Method drawRootLayer

src/layers/DisplayList.cpp:855–879

}

void DisplayList::drawRootLayer(Surface* surface, const Rect& drawRect, const Matrix& viewMatrix,
                                bool autoClear) const {
  DEBUG_ASSERT(surface != nullptr);
  auto canvas = surface->getCanvas();
  auto context = surface->getContext();
  AutoCanvasRestore autoRestore(canvas);
  auto surfaceRect = Rect::MakeWH(surface->width(), surface->height());
  bool fullScreen = drawRect == surfaceRect;
  if (!fullScreen) {
    canvas->clipRect(drawRect);
  }
  if (autoClear) {
    canvas->clear();
  }
  canvas->setMatrix(viewMatrix);
  DrawArgs args(context);
  DEBUG_ASSERT(viewMatrix.invertible());
  Matrix inverse = Matrix::I();
  viewMatrix.invert(&inverse);
  auto renderRect = inverse.mapRect(drawRect);
  renderRect.roundOut();
  args.renderRect = &renderRect;
  args.backgroundContext = _root->createBackgroundContext(context, drawRect, viewMatrix);
  _root->drawLayer(args, canvas, 1.0f, BlendMode::SrcOver);
}

}  // namespace tgfx