12eea2b10d
git-svn-id: http://skia.googlecode.com/svn/trunk@7875 2bbb7eff-a529-9590-31e7-b0007b416f81
48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef GrGLExtensions_DEFINED
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#define GrGLExtensions_DEFINED
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#include "GrGLInterface.h"
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#include "SkString.h"
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#include "SkTArray.h"
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/**
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* This helper queries the current GL context for its extensions, remembers them, and can be
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* queried. It supports both glGetString- and glGetStringi-style extension string APIs and will
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* use the latter if it is available.
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*/
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class GrGLExtensions {
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public:
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bool init(GrGLBinding binding, const GrGLInterface* iface) {
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GrAssert(binding & iface->fBindingsExported);
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return this->init(binding, iface->fGetString, iface->fGetStringi, iface->fGetIntegerv);
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}
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/**
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* We sometimes need to use this class without having yet created a GrGLInterface. This version
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* of init expects that getString is always non-NULL while getIntegerv and getStringi are non-
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* NULL if on desktop GL with version 3.0 or higher. Otherwise it will fail.
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*/
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bool init(GrGLBinding binding,
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GrGLGetStringProc getString,
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GrGLGetStringiProc getStringi,
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GrGLGetIntegervProc getIntegerv);
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/**
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* Queries whether an extension is present. This will fail if init() has not been called.
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*/
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bool has(const char*) const;
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void reset() { fStrings.reset(); }
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private:
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SkTArray<SkString> fStrings;
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};
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#endif
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