1 /*
2  * Copyright (C) 2010 Google Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  *
8  * 1.  Redistributions of source code must retain the above copyright
9  *     notice, this list of conditions and the following disclaimer.
10  * 2.  Redistributions in binary form must reproduce the above copyright
11  *     notice, this list of conditions and the following disclaimer in the
12  *     documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24  */
25 
26 #ifndef WebGLExtension_h
27 #define WebGLExtension_h
28 
29 #include "WebGLRenderingContext.h"
30 
31 namespace WebCore {
32 
33 class WebGLExtension {
34 public:
35     // Extension names are needed to properly wrap instances in JavaScript objects.
36     enum ExtensionName {
37         WebKitLoseContextName,
38         OESTextureFloatName,
39         OESStandardDerivativesName,
40         OESVertexArrayObjectName,
41     };
42 
ref()43     void ref() { m_context->ref(); }
deref()44     void deref() { m_context->deref(); }
context()45     WebGLRenderingContext* context() { return m_context; }
46 
47     virtual ~WebGLExtension();
48     virtual ExtensionName getName() const = 0;
49 
50 protected:
51     WebGLExtension(WebGLRenderingContext*);
52     WebGLRenderingContext* m_context;
53 };
54 
55 } // namespace WebCore
56 
57 #endif // WebGLExtension_h
58