BitmapFont.cpp

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#include "BitmapFont.h"

BitmapFont::BitmapFont( HDC h ) {
  this->hDC = h;
  this->m_size = 24;
}

BitmapFont::~BitmapFont() {
  killFont();
}

GLvoid BitmapFont::buildFont( GLvoid ) {
  HFONT font; // Windows font-id
  HFONT oldfont;

  base = glGenLists( 96 ); // create storage space for 96 characters

  font = CreateFont( -1*m_size, // height of the font
    0, // width
    0, // escapement angle
    0, // orientation angle
    0, // weight
    FALSE, // italic
    FALSE, // underline
    FALSE, // strikeout
    ANSI_CHARSET, // charset encoding
    OUT_TT_PRECIS, // output precision
    CLIP_DEFAULT_PRECIS, // clipping precision
    ANTIALIASED_QUALITY, // anti aliasing
    FF_DONTCARE | DEFAULT_PITCH, // family, pith
    "Arial Narrow"); // the actual font

  oldfont = (HFONT)SelectObject( hDC, font );
  wglUseFontBitmaps( hDC, 32, 96, base );           // builds 96 characters starting at character 32 (space)
  SelectObject( hDC, oldfont );
  DeleteObject( font );
}

GLvoid BitmapFont::buildFont( GLuint size ) {
  m_size = size;
  this->buildFont();
}

GLvoid BitmapFont::killFont( GLvoid ) {
  glDeleteLists( base, 96 );                // delete all 96 characters
}

GLvoid BitmapFont::print(const char *fmt, ...) {
  char text[256];
  va_list ap;

  if (fmt == NULL)
    return;

  va_start(ap, fmt); // parse string for variables
  vsprintf_s(text, fmt, ap); // convert symbols to numbers
  va_end(ap); // store result

  glPushAttrib( GL_LIST_BIT ); // push the display list bits (we use them now)
  glListBase(base - 32); // reset the base as we start only with char 32

  glCallLists((int)strlen(text), GL_UNSIGNED_BYTE, text); // draw string using display list
  glPopAttrib(); // restore
}