/**************************************************************************************************
    Structure
**************************************************************************************************/
/*=================================================================================================
    RGB
=================================================================================================*/
typedef struct tagCOLOR_RGB{
    BYTE                            bRed;
    BYTE                            bGreen;
    BYTE                            bBlue;
}COLOR_RGB,*LPCOLOR_RGB;
/**************************************************************************************************
    Const parameter
**************************************************************************************************/
//=== Heap size ===================================================================================

#define GRAPHIC_HEAP_SIZE         65536
//=== Default bit count ===========================================================================

#define DEFAULT_BIT_COUNT         24
/**************************************************************************************************
    class declaration
**************************************************************************************************/
class ClassGraphicEngine{
    //=== constructor =============================================================================

    public:
        ClassGraphicEngine(HWND,INT,INT);
    //=== destructor ==============================================================================

    public:
        ~ClassGraphicEngine(void);

    //=== Variable ================================================================================

    private:
        HANDLE                      hHeap;
        HBITMAP                     hBitmap;
        HWND                        hTargetWnd;
        SIZE                        size;
        UINT                        uiBitLength;
        LPBITMAPINFO                lpBitmapInfo;
        LPRGBQUAD                   lpRgbQuad;
        LPBYTE                      lpBit;

    //=== Change state ============================================================================

    public:
        //--- Change size -------------------------------------------------------------------------

        VOID                        ChangeSize(INT,INT);

    //=== Update ==================================================================================

    public:
        //--- Transfer bit block ------------------------------------------------------------------

        VOID                        BitMove(HDC,INT,INT,INT,INT);

    //=== Draw control ============================================================================

    public:
        //--- Rectangle ---------------------------------------------------------------------------

        VOID                        DC_Rectangle(INT,INT,INT,INT,COLORREF,DWORD);
        VOID                        DC_Rectangle(INT,INT,INT,INT,COLORREF);
};
/**************************************************************************************************
    File end
**************************************************************************************************/

/**************************************************************************************************
    class definition
**************************************************************************************************/
/*=================================================================================================
    constructor
=================================================================================================*/
ClassGraphicEngine::ClassGraphicEngine(HWND hWnd,INT cx,INT cy)
{
    this->hTargetWnd = hWnd;
    this->size.cx = cx;
    this->size.cy = cy;
    this->uiBitLength = size.cx * 3 + (4 - (size.cx * 3) % 4);

    //--- Create heap -----------------------------------------------------------------------------

    this->hHeap = HeapCreate(HEAP_GENERATE_EXCEPTIONS,HEAP_INIT_SIZE,0);

    //--- Get device context ----------------------------------------------------------------------

    HDC        hDC = GetDC(hWnd);

    //--- Allocate heap ---------------------------------------------------------------------------

    DWORD                     dwSize = sizeof(BITMAPINFO);
    this->lpBitmapInfo = (LPBITMAPINFO)HeapAlloc(this->hHeap,HEAP_GENERATE_EXCEPTIONS | HEAP_ZERO_MEMORY,dwSize);

    //--- Create DIB ------------------------------------------------------------------------------

    this->lpBitmapInfo->bmiHeader.biSize            = sizeof(BITMAPINFOHEADER);
    this->lpBitmapInfo->bmiHeader.biWidth           = cx;
    this->lpBitmapInfo->bmiHeader.biHeight          = cy;
    this->lpBitmapInfo->bmiHeader.biPlanes          = 1;
    this->lpBitmapInfo->bmiHeader.biBitCount        = DEFAULT_BIT_COUNT;
    this->lpBitmapInfo->bmiHeader.biCompression     = BI_RGB;
    this->lpBitmapInfo->bmiHeader.biSizeImage       = 0;
    this->lpBitmapInfo->bmiHeader.biXPelsPerMeter   = 0;
    this->lpBitmapInfo->bmiHeader.biYPelsPerMeter   = 0;
    this->lpBitmapInfo->bmiHeader.biClrUsed         = 0;
    this->lpBitmapInfo->bmiHeader.biClrImportant    = 0;

    this->hBitmap = CreateDIBSection(hDC,this->lpBitmapInfo,DIB_RGB_COLORS,(LPVOID *)(&this->lpBit),NULL,0);
    if (hBitmap == NULL){
        DebugMessage("It failed in the initialization of the graphic engine.");
    }

    ReleaseDC(hWnd,hDC);

