// CHBufferDC.cpp : ±¸Çö ÆÄÀÏÀÔ´Ï´Ù.
//

#include "stdafx.h"
#include "CHBufferDC.h"


//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CCHBufferDC::CCHBufferDC(CWnd *pParent) : m_pParent(pParent)
{
	ASSERT(pParent);

	//´ë»ó À©µµ¿ì¿¡ ´ëÇÑ Á¤º¸¸¦ ¼öÁýÇÑ´Ù.
	m_pTarget = m_pParent->BeginPaint(&m_PaintStruct);
	m_pParent->GetClientRect(&m_RcClient);
	m_pParent->GetWindowRect(&m_RcWindow);

	//´ë»ó À©µµ¿ì¿¡ ´ëÇÑ DC¸¦ »ý¼ºÇÑ´Ù.
	m_MemoryDC.CreateCompatibleDC(m_pTarget);
	//´ë»ó DC¿¡ ´ëÇÑ ¸Þ¸ð¸® ºñÆ®¸ÊÀ» »ý¼ºÇÏ¿© Select ÇÑ´Ù.
	m_MemoryBmp.CreateBitmap(m_RcClient.Width(), m_RcClient.Height(), 
		m_MemoryDC.GetDeviceCaps(PLANES),
		m_MemoryDC.GetDeviceCaps(BITSPIXEL), 0);
	m_pOldMemoryBmp = m_MemoryDC.SelectObject(&m_MemoryBmp);

	//¸Þ¸ð¸® ¹öÆÛ¿¡ AttachÇÑ´Ù.
	Attach(m_MemoryDC);
}

//////////////////////////////////////////////////////////////////////
CCHBufferDC::~CCHBufferDC()
{
	//¸Þ¸ð¸® DCÀÇ ³»¿ëÀ» ´ë»ó À©µµ¿ì¿¡ Ãâ·ÂÇÑ´Ù.
	//³»ºÎÀûÀ¸·Î ºñÆ®¸Ê¿¡ Ãâ·ÂÇÑ °ÍÀ̹ǷΠÇØ´ç ºñÆ®¸ÊÀ» 1:1·Î º¹»çÇÑ´Ù.
	m_pTarget->BitBlt(
		m_PaintStruct.rcPaint.left,
		m_PaintStruct.rcPaint.top, 
		m_PaintStruct.rcPaint.right - m_PaintStruct.rcPaint.left, 
		m_PaintStruct.rcPaint.bottom - m_PaintStruct.rcPaint.top, 
		&m_MemoryDC,
		m_PaintStruct.rcPaint.left,
		m_PaintStruct.rcPaint.top, SRCCOPY);

	m_MemoryDC.SelectObject(m_pOldMemoryBmp);
	m_pParent->EndPaint(&m_PaintStruct);

	Detach();
}

//////////////////////////////////////////////////////////////////////
BOOL CCHBufferDC::Attach(HDC hDC)
{
	return CDC::Attach(hDC);
}

//////////////////////////////////////////////////////////////////////
HDC CCHBufferDC::Detach()
{
	return CDC::Detach();
}