The Tor Browser: gfx/skia/trunk/include/gpu/gl/GrGLExtensions.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /*

     2  * Copyright 2013 Google Inc.

     3  *

     4  * Use of this source code is governed by a BSD-style license that can be

     5  * found in the LICENSE file.

     6  */

     8 #ifndef GrGLExtensions_DEFINED

     9 #define GrGLExtensions_DEFINED

    11 #include "GrGLFunctions.h"

    12 #include "SkString.h"

    13 #include "SkTArray.h"

    15 struct GrGLInterface;

    17 /**

    18  * This helper queries the current GL context for its extensions, remembers them, and can be

    19  * queried. It supports both glGetString- and glGetStringi-style extension string APIs and will

    20  * use the latter if it is available.

    21  */

    22 class SK_API GrGLExtensions {

    23 public:

    24     GrGLExtensions() : fInitialized(false), fStrings(SkNEW(SkTArray<SkString>)) {}

    26     GrGLExtensions(const GrGLExtensions&);

    28     GrGLExtensions& operator=(const GrGLExtensions&);

    30     void swap(GrGLExtensions* that) {

    31         fStrings.swap(&that->fStrings);

    32         SkTSwap(fInitialized, that->fInitialized);

    33     }

    35     /**

    36      * We sometimes need to use this class without having yet created a GrGLInterface. This version

    37      * of init expects that getString is always non-NULL while getIntegerv and getStringi are non-

    38      * NULL if on desktop GL with version 3.0 or higher. Otherwise it will fail.

    39      */

    40     bool init(GrGLStandard standard,

    41               GrGLGetStringProc getString,

    42               GrGLGetStringiProc getStringi,

    43               GrGLGetIntegervProc getIntegerv);

    45     bool isInitialized() const { return fInitialized; }

    47     /**

    48      * Queries whether an extension is present. This will fail if init() has not been called.

    49      */

    50     bool has(const char[]) const;

    52     /**

    53      * Removes an extension if present. Returns true if the extension was present before the call.

    54      */

    55     bool remove(const char[]);

    57     /**

    58      * Adds an extension to list

    59      */

    60     void add(const char[]);

    62     void reset() { fStrings->reset(); }

    64     void print(const char* sep = "\n") const;

    66 private:

    67     bool                                fInitialized;

    68     SkAutoTDelete<SkTArray<SkString> >  fStrings;

    69 };

    71 #endif

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