Documentation – Configuring Fonts for Rendering Spreadsheets with Golang via C++

Gocpp: Supported Font Formats with Go

Mon, 01 Jan 0001 00:00:00 +0000

Format	Description
TTF	TrueType Fonts
TTC	TrueType Collection
OTF	OpenType Fonts

Gocpp: Set DefaultFont property of PdfSaveOptions and ImageOrPrintOptions to have priority with Golang via C++

Mon, 01 Jan 0001 00:00:00 +0000

Possible Usage Scenarios

While setting the DefaultFont property of PdfSaveOptions and ImageOrPrintOptions, you might expect that saving to PDF or image would set that DefaultFont for all the text in a workbook that has a missing (not installed) font.

Generally, when saving to PDF or image, Aspose.Cells will first try to set the Workbook’s default font (i.e., Workbook.DefaultStyle.Font). If the workbook’s default font still cannot show/render text properly, then Aspose.Cells will try to render with the font specified by the DefaultFont attribute in PdfSaveOptions/ImageOrPrintOptions.

To address your expectation, we have a Boolean property named CheckWorkbookDefaultFont in PdfSaveOptions/ImageOrPrintOptions. You can set it to false to disable trying the workbook’s default font, or let the DefaultFont setting in PdfSaveOptions/ImageOrPrintOptions have priority.

Set DefaultFont property of PdfSaveOptions/ImageOrPrintOptions

The following sample code opens an Excel file. The A1 cell (in the first worksheet) contains the text “Christmas Time Font text”. The font name is “Christmas Time Personal Use”, which is not installed on the machine. We set the DefaultFont attribute of PdfSaveOptions/ImageOrPrintOptions to “Times New Roman”. We also set the CheckWorkbookDefaultFont Boolean property to false, which ensures that the text of the A1 cell is rendered with “Times New Roman” and does not use the workbook’s default font (“Calibri” in this case). The code renders the first worksheet to PNG and TIFF image formats and finally renders it to a PDF file format.

The default value of the CheckWorkbookDefaultFont attribute is true.

This is the screenshot of the template file used in the example code.

This is the output PNG image after setting the ImageOrPrintOptions.GetDefaultFont() property to “Times New Roman”.

See the output TIFF image after setting the ImageOrPrintOptions.GetDefaultFont() property to “Times New Roman”.

See the output PDF file after setting the PdfSaveOptions property to “Times New Roman”.

Sample Code

Gocpp: Set Default Font while rendering spreadsheet to images with Golang via C++

Mon, 01 Jan 0001 00:00:00 +0000

Please use the ImageOrPrintOptions.GetDefaultFont() property to set the default font while rendering spreadsheets to images. This property will only be effective when the default font of the workbook cannot render the characters. The default font specified with ImageOrPrintOptions.GetDefaultFont() property is used for all those cells which have invalid or non‑existent fonts.

Set Default Font while rendering spreadsheet to images

The following sample code creates a workbook, adds some text in cell A4 of the first worksheet, and sets its font to an invalid or non‑existent font. Then, it takes two images of the worksheet. The first image is generated by setting the ImageOrPrintOptions.GetDefaultFont() property to Courier New, and the second image is generated by setting the same property to Times New Roman.

This is the output image after setting the ImageOrPrintOptions.GetDefaultFont() property to Courier New.

This is the output image after setting the ImageOrPrintOptions.GetDefaultFont() property to Times New Roman.