https://bugs.documentfoundation.org/show_bug.cgi?id=157668
Bug ID: 157668
Summary: Allow passing parameters to graphic export filters
Product: LibreOffice
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Keywords: difficultyMedium, easyHack, skillCpp
Severity: normal
Priority: medium
Component: LibreOffice
Assignee: [email protected]
Reporter: [email protected]
Since LibreOffice v.7.4, there is a way to pass any filter option available for
PDF export, from the command line [1], [2].
The commit that enabled that was 0c3b8792b712e939d2ad524d554f96616b4844be.
Currently there is no way to pass e.g. dimensions, or resolution, or other
parameters to the graphic export (PNG/JPEG/etc.) from the command line, because
a command line like
> soffice --convert-to png:writer_png_Export:params_here example.odt
will pass the string "params_here" into the respective filter inside a property
called "FilterOptions", while the filter only uses a property named
"FilterData", which must be a sequence of beans::PropertyValue. See
GraphicExportFilter::gatherProperties.
The idea is to implement a similar processing of FilterOptions in the
gatherProperties, as implemented in the abovementioned commit for PDF. The
syntax of the passed parameters should be the same as for the PDF, i.e. a JSON
structure like
> soffice --convert-to
> 'png:writer_png_Export:{"PixelWidth":{"type":"long","value":"200"},"PixelHeight":{"type":"long","value":"100"}}'
> example.odt
[1] https://vmiklos.hu/blog/pdf-convert-to.html
[2]
https://help.libreoffice.org/latest/en-US/text/shared/guide/pdf_params.html?DbPAR=SHARED
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