1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/gpu/gl/GrGLExtensions.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,71 @@
1.4 +/*
1.5 + * Copyright 2013 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef GrGLExtensions_DEFINED
1.12 +#define GrGLExtensions_DEFINED
1.13 +
1.14 +#include "GrGLFunctions.h"
1.15 +#include "SkString.h"
1.16 +#include "SkTArray.h"
1.17 +
1.18 +struct GrGLInterface;
1.19 +
1.20 +/**
1.21 + * This helper queries the current GL context for its extensions, remembers them, and can be
1.22 + * queried. It supports both glGetString- and glGetStringi-style extension string APIs and will
1.23 + * use the latter if it is available.
1.24 + */
1.25 +class SK_API GrGLExtensions {
1.26 +public:
1.27 + GrGLExtensions() : fInitialized(false), fStrings(SkNEW(SkTArray<SkString>)) {}
1.28 +
1.29 + GrGLExtensions(const GrGLExtensions&);
1.30 +
1.31 + GrGLExtensions& operator=(const GrGLExtensions&);
1.32 +
1.33 + void swap(GrGLExtensions* that) {
1.34 + fStrings.swap(&that->fStrings);
1.35 + SkTSwap(fInitialized, that->fInitialized);
1.36 + }
1.37 +
1.38 + /**
1.39 + * We sometimes need to use this class without having yet created a GrGLInterface. This version
1.40 + * of init expects that getString is always non-NULL while getIntegerv and getStringi are non-
1.41 + * NULL if on desktop GL with version 3.0 or higher. Otherwise it will fail.
1.42 + */
1.43 + bool init(GrGLStandard standard,
1.44 + GrGLGetStringProc getString,
1.45 + GrGLGetStringiProc getStringi,
1.46 + GrGLGetIntegervProc getIntegerv);
1.47 +
1.48 + bool isInitialized() const { return fInitialized; }
1.49 +
1.50 + /**
1.51 + * Queries whether an extension is present. This will fail if init() has not been called.
1.52 + */
1.53 + bool has(const char[]) const;
1.54 +
1.55 + /**
1.56 + * Removes an extension if present. Returns true if the extension was present before the call.
1.57 + */
1.58 + bool remove(const char[]);
1.59 +
1.60 + /**
1.61 + * Adds an extension to list
1.62 + */
1.63 + void add(const char[]);
1.64 +
1.65 + void reset() { fStrings->reset(); }
1.66 +
1.67 + void print(const char* sep = "\n") const;
1.68 +
1.69 +private:
1.70 + bool fInitialized;
1.71 + SkAutoTDelete<SkTArray<SkString> > fStrings;
1.72 +};
1.73 +
1.74 +#endif
