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79 lines
2.2 KiB
79 lines
2.2 KiB
4 months ago
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/*
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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 "../../private/SkTArray.h"
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#include "GrGLFunctions.h"
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#include "SkString.h"
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#include <utility>
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struct GrGLInterface;
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class SkJSONWriter;
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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. It also will query for EGL extensions if a eglQueryString
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* implementation is provided.
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*/
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class SK_API GrGLExtensions {
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public:
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GrGLExtensions() {}
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GrGLExtensions(const GrGLExtensions&);
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GrGLExtensions& operator=(const GrGLExtensions&);
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void swap(GrGLExtensions* that) {
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using std::swap;
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swap(fStrings, that->fStrings);
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swap(fInitialized, that->fInitialized);
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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(GrGLStandard standard,
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GrGLFunction<GrGLGetStringFn> getString,
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GrGLFunction<GrGLGetStringiFn> getStringi,
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GrGLFunction<GrGLGetIntegervFn> getIntegerv,
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GrGLFunction<GrEGLQueryStringFn> queryString = nullptr,
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GrEGLDisplay eglDisplay = nullptr);
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bool isInitialized() const { return fInitialized; }
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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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/**
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* Removes an extension if present. Returns true if the extension was present before the call.
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*/
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bool remove(const char[]);
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/**
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* Adds an extension to list
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*/
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void add(const char[]);
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void reset() { fStrings.reset(); }
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void dumpJSON(SkJSONWriter*) const;
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private:
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bool fInitialized = false;
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SkTArray<SkString> fStrings;
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};
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#endif
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