/****************************************************************************
 Copyright (c) 2008-2010 Ricardo Quesada
 Copyright (c) 2010-2012 cocos2d-x.org
 Copyright (c) 2011      Zynga Inc.
 Copyright (c) 2013-2014 Chukong Technologies Inc.
 
 http://www.cocos2d-x.org
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ****************************************************************************/

#ifndef __CC_VERTEX_INDEX_DATA_H__
#define __CC_VERTEX_INDEX_DATA_H__

#include "base/CCRef.h"
#include "renderer/CCVertexIndexBuffer.h"
#include "base/CCMap.h"
#include <map>

NS_CC_BEGIN

class VertexBuffer;

enum VertexSemantic
{
    UNKNOWN = -1,
    POSITION,
    COLOR,
    NORMAL,
    BLEND_WEIGHT,
    BLEND_INDEX,
    TEXTURECOORD0,
    TEXTURECOORD1,
    TEXTURECOORD2,
    TEXTURECOORD3
};

enum class VertexType
{
    UNKNOWN,
    FLOAT1,
    FLOAT2,
    FLOAT3,
    FLOAT4,
    BYTE4
};

struct VertexStreamAttribute
{
    VertexStreamAttribute()
    : _offset(0),_semantic(VertexSemantic::UNKNOWN),_type(VertexType::UNKNOWN)
    {
    }
    int _offset;
    VertexSemantic _semantic;
    VertexType _type;
};

class VertexData : public Ref
{
public:
    static VertexData* create();
    
    size_t getVertexStreamCount() const;
    bool setStream(VertexBuffer* buffer, const VertexStreamAttribute& stream);
    void removeStream(VertexSemantic semantic);
    const VertexStreamAttribute* getStreamAttribute(VertexSemantic semantic) const;
    VertexStreamAttribute* getStreamAttribute(VertexSemantic semantic);
    
    VertexBuffer* getStreamBuffer(VertexSemantic semantic) const;
    
    void use();
protected:
    VertexData();
    virtual ~VertexData();
protected:
    struct BufferAttribute
    {
        VertexBuffer* _buffer;
        VertexStreamAttribute _stream;
    };
    
    std::map<VertexSemantic, BufferAttribute> _vertexStreams;
protected:
    static GLint getGLSize(VertexType type);
    static GLenum getGLType(VertexType type);
    static GLint getGLSemanticBinding(VertexSemantic semantic);
};

class IndexData : public Ref
{
public:
    static IndexData* create(IndexBuffer* buffer, int start, int count);
    
    IndexBuffer* getIndexBuffer() const { return _buffer; }
    int getStart() const { return _start; }
    int getCount() const { return _count; }
    
protected:
    IndexData();
    virtual ~IndexData();
    
    bool init(IndexBuffer* buffer, int start, int count);
protected:
    IndexBuffer* _buffer;
    int _start;
    int _count;
};

NS_CC_END

#endif //__CC_VERTEX_INDEX_DATA_H__