zhuanzhiview.cpp

图像的转置

// zhuanzhiView.cpp : implementation of the CZhuanzhiView class
//

#include "stdafx.h"
#include "zhuanzhi.h"

#include "zhuanzhiDoc.h"
#include "zhuanzhiView.h"
#include "GeoTrans.h"
#include "dibapi.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CZhuanzhiView

IMPLEMENT_DYNCREATE(CZhuanzhiView, CView)

BEGIN_MESSAGE_MAP(CZhuanzhiView, CView)
	//{{AFX_MSG_MAP(CZhuanzhiView)
	ON_COMMAND(ID_tuxiangzhuanzhi, Ontuxiangzhuanzhi)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CZhuanzhiView construction/destruction

CZhuanzhiView::CZhuanzhiView()
{
	// TODO: add construction code here

}

CZhuanzhiView::~CZhuanzhiView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CZhuanzhiView drawing

void CZhuanzhiView::OnDraw(CDC* pDC)
{
BeginWaitCursor();

	// 获取文档
	CZhuanzhiDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	
	
	// 获取DIB
	HDIB hDIB = pDoc->GetHDIB();
	
	// 判断DIB是否为空
	if (hDIB != NULL)
	{
		LPSTR lpDIB = (LPSTR) ::GlobalLock((HGLOBAL) hDIB);
		
		// 获取DIB宽度
		int cxDIB = (int) ::DIBWidth(lpDIB);
		
		// 获取DIB高度
		int cyDIB = (int) ::DIBHeight(lpDIB);

		::GlobalUnlock((HGLOBAL) hDIB);
		
		CRect rcDIB;
		rcDIB.top = rcDIB.left = 0;
		rcDIB.right = cxDIB;
		rcDIB.bottom = cyDIB;
		
		CRect rcDest;
		
		// 判断是否是打印
		if (pDC->IsPrinting())
		{
			// 是打印，计算输出图像的位置和大小，以便符合页面
			
			// 获取打印页面的水平宽度(象素)
			int cxPage = pDC->GetDeviceCaps(HORZRES);
			
			// 获取打印页面的垂直高度(象素)
			int cyPage = pDC->GetDeviceCaps(VERTRES);
			
			// 获取打印机每英寸象素数
			int cxInch = pDC->GetDeviceCaps(LOGPIXELSX);
			int cyInch = pDC->GetDeviceCaps(LOGPIXELSY);
			
			// 计算打印图像大小（缩放，根据页面宽度调整图像大小）
			rcDest.top = rcDest.left = 0;
			rcDest.bottom = (int)(((double)cyDIB * cxPage * cyInch)
					/ ((double)cxDIB * cxInch));
			rcDest.right = cxPage;
			
			// 计算打印图像位置（垂直居中）
			int temp = cyPage - (rcDest.bottom - rcDest.top);
			rcDest.bottom += temp/2;
			rcDest.top += temp/2;

		}
		else   
		// 非打印
		{
			// 不必缩放图像
			rcDest = rcDIB;
		}
		
		// 输出DIB
		::PaintDIB(pDC->m_hDC, &rcDest, pDoc->GetHDIB(),
			&rcDIB, pDoc->GetDocPalette());
	}
	
	// 恢复正常光标
	EndWaitCursor();
	// TODO: add draw code for native data here
}

/////////////////////////////////////////////////////////////////////////////
// CFreTrans1View printing

BOOL CZhuanzhiView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

/////////////////////////////////////////////////////////////////////////////
// CZhuanzhiView printing


void CZhuanzhiView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CZhuanzhiView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CZhuanzhiView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CZhuanzhiView message handlers

void CZhuanzhiView::Ontuxiangzhuanzhi() 
{
		// 图像转置

	// 获取文档
	CZhuanzhiDoc* pDoc = GetDocument();
	
	// 指向DIB的指针
	LPSTR lpDIB;
	
	// 锁定DIB
	lpDIB = (LPSTR) ::GlobalLock((HGLOBAL) pDoc->GetHDIB());
	
	// 判断是否是8-bpp位图（这里为了方便，只处理8-bpp位图的转置，其它的可以类推）
	if (::DIBNumColors(lpDIB) != 256)
	{
		// 提示用户
		MessageBox("目前只支持256色位图的转置！", "系统提示" , MB_ICONINFORMATION | MB_OK);

		// 解除锁定
		::GlobalUnlock((HGLOBAL) pDoc->GetHDIB());
		
		// 返回
		return;
	}
	
	
	// 更改光标形状
	BeginWaitCursor();
	
	// 调用TransposeDIB()函数转置DIB
	if (TransposeDIB(lpDIB))
	{
		
		// 设置脏标记
		pDoc->SetModifiedFlag(TRUE);
		
		// 更新DIB大小和调色板
		pDoc->InitDIBData();
		
		// 重新设置滚动视图大小
		//SetScrollSizes(MM_TEXT, pDoc->GetDocSize());

		// 更新视图
		pDoc->UpdateAllViews(NULL);
	}
	else
	{
		// 提示用户
		MessageBox("分配内存失败！", "系统提示" , MB_ICONINFORMATION | MB_OK);
	}
	
	// 解除锁定
	::GlobalUnlock((HGLOBAL) pDoc->GetHDIB());

	// 恢复光标
	EndWaitCursor();	
	
}