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Side by Side Diff: include/gpu/gl/GrGLExtensions.h

Issue 12328111: Use glGetStringi to get extensions when available. (Closed) Base URL: http://skia.googlecode.com/svn/trunk/
Patch Set: Created 7 years, 10 months ago
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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 */
7
8 #ifndef GrGLExtensions_DEFINED
9 #define GrGLExtensions_DEFINED
10
11 #include "GrGLInterface.h"
12 #include "SkString.h"
13 #include "SkTArray.h"
14
15 /**
16 * This helper queries the current GL context for its extensions, remembers them , and can be
17 * queried. It supports both glGetString- and glGetStringi-style extension strin g APIs and will
18 * use the latter if it is available.
19 */
20 class GrGLExtensions {
21 public:
22 bool init(GrGLBinding binding, const GrGLInterface* iface) {
23 GrAssert(binding & iface->fBindingsExported);
24 return this->init(binding, iface->fGetString, iface->fGetStringi, iface- >fGetIntegerv);
25 }
26 /**
27 * We sometimes need to use this class without having yet created a GrGLInte rface. This version
28 * of init expects that getString is always non-NULL while getIntegerv and g etStringi are non-
29 * NULL if on desktop GL with version 3.0 or higher. Otherwise it will fail.
30 */
31 bool init(GrGLBinding binding,
32 GrGLGetStringProc getString,
33 GrGLGetStringiProc getStringi,
34 GrGLGetIntegervProc getIntegerv);
35
36 /**
37 * Queries whether an extension is present. This will fail if init() has not been called.
38 */
39 bool has(const char*) const;
40
41 void reset() { fStrings.reset(); }
42
43 private:
44 SkTArray<SkString> fStrings;
45 };
46
47 #endif
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