Thank you very much.

This solves my problem.

Davide Rizzo

Il 12/01/23 02:53, Alexei Podtelezhnikov ha scritto:
Hi Davide,

Thank you. I don't know how much you know about hinting vs rendering.
You seem to be confused about FT_LOAD flags.

FT_Load_Char(face, 'e', FT_LOAD_DEFAULT | FT_LOAD_TARGET_LIGHT | 
FT_LOAD_MONOCHROME | FT_LOAD_NO_BITMAP);
FT_LOAD_DEFAULT is just 0 and is meaningless in the OR-chain.
FT_LOAD_NO_BITMAP mean no embedded bitmaps, which Arial does not have,
if I am not mistaken
FT_LOAD_MONOCHROME is a selector of rendering algorithm, but you
postpone it until later. It has no effect
FT_LOAD_TARGET_LIGHTis the only flag that does a lot here: it enables
autohinting but only vertically, bytecode is disabled.

As a result you might indeed use wrong hinting (or without horizontal
hinting) for a mono rendering. Please try FT_LOAD_TARGET_MONO as our
documentation clearly suggests for monochrome rendering. See
https://freetype.org/freetype2/docs/reference/ft2-base_interface.html#ft_load_xxx.

FT_Render_Glyph(face->glyph, FT_RENDER_MODE_MONO);
You might argue that it used to work. I really do not know how. Again,
you should get an Ok output with just FT_LOAD_TARGET_MONO do not make
it more complicated than that.

Alexei

On Wed, Jan 11, 2023 at 3:29 AM Davide Rizzo <davide.ri...@eidos.eu> wrote:
Hi,

You're right.

I wrote a very simple test program to evidence the difference in the output.

I attach the program, the font we use (a standard arial.ttf) and the
different outputs I obtain at size 58.

With freetype up to 2.10.2 I obtain the desired nice bitmap, with
freetype since 2.10.3 (including the last 2.12.1) I obtain a different
bitmap.

My question is if it's possible with some parameter to obtain the "old"
bitmap with freetype 2.12.1.

Thank you

Davide Rizzo


Il 10/01/23 00:03, Alexei Podtelezhnikov ha scritto:
Davide,

The new output is much worse, most of chars have single dots protruding
in the external outline.

We won't be able to help you unless you help us to reproduce or see
the issue. At the very least you should name the font and the size,
and give a screenshot.  Also, in our mind, only bugs in 2.12.1 are
worth fixing. You should try this most recent version in case it is
fixed already. There could be other software that disabled the hinting
too. Therefore, we prefer that you show the issue using freetype demos
like ftview or ftgrid.

Does this make sense? Your report does not have any details. You can
use https://gitlab.freedesktop.org/freetype/freetype/-/issues once you
have mode details.

Can you help us to help you?

Alexei



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