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  1. Qt
  2. QTBUG-77506

develop PDF rendering strategy for Qt Quick

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    • Task
    • Resolution: Fixed
    • P1: Critical
    • 6.4.0 FF
    • None
    • PDF, Quick: Other
    • None

    Description

      The plan for now is to make a subclass of QImageIOHandler to expose PDF as an image format: that way an ordinary Image can be used to render a page of a PDF in QML. And Image will get the same currentFrame and frameCount properties that are in AnimatedImage, so that you can use currentFrame to step through the pages or frames of any multi-image format (such as TIFF, ICO, PDF).

      Other features such as selecting ranges of characters, searching etc. can be developed via layers on top. But the most basic thing you can do with a PDF is render a page, and PDFium currently uses the Skia engine to do that, so it's easier to let it render whole-page images than any other rendering strategy. Thus our PDF support will be quite like our SVG support so far in Qt Quick. Later we can think about doing it via QPainter, perhaps, or by creating scene graph nodes for objects (such as glyphs, images and vector graphics) within each page: but the feasibility of that is uncertain so far (see QTBUG-77505).

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          is required for

          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. QTBUG-77503 Prepare for a supported release of QtPDF with more features

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          relates to

          Task - A task that needs to be done. QTBUG-90627 Research a better PixmapCache <-> Image Provider interaction

          • 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-104769 pdfviewer example: Pinch zoom on laptop trackpad stops working if zoom way in

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

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-104767 Using PdfPageImage instead of Image on PDF file results in EXC_BAD_ACCESS (SIGSEGV)

          • 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-114953 PdfMultiPageView: Very poor memory performance when zooming in/out of long documents

          • 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-77506
          # Subject Branch Project Status CR V
          366286,2 WIP Add TiledImage to optimize rendering of large images dev qt/qtdeclarative Status: NEW -2 0

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              srutledg Shawn Rutledge
              srutledg Shawn Rutledge
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                Created:
                Updated:
                Resolved: