Fw: [cairo] Problem with fonts

[Behdad Esfahbod]

I assume your cairo is compiled without FreeType.  Then it's a problem
in the Win32 font backend.  I have no idea about that backend.

behdad

On Mon, 2006-07-24 at 09:47 +0200, Baptiste Gaillard wrote:
> Ok, the result is the same with the Vera font take from 
> C:\Windows\fonts\Vera.ttf. I attach 2 files to this message, the first show 
> the result using AGG, the second using Cairo, the font size is the same. But 
> there is no anti-aliasing with Cairo !!
> 
> Here is the code I used:
> 
> int main(int argc, char** argv) {
>  cairo_surface_t *surface;
>   cairo_t *cr;
> 
>  surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, WIDTH, HEIGHT);
>  cr = cairo_create (surface);
> 
> 
>  cairo_set_source_rgb(cr, 1,1,1);
>  cairo_set_line_width(cr, 1);
>  cairo_set_antialias (cr,CAIRO_ANTIALIAS_GRAY);
> 
>  cairo_font_options_t* font_options =  cairo_font_options_create();
>  cairo_font_options_set_antialias(font_options, CAIRO_ANTIALIAS_GRAY);
>  cairo_set_font_options (cr, font_options);
> 
>  cairo_select_font_face (cr, "Vera.ttf", CAIRO_FONT_SLANT_NORMAL, 
> CAIRO_FONT_WEIGHT_NORMAL);
>  cairo_set_font_size (cr, 16);
> 
>  cairo_glyph_t glyph;
>  glyph.index = 0x24;
> 
>  for(unsigned j = 0; j < 10000; j += 50)
>   for(unsigned i = 0; i < 10000; i += 50) {
>    cairo_move_to (cr, i, j);
>    glyph.x = i;
>    glyph.y = j;
>    cairo_show_glyphs(cr, &glyph, 1);
>   }
> 
> cairo_surface_write_to_png  (surface, "test.png");
> cairo_font_options_destroy(font_options);
> cairo_destroy (cr);
> cairo_surface_destroy (surface);
> 
> return 0;
> }
> 
> Thanks.
> 
> Baptiste
> 
> ----- Original Message ----- 
> From: "Behdad Esfahbod" <behdad at behdad.org>
> To: "Baptiste Gaillard" <b_gaillard at hotmail.com>
> Cc: <cairo at cairographics.org>
> Sent: Friday, July 21, 2006 9:36 PM
> Subject: Re: Fw: [cairo] Problem with fonts
> 
> 
> > On Thu, 2006-07-20 at 06:47 -0400, Baptiste Gaillard wrote:
> >> ----- Original Message ----- 
> >> From: "Baptiste Gaillard" <b_gaillard at hotmail.com>
> >> To: "Behdad Esfahbod" <behdad at behdad.org>
> >> Sent: Thursday, July 20, 2006 9:52 AM
> >> Subject: Re: [cairo] Problem with fonts
> >>
> >>
> >> > Ok, I've seen an exemple here that use a 0.35 font size
> >> > (http://cairographics.org/samples/text.html), so I think it is an 
> >> > error.
> >> > With size like 12-14-16 it works.
> >
> > Ah, not good.  Carl?
> >
> >> > But I've also anti-aliasing problem with the other options, I've tested
> >> > with
> >> > CAIRO_ANTIALIAS_GRAY and CAIRO_ANTIALIAS_SUBPIXEL but anti-aliased 
> >> > seems
> >> > again to be off. See the 2 files attached to this message, the first is 
> >> > a
> >> > symbol rendere with CAIRO_ANTIALIAS_GRAY, the second is rendered with
> >> > CAIRO_ANTIALIAS_SUBPIXEL (is it normal that the contours are green ?).
> >
> > The green is kinda expected.  If it doesn't look good on your LCD, you
> > may have a different RGB order, or a poor FreeType version.
> >
> > As for GRAY not working, is it the case that you are using a bitmap
> > font?  Can you please try with a widely known font like Bitstream Vera
> > and report the results of that?
> >
> > behdad
> >
> >> >
> >> > Thanks.
> >> >
> >> > Baptiste.
> >> >
> >> _______________________________________________
> >> cairo mailing list
> >> cairo at cairographics.org
> >> http://cairographics.org/cgi-bin/mailman/listinfo/cairo
> > -- 
> > behdad
> > http://behdad.org/
> >
> > "Commandment Three says Do Not Kill, Amendment Two says Blood Will Spill"
> >        -- Dan Bern, "New American Language"
> >
> > 
-- 
behdad
http://behdad.org/

"Commandment Three says Do Not Kill, Amendment Two says Blood Will Spill"
        -- Dan Bern, "New American Language"