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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/logging.h" | 5 #include "base/logging.h" |
6 #include "ui/gl/scoped_cgl.h" | 6 #include "ui/gl/scoped_cgl.h" |
7 | 7 |
8 namespace gfx { | 8 namespace gl { |
9 | 9 |
10 ScopedCGLSetCurrentContext::ScopedCGLSetCurrentContext(CGLContextObj context) { | 10 ScopedCGLSetCurrentContext::ScopedCGLSetCurrentContext(CGLContextObj context) { |
11 CGLContextObj previous_context = CGLGetCurrentContext(); | 11 CGLContextObj previous_context = CGLGetCurrentContext(); |
12 // It is possible for the previous context to have a zero reference count, | 12 // It is possible for the previous context to have a zero reference count, |
13 // because making a context current does not increment the reference count. | 13 // because making a context current does not increment the reference count. |
14 // In that case, do not restore the previous context. | 14 // In that case, do not restore the previous context. |
15 if (previous_context && CGLGetContextRetainCount(previous_context)) { | 15 if (previous_context && CGLGetContextRetainCount(previous_context)) { |
16 previous_context_.reset(previous_context, base::scoped_policy::RETAIN); | 16 previous_context_.reset(previous_context, base::scoped_policy::RETAIN); |
17 } | 17 } |
18 CGLError error = CGLSetCurrentContext(context); | 18 CGLError error = CGLSetCurrentContext(context); |
19 DCHECK_EQ(error, kCGLNoError) << "CGLSetCurrentContext should never fail"; | 19 DCHECK_EQ(error, kCGLNoError) << "CGLSetCurrentContext should never fail"; |
20 } | 20 } |
21 | 21 |
22 ScopedCGLSetCurrentContext::~ScopedCGLSetCurrentContext() { | 22 ScopedCGLSetCurrentContext::~ScopedCGLSetCurrentContext() { |
23 CGLError error = CGLSetCurrentContext(previous_context_); | 23 CGLError error = CGLSetCurrentContext(previous_context_); |
24 DCHECK_EQ(error, kCGLNoError) << "CGLSetCurrentContext should never fail"; | 24 DCHECK_EQ(error, kCGLNoError) << "CGLSetCurrentContext should never fail"; |
25 } | 25 } |
26 | 26 |
27 } // namespace gfx | 27 } // namespace gl |
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