1 files changed, 78 insertions, 0 deletions
diff --git a/src/deps/skia/include/gpu/gl/GrGLExtensions.h b/src/deps/skia/include/gpu/gl/GrGLExtensions.h
new file mode 100644
index 000000000..1e2823f71
--- /dev/null
+++ b/src/deps/skia/include/gpu/gl/GrGLExtensions.h
@@ -0,0 +1,78 @@
+/*
+ * 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