| /* |
| * 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 "GrGLFunctions.h" |
| #include "SkString.h" |
| #include "SkTArray.h" |
| |
| struct GrGLInterface; |
| |
| /** |
| * 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 SK_API GrGLExtensions { |
| public: |
| GrGLExtensions() : fInitialized(false), fStrings(SkNEW(SkTArray<SkString>)) {} |
| |
| GrGLExtensions(const GrGLExtensions&); |
| |
| GrGLExtensions& operator=(const GrGLExtensions&); |
| |
| void swap(GrGLExtensions* that) { |
| fStrings.swap(&that->fStrings); |
| SkTSwap(fInitialized, that->fInitialized); |
| } |
| |
| /** |
| * 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(GrGLStandard standard, |
| GrGLGetStringProc getString, |
| GrGLGetStringiProc getStringi, |
| GrGLGetIntegervProc getIntegerv); |
| |
| bool isInitialized() const { return fInitialized; } |
| |
| /** |
| * Queries whether an extension is present. This will fail if init() has not been called. |
| */ |
| bool has(const char[]) const; |
| |
| /** |
| * Removes an extension if present. Returns true if the extension was present before the call. |
| */ |
| bool remove(const char[]); |
| |
| /** |
| * Adds an extension to list |
| */ |
| void add(const char[]); |
| |
| void reset() { fStrings->reset(); } |
| |
| void print(const char* sep = "\n") const; |
| |
| private: |
| bool fInitialized; |
| SkAutoTDelete<SkTArray<SkString> > fStrings; |
| }; |
| |
| #endif |