strokeview.cpp

C:Documents and SettingsAdministrator桌面VC++多媒体特效制作百例CHAR10Stroke

// StrokeView.cpp : implementation of the CStrokeView class
//

#include "stdafx.h"
#include "Stroke.h"

#include "StrokeDoc.h"
#include "StrokeView.h"

//add down
#include <stdlib.h>
#include <string.h>

#define PT 1
#define STROKE 2
#define END 3

CP Adata[] = {
   { 0, 0, PT}, {0, 9, PT}, {1, 10, PT}, {4, 10, PT}, 
   {5, 9, PT}, {5, 0, STROKE}, {0, 5, PT}, {5, 5, END}
};

CP Edata[] = {
   {5, 0, PT}, {0, 0, PT}, {0, 10, PT}, {5, 10, STROKE},
   {0, 5, PT}, {4, 5, END}
};

CP Pdata[] = {
   {0, 0, PT}, {0, 10, PT},  {4, 10, PT}, {5, 9, PT}, {5, 6, PT}, 
   {4, 5, PT}, {0, 5, END}
};

CP Rdata[] = {
   {0, 0, PT}, {0, 10, PT},  {4, 10, PT}, {5, 9, PT}, {5, 6, PT}, 
   {4, 5, PT}, {0, 5, STROKE}, {3, 5, PT}, {5, 0, END}
};

CP Sdata[] = {
   {0, 1, PT}, {1, 0, PT}, {4, 0, PT}, {5, 1, PT}, {5, 4, PT}, 
   {4, 5, PT}, {1, 5, PT}, {0, 6, PT}, {0, 9, PT}, {1, 10, PT}, 
   {4, 10, PT}, {5, 9, END}
};
//add up

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

/////////////////////////////////////////////////////////////////////////////
// CStrokeView

IMPLEMENT_DYNCREATE(CStrokeView, CView)

BEGIN_MESSAGE_MAP(CStrokeView, CView)
	//{{AFX_MSG_MAP(CStrokeView)
	ON_WM_CREATE()
	ON_WM_DESTROY()
	ON_WM_ERASEBKGND()
	ON_WM_SIZE()
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CStrokeView construction/destruction

CStrokeView::CStrokeView()
{
	//add down
	m_pDC = NULL;

	test1 = "A SPARE SERAPE APPEARS AS";
	test2 = "APES PREPARE RARE PEPPERS";

	//add up

}

CStrokeView::~CStrokeView()
{
}

BOOL CStrokeView::PreCreateWindow(CREATESTRUCT& cs)
{
	//add down
	cs.style |= WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
	//add up

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CStrokeView drawing

void CStrokeView::OnDraw(CDC* pDC)
{
	CStrokeDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	//add down
	DrawScene();
	//add up
}

/////////////////////////////////////////////////////////////////////////////
// CStrokeView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CStrokeView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CStrokeView message handlers

int CStrokeView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CView::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	//add down
	Init(); //初始化OpenGL
	//add up
	
	return 0;
}

void CStrokeView::OnDestroy() 
{
	//add down
	HGLRC   hrc;

	hrc = ::wglGetCurrentContext();

	::wglMakeCurrent(NULL,  NULL);

	if (hrc)
		::wglDeleteContext(hrc);

	if (m_pDC)
		delete m_pDC;
	//add up

	CView::OnDestroy();
}

BOOL CStrokeView::OnEraseBkgnd(CDC* pDC) 
{
	return TRUE;
}

void CStrokeView::OnSize(UINT nType, int cx, int cy) 
{
	CView::OnSize(nType, cx, cy);
	
   glViewport(0, 0, (GLsizei) cx, (GLsizei) cy);
   glMatrixMode (GL_PROJECTION);
   glLoadIdentity ();
   gluOrtho2D (0.0, (GLdouble) cx, 0.0, (GLdouble) cy);
	
}

//add down
void CStrokeView::Init()
{
	PIXELFORMATDESCRIPTOR pfd;
	int         n;
	HGLRC       hrc;

	m_pDC = new CClientDC(this);

