context.h

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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_CONTEXT_H_
#define FLUTTER_SHELL_PLATFORM_WINDOWS_EGL_CONTEXT_H_
 
#include <EGL/egl.h>
 
#include "flutter/fml/macros.h"
 
namespace flutter {
namespace egl {
 
// An EGL context to interact with OpenGL.
//
// This enables automatic error logging and mocking.
//
// Flutter Windows uses this to create render and resource contexts.
class Context {
 public:
  Context(EGLDisplay display, EGLContext context);
  ~Context();
 
  // Check if this context is currently bound to the thread.
  virtual bool IsCurrent() const;
 
  // Bind the context to the thread without any read or draw surfaces.
  //
  // Returns true on success.
  virtual bool MakeCurrent() const;
 
  // Unbind any context and surfaces from the thread.
  //
  // Returns true on success.
  virtual bool ClearCurrent() const;
 
  // Get the raw EGL context.
  virtual const EGLContext& GetHandle() const;
 
 private:
  EGLDisplay display_ = EGL_NO_DISPLAY;
  EGLContext context_ = EGL_NO_CONTEXT;
 
  FML_DISALLOW_COPY_AND_ASSIGN(Context);
};
 
}  // namespace egl
}  // namespace flutter
 
#endif  // FLUTTER_SHELL_PLATFORM_WINDOWS_EGL_CONTEXT_H_