
histogramG[image.planes.first.bytes[i]]++;
case 0:
histogramB[image.planes.first.bytes[i]]++;
default:
}
}
}
}