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fix: enforce min 2x DPR for TV image transcoding

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close #860
This commit is contained in:
edde746
2026-04-14 05:55:43 +02:00
parent 7ab6b9720f
commit f30e47dbd7
1 changed files with 9 additions and 2 deletions
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lib/utils/plex_image_helper.dart
+9 -2
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@@ -1,6 +1,7 @@
import 'dart:math'; import 'dart:math';
import 'package:flutter/widgets.dart'; import 'package:flutter/widgets.dart';
import '../services/plex_client.dart'; import '../services/plex_client.dart';
import 'platform_detector.dart';
import 'plex_url_helper.dart'; import 'plex_url_helper.dart';
/// Image types for different transcoding strategies /// Image types for different transcoding strategies
@@ -22,6 +23,9 @@ class PlexImageHelper {
static const int _minTranscodedWidth = 160; static const int _minTranscodedWidth = 160;
static const int _minTranscodedHeight = 240; static const int _minTranscodedHeight = 240;
/// Minimum DPR for TV to ensure sharp artwork on large screens
static const double _tvMinDpr = 2.0;
/// Rounds dimensions to cache-friendly values to increase cache hit rate /// Rounds dimensions to cache-friendly values to increase cache hit rate
static (int width, int height) roundDimensions(double width, double height) { static (int width, int height) roundDimensions(double width, double height) {
final roundedWidth = (width / _widthRoundingFactor).ceil() * _widthRoundingFactor; final roundedWidth = (width / _widthRoundingFactor).ceil() * _widthRoundingFactor;
@@ -38,14 +42,17 @@ class PlexImageHelper {
/// (common on Linux X11 with compositor scaling). /// (common on Linux X11 with compositor scaling).
static double effectiveDevicePixelRatio(BuildContext context) { static double effectiveDevicePixelRatio(BuildContext context) {
final reportedDpr = MediaQuery.of(context).devicePixelRatio; final reportedDpr = MediaQuery.of(context).devicePixelRatio;
double dpr;
try { try {
final displayWidth = View.of(context).display.size.width; final displayWidth = View.of(context).display.size.width;
// Scale quality with display resolution: 1920px = baseline (1.0x) // Scale quality with display resolution: 1920px = baseline (1.0x)
final displayBasedDpr = (displayWidth / 1920).clamp(1.0, 3.0); final displayBasedDpr = (displayWidth / 1920).clamp(1.0, 3.0);
return max(reportedDpr, displayBasedDpr); dpr = max(reportedDpr, displayBasedDpr);
} catch (_) { } catch (_) {
return reportedDpr; dpr = reportedDpr;
} }
if (PlatformDetector.isTV()) dpr = max(dpr, _tvMinDpr);
return dpr;
} }
/// Calculates optimal image dimensions based on image type and constraints /// Calculates optimal image dimensions based on image type and constraints