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      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 #include "ui/gl/scoped_make_current.h"
      6 
      7 #include "base/logging.h"
      8 #include "ui/gl/gl_context.h"
      9 #include "ui/gl/gl_surface.h"
     10 
     11 namespace ui {
     12 
     13 ScopedMakeCurrent::ScopedMakeCurrent(gfx::GLContext* context,
     14                                      gfx::GLSurface* surface)
     15     : previous_context_(gfx::GLContext::GetCurrent()),
     16       previous_surface_(gfx::GLSurface::GetCurrent()),
     17       context_(context),
     18       surface_(surface),
     19       succeeded_(false) {
     20   DCHECK(context);
     21   DCHECK(surface);
     22   succeeded_ = context->MakeCurrent(surface);
     23 }
     24 
     25 ScopedMakeCurrent::~ScopedMakeCurrent() {
     26   if (previous_context_.get()) {
     27     DCHECK(previous_surface_.get());
     28     previous_context_->MakeCurrent(previous_surface_.get());
     29   } else {
     30     context_->ReleaseCurrent(surface_.get());
     31   }
     32 }
     33 
     34 bool ScopedMakeCurrent::Succeeded() const {
     35   return succeeded_;
     36 }
     37 
     38 }  // namespace ui
     39