E:/Programming/MyProject/K_Game_hg/GameEngine/include/render/TextOverlay.h

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// Copyright 2006-2011 by Kat'Oun

#ifndef _TEXT_OVERLAY_H_
#define _TEXT_OVERLAY_H_

#include <EngineConfig.h>
#include <core/Types.h>
#include <render/Overlay.h>

#include <string>

namespace render
{

class Font;
        
enum Alignment
{
        A_LEFT,
        A_RIGHT,
        A_CENTER
};

class ENGINE_PUBLIC_EXPORT TextOverlay: public Overlay
{
public:

        TextOverlay();
        TextOverlay(const std::string& name);

        ~TextOverlay();

        void setFont(const std::string& name);
        void setFont(Font* font);

        Material* getMaterial() const;

        void setCaption(const std::string& caption);
        const std::string& getCaption() const;

        void setAlignment(Alignment a);
        
        Alignment getAlignment() const;

        void setCharHeight(f32 height);
        f32 getCharHeight() const;

        void setSpaceWidth(f32 width);
        f32 getSpaceWidth() const;

protected:

        void initializeImpl();

        Font* mFont;

        std::string mCaption;

        Alignment mAlignment;

        f32 mCharHeight;
        f32 mPixelCharHeight;
        f32 mSpaceWidth;
        f32 mPixelSpaceWidth;
        u32 mAllocSize;
        f32 mViewportAspectCoef;

        void initProperties();

        void updateTransformImpl();

        // Internal method to allocate memory, only reallocates when necessary
        void allocateMemory(u32 numChars);

        void updatePositionBinding();

        void updateTextureBinding();
};

} //namespace render

#endif