Flutter Windows Embedder
compositor_opengl.h
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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 #ifndef FLUTTER_SHELL_PLATFORM_WINDOWS_COMPOSITOR_OPENGL_H_
6 #define FLUTTER_SHELL_PLATFORM_WINDOWS_COMPOSITOR_OPENGL_H_
7 
8 #include <memory>
9 
10 #include "flutter/impeller/renderer/backend/gles/proc_table_gles.h"
11 #include "flutter/shell/platform/embedder/embedder.h"
14 
15 namespace flutter {
16 
17 // Enables the Flutter engine to render content on Windows using OpenGL.
18 class CompositorOpenGL : public Compositor {
19  public:
21  impeller::ProcTableGLES::Resolver resolver);
22 
23  /// |Compositor|
24  bool CreateBackingStore(const FlutterBackingStoreConfig& config,
25  FlutterBackingStore* result) override;
26 
27  /// |Compositor|
28  bool CollectBackingStore(const FlutterBackingStore* store) override;
29 
30  /// |Compositor|
31  bool Present(const FlutterLayer** layers, size_t layers_count) override;
32 
33  private:
34  // The Flutter engine that manages the views to render.
35  FlutterWindowsEngine* engine_;
36 
37  private:
38  // The compositor initializes itself lazily once |CreateBackingStore| is
39  // called. True if initialization completed successfully.
40  bool is_initialized_ = false;
41 
42  // Function used to resolve GLES functions.
43  impeller::ProcTableGLES::Resolver resolver_ = nullptr;
44 
45  // Table of resolved GLES functions. Null until the compositor is initialized.
46  std::unique_ptr<impeller::ProcTableGLES> gl_ = nullptr;
47 
48  // The OpenGL texture target format for backing stores. Invalid value until
49  // the compositor is initialized.
50  uint32_t format_ = 0;
51 
52  // Initialize the compositor. This must run on the raster thread.
53  bool Initialize();
54 
55  // Clear the view's surface and removes any previously presented layers.
56  bool Clear(FlutterWindowsView* view);
57 };
58 
59 } // namespace flutter
60 
61 #endif // FLUTTER_SHELL_PLATFORM_WINDOWS_COMPOSITOR_OPENGL_H_
flutter::CompositorOpenGL::Present
bool Present(const FlutterLayer **layers, size_t layers_count) override
|Compositor|
Definition: compositor_opengl.cc:95
flutter::FlutterWindowsView
Definition: flutter_windows_view.h:34
flutter::CompositorOpenGL::CompositorOpenGL
CompositorOpenGL(FlutterWindowsEngine *engine, impeller::ProcTableGLES::Resolver resolver)
Definition: compositor_opengl.cc:38
flutter::FlutterWindowsEngine
Definition: flutter_windows_engine.h:89
flutter::CompositorOpenGL::CreateBackingStore
bool CreateBackingStore(const FlutterBackingStoreConfig &config, FlutterBackingStore *result) override
|Compositor|
Definition: compositor_opengl.cc:42
flutter::CompositorOpenGL::CollectBackingStore
bool CollectBackingStore(const FlutterBackingStore *store) override
|Compositor|
Definition: compositor_opengl.cc:80
flutter
Definition: accessibility_bridge_windows.cc:11
flutter_windows_engine.h
flutter::CompositorOpenGL
Definition: compositor_opengl.h:18
compositor.h
flutter::Compositor
Definition: compositor.h:20