skia2/include/gpu/gl/GrGLExtensions.h
bungeman a3434d83cf Add skstd::unique_ptr and use it.
TBR=bsalomon@google.com
The one gpu include change is just to fix swap in implementation.

Review URL: https://codereview.chromium.org/1330503006
2015-09-07 12:45:52 -07:00

72 lines
2.0 KiB
C++

/*
* 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(new 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