[cairo] RBG subpixel rendering on a SDL surface?

[yuuki]

Hi, I'm trying to use Cairo to draw on a SDL surface (i.e. an image
surfaces).
Following this page (https://www.cairographics.org/SDL/), drawing
works fine but I can't get subpixel rendering working for fonts.

From the doc it seems the only thing to do is to set a
cairo_font_options_t
with the correct options to the context, but that doesn't seem to work.
I can get
grayscale antialiasing but never RGB.

I've seen that surfaces also have a cairo_font_options_t but that this
one cannot
be changed. So my questions are:

- Is it supposed to work or not ?
- What factors determines how fonts get drawn (context, surface, other
things... ) ?
- Is there a way to get RBG subpixel rendering working with SDL ?


Thanks!

[yuuki]

Post by yuuki
Hi, I'm trying to use Cairo to draw on a SDL surface (i.e. an image
surfaces).
Following this page (https://www.cairographics.org/SDL/), drawing
works fine but I can't get subpixel rendering working for fonts.
From the doc it seems the only thing to do is to set a
cairo_font_options_t
with the correct options to the context, but that doesn't seem to
work. I can get
grayscale antialiasing but never RGB.
I've seen that surfaces also have a cairo_font_options_t but that this
one cannot
- Is it supposed to work or not ?
- What factors determines how fonts get drawn (context, surface, other
things... ) ?
- Is there a way to get RBG subpixel rendering working with SDL ?
Thanks!

To answer my own question, I managed to change the font_options of the
surface,
but that doesn't make a difference, so I think it's just not possible to
get
subpixel rendering to work on a SDL surface.