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| 1 /* |
| 2 * Copyright 2013 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #ifndef GrGLExtensions_DEFINED |
| 9 #define GrGLExtensions_DEFINED |
| 10 |
| 11 #include "GrGLInterface.h" |
| 12 #include "SkString.h" |
| 13 #include "SkTArray.h" |
| 14 |
| 15 /** |
| 16 * This helper queries the current GL context for its extensions, remembers them
, and can be |
| 17 * queried. It supports both glGetString- and glGetStringi-style extension strin
g APIs and will |
| 18 * use the latter if it is available. |
| 19 */ |
| 20 class GrGLExtensions { |
| 21 public: |
| 22 bool init(GrGLBinding binding, const GrGLInterface* iface) { |
| 23 GrAssert(binding & iface->fBindingsExported); |
| 24 return this->init(binding, iface->fGetString, iface->fGetStringi, iface-
>fGetIntegerv); |
| 25 } |
| 26 /** |
| 27 * We sometimes need to use this class without having yet created a GrGLInte
rface. This version |
| 28 * of init expects that getString is always non-NULL while getIntegerv and g
etStringi are non- |
| 29 * NULL if on desktop GL with version 3.0 or higher. Otherwise it will fail. |
| 30 */ |
| 31 bool init(GrGLBinding binding, |
| 32 GrGLGetStringProc getString, |
| 33 GrGLGetStringiProc getStringi, |
| 34 GrGLGetIntegervProc getIntegerv); |
| 35 |
| 36 /** |
| 37 * Queries whether an extension is present. This will fail if init() has not
been called. |
| 38 */ |
| 39 bool has(const char*) const; |
| 40 |
| 41 void reset() { fStrings.reset(); } |
| 42 |
| 43 private: |
| 44 SkTArray<SkString> fStrings; |
| 45 }; |
| 46 |
| 47 #endif |
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