I've recently noticed that fonts in QT apps compiled with QT4 look chunky compared to those from QT3 apps. Looks like font anti-aliasing doesn't work for them. Reproducible: Always Steps to Reproduce: 1.I've written a simple test program "test.cpp": http://gentryx.de/~gentryx/test.cpp 2.Compile it once with QT3 and once with QT4: g++ -I/usr/qt/3/include/ -L/usr/qt/3/lib64 test.cpp -lqt -o test.qt3 g++ -I/usr/include/qt4/ -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtCore -L/usr/lib64/qt4 test.cpp -lQtGui -lQtCore -o test.qt4 3.Run the programs and compare the label on the button. QT4 isn't aliased, as I've specified it with fontconfig. Actual Results: The result is an unsmoothed font for QT4: http://gentryx.de/~gentryx/test.qt4.png Expected Results: I'd much rather have the smoothed look QT3 gives me: http://gentryx.de/~gentryx/test.qt3.png wintermute ~ # emerge --info Portage 2.1.4.4 (default-linux/amd64/2007.0/desktop, gcc-4.2.3, glibc-2.7-r1, 2.6.24-gentoo-r3 x86_64) ================================================================= System uname: 2.6.24-gentoo-r3 x86_64 AMD Athlon(tm) X2 Dual Core Processor BE-2350 Timestamp of tree: Tue, 18 Mar 2008 12:30:01 +0000 ccache version 2.4 [enabled] app-shells/bash: 3.2_p33 dev-java/java-config: 1.3.7, 2.1.5 dev-lang/python: 2.5.1-r5 dev-util/ccache: 2.4-r7 sys-apps/baselayout: 1.12.11.1 sys-apps/sandbox: 1.2.18.1-r2 sys-devel/autoconf: 2.13, 2.61-r1 sys-devel/automake: 1.5, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10.1 sys-devel/binutils: 2.18-r1 sys-devel/gcc-config: 1.4.0-r4 sys-devel/libtool: 1.5.26 virtual/os-headers: 2.6.24 ACCEPT_KEYWORDS="amd64 ~amd64" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -march=athlon64 -pipe -msse3" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/kde/4.0/env /usr/kde/4.0/share/config /usr/kde/4.0/shutdown /usr/share/config" CONFIG_PROTECT_MASK="/etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/revdep-rebuild /etc/splash /etc/terminfo /etc/texmf/web2c /etc/udev/rules.d" CXXFLAGS="-O2 -march=athlon64 -pipe -msse3" DISTDIR="/usr/portage/distfiles" FEATURES="ccache distlocks metadata-transfer sandbox sfperms strict unmerge-orphans userfetch" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/linux/distributions/gentoo" LANG="de_DE@euro" LC_ALL="de_DE@euro" LINGUAS="de en" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/portage/local/layman/sajinet /usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="3dnow X a52 aalib accessibility acl acpi alsa amd64 arts artswrappersuid bash-completion berkdb cairo ccache cdr cli cracklib crypt cups dbus dri dvd dvdr dvdread eds emacs emboss encode esd ethereal evo exif fam firefox fortran gdbm gif gnome gpm gstreamer gtk hal iconv imap iptc ipv6 isdnlog jpeg kde kerberos ldap libcaca lirc mad midi mikmod mmx mp3 mpeg mudflap musicbrainz nas ncurses nforce2 nls nptl nptlonly nsplugin nvidia ogg opengl openmp oss pam pcre pdf perl png pppd preview-latex python qt3 qt3support qt4 quicktime raw readline reflection samba sasl sdl session slang smtp spell spl sqlite sse sse2 ssl svg tcpd threads tiff truetype unicode usb vorbis xcomposite xml xorg xv xvid zlib" ALSA_CARDS="emu10k1" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" ELIBC="glibc" INPUT_DEVICES="keyboard mouse" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="de en" LIRC_DEVICES="hauppauge" USERLAND="GNU" VIDEO_CARDS="nvidia" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LDFLAGS, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS wintermute ~ # eselect fontconfig list Available fontconfig .conf files ( * is enabled ): [1] 10-autohint.conf * [2] 10-no-sub-pixel.conf [3] 10-sub-pixel-bgr.conf [4] 10-sub-pixel-rgb.conf [5] 10-sub-pixel-vbgr.conf [6] 10-sub-pixel-vrgb.conf [7] 10-unhinted.conf [8] 20-fix-globaladvance.conf * [9] 20-unhint-small-vera.conf * [10] 25-unhint-nonlatin.conf [11] 30-metric-aliases.conf * [12] 30-urw-aliases.conf * [13] 40-nonlatin.conf * [14] 45-latin.conf * [15] 49-sansserif.conf * [16] 50-user.conf * [17] 51-local.conf * [18] 60-latin.conf * [19] 65-fonts-persian.conf * [20] 65-nonlatin.conf * [21] 69-unifont.conf * [22] 70-no-bitmaps.conf [23] 70-yes-bitmaps.conf [24] 80-delicious.conf * [25] 90-synthetic.conf * gentryx@wintermute ~ $ cat .fonts.conf <?xml version="1.0"?><!DOCTYPE fontconfig SYSTEM "fonts.dtd"> <fontconfig> <match target="font" > <edit mode="assign" name="rgba" > <const>none</const> </edit> </match> <match target="font" > <edit mode="assign" name="hinting" > <bool>true</bool> </edit> </match> <match target="font" > <edit mode="assign" name="hintstyle" > <const>hintmedium</const> </edit> </match> <match target="font" > <edit mode="assign" name="antialias" > <bool>true</bool> </edit> </match> </fontconfig>
Created attachment 146569 [details] test program
Created attachment 146570 [details] actual results
Created attachment 146572 [details] expected results
While developing a Qt 4 application I noticed the same: All of my GUI had non-antialiased fonts. But now I just realized that if I configure a different default font in qtconfig, it works just fine. It also works if Qt Widgets explicitely use a different font. I've set it to Arial and I now get antialiased fonts. Most fonts work fine, but "Sans-Serif", which was set before (and probably is a default) and a few other fonts do not antialias. Using Qt 4.3.3 here.
Since upgrading to qt-4.4 I see all fonts are antialiased in qt apps. So fonts.conf(local.conf) really does not work for qt. Perhaps in kde environment it'll be ok, but I use gnome and wanted to use new qgtkstyle engine wrapper.
Sorry for confusion. It was my problem: I only had size filter in local.conf and had to add pixelsize filter as well. Now fonts look same way as in GTK apps.
Looks to me this is a matter of configuring your default fonts correctly, not a bug in Qt.
