mmxdemoview.cpp

CPU 多媒体指令(MMX、SSE等)应用实例

// MMXDemoView.cpp : implementation of the CMMXDemoView class
//

#include "stdafx.h"
#include "MMXDemo.h"

#include "MMXDemoDoc.h"
#include "MMXDemoView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CMMXDemoView

IMPLEMENT_DYNCREATE(CMMXDemoView, CScrollView)

BEGIN_MESSAGE_MAP(CMMXDemoView, CScrollView)
	//{{AFX_MSG_MAP(CMMXDemoView)
		// 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
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMMXDemoView construction/destruction

CMMXDemoView::CMMXDemoView()
{
	// TODO: add construction code here
	m_pImg = NULL;

	DWORD bitmapInfoSize,i;

	// Bitmap info structure for the image
	bitmapInfoSize = sizeof(BITMAPINFO) + 255*sizeof(RGBQUAD);
	m_pBmiImage = (BITMAPINFO*)new BYTE[bitmapInfoSize];

	m_pBmiImage->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
	m_pBmiImage->bmiHeader.biPlanes = 1;
	m_pBmiImage->bmiHeader.biBitCount = 8;
	m_pBmiImage->bmiHeader.biCompression = BI_RGB;
	m_pBmiImage->bmiHeader.biSizeImage = 0;
	m_pBmiImage->bmiHeader.biXPelsPerMeter = 0;
	m_pBmiImage->bmiHeader.biYPelsPerMeter = 0;
	m_pBmiImage->bmiHeader.biClrUsed = 0;
	m_pBmiImage->bmiHeader.biClrImportant = 0;

	m_pBmiImage->bmiHeader.biWidth = 0;
	m_pBmiImage->bmiHeader.biHeight = 0;

	for (i = 0 ; i < 256 ; i++) {
		m_pBmiImage->bmiColors[i].rgbBlue = (BYTE)i;
		m_pBmiImage->bmiColors[i].rgbGreen = (BYTE)i;
		m_pBmiImage->bmiColors[i].rgbRed = (BYTE)i;
		m_pBmiImage->bmiColors[i].rgbReserved = 0;
	}

}

CMMXDemoView::~CMMXDemoView()
{
}

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

	return CScrollView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMMXDemoView drawing

void CMMXDemoView::OnDraw(CDC* pDC)
{
	CMMXDemoDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	if (m_pImg == NULL)
		return;

	// Set bitmap header info
	m_pBmiImage->bmiHeader.biWidth = pDoc->m_iWidth;
	m_pBmiImage->bmiHeader.biHeight = -pDoc->m_iHeight;

	// Display
	SetDIBitsToDevice(pDC->GetSafeHdc(),
					  0, 0, pDoc->m_iWidth, pDoc->m_iHeight,
					  0, 0, 0, pDoc->m_iHeight,
					  m_pImg, m_pBmiImage, DIB_RGB_COLORS);

	// Display timing
	CString szTime;
	szTime.Format("Time = %.3fms", pDoc->m_el.m_dElapsed*1000);
	pDC->TextOut(10, 10, szTime);
}

void CMMXDemoView::OnInitialUpdate()
{
	CMMXDemoDoc* pDoc = GetDocument();
	CScrollView::OnInitialUpdate();

	CSize sizeTotal;
	// TODO: calculate the total size of this view
	sizeTotal.cx = pDoc->m_iWidth;
	sizeTotal.cy = pDoc->m_iHeight;
	
	// Select the source buffer pointer
	m_pImg = pDoc->m_pImg;

	SetScrollSizes(MM_TEXT, sizeTotal);
}

/////////////////////////////////////////////////////////////////////////////
// CMMXDemoView diagnostics

#ifdef _DEBUG
void CMMXDemoView::AssertValid() const
{
	CScrollView::AssertValid();
}

void CMMXDemoView::Dump(CDumpContext& dc) const
{
	CScrollView::Dump(dc);
}

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

/////////////////////////////////////////////////////////////////////////////
// CMMXDemoView message handlers