transparentview.cpp

visual c++数字图像与图形处理中的光盘内容

// TransparentView.cpp : implementation of the CTransparentView class
//

#include "stdafx.h"
#include "Transparent.h"

#include "TransparentDoc.h"
#include "TransparentView.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

#include "ddb.h"
#include "TransparentColorFilter.h"
#include "TransColorDialog.h"

/////////////////////////////////////////////////////////////////////////////
// CTransparentView

IMPLEMENT_DYNCREATE(CTransparentView,  CView)

BEGIN_MESSAGE_MAP(CTransparentView,  CView)
	//{{AFX_MSG_MAP(CTransparentView)
	ON_WM_CREATE()
	ON_COMMAND(IDM_TRANSPARENT_COLOR,  OnTransparentColor)
	ON_UPDATE_COMMAND_UI(IDM_TRANSPARENT_COLOR,  OnUpdateTransparentColor)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTransparentView construction/destruction

CTransparentView::CTransparentView()
{
	// TODO: add construction code here
	m_nWidth = 800;
	m_nHeight = 600;
	m_bComposite = FALSE;
	m_byRed = m_byGreen = m_byBlue = 0;
}

CTransparentView::~CTransparentView()
{
}

BOOL CTransparentView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CTransparentView drawing

void CTransparentView::OnDraw(CDC* pDC)
{
	CTransparentDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	CDib* pDib = pDoc->m_pDib;
	if(pDib)
	{
		BeginWaitCursor();
		m_nWidth = (int)pDib->GetWidth();
		m_nHeight = (int)pDib->GetHeight(); 

		CDC memDC;
		memDC.CreateCompatibleDC(pDC);

		CBitmap* pOldBitmap = memDC.SelectObject(&m_bitmap);
		
		if(!m_bComposite)
		{
			//直接绘制到内存DDB
			pDib->Draw(memDC.m_hDC, 0, 0, m_nWidth, m_nHeight, 
					0, 0, m_nWidth, m_nHeight, DIB_RGB_COLORS, SRCCOPY);
		}
		else
		{
			//经过一次合成
			//				  src:x, y, w, h, Dst:x, y
			Filter(&memDC, pDib, 0, 0, m_nWidth, m_nHeight, 0, 0);
		}

		//从内存中输出图像
		pDC->BitBlt(0, 0, 800, 600, &memDC, 0, 0, SRCCOPY);	
		memDC.SelectObject(pOldBitmap);
		EndWaitCursor();
	}

}

/////////////////////////////////////////////////////////////////////////////
// CTransparentView diagnostics

#ifdef _DEBUG
void CTransparentView::AssertValid() const
{
	CView::AssertValid();
}

void CTransparentView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CTransparentDoc* CTransparentView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CTransparentDoc)));
	return (CTransparentDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CTransparentView message handlers

int CTransparentView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CView::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	// TODO: Add your specialized creation code here
	
	//初始化目的地图像为白色图像
	CClientDC dc(this);
	m_bitmap.CreateCompatibleBitmap(&dc, 800, 600);

	CDC memDC;
	memDC.CreateCompatibleDC(&dc);

	CBitmap* pOldBitmap = memDC.SelectObject(&m_bitmap);
	CBrush* pBrush = new CBrush(RGB(255, 255, 255));
	CRect rect(0, 0, 800, 600);
	memDC.FillRect(rect, pBrush);
	memDC.SelectObject(pOldBitmap);
	delete pBrush;
	ReleaseDC(&dc);
	
	return 0;
}

//pDC								表示设备描述表
//pDib								表示输入图像(DIB)
//(nXSrc, nYSrc, nWidth, nHeight)	表示合成输入源的哪部分区域:位置和大小
//nXDst, nYDst						表示从目的地什么位置开始
void CTransparentView::Filter(CDC *pDC, CDib *pDib,  int nXSrc,  int nYSrc,  int nWidth,  int nHeight, int nXDst,  int nYDst)
{
	ASSERT(pDib);
		//限制处理的区域----防止任意填写数据而使用访问无效
	if((nXSrc > (m_nWidth - 1)) || (nYSrc > (m_nHeight - 1))) return ;
	if((nXDst > 799) || (nYSrc > 599)) return ;

	// 32位颜色数据:输入源
	DWORD dwSizeSrc = m_nWidth * m_nHeight * 4;

	//分配全局内存 32位源数据
	BYTE* pbyBitsSrc32 =  new BYTE[dwSizeSrc];
	if(pbyBitsSrc32 == NULL) return;
	memset(pbyBitsSrc32, 0, dwSizeSrc);



	//目的地的有效宽度和有效高度
	//目的地DDB实际能够处理的宽度和高度
	int nWidthDst = min(nWidth, 800 - nXDst);
	int nHeightDst = min(nHeight, 600 - nYDst);
	
	DWORD dwSizeDst = ((DWORD)(nWidthDst * nHeightDst)) * 4;
	
	BYTE* pbyBitsDst32 =  new BYTE[dwSizeDst];
	if(pbyBitsDst32 == NULL) return;
	memset(pbyBitsDst32, 0, dwSizeDst);

	
	//CDib类只提供了一个全部数据的函数
	pDib->GetDdbData32(pbyBitsSrc32);
	
	CDdb* pDdb = new CDdb(&m_bitmap);

	//获取DDB数据
	//获取数据后, 其基本参考点变为(0, 0).
	pDdb->GetDdbDataTo32(nXDst, nYDst, nWidthDst, nHeightDst, pbyBitsDst32);
	
	pDdb->ClearMemory();
	
	CTransparentColorFilter* tcf = new CTransparentColorFilter();
	
	//设置透明颜色
	tcf->SetTransparentColor(m_byRed, m_byGreen, m_byBlue);
	//透明色过滤
	tcf->Filter(nXSrc, nYSrc, nWidth, nHeight, 0, 0, pbyBitsSrc32, m_nWidth, m_nHeight, pbyBitsDst32, nWidthDst, nHeightDst);

	CClientDC dc(this);
	CDC memDC;
	memDC.CreateCompatibleDC(&dc);
	HBITMAP hBitmap = tcf->CreateDdb(pDC->m_hDC, nWidthDst, nHeightDst, pbyBitsDst32);
	HBITMAP hOldBitmap = (HBITMAP)memDC.SelectObject(hBitmap);
	pDC->BitBlt(nXDst, nYDst, nWidthDst, nHeightDst, &memDC, 0, 0, SRCCOPY);
	::DeleteObject(hBitmap);
	memDC.SelectObject(hOldBitmap);

	delete tcf;

	delete[] pbyBitsDst32;
	delete[] pbyBitsSrc32;

	ReleaseDC(&dc);

}

void CTransparentView::OnTransparentColor() 
{
	// TODO: Add your command handler code here
			
	CTransColorDialog rgbDlg;
	rgbDlg.m_byRed = m_byRed;
	rgbDlg.m_byGreen = m_byGreen;
	rgbDlg.m_byBlue = m_byBlue;
	rgbDlg.m_bComposite = m_bComposite;

	int responeDlg = rgbDlg.DoModal();
	if(responeDlg == IDOK)
	{
		m_byRed = rgbDlg.m_byRed;
		m_byGreen = rgbDlg.m_byGreen;
		m_byBlue = rgbDlg.m_byBlue;
		m_bComposite = rgbDlg.m_bComposite;
	}
}

void CTransparentView::OnUpdateTransparentColor(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	if(m_bComposite)
		pCmdUI ->SetCheck(TRUE);
	else
		pCmdUI ->SetCheck(FALSE);
}