| 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/fml/macros.h"
11 #include "flutter/impeller/renderer/backend/gles/proc_table_gles.h"
12 #include "flutter/shell/platform/embedder/embedder.h"
13 #include "flutter/shell/platform/windows/compositor.h"
14 #include "flutter/shell/platform/windows/flutter_windows_engine.h"
15
16 namespace flutter {
17
18 // Enables the Flutter engine to render content on Windows using OpenGL.
19 class CompositorOpenGL : public Compositor {
20 public:
21 CompositorOpenGL(FlutterWindowsEngine* engine,
22 impeller::ProcTableGLES::Resolver resolver);
23
24 /// |Compositor|
25 bool CreateBackingStore(const FlutterBackingStoreConfig& config,
26 FlutterBackingStore* result) override;
27
28 /// |Compositor|
29 bool CollectBackingStore(const FlutterBackingStore* store) override;
30
31 /// |Compositor|
32 bool Present(FlutterWindowsView* view,
33 const FlutterLayer** layers,
34 size_t layers_count) override;
35
36 private:
37 // The Flutter engine that manages the views to render.
38 FlutterWindowsEngine* engine_;
39
40 private:
41 struct TextureFormat {
42 // The format passed to the engine using `FlutterOpenGLFramebuffer.target`.
43 uint32_t sized_format = 0;
44 // The format used to create textures. Passed to `glTexImage2D`.
45 uint32_t general_format = 0;
46 };
47
48 // The compositor initializes itself lazily once |CreateBackingStore| is
49 // called. True if initialization completed successfully.
50 bool is_initialized_ = false;
51
52 // Function used to resolve GLES functions.
53 impeller::ProcTableGLES::Resolver resolver_ = nullptr;
54
55 // Table of resolved GLES functions. Null until the compositor is initialized.
56 std::unique_ptr<impeller::ProcTableGLES> gl_ = nullptr;
57
58 // The OpenGL texture format for backing stores. Invalid value until
59 // the compositor is initialized.
60 TextureFormat format_;
61
62 // Initialize the compositor. This must run on the raster thread.
63 bool Initialize();
64
65 // Clear the view's surface and removes any previously presented layers.
66 bool Clear(FlutterWindowsView* view);
67
68 FML_DISALLOW_COPY_AND_ASSIGN(CompositorOpenGL);
69 };
70
71 } // namespace flutter
72
73 #endif // FLUTTER_SHELL_PLATFORM_WINDOWS_COMPOSITOR_OPENGL_H_
flutter::FlutterWindowsView
Definition: flutter_windows_view.h:34
flutter::CompositorOpenGL::CompositorOpenGL
CompositorOpenGL(FlutterWindowsEngine *engine, impeller::ProcTableGLES::Resolver resolver)
Definition: compositor_opengl.cc:25
flutter::FlutterWindowsEngine
Definition: flutter_windows_engine.h:90
flutter::CompositorOpenGL::CreateBackingStore
bool CreateBackingStore(const FlutterBackingStoreConfig &config, FlutterBackingStore *result) override
|Compositor|
Definition: compositor_opengl.cc:29
flutter::CompositorOpenGL::CollectBackingStore
bool CollectBackingStore(const FlutterBackingStore *store) override
|Compositor|
Definition: compositor_opengl.cc:68
flutter
Definition: accessibility_bridge_windows.cc:11
flutter::CompositorOpenGL::Present
bool Present(FlutterWindowsView *view, const FlutterLayer **layers, size_t layers_count) override
|Compositor|
Definition: compositor_opengl.cc:83
flutter_windows_engine.h
flutter::CompositorOpenGL
Definition: compositor_opengl.h:19
compositor.h
flutter::Compositor
Definition: compositor.h:22