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ff484d4f69
Start work on flutter/flutter#30726 by adding an alternative win32 shell platform implementation for Windows that is not based on GLFW and that uses LIBANGLE for rendering and native win32 windowing and input. This change does not replace the GLFW implementation but rather runs side by side with it producing a secondary flutter_windows_win32.dll artifact. The following items must be added to attain parity with the GLFW implementation: - Custom task scheduling - Support for keyboard modifier keys - Async texture uploads - Correct high DPI handling on Windows versions < 1703 and will be added in subsequent changes.
75 lines
2.3 KiB
C++
75 lines
2.3 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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#ifndef FLUTTER_SHELL_PLATFORM_WINDOWS_ANGLE_SURFACE_MANAGER_H_
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#define FLUTTER_SHELL_PLATFORM_WINDOWS_ANGLE_SURFACE_MANAGER_H_
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// OpenGL ES and EGL includes
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <EGL/eglplatform.h>
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#include <GLES2/gl2.h>
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#include <GLES2/gl2ext.h>
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// Windows platform specific includes
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#include <windows.h>
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namespace flutter {
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// An manager for inializing ANGLE correctly and using it to create and
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// destroy surfaces
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class AngleSurfaceManager {
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public:
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AngleSurfaceManager();
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~AngleSurfaceManager();
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// Disallow copy/move.
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AngleSurfaceManager(const AngleSurfaceManager&) = delete;
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AngleSurfaceManager& operator=(const AngleSurfaceManager&) = delete;
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// Creates and returns an EGLSurface wrapper and backing DirectX 11 SwapChain
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// asociated with window, in the appropriate format for display in a
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// HWND-backed window.
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EGLSurface CreateSurface(HWND window);
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// queries EGL for the dimensions of surface in physical
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// pixels returning width and height as out params.
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void GetSurfaceDimensions(const EGLSurface surface,
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EGLint* width,
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EGLint* height);
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// Releases the pass-in EGLSurface wrapping and backing resources if not null.
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void DestroySurface(const EGLSurface surface);
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// Binds egl_context_ to the current rendering thread and to the draw and read
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// surfaces returning a boolean result reflecting success.
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bool MakeCurrent(const EGLSurface surface);
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// Swaps the front and back buffers of the DX11 swapchain backing surface if
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// not null.
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EGLBoolean SwapBuffers(const EGLSurface surface);
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private:
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bool Initialize();
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void CleanUp();
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private:
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// EGL representation of native display
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EGLDisplay egl_display_;
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// EGL representation of current rendering context
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EGLContext egl_context_;
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// current frame buffer configuration
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EGLConfig egl_config_;
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// State representing success or failure of display initialization used when
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// creating surfaces.
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bool initialize_succeeded_;
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};
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} // namespace flutter
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#endif // FLUTTER_SHELL_PLATFORM_WINDOWS_ANGLE_SURFACE_MANAGER_H_
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