grfont.c

来自「freetype库的应用demo,里面包含freetype的很多实例」· C语言 代码 · 共 374 行 · 第 1/2 页

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  };


  static
  grBitmap  gr_charcell =
  {
    8,                    /* rows  */
    8,                    /* width */
    1,                    /* pitch */
    gr_pixel_mode_mono,   /* mode  */
    0,                    /* grays */
    0                     /* buffer */
  };

  void  grWriteCellChar( grBitmap*  target,
                         int        x,
                         int        y,
                         int        charcode,
                         grColor    color )
  {
    if (charcode < 0 || charcode > 255)
      return;

    gr_charcell.buffer = (unsigned char*)font_8x8 + 8 * charcode;
    grBlitGlyphToBitmap( target, &gr_charcell, x, y, color );
  }


  void  grWriteCellString( grBitmap*   target,
                           int         x,
                           int         y,
                           const char* string,
                           grColor     color )
  {
    while (*string)
    {
      gr_charcell.buffer = (unsigned char *)font_8x8 +
                             8 * (int)(unsigned char)*string++;
      grBlitGlyphToBitmap( target, &gr_charcell, x, y, color );
      x += 8;
    }
  }

  static int        gr_cursor_x     = 0;
  static int        gr_cursor_y     = 0;
  static grBitmap*  gr_text_bitmap  = 0;
  static int        gr_margin_right = 0;
  static int        gr_margin_top   = 0;


  extern void grGotobitmap( grBitmap*  bitmap )
  {
    gr_text_bitmap = bitmap;
  }


  extern void grSetMargin( int right, int top )
  {
    gr_margin_top   = top << 3;
    gr_margin_right = right << 3;
  }


  extern void grSetPixelMargin( int  right, int  top )
  {
    gr_margin_top   = top;
    gr_margin_right = right;
  }


  extern void grGotoxy ( int x, int y )
  {
    gr_cursor_x = x;
    gr_cursor_y = y;
  }


  extern void grWrite  ( const char*  string )
  {
    if (string)
    {
	  grColor color;

	  color.value = 127;
      grWriteCellString( gr_text_bitmap,
                         gr_margin_right + (gr_cursor_x << 3),
                         gr_margin_top   + (gr_cursor_y << 3),
                         string,
                         color );

      gr_cursor_x += strlen(string);
    }
  }


  extern void grLn( void )
  {
    gr_cursor_y ++;
    gr_cursor_x = 0;
  }


  extern void grWriteln( const char* string )
  {
    grWrite( string );
    grLn();
  }