opengl字体

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英文字体显示：

void GLfont::BuildFontGL(GLvoid)            // 建立位图字体（Bitmap Fonts）
{
HFONT newFont;             // 用以保存新的字体对象
HFONT oldFont;             // 用以保存原字体对象
base = glGenLists(256);            // 存储256个字符

newFont =::CreateFont(-18,          // 字体的高度
  0,           // 字体的宽度
  0,           // 旋转的角度
  0,           // 定位角度
  FW_THIN,         // 字体的粗细
  FALSE,          // 斜体?
  FALSE,          // 下划线?
  FALSE,          // 删除线?
  ANSI_CHARSET,        // 字符集
  OUT_TT_PRECIS,        // 输出精度
  CLIP_DEFAULT_PRECIS,      // 裁减精度
  ANTIALIASED_QUALITY,      // 输出质量
  FF_DONTCARE|DEFAULT_PITCH,     // 间距和字体族
  "Tahoma");         // 字体名称

oldFont = (HFONT)SelectObject(::GetDC(NULL), newFont);    // 选进设备描述表
wglUseFontBitmaps(::GetDC(NULL), 0, 256, base);     // 建立256个字符
SelectObject(::GetDC(NULL), oldFont);        // 恢复设备描述表
DeleteObject(newFont);            // 删除新字体
}

GLvoid GLfont::KillFontGL(GLvoid) // 删除保存字体的显示表
{
glDeleteLists(base, 256); // 删除256个字符
}

GLvoid GLfont::glPrint(const char *fmt, ...)         // 建立Print函数
{
char  text[256];            // 用以保存格式化后的字符串
va_list  ap;              // 指向参数列表的指针

if (fmt == NULL)             // 没有可输出的字符？
  return;               // 返回
va_start(ap, fmt);             // 遍历字符串，查找变量
vsprintf(text, fmt, ap);          // 将变量转换为显示的数字
va_end(ap);               // 结果保存在text内
glPushAttrib(GL_LIST_BIT);           // 显示表状态入栈
glListBase(base);             // 显示表偏移量
glCallLists((int)strlen(text), GL_UNSIGNED_BYTE, text);    // 绘制字符串
glPopAttrib();              // 显示表状态出栈
}

使用：

GLfont font;
font.BuildFontGL();
glRasterPos2f(1.0,0.0);
glColor3f(1,0,0);
font.glPrint("懒猪");

中文字体显示：

void GLfont::CreateFont(char *facename, int height, int weight, bool italic,bool underline,bool strikeout)
{
LOGFONT lf;

lf.lfHeight = height;
lf.lfWidth = 0;
lf.lfEscapement = 0;
lf.lfOrientation = 0;
lf.lfWeight = weight;
lf.lfItalic = italic;
lf.lfUnderline = underline;
lf.lfStrikeOut = strikeout;
lf.lfCharSet = DEFAULT_CHARSET;
lf.lfOutPrecision = OUT_TT_PRECIS;
lf.lfClipPrecision = CLIP_DEFAULT_PRECIS;
lf.lfQuality = PROOF_QUALITY;
lf.lfPitchAndFamily = VARIABLE_PITCH | TMPF_TRUETYPE | FF_MODERN;
strcpy(lf.lfFaceName,facename);

// 创建字体
m_hFont = CreateFontIndirect(&lf);

}
void GLfont::ShowText(int x, int y, LPCTSTR lpszText)
{
// 保存原投影矩阵，将投影矩阵设为平行投影
glMatrixMode( GL_PROJECTION );
glPushMatrix();
glLoadIdentity();
glOrtho( 0, 640, 0, 480, -1, 1 );

// 保存原模型变换矩阵，平移至( x, y )
glMatrixMode( GL_MODELVIEW );
glPushMatrix();
glLoadIdentity();
RECT rect;
GetClientRect(GetActiveWindow(),&rect);
glTranslatef(x, float(rect.bottom-rect.top-35-y), 0 );

HBITMAP hbitmap;
BITMAP bm;
SIZE size;
UCHAR* pBmpBits;
HFONT hOldFont;
HDC hdc = wglGetCurrentDC();

hOldFont = (HFONT)SelectObject(hdc, m_hFont);
::GetTextExtentPoint32(hdc, lpszText, strlen(lpszText), &size);
hbitmap = CreateBitmap(size.cx, size.cy,1, 1, NULL);

HDC hMemDC = ::CreateCompatibleDC(hdc);
if(hMemDC)
{
  HBITMAP hPrevBmp = (HBITMAP)SelectObject(hMemDC,hbitmap);
  HFONT hPrevFont = (HFONT)SelectObject(hMemDC, m_hFont);

  SetBkColor(hMemDC, RGB(0, 0, 0));
  SetTextColor(hMemDC, RGB(255, 0, 0));
  SetBkMode(hMemDC, OPAQUE);
  TextOut(hMemDC, 0, 0, lpszText, strlen(lpszText));

  // copy GDI bitmap to DIB
  SelectObject(hdc,hbitmap);
  GetObject(hbitmap, sizeof(bm), &bm);
  size.cx = (bm.bmWidth + 31) & (~31);
  size.cy = bm.bmHeight;
  int bufsize = size.cy * (((bm.bmWidth + 31) & (~31)) /8);
  pBmpBits = new UCHAR[bufsize];
  memset(pBmpBits, 0, sizeof(UCHAR)*bufsize);

  struct {
   BITMAPINFOHEADER bih;
   RGBQUAD col[2];
  }bic;
  BITMAPINFO *binf = (BITMAPINFO *)&bic;

  binf->bmiHeader.biSize = sizeof(binf->bmiHeader);
  binf->bmiHeader.biWidth = bm.bmWidth;
  binf->bmiHeader.biHeight = bm.bmHeight;
  binf->bmiHeader.biPlanes = 1;
  binf->bmiHeader.biBitCount = 1;
  binf->bmiHeader.biCompression = BI_RGB;
  binf->bmiHeader.biSizeImage = bufsize;
  binf->bmiHeader.biXPelsPerMeter = 1;
  binf->bmiHeader.biYPelsPerMeter = 1;
  binf->bmiHeader.biClrUsed = 0;
  binf->bmiHeader.biClrImportant = 0;

  ::GetDIBits(hdc, hbitmap, 0, bm.bmHeight, pBmpBits, binf,DIB_RGB_COLORS);

  SelectObject(hMemDC, hPrevBmp);
}
::DeleteDC(hMemDC);

// delete font from DC
SelectObject(hdc, hOldFont);
// display text
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glRasterPos2i(1,20);
glBitmap(size.cx, size.cy, 0.0, 2.0, size.cx+2.0f, 0.0, pBmpBits);
delete pBmpBits;
// 恢复投影矩阵和模型变换矩阵
glMatrixMode( GL_PROJECTION );
glPopMatrix();
glMatrixMode( GL_MODELVIEW );
glPopMatrix();
}

初学，网上书上看的，留下来供大家参考。