[cairo] PDF: Font size is rounded

Adrian Johnson ajohnson at redneon.com
Sat Jun 18 12:05:59 UTC 2016

I found a problem with my previous patch when testing. I have rewritten
the patch, created a test case, and tested it with the test suite. The
attached patch is the fix I will push out if there are no objections.

A branch including the test case and ref images is at:


On 16/04/16 22:36, Kouhei Sutou wrote:
> Hi,
> In <56FF4093.5090907 at redneon.com>
>   "Re: [cairo] PDF: Font size is rounded" on Sat, 2 Apr 2016 14:16:27 +1030,
>   Adrian Johnson <ajohnson at redneon.com> wrote:
>> I put some printfs in _cairo_ft_scaled_glyph_init (in cairo-ft-font.c).
>> It appears that FreeType is returning hinted metrics. I'm guessing that
>> to get unhinted metrics of TrueType fonts we need to set the scale to
>> the EM size like we do for win32 fonts.
>> I'm attaching a patch to do this. It fixes your test case. I don't know
>> if this patch is the correct way to fix the problem. I am not familiar
>> with the FreeType font backend.
> Could someone who know about the FreeType font backend
> review the patch and commit the patch to the cairo
> repository? I confirmed that the patch fixes the problem I
> reported. I want the next cairo release to include this
> patch.
> Thanks,
> --
> kou

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