How do I load an embedded resource image on Windows platform, as an IImage?

[mstasak]

I'm trying to draw an image on a canvas with code, using approaches from GraphicsView Reference and Draw Graphical Objects (Image). This is working on an Android target, but failing to build for Windows target because the Microsoft.Maui.Graphics.Platform assembly is unavailable.

In documentation this is done using PlatformImage.FromStream, but this static method resides in Microsoft.Maui.Graphics.Platform which seems to be deliberately omitted for the windows/net6.0 platform (I'm trying to build for net6.0-windows10.0.19041) (see PlatformImage.cs).

using System.Reflection;
using Microsoft.Maui.Graphics.Platform;
**// Severity	Code	Description	Project	File	Line	Suppression State
// Error CS0234	The type or namespace name 'Platform' does not exist in the namespace
// 'Microsoft.Maui.Graphics' (are you missing an assembly reference?)	gtest(net6.0-windows10.0.19041)**    F:\dev\maui\gtest\GraphicsDrawable.cs	7	Active

namespace gtest {
   public class GraphicsDrawable : IDrawable {

      public void Draw(ICanvas canvas, RectF dirtyRect) {
         
         // Drawing code goes here
         
         //draw red line: works
         canvas.StrokeColor = Colors.Red;
         canvas.StrokeSize = 6;
         canvas.DrawLine(10, 10, 90, 100);

         //draw an image: works on Android target, build fails on Windows target
         Microsoft.Maui.Graphics.IImage image;
         Assembly assembly = GetType().GetTypeInfo().Assembly;
         using (Stream stream = assembly.GetManifestResourceStream("gtest.Resources.Images.x.jpg")) {
            image = PlatformImage.FromStream(stream);
            **//Severity	Code	Description	Project	File	Line	Suppression State
            //Error CS0103  The name 'PlatformImage' does not exist in the current context
            //gtest(net6.0 - windows10.0.19041)	F:\dev\maui\gtest\GraphicsDrawable.cs   29
            //Active**
         }

         if (image != null) {
            canvas.DrawImage(image, 10, 10, image.Width, image.Height);
         }
      }   
   }
}

[mstasak]

Well, this seemed to work, but it's pretty ugly. Update: worked for .jpg but failed for .svg.

Still hoping to find a "correct" way. Maybe I need to brand my Maui desktop app "NETSTANDARD2_1" somehow? Really feeling clueless now.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
#if MACCATALYST || IOS || ANDROID || TIZEN
   using Microsoft.Maui.Graphics.Platform;
#else
   using Microsoft.Maui.Graphics.Win2D;
#endif

namespace gtest {
   public class GraphicsDrawable : IDrawable {

      public void Draw(ICanvas canvas, RectF dirtyRect) {
         
         // Drawing code goes here
         
         //draw red line
         canvas.StrokeColor = Colors.Red;
         canvas.StrokeSize = 6;
         canvas.DrawLine(10, 10, 90, 100);

         //draw an image
         Microsoft.Maui.Graphics.IImage image;
         Assembly assembly = GetType().GetTypeInfo().Assembly;
         using (Stream stream = assembly.GetManifestResourceStream("gtest.Resources.Images.x.jpg")) {
#if MACCATALYST || IOS || ANDROID || TIZEN
            image = PlatformImage.FromStream(stream);
#else
            // windows platform, so Microsoft.Maui.Graphics.Platform is undefined
            image = (new Microsoft.Maui.Graphics.Win2D.SkiaImageLoadingService()).FromStream(stream);
#endif
         }

         if (image != null) {
            canvas.DrawImage(image, 10, 10, image.Width, image.Height);
         }
      
      }   
   }
}

Seems like the .svg file loaded OK but W2DImage.FromStream could not find some component to render .svg data into a bitmap.

.svg runtime error (from a different project, but same failing code which works if I point at a .jpg resource): System.Runtime.InteropServices.COMException
HResult=0x88982F50
Message=The component cannot be found. (0x88982F50)
Source=System.Private.CoreLib
StackTrace:
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter1.GetResult() at Microsoft.Maui.Graphics.Win2D.W2DImage.<>c__DisplayClass18_0.<<FromStream>b__0>d.MoveNext() at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter1.GetResult()
at Microsoft.Maui.Graphics.Win2D.AsyncPump.Run[T](Func1 asyncMethod) at Microsoft.Maui.Graphics.Win2D.W2DImage.FromStream(Stream stream, ImageFormat format) at Microsoft.Maui.Graphics.Win2D.SkiaImageLoadingService.FromStream(Stream stream, ImageFormat formatHint) at MauiGraphics2DApp.ChessPieceRook.DrawPiece(ICanvas canvas, RectF square) in F:\dev\maui\MauiGraphics2DApp\ChessPieceRook.cs:line 34 at MauiGraphics2DApp.GVDraw1.DrawChessBoard(ICanvas canvas, RectF dirtyRect) in F:\dev\maui\MauiGraphics2DApp\GVDraw1.cs:line 38 at MauiGraphics2DApp.GVDraw1.Draw(ICanvas canvas, RectF dirtyRect) in F:\dev\maui\MauiGraphics2DApp\GVDraw1.cs:line 15 at Microsoft.Maui.Graphics.Win2D.W2DGraphicsView.OnDraw(CanvasControl sender, CanvasDrawEventArgs args) at WinRT._EventSource_global__Windows_Foundation_TypedEventHandler_global__Microsoft_Graphics_Canvas_UI_Xaml_CanvasControl__global__Microsoft_Graphics_Canvas_UI_Xaml_CanvasDrawEventArgs_.EventState.<GetEventInvoke>b__1_0(CanvasControl sender, CanvasDrawEventArgs args) at ABI.Windows.Foundation.TypedEventHandler2.Do_Abi_Invoke[TSenderAbi,TResultAbi](Void* thisPtr, TSenderAbi sender, TResultAbi args)

[mstasak]

Ugh. Tried to start over using Windows App SDK, but apparently it doesn't support any owner-drawn graphics. At least it should support .svg resources. Drawing an updateable 64 square chess board in XAML sounds kind of awful. To date, the new MS XAML platforms aren't working terribly well for me. May have to go play with Uno or Kotlin/Compose...

[Anav0]

Unfortunately just drawing .jpg on canvas on windows is too much for MAUI. They didn't even provide any information about it in the documentation, they just don't care.

It's not like they are billion dollar company