www.pudn.com > OPENGL-source-code.rar > BitmapView.cpp

// BitmapView.cpp : implementation of the CBitmapView class 
// 
 
#include "stdafx.h" 
#include "Bitmap.h" 
 
#include "BitmapDoc.h" 
#include "BitmapView.h" 
 
//add down 
#include "gl\gl.h" 
#include "gl\glu.h" 
#include "gl\glaux.h" 
//add up 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
//add down字符F位图的相应数据 
GLubyte rasters[24]= 
{ 
	0xc0,0x00,0xc0,0x00,0xc0,0x00,0xc0,0x00, 
	0xc0,0x00,0xff,0x00,0xff,0x00,0xc0,0x00, 
	0xc0,0x00,0xc0,0x00,0xff,0xc0,0xff,0xc0 
}; 
//add up字符F位图的相应数据 
///////////////////////////////////////////////////////////////////////////// 
// CBitmapView 
 
IMPLEMENT_DYNCREATE(CBitmapView, CView) 
 
BEGIN_MESSAGE_MAP(CBitmapView, CView) 
	//{{AFX_MSG_MAP(CBitmapView) 
	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() 
 
///////////////////////////////////////////////////////////////////////////// 
// CBitmapView construction/destruction 
 
CBitmapView::CBitmapView() 
{ 
	//add down 
	m_pDC = NULL; 
	//add up 
} 
 
CBitmapView::~CBitmapView() 
{ 
} 
 
BOOL CBitmapView::PreCreateWindow(CREATESTRUCT& cs) 
{ 
	// TODO: Modify the Window class or styles here by modifying 
	//  the CREATESTRUCT cs 
	//add down 
	cs.style |= WS_CLIPSIBLINGS | WS_CLIPCHILDREN; 
	//add up 
 
	return CView::PreCreateWindow(cs); 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CBitmapView drawing 
 
void CBitmapView::OnDraw(CDC* pDC) 
{ 
	CBitmapDoc* pDoc = GetDocument(); 
	ASSERT_VALID(pDoc); 
	// TODO: add draw code for native data here 
	//add down 
	DrawScene(); 
	//add up 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CBitmapView printing 
 
BOOL CBitmapView::OnPreparePrinting(CPrintInfo* pInfo) 
{ 
	// default preparation 
	return DoPreparePrinting(pInfo); 
} 
 
void CBitmapView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) 
{ 
	// TODO: add extra initialization before printing 
} 
 
void CBitmapView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) 
{ 
	// TODO: add cleanup after printing 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CBitmapView diagnostics 
 
#ifdef _DEBUG 
void CBitmapView::AssertValid() const 
{ 
	CView::AssertValid(); 
} 
 
void CBitmapView::Dump(CDumpContext& dc) const 
{ 
	CView::Dump(dc); 
} 
 
CBitmapDoc* CBitmapView::GetDocument() // non-debug version is inline 
{ 
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CBitmapDoc))); 
	return (CBitmapDoc*)m_pDocument; 
} 
#endif //_DEBUG 
 
///////////////////////////////////////////////////////////////////////////// 
// CBitmapView message handlers 
 
int CBitmapView::OnCreate(LPCREATESTRUCT lpCreateStruct)  
{ 
	if (CView::OnCreate(lpCreateStruct) == -1) 
		return -1; 
	 
	//add down 
	Init(); //初始化OpenGL 
	//add up 
	 
	return 0; 
} 
 
void CBitmapView::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 CBitmapView::OnEraseBkgnd(CDC* pDC)  
{ 
	return TRUE; 
} 
 
void CBitmapView::OnSize(UINT nType, int cx, int cy)  
{ 
	CView::OnSize(nType, cx, cy); 
	 
	GLfloat w=(GLfloat)cx; 
	GLfloat h=(GLfloat)cy; 
	//设置视口与窗口匹配 
	glViewport(0,0,w,h); 
 
	//重新设置坐标系统 
	glMatrixMode(GL_PROJECTION); 
	glLoadIdentity(); 
	 
	//建立正交变换下的剪切体 
	glOrtho(0,w,0,h,-1.0,1.0); 
	 
	glMatrixMode(GL_MODELVIEW); 
	glLoadIdentity(); 
	//add up 
} 
 
//add down 
void CBitmapView::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); 
 
	//根据客户区的初始值定透视投影 
	glClearDepth(1.0f); 
	glEnable(GL_DEPTH_TEST); 
 
	//设置象素存储模式为GL_UNPACK_ALIGNMENT 
	glPixelStorei(GL_UNPACK_ALIGNMENT,1); 
	//将屏幕初始值设为黑色 
	glClearColor(0.0,0.0,0.0,0.0); 
} 
 
BOOL CBitmapView::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 CBitmapView::DrawScene(void) 
{ 
	//设置清屏颜色为黑色 
	glClearColor(0.0f, 0.0f, 0.0f, 0.0f); 
	//清除颜色缓冲区和深度缓冲区 
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); 
 
	//设置图象颜色为白色 
	glColor3f(1.0,1.0,1.0); 
	//设置象素位置 
	glRasterPos2i(20.5,20.5); 
	//绘制图象 
	glBitmap(10,12,0.0,0.0,12.0,0.0,rasters); 
	glBitmap(10,12,0.0,0.0,12.0,0.0,rasters); 
	glBitmap(10,12,0.0,0.0,12.0,0.0,rasters); 
 
	glFinish(); 
	SwapBuffers(wglGetCurrentDC()); 
}