Source/WebCore/platform/graphics/cocoa/GraphicsContextGLCocoa.h

/*
 * Copyright (C) 2021 Apple 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 INC. ``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 INC. OR
 * 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
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#if ENABLE(WEBGL)

#include "GraphicsContextGLOpenGL.h"
#include "IOSurface.h"

namespace WebCore {

class WEBCORE_EXPORT GraphicsContextGLCocoa : public GraphicsContextGLOpenGL {
public:
    static RefPtr<GraphicsContextGLCocoa> create(WebCore::GraphicsContextGLAttributes&&);
    ~GraphicsContextGLCocoa();
    IOSurface* displayBuffer();
    void markDisplayBufferInUse();

    enum class PbufferAttachmentUsage { Read, Write, ReadWrite };
    // Returns a handle which, if non-null, must be released via the
    // detach call below.
    void* createPbufferAndAttachIOSurface(GCGLenum target, PbufferAttachmentUsage, GCGLenum internalFormat, GCGLsizei width, GCGLsizei height, GCGLenum type, IOSurfaceRef, GCGLuint plane);
    void destroyPbufferAndDetachIOSurface(void* handle);
#if !PLATFORM(IOS_FAMILY_SIMULATOR)
    void* attachIOSurfaceToSharedTexture(GCGLenum target, IOSurface*);
    void detachIOSurfaceFromSharedTexture(void* handle);
#endif

protected:
    GraphicsContextGLCocoa(WebCore::GraphicsContextGLAttributes&&);
    bool isValid() const;
};

}

#endif