ui/gl/scoped_cgl.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_GL_SCOPED_CGL_H_
   6 #define UI_GL_SCOPED_CGL_H_
   7
   8 #include <OpenGL/OpenGL.h>
   9
  10 #include "base/mac/scoped_typeref.h"
  11 #include "ui/gl/gl_export.h"
  12
  13 namespace base {
  14
  15 template<>
  16 struct ScopedTypeRefTraits<CGLContextObj> {
  17   static void Retain(CGLContextObj object) {
  18     CGLRetainContext(object);
  19   }
  20   static void Release(CGLContextObj object) {
  21     CGLReleaseContext(object);
  22   }
  23 };
  24
  25 template<>
  26 struct ScopedTypeRefTraits<CGLPixelFormatObj> {
  27   static void Retain(CGLPixelFormatObj object) {
  28     CGLRetainPixelFormat(object);
  29   }
  30   static void Release(CGLPixelFormatObj object) {
  31     CGLReleasePixelFormat(object);
  32   }
  33 };
  34
  35 }  // namespace base
  36
  37 namespace gfx {
  38
  39 class GL_EXPORT ScopedCGLSetCurrentContext {
  40  public:
  41   explicit ScopedCGLSetCurrentContext(CGLContextObj context);
  42   ~ScopedCGLSetCurrentContext();
  43  private:
  44   // Note that if a context is destroyed when it is current, then the current
  45   // context is changed to NULL. Take out a reference on |previous_context_| to
  46   // preserve this behavior (when this falls out of scope, |previous_context_|
  47   // will be made current, then released, so NULL will be current if that
  48   // release destroys the context).
  49   base::ScopedTypeRef<CGLContextObj> previous_context_;
  50
  51   DISALLOW_COPY_AND_ASSIGN(ScopedCGLSetCurrentContext);
  52 };
  53
  54 }  // namespace gfx
  55
  56 #endif  // UI_GL_SCOPED_CGL_H_