Add m-esr52 at 52.6.0

1 files changed, 63 insertions, 0 deletions

diff --git a/gfx/gl/GLLibraryLoader.h b/gfx/gl/GLLibraryLoader.h
new file mode 100644
index 000000000..70ba43c4d
--- /dev/null
+++ b/gfx/gl/GLLibraryLoader.h
@@ -0,0 +1,63 @@
+/* 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 <stdio.h>
+
+#include "GLDefs.h"
+#include "nscore.h"
+#include "prlink.h"
+
+namespace mozilla {
+namespace gl {
+
+class GLLibraryLoader
+{
+public:
+    bool OpenLibrary(const char* library);
+
+    typedef PRFuncPtr (GLAPIENTRY * PlatformLookupFunction) (const char*);
+
+    enum {
+        MAX_SYMBOL_NAMES = 6,
+        MAX_SYMBOL_LENGTH = 128
+    };
+
+    typedef struct {
+        PRFuncPtr* symPointer;
+        const char* symNames[MAX_SYMBOL_NAMES];
+    } SymLoadStruct;
+
+    bool LoadSymbols(const SymLoadStruct* firstStruct,
+                     bool tryplatform = false,
+                     const char* prefix = nullptr,
+                     bool warnOnFailure = true);
+
+    /*
+     * Static version of the functions in this class
+     */
+    static PRFuncPtr LookupSymbol(PRLibrary* lib,
+                                  const char* symname,
+                                  PlatformLookupFunction lookupFunction = nullptr);
+    static bool LoadSymbols(PRLibrary* lib,
+                            const SymLoadStruct* firstStruct,
+                            PlatformLookupFunction lookupFunction = nullptr,
+                            const char* prefix = nullptr,
+                            bool warnOnFailure = true);
+protected:
+    GLLibraryLoader() {
+        mLibrary = nullptr;
+        mLookupFunc = nullptr;
+    }
+
+    PRLibrary* mLibrary;
+    PlatformLookupFunction mLookupFunc;
+};
+
+} /* namespace gl */
+} /* namespace mozilla */
+
+#endif /* GLLIBRARYLOADER_H_ */