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    Where does qt search for font files?

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    • A
      adewang last edited by

      hi,

      i am a newbie to Qt, and i learned that qt will use the qt's /lib/fonts to search for the font files.
      but if configured with -fontconfig, does qt not use the directories added in /etc/fonts/fonts.conf to search the font files?

      Moved to embedded, Gerolf

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      • G
        giesbert last edited by

        AFAIK Qt uses the internal fonts on embedded systems. On Desktop systems, it should use the installed fonts.

        Nokia Certified Qt Specialist.
        Programming Is Like Sex: One mistake and you have to support it for the rest of your life. (Michael Sinz)

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        • A
          adewang last edited by

          Hi Gerolf,

          Thanks for your reply.
          Just to clarify, if i build qt using -embedded option, then the -fontconfig option will not be used, which means that the qt application will only use the font files in the qt's /lib/fonts?
          for example:
          ./configure -xplatform qws/linux-arm-g++ -embedded arm -fontconfig -prefix /path/to/install/ -otheroptions...
          then qt will only search the /path/to/install/lib/fonts directory?

          is there any option that allows qt to use the intalled fonts on embedded systems?

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          • G
            giesbert last edited by

            Hi adewang,

            AFAIK, on embedded, Qt uses the internal window manager which implies it uses the internal font's. I know no possibility to use system font's there, but you can add fonts to the fonts dir of Qt.

            Nokia Certified Qt Specialist.
            Programming Is Like Sex: One mistake and you have to support it for the rest of your life. (Michael Sinz)

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            • C
              casanova last edited by

              hi
              I'm use qt-everywhere-opensource-src-4.8.5 and compile to embedded linux .

              i got questions with fonts. What will qt do if i have many fonts in the font directory?

              I mean is it have search rule and fonts with multi language ?
              Because I put a multi language font to font directory, it didn't show,but when I kill all fonts in the directory beside the multi language font . It shows.

              So, what will I do ? kill all fonts that qt provide ?

              Thanks!!!

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              • C
                casanova last edited by

                hi
                I'm use qt-everywhere-opensource-src-4.8.5 and compile to embedded linux .

                i got questions with fonts. What will qt do if i have many fonts in the font directory?

                I mean is it have search rule and fonts with multi language ?
                Because I put a multi language font to font directory, it didn't show,but when I kill all fonts in the directory beside the multi language font . It shows.

                So, what will I do ? kill all fonts that qt provide ?

                Thanks!!!

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                • K
                  kumararajas last edited by

                  AFAIK, In the embedded platform, Qt looks for the fonts in /usr/lib/fonts directory

                  @
                  root@am335x-evm:/usr/lib/fonts# ls
                  DejaVuSans-Bold.ttf VeraMoBI.ttf fixed_70_50.qpf helvetica_240_75i.qpf
                  DejaVuSans-BoldOblique.ttf VeraMoBd.ttf fontdir helvetica_80_50.qpf
                  DejaVuSans-Oblique.ttf VeraMoIt.ttf helvetica_100_50.qpf helvetica_80_50i.qpf
                  DejaVuSans.ttf VeraMono.ttf helvetica_100_50i.qpf helvetica_80_75.qpf
                  DejaVuSansMono-Bold.ttf VeraSe.ttf helvetica_100_75.qpf helvetica_80_75i.qpf
                  DejaVuSansMono-BoldOblique.ttf VeraSeBd.ttf helvetica_100_75i.qpf japanese_230_50.qpf
                  DejaVuSansMono-Oblique.ttf c0419bt_.pfb helvetica_120_50.qpf l047013t.pfa
                  DejaVuSansMono.ttf c0582bt_.pfb helvetica_120_50i.qpf l047016t.pfa
                  DejaVuSerif-Bold.ttf c0583bt_.pfb helvetica_120_75.qpf l047033t.pfa
                  DejaVuSerif-BoldOblique.ttf c0611bt_.pfb helvetica_120_75i.qpf l047036t.pfa
                  DejaVuSerif-Oblique.ttf c0632bt_.pfb helvetica_140_50.qpf l048013t.pfa
                  DejaVuSerif.ttf c0633bt_.pfb helvetica_140_50i.qpf l048016t.pfa
                  README c0648bt_.pfb helvetica_140_75.qpf l048033t.pfa
                  UTBI____.pfa c0649bt_.pfb helvetica_140_75i.qpf l048036t.pfa
                  UTB_____.pfa cour.pfa helvetica_180_50.qpf l049013t.pfa
                  UTI_____.pfa courb.pfa helvetica_180_50i.qpf l049016t.pfa
                  UTRG____.pfa courbi.pfa helvetica_180_75.qpf l049033t.pfa
                  Vera.ttf couri.pfa helvetica_180_75i.qpf l049036t.pfa
                  VeraBI.ttf cursor.pfa helvetica_240_50.qpf micro_40_50.qpf
                  VeraBd.ttf dejavu_sans_11_50.qpf2 helvetica_240_50i.qpf unifont_160_50.qpf
                  VeraIt.ttf fixed_120_50.qpf helvetica_240_75.qpf wqy-zenhei.ttc
                  root@am335x-evm:/usr/lib/fonts#
                  @

                  And this is by default. You may change the qt-configuration to point to different location.

