From 5cd34da0c26d03a53a7ae53295dad013f82a646f Mon Sep 17 00:00:00 2001
From: Thibault Deckers <thibault.deckers@gmail.com>
Date: Thu, 21 Jan 2021 15:42:35 +0900
Subject: [PATCH] viewer: prevent raster decoration background bleed

---
 lib/widgets/viewer/visual/raster.dart | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/widgets/viewer/visual/raster.dart b/lib/widgets/viewer/visual/raster.dart
index 3bc3153e7..477ce2ad5 100644
--- a/lib/widgets/viewer/visual/raster.dart
+++ b/lib/widgets/viewer/visual/raster.dart
@@ -185,7 +185,8 @@ class _RasterImageViewState extends State<RasterImageView> {
 
     final viewSize = _displaySize * viewState.scale;
     final decorationOffset = ((viewSize - viewportSize) as Offset) / 2 - viewState.position;
-    final decorationSize = applyBoxFit(BoxFit.none, viewSize, viewportSize).source;
+    // deflate as a quick way to prevent background bleed
+    final decorationSize = (applyBoxFit(BoxFit.none, viewSize, viewportSize).source - Offset(.5, .5)) as Size;
 
     Widget child;
     final background = settings.rasterBackground;