Linux (Desktop) doesn't show Images ?

[pkarsten]

Hi,

i created an uno App for Android, Desktop, Windows , I'm devloping under windows with Visual Studio 2022)

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i try stream an image from OneDrive, but it doesn't show me the image, now i tried as Source an Asset Image, but it does not show me the image, running on the Linux (Raspberry Pi) Machine, in Emulation for Desktop,Android,Win on my windows machine shows it.

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public BitmapImage DashImage    {
    get ; set;
}

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what i have forgetten? What can i do?

Thanks

[lindexi]

@pkarsten Could you add more info? Such as all your solution code

[pkarsten]

hello lindexi,

here is my code:
https://github.com/pkarsten/UnoDesktopPicture

thanks

[lindexi]

@pkarsten Do you mean the BGImage in SecondPage.xaml do not show anything?

[pkarsten]

Hello Lindexi,
exactly, it shows neither testImage nor BGImage, testimage is in the Assets directory, BGImage is received via a stream

[lindexi]

I can not debug your code, because I fail to download anything.

[pkarsten]

hi lindexi,
i put now my clientid in the git hub code. It works as follow:
When APp starts, it asked for MSAL Auth , after login, put OneDrive Folder containing images in MyService:
folder = await graphService.GetPhotosAndImagesFromFolder("/Familienbereich/Bilder");
Click on Mainpage loads the Pictures in a local database, and on second page onClick it will retrieve one pic from database, and stream it from onedrive

as i say, on my Windows 10 develop maschine, with visual studio 2022 it works fine in all emulations, only on the raspberry Pi it doesn't work, and i doesnt kno how can i debug it remotly on the raspberry pi for see what perhaps happens

[lindexi]

@pkarsten Can you sure it can download the image success on the raspberry Pi?

[pkarsten]

Lindexi, i dont know If in Raspberry IT receives the Image, but with the other, Testimage, the Image is in assets folder, and this doesnt Show too on the Raspberry.

[jeromelaban]

Thanks. I just repeated your steps, and it's working for me still.

Let's see what the logs are providing, you can enable them in the App.xaml.cs with :

builder.SetMinimumLevel(LogLevel.Debug);
...
builder.AddFilter("Microsoft.UI.Xaml.Controls.Image", LogLevel.Debug );
builder.AddFilter("Microsoft.UI.Xaml.Media.Imaging", LogLevel.Debug );

[jeromelaban]

what is : framebuffer renderer ?

Framebuffer is a mode to render apps when there's no window manager.

[lindexi]

@pkarsten Can I ask the status? Did you solve the problem?

[pkarsten]

i'm trying install it all new from scratch, with other Raspberry Pi 3 B+

[lindexi]

I install ubuntu to Raspberry Pi 3. And I use kwin_x11 on ubuntu. And I find my application can not show any content before I touch the TouchScreen.

[pkarsten]

Hi lindexi,

adding SkiaSharp.NativeAssets.Linux.NoDependencies , and publishing as

dotnet publish -f net8.0-desktop --runtime linux-arm64 --self-contained

give me a result for the App (https://github.com/pkarsten/MyUnoConsoleApp/):

admin@raspberrypi:/apps/test $ ./MyUnoConsoleApp
Hello, World!
Image width: 5344
Image height: 3008
Image color type: Bgra8888
Image processed and saved as output.jpg
admin@raspberrypi:/apps/test $

What does that mean now? Do I have to use the SKBitmap as image type for my UI app on the Raspberry Linux? BitmapImage still does not work, nothing is displayed. Do I then have to explicitly handle the other image type for SKIA?

[pkarsten]

this time everything was done on the Raspberry, I tried it on 2 different Raspberry Pis, this time without Windows with Visual Studio 2022 in between, unfortunately no picture is displayed, I don't know what to do, maybe try another Linux?

From Scratch ... Having a Raspberry Pi 3 B+

• Getting Started with Uno Platform and the Raspberry Pi
• Raspberry Pi Imager -> 16 GB SD Card -> Raspberry 3B + -> Install Raspberry Pi OS 32 (A Port of Debian Bookworm with Raspberry Desktop)
• SSH -> sudo apt update
• SSH -> sudo apt full-upgrade
• SSH -> sudo reboot
• SSH -> wget -O - https://raw.githubusercontent.com/pjgpetecodes/dotnet8pi/main/install.sh | sudo bash
• SSH -> sudo reboot
• SSH -> dortnet --info:
.NET SDK:
Version: 8.0.302
Commit: ef14e02af8
Workload version: 8.0.300-manifests.f6879a9a
MSBuild version: 17.10.4+10fbfbf2e

Runtime Environment:
 OS Name:     raspbian
 OS Version:  12
 OS Platform: Linux
 RID:         linux-arm
 Base Path:   /opt/dotnet/sdk/8.0.302/

.NET workloads installed:
There are no installed workloads to display.

Host:
  Version:      8.0.6
  Architecture: arm
  Commit:       3b8b000a0e

.NET SDKs installed:
  8.0.302 [/opt/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 8.0.6 [/opt/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 8.0.6 [/opt/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
  None

Environment variables:
  DOTNET_ROOT       [/opt/dotnet]

global.json file:
  Not found

• SSH -> dotnet new --install Uno.Templates

Success: Uno.Templates::5.2.41 installed the following templates:
Template Name Short Name Language Tags
------------------ ------------- -------- ------------------------------------------------------------------------------------------
Cross-Platform ... unolib [C#] Multi-platform/Uno Platform/Library/Android/iOS/Windows/macOS/Linux/WebAssembly
Cross-Platform ... unoapp-uitest [C#] Multi-platform/Uno Platform/UITest/Android/iOS/macOS/WebAssembly
Multi-Platform ... unoapp-uwp [C#] Multi-platform/Uno Platform/Android/iOS/Windows/macOS/Linux/WebAssembly
Uno Maui Embedd... unomauilib [C#] Multi-platform/Uno Platform/Android/iOS/Mac Catalyst/Windows/WinUI
Uno Platform App unoapp [C#] Multi-platform/Uno Platform/Android/iOS/macOS/Mac Catalyst/Windows/Linux/WebAssembly/WinUI

• SSH -> dotnet new unoapp -o HelloPi -platforms "desktop" && cd HelloPi
• SSH -> export DISPLAY=:0
• SSH -> vim MainPage.xaml

Edit MainPage.xaml add image Tag: , and copy Image to the Assets Folder: scp -r '"C:\Users\pkars\source\temp\TheImageFile.jpg"' admin@192.168.20.194:/home/admin/apps/HelloPi/HelloPi/HelloPi/Assets

dotnet publish -f net8.0-desktop -c Release
./HelloPi

If I put login,
builder.SetMinimumLevel(LogLevel.Debug);
...
builder.AddFilter("Microsoft.UI.Xaml.Controls.Image", LogLevel.Debug );
builder.AddFilter("Microsoft.UI.Xaml.Media.Imaging", LogLevel.Debug );

where can i see logs? can't :(

And no Image is Shown :-(

it is exasperating

[pkarsten]

How could I have overlooked that, a small but fine detail .... 😯😔🤐😐

thank you for your patience

[jeromelaban]

This is an interesting information. This would mean that for some reason, parts of the OpenGL support if broken on this device.

[lindexi]

@jeromelaban More interesting information is I find my application can not show any content before I touch the TouchScreen. See #17244 (reply in thread)

[jeromelaban]

This is not a behavior we could reproduce, having some additional logs will help.

[lindexi]

Thank you @jeromelaban . I didn't find anything helpful in the log at the time. The next time I turn on the machine, I will upload the log.