| // Copyright 2013 The Flutter 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/color_filter_layer.h" |
| |
| namespace flutter { |
| |
| ColorFilterLayer::ColorFilterLayer(sk_sp<SkColorFilter> filter) |
| : filter_(std::move(filter)) {} |
| |
| void ColorFilterLayer::Diff(DiffContext* context, const Layer* old_layer) { |
| DiffContext::AutoSubtreeRestore subtree(context); |
| auto* prev = static_cast<const ColorFilterLayer*>(old_layer); |
| if (!context->IsSubtreeDirty()) { |
| FML_DCHECK(prev); |
| if (filter_ != prev->filter_) { |
| context->MarkSubtreeDirty(context->GetOldLayerPaintRegion(old_layer)); |
| } |
| } |
| |
| DiffChildren(context, prev); |
| |
| context->SetLayerPaintRegion(this, context->CurrentSubtreeRegion()); |
| } |
| |
| void ColorFilterLayer::Preroll(PrerollContext* context, |
| const SkMatrix& matrix) { |
| Layer::AutoPrerollSaveLayerState save = |
| Layer::AutoPrerollSaveLayerState::Create(context); |
| ContainerLayer::Preroll(context, matrix); |
| } |
| |
| void ColorFilterLayer::Paint(PaintContext& context) const { |
| TRACE_EVENT0("flutter", "ColorFilterLayer::Paint"); |
| FML_DCHECK(needs_painting(context)); |
| |
| SkPaint paint; |
| paint.setColorFilter(filter_); |
| |
| Layer::AutoSaveLayer save = |
| Layer::AutoSaveLayer::Create(context, paint_bounds(), &paint); |
| PaintChildren(context); |
| } |
| |
| } // namespace flutter |