                  And, for your question on "If you just copy your font to this directory, Qt doesnt display the string the selected language, if you delete the other font files, Qt can display the strings properly" - Are you sure if your platform has enough memory? Because AFAIK, Qt loads the font (Or you load it through application). When loading the font, Qt might use some memory to buffer the character set and the glyphs. (May be). This goes as my wild guess.

                  It will be more interesting to see your system memory details.

                  @
                  root@am335x-evm:/usr/lib/fonts# df -h
                  Filesystem Size Used Available Use% Mounted on
                  /dev/root 3.6G 693.1M 2.7G 20% /
                  devtmpfs 109.1M 4.0K 109.1M 0% /dev
                  tmpfs 16.0M 492.0K 15.5M 3% /var/volatile
                  tmpfs 121.3M 0 121.3M 0% /dev/shm
                  tmpfs 16.0M 0 16.0M 0% /media/ram
                  /dev/mmcblk0p1 69.5M 489.0K 69.0M 1% /var/volatile/run/media/mmcblk0p1

                  @

                  --Kumar

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                  • K
                    kumararajas last edited by

                    AFAIK, In the embedded platform, Qt looks for the fonts in /usr/lib/fonts directory

                    @
                    root@am335x-evm:/usr/lib/fonts# ls
                    DejaVuSans-Bold.ttf VeraMoBI.ttf fixed_70_50.qpf helvetica_240_75i.qpf
                    DejaVuSans-BoldOblique.ttf VeraMoBd.ttf fontdir helvetica_80_50.qpf
                    DejaVuSans-Oblique.ttf VeraMoIt.ttf helvetica_100_50.qpf helvetica_80_50i.qpf
                    DejaVuSans.ttf VeraMono.ttf helvetica_100_50i.qpf helvetica_80_75.qpf
                    DejaVuSansMono-Bold.ttf VeraSe.ttf helvetica_100_75.qpf helvetica_80_75i.qpf
                    DejaVuSansMono-BoldOblique.ttf VeraSeBd.ttf helvetica_100_75i.qpf japanese_230_50.qpf
                    DejaVuSansMono-Oblique.ttf c0419bt_.pfb helvetica_120_50.qpf l047013t.pfa
                    DejaVuSansMono.ttf c0582bt_.pfb helvetica_120_50i.qpf l047016t.pfa
                    DejaVuSerif-Bold.ttf c0583bt_.pfb helvetica_120_75.qpf l047033t.pfa
                    DejaVuSerif-BoldOblique.ttf c0611bt_.pfb helvetica_120_75i.qpf l047036t.pfa
                    DejaVuSerif-Oblique.ttf c0632bt_.pfb helvetica_140_50.qpf l048013t.pfa
                    DejaVuSerif.ttf c0633bt_.pfb helvetica_140_50i.qpf l048016t.pfa
                    README c0648bt_.pfb helvetica_140_75.qpf l048033t.pfa
                    UTBI____.pfa c0649bt_.pfb helvetica_140_75i.qpf l048036t.pfa
                    UTB_____.pfa cour.pfa helvetica_180_50.qpf l049013t.pfa
                    UTI_____.pfa courb.pfa helvetica_180_50i.qpf l049016t.pfa
                    UTRG____.pfa courbi.pfa helvetica_180_75.qpf l049033t.pfa
                    Vera.ttf couri.pfa helvetica_180_75i.qpf l049036t.pfa
                    VeraBI.ttf cursor.pfa helvetica_240_50.qpf micro_40_50.qpf
                    VeraBd.ttf dejavu_sans_11_50.qpf2 helvetica_240_50i.qpf unifont_160_50.qpf
                    VeraIt.ttf fixed_120_50.qpf helvetica_240_75.qpf wqy-zenhei.ttc
                    root@am335x-evm:/usr/lib/fonts#
                    @

                    And this is by default. You may change the qt-configuration to point to different location.

                    And, for your question on "If you just copy your font to this directory, Qt doesnt display the string the selected language, if you delete the other font files, Qt can display the strings properly" - Are you sure if your platform has enough memory? Because AFAIK, Qt loads the font (Or you load it through application). When loading the font, Qt might use some memory to buffer the character set and the glyphs. (May be). This goes as my wild guess.

                    It will be more interesting to see your system memory details.

                    @
                    root@am335x-evm:/usr/lib/fonts# df -h
                    Filesystem Size Used Available Use% Mounted on
                    /dev/root 3.6G 693.1M 2.7G 20% /
                    devtmpfs 109.1M 4.0K 109.1M 0% /dev
                    tmpfs 16.0M 492.0K 15.5M 3% /var/volatile
                    tmpfs 121.3M 0 121.3M 0% /dev/shm
                    tmpfs 16.0M 0 16.0M 0% /media/ram
                    /dev/mmcblk0p1 69.5M 489.0K 69.0M 1% /var/volatile/run/media/mmcblk0p1

                    @

                    --Kumar

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