gfx/gl/GLLibraryLoader.h
author Ed Morley <emorley@mozilla.com>
Mon, 14 May 2012 21:05:24 +0100
changeset 93909 3f7291bc4efc003964fb98b1390019771042f3ac
parent 89612 aad5bc8b343350b24d3f64b090add5b4453bcab4
child 100844 b5c4b792f3f2a047e3517472d72842a76afb77cd
permissions -rw-r--r--
Backout 345ae68f15f4, b3b40121ac8d, 0d18b7a246d7, 9dbb6064ab58, dee9d7fa8eb6, 63eec6bfa948, 323c6be7cfe8 & f4aac7523a48 (bug 732875) for compilation failures

/* 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>

#ifdef WIN32
#include <windows.h>
#endif

#include "GLDefs.h"
#include "mozilla/Util.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 = 5,
        MAX_SYMBOL_LENGTH = 128
    };

    typedef struct {
        PRFuncPtr *symPointer;
        const char *symNames[MAX_SYMBOL_NAMES];
    } SymLoadStruct;

    bool LoadSymbols(SymLoadStruct *firstStruct,
                       bool tryplatform = false,
                       const char *prefix = nsnull);

    /*
     * Static version of the functions in this class
     */
    static PRFuncPtr LookupSymbol(PRLibrary *lib,
                                  const char *symname,
                                  PlatformLookupFunction lookupFunction = nsnull);
    static bool LoadSymbols(PRLibrary *lib,
                              SymLoadStruct *firstStruct,
                              PlatformLookupFunction lookupFunction = nsnull,
                              const char *prefix = nsnull);
protected:
    GLLibraryLoader() {
        mLibrary = nsnull;
        mLookupFunc = nsnull;
    }

    PRLibrary *mLibrary;
    PlatformLookupFunction mLookupFunc;
};

} /* namespace gl */
} /* namespace mozilla */

#endif /* GLLIBRARYLOADER_H_ */