| /* |
| * 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 "include/core/SkString.h" |
| #include "include/gpu/gl/GrGLFunctions.h" |
| #include "include/private/SkTArray.h" |
| |
| #include <utility> |
| |
| struct GrGLInterface; |
| class SkJSONWriter; |
| |
| /** |
| * 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. It also will query for EGL extensions if a eglQueryString |
| * implementation is provided. |
| */ |
| class SK_API GrGLExtensions { |
| public: |
| GrGLExtensions() {} |
| |
| GrGLExtensions(const GrGLExtensions&); |
| |
| GrGLExtensions& operator=(const GrGLExtensions&); |
| |
| void swap(GrGLExtensions* that) { |
| using std::swap; |
| swap(fStrings, that->fStrings); |
| swap(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, |
| GrGLFunction<GrGLGetStringFn> getString, |
| GrGLFunction<GrGLGetStringiFn> getStringi, |
| GrGLFunction<GrGLGetIntegervFn> getIntegerv, |
| GrGLFunction<GrEGLQueryStringFn> queryString = nullptr, |
| GrEGLDisplay eglDisplay = nullptr); |
| |
| 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 dumpJSON(SkJSONWriter*) const; |
| |
| private: |
| bool fInitialized = false; |
| SkTArray<SkString> fStrings; |
| }; |
| |
| #endif |