VertexBufferVBO.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

/*
 * Copyright (C) 2006-2010 - Frictional Games
 *
 * This file is part of HPL1 Engine.
 */

#ifndef HPL_VERTEXBUFFER_VBO_H
#define HPL_VERTEXBUFFER_VBO_H

#include "common/scummsys.h"
#include "hpl1/engine/graphics/VertexBuffer.h"

#ifdef USE_OPENGL

namespace hpl {

class cVertexBufferVBO : public iVertexBuffer {
public:
    cVertexBufferVBO(iLowLevelGraphics *apLowLevelGraphics, tVertexFlag aFlags,
                     eVertexBufferDrawType aDrawType, eVertexBufferUsageType aUsageType,
                     int alReserveVtxSize, int alReserveIdxSize);
    ~cVertexBufferVBO();

    void AddVertex(tVertexFlag aType, const cVector3f &avVtx);
    void AddColor(tVertexFlag aType, const cColor &aColor);
    void AddIndex(unsigned int alIndex);

    bool Compile(tVertexCompileFlag aFlags);
    void UpdateData(tVertexFlag aTypes, bool abIndices);

    void CreateShadowDouble(bool abUpdateData);

    void Transform(const cMatrixf &mtxTransform);

    void Draw(eVertexBufferDrawType aDrawType = eVertexBufferDrawType_LastEnum);
    void DrawIndices(unsigned int *apIndices, int alCount,
                     eVertexBufferDrawType aDrawType = eVertexBufferDrawType_LastEnum);

    void Bind();
    void UnBind();

    iVertexBuffer *CreateCopy(eVertexBufferUsageType aUsageType);

    cBoundingVolume CreateBoundingVolume();

    int GetVertexNum();
    int GetIndexNum();

    float *GetArray(tVertexFlag aType);
    unsigned int *GetIndices();

    void ResizeArray(tVertexFlag aType, int alSize);
    void ResizeIndices(int alSize);

    // For debugging purposes
    cVector3f GetVector3(tVertexFlag aType, unsigned alIdx);
    cVector3f GetVector4(tVertexFlag aType, unsigned alIdx);
    cColor GetColor(tVertexFlag aType, unsigned alIdx);
    unsigned int GetIndex(tVertexFlag aType, unsigned alIdx);

private:
    int GetElementNum(tVertexFlag aFlag);

    void SetVertexStates(tVertexFlag aFlags);

    unsigned int mlElementHandle;

    tFloatVec mvVertexArray[klNumOfVertexFlags];

    unsigned int mvArrayHandle[klNumOfVertexFlags];

    tUIntVec mvIndexArray;

    bool mbHasShadowDouble;

    bool mbCompiled;
};

} // namespace hpl

#endif // USE_OPENGL
#endif // HPL_RENDERER3D_VBO_H