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 string APIs and will 18 * use the latter if it is available. 19 */ 20 class GrGLExtensions { 21 public: init(GrGLBinding binding,const GrGLInterface * iface)22 bool init(GrGLBinding binding, const GrGLInterface* iface) { 23 SkASSERT(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 GrGLInterface. This version 28 * of init expects that getString is always non-NULL while getIntegerv and getStringi 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 reset()41 void reset() { fStrings.reset(); } 42 43 void print(const char* sep = "\n") const; 44 45 private: 46 SkTArray<SkString> fStrings; 47 }; 48 49 #endif 50