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-rw-r--r--gfx/gl/GLLibraryLoader.h52
1 files changed, 52 insertions, 0 deletions
diff --git a/gfx/gl/GLLibraryLoader.h b/gfx/gl/GLLibraryLoader.h
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+++ b/gfx/gl/GLLibraryLoader.h
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef GLLIBRARYLOADER_H_
+#define GLLIBRARYLOADER_H_
+
+#include <array>
+#include <stdio.h>
+
+#include "GLDefs.h"
+#include "nscore.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/SharedLibrary.h"
+
+namespace mozilla {
+namespace gl {
+
+struct SymLoadStruct final {
+ PRFuncPtr* symPointer;
+ std::array<const char*, 6> symNames;
+};
+
+void ClearSymbols(const SymLoadStruct* firstStruct);
+
+class SymbolLoader final {
+ public:
+ typedef PRFuncPtr(GLAPIENTRY* GetProcAddressT)(const char*);
+
+ GetProcAddressT mPfn = nullptr; // Try this first, if not null.
+ PRLibrary* mLib = nullptr;
+
+ explicit SymbolLoader(void*(GLAPIENTRY* pfn)(const char*))
+ : mPfn(GetProcAddressT(pfn)) {
+ MOZ_ASSERT(mPfn);
+ }
+
+ explicit SymbolLoader(const GetProcAddressT pfn) : mPfn(pfn) {
+ MOZ_ASSERT(mPfn);
+ }
+
+ explicit SymbolLoader(PRLibrary& lib) : mLib(&lib) { MOZ_ASSERT(mLib); }
+
+ PRFuncPtr GetProcAddress(const char*) const;
+ bool LoadSymbols(const SymLoadStruct* firstStruct,
+ bool warnOnFailures = true) const;
+};
+
+} // namespace gl
+} // namespace mozilla
+
+#endif // GLLIBRARYLOADER_H_