SkiaSharp從ImageView加載圖像

Question

我試圖將位圖從ImageView加載到SKCanvasView。 問題在於此圖像已設置了CenterCrop，並且已加載到畫布的圖像太大。 如何使其在ImageView中看起來完全像？

代碼示例：

_skBitmap = ((BitmapDrawable)_frontView.ImageView.Drawable).Bitmap.ToSKBitmap();

並繪制：

private void _canvas_PaintSurface(object sender, SKPaintSurfaceEventArgs e)
    {
        var canvas = e.Surface.Canvas;

        var scale = Resources.DisplayMetrics.Density;

        canvas.Scale(scale);

        if (_skBitmap != null)
        {
            canvas.DrawBitmap(_skBitmap, e.Info.Rect);
        }
    }

Answer 1

如果有人感興趣（就我而言，圖像總是比屏幕寬）：

private void _canvas_PaintSurface(object sender, SKPaintSurfaceEventArgs e)
{
    var canvas = e.Surface.Canvas;

    var scale = Resources.DisplayMetrics.Density;

    canvas.Scale(scale);

    if (_skBitmap != null)
        {
            var factor = scaledSize.Height / _skBitmap.Height;
            var nw = _skBitmap.Width * factor;
            var offset = (scaledSize.Width - nw) / 2;

            var sr = new SKRect(offset, 0, nw + offset, scaledSize.Height);
            canvas.DrawBitmap(_skBitmap, sr);
        }
}