Can SkiaSharp.Views.Blazor be used in a BlazorWebView in a Maui Blazor Hybrid app? #3185
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The SkiaSharp.Views.Blazor nuget lists frameworks such as:
That is, it does not only list web frameworks such as:
I assumed this meant it could be used inside a Maui Am I wrong? Any attempt to use a
(If this should be possible, then I will upload my simple git repo. Though a working sample would be even better.) |
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Replies: 1 comment 3 replies
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JavaScript [JSImport]/[JSExport] interop with ASP.NET Core Blazor says:
This suggests one of two causes for that fatal error:
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The SkiaSharp Blazor components don't work in MAUI unfortunately. On the web, it is WASM so the code is all in the same process, but in Blazor Server and Maui Hybrid, the web control is a separate process. Where are you planning on using SkiaSharp in the pages? For example, if you want to do photo editing or signature capture or something, you could render a native popup or page or overlay with the SkiaSharp canvas. I don't expect this to work in Hybrid, because the actual native binary for Blazor is just for WASM. So in a hybrid scenario, we would either need an embedded wasm component or somehow do interop with the native platform. Neither of which I think are supported. But, I will also chat with the team to see what we can do in the future. |
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We have highly-detailed dynamically-changing geo-based information on a map. "weather" overlay is one simple example. For performance reasons, it probably is best if we keep that in the Maui (C#) process. I'm just exploring all alternatives. (And it had not occurred to me at first that the heavy use we make of Skia graphic calls each frame might not be performant when Skia is inside the webview.) For our main forms, there is no need for SkiaSharp to be inside BlazorWebView. We'll just size the webview as needed. Let it block the map underneath, or move the map to the side. App is usually run on a 10" tablet. But we also have a "HUD" setup, with pieces of UI scattered around the screen. Otherwise, the "HUD" will be full-screen. But mostly transparent. Both visually and to user taps. |
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Just learned this unfortunate fact WebView2 in WinUI 3:
And from the related, closed, issue:
Sounds like we'll have to keep our HUD as Skia calls. And make its look match whatever we use as app styling in the HTML forms. [From what I read, both Android and iOS are capable of webview transparent background. |
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The SkiaSharp Blazor components don't work in MAUI unfortunately. On the web, it is WASM so the code is all in the same process, but in Blazor Server and Maui Hybrid, the web control is a separate process.
Where are you planning on using SkiaSharp in the pages? For example, if you want to do photo editing or signature capture or something, you could render a native popup or page or overlay with the SkiaSharp canvas.
I don't expect this to work in Hybrid, because the actual native binary for Blazor is just for WASM. So in a hybrid scenario, we would either need an embedded wasm component or somehow do interop with the native platform. Neither of which I think are supported.
But, I will als…