ui/gl/gl_fence.h

   1 // Copyright (c) 2012 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_GL_FENCE_H_
   6 #define UI_GL_GL_FENCE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "ui/gl/gl_export.h"
  10
  11 namespace gfx {
  12
  13 class GL_EXPORT GLFence {
  14  public:
  15   GLFence();
  16   virtual ~GLFence();
  17
  18   static GLFence* Create();
  19
  20   // Creates a fence that is not guaranteed to signal until the current context
  21   // is flushed. It is illegal to call Client/ServerWait() on a fence without
  22   // having explicitly called glFlush() or glFinish() in the originating
  23   // context.
  24   static GLFence* CreateWithoutFlush();
  25
  26   virtual bool HasCompleted() = 0;
  27   virtual void ClientWait() = 0;
  28
  29   // Will block the server if supported, but might fall back to blocking the
  30   // client.
  31   virtual void ServerWait() = 0;
  32
  33  protected:
  34   static bool IsContextLost();
  35
  36  private:
  37   DISALLOW_COPY_AND_ASSIGN(GLFence);
  38 };
  39
  40 }  // namespace gfx
  41
  42 #endif  // UI_GL_GL_FENCE_H_