/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef Extensions3D_h
#define Extensions3D_h

#include <wtf/text/WTFString.h>

namespace WebCore {

// This is a base class containing only pure virtual functions.
// Implementations must provide a subclass.
//
// The supported extensions are defined below and in subclasses,
// possibly platform-specific ones.
//
// Calling any extension function not supported by the current context
// must be a no-op; in particular, it may not have side effects. In
// this situation, if the function has a return value, 0 is returned.
class Extensions3D {
public:
    virtual ~Extensions3D() {}

    // Supported extensions:
    //   GL_EXT_texture_format_BGRA8888
    //   GL_EXT_read_format_bgra
    //   GL_ARB_robustness
    //   GL_EXT_packed_depth_stencil / GL_OES_packed_depth_stencil

    // Takes full name of extension; for example,
    // "GL_EXT_texture_format_BGRA8888".
    virtual bool supports(const String&) = 0;

    enum {
        // GL_EXT_texture_format_BGRA8888 enums
        BGRA_EXT = 0x80E1,

        // GL_ARB_robustness enums
        GUILTY_CONTEXT_RESET_ARB = 0x8253,
        INNOCENT_CONTEXT_RESET_ARB = 0x8254,
        UNKNOWN_CONTEXT_RESET_ARB = 0x8255,

        // GL_EXT/OES_packed_depth_stencil enums
        DEPTH24_STENCIL8 = 0x88F0
    };

    // GL_ARB_robustness
    virtual int getGraphicsResetStatusARB() = 0;
};

} // namespace WebCore

#endif // Extensions3D_h