[Freetype] Getting black bitmaps - why?

[Paul Miller]

This is very frustrating. I've pretty much duplicated most of what the ftgl 
library does to make texture-based glyphs, but all I get is black bitmaps 
for the characters. Here is basically what I'm doing (after opening the face):

   long point_size = 72;
   long resolution = 72;
   ::FT_Set_Char_Size( _face, 0L, point_size * 64, resolution, resolution );

   // code is a unicode character - the letters "A" through "Z" for my test
   FT_UInt glyph_index = ::FT_Get_Char_Index( _face, code );
   FT_Error error = ::FT_Load_Glyph( _face, glyph_index, FT_LOAD_NO_HINTING );

   FT_Glyph glyph;
   error = ::FT_Get_Glyph( _face->glyph, &glyph );

   error = ::FT_Glyph_To_Bitmap( &glyph, ft_render_mode_normal, 0, 1 );
   if ( error != 0 || glyph->format != ft_glyph_format_bitmap )
      return;   /// +++ ERROR +++

   FT_BitmapGlyph bmg = (FT_BitmapGlyph)glyph;
   const FT_Bitmap *src = &bmg->bitmap;

   // copy the bitmap over
   for ( int y = 0; y < src->rows; y++ ) {
      const unsigned char *src_buf = ( src->buffer + ( y * src->pitch ) );
      unsigned char *dest = dest_image.getRow( x_offset, y_offset + y );
      ::memcpy( dest, src_buf, src->width );
   }
   ::FT_Done_Glyph( glyph );

None of these functions returns an error, and the "black box" that is 
filled looks like it has the correct size, but there is no glyph in there.

Any ideas?

Am I missing some magical "FT_PLEASE_RENDER_I_MEAN_IT" flag?


--
Paul T. Miller  | VP of Engineering, Profound Effects, Inc. | 
http://www.profoundeffects.com