1 // Copyright (C) 2015 The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #ifndef GLCOMMON_GL_LIBRARY_H
16 #define GLCOMMON_GL_LIBRARY_H
17 
18 // An interface class used to model the desktop GL library to use at runtime.
19 // Use GlLibrary::getHostInstance() to retrieve the instance corresponding
20 // to the host's default system GL library.
21 class GlLibrary {
22 public:
23     // Generic pointer-to-function type.
24     typedef void (*GlFunctionPointer)(void);
25 
26     // Empty constructor.
GlLibrary()27     GlLibrary() {}
28 
29     // Empty destructor.
~GlLibrary()30     virtual ~GlLibrary() {}
31 
32     // Find the function named |name| in the library and return its address.
33     virtual GlFunctionPointer findSymbol(const char* name) = 0;
34 };
35 
36 #endif  // GLCOMMON_GL_LIBRARY_H
37