Re: [Freetype] weird glyph width/heights

[HaB JacKaL]

> From: David Turner <address@hidden>
> Reply-To: address@hidden
> To: address@hidden
> Subject: Re: [Freetype] weird glyph width/heights
> Date: Thu, 02 May 2002 22:29:09 +0200
>
> Hello HaB,

> nope, the bitmap's dimensions are in glyph->bitmap.width and 
> glyph->bitmap.rows
> "glyph->bitmap_left" and "glyph->bitmap_top" correspond to the bitmap's 
> bearings
> and are necessary to correctly place the bitmap relative to the current pen
> position.
>
> The "FreeType Glyph Conventions" has more information on the subject..
>
> Nope, there are a few rules to follow to correctly place the bitmaps within
> a text run.. Have a look at the "ftview" program and see how it renders
> a single line of text (in the "Render_Text" function) for an example..
>
>
> Cheers,
>
> - David Turner
> - The FreeType Project  (www.freetype.org)
>
> _______________________________________________


Well first...where can I find ftview?  I did a search on my system, and I 
don't have it.  Does it come with Freetype?

Also...I am still getting strange values event after shifting right 6 bits.  
Here is the code I'm working with.  My rendering function is omitted to 
conserve space:


static void setup_freetype(void)
{
 // get setup for freetype
 FT_Error ft_error;

 ft_error = FT_Init_FreeType(&fontlib);
 if(ft_error)
   {
     printf("Error initializing FreeType\n");
     exit(1);
   }
 // load the font face
 ft_error = FT_New_Face(fontlib,
                         "../fonts/tunga.ttf",
                         0,
                         &font1);
 if(ft_error)
   {
     printf("Error loading font face\n");
   }

 // setting our character size to 16
 FT_Set_Pixel_Sizes(font1, 0, 16);

}

static void draw_text()
{
 FT_GlyphSlot slot = font1->glyph;  // a small shortcut
 FT_UInt glyph_index;
 FT_Error ft_error;

 int pen_x = 20;
 int pen_y = 20;

 int n;

 int w;
 int h;

 //  static unsigned char text[] = "[Space] pauses the rotation.  [Esc] 
quits.";
 static char text[] = "blah";


 for ( n = 0; n < 4; n++ )
   {
     // load glyph image into the slot (erase previous one)
     ft_error = FT_Load_Char( font1, text[n], FT_LOAD_RENDER );
     if (ft_error) continue;  // ignore errors

     w = (int )&slot->bitmap.width;
     w = w >> 6;
     h = (int )&slot->bitmap.rows;
     h = h >> 6;
     printf("bitmap w = %d, bitmap h = %d\n", w, h);
   }
}


int main(int argc, char *argv[])
{
  .... setup ...
  setup_freetype();
  draw_text();
}

The output I'm getting is this:

bitmap w = 2115978, bitmap h = 2115977


Either those aren't pixel values, I'm doing something horribly wrong, or 
that's some HUGE text.

[:

Any ideas?

I worked thru part 1 of the tutorial.  in fact, that's where a lot of this 
code comes from.  I am blitting to the screen via openGL, and I need the 
size of the bitmap in order to do so.


Thanks!

-HaB












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