| // Copyright (c) 2012 The Chromium 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 UI_GL_SCOPED_MAKE_CURRENT_H_ |
| #define UI_GL_SCOPED_MAKE_CURRENT_H_ |
| |
| #include "base/compiler_specific.h" |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/optional.h" |
| #include "ui/gl/gl_export.h" |
| |
| namespace gl { |
| class GLContext; |
| class GLSurface; |
| } |
| |
| namespace ui { |
| |
| // ScopedMakeCurrent makes given context current with the given surface. If this |
| // fails, Succeeded() returns false. It also restores the previous context on |
| // destruction and asserts that this succeeds. Users can optionally use |
| // Restore() to check if restoring the previous context succeeds. This prevents |
| // the assert during destruction. |
| class GL_EXPORT ScopedMakeCurrent { |
| public: |
| ScopedMakeCurrent(gl::GLContext* context, gl::GLSurface* surface); |
| ~ScopedMakeCurrent(); |
| |
| private: |
| scoped_refptr<gl::GLContext> previous_context_; |
| scoped_refptr<gl::GLSurface> previous_surface_; |
| scoped_refptr<gl::GLContext> context_; |
| scoped_refptr<gl::GLSurface> surface_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ScopedMakeCurrent); |
| }; |
| |
| // This behaves similarly to ScopedMakeCurrent, except that it releases the |
| // current context on creation and restores it on destruction. |
| class GL_EXPORT ScopedReleaseCurrent { |
| public: |
| ScopedReleaseCurrent(); |
| ~ScopedReleaseCurrent(); |
| |
| private: |
| scoped_refptr<gl::GLContext> previous_context_; |
| scoped_refptr<gl::GLSurface> previous_surface_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ScopedReleaseCurrent); |
| }; |
| |
| } // namespace ui |
| |
| #endif // UI_GL_SCOPED_MAKE_CURRENT_H_ |