}
/*=================================================================================================
    denstructor
=================================================================================================*/
ClassGraphicEngine::~ClassGraphicEngine(void)
{
    if (hBitmap)DeleteObject(this->hBitmap);

    HeapDestroy(this->hHeap);
}

/*=================================================================================================
    Change state
=================================================================================================*/
/*-------------------------------------------------------------------------------------------------
    Change size
-------------------------------------------------------------------------------------------------*/
VOID ClassGraphicEngine::ChangeSize(INT cx,INT cy)
{
    if (hBitmap)DeleteObject(this->hBitmap);

    this->size.cx = cx;
    this->size.cy = cy;
    this->uiBitLength = size.cx * 3 + (4 - (size.cx * 3) % 4);

    //--- Get device context ----------------------------------------------------------------------

    HDC        hDC = GetDC(this->hTargetWnd);

    //--- Create DIB ------------------------------------------------------------------------------

    this->lpBitmapInfo->bmiHeader.biSize            = sizeof(BITMAPINFOHEADER);
    this->lpBitmapInfo->bmiHeader.biWidth           = cx;
    this->lpBitmapInfo->bmiHeader.biHeight          = cy;
    this->lpBitmapInfo->bmiHeader.biPlanes          = 1;
    this->lpBitmapInfo->bmiHeader.biBitCount        = DEFAULT_BIT_COUNT;
    this->lpBitmapInfo->bmiHeader.biCompression     = BI_RGB;
    this->lpBitmapInfo->bmiHeader.biSizeImage       = 0;
    this->lpBitmapInfo->bmiHeader.biXPelsPerMeter   = 0;
    this->lpBitmapInfo->bmiHeader.biYPelsPerMeter   = 0;
    this->lpBitmapInfo->bmiHeader.biClrUsed         = 0;
    this->lpBitmapInfo->bmiHeader.biClrImportant    = 0;

    this->hBitmap = CreateDIBSection(hDC,this->lpBitmapInfo,DIB_RGB_COLORS,(LPVOID *)(&this->lpBit),NULL,0);
    if (hBitmap == NULL){
        DebugMessage("It failed in the initialization of the graphic engine.");
    }

    ReleaseDC(this->hTargetWnd,hDC);

}
/*=================================================================================================
    Update
=================================================================================================*/
/*-------------------------------------------------------------------------------------------------
    Transfer bit block
-------------------------------------------------------------------------------------------------*/
VOID ClassGraphicEngine::BitMove(HDC hDC,INT x,INT y,INT cx,INT cy)
{
    if (hBitmap == NULL)return;
    HDC        hMemDC = CreateCompatibleDC(hDC);
    SelectObject(hMemDC,this->hBitmap);

    StretchBlt(hDC,x,y,cx,cy,hMemDC,0,0,this->size.cx,this->size.cy,SRCCOPY);
    DeleteDC(hMemDC);
}
/*=================================================================================================
    Update
=================================================================================================*/
/*-------------------------------------------------------------------------------------------------
    Rectangle
-------------------------------------------------------------------------------------------------*/
VOID ClassGraphicEngine::DC_Rectangle(INT x,INT y,INT cx,INT cy,COLORREF color,DWORD uiAlfaPoint)
{
    if (hBitmap == NULL)return;
    POINT                     DrawPos;
    DrawPos.x = x;
    DrawPos.y = this->size.cy - y - cy;

    //--- Get color -------------------------------------------------------------------------------

    COLOR_RGB                  Rgb;
    Rgb.bRed    = GetRValue(color);
    Rgb.bGreen  = GetGValue(color);
    Rgb.bBlue   = GetBValue(color);

    INT        i,j;
    for(j = DrawPos.y;j < DrawPos.y + cy;j++){
        for(i = DrawPos.x;i < DrawPos.x + cx;i++){
            *(this->lpBit + (this->uiBitLength * j) + (i * 3) + 0) = Rgb.bBlue;
            *(this->lpBit + (this->uiBitLength * j) + (i * 3) + 1) = Rgb.bGreen;
            *(this->lpBit + (this->uiBitLength * j) + (i * 3) + 2) = Rgb.bRed;
        }
    }
    return;
}
VOID ClassGraphicEngine::DC_Rectangle(INT x,INT y,INT cy,INT cy,COLORREF color)
{
}
/**************************************************************************************************
    File end
**************************************************************************************************/