如何使InkCanvas在UWP的Windows应用程序10的图像？ [英] How to render InkCanvas to an image in UWP Windows 10 application?

问题描述

RenderTargetBitmap 类简单的帆布+ InkManager（在Windows 8.1）合作，使墨水笔画的图像。
UWP介绍 InkCanvas 和新的着墨API。但是，它似乎像 RenderTargetBitmap 不与工作。当我尝试捕捉 RenderAsync 方法笔迹，无油墨招搞定呈现唯一的其他对象，如矩形等。

The RenderTargetBitmap class worked with simple Canvas + InkManager (in Windows 8.1) to render ink strokes to an image. UWP introduced InkCanvas and a new Inking API. However, it seems like the RenderTargetBitmap does not work with that. When I try to capture ink strokes with RenderAsync method, no ink strokes get rendered only other objects like Rectangle and so on.

它是一个bug或者是不是意味着这种新的API使用这种方式？如果没有，那么我怎么能渲染图像了 InkCanvas ？

Is it a bug or this new API is not meant to be used this way? If not, then how can I render an image out of InkCanvas?

谢谢！

推荐答案

下面是我如何解决这一问题Win2D。
：首先， Win2D.uwp 的NuGet包添加到您的项目。
然后用这个代码：

Here is how I solved this issue with Win2D. First of all, add Win2D.uwp nuget package to your project. Then use this code:

CanvasDevice device = CanvasDevice.GetSharedDevice();
CanvasRenderTarget renderTarget = new CanvasRenderTarget(device, (int)inkCanvas.ActualWidth, (int)inkCanvas.ActualHeight, 96);

using (var ds = renderTarget.CreateDrawingSession())
{
    ds.Clear(Colors.White);
    ds.DrawInk(inkCanvas.InkPresenter.StrokeContainer.GetStrokes());
}

using (var fileStream = await file.OpenAsync(FileAccessMode.ReadWrite))
    await renderTarget.SaveAsync(fileStream, CanvasBitmapFileFormat.Jpeg, 1f);

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