| // 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_DARWIN_IOS_IOS_SWITCHABLE_GL_CONTEXT_H_ |
| #define FLUTTER_SHELL_PLATFORM_DARWIN_IOS_IOS_SWITCHABLE_GL_CONTEXT_H_ |
| |
| #include "flutter/flow/gl_context_switch.h" |
| #include "flutter/fml/macros.h" |
| #include "flutter/fml/memory/thread_checker.h" |
| #include "flutter/fml/memory/weak_ptr.h" |
| |
| @class EAGLContext; |
| |
| namespace flutter { |
| |
| //------------------------------------------------------------------------------ |
| /// The iOS implementation of a |SwitchableGLContext|. |
| /// |
| /// It wraps a pointer to an EAGLContext. When passed in the constructor of the |GLContextSwitch|, |
| /// this EAGLContext is set to current. When the |GLContextSwitch| destroys, the current context |
| /// will be restored to the context before setting this EAGLContext to current. |
| /// |
| /// Note: An |IOSSwitchableGLContext| doesn't retain the EAGLContext. Someone else must retain the |
| /// pointer and outlive all the |IOSSwitchableGLContext|. This object is meant to be only owned by a |
| /// |GLContextSwitch| and should be destroyed when The |GLContectSwitch| destroys. |
| class IOSSwitchableGLContext final : public SwitchableGLContext { |
| public: |
| IOSSwitchableGLContext(EAGLContext* context); |
| |
| bool SetCurrent() override; |
| |
| bool RemoveCurrent() override; |
| |
| private: |
| // These pointers are managed by IOSRendererTarget/IOSContextGL or a 3rd party |
| // plugin that uses gl context. |IOSSwitchableGLContext| should never outlive |
| // those objects. Never release this pointer within this object. |
| EAGLContext* context_; |
| EAGLContext* previous_context_; |
| |
| FML_DECLARE_THREAD_CHECKER(checker); |
| |
| FML_DISALLOW_COPY_AND_ASSIGN(IOSSwitchableGLContext); |
| }; |
| |
| } // namespace flutter |
| |
| #endif |