flow/layers/layer.cc

// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "flutter/flow/layers/layer.h"

#include "flutter/flow/paint_utils.h"
#include "third_party/skia/include/core/SkColorFilter.h"

namespace flow {

Layer::Layer()
    : parent_(nullptr),
      needs_system_composite_(false),
      has_paint_bounds_(false),
      paint_bounds_() {}

Layer::~Layer() = default;

void Layer::Preroll(PrerollContext* context, const SkMatrix& matrix) {
  if (!has_paint_bounds()) {
    set_paint_bounds(SkRect::MakeEmpty());
  }
}

#if defined(OS_FUCHSIA)
void Layer::UpdateScene(SceneUpdateContext& context, mozart::Node* container) {}
#endif

Layer::AutoSaveLayer::AutoSaveLayer(const PaintContext& paint_context,
                                    const SkRect& bounds,
                                    const SkPaint* paint)
    : paint_context_(paint_context),
      bounds_(bounds) {
  paint_context_.canvas.saveLayer(bounds_, paint);
}

Layer::AutoSaveLayer::AutoSaveLayer(const PaintContext& paint_context,
                                    const SkCanvas::SaveLayerRec& layer_rec)
    : paint_context_(paint_context),
      bounds_(*layer_rec.fBounds) {
  paint_context_.canvas.saveLayer(layer_rec);
}

Layer::AutoSaveLayer::~AutoSaveLayer() {
  if (paint_context_.checkerboard_offscreen_layers) {
    DrawCheckerboard(&paint_context_.canvas, bounds_);
  }
  paint_context_.canvas.restore();
}

}  // namespace flow