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  1. Qt
  2. QTBUG-32997

Glyph Nodes use preprocess to prepare glyphs even though they do not need changes

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    Details

    • Type: Suggestion
    • Status: Reported
    • Priority: P2: Important
    • Resolution: Unresolved
    • Affects Version/s: 5.1.0
    • Fix Version/s: None
    • Component/s: Quick: SceneGraph
    • Labels:
      None

      Description

      For a large amount of glyph nodes, the time the renderer needs to spend in preprocessing nodes for no good reason is quite large. In the case of http://qt.gitorious.org/qtplayground/scenegraph/trees/master/benchmarks/extremetable We're spending up to 4ms in preprocess (measured using QSG_RENDER_TIMING=1).

      An alternative approach to preparing the glyphs should be taken. For instance, one manager object could be connected to QQuickWindow::beforeRendering() and it could prepare all "registered" glyphs at this time. That would greatly improve performance for text-heavy apps.

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            • Assignee:
              qt.team.graphics.and.multimedia Qt Graphics and Multimedia Team
              Reporter:
              sletta Gunnar Sletta
            • Votes:
              5 Vote for this issue
              Watchers:
              8 Start watching this issue

              Dates

              • Created:
                Updated:

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