Material_Alpha.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_MATERIAL_ALPHA_H
#define HPL_MATERIAL_ALPHA_H

#include "hpl1/engine/graphics/GPUProgram.h"
#include "hpl1/engine/graphics/Material.h"

namespace hpl {

class cMaterial_Alpha : public iMaterial {
public:
    cMaterial_Alpha(const tString &asName, iLowLevelGraphics *apLowLevelGraphics,
                    cImageManager *apImageManager, cTextureManager *apTextureManager,
                    cRenderer2D *apRenderer, cGpuProgramManager *apProgramManager,
                    eMaterialPicture aPicture, cRenderer3D *apRenderer3D);

    virtual ~cMaterial_Alpha();

    tTextureTypeList GetTextureTypes();

    bool UsesType(eMaterialRenderType aType);

    iGpuProgram *getGpuProgram(const eMaterialRenderType aType, const int alPass, iLight3D *apLight);
    iMaterialProgramSetup *getGpuProgramSetup(const eMaterialRenderType aType, const int alPass, iLight3D *apLight);

    bool VertexProgramUsesLight(eMaterialRenderType aType, int alPass, iLight3D *apLight);
    bool VertexProgramUsesEye(eMaterialRenderType aType, int alPass, iLight3D *apLight);

    eMaterialAlphaMode GetAlphaMode(eMaterialRenderType aType, int alPass, iLight3D *apLight);
    eMaterialBlendMode GetBlendMode(eMaterialRenderType aType, int alPass, iLight3D *apLight);
    eMaterialChannelMode GetChannelMode(eMaterialRenderType aType, int alPass, iLight3D *apLight);

    iTexture *GetTexture(int alUnit, eMaterialRenderType aType, int alPass, iLight3D *apLight);
    eMaterialBlendMode GetTextureBlend(int alUnit, eMaterialRenderType aType, int alPass, iLight3D *apLight);

    int GetNumOfPasses(eMaterialRenderType aType, iLight3D *apLight) { return 1; }

    // Old and worthless stuff, only used by 2D renderer
    void Compile() {}
    bool StartRendering(eMaterialRenderType aType, iCamera *apCam, iLight *pLight) { return false; }
    void EndRendering(eMaterialRenderType aType) {}
    tVtxBatchFlag GetBatchFlags(eMaterialRenderType aType) { return 0; }
    bool NextPass(eMaterialRenderType aType) { return false; }
    bool HasMultiplePasses(eMaterialRenderType aType) { return false; }
    eMaterialType GetType(eMaterialRenderType aType) { return eMaterialType_Diffuse; }
    void EditVertexes(eMaterialRenderType aType, iCamera *apCam, iLight *pLight,
                      tVertexVec *apVtxVec, cVector3f *apTransform, unsigned int alIndexAdd) {}

private:
    iGpuProgram *_fogShader;
};

class cMaterialType_Alpha : public iMaterialType {
public:
    bool IsCorrect(tString asName) {
        return cString::ToLowerCase(asName) == "alpha";
    }

    iMaterial *Create(const tString &asName, iLowLevelGraphics *apLowLevelGraphics,
                      cImageManager *apImageManager, cTextureManager *apTextureManager,
                      cRenderer2D *apRenderer, cGpuProgramManager *apProgramManager,
                      eMaterialPicture aPicture, cRenderer3D *apRenderer3D) {
        return hplNew(cMaterial_Alpha, (asName, apLowLevelGraphics,
                                        apImageManager, apTextureManager, apRenderer,
                                        apProgramManager, aPicture, apRenderer3D));
    }
};

} // namespace hpl

#endif // HPL_MATERIAL_ALPHA_H