[SOLVED] Qt 4.7 - 4.8 and bad fonts hinting.

Question

Hi, since the upgrade to qt 4.8, font rendering of qt applications seems very bad to me.
Before the upgrade, firefox and konqueror looked the same, here is now,
I tried in graphicssystem native and raster:
http://ompldr.org/vYnZ2Mw/firefox1.png
http://ompldr.org/vYnZ2NQ/konqueror_native1.png
http://ompldr.org/vYnZ2NA/firefox2.png
http://ompldr.org/vYnZ2Nw/konqueror_raster.png
http://ompldr.org/vYnZ2Ng/konqueror_native2.png
I tried autohinter too, but gtk apps (cairo) seems always better, what happened?
My .fonts.conf:
<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
<match target="font">
<edit mode="assign" name="rgba">
<const>rgb</const>
</edit>
</match>
<match target="font">
<edit mode="assign" name="hinting">
<bool>true</bool>
</edit>
</match>
<match target="font">
<edit name="autohint" mode="assign">
<bool>false</bool>
</edit>
</match>
<match target="font">
<edit mode="assign" name="hintstyle">
<const>hintslight</const>
</edit>
</match>
<match target="font">
<edit mode="assign" name="lcdfilter">
<const>lcddefault</const>
</edit>
</match>
<match target="font">
<test name="family">
<string>Segoe UI</string>
</test>
<edit mode="assign" name="hintstyle">
<const>hintslight</const>
</edit>
</match>
<match target="font">
<edit mode="assign" name="antialias">
<bool>true</bool>
</edit>
</match>
</fontconfig>
Last edited by kokoko3k (2011-12-30 14:16:23)

Answer 1

I casually managed to solve this issue by playing with fontconfig settings.
I'm really not sure if this is the correct way, but now i've the same font rendering i've had before qt 4.8 with hintstyle=hintslight.
My Steps are:
yaourt -S freetype2-infinality
* do not install fontconfig-infinality
edit ~/.fonts.conf as follows
<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
<match target="font">
<edit mode="assign" name="rgba">
<const>rgb</const>
</edit>
</match>
<match target="font">
<edit mode="assign" name="hinting">
<bool>true</bool>
</edit>
</match>
<match target="font">
<edit mode="assign" name="autohint">
<bool>true</bool>
</edit>
</match>
<match target="font">
<edit mode="assign" name="hintstyle">
<const>hintfull</const>
</edit>
</match>
<match target="font">
<edit mode="assign" name="lcdfilter">
<const>lcddefault</const>
</edit>
</match>
<match target="font">
<edit mode="assign" name="antialias">
<bool>true</bool>
</edit>
</match>
</fontconfig>
the trick seems:hinting+autohint+hintfull=hintslight (!?)
edit /etc/profile.d/infinality-settings.sh and add/replace with those values:
SET_XFT_SETTINGS=true
XFT_SETTINGS="
Xft.antialias: 1
Xft.autohint: 1
Xft.dpi: 96
Xft.hinting: 1
Xft.hintstyle: hintslight
Xft.lcdfilter: lcddefault
Xft.rgba: rgb
export INFINALITY_FT_AUTOFIT_FORCE_SLIGHT_HINTING=true
export INFINALITY_FT_FILTER_PARAMS="06 25 44 25 06"
export INFINALITY_FT_GRAYSCALE_FILTER_STRENGTH=0
export INFINALITY_FT_GAMMA_CORRECTION="0 100"
export INFINALITY_FT_BRIGHTNESS="0"
export INFINALITY_FT_CONTRAST="0"
export INFINALITY_FT_AUTOHINT_INCREASE_GLYPH_HEIGHTS=false
export INFINALITY_FT_AUTOHINT_HORIZONTAL_STEM_DARKEN_STRENGTH=0
export INFINALITY_FT_AUTOHINT_VERTICAL_STEM_DARKEN_STRENGTH=0
export INFINALITY_FT_AUTOHINT_SNAP_STEM_HEIGHT=0
export INFINALITY_FT_FRINGE_FILTER_STRENGTH=0
export INFINALITY_FT_WINDOWS_STYLE_SHARPENING_STRENGTH=0
export INFINALITY_FT_CHROMEOS_STYLE_SHARPENING_STRENGTH=0
export INFINALITY_FT_STEM_ALIGNMENT_STRENGTH=0
export INFINALITY_FT_STEM_FITTING_STRENGTH=0
export INFINALITY_FT_STEM_SNAPPING_SLIDING_SCALE=0
export INFINALITY_FT_USE_VARIOUS_TWEAKS=true
export INFINALITY_FT_USE_KNOWN_SETTINGS_ON_SELECTED_FONTS=false
export INFINALITY_FT_GLOBAL_EMBOLDEN_X_VALUE=0
export INFINALITY_FT_GLOBAL_EMBOLDEN_Y_VALUE=0
export INFINALITY_FT_BOLD_EMBOLDEN_X_VALUE=0
export INFINALITY_FT_BOLD_EMBOLDEN_Y_VALUE=0
Now logout/login.
Starting from there, you can further tweak infinality
Ah, openoffice also looks good out of the box, no need to install extra '*uglyfix*' packages
...and chromium still sucks like nothing happened.
-EDIT-
Remember to not change the hintstyle, leave it to hintfull.
Last edited by kokoko3k (2011-12-30 14:19:40)