https://bugs.freedesktop.org/show_bug.cgi?id=79875

          Priority: medium
            Bug ID: 79875
          Assignee: libreoffice-bugs@lists.freedesktop.org
           Summary: UI: Line chart rendering changes when there are more
                    than 1000 points
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: bugzilla.freedesk...@jelmail.com
          Hardware: Other
        Whiteboard: BSA
            Status: UNCONFIRMED
           Version: 4.2.2.1 release
         Component: Spreadsheet
           Product: LibreOffice

Created attachment 100798
  --> https://bugs.freedesktop.org/attachment.cgi?id=100798&action=edit
example spreadsheet and chart

A line chart renders differently when there are more than 1000 points. At each
point the line appears to thin out and while the line between points appears
thicker. With 1000 or fewer points the line thickness is uniform throughout.

Steps to reproduce:
1. Open the attached file "line-chart.ods"
2. See that the rendered chart looks like attached file "1000-points.png"
3. Right-click the chart, select "Edit"
4. Right-click the chart again, select "Data Ranges"
5. Change the range from "$Sheet1.$A$1:$B$1001" to "$Sheet1.$A$1:$B$1002" (i.e.
just change the rightmost character from 1 to 2). Press OK.
6. See that the rendered chart now looks like attached file "1001-points.png"

Current behavior: the way the line is drawn changes

Expected behavior: the way the line is drawn should stay the same


Operating System: Linux (Other)
Version: 4.2.2.1 release

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