图形图象

开发平台：
Visual C++

Video DemoView.cpp：源码内容
							// Video DemoView.cpp : implementation of the CVideoDemoView class
//
#include "stdafx.h"
#include "Video Demo.h"
#include "Video DemoDoc.h"
#include "Video DemoView.h"
#include "colortrans.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CVideoDemoView
IMPLEMENT_DYNCREATE(CVideoDemoView, CView)
BEGIN_MESSAGE_MAP(CVideoDemoView, CView)
	//{{AFX_MSG_MAP(CVideoDemoView)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}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()
/////////////////////////////////////////////////////////////////////////////
// CVideoDemoView construction/destruction
CVideoDemoView::CVideoDemoView()
{
	// TODO: add construction code here
	this->data = NULL;
	this->outputAvailable = false;
}
CVideoDemoView::~CVideoDemoView()
{
	if(this->data != NULL)
	delete[] data;  // 释放输出缓冲
}
BOOL CVideoDemoView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs
	return CView::PreCreateWindow(cs);
}
/////////////////////////////////////////////////////////////////////////////
// CVideoDemoView drawing
/////////////////////////////////////////////////////////////////////////////
// CVideoDemoView printing
BOOL CVideoDemoView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}
void CVideoDemoView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}
void CVideoDemoView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}
/////////////////////////////////////////////////////////////////////////////
// CVideoDemoView diagnostics
#ifdef _DEBUG
void CVideoDemoView::AssertValid() const
{
	CView::AssertValid();
}
void CVideoDemoView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}
CVideoDemoDoc* CVideoDemoView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CVideoDemoDoc)));
	return (CVideoDemoDoc*)m_pDocument;
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CVideoDemoView message handlers
/************************************************************************/
/* 绘图函数                                                             */
/************************************************************************/
void CVideoDemoView::OnDraw(CDC* pDC)
{
	if(outputAvailable)   // 允许输出图像数据
	{
		pDC->SetStretchBltMode(STRETCH_DELETESCANS);
		StretchDIBits(pDC->m_hDC,0,0,imgWidth,imgHeight,
			0,0,imgWidth,imgHeight,
			data, &bitmapInfo, DIB_RGB_COLORS,SRCCOPY);
	}
}
/************************************************************************/
/* OnActiveView                                                         */
/* 当视图切换时改变当前数据                                             */
/************************************************************************/
void  CVideoDemoView::OnActivateView(BOOL bActivate,CView* pActivateView,CView* pDeactiveView)
{
	if(bActivate == TRUE)
	{
		CVideoDemoDoc *doc = (CVideoDemoDoc*)GetDocument();
		
		theApp.lastImageData = theApp.curImageData;  // 设置上一次的数据位置
		theApp.curImageData = doc->id;   // 设置当前的doc
		if(doc->id != NULL)
			TRACE("Change View Index : %dn",doc->id->index);
		else
			TRACE("Change View Index NULL IDn");
	}
}
/************************************************************************/
/* 允许输出数据                                                         */
/************************************************************************/
void CVideoDemoView::RefreshData()
{
	// 自动获取图像数据源
	CVideoDemoDoc* pDoc = GetDocument();
	//ASSERT_VALID(pDoc);
	// 显示图像
	ImageData *id = pDoc->id;           // 图像数据
	
	if(data != NULL)
		delete[] data;
	data = new unsigned char[id->imgWidth * id->imgHeight * 3];
	ColorTrans ct;
	switch(id->format)
	{
	case IMAGE_FORMAT_GRAY8:
		// 8位灰度图像
		ct.gray2RGB2(id->data,data,id->imgWidth,id->imgHeight);
		this->imgWidth = id->imgWidth;
		this->imgHeight = id->imgHeight;
		memset(&bitmapInfo,0,sizeof(BITMAPINFO));
		bitmapInfo.bmiHeader.biHeight = (LONG)imgHeight;
		bitmapInfo.bmiHeader.biWidth = (LONG)imgWidth;
		bitmapInfo.bmiHeader.biSizeImage = (LONG)imgWidth * (LONG)imgHeight * 3;
		bitmapInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
		bitmapInfo.bmiHeader.biBitCount = 24;
		bitmapInfo.bmiHeader.biCompression = 0;
		bitmapInfo.bmiHeader.biPlanes = 1;
		outputAvailable = true;        //输出允许
		break;
	case IMAGE_FORMAT_RGB24:
		memcpy(this->data,id->data,id->imgWidth * id->imgHeight * sizeof(unsigned char) * 3); 
		this->imgWidth = id->imgWidth;
		this->imgHeight = id->imgHeight;
		bitmapInfo.bmiHeader.biHeight = (LONG)imgHeight;
		bitmapInfo.bmiHeader.biWidth = (LONG)imgWidth;
		bitmapInfo.bmiHeader.biSizeImage = (LONG)imgWidth * (LONG)imgHeight * 3;
		bitmapInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
		bitmapInfo.bmiHeader.biBitCount = 24;
		bitmapInfo.bmiHeader.biCompression = 0;
		bitmapInfo.bmiHeader.biPlanes = 1;
		this->outputAvailable = true;
		break;
	default:
		this->outputAvailable = false; // 输出禁止
	}
	this->Invalidate(false);
}

						