	ASSERT(m_pDC != NULL);

	if (!bSetupPixelFormat())
		return;

	n = ::GetPixelFormat(m_pDC->GetSafeHdc());
	::DescribePixelFormat(m_pDC->GetSafeHdc(), n, sizeof(pfd), &pfd);

	hrc = wglCreateContext(m_pDC->GetSafeHdc());
	wglMakeCurrent(m_pDC->GetSafeHdc(), hrc);

	/*  Create a display list for each of 6 characters	*/
	GLuint base;

   glShadeModel (GL_FLAT);

   base = glGenLists (128);
   glListBase(base);
   glNewList(base+'A', GL_COMPILE); drawLetter(Adata); glEndList();
   glNewList(base+'E', GL_COMPILE); drawLetter(Edata); glEndList();
   glNewList(base+'P', GL_COMPILE); drawLetter(Pdata); glEndList();
   glNewList(base+'R', GL_COMPILE); drawLetter(Rdata); glEndList();
   glNewList(base+'S', GL_COMPILE); drawLetter(Sdata); glEndList();
   glNewList(base+' ', GL_COMPILE); glTranslatef(8.0, 0.0, 0.0); glEndList();

}

BOOL CStrokeView::bSetupPixelFormat()
{
	static PIXELFORMATDESCRIPTOR pfd =
	{
		sizeof(PIXELFORMATDESCRIPTOR),  // size of this pfd
		1,                              // version number
		PFD_DRAW_TO_WINDOW |            // support window
		  PFD_SUPPORT_OPENGL |          // support OpenGL
		  PFD_DOUBLEBUFFER,             // double buffered
		PFD_TYPE_RGBA,                  // RGBA type
		24,                             // 24-bit color depth
		0, 0, 0, 0, 0, 0,               // color bits ignored
		0,                              // no alpha buffer
		0,                              // shift bit ignored
		0,                              // no accumulation buffer
		0, 0, 0, 0,                     // accum bits ignored
		32,                             // 32-bit z-buffer
		0,                              // no stencil buffer
		0,                              // no auxiliary buffer
		PFD_MAIN_PLANE,                 // main layer
		0,                              // reserved
		0, 0, 0                         // layer masks ignored
	};
	int pixelformat;

	if ( (pixelformat = ChoosePixelFormat(m_pDC->GetSafeHdc(), &pfd)) == 0 )
	{
		MessageBox("ChoosePixelFormat failed");
		return FALSE;
	}

	if (SetPixelFormat(m_pDC->GetSafeHdc(), pixelformat, &pfd) == FALSE)
	{
		MessageBox("SetPixelFormat failed");
		return FALSE;
	}

	return TRUE;
}

void CStrokeView::DrawScene(void)
{
   glClear(GL_COLOR_BUFFER_BIT);
   glColor3f(1.0, 1.0, 1.0);
   glPushMatrix();
   glScalef(2.0, 2.0, 2.0);
   glTranslatef(10.0, 30.0, 0.0);
   printStrokedString(test1);
   glPopMatrix();
   glPushMatrix();
   glScalef(2.0, 2.0, 2.0);
   glTranslatef(10.0, 13.0, 0.0);
   printStrokedString(test2);
   glPopMatrix();

	glFinish();
	SwapBuffers(wglGetCurrentDC());
}

/*  drawLetter() interprets the instructions from the array
 *  for that letter and renders the letter with line segments.
 */
void CALLBACK CStrokeView::drawLetter(CP *l)
{
   glBegin(GL_LINE_STRIP);
   while (1) {
      switch (l->type) {
         case PT:
            glVertex2fv(&l->x);
            break;
         case STROKE:
            glVertex2fv(&l->x);
            glEnd();
            glBegin(GL_LINE_STRIP);
            break;
         case END:
            glVertex2fv(&l->x);
            glEnd();
            glTranslatef(8.0, 0.0, 0.0);
            return;
      }
      l++;
   }
}

void CALLBACK CStrokeView::printStrokedString(char *s)
{
   GLsizei len = strlen(s);
   glCallLists(len, GL_BYTE, (GLbyte *)s);
}

//add up