private void ClearComposition()
{
RecycleBitmaps();
_compositionLayer = null;
_imageAssetManager = null;
InvalidateSelf();
}
private static void Draw(CanvasDevice device, BitmapCanvas bitmapCanvas, CompositionLayer compositionLayer, Rect bounds, float scale, byte alpha, Matrix3X3 matrix, double width, double height, CanvasDrawingSession canvasDrawingSession)
{
using (bitmapCanvas.CreateSession(device, width, height, canvasDrawingSession))
{
bitmapCanvas.Clear(Colors.Transparent);
LottieLog.BeginSection("Drawable.Draw");
if (compositionLayer == null)
{
return;
}
var localScale = scale;
float extraScale = 1f;
float maxScale = GetMaxScale(bitmapCanvas, bounds);
if (localScale > maxScale)
{
localScale = maxScale;
extraScale = scale / localScale;
}
if (extraScale > 1)
{
// This is a bit tricky...
// We can't draw on a canvas larger than ViewConfiguration.get(context).getScaledMaximumDrawingCacheSize()
// which works out to be roughly the size of the screen because Android can't generate a
// bitmap large enough to render to.
// As a result, we cap the scale such that it will never be wider/taller than the screen
// and then only render in the top left corner of the canvas. We then use extraScale
// to scale up the rest of the scale. However, since we rendered the animation to the top
// left corner, we need to scale up and translate the canvas to zoom in on the top left
// corner.
bitmapCanvas.Save();
float halfWidth = (float)bounds.Width / 2f;
float halfHeight = (float)bounds.Height / 2f;
float scaledHalfWidth = halfWidth * localScale;
float scaledHalfHeight = halfHeight * localScale;
bitmapCanvas.Translate(
scale * halfWidth - scaledHalfWidth,
scale * halfHeight - scaledHalfHeight);
bitmapCanvas.Scale(extraScale, extraScale, scaledHalfWidth, scaledHalfHeight);
}
matrix.Reset();
matrix = MatrixExt.PreScale(matrix, localScale, localScale);
compositionLayer.Draw(bitmapCanvas, matrix, alpha);
LottieLog.EndSection("Drawable.Draw");
if (extraScale > 1)
{
bitmapCanvas.Restore();
}
}
}
public void ClearComposition()
{
RecycleBitmaps();
if (_animator.IsRunning)
{
_animator.Cancel();
}
_composition = null;
_compositionLayer = null;
_imageAssetManager = null;
InvalidateSelf();
}
private void BuildCompositionLayer()
{
_compositionLayer = new CompositionLayer(this, LayerParser.Parse(_composition), _composition.Layers, _composition);
}
private void BuildCompositionLayer()
{
_compositionLayer = new CompositionLayer(this, Layer.Factory.NewInstance(_composition), _composition.Layers, _composition);
}