Created attachment 146353 [details]
Example file from Excel with a gradient background cell.

The background gradient of cells is incorrectly imported in XLSX spreadsheet created with Microsoft Excel 2010, when we use the Fill Effects option.
Currently it’s not possible to set a gradient background in Calc, only solid color is offered.


Steps to reproduce:

    1. Create a new spreadsheet in Microsoft Excel 2010.
    2. Select and right-click a cell, and then choose Format Cells.
    3. On the Fill tab, click Fill Effects, and then click the option that you want.
    4. Save the file as XLSX.
    5. Open the same file in LibreOffice Calc.

Actual results:
The background gradient of cell is incorrect.

Expected results:
The background gradient of cell should’t change.


LibreOffice details:
Version: 6.2.0.0.alpha0+
Build ID: cf2825d9f8af86a73aae5ac4216966504b320184
CPU threads: 4; OS: Windows 6.1; UI render: default; VCL: win;
TinderBox: Win-x86@42, Branch:master, Time: 2018-10-15_00:25:36
Locale: en-US (hu_HU); Calc: threaded