[cairo-bugs] [Bug 38375] New: cairo_scale and (freetype) fonts only scales glyphs badly, layout even worse

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=38375

           Summary: cairo_scale and (freetype) fonts only scales glyphs
                    badly, layout even worse
           Product: cairo
           Version: 1.10.2
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: freetype font backend
        AssignedTo: david at freetype.org
        ReportedBy: o.gorter at activevideo.com
         QAContact: cairo-bugs at cairographics.org


Created an attachment (id=48054)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=48054)
example1

rendering fonts (especially at normal 10-18px sizes) appear very bad when
scaled, like when doing cairo_scale(cairo, 0.5, 1.0)

The problem seems to be the glyphs are individually scaled, and then laid out
as (almost) normal. The result is much worse compared to rendering the text
normal and then scaling it back.

see attachments how more pixels are inserted when rendering scaled

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