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/*
* Copyright (C) 2015-2017 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
#include "WebGLBuffer.h"
#include "WebGLContextObject.h"
namespace WebCore {
class WebGLVertexArrayObjectBase : public WebGLContextObject {
public:
enum class Type { Default, User };
// Cached values for vertex attrib range checks
struct VertexAttribState {
bool isBound() const { return bufferBinding && bufferBinding->object(); }
bool validateBinding() const { return !enabled || isBound(); }
bool enabled { false };
RefPtr<WebGLBuffer> bufferBinding;
GC3Dsizei bytesPerElement { 0 };
GC3Dint size { 4 };
GC3Denum type { GraphicsContext3D::FLOAT };
bool normalized { false };
GC3Dsizei stride { 16 };
GC3Dsizei originalStride { 0 };
GC3Dintptr offset { 0 };
GC3Duint divisor { 0 };
};
bool isDefaultObject() const { return m_type == Type::Default; }
bool hasEverBeenBound() const { return object() && m_hasEverBeenBound; }
void setHasEverBeenBound() { m_hasEverBeenBound = true; }
WebGLBuffer* getElementArrayBuffer() const { return m_boundElementArrayBuffer.get(); }
void setElementArrayBuffer(WebGLBuffer*);
VertexAttribState& getVertexAttribState(int index) { return m_vertexAttribState[index]; }
void setVertexAttribState(GC3Duint, GC3Dsizei, GC3Dint, GC3Denum, GC3Dboolean, GC3Dsizei, GC3Dintptr, WebGLBuffer&);
void unbindBuffer(WebGLBuffer&);
void setVertexAttribDivisor(GC3Duint index, GC3Duint divisor);
protected:
WebGLVertexArrayObjectBase(WebGLRenderingContextBase&, Type);
void deleteObjectImpl(GraphicsContext3D*, Platform3DObject) override = 0;
Type m_type;
bool m_hasEverBeenBound { false };
RefPtr<WebGLBuffer> m_boundElementArrayBuffer;
Vector<VertexAttribState> m_vertexAttribState;
};
} // namespace WebCore
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