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// 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.
#ifndef FLUTTER_SHELL_PLATFORM_WINDOWS_EGL_MANAGER_H_
#define FLUTTER_SHELL_PLATFORM_WINDOWS_EGL_MANAGER_H_
// OpenGL ES and EGL includes
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <EGL/eglplatform.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
// Windows platform specific includes
#include <d3d11.h>
#include <windows.h>
#include <wrl/client.h>
#include <memory>
#include "flutter/fml/macros.h"
#include "flutter/shell/platform/windows/egl/context.h"
#include "flutter/shell/platform/windows/egl/surface.h"
#include "flutter/shell/platform/windows/egl/window_surface.h"
namespace flutter {
namespace egl {
// A manager for initializing ANGLE correctly and using it to create and
// destroy surfaces
class Manager {
public:
static std::unique_ptr<Manager> Create(bool enable_impeller);
virtual ~Manager();
// Whether the manager is currently valid.
bool IsValid() const;
// Creates an EGL surface that can be used to render a Flutter view into a
// win32 HWND.
//
// After the surface is created, |WindowSurface::SetVSyncEnabled| should be
// called on a thread that can make the surface current.
//
// HWND is the window backing the surface. Width and height are the surface's
// physical pixel dimensions.
//
// Returns nullptr on failure.
virtual std::unique_ptr<WindowSurface> CreateWindowSurface(HWND hwnd,
size_t width,
size_t height);
// Check if the current thread has a context bound.
bool HasContextCurrent();
// Creates a |EGLSurface| from the provided handle.
EGLSurface CreateSurfaceFromHandle(EGLenum handle_type,
EGLClientBuffer handle,
const EGLint* attributes) const;
// Gets the |EGLDisplay|.
EGLDisplay egl_display() const { return display_; };
// Gets the |ID3D11Device| chosen by ANGLE.
bool GetDevice(ID3D11Device** device);
// Get the EGL context used to render Flutter views.
virtual Context* render_context() const;
// Get the EGL context used for async texture uploads.
virtual Context* resource_context() const;
protected:
// Creates a new surface manager retaining reference to the passed-in target
// for the lifetime of the manager.
explicit Manager(bool enable_impeller);
private:
// Number of active instances of Manager
static int instance_count_;
// Initialize the EGL display.
bool InitializeDisplay();
// Initialize the EGL configs.
bool InitializeConfig(bool enable_impeller);
// Initialize the EGL render and resource contexts.
bool InitializeContexts();
// Initialize the D3D11 device.
bool InitializeDevice();
void CleanUp();
// Whether the manager was initialized successfully.
bool is_valid_ = false;
// EGL representation of native display.
EGLDisplay display_ = EGL_NO_DISPLAY;
// EGL framebuffer configuration.
EGLConfig config_ = nullptr;
// The EGL context used to render Flutter views.
std::unique_ptr<Context> render_context_;
// The EGL context used for async texture uploads.
std::unique_ptr<Context> resource_context_;
// The current D3D device.
Microsoft::WRL::ComPtr<ID3D11Device> resolved_device_ = nullptr;
FML_DISALLOW_COPY_AND_ASSIGN(Manager);
};
} // namespace egl
} // namespace flutter
#endif // FLUTTER_SHELL_PLATFORM_WINDOWS_EGL_MANAGER_H_