1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "flutter/lib/ui/compositing/scene.h"
6
7 #include "flutter/fml/trace_event.h"
8 #include "flutter/lib/ui/painting/image.h"
9 #include "flutter/lib/ui/painting/picture.h"
10 #include "third_party/skia/include/core/SkImageInfo.h"
11 #include "third_party/skia/include/core/SkSurface.h"
12
13 namespace flutter {
14
15 IMPLEMENT_WRAPPERTYPEINFO(ui, Scene);
16
17 #define FOR_EACH_BINDING(V) \
18 V(Scene, toImage) \
19 V(Scene, dispose)
20
DART_BIND_ALL(Scene,FOR_EACH_BINDING)21 DART_BIND_ALL(Scene, FOR_EACH_BINDING)
22
23 fml::RefPtr<Scene> Scene::create(std::shared_ptr<flutter::Layer> rootLayer,
24 uint32_t rasterizerTracingThreshold,
25 bool checkerboardRasterCacheImages,
26 bool checkerboardOffscreenLayers) {
27 return fml::MakeRefCounted<Scene>(
28 std::move(rootLayer), rasterizerTracingThreshold,
29 checkerboardRasterCacheImages, checkerboardOffscreenLayers);
30 }
31
Scene(std::shared_ptr<flutter::Layer> rootLayer,uint32_t rasterizerTracingThreshold,bool checkerboardRasterCacheImages,bool checkerboardOffscreenLayers)32 Scene::Scene(std::shared_ptr<flutter::Layer> rootLayer,
33 uint32_t rasterizerTracingThreshold,
34 bool checkerboardRasterCacheImages,
35 bool checkerboardOffscreenLayers)
36 : m_layerTree(new flutter::LayerTree()) {
37 m_layerTree->set_root_layer(std::move(rootLayer));
38 m_layerTree->set_rasterizer_tracing_threshold(rasterizerTracingThreshold);
39 m_layerTree->set_checkerboard_raster_cache_images(
40 checkerboardRasterCacheImages);
41 m_layerTree->set_checkerboard_offscreen_layers(checkerboardOffscreenLayers);
42 }
43
~Scene()44 Scene::~Scene() {}
45
dispose()46 void Scene::dispose() {
47 ClearDartWrapper();
48 }
49
toImage(uint32_t width,uint32_t height,Dart_Handle raw_image_callback)50 Dart_Handle Scene::toImage(uint32_t width,
51 uint32_t height,
52 Dart_Handle raw_image_callback) {
53 TRACE_EVENT0("flutter", "Scene::toImage");
54
55 if (!m_layerTree) {
56 return reinterpret_cast<Dart_Handle>("Scene did not contain a layer tree.");
57 }
58
59 auto picture = m_layerTree->Flatten(SkRect::MakeWH(width, height));
60 if (!picture) {
61 return reinterpret_cast<Dart_Handle>("Could not flatten scene into a layer tree.");
62 }
63
64 return Picture::RasterizeToImage(picture, width, height, raw_image_callback);
65 }
66
takeLayerTree()67 std::unique_ptr<flutter::LayerTree> Scene::takeLayerTree() {
68 return std::move(m_layerTree);
69 }
70
71 } // namespace flutter
72