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/*
* 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
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