public void Draw(BitmapCanvas canvas, DenseMatrix parentMatrix, byte parentAlpha)
{
LottieLog.BeginSection("GradientFillContent.Draw");
_path.Reset();
for (var i = 0; i < _paths.Count; i++)
{
_path.AddPath(_paths[i].Path, parentMatrix);
}
_path.ComputeBounds(out _boundsRect);
Shader shader;
if (_type == GradientType.Linear)
{
shader = LinearGradient;
}
else
{
shader = RadialGradient;
}
_shaderMatrix.Set(parentMatrix);
shader.LocalMatrix = _shaderMatrix;
_paint.Shader = shader;
var alpha = (byte)(parentAlpha / 255f * _opacityAnimation.Value / 100f * 255);
_paint.Alpha = alpha;
canvas.DrawPath(_path, _paint);
LottieLog.EndSection("GradientFillContent.Draw");
}
public CanvasCommandList GetCanvasImage(ICanvasResourceCreator resourceCreator, float scaleX, float scaleY)
{
lock (this)
{
var commandList = new CanvasCommandList(resourceCreator);
using (var session = commandList.CreateDrawingSession())
{
var width = _composition.Bounds.Width * scaleX;
var height = _composition.Bounds.Height * scaleY;
if (_bitmapCanvas == null || _bitmapCanvas.Width < width || _bitmapCanvas.Height < height)
{
_bitmapCanvas?.Dispose();
_bitmapCanvas = new BitmapCanvas(width, height);
}
using (_bitmapCanvas.CreateSession(resourceCreator.Device, (float)width,
(float)height, session))
{
_bitmapCanvas.Clear(Colors.Transparent);
LottieLog.BeginSection("Drawable.Draw");
if (_compositionLayer == null)
{
return(null);
}
_matrix.Reset();
_matrix = MatrixExt.PreScale(_matrix, scaleX, scaleY);
_compositionLayer.Draw(_bitmapCanvas, _matrix, _alpha);
LottieLog.EndSection("Drawable.Draw");
}
}
return(commandList);
}
}
public override void DrawLayer(BitmapCanvas canvas, Matrix3X3 parentMatrix, byte parentAlpha)
{
LottieLog.BeginSection("CompositionLayer.Draw");
canvas.GetClipBounds(out _originalClipRect);
RectExt.Set(ref _newClipRect, 0, 0, LayerModel.PreCompWidth, LayerModel.PreCompHeight);
parentMatrix.MapRect(ref _newClipRect);
for (var i = _layers.Count - 1; i >= 0; i--)
{
var nonEmptyClip = true;
if (!_newClipRect.IsEmpty)
{
nonEmptyClip = canvas.ClipRect(_newClipRect);
}
if (nonEmptyClip)
{
var layer = _layers[i];
layer.Draw(canvas, parentMatrix, parentAlpha);
}
}
if (!_originalClipRect.IsEmpty)
{
canvas.ClipReplaceRect(_originalClipRect);
}
LottieLog.EndSection("CompositionLayer.Draw");
}
//public int Opacity
//{
// get
// {
// return PixelFormat.TRANSLUCENT;
// }
//}
private void CanvasControlOnDraw(ICanvasAnimatedControl canvasControl, CanvasAnimatedDrawEventArgs args)
{
lock (this)
{
using (_bitmapCanvas.CreateSession(canvasControl.Device, canvasControl.Size.Width, canvasControl.Size.Height, args.DrawingSession))
{
_bitmapCanvas.Clear(Colors.Transparent);
LottieLog.BeginSection("Drawable.Draw");
if (_compositionLayer == null)
{
return;
}
var scale = _scale;
float extraScale = 1f;
float maxScale = GetMaxScale(_bitmapCanvas);
if (scale > maxScale)
{
scale = maxScale;
extraScale = _scale / scale;
}
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)_composition.Bounds.Width / 2f;
float halfHeight = (float)_composition.Bounds.Height / 2f;
float scaledHalfWidth = halfWidth * scale;
float scaledHalfHeight = halfHeight * scale;
_bitmapCanvas.Translate(
Scale * halfWidth - scaledHalfWidth,
Scale * halfHeight - scaledHalfHeight);
_bitmapCanvas.Scale(extraScale, extraScale, scaledHalfWidth, scaledHalfHeight);
}
_matrix.Reset();
_matrix = MatrixExt.PreScale(_matrix, scale, scale);
_compositionLayer.Draw(_bitmapCanvas, _matrix, _alpha);
LottieLog.EndSection("Drawable.Draw");
if (extraScale > 1)
{
_bitmapCanvas.Restore();
}
}
}
}
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 int Opacity
//{
// get
// {
// return PixelFormat.TRANSLUCENT;
// }
//}
private void CanvasControlOnDraw(ICanvasAnimatedControl canvasControl, CanvasAnimatedDrawEventArgs args)
{
lock (this)
{
using (_bitmapCanvas.CreateSession(canvasControl.Device, canvasControl.Size.Width, canvasControl.Size.Height, args.DrawingSession))
{
_bitmapCanvas.Clear(Colors.Transparent);
LottieLog.BeginSection("Drawable.Draw");
if (_compositionLayer == null)
{
return;
}
var scale = _scale;
float extraScale = 1f;
var hasExtraScale = false;
float maxScale = GetMaxScale(_bitmapCanvas);
if (_compositionLayer.HasMatte() || _compositionLayer.HasMasks())
{
// Since we can only scale up the animation so much before masks and mattes get clipped, we
// may have to scale the canvas to fake the rest. This isn't a problem for software rendering
// but hardware accelerated scaling is rasterized so it will appear pixelated.
