GDIGraphics.h

#pragma once
#include "GDIGraphicsPath.h"
#include "GDIMisc.h"

namespace ParaEngine
{
    struct TextureEntity;   
    class CGDIPen;
    class CGDIDC;
    struct GUITextureElement;
    struct TextureEntity;
    class CGDIGraphics
    {
    public:
        CGDIGraphics();
        ~CGDIGraphics();

        void SetRenderTarget(TextureEntity * pEntity);
        TextureEntity* GetRenderTarget();

        HRESULT Render();
        void Invalidate(bool bInvalidate = true);
        bool IsInvalidated();

        CGDIPen* GetCurrentPen(){ return &m_currentPen;}
        void SetCurrentPen(const CGDIPen& pen){ m_currentPen = pen;}

        CGDIPen* CreatePen(string name);
        CGDIPen* GetPen(string name);

        bool SaveAs(const char* filename);
        bool LoadFromTexture(TextureEntity* pTexture);
        TextureEntity* GetDiskTexture();


        //
        // graphic manipulating functions
        //

        void Reset();

        HRESULT Clear(const Color &color);
        HRESULT DrawLine(const CGDIPen *pen,const Vector3 &point1,const Vector3 &point2);
        HRESULT DrawLines(const CGDIPen *pen, const Vector3 *points,int nNumPoints);
        HRESULT DrawImage(GUITextureElement *pElement,RECT *prcDest,float depth );
        HRESULT DrawPoint(const CGDIPen *pen,const Vector3 &point);
        
        void Undo(int nStep=1);
        void Redo(int nStep=1);

        void SetClip(const CGDIRegion &region);
        const CGDIRegion* GetClip()const{return &m_region;}

        // lock the current GDC
        CGDIDC * LockDC(){m_bLocked=true;return m_pDC;}
        void UnlockDC(){m_bLocked=false;}

        HRESULT RestoreDeviceObjects();
        HRESULT InvalidateDeviceObjects();
        
    protected:
        HRESULT CalculatePath(CGDIGraphicsPath &pPath);
        CGDIDC* m_pDC;
        bool m_bLocked;
        bool m_bInvalidated;
        CGDIGraphicsPath m_path;
        CGDIRegion m_region;
        asset_ptr<TextureEntity> m_pDiskTexture;

        CGDIPen m_currentPen;
        map <string, CGDIPen> m_pens;
    private:
    };
}