addToScene method Null safety
- SceneBuilder builder
override
Override this method to upload this layer to the engine.
Return the engine layer for retained rendering. When there's no corresponding engine layer, null is returned.
Implementation
@override
void addToScene(ui.SceneBuilder builder) {
assert(shader != null);
assert(maskRect != null);
assert(blendMode != null);
engineLayer = builder.pushShaderMask(
shader!,
maskRect! ,
blendMode!,
oldLayer: _engineLayer as ui.ShaderMaskEngineLayer?,
);
addChildrenToScene(builder);
builder.pop();
}