[ft] Total width of text

[Leonardo M . Ramé]

Hi, I'm trying to place text over a bitmap using the function below.

If you take a look at the function, there's a "baseline" variable, in
charge of adjusting the top position of the character bitmap. If I don't
do this, all character ar aligned to the top "pen_y" point. I don't know
if this is the recommended way to align text. Please tell me if you know
a better way.

Also, I want to create a box filled in a color between the image and the
text. For example, the image in grayscale, then a red box with black text.

My question is, how can I get the measures (in pixels) of the box
containing all the text, not just each character.

+---------------------+
|                     |
|                 <---------| This is the image in background layer
|                     |
| +-----------------+ |     | I want to know the width
| | This is my text | | <---| and heigth of the box
| +-----------------+ |     | containing the text.
|                     |
+---------------------+

Here's the code I'm using:

  FT_Set_Pixel_Sizes(face, 0, lFontHeight);
  FT_GlyphSlot  slot = face->glyph;
  int pen_x, pen_y, n, baseline, original_y;

  original_y = 0.02 * ARows * (ACols / ARows);
  pen_x = 0.02 * ACols;
  pen_y = original_y;
  int lColor;
  unsigned long lPos;

  for ( n = 0; n < text.length(); n++ )
  {
    /* load glyph image into the slot (erase previous one) */
    error = FT_Load_Char( face, text[n], FT_LOAD_RENDER);
    if ( error )
      continue;  /* ignore errors */

    if(text[n] == '\n')
    {
      pen_x = 0.02 * ACols;
      pen_y += lFontHeight;
      continue;
    }

    baseline = (pen_y - slot->bitmap_top) + (original_y);
    /* now, draw to our target surface */
    for(unsigned long x = 0; x < ACols; x++)
      for(unsigned long y = 0; y < ARows; y++)
      {
         if((x >= 0 && x < slot->bitmap.width) && (y >= 0 && y < 
slot->bitmap.rows))
          {
            lPos = (x + pen_x) + ((y + baseline) * ACols);
            lColor = slot->bitmap.buffer[x + y * slot->bitmap.width];
            if(lColor != 0)
              APixelData[lPos] = 10000;
            else
              APixelData[lPos] = 65535;
          }
          else
          if((x >=0 && x < 400) && (y >= 0 && y < lFontHeight ))
          {
            lPos = (x + pen_x) + ((y + baseline) * ACols);
            if(((y + baseline) <= (pen_y + slot->bitmap.rows)))
              APixelData[lPos] = 5535;
          } 

      } 
    /* increment pen position */
    pen_x += slot->advance.x >> 6;
  }

Thanks in advance,
-- 
Leonardo M. Ramé
Medical IT - Griensu S.A.
Av. Colón 636 - Piso 8 Of. A
X5000EPT -- Córdoba
Tel.: +54(351)4246924 +54(351)4247788 +54(351)4247979 int. 19
Cel.: +54(351)156629292