Method drawTileTask

src/layers/DisplayList.cpp:777–793

}

void DisplayList::drawTileTask(const DrawTask& task) const {
  auto surface = surfaceCaches[task.sourceIndex()].get();
  DEBUG_ASSERT(surface != nullptr);
  auto canvas = surface->getCanvas();
  AutoCanvasRestore autoRestore(canvas);
  auto currentZoomScale = ToZoomScaleFloat(_zoomScaleInt, _zoomScalePrecision);
  DEBUG_ASSERT(currentZoomScale != 0.0f);
  auto viewMatrix = Matrix::MakeScale(currentZoomScale);
  auto& tileRect = task.tileRect();
  auto& sourceRect = task.sourceRect();
  auto offsetX = sourceRect.left - tileRect.left;
  auto offsetY = sourceRect.top - tileRect.top;
  viewMatrix.postTranslate(offsetX, offsetY);
  auto clipRect = tileRect;
  clipRect.offset(offsetX, offsetY);
  drawRootLayer(surface, clipRect, viewMatrix, true);
}

void DisplayList::drawScreenTasks(std::vector<DrawTask> screenTasks, Surface* surface,
                                  bool autoClear) const {