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  1. Qt
  2. QTBUG-18980

Use harfbuzz-ng for text layout

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Details

    • Task
    • Resolution: Done
    • P3: Somewhat important
    • 5.4.0
    • None
    • GUI: Text handling
    • None
    • c72eb0372b998472316def1df1bce29305f5500a

    Description

      underlined textSince the original harfbuzz [1] is more or less in maintenance mode, it will be interesting to explore the possibility of using harfbuzz-ng [2] as the text layout engine of Qt, finding out what's missing in current harfbuzz-ng to fulfill the needs of Qt is especially important.

      [1] http://cgit.freedesktop.org/harfbuzz/
      [2] http://cgit.freedesktop.org/harfbuzz.old/

      Attachments

        1. 148.png
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        2. hb-ng.html
          0.7 kB
        3. hb-ng.png
          hb-ng.png
          76 kB

        Issue Links

          depends on

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-29930 Unicode script itemization code needs to be re-worked

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-38246 Mac: Enable HarfbuzzNG by default

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Task - A task that needs to be done. QTBUG-5472 Update Unicode Database to 7.0

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Task - A task that needs to be done. QTBUG-33764 Unicode BiDi itemization code needs to be updated / re-worked

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed
          is required for

          Sub-task - The sub-task of the issue QTBUG-14590 Myanmar Unicode fonts do not display correctly in Qt Apps

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-22585 path.addText introduces gaps between the should-be connected Arabic characters

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-36056 REG: Indic Text Rendering Error (Sinhala Language)

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-16128 Harfuzz does not combine some glyphs for Malayalam text correctly

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-29629 Arabic text is broken badly with some fonts

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-29787 Falsely rendering Mongolian OpenType text

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-31978 Tibetan text does not display properly on Mac OS X

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-11747 Shavian text and other 4-byte utf8 fonts corrupts on display after several characters.

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed

          Suggestion - Public suggestions QTBUG-529 Add support for vertical text writing

          • P4: Low - Would be nice to fix, but it's not very important.
          • Open

          Suggestion - Public suggestions QTBUG-13750 Add graphite smart font support

          • P4: Low - Would be nice to fix, but it's not very important.
          • Open
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-36066 Qt5 apps cannot display japanese characters properly when compiled with HarfBuzz-NG

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-31978 Tibetan text does not display properly on Mac OS X

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-36352 Dotted Circle does not appear in Indic Script for separate/independent vowels.

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          replaces

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-40051 Default configuration disables harfbuzz support

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          resulted from

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-41931 [REG 5.3.2 -> 5.4] Kerning broken, spaces between letters too big

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          For Gerrit Dashboard: QTBUG-18980
          # Subject Branch Project Status CR V
          78022,18 Make HarfBuzz-NG the default shaper on all platforms 5.4 qt/qtbase Status: MERGED +2 0
          83189,2 Make HarfBuzz-NG the default shaper on Mac release qt/qtbase Status: MERGED +2 0
          92466,1 Make HarfBuzz-NG the default shaper on all platforms 5.3 qt/qtbase Status: ABANDONED 0 0

          Activity

            People

              ritt.ks Konstantin Ritt
              jiang Jiang Jiang
              Votes:
              11 Vote for this issue
              Watchers:
              24 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Gerrit Reviews

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