GPC_Canvas.h

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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 2
 * 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, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef _GPC_CANVAS_H_
#define _GPC_CANVAS_H_

#include "RAS_ICanvas.h"
#include "RAS_Rect.h"

#ifdef WIN32
    #pragma warning (disable:4786) // suppress stl-MSVC debug info warning
    #include <windows.h>
#endif // WIN32

#include "GL/glew.h"

#include <map>


class GPC_Canvas : public RAS_ICanvas
{
public:
    typedef enum {
        alignTopLeft,
        alignBottomRight
    } TBannerAlignment;

    typedef int TBannerId;

protected:
    typedef struct {
        TBannerAlignment alignment;
        bool enabled;
        unsigned int displayWidth;
        unsigned int displayHeight;
        unsigned int imageWidth;
        unsigned int imageHeight;
        unsigned char* imageData;
        unsigned int textureName;
    } TBannerData;
    typedef std::map<TBannerId, TBannerData> TBannerMap;

    int m_width;
    int m_height;
    RAS_Rect m_displayarea;

    TBannerMap m_banners;
    bool m_bannersEnabled;

public:

    GPC_Canvas(int width, int height);

    virtual ~GPC_Canvas();

    void Resize(int width, int height);


        int 
    GetWidth(
    ) const {
        return m_width;
    }
    
        int 
    GetHeight(
    ) const {
        return m_height;
    }

    const 
        RAS_Rect &
    GetDisplayArea(
    ) const {
        return m_displayarea;
    };

        void
    SetDisplayArea(
        RAS_Rect *rect
    ) {
        m_displayarea= *rect;
    };
    
        RAS_Rect &
    GetWindowArea(
    ) {
        return m_displayarea;
    }

        void 
    BeginFrame(
    ) {};

        void 
    EndFrame(
    );
    
    void SetViewPort(int x1, int y1, int x2, int y2);

    void ClearColor(float r, float g, float b, float a);

    void SetMouseState(RAS_MouseState mousestate)
    {
        // not yet      
    }

    void SetMousePosition(int x, int y)
    {
        // not yet
    }

    virtual void MakeScreenShot(const char* filename);

    void ClearBuffer(int type);

    TBannerId AddBanner(
        unsigned int bannerWidth, unsigned int bannerHeight,
        unsigned int imageWidth, unsigned int imageHeight,
        unsigned char* imageData, TBannerAlignment alignment = alignTopLeft, 
        bool enabled = true);

    void DisposeBanner(TBannerId id);

    void DisposeAllBanners();

    void SetBannerEnabled(TBannerId id, bool enabled = true);

    void SetBannerDisplayEnabled(bool enabled = true);

protected:
    void DisposeBanner(TBannerData& banner);

    void DrawAllBanners(void);

    void DrawBanner(TBannerData& banner);

    struct CanvasRenderState {
        int oldLighting;
        int oldDepthTest;
        int oldFog;
        int oldTexture2D;
        int oldBlend;
        int oldBlendSrc;
        int oldBlendDst;
        float oldColor[4];
        int oldWriteMask;
    };

        void            
    PushRenderState(
        CanvasRenderState & render_state
    );
        void
    PopRenderState(
        const CanvasRenderState & render_state
    );

        void
    SetOrthoProjection(
    );
    
    static TBannerId s_bannerId;
};

#endif // _GPC_CANVAS_H_