extraScale = scale / maxScale;
scale = Math.Min(scale, maxScale);
// This check fixes some floating point rounding issues.
hasExtraScale = extraScale > 1.001f;
}
if (hasExtraScale)
{
_bitmapCanvas.Save();
// This is extraScale ^2 because what happens is when the scale increases, the intrinsic size
// of the view increases. That causes the drawable to keep growing even though we are only
// rendering to the size of the view in the top left quarter, leaving the rest blank.
// The first scale by extraScale scales up the canvas so that we are back at the original
// size. The second extraScale is what actually has the scaling effect.
float extraScaleSquared = extraScale * extraScale;
int px = (int)(_composition.Bounds.Width * scale / 2f);
int py = (int)(_composition.Bounds.Height * scale / 2f);
_bitmapCanvas.Scale(extraScaleSquared, extraScaleSquared, px, py);
}
_matrix.Reset();
_matrix = MatrixExt.PreScale(_matrix, scale, scale);
_compositionLayer.Draw(_bitmapCanvas, _matrix, _alpha);
if (hasExtraScale)
{
_bitmapCanvas.Restore();
}
LottieLog.EndSection("Drawable.Draw");
}
}
}
public virtual void Draw(BitmapCanvas canvas, Matrix3X3 parentMatrix, byte parentAlpha)
{
LottieLog.BeginSection("FillContent.Draw");
_paint.Color = _colorAnimation.Value;
var alpha = (byte)(parentAlpha / 255f * _opacityAnimation.Value / 100f * 255);
_paint.Alpha = alpha;
_path.Reset();
for (var i = 0; i < _paths.Count; i++)
{
_path.AddPath(_paths[i].Path, parentMatrix);
}
canvas.DrawPath(_path, _paint);
LottieLog.EndSection("FillContent.Draw");
}
//public int Opacity
//{
// get
// {
// return PixelFormat.TRANSLUCENT;
// }
//}
public void Draw(BitmapCanvas canvas)
{
LottieLog.BeginSection("Drawable.Draw");
if (_compositionLayer == null)
{
return;
}
var scale = _scale;
if (_compositionLayer.HasMatte())
{
scale = Math.Min(_scale, GetMaxScale(canvas));
}
_matrix.Reset();
_matrix = MatrixExt.PreScale(_matrix, scale, scale);
_compositionLayer.Draw(canvas, _matrix, _alpha);
LottieLog.EndSection("Drawable.Draw");
}
internal static void ApplyTrimPathIfNeeded(Path path, float startValue, float endValue, float offsetValue)
{
LottieLog.BeginSection("applyTrimPathIfNeeded");
PathMeasure.SetPath(path);
var length = PathMeasure.Length;
if (startValue == 1f && endValue == 0f)
{
LottieLog.EndSection("applyTrimPathIfNeeded");
return;
}
if (length == 0f || Math.Abs(endValue - startValue - 1) < .01)
{
LottieLog.EndSection("applyTrimPathIfNeeded");
return;
}
var start = length * startValue;
var end = length * endValue;
var newStart = Math.Min(start, end);
var newEnd = Math.Max(start, end);
var offset = offsetValue * length;
newStart += offset;
newEnd += offset;
// If the trim path has rotated around the path, we need to shift it back.
if (newStart >= length && newEnd >= length)
{
newStart = MiscUtils.FloorMod(newStart, length);
newEnd = MiscUtils.FloorMod(newEnd, length);
}
if (newStart < 0)
{
newStart = MiscUtils.FloorMod(newStart, length);
}
if (newEnd < 0)
{
newEnd = MiscUtils.FloorMod(newEnd, length);
}
// If the start and end are equals, return an empty path.
if (newStart == newEnd)
{
path.Reset();
LottieLog.EndSection("applyTrimPathIfNeeded");
return;
}
if (newStart >= newEnd)
{
newStart -= length;
}
_tempPath.Reset();
PathMeasure.GetSegment(newStart, newEnd, ref _tempPath, true);
if (newEnd > length)
{
_tempPath2.Reset();
PathMeasure.GetSegment(0, newEnd % length, ref _tempPath2, true);
_tempPath.AddPath(_tempPath2);
}
else if (newStart < 0)
{
_tempPath2.Reset();
PathMeasure.GetSegment(length + newStart, length, ref _tempPath2, true);
_tempPath.AddPath(_tempPath2);
}
path.Set(_tempPath);
LottieLog.EndSection("applyTrimPathIfNeeded");
}