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82097a4268
Reuses the implementation that was previously done for Scene.toImage
(see 20c805c973)
This introduces a breaking API change:
Picture.toImage is now asynchronous and returns a Future<Image>
Fixes https://github.com/flutter/flutter/issues/23621
76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/lib/ui/compositing/scene.h"
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#include "flutter/fml/trace_event.h"
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#include "flutter/lib/ui/painting/image.h"
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#include "flutter/lib/ui/painting/picture.h"
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#include "third_party/skia/include/core/SkImageInfo.h"
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#include "third_party/skia/include/core/SkSurface.h"
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#include "third_party/tonic/converter/dart_converter.h"
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#include "third_party/tonic/dart_args.h"
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#include "third_party/tonic/dart_binding_macros.h"
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#include "third_party/tonic/dart_library_natives.h"
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namespace blink {
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IMPLEMENT_WRAPPERTYPEINFO(ui, Scene);
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#define FOR_EACH_BINDING(V) \
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V(Scene, toImage) \
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V(Scene, dispose)
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DART_BIND_ALL(Scene, FOR_EACH_BINDING)
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fml::RefPtr<Scene> Scene::create(std::shared_ptr<flow::Layer> rootLayer,
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uint32_t rasterizerTracingThreshold,
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bool checkerboardRasterCacheImages,
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bool checkerboardOffscreenLayers) {
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return fml::MakeRefCounted<Scene>(
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std::move(rootLayer), rasterizerTracingThreshold,
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checkerboardRasterCacheImages, checkerboardOffscreenLayers);
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}
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Scene::Scene(std::shared_ptr<flow::Layer> rootLayer,
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uint32_t rasterizerTracingThreshold,
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bool checkerboardRasterCacheImages,
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bool checkerboardOffscreenLayers)
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: m_layerTree(new flow::LayerTree()) {
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m_layerTree->set_root_layer(std::move(rootLayer));
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m_layerTree->set_rasterizer_tracing_threshold(rasterizerTracingThreshold);
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m_layerTree->set_checkerboard_raster_cache_images(
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checkerboardRasterCacheImages);
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m_layerTree->set_checkerboard_offscreen_layers(checkerboardOffscreenLayers);
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}
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Scene::~Scene() {}
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void Scene::dispose() {
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ClearDartWrapper();
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}
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Dart_Handle Scene::toImage(uint32_t width,
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uint32_t height,
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Dart_Handle raw_image_callback) {
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TRACE_EVENT0("flutter", "Scene::toImage");
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if (!m_layerTree) {
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return tonic::ToDart("Scene did not contain a layer tree.");
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}
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auto picture = m_layerTree->Flatten(SkRect::MakeWH(width, height));
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if (!picture) {
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return tonic::ToDart("Could not flatten scene into a layer tree.");
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}
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return Picture::RasterizeToImage(picture, width, height, raw_image_callback);
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}
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std::unique_ptr<flow::LayerTree> Scene::takeLayerTree() {
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return std::move(m_layerTree);
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}
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} // namespace blink
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