GPUProgram.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_GPU_PROGRAM_H
#define HPL_GPU_PROGRAM_H

#include "hpl1/engine/graphics/GraphicsTypes.h"
#include "hpl1/engine/math/MathTypes.h"
#include "hpl1/engine/resources/ResourceBase.h"
#include "hpl1/engine/system/SystemTypes.h"

namespace hpl {

class iTexture;

enum eGpuProgramType {
    eGpuProgramType_Vertex,
    eGpuProgramType_Fragment,
    eGpuProgramType_LastEnum
};

enum eGpuProgramMatrix {
    eGpuProgramMatrix_View,
    eGpuProgramMatrix_Projection,
    eGpuProgramMatrix_Texture,
    eGpuProgramMatrix_ViewProjection,
    eGpuProgramMatrix_LastEnum
};

enum eGpuProgramMatrixOp {
    eGpuProgramMatrixOp_Identity,
    eGpuProgramMatrixOp_Inverse,
    eGpuProgramMatrixOp_Transpose,
    eGpuProgramMatrixOp_InverseTranspose,
    eGpuProgramMatrixOp_LastEnum
};

class iGpuProgram : public iResourceBase {
public:
    iGpuProgram(const tString &asName) : iResourceBase(asName, 0) {
    }
    virtual ~iGpuProgram() {}

    static void SetLogDebugInformation(bool abX) { mbDebugInfo = abX; }

    virtual void Bind() = 0;
    virtual void UnBind() = 0;

    virtual bool SetFloat(const tString &asName, float afX) = 0;

    bool SetVec2f(const tString &asName, const cVector2f avVec) {
        return SetVec2f(asName, avVec.x, avVec.y);
    }
    virtual bool SetVec2f(const tString &asName, float afX, float afY) = 0;

    bool SetVec3f(const tString &asName, const cVector3f &avVec) {
        return SetVec3f(asName, avVec.x, avVec.y, avVec.z);
    }
    bool SetColor3f(const tString &asName, const cColor &aCol) {
        return SetVec3f(asName, aCol.r, aCol.g, aCol.b);
    }
    virtual bool SetVec3f(const tString &asName, float afX, float afY, float afZ) = 0;

    bool SetColor4f(const tString &asName, const cColor &aCol) {
        return SetVec4f(asName, aCol.r, aCol.g, aCol.b, aCol.a);
    }
    virtual bool SetVec4f(const tString &asName, float afX, float afY, float afZ, float afW) = 0;

    virtual bool SetMatrixf(const tString &asName, const cMatrixf &mMtx) = 0;
    virtual bool SetMatrixf(const tString &asName, eGpuProgramMatrix mType,
                            eGpuProgramMatrixOp mOp) = 0;

protected:
    static bool mbDebugInfo;
};

} // namespace hpl

#endif // HPL_GPU_PROGRAM_H