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Diffstat (limited to 'gpu/gl/GrGLExtensions.h')
-rw-r--r-- | gpu/gl/GrGLExtensions.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/gpu/gl/GrGLExtensions.h b/gpu/gl/GrGLExtensions.h new file mode 100644 index 0000000..f4e950a --- /dev/null +++ b/gpu/gl/GrGLExtensions.h @@ -0,0 +1,49 @@ +/* + * 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) { + GrAssert(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 |