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/*
* Copyright (C) 2009-2017 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 "GraphicsTypesGL.h"
#include <wtf/Forward.h>
#include <wtf/Noncopyable.h>
#include <wtf/RefCounted.h>
#include <wtf/WeakPtr.h>
namespace WebCore {
class GraphicsContextGL;
class WebCoreOpaqueRoot;
class WebGLRenderingContextBase;
template<typename T, unsigned target = 0>
class WebGLBindingPoint {
WTF_MAKE_NONCOPYABLE(WebGLBindingPoint);
public:
WebGLBindingPoint() = default;
explicit WebGLBindingPoint(RefPtr<T> object)
: m_object(WTFMove(object))
{
if (m_object)
didBind(*m_object);
}
WebGLBindingPoint(WebGLBindingPoint&&) = default;
~WebGLBindingPoint() = default;
WebGLBindingPoint& operator=(WebGLBindingPoint&&) = default;
WebGLBindingPoint& operator=(RefPtr<T> object)
{
if (m_object == object)
return *this;
m_object = WTFMove(object);
if (m_object)
didBind(*m_object);
return *this;
}
bool operator==(const T* a) const { return a == m_object; }
bool operator==(const RefPtr<T>& a) const { return a == m_object; }
explicit operator bool() const { return m_object; }
T* get() const { return m_object.get(); }
T* operator->() const { return m_object.get(); }
T& operator*() const { return *m_object; }
operator RefPtr<T>() const { return m_object; }
private:
void didBind(T& object)
{
if constexpr(!target)
object.didBind();
else
object.didBind(target);
}
RefPtr<T> m_object;
};
class WebGLObject : public RefCounted<WebGLObject> {
public:
virtual ~WebGLObject();
WebGLRenderingContextBase* context() const;
GraphicsContextGL* graphicsContextGL() const;
PlatformGLObject object() const { return m_object; }
// deleteObject may not always delete the OpenGL resource. For programs and
// shaders, deletion is delayed until they are no longer attached.
// The AbstractLocker argument enforces at compile time that the objectGraphLock
// is held. This isn't necessary for all object types, but enough of them that
// it's done for all of them.
void deleteObject(const AbstractLocker&, GraphicsContextGL*);
void onAttached() { ++m_attachmentCount; }
void onDetached(const AbstractLocker&, GraphicsContextGL*);
// This indicates whether the client side issue a delete call already, not
// whether the OpenGL resource is deleted.
// object()==0 indicates the OpenGL resource is deleted.
bool isDeleted() const { return m_deleted; }
// True if this object belongs to the context.
bool validate(const WebGLRenderingContextBase&) const;
Lock& objectGraphLockForContext();
protected:
WebGLObject(WebGLRenderingContextBase&, PlatformGLObject);
void runDestructor();
// deleteObjectImpl should be only called once to delete the OpenGL resource.
virtual void deleteObjectImpl(const AbstractLocker&, GraphicsContextGL*, PlatformGLObject) = 0;
WeakPtr<WebGLRenderingContextBase> m_context;
private:
PlatformGLObject m_object { 0 };
unsigned m_attachmentCount { 0 };
bool m_deleted { false };
};
template<typename T>
PlatformGLObject objectOrZero(const T& object)
{
return object ? object->object() : 0;
}
WebCoreOpaqueRoot root(WebGLObject*);
} // namespace WebCore
#endif
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