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/*
* Copyright (C) 2009-2021 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
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(WEBGL)
#include "WebGLContextObject.h"
#include "WebGLSharedObject.h"
#include <wtf/HashMap.h>
#include <wtf/RefCounted.h>
#include <wtf/Vector.h>
namespace JSC {
class AbstractSlotVisitor;
}
namespace WTF {
class AbstractLocker;
}
namespace WebCore {
class WebGLRenderbuffer;
class WebGLTexture;
class WebGLFramebuffer final : public WebGLContextObject {
public:
class WebGLAttachment : public RefCounted<WebGLAttachment> {
public:
virtual ~WebGLAttachment();
virtual WebGLSharedObject* getObject() const = 0;
virtual bool isSharedObject(WebGLSharedObject*) const = 0;
virtual bool isValid() const = 0;
virtual bool isInitialized() const = 0;
virtual void setInitialized() = 0;
virtual void onDetached(const AbstractLocker&, GraphicsContextGL*) = 0;
virtual void attach(GraphicsContextGL*, GCGLenum target, GCGLenum attachment) = 0;
virtual void unattach(GraphicsContextGL*, GCGLenum target, GCGLenum attachment) = 0;
virtual void addMembersToOpaqueRoots(const AbstractLocker&, JSC::AbstractSlotVisitor&) = 0;
protected:
WebGLAttachment();
};
virtual ~WebGLFramebuffer();
static Ref<WebGLFramebuffer> create(WebGLRenderingContextBase&);
#if ENABLE(WEBXR)
static Ref<WebGLFramebuffer> createOpaque(WebGLRenderingContextBase&);
#endif
void setAttachmentForBoundFramebuffer(GCGLenum target, GCGLenum attachment, GCGLenum texTarget, WebGLTexture*, GCGLint level, GCGLint layer);
void setAttachmentForBoundFramebuffer(GCGLenum target, GCGLenum attachment, WebGLRenderbuffer*);
// If an object is attached to the currently bound framebuffer, remove it.
void removeAttachmentFromBoundFramebuffer(const AbstractLocker&, GCGLenum target, WebGLSharedObject*);
// If a given attachment point for the currently bound framebuffer is not null, remove the attached object.
void removeAttachmentFromBoundFramebuffer(const AbstractLocker&, GCGLenum target, GCGLenum attachment);
WebGLSharedObject* getAttachmentObject(GCGLenum) const;
bool hasEverBeenBound() const { return object() && m_hasEverBeenBound; }
void setHasEverBeenBound() { m_hasEverBeenBound = true; }
bool hasStencilBuffer() const;
// Wrapper for drawBuffersEXT/drawBuffersARB to work around a driver bug.
void drawBuffers(const Vector<GCGLenum>& bufs);
GCGLenum getDrawBuffer(GCGLenum);
void addMembersToOpaqueRoots(const AbstractLocker&, JSC::AbstractSlotVisitor&);
#if ENABLE(WEBXR)
bool isOpaque() const { return m_opaque; }
void setOpaqueActive(bool active) { m_opaqueActive = active; }
#endif
private:
WebGLFramebuffer(WebGLRenderingContextBase&);
void deleteObjectImpl(const AbstractLocker&, GraphicsContextGL*, PlatformGLObject) override;
WebGLAttachment* getAttachment(GCGLenum) const;
// Check if the framebuffer is currently bound to the given target.
bool isBound(GCGLenum target) const;
// attach 'attachment' at 'attachmentPoint'.
void attach(GCGLenum target, GCGLenum attachment, GCGLenum attachmentPoint);
// Check if a new drawBuffers call should be issued. This is called when we add or remove an attachment.
void drawBuffersIfNecessary(bool force);
void setAttachmentInternal(GCGLenum attachment, GCGLenum texTarget, WebGLTexture*, GCGLint level, GCGLint layer);
void setAttachmentInternal(GCGLenum attachment, WebGLRenderbuffer*);
// If a given attachment point for the currently bound framebuffer is not
// null, remove the attached object.
void removeAttachmentInternal(const AbstractLocker&, GCGLenum attachment);
typedef HashMap<GCGLenum, RefPtr<WebGLAttachment>> AttachmentMap;
AttachmentMap m_attachments;
bool m_hasEverBeenBound;
Vector<GCGLenum> m_drawBuffers;
Vector<GCGLenum> m_filteredDrawBuffers;
#if ENABLE(WEBXR)
bool m_opaque { false };
bool m_opaqueActive { false };
#endif
};
} // namespace WebCore
#endif
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