[BUG] [Windows, MAUI] SkiaSharp 3.0-Preview4.1 causes an image to be drawn in a wrong size for some first frames on some high DPI screens (works on 3.0-preview3.1)

[TommiGustafsson-HMP]

Description

On the Windows platform, using .NET MAUI 9.0 Preview 6, SkiaSharp 3.0-preview4.1 has introduced a regression from preview3.1 where SkiaSharp draws images at a wrong size for a few first frames on some high DPI screens.

Screenshots

Please have a look at these screenshots:

SkiaSharp 3.0-preview4.1

SkiaSharp 3.0-preview3.1

Videos

Please have a look at the following videos:

SkiaSharp 3.0-preview4.1

2024-07-29.14-43-00.mp4

1. Download the video.
2. Open the video with VLC Media Player.
3. Move to a place where a window with SkiaSharp background (a scroll) is about to be shown.
4. Press E (move forward one frame) until you see a frame where the background is too small.

SkiaSharp 3.0-preview3.1

2024-07-29.14-45-37.mp4

1. Download the video.
2. Open the video with VLC Media Player.
3. Move to a place where a window with SkiaSharp background (a scroll) is about to be shown.
4. Press E (move forward one frame) until you see the first frame rendered with a scroll background. The scroll is of the right size.

Public reproduction repository

Download a public reproduction repository (.NET MAUI 9.0 Preview 6 with SkiaSharp 3.0-preview 4.1). This will do:
https://github.com/hyvanmielenpelit/iOSMauiSkiaSharpMemoryLeak

Expected Behavior

SkiaSharp will draw all frames in the right size on all high DPI screens. (I have 200% scaling.)

Actual Behavior

SkiaSharp draws some first frames in a wrong size on all high DPI screens. (I have 200% scaling.)

Version of SkiaSharp

Other (Please indicate in the description)

Last Known Good Version of SkiaSharp

Other (Please indicate in the description)

IDE / Editor

Visual Studio (Windows)

Platform / Operating System

Windows

Platform / Operating System Version

Processor: 13th Gen Intel(R) Core(TM) i9-13980HX 2.20 GHz
Installed RAM: 32,0 GB (31,6 GB usable)
System type: 64-bit operating system, x64-based processor
Edition: Windows 11 Pro
Version: 23H2
OS build: 22631.3958
Experience: Windows Feature Experience Pack 1000.22700.1026.0

Display

GPUs

Integrated

Dedicated

Devices

Asus ProArt Studiobook H7604JV

Relevant Screenshots

From public reproduction repository

From GnollHack

I have also a screenshot from our game GnollHack about the problem:

https://github.com/hyvanmielenpelit/GnollHack

Relevant Log Output

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[janne-hmp]

We should check this with .NET MAUI 9.0 RC2 and SkiaSharp 3.0 Preview 5.4 and see if either one has fixed the problem.

[TommiGustafsson-HMP]

It seems that SkiaSharp 3.0 Preview 5.4 has fixed this problem, or it happens very rarely.