zgraphddb.cpp

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#include "zGraphDDB.h"

//##ModelId=3FFA652B0068
zGraphDDB::zGraphDDB()
{
	m_hBitmap = NULL;
	m_hMemDC = NULL;
	m_hOldBmp = NULL;
}


//##ModelId=3FFA652B007C
zGraphDDB::~zGraphDDB()
{
	ReleaseDDB();
}

//##ModelId=3FFA68A502B7
void zGraphDDB::ReleaseDDB()
{
	if ( m_hMemDC )
	{
		SelectObject(m_hMemDC, m_hOldBmp);
		DeleteObject(m_hMemDC);
		m_hMemDC = NULL;
	}

	if ( m_hBitmap )
	{
		DeleteObject(m_hBitmap);
		m_hBitmap = NULL;
	}

	m_hOldBmp = NULL;
}

//##ModelId=3FFA68BF028C
bool zGraphDDB::Prepare(int &width, int &height)
{
	BITMAP bmp;

	if ( ! GetObject(m_hBitmap, sizeof(bmp), & bmp) )
		return false;

	width  = bmp.bmWidth;
	height = bmp.bmHeight;

	if ( m_hMemDC==NULL )	// ensure memdc is created
	{
		HDC hDC = GetDC(NULL);
		m_hMemDC = CreateCompatibleDC(hDC);
		ReleaseDC(NULL, hDC);

		m_hOldBmp = (HBITMAP) SelectObject(m_hMemDC, m_hBitmap);
	}

	return true;
}

//##ModelId=3FFA68ED01CA
HBITMAP zGraphDDB::GetBitmap() const
{
	return m_hBitmap;
}

//##ModelId=3FFA690B00B5
bool zGraphDDB::CreateDDB(int width, int height, HDC hdc)
{
	return 1;
}

//##ModelId=3FFA694B00CB
bool zGraphDDB::Attach(HBITMAP hBmp)
{
	if ( hBmp==NULL )
		return FALSE;

	if ( m_hOldBmp )	// deselected m_hBitmap
	{
		SelectObject(m_hMemDC, m_hOldBmp);
		m_hOldBmp = NULL;
	}

	if ( m_hBitmap )	// delete current bitmap
		DeleteObject(m_hBitmap);

	m_hBitmap = hBmp;	// replace with new one

	if ( m_hMemDC )		// select if has memory DC
	{
		m_hOldBmp = (HBITMAP) SelectObject(m_hMemDC, m_hBitmap);
		return m_hOldBmp != NULL;
	}
	else
		return TRUE;
}

//##ModelId=3FFA696502F9
bool zGraphDDB::LoadBitmap(HINSTANCE hInst, int id)
{
	return Attach(::LoadBitmap(hInst,MAKEINTRESOURCE(id)));
}

//##ModelId=3FFA69970391
bool zGraphDDB::Draw(HDC hDC, int x0, int y0, int w, int h, DWORD rop, int opt)
{
	int bmpwidth, bmpheight;

	if ( ! Prepare(bmpwidth, bmpheight) )
		return FALSE;

	switch ( opt )
	{
		case draw_normal:
			return BitBlt(hDC, x0, y0, bmpwidth, bmpheight, m_hMemDC, 0, 0, rop);

		case draw_center:
			return BitBlt(hDC, x0 + (w-bmpwidth)/2, y0 + ( h-bmpheight)/2,
				bmpwidth, bmpheight, m_hMemDC, 0, 0, rop);
			break;
			
		case draw_tile:
		{
			for (int j=0; j<h; j+= bmpheight)
			for (int i=0; i<w; i+= bmpwidth)
				if ( ! BitBlt(hDC, x0+i, y0+j, bmpwidth, bmpheight, m_hMemDC, 0, 0, rop) )
					return FALSE;

			return TRUE;
		}
		break;

		case draw_stretch:
			return StretchBlt(hDC, x0, y0, w, h, m_hMemDC, 0, 0, bmpwidth, bmpheight, rop);

		case draw_stretchprop:
		{
			int ww = w;
			int hh = h;

			if ( w * bmpheight < h * bmpwidth )	// w/bmWidth is the mimimum scale
				hh = bmpheight * w / bmpwidth;
			else
				ww = bmpwidth  * h / bmpheight;

			// propertional scaling and centering
			return StretchBlt(hDC, x0 + (w-ww)/2, y0 + (h-hh)/2, ww, hh, m_hMemDC, 0, 0, bmpwidth, bmpheight, rop);
		}

		default:
			return FALSE;
	}}