| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrGLExtensions_DEFINED |
| #define GrGLExtensions_DEFINED |
| |
| #include "GrGLInterface.h" |
| #include "SkString.h" |
| #include "SkTArray.h" |
| |
| /** |
| * This helper queries the current GL context for its extensions, remembers them, and can be |
| * queried. It supports both glGetString- and glGetStringi-style extension string APIs and will |
| * use the latter if it is available. |
| */ |
| class GrGLExtensions { |
| public: |
| bool init(GrGLBinding binding, const GrGLInterface* iface) { |
| SkASSERT(binding & iface->fBindingsExported); |
| return this->init(binding, iface->fGetString, iface->fGetStringi, iface->fGetIntegerv); |
| } |
| /** |
| * We sometimes need to use this class without having yet created a GrGLInterface. This version |
| * of init expects that getString is always non-NULL while getIntegerv and getStringi are non- |
| * NULL if on desktop GL with version 3.0 or higher. Otherwise it will fail. |
| */ |
| bool init(GrGLBinding binding, |
| GrGLGetStringProc getString, |
| GrGLGetStringiProc getStringi, |
| GrGLGetIntegervProc getIntegerv); |
| |
| /** |
| * Queries whether an extension is present. This will fail if init() has not been called. |
| */ |
| bool has(const char*) const; |
| |
| void reset() { fStrings.reset(); } |
| |
| void print(const char* sep = "\n") const; |
| |
| private: |
| SkTArray<SkString> fStrings; |
| }; |
| |
| #endif |